Abstract: The disclosure discloses a method and device for detecting insulation state in a conversion system, wherein the conversion system includes an excitation source, a converter having an input end coupled to the excitation source, a connection element coupled between an output end of the converter and a reference point, and a coupling impedance having a first end coupled to the excitation source and a second end coupled to the reference point, the method for detecting insulation state including steps of: S1, controlling at least one main power switch of the converter not to switch; S2, detecting a pulse current signal of the connection element; and S3, processing the pulse current signal and outputting a partial discharge information, the partial discharge information indicating an insulation state of an isolating transformer in the converter. The disclosure can overcome electromagnetic interference of high frequency steep waves on a partial discharge signal.

Abstract: A method operates a power converter having power converter arms, which are switchable between in each case an AC voltage side and a DC voltage side or connectable to phase lines of an AC voltage power supply system. Each power converter arm has a series circuit of switching modules each having a plurality of semiconductor switches and an energy store, in which at least one temperature value for the power converter is determined. A setpoint current limitation value is determined taking into consideration the temperature value, and a setpoint current value is determined taking into consideration the setpoint current limitation value. The temperature value, the arm setpoint current value, the arm actual current value and/or the arm setpoint current limitation value is time-integrated to form an arm integral value. When the arm integral value reaches or exceeds a predetermined arm integral threshold value, a protective measure is performed.

Abstract: A capacitor bank that includes at least two capacitors wherein the capacitor bank is configured to change the quantity of phases of the input voltage within the capacitor bank. The capacitor bank of the preferred embodiment of the present invention includes a first capacitor and a second capacitor. The first capacitor and second capacitor are three phase capacitors each having three terminals configured to couple to an input voltage. The capacitor bank is wired so as to have a first source of an input voltage coupled to two terminals of the first capacitor and one terminal of the second capacitor. A second source of the input voltage is electrically coupled to one terminal of the first capacitor and two terminals of the second capacitor. The capacitor bank is operable to change the double phase input voltage into three phases within the capacitor bank.

Abstract: A voltage supply circuit includes a rectifier circuit, a charging circuit, a feedback circuit and an energy storage circuit. The rectifier circuit is used to receive an input voltage to generate a rectified energy. The charging circuit is coupled to the rectifier circuit and has a modulation input terminal and an energy supply terminal. The modulation input terminal is used to receive a modulation voltage, and the energy supply terminal is used to selectively output a charging current according to the modulation voltage. The feedback circuit is used to receive a high voltage signal and a supply voltage, and output the modulation voltage to the modulation input terminal. The feedback circuit is used to adjust the modulation voltage according to a difference between the supply voltage and a reference voltage. The energy storage circuit is charged by the charging current to pull up the supply voltage.

Abstract: Systems and methods for boosting resiliency of a power distribution network (PDN) are provided. A distributed energy resource (DER) hosting process can be used to boost network resiliency through the use of locally installed DER systems that can be operated, dispatched, and/or controlled as individual power plants. A unique critical infrastructure (CI) ranking scheme can be used to prioritize CIs to be optimally located close to the DER while increasing the DER hosting capacity of the network.

Abstract: The detection matrix for an Orthogonal Differential Vector Signaling code is typically embodied as a transistor circuit with multiple active signal inputs. An alternative detection matrix approach uses passive resistor networks to sum at least some of the input terms before active detection.

Abstract: Systems, methods, and frameworks for distribution grid optimal power flow (D-OPF) are provided, to find the optimal droop and mode settings of smart inverters (SIs). The droop and mode settings of SIs can be found as per the Institute of Electrical and Electronics Engineers (IEEE)-1547 in coordination with the operations of legacy voltage control devices for optimal Volt-VAR control performance. The D-OPF framework can utilize two timescale coordination of control of legacy grid voltage control devices, modes and droop settings of SIs, and active/reactive power dispatch of SIs.

Abstract: A capacitor bank that includes at least two capacitors wherein the capacitor bank is configured to change the quantity of phases of the input voltage within the capacitor bank. The capacitor bank of the preferred embodiment of the present invention includes a first capacitor and a second capacitor. The first capacitor and second capacitor are three phase capacitors each having three terminals configured to couple to an input voltage. The capacitor bank is wired so as to have a first source of an input voltage coupled to two terminals of the first capacitor and one terminal of the second capacitor. A second source of the input voltage is electrically coupled to one terminal of the first capacitor and two terminals of the second capacitor. The capacitor bank is operable to change the double phase input voltage into three phases within the capacitor bank.

Abstract: A system for using load tap changing (LTC) transformers and voltage regulators (VR) to reduce the voltage in a power transmission system by temporarily disabling the upper band voltage and temporarily designating the bandcenter as the upper band edge voltage whereby the tap selector switches operate in set increments to reduce applied voltage to a level that is between the redesigned bandcenter and the lower band edge.

Abstract: Disclosed are a driver IC circuit of an intelligent power module, an intelligent power module and an air conditioner. The driver IC circuit includes: an operating voltage input end, an inverter logic buffer circuit, an upper bridge driver circuit, a lower bridge driver circuit, a PFC logic buffer circuit, a PFC driver circuit, a first voltage regulation control input end, a second voltage regulation control input end, a first voltage regulation module and a second voltage regulation module. The first voltage regulation module increases or decreases the operating voltage according to the first voltage regulation control signal; the second voltage regulation module increase or decreases the operating voltage according to the second voltage regulation control signal; or output the operating voltage to the PFC logic buffer input circuit and the PFC driver circuit. The problem that existing driver IC circuits cannot directly drive SiC-based power switching devices can be solved.

Abstract: A microgrid system and method of controlling same, the microgrid system comprising a storage battery (5000), an energy storage converter (1000), a monitoring circuit and a controllable switch (2000). When the microgrid system is in grid-connected mode, the energy storage converter outputs steady power under the control of an inner current loop unit (1220); in grid-connected mode, an outer voltage loop unit (1240) does not participate in control, but remains in an operating state, and on the basis of four outer voltage loop unit input signals, estimates in advance a specified current loop signal (Uvo) for handover from grid-connected mode to island mode. When the microgrid system hands over from grid-connected mode to island mode, the outer voltage loop unit goes into operation, and the inner current loop unit controls a steady output voltage and frequency from the energy storage converter according to the pre-estimated specified current loop signal output by the outer voltage loop unit.

Abstract: The invention relates to electrical engineering, specifically to apparatuses and methods for transmission of electrical energy using resonant techniques between stationary objects, as well as between stationary power sources and movable devices that receive energy. The technical result is achieved by eliminating the occurrence, on the transmission line, of a potential antinode of a standing wave of potential, as well as by eliminating the occurrence, in the transmission line, of a current antinode of a standing wave of current, which fact simplifies operation and reduces the cost of the transmission system, improves environmental situation along the transmission line due to decreased intensity of electrical and magnetic fields, reduces the influence of the capacitance of the conductor of the transmission line on the resonant windings of Tesla transformers.

Abstract: A pre-driver circuit generates a driver bias signal based on a swing command, a driver impedance characteristic, and an input signal. A driver receives the driver bias signal and generates, in response, a driver signal having a swing and having an output impedance corresponding to the bias signal. Optionally, the driver receives power from a switchable one of multiple supply rails, according to the swing. Optionally, the driver has voltage controlled resistor elements and the driver bias signal is generated based on the swing command and a replica of the driver voltage controlled resistor elements.

Abstract: Embodiments of a method and a device are disclosed. A circuit can include a power factor corrector, wherein two or more desired input variables can be defined for the power factor corrector, and a processor that communicates with the power factor corrector, and which selects variables in the power factor corrector with respect to the two or more desired input variables defined for the power factor corrector. The two or more desired input variables can include a switching frequency and an input current and the variables can include an amount of operation in a conduction mode and at least one of a primary peak current and a primary conduction interval. The variables in the power factor corrector can be adapted to the two or more desired input variables to allow the power factor corrector to operate in an operating mode that can include the conduction mode.

Abstract: A power factor corrector circuit and a method of operating the power factor corrector circuit can include a power factor corrector, wherein two or more input variables can be defined for the power factor corrector including a peak current and an input current. A processor can select corresponding variables in the power factor corrector with respect to the two or more input variables defined for the power factor corrector, and the corresponding variables can include a peak current and an input current. The corresponding variables in the power factor corrector can adapt to the two or more input variables to allow the power factor corrector to operate in a conduction mode.

Abstract: The present invention relates to resistance calibration and in particular to resistance calibration in the context of semiconductor integrated circuitry.

Abstract: An auxiliary supply for a current supply with at least one transformer with a primary side and a secondary side, wherein the auxiliary supply includes at least one frequency generator arranged on the primary side for generating an alternating voltage with predetermined frequency, a rectifier unit arranged on the secondary side for a secondary-side supply voltage and first and second potential separation units arranged between the primary side and the secondary side, where the first potential separation unit is connected on the primary side via, for example, a high-value impedance to the frequency generator, where on the primary side, the second potential separation unit has a high-frequency coupling to a reference potential assigned to the frequency generator and provides a low-ohmic capacitive connection between a secondary-side reference potential and the primary side, where it is possible to use a voltage drop at the impedance to evaluate the secondary-side supply voltage.

Abstract: A power factor correction circuit includes a power transistor, an inductor, and detection circuitry. The inductor is coupled to a drain terminal of the power transistor. The detection circuitry is coupled to the drain terminal of the power transistor. The detection circuitry is configured to determine an input voltage applied to the inductor based on resonant ringing of voltage at the drain terminal, and to detect a valley in the voltage at the drain terminal based on the input voltage applied to the inductor.

Abstract: A power factor correction device for an AC voltage supply system includes a transformer which is interconnected, on the secondary side, to form a star point circuit and which has a secondary-side connection for each phase. A module series circuit with at least two switching modules, which are connected in series and each of which has at least four switches and a capacitor, is respectively connected between each of the secondary-side connections of the transformer and the star point of the star circuit. There is provided a transformer which is a high-leakage-reactance transformer.

Abstract: The present disclosure discloses a power conversion apparatus and a method for configuring the same. The power conversion apparatus includes a boost unit and at least two power conversion units; each of the power conversion units has two input ends; an input end of the boost unit is connected with one end of an alternating-current power supply, and an output end of the boost unit is connected with one input end of a first power conversion unit of the plurality of power conversion units; one input end of a last power conversion unit of the plurality of power conversion units is connected with the other end of the alternating-current power supply; and the input ends of the plurality of power conversion units are connected in series, and the output ends of the plurality of power conversion units are connected in parallel.

Abstract: A high-powered, high-voltage test device for generating a test voltage, wherein the test voltage is an alternating voltage having an amplitude of at least 100 kV at a power of greater than 1 kW, wherein the device has at least two voltage amplifier branches, of which a first voltage amplifier branch contributes to generating the positive voltage half-cycles of the test voltage and a second voltage amplifier branch contributes to generating the negative voltage half-cycles of the test voltage. The high-voltage test device furthermore has a measurement circuit for measuring the test voltage to be applied to a measurement object and the test current consequently caused in the measurement object and is characterized in that each voltage amplifier branch is installed in a separate assembly having integrated active air cooling.

Abstract: A signal source generates a drive signal according to a dimming level. A discharge part includes a series circuit having a Zener diode and a rectifier element connected in series. The series circuit enables passage of a reverse current of the Zener diode. In the discharge part, the series circuit is electrically connected between a control terminal and the signal source to enable the reverse current of the Zener diode to flow from the control terminal to the signal source.

Abstract: Systems and methods for governing a signal waveform of a signal flowing through a component of a power transmission system that includes a plurality of switch-mode power processors and may be a polyphase system. At least one of current and voltage is integrally monitored at each of a plurality of locations on the power system and is characterized relative to specified constraints. When a monitored voltage or current is outside of the specified constraints, the voltage or current is modified by changing at least one of the time delay or phase characteristics of at least one of the source, load and transmission elements on the power transmission system.

Abstract: The present disclosure relates a reactive power compensation system including a detection unit for acquiring loading state information of a plurality of loads, a reactive power compensation unit for compensating reactive power, and a controller for controlling the reactive power compensation unit to perform flicker compensation or power factor compensation based on a control signal according to the loading state information.

Abstract: A high-efficiency system for conducting power factor (PF) and harmonics correction in an electrical network, comprising a controller; a digital PFC capacitor array comprising two or more passive PFC capacitors, providing fine steps increments in the PF correction; and linear PFC capacitor arrays, providing coarse steps increments in the PF correction. The PF correction in coarse steps increments and fine steps increments allow a total or near total PF correction without overcompensation. Optionally, the system further comprises a lower power active power filter (APF) configured to only target and eliminate or minimize harmonics in the electrical network.

Abstract: To protect an electrical load from anomalous electricity provided by an electricity source, a switching mechanism is configured to transition into one of conducting and non-conducting states in response to respective on and off states of a switching signal. A power controller evaluates input frequency characteristics of an overvoltage event in input electricity provided by the electricity source against at least one frequency criterion. Event timing is established for the timing signal that corresponds to the frequency characteristics met by the frequency threshold criterion. The event timing coordinates the overvoltage event with the state transitions of the switching mechanism so that an amplitude notch is superimposed on the input electricity over a temporal duration proportionate to that of the overvoltage event. State transitions are compelled in the switching mechanism to superimpose the amplitude notch on the input electricity in accordance with the event timing.

Abstract: A half bridge for an active rectifier having an alternating-voltage connection, a positive direct-voltage connection, as well as a ground connection, a first switch element connecting the alternating-voltage connection to the ground connection; a second switch element connecting the alternating-voltage connection to the positive direct-voltage connection, a first control element being connected to the first switch element for switching the first switch element; a connection of a first capacitor being connected to a voltage supply connection of the first control element; the positive direct-voltage connection being connected via a first diode in the forward direction to the one connection of the first capacitor; the first capacitor being connected in parallel to a series connection of the first switch element and the second switch element.

Abstract: In a modular multi-level power converter, additional switching states are interleaved between main switching states that control output voltage or waveform. The additional switching states provide current from a DC-link to charge capacitors in respective modules or cells to an offset voltage from which the capacitor voltages are controlled toward a reference voltage during each switching cycle rather than being allowed to build up over a period of an output waveform of variable line frequency, possibly including zero frequency. Since the switching cycle is much shorter than the duration of a line frequency cycle and the capacitor voltages are balanced during each switching cycle, output voltage ripple can be limited as desired with a capacitor of much smaller value and size than would otherwise be required.

Abstract: An AC-AC converter system includes transformer arrangements and HVDC converter units on primary and secondary sides of the system, respectively. The system exhibits first and second three-phase AC networks, and the converter units are interconnected via a DC connection. By integrating at least part of two transformer arrangements in one transformer unit, a cost efficient transformer configuration can be achieved.

Abstract: Methods and systems for controlling power conversion systems. In one aspect, a power management system includes a first power conversion system coupled to a first energy source and a second power conversion system coupled to a second energy source, and a control system. The control system causes, while the first power conversion system is operating in an active mode and the second power conversion system is operating in a standby mode, the second power conversion system to exit the standby mode, the second power conversion system providing a reactive power flow upon exiting the standby mode. The control system causes the first power conversion system to provide a compensatory reactive power flow to compensate for at least a portion of the reactive power flow from the second power conversion system.

Abstract: Exemplary embodiments are directed to bidirectional wireless power transfer using magnetic resonance in a coupling mode region between a charging base (CB) and a battery electric vehicle (BEV). For different configurations, the wireless power transfer can occur from the CB to the BEV and from the BEV to the CB.

Abstract: A system for determining the output capacity of a power generating system including a sensor that monitors at least one condition of the power generating system and outputs the monitored condition data, and a power capability determination device that dynamically determines a full capacity of the power generating system based upon the outputted environmental data from the electronic controller.

Abstract: A method and apparatus used for electric isolation transmission are provided. The method includes: providing an isolation transmission circuit having at least one capacitor; and implementing electric isolation between the primary side and secondary side, and suppressing leakage currents generated between the primary side and secondary side and transmitting power. The apparatus includes the isolation transmission circuit that is manufactured by capacitor(s). The apparatus can be applied to light-weight power sources providing AC/DC outputs with high efficiency, adapters, or related products. In addition, the apparatus has a reduced size and higher power transmission efficiency.

Abstract: A power factor correction apparatus is retrofittable to an appliance having an inductive load. The apparatus includes a housing having an electrical socket on one side and an electrical plug on the other side. Inside the housing are a power factor correction circuit and a trigger circuit. The socket and plug are electrically coupled to each other by the trigger circuit which automatically couples the power factor correction circuit between the socket and the plug when current flowing to the appliance is sensed.

Abstract: The present invention relates to a harmonic compensation circuit for compensating at least the third harmonic in the input current (Imains) drawn by an LED light source (1) from a mains voltage supply (2), comprising: a signal input (21, 22) for receiving a first input signal proportional to the input voltage (Vin) of said LED light source (1) and a second input signal (Vsh) proportional to the LED current (ILED) of said LED light source (1), a signal output (25) for outputting a compensation current (Icomp), a processing unit (24a, 24b) for comparing said second input signal (Vsh) to a reference signal (VRb, VR7) and for generating said compensation current (Icomp) based on said comparison, the sum of said compensation current (Icomp) and said LED current (ILED) being proportional to the input voltage (Vin) of said LED light source (1) and said compensation current (Icomp) being provided for minimizing at least the third harmonic in the input current (Imains) drawn by said LED light source (1) from said main

Abstract: The present invention relates to a PFC control circuit, an active PFC circuit, and a PFC control method. According to an embodiment of the present invention, a PFC control circuit including: an inductor current sensing unit for sensing an inductor current of a PFC circuit; an output voltage feedback unit for outputting a feedback output signal; a sensing and feedback signal application unit for outputting a sensing voltage signal during switching duty on of the PFC circuit and adding the feedback output signal to the sensing voltage signal to output the added signal during switching duty off of the PFC circuit; and a PFC control unit for generating a comparison signal and generating a duty control signal from the comparison signal and a first reference signal to make variations due to an internal offset be removed or reduced is provided.

Abstract: The disclosure relates to a passive power factor correction circuit. The passive power factor correction circuit comprises: a filtering device being used for decreasing high order harmonic of an input current; a resonance device being coupled to the filtering device for controlling operation time of the input current; and a suppression device being coupled to the resonance device for suppressing ripple of the input current.

Abstract: A power factor corrector correcting the power factor of an alternating current (AC) voltage is disclosed. A power factor correcting unit corrects the power factor of the AC voltage. A smoothing unit smoothes a power factor corrected voltage and includes a film condenser and a plurality of electrolytic condensers. A rectified voltage is applied to one end of an inductor. One end of a switch is connected to the other end of the inductor, and the other end of the switch is earthed. One end of a diode is connected to one end of the switch. One end of a film condenser is connected to the other end of the diode, and the other end of the film condenser is earthed. An electrolytic condenser is parallel-connected to the film condenser.

Abstract: A power factor correction (PFC) circuit includes a first inductor, which is operably supplied with an input voltage and an input current. The input voltage is a rectified AC line voltage. A semiconductor switch has a load current path coupled in series with the first inductor. An output terminal is coupled to the inductor and operably providing an output voltage and an output current. A controller circuit controls the cyclic switching operation of the semiconductor switch. The controller circuit is configured to monitor a feedback signal representing the voltage drop across the load current path of the semiconductor switch, to detect at least one local minimum in the feedback signal while the semiconductor switch is off, and to switch on the semiconductor switch in response to detecting the N-th local minimum in the feedback signal.

Abstract: A power factor correction (PFC) boost circuit. The PFC boost circuit can include a first switching device, a second switching device, a first gate driver coupled to the first switching device, a second gate driver coupled to the second switching device, and a PFC controller configured to control the first and second gate drivers. The PFC controller will utilize a new technique, referred to herein as “predictive diode emulation” to control the switching devices in a desired manner and to overcome inefficiencies and other problems that might arise using traditional diode emulation. The PFC controller is configured to operate in synchronous and non-synchronous modes.

Abstract: A control circuit for reducing touch current of a power converter includes an auxiliary pin, a zero-crossing signal generator, a frequency limiting signal generator, and a gate signal generator. The auxiliary pin is used for receiving a voltage generated by an auxiliary winding of the power converter. The zero-crossing signal generator is used for generating a zero-crossing signal according to the voltage generated by the auxiliary winding and a first reference voltage. The frequency limiting signal generator is used for generating a frequency limiting signal according to a gate control signal, a burst mode signal, and the voltage generated by the auxiliary winding. The frequency limiting signal is used for limiting the gate control signal to a predetermined frequency. The gate signal generator is used for generating the gate control signal to a power switch of the power converter according to the frequency limiting signal and the zero-crossing signal.

Abstract: Methods and systems are described for providing power factor correction for high-power loads using two interleaved power factor correction stages. Each power factor correction stage includes a controllable switch that is operated to control the phasing of each power factor correction stage. The phasing of output current from the second power factor correction stage is shifted 180 degree relative to the output current from the first power factor correction stage.

Abstract: A reactive power compensator. The reactive power compensator includes a power transformer having an AC bus side and a compensator bus side, wherein the power transformer is connectable to an AC grid at the AC bus side. The reactive power compensator further includes a thyristor-switched capacitor and a thyristor-controlled reactor connected to the compensator bus side. The reactive power compensator includes a booster transformer connected in series with the power transformer and to the compensator bus side. The invention also relates to computer programs and computer program products.

Abstract: The present disclosure provides techniques for a power factor correction system having an arbitrary input waveform. The present disclosure provides two example methods of digital power factor correction that allow for a high power factor on an arbitrary input waveform. The two example methods are applicable to both constant-current inputs and constant-voltage inputs. One example method samples the arbitrary input waveform to produce a reference table used to synchronize the input voltage with the input current in a constant current system, and to synchronize the input current to the input voltage in a constant voltage system. A second example method uses instantaneous input values as a reference in performing power factor correction.

Abstract: An apparatus, system and method are described that enable an impedance of a plasma load to be matched with a power generator. In some embodiments the apparatus includes a power output adapted to apply power that is utilized to energize a plasma; a sensor adapted to sample power applied at the power output so as to obtain power samples; and an impedance control output configured to provide, responsive to the power samples, an impedance-control signal that enables an impedance matching network connected to the output of the power generator and to the impedance control output to match, responsive to the an impedance-control signal, the impedance of the plasma to the operating impedance of the power generator.

Abstract: A compensating system for a power system includes a compensator including semiconductor switch means, which compensator has phase legs which on a first side of the compensator defines AC inputs for connection to a respective phase of the power system. The phase legs are connected in wye connection at a second side of the compensator, which wye connection has a neutral point. A filter arrangement at a first side thereof is connected to the neutral point of the wye connection and at a second side is connected to the AC inputs to thereby form a circuit with the compensator. The filter arrangement is arranged such that the circuit acts essentially as an open circuit for positive sequence currents or voltages and negative sequence currents or voltages, and as a closed circuit for zero-sequence currents.

Abstract: An energy-saving device is electrically connected between an output terminal of an electric power and an input terminal of a load and includes a current dividing unit connected with the load in parallel, and a voltage dividing unit connected with the load serially. The current dividing unit has an input terminal electrically coupled to an output terminal of the load and an output terminal electrically coupled to the input terminal of the load. The voltage dividing unit has an input terminal electrically coupled to the output terminal of the electric power and an output terminal electrically coupled to the input terminal of the load. Thus, the voltage dividing unit drops the voltage of the load applied by the electric power, and the current dividing unit increases the current flowing into the load, so that the energy-saving device achieves an energy-saving purpose.

Abstract: Embodiments of the present invention, as further described below, provide active termination circuits that can be used with power transmitter circuits. Embodiments reduce power loss due to impedance matching and increase power efficiency in power transmitter circuits. In particular, embodiments provide active termination circuits that can be configured to draw minimal amounts of the output current generated by the power transmitter circuits. At the same time, embodiments achieve optimal impedance matching, thus enabling optimal power transfer to the load. Further, embodiments can be controlled adaptively in real time to reduce parasitic effects on power transfer and to optimize impedance matching. Embodiments can be implemented using various transistor technologies (e.g., MOSFET, BJT, etc.), and can be used with a variety of power transmitter circuits, including, for example, power DACs, analog/digital RF transmitters, and analog/digital PAs.

Abstract: In accordance with an embodiment, an electronic device includes a controller configured to apply slope compensation to a reference signal in a power factor corrector. The device also configured to adjust the slope compensation based on an input voltage of the power factor corrector.

Abstract: There are provided a power factor correction circuit capable of transferring extra power to a ground before performing switching for a power factor correction to thereby reduce a switching loss generated in switching for a power factor correction, and a power supply device and a motor driving device having the same. The power factor correction circuit includes: a main switch switching input power to adjust a phase difference between a current and a voltage of the input power; and an auxiliary switch switched on before the main switch is switched on, to thereby form a transmission path for extra power of the main switch.