Abstract: A method for protecting a power system having inverter-interfaced renewable energy sources is provided. The power system includes an inverter and a control system. The control system includes a current controller including a saturation limiter and a proportional and integral (PI) controller, a phase-locked system, and a low-voltage ride-through (LVRT)control unit. The method includes: by using a Park transformation matrix, determining an output voltage of the inverter; determining a modulated voltage of the output voltage; upon detecting a grid fault, obtaining current references by the LVRT control unit; determining a fault current in a first stage of a transient phase of the grid fault; determining a fault current in a second stage of the transient phase; determining a fault current in a third stage of the transient phase; and switching the control system to a fault control mode by tracking the fault currents in the first, second and third stages, to the current references.

Abstract: Systems and methods for controlling the ambient temperature within a region or zone of a building are disclosed. A system comprises a thermostat, one or more sensors placed throughout an environment, a computing cloud, and a remote mobile or desktop device running a software application (“app”). An end user may interact with an app running on the mobile device or desktop. The app may display the current conditions in a house and allow the user to select specific temperature sensors located throughout the house which the user wants to monitor and control. This selection of one or more temperature sensors is communicated to the computing cloud, and the computing cloud sends commands to the thermostat to monitor the user's selected temperature sensors for controlling the heating and cooling of the house.

Abstract: Methods, systems, and apparatus for computer aided design of physical structures include: producing a quad parameterization computer model (including quad parameter domains) of a polygon mesh, where quad parameter domain(s) adjacent to a boundary curve interpolate the boundary curve; and forming a computer model of a three dimensional object by constructing locally refinable surface representation(s) from the quad parameterization computer model, refining a boundary of the locally refinable surface representation(s) to approximate the boundary curve within a first tolerance value set in accordance with a smallest dimension representable by a geometry modeling kernel, freezing control points of the locally refinable surface representation(s) at the boundary, and modifying remaining interior portions of the locally refinable surface representation(s) to approximate the polygon mesh within a second tolerance value that is at least an order of magnitude larger than the first tolerance value.

Abstract: An air conditioning device includes an air purifier, a sensor, a communicator, and a processor. The sensor is configured to measure an air pollution level. The communicator comprises circuitry and configured to communicate with a server. The processor is configured to activate the sensor in a state where the air purifier is not driven, in response to receiving a first signal requesting an air pollution level state information from the server based on a location of a mobile terminal, transmit a second signal indicating that the air conditioning device needs to be driven to the server based on the air pollution level measured by the sensor, and drive the air purifier in response to a driving instruction received from the server.

Abstract: The present disclosure relates to systems and methods for optimizing resource operations within an energy network. The systems and methods can include retrieving historical interval meter data, profile data, and a curtailment plan, determining, using the historical interval meter data, estimated annual deviation of a customer's load based on average interval load divided by peak load over a given period, calculating a load curtailment for the customer based on the historical interval meter data, the profile data, the curtailment plan, and the estimated annual deviation of the customer's load, and building a report, using the load curtailment, indicating a resource commitment capability for the customer to help inform market participation and operational decision making for load curtailment and distributed energy resources (DER).

Abstract: During each of a plurality of iterations, a policy of a controller is updated and at least part of a process is controlled using the updated policy. The updated policy is associated with a performance level of the controller. For each iteration, the updated policy is determined using the associations generated during one or more previous iterations between the policies and the corresponding performance levels of the controller in controlling the at least part of the process, such that the updated policy is optimized to have a highest likelihood of producing a positive change in the performance level of the controller in controlling the at least part of the process rather than optimized to have a highest likelihood of producing a largest positive magnitude of change in the performance level of the controller in controlling the at least part of the process relative to the previous iteration.

Abstract: An electricity management system for a residential setting includes a controller that is coupled with a plurality of appliances. A plurality of sensors are coupled with the controller and respectively coupled to the plurality of appliances. The controller cooperates with the sensors and the appliances to generate a demand response plan for delivering electrical power to the plurality of appliances. The demand response plan includes a shifting strategy that regulates a delivery of electrical power based upon a regional pattern of electrical consumption, a shedding strategy that maintains a household consumption of electrical power below a household upper consumption limit and a modulating strategy based upon the respective operating cycles of the plurality of appliances that prevents a simultaneous peak electrical event within more than one appliance of the plurality of appliances. The shifting strategy, the shedding strategy and the modulating strategy are implemented contemporaneously.

Abstract: Tools, strategies, and techniques are provided for enhancing the control and operation of air curtain devices. The air curtain device can be provided with a computer system programmed to receive input data from various sensors and to communicate the sensor data to a wireless mesh computer architecture. An algorithm module can be programmed to determine adjusted settings or parameters for the air curtain device in response to the sensor data and/or other data sources such as external data sources. Data may be obtained from multiple air curtain devices configured for cooperative performance, and operating parameters or settings may be adjusted in connection with one or more of the multiple air curtain devices. A control device of the air curtain may be provided with a unitary structure suitable for efficient installation of multiple control harness connectors thereon to supply power and/or to establish data connectivity with multiple components of the control device.

Abstract: A transformer economizer automatically disconnects a main electric power transformer from a grid power line during low-load periods, and automatically reconnects the main transformer to the grid power line during high-load periods, to reduce low-power electricity losses incurred by the main transformer. The main transformer is therefore deenergized and a much smaller auxiliary transformer is energized during low-load periods to reduce the low-power electricity losses incurred by the main transformer. The main transformer is then automatically switched back into service during high-load periods, while the auxiliary transformer is switched out of service. This provides long-term energy, cost, and carbon footprint savings by automatically switching the large transformer's loads to a much smaller auxiliary transformer, and therefore proportionally lower losses, during light-load conditions.

Abstract: A method and apparatus for summarizing and conveying expected thermal responses is described. Expected thermal responses of a room or an entire structure are calculated based on thermostat setpoints. The expected thermal responses are summarized into an expected thermal response visualization and displayed to a user for easy understanding of current, and future, temperature expectations before or as a room or entire structure is heated or cooled.

Abstract: Provided is a highly reliable technology for optimizing an action for controlling an environment in a target space.

Abstract: The present disclosure provides a thermostat applied to a heating, ventilation and air conditioning (HVAC) system including: a memory storing machine executable instructions; one or more processors, wherein when the machine executable instructions are executed, the one or more processors are configured to perform the following operations: obtaining device information of the HVAC system, and region information of a user's location; according to the device information of the HVAC system and the region information, in response to an energy saving mode and a schedule selected by the user, determining a predicted energy consumption and a reference energy consumption; and determining energy saving amount according to the predicted energy consumption and the reference energy consumption.

Abstract: A machine learning method according to an embodiment is a machine learning method performed by a computer and includes the steps of: allowing a calculator to calculate output information from each of items of input information; determining whether the output information is correct or incorrect based on the output information and answer information set for the plurality of pieces of input information; allowing the calculator to calculate the output information from each of at least one first input information, which is included in the plurality of pieces of input information and corresponds to the output information determined to be incorrect, and at least one second input information included in the plurality of pieces of input information; and changing the calculator based on the output information.

Abstract: An electrical distribution site energy management and router device, or SER device, may be installed between a customer premises and a distribution grid, and one or more alternative energy sources and energy storage devices may be electrically connected to the SER device. The SER device may intelligently route power from alternative energy sources to the customer premises, energy storage devices, even to the grid, through various modes of operation. The SER device may efficiently and economically route power during peak electricity price periods and outside of peak periods.

Abstract: The present application provides a temperature control method. According to the present application, in response to receiving a state adjustment command for a temperature sensing device, by adjusting a communication connection state between a temperature control device and the temperature sensing device based on the state adjustment command, flexible adjustment of temperature sensing devices included in a target temperature control system is implemented, and further by acquiring temperature collected by each temperature sensing device in the target temperature control system, determining ambient temperature based on the temperature collected by each temperature sensing device and a setting coefficient corresponding to an energy consumption mode state of each temperature sensing device, and adjusting temperature of a set space based on the ambient temperature, temperature control over the set space is implemented more smartly and flexibly through the target temperature control system.

Abstract: A system and method for transporting cool fresh outside air into an occupied quarters which has an interface member, input connectors, output connectors, switches, and a microcontroller controllably coupled to the plurality of switches. When the thermostat controller system is operating during a heating period, the switches are closed by the microcontroller such that the thermostat controller system controls the operation of the remote air-handling unit that heats air provided to an occupied quarters. When the thermostat controller system is operating during a cooling period, the switches are opened by the microcontroller such that the thermostat controller system no longer controls the operation of the remote air-handling unit when a temperature of outside air is at least less than a cooling set point. The microcontroller operates a remote fan to draw the outside air into the occupied quarters when the outdoor air temperature is less than the cooling set point.

Abstract: A system and methods are disclosed for producing components via additive manufacturing. In one embodiment, a three-dimensional geometry is sliced using a slicing plane to obtain a first two-dimensional geometry. A first polyline is generated based on a first skeleton of the first two-dimensional geometry, and a first slender body is generated based on the first polyline. The first slender body is subtracted from the first two-dimensional geometry to obtain a second two-dimensional geometry. A second polyline is generated based on a second skeleton of the second two-dimensional geometry. A first bundle of fibers is produced based on a segmentation of the first polyline and a second bundle of fibers is produced based on a segmentation of the second polyline. A component is produced from the first and second bundles of fibers using an additive manufacturing process.

Abstract: The disclosure describes a system that includes a controller configured to receive a representation of a three-dimensional geometry of a preform, determine a set of dimensions of the preform from the representation of the preform, and determine dimensions of at least one insert for a fixed tooling based on a dimensional tolerance of the preform, the set of dimensions of the preform, and dimensions of the fixed tooling.

Abstract: A method for producing a support structure of a 3D model for 3D printing is provided. A method for producing a support according to an embodiment of the present invention comprises the steps of: dividing a surface constituting a 3D model into multiple surface patches; classifying respective divided surface patches according to geometric characteristics; and producing supports corresponding to the classified characteristics with regard to respective surface patches. Accordingly, during metal laminate manufacturing, the output stability may be improved while reducing the support producing process time. In addition, the surfaces may be expressed by different colors according to the result of geometric characteristic classification, and the supports may also be expressed by different colors according to the type, thereby playing the role of guide lines such that the user can recognize the shape of the surfaces and the type of supports to be installed on the corresponding surfaces.

Abstract: An integrated method for assessing metabolic rate and maintaining indoor air quality and efficient ventilation energy use. A physical sensor assesses room occupancy. An actuated ventilation system is set to a constant CO2 level in a predetermined healthy range, where the actuated ventilation system includes a CO2 sensor. The actuated ventilation system sets a first air ventilation rate and the sensor measures a first CO2 level. The system determines whether CO2 level is in a healthy range, if not then the CO2 level is adjusted by setting a subsequent air ventilation rate. A subsequent CO2 level is measured. If the CO2 level is determined to meet a predetermined healthy range, then an assessment of change of air ventilation rate (? ACH) is determined. The determination of air change rate can be further augmented by a physical pressure based measurement. The overall metabolic rate is generated.