Abstract: The present invention discloses a division method and system for distributed renewable-energy electricity generation clusters, where the method includes: obtaining electric power consumption-absorption data of the electricity-generation clusters; extracting and analyzing the absorbed electricity quantities of the corresponding target single electricity generators or the consumed electricity quantities of the corresponding target energy consumption nodes; constructing and determining consumption-absorption matching groups for a plurality of electricity generator sets and energy consumption districts according to distances from the target single electricity generators to the target energy consumption nodes, and executing division for the electricity-generation clusters. According to the present invention, energy waste can be avoided, and then management efficiency is increased.

Abstract: The present invention discloses a method and a system for controlling an overvoltage in a photovoltaic court based on a floating neutral voltage, including: acquiring, by a controller, a voltage U of the photovoltaic court and a voltage U0 of a transformer neutral point; comparing acquired voltage data with a set threshold; generating control instructions of offsetting and compensation according to a comparison result; and receiving the instructions by a neutral voltage regulator, and controlling a voltage. The present invention introduces a floating neutral line between a photovoltaic power supply and a grid-connected transformer neutral point, and arranges a neutral voltage regulator on the floating neutral line. By adjusting its direction and size, the neutral voltage regulator can adapt to the voltage problem of the court in different states. Meanwhile, by adjusting the voltage on the grid-connected transformer neutral point side, the voltage of the grid-connected transformer neutral point is zero.

Abstract: The present invention discloses a progressive power grid planning evaluation method and system based on a combination assessment theory, and relates to the technical field of power grid assessment and optimization. The method includes: correcting a weight of an obtained index by using a combination weighting method; obtaining an assessed value based on a similarity theory assessment method; standardizing an index by dimensionless processing; and performing evaluation based on nonparametric regression. The present invention ensures objectivity and fairness of an assessment result and the efficiency and the accuracy of assessment are improved. The present invention may be adaptively adjusted, making the assessment result closer to reality.

Abstract: The present invention relates to the technical field of gravity energy storage, and in particular to a slope type gravity energy storage transmission device, including: a chain, provided with a lower gentle area, an ascending area and an upper gentle area; a connecting mechanism, including a connecting base, a locking frame slidingly, and a fastening plate; and an abutting mechanism, including a fixed plate and an inserting frame. According to the present invention, in the process of lifting a flexible trolley, the fastening plate is in a locked state without causing the separation of the inserting frame, so the separation phenomenon can be avoided, and the potential safety hazard can be reduced.

Abstract: The present invention discloses a hub type energy storage mass block transport device in the technical field of transportation of energy storage blocks. The hub type energy storage mass block transport device includes: a bearing unit, including a bearing part, including correction parts, two groups of guide parts, and a fixed frame; and a limiting unit, including a trigger part, a prying part and a locking part, where the fixed frame is slidingly connected below the locking part. According to the present invention, the hub type mass block can be effectively prevented from accidentally falling in the transportation process by limiting from three directions, and the safety in the transportation process can be ensured.

Abstract: The present invention discloses a rail connection and conveying device, and relates to the technical field of slope rail type gravity energy accumulation, including a connection part, including a lifting piece and a rotating piece; a receiving part, mounted on the connection part and including a receiving shell, conveying belts and a frame, and a force-accumulating part, including a force-accumulating piece, a ratchet wheel and ratchet piece, an input bevel gear, and two output bevel gears. The present invention ensures that no matter the transport trolley enters from any side, the transport trolley can transfer kinetic energy and convert the kinetic energy into potential energy of a force-accumulating piece.

Abstract: The present invention discloses a hierarchical and graded source-network-load-storage multi-subject collaborative scheduling method and system, and relates to the technical field of new energy. The method includes: obtaining power supply data, obtaining electricity consumption data corresponding to each level of an urban area, and obtaining energy storage data of electricity storage devices; obtaining historical data sets, and analyzing the power supply data, the electricity consumption data, and the energy storage data to obtain estimated electric energy data; and calling the electricity storage devices in surrounding regions according to the adjusted secondary electricity consumption data of the urban area. The present invention may optimize and schedule on sources, networks, loads, and storage.

Abstract: The present invention discloses an intelligent control system for a distributed photovoltaic power generation cluster, and relate to the field of distributed energy technologies. The intelligent control system includes: a data acquisition module, used for acquiring demand basic data, supply basic data, and fault basic data respectively to form control basic data; a data analysis module, used for analyzing the control basic data to obtain control analysis data; a data processing module, used for processing the control analysis data to obtain a supply and demand balance reference value; and an intelligent control module, used for intelligently controlling the photovoltaic power generation cluster according to the supply and demand balance reference value.

Abstract: The present invention discloses a division method and system for distributed renewable-energy electricity generation clusters, where the method includes: obtaining electric power consumption-absorption data of the electricity-generation clusters; extracting and analyzing the absorbed electricity quantities of the corresponding target single electricity generators or the consumed electricity quantities of the corresponding target energy consumption nodes; constructing and determining consumption-absorption matching groups for a plurality of electricity generator sets and energy consumption districts according to distances from the target single electricity generators to the target energy consumption nodes, and executing division for the electricity-generation clusters. According to the present invention, energy waste can be avoided, and then management efficiency is increased.

Abstract: Disclosed is a power grid transmission and distribution cooperative dispatching method and system in a power market environment, relating to the technical filed of power market. The method includes: power grid transmission and distribution data are collected, and economic dispatching modeling is carried out on a hybrid system containing hydro-thermal power; linearization processing is carried out on nonlinear terms in the model; and accelerated solving is carried out on the model by adopting Benders decomposition, so that power gird transmission and distribution cooperative dispatching is optimized. The integration capacity of the power system containing hydro-thermal power to the renewable energy is enhanced, and the utilization efficiency of resources is improved, and the solving process is simplified in the present invention.

Abstract: Disclosed is a method and system for quickly identifying and responding weak point-associated power flow based on a sensitivity factor, relating to the technical field of dispatching automation of power system. The method includes: parameter data is acquired, and a transfer factor (SF) matrix is established; consumption and accommodation of new energy of a power distribution network is evaluated, and a line with power flow exceeding a limit is evaluated; and flexible load in the power distribution network is dispatched based on the sensitivity factor, and safety verification is carried out on the result. The present invention identifies a blocking line of the power distribution network, the situation of out of limit of the line is eliminated, so that the safety of the power gird is ensured, and the new energy is consumed and accommodated.

Abstract: The invention discloses a power feedback control system and method of MGP system, including detecting the actual active power sent by the generator to the grid through the measurement and calculation module; making a difference between the measured active power and the given active power; calculating frequency regulation amount through the PI regulation module according to the difference, and taking it as feedback; calculating the frequency reference value of the converter in the control system; through the adjustment module adjusts finely the frequency of the converter and adjust the phase difference of frequency modulation to achieve controlling power output, so when the new energy predicts its output power based on power feedback control using MGP before connecting to grid, the output of the control system will not delay and affect the stability and reliability of the control system, ensuring the smooth introduction of new energy grid-connected methods.

Abstract: The invention discloses a method for MGP new energy grid-connected control, wherein, the synchronous motor is connected to a synchronous generator; the new energy module drives the synchronous motor to rotate through a frequency converter; the frequency converter controls the power transmission; and the synchronous motor drives the synchronous generator for grid connection. The present invention has the beneficial effects that: the control method and system provided by the invention can improve the stability and reliability of the grid.

Abstract: The invention discloses a power feedback control system and method of MGP system, including detecting the actual active power delivered by the generator to the grid through the measurement and calculation module; making a difference between the measured active power and the given active power; calculating the frequency regulation amount through the PI regulation module according to the difference, and taking it as feedback; calculating the frequency reference value of the converter in the control system; and fine tuning the frequency of the converter through the PI regulation module; regulating the phase difference through frequency modulation; realizing the goal of controlling the power output, so that when predicting the output power of new energy before MGP is connected to the grid based on power feedback control, the output of the control system will not be delayed and the defects that affect the stability and reliability of the control system will not appear, to ensure the successful introduction of new

Abstract: The invention discloses a method for MGP new energy grid-connected control, wherein, the synchronous motor is connected to a synchronous generator; the new energy module drives the synchronous motor to rotate through a frequency converter; the frequency converter controls the power transmission; and the synchronous motor drives the synchronous generator for grid connection. The present invention has the beneficial effects that: the control method and system provided by the invention can improve the stability and reliability of the grid.