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 method for constructing an optimal scheduling model of an integrated energy system considering virtual thermal storage, which relates to the technical field of electric power systems. The method includes: establishing an operation model of an apparatus, a demand response model of an energy load, a charging model of an electric vehicle, and an energy flow model of a heat supply network of the virtual thermal storage in the integrated energy system; processing, according to a second-order cone relaxation method, a direct current power flow model of a power distribution network, and constructing the optimal scheduling model of the integrated energy system by taking minimization of total cost of an energy operator as an objective, thereby coordinately and optimally scheduling a plurality of energy sources.

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 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 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: Disclosed are a method and system based on improved alternating direction method of multipliers (ADMM) for distributed coordinated restoration of a transmission and distribution grid. The method includes: establishing an optimization model of maximizing a load restoration yield, and introducing and solving an augmented Lagrangian function; accelerating solutions by using an improved alternating direction method of multipliers and a dual updating iteration accelerating strategy; and determining a coordinated restoration strategy according to convergence conditions or a number of iterations. According to the present disclosure, efficient solving of distributed coordinated restoration of transmission and distribution grid is implemented, economic losses are reduced, and computation complexity and communication burden are further reduced.

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.