Power grid inherent structural characteristic-based power distribution network optimal reactive compensation method

Abstract

The invention discloses a power grid inherent structural characteristic-based power distribution network optimal reactive compensation method. The method includes the following steps that: a subsystem is divided with reactive power compensation nodes adopted as decomposition points according to local reactive power balancing principles, and reactive power compensation capacity is determined in the subsystem based on inherent structural characteristics of a power grid, and therefore, optimal compensation of the operation of a system can be determined; with the reactive power compensation capacity limited, a heuristic type push-back algorithm is adopted to perform correction and compensation according to a situation whether the sum of node types of the system is vacant; and load flow is calculated, and according to the calculated load flow or current load flow measurement, and based on a characteristic that structural adjustment of the power rid is carried out so as to adapt to the source flow of the system, simplification is performed, and full-grid reactive power compensation optimization with minimum grid loss as a goal can be realized, and a solution space is traversed, so that a compensation scheme can be determined. The power grid inherent structural characteristic-based power distribution network optimal reactive compensation method of the invention can be applied to distribution network capacitor fast optimal decision making, and play an important role in power distribution network optimal reactive power compensation, and provide technical support for intelligent development of the power distribution system.

Description

technical field [0001] The invention relates to the field of power system distribution network regulation and control, in particular to an optimal reactive power compensation method for a distribution network based on the inherent structural characteristics of the distribution network, which is used for loss reduction and voltage optimization control of the distribution network. Background technique [0002] Reactive power compensation in distribution network is an effective and economical means to reduce the network loss of distribution system and increase the voltage level of power grid. Reasonable reactive power compensation can not only provide power users with high-quality electric energy, but also play a role in improving the efficiency of power grid operation. positive effects. From the perspective of electrical characteristics, the purpose of reactive power compensation is to achieve local balance of reactive power. The optimal reactive power compensation problem of...

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Problems solved by technology

[0003] The Chinese patent with the patent number CN200810225549: "A reactive power optimization method suitable for online applications" discloses a reactive power optimization method suitable for automatic voltage control systems. The combined solution method of the reactive power optimization problem of the tabu search method, but its calculation conditions are relatively harsh, it is highly dependent on the accuracy of the grid data, the calculation effect is not robust, and it is very sensitive to the initial value, and it is easy to fall into the local optimal solution Not enough

The Chinese patent with the patent number CN201010595336: "A Reactive Power Compensation Optimization Method for 10kV Distribution Network in Electric Power System" provides a reactive power compensation optimization method for 10kV distribution network. The patent aims at minimizing network loss , optimize the reactive power compensation capacity of 10kV distribution network through genetic algorithm, but it has the disadvantages of long calculation time, easy to fall into dimension disaster, etc., and it is difficult to meet the actual requirements of the project

The Chinese patent with the patent number CN102170137A: "A method for reactive power optimization of power system distribution network" provides a differential evolution algorithm and artificial bee colony algorithm for solving reactive power optimization problems of power system distribution network Hybrid optimization method, this method has the advantages of simple operation and high robustness, but it has the disadvantages of long calculation time and easy to fall into the curse of dimensionality, which is difficult to meet the actual requirements of the project

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