A reactive power optimization method and device for distribution network

Abstract

The present invention relates to a reactive power optimization method and device for a distribution network. The method includes: obtaining the reactive power of each node at historical time i in historical data; determining the historical time i according to the reactive power of each node at historical time i The reactive power mean value vector of each node; Utilize the reactive power mean value vector of each node at the historical moment i and the covariance of the reactive power vectors of each node at other historical moments in the historical data to determine the reactive power compensation of each node at the current moment i Quantity vector; the technical scheme provided by the present invention uses a large amount of historical data of the distribution network to optimize the power grid in real time, constructs a large data random matrix structure from the historical data of distribution network nodes, and obtains reactive power by analyzing the covariance of the matrix. As a result of the compensation, as the amount of data increases, the system analysis operation is more accurate, simplified and efficient.

Description

technical field [0001] The invention relates to the field of reactive power optimization of distribution networks, in particular to a method and device for reactive power optimization of distribution networks. Background technique [0002] Most of the active power sources in the power system are concentrated in various power plants. In addition to generators, reactive power sources also include capacitors and various static var compensation equipment, which are scattered in various substations. Supplying active power and electric energy must consume energy, but once the reactive power supply is set up, it can be used at any time. The reactive power consumption in the system is much greater than the active power consumption. The reactive power loss mainly includes reactive power load, transformer reactive power loss and Power line reactive power loss. The operation or design department of the power system generally compiles the reactive power balance table or the voltage cur...

AI Technical Summary

Problems solved by technology

With the complex network structure and many parameters of the distribution network, the calculation complexity of the point selection method is increased. On the other hand, a large amount of historical data in the distribution network is easy to be ignored and cannot be effectively used in reactive power optimization.

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