Reactive power optimization method and device of power distribution network

Abstract

The invention relates to a reactive power optimization method and device of a power distribution network. The method comprises the steps of acquiring a reactive power of each node from historical data at a historical moment i; determining a reactive power mean vector of each node at the historical moment i according to the reactive power of each node at the historical moment i; and determining a reactive power compensation quantity vector of each node at the historical moment i according to covariance between the reactive power mean vector of each node at the historical moment i and reactive power vectors of each node from the historical data at other historical moments. According to the technical scheme provided by the invention, a power grid is optimized in real time by a large amount of historical data of the power distribution network, the historical data of the nodes of the power distribution network form a big-data random matrix architecture, a reactive power compensation result is obtained by analyzing the covariance of the matrix, and with increase of data quantity, the analysis operation of the system is more accurate and efficient and is simplified.

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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