Reactive power optimization method for photovoltaic reactive power partition pricing power distribution network

Abstract

The invention discloses a reactive power optimization method for a photovoltaic reactive power partition pricing power distribution network, and the method comprises the steps: proposing a controllable photovoltaic reactive power partition pricing model, taking the minimum reactive comprehensive cost and the minimum deviation between active power loss and voltage as optimization targets, and constructing a power distribution network active-reactive power optimization model including response PV inverter reactive partition electricity price, static Var compensator (SVC) dynamic compensation, on-load voltage regulation equipment OLTC tap and capacitor bank switching; and processing nonlinear terms in the model by adopting mathematical means such as second-order cone programming and a large Mmethod, finally obtaining a mixed integer second-order cone programming model of active-reactive coordination optimization of the power distribution network containing controllable photovoltaic in the power market environment, and segmenting and solving the model by adopting a Benders decomposition method. According to the invention, the reactive capacity of a photovoltaic inverter and the reactive support capability of original discrete equipment of a distribution network are reasonably and coordinately utilized, the active power loss is reduced, and the user voltage quality is ensured.

Description

technical field [0001] The invention belongs to the field of reactive power optimization of a distribution network including photovoltaic power stations, and in particular relates to a reactive power optimization method of a distribution network with photovoltaic reactive power partition pricing. Background technique [0002] The active and reactive power of the photovoltaic inverter is decoupled and controlled, so that the inverter can dynamically send / absorb reactive power according to the grid demand and then adjust the voltage. However, continuous operation under this strategy will cause the inverter to overheat and increase the leakage current. It is not conducive to the stable operation of the grid-connected system. Using the Optimal Inverter Dispatch (OID) strategy can reduce the amount of abandoned light and improve system stability, but the lack of a detailed reactive power partition control strategy in operation is not conducive to the active development of the rea...

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Problems solved by technology

[0005] The purpose of the present invention is to aim at the aspect of reactive power optimization of the distribution network after the controllable photovoltaic is connected to the distribution network in the existing method, and the reactive power output capability of the photovoltaic inverter is used for active-reactive joint optimization without reasonable consideration. and the current reactive power control cannot meet the user's reactive power demand and system voltage stability requirements, and the utilization rate of hardware resources needs to be improved. A reactive power optimization method for distribution network with photovoltaic reactive power partition pricing is proposed.

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