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

Abstract

The invention discloses a distribution network reactive power optimization method for photovoltaic reactive power partition pricing, which includes proposing a controllable photovoltaic reactive power partition pricing model, with the minimum reactive power comprehensive cost, the minimum active network loss and voltage deviation as the optimization target, Construct active-reactive power optimization model of distribution network including response to PV inverter reactive power partition price, static var compensator SVC dynamic compensation, on-load voltage regulation equipment OLTC tap and capacitor bank switching; adopt second-order cone programming The nonlinear terms in the model are processed by mathematical methods such as the large M method, and finally a mixed integer second-order cone programming model for the coordinated optimization of active and reactive power of the distribution network with controllable photovoltaics under the power market environment is obtained, and the Bund The Sri Lankan decomposition method solves the model segmentation. The invention rationally and coordinately utilizes the reactive power capacity of the photovoltaic inverter and the reactive power support capability of the original discrete equipment of the distribution network, reduces active power network loss, and ensures user voltage quality.

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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