Real-time reactive power-voltage control method for active distribution network considering discrete control variables

Abstract

The invention relates to an active power distributing network real-time reactive power-voltage control method considering a discrete control variable, which belongs to the technical field of electric power system operation and control. The method provides a trend equation capable of processing the branch form of a three-phase active power distributing network, takes the operation characteristics of a distributed power supply, a continuous reactive power compensating device and a discrete reactive power compensating device into consideration, and establishes an active power distributing network real-time reactive power-voltage control object function comprising the discrete control variable, and then a second-order cone loosening technology is adopted for equivalently transforming the above problems, so that the solving efficiency of the reactive power-voltage control problem is improved. Finally, a second-order cone planning method is adopted for solving the real-time reactive power control values of the continuous reactive power compensating device and the discrete reactive power compensating device, so that the active power distributing network real-time reactive power-voltage control method considering the discrete control variable is realized. The method adopts a branch trend model conforming to the operation characteristics of an active power distributing network and then adopts the second-order cone loosening technology for processing the trend equation, so that the calculating efficiency is high, and the control effect is good.

Description

technical field [0001] The invention relates to a real-time reactive power-voltage control method of an active distribution network considering discrete control variables, and belongs to the technical field of power system operation and control. Background technique [0002] In recent years, the penetration rate of distributed generation (Distributed Generation, DG), energy storage devices and reactive power compensation devices in the distribution network has gradually increased, and the traditional distribution network has gradually become an adjustable and controllable active distribution network. In the daily management of the power grid, the real-time reactive power-voltage control problem aimed at reducing the active power loss of the active distribution network is an important part of improving the level of distribution network automation. [0003] However, the introduction of many controllable sources has brought many unprecedented challenges to the operation of dist...

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Problems solved by technology

[0004] In addition, electric vehicles, electric arc furnaces, and non-full-phase grid-connected distributed power sources and other asymmetrical equipment are increasing, which makes the inherent characteristics of the distribution network such as unbalanced three-phase loads, asymmetrical line parameters, and non-decoupling of active and reactive power. It is becoming more and more obvious. If the single-phase model is still used for calculation, a large error will be introduced

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