Voltage regulation method and device for radial power distribution network

Abstract

The invention discloses a voltage regulation method and device for a radial power distribution network, and belongs to the field of power systems, and the method comprises the steps: building a voltage regulation model of the whole radial power distribution network through a mathematical programming model, and setting a voltage regulation target according to the electric power physical principle of the power distribution network, wherein the voltage regulation target comprises obtaining a minimum reactive power output cost function and a minimum reactive power deviation penalty; decomposing the task according to the structure based on a voltage regulation module to obtain a sub-problem, solving the sub-problem by using an interior point method, and implementing the solution of the sub-problem; and establishing a random asynchronous optimization mechanism to optimize the sub-problems and start calculation of each node, wherein the calculation result of each node is used for updating reactive power injection of the distributed generator set on the scheduling bus so as to perform voltage regulation on the radial power distribution network. The voltage regulation method is low in costand can enhance the robustness of the voltage of the power distribution network, so that the change of the topological structure of the power distribution network has toughness and the voltage regulation range is wider.

Description

technical field [0001] The invention belongs to the field of power systems, and more specifically relates to a voltage regulation method and device for a radial distribution network. Background technique [0002] Voltage is the most important physical quantity of the power system. In order to prevent the voltage instability of the distribution network, various means will be used to adjust the voltage, such as adjusting the transformer tap, switching shunt capacitors and so on. [0003] The adaptive voltage and reactive power control method in the active distribution network disclosed in the prior art can adaptively select centralized or distributed voltage and reactive power control. The above-mentioned control schemes often adopt traditional regulating transformer taps or switching shunt capacitors. However, as the penetration rate of renewable energy in the distribution network continues to increase, the equipment investment required by traditional voltage regulation meth...

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Problems solved by technology

[0004] In view of the above defects or improvement needs of the prior art, the present invention provides a voltage regulation method and device for a radial distribution network, the purpose of which is to overcome the frequent voltage fluctuations caused by the inability of traditional voltage regulation devices to adapt to the high penetration rate of renewable energy The technical problems of defects, making it resilient to changes in the topology of the distribution network and a wider range of voltage regulation

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