Voltage regulation method and device for radial power distribution network

A technology for voltage regulation and distribution network, applied in the direction of AC network voltage regulation, circuit devices, electrical components, etc., can solve the problem of frequent fluctuations in voltage that cannot adapt to the high penetration rate of renewable energy

CN112531723AInactive Publication Date: 2021-03-19HUAZHONG UNIV OF SCI & TECH +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2021-03-19
Estimated Expiration
Not applicable · inactive patent

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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.
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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...

Examples

Embodiment Construction

[0044] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0045] figure 1 It is a flowchart of a voltage regulation method for a radial distribution network in an embodiment of the present invention; figure 1 As shown, the voltage regulation method of the radial distribution network provided by the present invention includes: step S1 to step S3.

[0046] S1: Use the mathematical programming model to establish the voltage regulation model of the en...