Dynamic coordination control method and device for AVC and SVG of new energy pooling station

A technology of dynamic coordination and control method, applied in the direction of circuit device, system integration technology, reactive power adjustment/elimination/compensation, etc., can solve the problem of reducing multiple reactive power, system voltage drop, and difficulty in fully utilizing SVG dynamic reactive power response capability and other issues to achieve the effect of improving efficiency and increasing power limit

CN114389283APending Publication Date: 2022-04-22NORTH CHINA ELECTRICAL POWER RES INST +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2022-04-22

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Abstract

The embodiment of the invention provides a new energy pooling station AVC and SVG dynamic coordination control method and device, and is applied to an SVG master control unit connected between an AVC system and a fixed capacitor in a new energy pooling station, and the method comprises the steps: judging the transient and steady state of a current system according to the upper and lower limit values of the voltage issued by the AVC system; if it is judged that the current system is in a steady state, reactive power distribution is carried out on the fixed capacitor and the SVG according to a reactive power instruction issued by the AVC system and a preset coordination control rule; if the current system is judged to be in the transient state, switching the SVG to local constant voltage control, and executing overload exception processing according to the SVG control point voltage and current and a preset main ring auxiliary control rule; according to the invention, the power limit of the new energy collection area can be effectively improved.
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Description

technical field

[0001] This application relates to the field of energy management, in particular to a method and device for dynamic coordinated control of AVC and SVG in a new energy gathering station. Background technique

[0002] Due to the strong volatility of new energy, it is difficult to balance the reactive power and voltage, and the new energy power generation equipment provides little or no reactive power, the voltage of the access point is often low, which greatly restricts the ability to send new energy. Therefore, reactive power compensation equipment is widely used in new energy sources and plays an important role in reactive power and voltage balance.

[0003] Generally speaking, new energy collection stations are equipped with fixed-capacity reactive power compensation equipment, such as capacitors and continuously adjustable reactive power compensation equipment static var generator (SVG). Fixed capacitors are low in cost, but due to the limited application ...

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Embodiment Construction

[0060] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

[0061] Considering the communication speed of the AVC system and the power flow calculation speed of the large power grid, the AVC master station usually sends instructions to the AVC sub-station every 5 minutes, and the AVC sub-station usually sends instructions to the SVG in seconds, which greatly limits the SVG Millisecond-level control responsiveness. At ...