Reactive power and voltage coordination control method adapted to cluster wind and photovoltaic access system

A technology of access to the system and coordinated control, applied in the direction of AC network voltage adjustment, reactive power compensation, photovoltaic power generation, etc., can solve problems such as weak controllability, lack of controllability, system safety accidents, etc., and achieve the effect of realizing the whole network voltage

CN106451477BActive Publication Date: 2019-02-12ECONOMIC RES INST OF STATE GRID GANSU ELECTRIC POWER +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2019-02-12

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Abstract

The invention discloses a reactive power voltage coordination control method adaptable to a clustered wind-solar-electricity access system. A power grid serves as the highest level control layer, a power grid level control station selects a reactive power optimization mode or voltage control mode according to weak sending end voltage, a cluster level serves as a second highest level control layer, corresponding model calculation is performed according to a superior control command, a control objective is proposed to an inferior station, a terminal serves as a control layer and also an executive layer, local control is performed and action of an inferior wind generation set or a photovoltaic module is selected according to the control objective proposed by a superior station, the wind generation set / photovoltaic module is an executive layer, and reactive power adjusting action is executed according to the superior control command. The outstanding problem of complicated reactive power voltage of the clustered wind-solar-electricity access system in the prior art is solved, full-network voltage safe and stable operation is realized, and wind-solar-electricity capacity is maximized as much as possible.
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Description

technical field

[0001] The present invention relates to the technical field of a reactive power voltage control strategy analysis method for a cluster wind power access system, in particular to a reactive voltage coordinated control method adapted to a cluster wind power access system. Background technique

[0002] my country's new energy development generally has the characteristics of cluster development, weak grid access, and long-distance transmission. New energy has strong volatility and weak controllability. Centralized access areas often lack conventional power supply support, and reactive power and voltage problems are prominent, which can easily induce system safety accidents. Contents of the invention

[0003] The purpose of the present invention is to address the above problems and propose a reactive power and voltage coordinated control method adapted to the cluster wind power access system, so as to realize the enhanced controllability of the complex reactive ...

Examples

Embodiment Construction

[0022] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0023] Grid-connected wind power clusters pose new challenges to reactive power and voltage control. The present invention proposes a reactive power and voltage coordinated control strategy of the airport-field-group-network by analyzing the characteristics of cluster development, weak grid access and long-distance transmission that are common in my country's new energy development. This control strategy is based on the idea of ​​"multi-level coordination and level-by-level refinement". The strategy is divided into four levels of machine, field, group, and network control strategies. The grid level is the highest level of control. Each level of control station receiv...