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Reactive power voltage coordination control method adaptable to clustered wind-solar-electricity access system

A technology of access system and coordinated control, applied in AC network voltage adjustment, photovoltaic power generation, reactive power compensation, etc. Effect

Active Publication Date: 2017-02-22
ECONOMIC RES INST OF STATE GRID GANSU ELECTRIC POWER +2
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Problems solved by technology

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

Method used

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  • Reactive power voltage coordination control method adaptable to clustered wind-solar-electricity access system
  • Reactive power voltage coordination control method adaptable to clustered wind-solar-electricity access system
  • Reactive power voltage coordination control method adaptable to clustered wind-solar-electricity access system

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Embodiment Construction

[0022] The preferred embodiments of the present invention will be described below with reference to 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 used to limit the present invention.

[0023] The grid connection of wind photovoltaic clusters poses new challenges for reactive voltage control. By analyzing the characteristics of cluster development, weak grid access, and long-distance transmission that are commonly found in my country's new energy development, the present invention proposes a reactive power voltage coordinated control strategy of machine-farm-group-network. This control strategy is based on the idea of ​​"multi-level coordination and step-by-step refinement". The strategy is divided into four levels of control strategies: machine, field, group, and network. The grid level is the highest level of control, and each level of control station acce...

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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.

Description

Technical field [0001] The invention relates to the technical field of a reactive voltage control strategy analysis method for a cluster wind photovoltaic access system, and specifically relates to a reactive voltage coordinated control method adapted to the cluster wind photovoltaic access system. Background technique [0002] my country's new energy development generally has the characteristics of cluster development, weak grid access, and long-distance delivery. New energy has strong volatility and weak controllability. Centralized access areas often lack conventional power support. The problem of reactive power and voltage is prominent, which can easily induce system safety accidents. Summary of the invention [0003] The purpose of the present invention is to solve the above problems and propose a reactive voltage coordinated control method adapted to the cluster wind photoelectric access system, so as to realize the complex reactive voltage controllability enhancement of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/16H02J3/38
CPCH02J3/16H02J3/382Y02E10/56Y02E40/30
Inventor 孙亚璐付兵彬徐昊亮田云飞陈兆雁余泳靳攀润张海生刘正英王仕俊夏懿张中丹宋汶秦贾春蓉杨昌海杨晶雒亿平万小花王鑫
Owner ECONOMIC RES INST OF STATE GRID GANSU ELECTRIC POWER
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