Method and system for coordinately controlling reactive voltage of wind power plant

一种风电场、站控系统的技术，应用在柔性交流输电系统、风能发电、无功补偿等方向，能够解决影响经济性等问题

Active Publication Date: 2020-04-07
CHINA ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

SVG consumes a large amount of factory power during work, which affects the economy, and in areas where a large number of new energy sources are connected to the grid, the simultaneous use of SVG actions at multiple grid-connected points will also bring about the coordination of dynamic voltage support.

Method used

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Embodiment Construction

[0101] Exemplary embodiments of the present invention will now be described with reference to the drawings; however, the present invention may be embodied in many different forms and are not limited to the embodiments described herein, which are provided for the purpose of exhaustively and completely disclosing the present invention. invention and fully convey the scope of the invention to those skilled in the art. The terms used in the exemplary embodiments shown in the drawings do not limit the present invention. In the figures, the same units / elements are given the same reference numerals.

[0102] Unless otherwise specified, the terms (including scientific and technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it can be understood that terms defined by commonly used dictionaries should be understood to have consistent meanings in the context of their related fields, and should not be understood as idealized or over...

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PUM

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Abstract

The invention provides a method and a system for coordinately controlling a reactive voltage of a wind power plant. The method and system measure the grid-connected point voltage of a wind power plantand the voltage of a wind turbine generator in the wind power plant, the measured value is compared with a preset first threshold value interval of normal work, when the grid-connected point voltageof the wind power plant suddenly rises / falls in a normal working interval, voltage optimal value adjustment is carried out to coordinate reactive power distribution between the SVG and an in-field wind turbine generator, and when the grid-connected point voltage and the generator terminal voltage of the wind power plant exceed a first threshold interval, the SVG and the in-field wind turbine generator enter an emergency closed-loop control mode to carry out reactive power adjustment respectively. According to the method and the system, the reactive power distribution between the SVG and the wind turbine generator in the wind power plant is coordinated when the grid-connected point voltage of the wind power plant is transiently increased / decreased suddenly, so that the transient reactive power support capacity of the wind power plant is better improved when the voltage of the grid-connected point of the wind power plant is transiently increased / decreased suddenly.

Description

technical field [0001] The present invention relates to the field of electric power control, and more specifically, relates to a method and system for coordinated control of wind farm reactive voltage. Background technique [0002] As one of the most mature and promising renewable energy sources, photovoltaic power generation has maintained a strong momentum of development in recent years. In the near future, the proportion of new energy in some local power grids may reach 80% or even higher. Grid-connected operation of new energy sources will become an important feature of the future power structure. [0003] However, as the proportion of new energy in the power grid is getting higher and higher, its influence on the power grid is also gradually expanding from the local area. The output of new energy units has obvious intermittency and volatility, which makes the large-scale integration of photovoltaic power generation put great pressure on the stable operation of local po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/18H02J3/38H02J3/50
CPCH02J3/1835H02J3/50Y02E40/30
Inventor 孙华东李文锋卜广全许涛于钊陶向宇魏巍王官宏贾媛李莹张健
Owner CHINA ELECTRIC POWER RES INST
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