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Method for comprehensively controlling reactive voltage of wind farm with imported prediction method

A voltage control method and a technology for forecasting information, applied in wind power generation, AC network voltage adjustment, reactive power adjustment/elimination/compensation, etc., can solve the coordination of wind farm operation economy with a single time scale and without considering the safety of the power grid and other issues to achieve the effect of strong reliability

Active Publication Date: 2012-07-25
TSINGHUA UNIV
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Problems solved by technology

The time scale targeted is also relatively single, without considering the coordination of the security of the power grid, wind farms, wind turbines, etc. and the economics of wind farm operation

Method used

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  • Method for comprehensively controlling reactive voltage of wind farm with imported prediction method
  • Method for comprehensively controlling reactive voltage of wind farm with imported prediction method
  • Method for comprehensively controlling reactive voltage of wind farm with imported prediction method

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Embodiment Construction

[0078] The present invention will be described in detail below in conjunction with the embodiments.

[0079] At present, most domestic wind farm substations, wind turbines, and SVC / STATCOM have a set of data acquisition and control systems based on different communication protocols. The communication structure is as follows: figure 1 shown. The integrated reactive power and voltage control system of the wind farm realizes the reactive power management and voltage control of the wind farm through communication with the grid dispatching, the wind farm power forecasting system and the monitoring system of each reactive device in the wind farm. The integrated reactive power and voltage control system of the wind farm realizes the communication and control with the on-load tap changer transformer and the capacitor / reactor group through the substation SCADA, realizes the communication and control with each wind turbine through the fan SCADA, realizes the communication and control wi...

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Abstract

A method for comprehensively controlling reactive voltage of a wind farm with imported prediction information includes a planning mode, an online mode and an emergency mode. An operation plan of a power grid and power prediction information of the wind farm are imported in the planning mode, safety of the power grid, safety of the wind farm, safety of wind turbines and economical efficiency of the wind farm are comprehensively considered, and a control scheme for scattering and regulating equipment is formulated in advance; the safety of the power grid, the safety of the wind farm, the safety of the wind turbines and the economical efficiency of the wind farm are comprehensively considered on the basis of control of scattering and regulating of the equipment in the online mode, and the regulating quantity for continuously regulating the equipment is computed; and disturbance duration is extremely short during actual operation in the emergency mode, various reactive compensation devices cannot be easily communicated with a comprehensive reactive voltage control system of the wind farm and cannot be controlled by the comprehensive reactive voltage control system of the wind farm, and accordingly, the various reactive compensation devices are reactively locally controlled in the emergency mode in the design. The method has the advantages of robustness in control and high reliability.

Description

technical field [0001] The invention belongs to the technical field of safe and economical operation and control of grid-connected wind farms, and in particular relates to a wind farm comprehensive reactive voltage control method that introduces prediction information. Background technique [0002] The characteristics of domestic wind power cluster development, access to weak power grids, and long-distance transmission make the problem of reactive power and voltage very prominent. At present, a large number of various types of reactive power adjustment devices are installed in various wind farms, but the on-site operation shows that sufficient reactive power adjustment devices have not effectively solved the problem of low voltage and power factor pass rates of wind farms. [0003] Regarding the research on reactive power and voltage control of wind farms, many scholars at home and abroad have proposed to use the reactive power adjustment capability of doubly-fed wind turbin...

Claims

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Application Information

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IPC IPC(8): H02J3/18H02J3/46H02J3/12
CPCY02E10/763Y02E40/16Y02E40/12Y02E10/76Y02E40/10
Inventor 乔颖陈惠粉鲁宗相张毅威
Owner TSINGHUA UNIV
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