Power grid frequency situation on-line forecast method considering wind power and demand-side response

A demand-side response and power grid frequency technology, applied in wind power generation, power transmission AC network, circuit devices, etc., can solve the problems of weak power system frequency prediction ability and low power grid frequency situation prediction accuracy, and improve power system frequency prediction The ability to improve the effect of precision

Inactive Publication Date: 2018-04-27
CENT CHINA BRANCH OF STATE GRID CORP OF CHINA +1
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Problems solved by technology

[0003] The purpose of the present invention is to overcome the defects and problems of low power grid frequency situation prediction accuracy and weak power system frequency prediction ability in the prior art, and provide a wind power and power system with high power grid frequency situation prediction accuracy and strong power system frequency prediction ability. On-line prediction method of power grid frequency situation based on demand-side response

Method used

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  • Power grid frequency situation on-line forecast method considering wind power and demand-side response
  • Power grid frequency situation on-line forecast method considering wind power and demand-side response
  • Power grid frequency situation on-line forecast method considering wind power and demand-side response

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Embodiment

[0067] see figure 1 , figure 2 , an online grid frequency situation prediction method considering wind power and demand side response, the method includes the following steps:

[0068] a. Real-time monitoring of the operating status of the power system to determine whether there is a power shortage in the power system;

[0069] b. If there is no power shortage in the power system, then return to step a to continue monitoring; if there is a power shortage in the power system, then enter step c;

[0070] c. Collect equipment information and operating status information of thermal power units and wind power units in the power system;

[0071] The equipment information and operating state information of the thermal power unit and the wind power unit include: the inertia time constant H of the i-th thermal power unit i , damping constant D i , mechanical power gain K mi , Turbine time constant T Ri , primary frequency modulation coefficient R i ; The virtual inertia coeffic...

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Abstract

The invention relates to a power grid frequency situation on-line forecast method considering wind power and demand-side response. According to the method, the development effects of a thermal power generation unit, a wind power generation unit and demand-side response in the frequency response process of a system are comprehensively considered, a power grid frequency situation forecast polymerization model for frequency modulation by the thermal power generation unit, the wind power generation unit and the demand-side response in a combination way is built by on-line acquisition of equipmentinformation and running state information of the thermal power generation unit and the wind power generation unit in a power system, parameter setting is performed, and finally, a power grid frequencysituation on-line forecast result under a corresponding running working condition is obtained by simulation calculation on the built power grid frequency situation forecast polymerization model or according to a time domain expression obtained by deviation of the power grid frequency situation forecast polymerization model. By the design, the power grid frequency situation forecast accuracy is improved, and moreover, the frequency forecast capability of the power system is improved.

Description

technical field [0001] The invention relates to the technical field of power system situation awareness and trend prediction, in particular to an online grid frequency situation prediction method considering wind power and demand side response, which is mainly applicable to improving the power grid frequency situation prediction accuracy and power system frequency prediction capability. Background technique [0002] In recent years, the penetration rate of wind power in the power grid is increasing year by year, and the impact of large-scale wind power access on the stability of the power grid is becoming more and more obvious. Traditional research believes that wind turbines are mostly controlled by power electronic equipment, and are decoupled from the power grid with power electronic converters, so they do not affect the frequency change of the system, and because wind turbines do not show inertia like traditional thermal power plants, Therefore, with the increase of wind...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/46H02J3/34
CPCH02J3/34H02J3/46H02J2203/20Y02E10/76
Inventor 党杰徐友平李锴李文锋邵德军潘晓杰艾东平姜文立马世俊张三洪
Owner CENT CHINA BRANCH OF STATE GRID CORP OF CHINA
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