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Combined method for regulating power-supply system frequency and active power

A technology of active power and power system, which is applied in the field of joint control of power system frequency and active power

Inactive Publication Date: 2007-09-05
曹保定
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The large-scale power outages in some countries cannot but make us consider the drawbacks of this highly centralized control method

Method used

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  • Combined method for regulating power-supply system frequency and active power
  • Combined method for regulating power-supply system frequency and active power
  • Combined method for regulating power-supply system frequency and active power

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0057] (1) Combine the frequency f of the power station or unit bus with the set value f of the power system frequency R Perform comparison to obtain the bus frequency deviation Δf of the power station or unit at time t t = F t -f R ;

[0058] (2) This deviation value Δf t The filter and prediction unit of the computer monitoring system is processed by the mathematical method of wavelet decomposition to obtain F * -----Δf of time series length l i Sequence, the measured and predicted value of the bus frequency deviation obtained by the wavelet filtering-prediction processing; the time-frequency scale used in the wavelet filtering-prediction should conform to the dynamic response capability of the unit of the power station;

[0059] (3) The power station and unit control range decision unit is based on the above calculation F * -Value: Determine the total (increase) amount of active power that the power station or unit should perform at this time according to the provisions of the ...

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Abstract

The invention is concerned with adjustment and control method for frequency and active power to the power system. It is a dynamic correspond method to adjust and control each power plant or unit on the spot under the uniform direct to control station for frequency and active power to whole power system. Install filter to test frequency on power plant or unit, then each power plant unit with different dynamic nature selects suitable control frequency segment according itself characteristic and ability. Thus the quick corresponsive unit answers the higher parts of frequency segment in the frequency change, while the slow corresponsive unit answers the lower parts of frequency segment in the frequency change. It realizes the dynamic correspond, and the control stations give scheduled load propose curve to each power plant or unit. And each power plant or unit can carry the adjustment and control method for frequency and active power on the spot according to the change of system frequency in the scheming range.

Description

Technical field [0001] The invention belongs to a power system control method, and particularly relates to a power system frequency and active power joint control method. Background technique [0002] As we all know, the power system formed for the production, transmission, and distribution of electricity converts all kinds of energy available to people into electric energy that is convenient for transmission and use, and transmits and provides it to all walks of life. It has reached hundreds of millions. The family has a close connection with people's lives. It greatly facilitates the development of production technology in all walks of life and improves people's quality of life. It has a great impact on social production and life, and has been highly valued by various countries. [0003] Due to the above-mentioned characteristics, the current power systems in various countries are supported by a wide variety of different types of power stations. Among them are thermal power sta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02J3/38H02P9/04G06Q50/00G06Q50/06
Inventor 曹保定
Owner 曹保定
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