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Call wire random power fluctuation calculating method based on load fluctuation characteristic

A technology of load fluctuation and power fluctuation, applied in the field of measurement and calculation, which can solve the problems of failure to propose random power fluctuations of tie lines and unclear conclusions.

Inactive Publication Date: 2013-05-08
WUHAN UNIV +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the conclusion is not clear, and a specific method for measuring the random power fluctuation of the tie line through the load fluctuation characteristics cannot be proposed.

Method used

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  • Call wire random power fluctuation calculating method based on load fluctuation characteristic
  • Call wire random power fluctuation calculating method based on load fluctuation characteristic
  • Call wire random power fluctuation calculating method based on load fluctuation characteristic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0052] Step 1: Establish a mathematical correlation model between load fluctuations and tie-line random power fluctuations.

[0053] 1) Dynamic differential analysis of tie line power fluctuation

[0054] A power system in which two areas are connected by tie lines, such as the attached figure 1 As shown, power shocks in any system will reflect power oscillations in the tie line. This kind of random impact occurs continuously in the normal operation of the power system, and each impact will be accompanied by the two systems from steady state to unit swing, power regulation, energy redistribution, and finally reach a new steady state process. These processes are reflected in the tie-line as power fluctuations superimposed on the tie-line power flow planned for transmission.

[0055] In order to facilitate the study of the random fluctuation of tie line power in this two-area interconnection system, the two-area interconnection system can be simplified as figure 2 A two-mach...

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Abstract

The invention relates to a call wire random power fluctuation calculating method based on a load fluctuation characteristic. First, a correlation model of load fluctuation and call wire random power fluctuation is established, the correlation model of load fluctuation and call wire random power fluctuation is deduced and analyzed in a detailed mode according to dynamic differential analysis of call wire power fluctuation, system frequency response analysis, call wire power fluctuation analysis based on system frequency analysis and call wire fluctuation analysis based on the load fluctuation characteristic. Two zone frequency response coefficients and corresponding weight coefficients are acquired, two zone load distributions f (x) and f (y) are acquired according to practical operation data, Monte Carlo sampling simulating test is carried out according to the distributions, results are subjected to statistics and analysis, and then call wire random power fluctuation conditions are calculated. The method is high in reliability, accurate and efficient, and powerful support can be provided for quick restraining of call wire random power fluctuation and improving of call wire electricity transmission capacity.

Description

technical field [0001] The invention relates to a measuring and calculating method, in particular to a measuring and calculating method for random power fluctuation of tie lines based on load fluctuation characteristics. Background technique [0002] In the early stage of UHV power grid construction, the two major regional power grids in Central China and North China were interconnected through UHV lines to form a typical long-chain weak connection system. The operation state recordings of the two major regional interconnection systems show that not only random irregular power fluctuations superimposed on the steady-state transmission power appear on the UHV transmission line, but also the irregular power fluctuations last for as long as 200 seconds about. Although the periods of fluctuations are long or short, they are all at the minute level, and the frequency is far lower than that of low-frequency oscillations. The fluctuation amplitude also reaches ±280MW, accounting f...

Claims

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Application Information

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IPC IPC(8): G06Q50/06
Inventor 孙元章彭晓涛代仕勇朱利鹏孙华东何剑
Owner WUHAN UNIV
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