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Voltage sag source positioning method considering responsibility division

A voltage sag source, voltage sag technology, applied in the direction of measuring electricity, fault location, measuring electrical variables, etc., can solve the problem of not giving quantitative results, not taking load characteristics well, etc.

Inactive Publication Date: 2016-11-23
国网电力科学研究院武汉能效测评有限公司 +2
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: most of the existing sag source location methods do not consider the load characteristics well, or simply default to simple load models such as constant impedance, and most of them do not give quantitative The problem with the result

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  • Voltage sag source positioning method considering responsibility division
  • Voltage sag source positioning method considering responsibility division
  • Voltage sag source positioning method considering responsibility division

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Embodiment Construction

[0059]The present invention provides a voltage sag source location method considering the division of responsibilities, including S1) collecting data on public connection points that need to monitor voltage sag, including fundamental positive sequence voltage, current effective value, and power factor; S2) According to the measured electrical data, calculate the system impedance parameters; S3) calculate the upstream and downstream weight coefficients causing the voltage sag; S4) judge the location of the voltage sag source according to the upstream and downstream weight coefficients of the voltage sag, and calculate the weight coefficient proportion, to determine upstream and downstream responsibilities. Most of the existing sag source location methods do not consider the load characteristics well, or simply default to simple load models such as constant impedance, and most of them do not give quantitative results. This method analyzes the relationship between upstream system...

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Abstract

The present invention provides a voltage sag source location method considering the division of responsibilities, including: S1) collecting data on public connection points that need to monitor voltage sag, including fundamental positive sequence voltage, current effective value, and power factor; S2 ) Calculate the system impedance parameters according to the measured electrical data; S3) Calculate the upstream and downstream weight coefficients causing the voltage sag; S4) Determine the location of the voltage sag source and calculate the weight according to the upstream and downstream weight coefficients of the voltage sag The proportion of the coefficient determines the upstream and downstream responsibilities. This method can quantitatively give the location results of the voltage sag source, and calculate the upstream and downstream responsibility coefficients based on this, which can provide good data support for resolving disputes between power suppliers and consumers.

Description

technical field [0001] The invention belongs to the technical field of power quality detection and monitoring, and in particular relates to a method for locating a voltage sag source. Background technique [0002] In recent years, among various disturbances that may cause power quality degradation, short-term disturbances such as voltage sags, swells, and voltage interruptions have attracted the attention of power supply departments, industrial and commercial users, and researchers. Among them, voltage sag has the characteristics of short duration, certain randomness, frequent occurrence, and often brings large economic losses, and is considered to be one of the most serious power quality problems. Taking the industrial production process as an example, although the voltage sag lasts for a short time, it usually takes several hours for the production equipment to return to normal use. The production delay, production interruption and product quality degradation caused by the...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08
CPCG01R31/088
Inventor 肖楚鹏邱泽晶丁胜许朝阳陈小飞冯伦饶尧
Owner 国网电力科学研究院武汉能效测评有限公司
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