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Voltage sag electric quantity loss assessment method and system

A voltage sag and evaluation system technology, applied in the electric power field, can solve the problems of low accuracy and engineering operability, affecting the power quality of electrical equipment, etc., and achieve the effect of high engineering operability

Active Publication Date: 2019-07-12
SHENZHEN POWER SUPPLY BUREAU
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AI Technical Summary

Problems solved by technology

Among them, voltage sag is the main power quality problem that affects the normal operation of electrical equipment.
Traditional methods mainly rely on economic loss research, mathematical evaluation and other means, which have low accuracy and engineering operability

Method used

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  • Voltage sag electric quantity loss assessment method and system
  • Voltage sag electric quantity loss assessment method and system

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Embodiment Construction

[0030] The present invention provides a method for evaluating power loss due to voltage sag, such as figure 1 As shown, it includes the following steps:

[0031] Count the number of voltage sags and blackouts of different types of distribution networks in the study area within a set time;

[0032] Calculate the number of power supply users and the number of power supply users with voltage sags in the research area within a set time, and calculate the power outage levels of different types of voltage sag users based on the number of power supply users and the number of power supply users with voltage sags in the distribution network;

[0033] Calculate the weighting factors of different types of voltage sags according to the number of power outages of different types of voltage sags and users of different types of voltage sags;

[0034] According to the power before the power outage of the voltage sag of the distribution network, the power after the power outage of the voltage sag of t...

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Abstract

The invention provides a voltage sag electric quantity loss assessment method and system. The method comprises the following steps: counting voltage sag power failure times of different types of powerdistribution networks in a research area within set time; counting the number of power supply users and the number of power distribution network voltage sag power failure users in the research area within set time, and calculating the power failure degree of different types of voltage sag users; calculating different types of voltage sag weight factors according to different types of power distribution network voltage sag power outage times and different types of voltage sag user power outage degrees; according to the power before the power distribution network voltage sag power failure, thepower after the power distribution network voltage sag power failure and the user voltage sag power failure duration, calculating the power loss of the single user single voltage sag power failure; calculating electric quantity loss expectation values of different types of voltage sags; and calculating power supply system voltage sag power loss. The power loss of the power supply system caused bythe voltage sag can be accurately evaluated, and the engineering operability is high.

Description

Technical field [0001] The invention relates to the field of electric power technology, and in particular to a method and system for evaluating power loss due to voltage sags. Background technique [0002] With the development of technology and economy, more and more users use sensitive loads in the power grid, which puts forward higher and higher requirements on power quality, which has attracted people's attention. Among them, voltage sag is the main power quality problem that affects the normal operation of electrical equipment. Traditional methods mainly rely on economic loss investigations, mathematical evaluations and other methods that have low accuracy and low engineering operability. Summary of the invention [0003] In order to solve the above technical problems, the present invention provides a method and system for evaluating power loss due to voltage sags, which can accurately evaluate the power loss of a power supply system caused by voltage sags, and has high engin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/0639G06Q50/06
Inventor 史帅彬
Owner SHENZHEN POWER SUPPLY BUREAU
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