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Power distribution network power quality monitoring and comprehensive evaluation system and method

A power quality monitoring and power quality technology, applied in the field of electric power engineering, to achieve the effect of solving the data is too sensitive, the evaluation results are clear, and the limitations are avoided

Pending Publication Date: 2020-05-19
STATE GRID ZHEJIANG ELECTRIC POWER CO LTD SHAOXING POWER SUPPLY CO +2
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  • Description
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  • Application Information

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Problems solved by technology

Existing Empowerment Assessment Methods Are Still Inadequate

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  • Power distribution network power quality monitoring and comprehensive evaluation system and method
  • Power distribution network power quality monitoring and comprehensive evaluation system and method
  • Power distribution network power quality monitoring and comprehensive evaluation system and method

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Effect test

Embodiment 1

[0053] A distribution network power quality monitoring and comprehensive evaluation system, including a distribution network power quality monitoring system and a distribution network power quality comprehensive evaluation system, wherein the distribution network power quality monitoring system includes a power quality monitoring terminal, a workstation, and a monitoring center The master station, the power quality monitoring terminal is used to monitor power quality indicators, the power quality indicators include bus frequency deviation, voltage deviation, voltage fluctuation, voltage flicker, harmonic voltage, three-phase unbalance, the workstation and The power quality monitoring terminal communicates with the main station of the monitoring center, and sends the data collected by the power quality monitoring terminal to the main station of the monitoring center; the distribution network power quality comprehensive evaluation system includes a power quality combination weight...

Embodiment 2

[0055] A power quality monitoring and comprehensive evaluation method for a distribution network. Firstly, the power quality indicators are monitored through a power quality monitoring terminal and summarized by a monitoring center master station; secondly, a comprehensive evaluation is performed.

[0056] Such as figure 1 As shown, the specific process of comprehensive assessment includes the following steps:

[0057] Step 1: Establish a comprehensive evaluation system for power quality and classify power quality;

[0058] Step 2: Using the CRITIC method to obtain the objective weight vector of power quality;

[0059] Step 2.1. Construct the matrix X to be evaluated m×n , where m is the number of nodes with assessment, and n is the number of indicators in the power quality assessment system in step 1;

[0060] Step 2.2, performing data standardization processing on the evaluation matrix to obtain a standardized evaluation matrix;

[0061]

[0062] in, It is the maxim...

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Abstract

The invention discloses a power distribution network power quality monitoring and comprehensive evaluation system and method. The method comprises the following steps: S1, monitoring power quality indexes through a power quality monitoring terminal, and summarizing the power quality indexes by a monitoring center master station; s2, performing dimensionless processing on the power quality indexesthrough range change, and obtaining objective weights of the power quality by applying a CRITIC method; s3, obtaining a subjective weight by applying an improved expert scoring method; s4, performingsubjective and objective combination to obtain a combined weight; and S5, grading the electric energy quality standard data, and obtaining an evaluation result and a corresponding electric energy quality grade through a weighted TOPSIS method. The electric energy quality indexes are monitored based on the electric energy quality monitoring terminal, and combined evaluation analysis is carried out,so the limitation of a single weighting method on electric energy quality evaluation is avoided.

Description

technical field [0001] The invention belongs to the technical field of electric power engineering, and in particular relates to a power quality monitoring and comprehensive evaluation system and method of a distribution network. Background technique [0002] The rapid increase of electricity load, the popularization and use of computers and power electronic sensitive loads, and the quality of power directly affect people's quality of life and the overall benefits of the national economy. Scientific and reasonable detection and evaluation of power quality, and objective and accurate measurement of power quality are conducive to promoting the comprehensive management of power quality and establishing a fair power market. Power quality assessment is one of the hot topics in current power quality research. Power quality is usually described by multiple indicators comprehensively. Therefore, the core content of power quality assessment research is to weight and normalize a multi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/16G06F17/18G06Q10/06G06Q50/06
CPCG06F17/16G06F17/18G06Q10/06393G06Q10/06395G06Q50/06Y02P90/82
Inventor 俞永军蔡重凯周关连王辉陈晓宇张旭阳王滔葛昆明马超裘晓广
Owner STATE GRID ZHEJIANG ELECTRIC POWER CO LTD SHAOXING POWER SUPPLY CO
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