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Method for monitoring and managing electrical energy quality of electric distribution network

A power quality, supervision and management technology, applied in the field of supervision and management, can solve the problems of unfavorable supervision and management, irregular procedures and low efficiency, and achieve the effect of strengthening supervision and management and improving the level of safe and economic operation.

Inactive Publication Date: 2010-03-10
EAST CHINA ELECTRIC POWER TEST & RES INST +1
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  • Abstract
  • Description
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Problems solved by technology

[0004] At present, there are still standardized procedures and methods for evaluating the power quality of electricity customers' loads connected to the power supply system, which are often handled individually by individual customers. The efficiency is not high, and the procedures are not standardized, which is not conducive to supervision and management.

Method used

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  • Method for monitoring and managing electrical energy quality of electric distribution network
  • Method for monitoring and managing electrical energy quality of electric distribution network
  • Method for monitoring and managing electrical energy quality of electric distribution network

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Embodiment Construction

[0015] According to the provisions of national standards and power quality supervision regulations on power quality indicators, power quality indicators include five indicators: frequency, voltage deviation, voltage fluctuation and flicker, three-phase unbalance, and harmonics. Harmonics, voltage fluctuations and flicker, and three-phase unbalance are often caused by the influence of load on the power grid, while the control of voltage deviation and frequency is mainly realized by dispatching based on power flow control, which is less affected by users. No research analysis was performed in the invention.

[0016] 1. Calculation of harmonics

[0017] According to the provisions of the GB / T14549-1993 standard, the limit value of the bus harmonic voltage (phase voltage) at the common connection point is shown in Table 1.

[0018] Table 1 Bus Harmonic Voltage (Phase Voltage) Limits at Common Connection Points

[0019]

[0020] According to the provisions of the GB / T14549-199...

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Abstract

The invention provides a method for monitoring and managing the electrical energy quality of an electric distribution network, which comprises the following steps of: inputting an electric load characteristic parameter and a system parameter; carrying out simulation calculation of the electrical energy quality; comparing a calculation result with an index limit of the electrical energy quality, and judging whether the calculation result accords with the index limit; and taking an electrical energy quality improving measure if the calculation result does not accords with the index limit.

Description

technical field [0001] The invention relates to a supervision and management method, and in particular to a distribution network power quality supervision and management method. Background technique [0002] With the rapid development of industry, more and more power loads have applied for access to the power supply system in recent years. Due to the variety of loads applying for access, in order to ensure the power quality of the public power supply system and safeguard the legitimate rights and interests of all electricity customers, the power supply company needs to undertake the responsibility of evaluating and supervising the nature of the user's load. [0003] As there are more and more non-linear loads among electricity customers, the harmonic level of the power supply system is relatively prominent. According to the National Electricity Law and the "Power Supply Business Rules" Article 55: the voltage sine wave distortion rate of the public connection point of the po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00G06F17/00G06F17/50G06Q50/00
CPCY02E60/76Y04S40/22
Inventor 蔡霖杨心刚潘国美潘永刚任谦
Owner EAST CHINA ELECTRIC POWER TEST & RES INST
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