Control method for adjusting reactive voltage of power distribution network to ensure electric energy quality of low-voltage region

A control method and technology of power distribution network, applied in the direction of reactive power compensation, AC network voltage adjustment, etc., can solve problems such as no-voltage reactive power control algorithm

Inactive Publication Date: 2018-01-09
STATE GRID TIANJIN ELECTRIC POWER +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no mature voltage and reactive power control algorithm for distribution network

Method used

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  • Control method for adjusting reactive voltage of power distribution network to ensure electric energy quality of low-voltage region
  • Control method for adjusting reactive voltage of power distribution network to ensure electric energy quality of low-voltage region
  • Control method for adjusting reactive voltage of power distribution network to ensure electric energy quality of low-voltage region

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Embodiment Construction

[0013] The present invention will be further described in detail below through the specific examples, the following examples are only descriptive, not restrictive, and cannot limit the protection scope of the present invention with this.

[0014] A control method for adjusting the reactive voltage of a distribution network to ensure power quality in a low-voltage area, the steps are as follows:

[0015] Step 1) apply load forecasting, analyze the load demand parameters of the next day, and analyze and determine the load type to which each load belongs, and establish a load model;

[0016] Step 1.1) Apply load forecasting, analyze the load demand parameters of the next day, obtain the load parameters of the distribution network, and determine the load type of each load as one of the four types of loads: constant impedance load, constant current load, constant energy load, and constant power load .

[0017] According to the load distribution issued by my country, the load types...

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Abstract

The invention relates to a control method for adjusting the reactive voltage of a power distribution network to ensure the electric energy quality of a low-voltage region. The method comprises the steps of 1) applying the load prediction, analyzing a next-day load demand parameter, analyzing and determining the type of each load, and establishing a load model; 2) applying the load prediction, analyzing the next-day terminal voltage information of a feeder line of a power distribution network, determining a voltage drop limit value and a voltage expected value, and determining the tapping pointof a grading voltage regulator and a to-be-switched capacitance value; 3) based on the capacitance value obtained through prediction, preparing a capacitor in advance; 4) when an intraday load is increased, adjusting the tapping point of the voltage regulator is real time or a switched capacitor to compensate the reactive power shortage. According to the invention, the next-day load prediction data is adopted as a basis, and the required value of the capacitor is prepared in advance. When the intraday load is increased, the well prepared capacitor is put into use. Therefore, on the premise that the voltage drop is ensured to be within an expected range, the power supply quality is guaranteed.

Description

technical field [0001] The invention belongs to the field of voltage and reactive power control of a distribution network, and relates to a control method for adjusting the reactive voltage of a distribution network and ensuring the quality of electric energy in a low-voltage area. Background technique [0002] In recent years, with the rapid growth of seasonal tourism in rural areas, the capacity of distribution transformers planned and constructed according to the traditional conventional load forecasting method can guarantee the load demand of the power supply area in winter, but in the tourist season between May and October , it is difficult to guarantee the power load demand. Especially on weekends, with the sudden increase in the number of people in tourist areas such as farmhouses, some users even need to equip their own fuel generators to meet the load demand. This method not only limits the economic improvement and development capabilities of rural areas, but also c...

Claims

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Application Information

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IPC IPC(8): H02J3/16
CPCY02E40/30
Inventor 姜帆魏国忠阮琛奂王大成王海超崔灿刘通欧干新崔玉顺顿朝晖
Owner STATE GRID TIANJIN ELECTRIC POWER
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