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Transformer area reactive power compensation system and method

A compensation system, a technology in the station area, applied in reactive power compensation, reactive power adjustment/elimination/compensation, information technology support systems, etc., can solve the problems of insufficient compensation capacity, insufficient precision, overcompensation, etc., to achieve the maximum power factor , achieve precise control, and achieve the effect of regional voltage

Pending Publication Date: 2021-06-22
国网山东省电力公司安丘市供电公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the defects of undercompensation and overcompensation caused by insufficient compensation capacity or insufficient precision of the reactive power compensation device in the low-voltage distribution station area of ​​the rural distribution network mentioned above in the prior art, the present invention provides a reactive power compensation system and method for the station area , to solve the above technical problems

Method used

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  • Transformer area reactive power compensation system and method
  • Transformer area reactive power compensation system and method
  • Transformer area reactive power compensation system and method

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Effect test

Embodiment 1

[0054] Such as figure 1 As shown, the present invention provides a reactive power compensation system in a station area, including a reactive power compensation device 2, a voltage acquisition module 3, a compensation control module 1, a communication module 4, and a local storage module 5; the compensation control module 1 and the reactive power compensation device 2. The voltage acquisition module 3, the communication module 4 and the local storage module 5 are connected, and the communication module 4 is connected with the display device 6 of the cloud main station;

[0055] The reactive power compensation device 2 is set in the low-voltage line of the distribution transformer in the station area, and connected in parallel with the nonlinear load;

[0056] The voltage acquisition module 3 is set at the power supply position at the end of the low-voltage line of the distribution transformer in the station area, and collects the voltage value at the end of the low-voltage lin...

Embodiment 2

[0060] Such as figure 1 As shown, the present invention provides a reactive power compensation system in a station area, including a reactive power compensation device 2, a voltage acquisition module 3, a compensation control module 1, a communication module 4, and a local storage module 5; the compensation control module 1 and the reactive power compensation device 2. The voltage acquisition module 3, the communication module 4 and the local storage module 5 are connected, and the communication module 4 is connected with the display device 6 of the cloud main station;

[0061] The reactive power compensation device 2 is set in the low-voltage line of the distribution transformer in the station area, and is connected in parallel with the nonlinear load; the nonlinear load refers to the load containing the rectification equipment; in the electronic circuit, the voltage and the current are not in a linear relationship. During the input and operation process, the relationship bet...

Embodiment 3

[0074] Such as figure 2 As shown, the present invention provides a compensation method based on the reactive power compensation system in the above-mentioned embodiment 1 or 2, including the following steps:

[0075] S1. Each voltage acquisition module collects the terminal voltage value of the distribution transformer low-voltage line in each station area, sets it as the first voltage value, and provides it to the compensation control module;

[0076] S2. The compensation control module judges whether the first voltage value exceeds the set voltage threshold range according to the collected first voltage value of the distribution transformer in the station area, and when the first voltage value exceeds the set voltage threshold range, the distribution transformer is checked. controlling and adjusting until the first voltage value meets the set voltage threshold range;

[0077] S3. The compensation control module judges whether the first voltage fluctuation range exceeds the...

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Abstract

The invention provides a transformer area reactive power compensation system and method. The system comprises a reactive power compensation device, a voltage acquisition module, a compensation control module, a communication module and a local storage module. The reactive power compensation device is arranged in a low-voltage line of a transformer area distribution transformer and is connected in parallel with a nonlinear load; the voltage acquisition module is arranged at a power supply position at the tail end of the distribution transformer low-voltage line in a transformer area and acquires a voltage value at the tail end of the distribution transformer low-voltage line; the compensation control module obtains a voltage value, collected by the voltage acquisition module, of the tail end of the low-voltage line of the corresponding distribution transformer in the transformer area, sets the voltage value as a first voltage value, adjusts the distribution transformer, and controls and adjusts capacitor switching of the reactive power compensation device until the first voltage value conforms to a preset voltage threshold range; the fluctuation amplitude of the first voltage value accords with the voltage fluctuation amplitude range; and the compensation control module also uploads the switching information and the first voltage value to a cloud master station display device through the communication module for real-time dynamic display.

Description

technical field [0001] The invention belongs to the technical field of electric power reactive power compensation, and in particular relates to a reactive power compensation system and method in a station area. Background technique [0002] The station area, in the power system, refers to the power supply range or area of ​​a transformer. [0003] Distribution transformer, the abbreviation of distribution transformer, refers to a static electrical device that transforms AC voltage and current according to the law of electromagnetic induction and transmits AC power in the power distribution system. [0004] As a large number of power electronic devices as nonlinear loads are connected to the grid, harmonic pollution will inevitably occur in the grid. Harmonic pollution will affect the power quality of the grid side, and harmonics need to be suppressed. Harmonic suppression is to compensate the harmonic current brought by nonlinear load by performing reactive power compensati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/18H02J13/00
CPCH02J3/18H02J13/00001H02J13/00002H02J13/00006Y04S40/12Y02E40/30Y02E60/00Y02B90/20
Inventor 刘江坤王志文韩晓明柳永清王楠孙亮孟庆俊孙希顺
Owner 国网山东省电力公司安丘市供电公司
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