A comprehensive reactive power voltage regulation and compensation device for distribution network for terminal concentrated load

A voltage regulation and compensation device, a technology of concentrated load, applied in the direction of reactive power compensation, AC network voltage adjustment, etc., can solve problems such as inability to adapt to load capacity or power factor changes, and achieve improved power supply voltage quality, stable performance, and reduced voltage. drop effect

Active Publication Date: 2021-01-05
STATE GRID SHAANXI ELECTRIC POWER RES INST +4
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When there is a concentrated large load at the end of the distribution network, the traditional single capacitor compensation device or parallel capacitor compensation device cannot adapt to the load capacity or power factor change

Method used

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  • A comprehensive reactive power voltage regulation and compensation device for distribution network for terminal concentrated load
  • A comprehensive reactive power voltage regulation and compensation device for distribution network for terminal concentrated load
  • A comprehensive reactive power voltage regulation and compensation device for distribution network for terminal concentrated load

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Embodiment Construction

[0022] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0023] With the continuous development of power supply capacity and power transmission radius of distribution network, the problems of distribution network caused by load are becoming more and more prominent. When the distribution network line is long and the inductive load at the end is heavy, the voltage drop of the line is serious. To solve the problem of single voltage drop, the series capacitor compensation device in the overcompensation state should be used. However, for the distribution network system with large power supply radius, low power factor, heavy load and serious voltage drop, it is difficult to compensate the voltage along the line with series capacitor compensation. At this time, it is more appropriate to use parallel capacitor compensation to improve power factor and reduce line drop. The invention realizes the integratio...

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Abstract

The invention discloses a comprehensive reactive power voltage-regulation compensation device of a power distribution network for a tail-end concentrated load. The comprehensive reactive power voltage-regulation compensation device comprises a compensation system and a control system, wherein the compensation system comprises a capacitor, a damping loop, a voltage limiter, a bypass circuit breaker, a controllable circuit breaker and a rapid switch and is used for improving voltage quality under continuous running voltage, and the control system comprises a current transformer, a voltage transformer, a voltage comparator, power factor monitoring equipment, a power factor comparator, a logic operation circuit and a trigger circuit. In the device, series capacitance compensation or parallel capacitance compensation working state is adjusted by the controllable circuit breaker and by identifying a voltage and power factor of a load, so that the adaptability and the reliability of reactivepower compensation are ensured. The comprehensive reactive power voltage-regulation compensation device is mainly used for improving the electric energy quality of the power distribution network and is particularly suitable for voltage compensation of a concentrated large load of which the load is concentrated at a tail end of a power distribution network line and which is low in power factor.

Description

technical field [0001] The invention belongs to the technical field of reactive power compensation and voltage adjustment in electric power systems, and in particular relates to a comprehensive reactive power voltage regulation and compensation device for a distribution network used for terminal concentrated loads. Background technique [0002] Voltage quality usually includes voltage deviation, voltage frequency deviation, voltage unbalance, voltage fluctuation and flicker, voltage harmonics, etc. Voltage deviation refers to the percentage of the ratio of the difference between the actual voltage of a node and the system nominal voltage (namely the rated voltage) to the system nominal voltage in the normal operation mode of the power supply system. Voltage deviation is one of the important indicators of voltage quality. [0003] Reasonable adjustment of the voltage along the distribution network is fundamental to ensure the quality of electricity for users. The parallel c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/16
CPCY02E40/30
Inventor 琚泽立蒲路吴彪侯喆吕新良高子豪郭洁李梦真张伟牛全保赵学风高峰段玮杨传凯孙浩飞
Owner STATE GRID SHAANXI ELECTRIC POWER RES INST
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