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Low-voltage transformer area working condition monitoring and three-phase load balancing automatic adjusting system

A load balancing, low-voltage platform technology, applied in the direction of reducing the asymmetry of the multi-phase network, eliminating/reducing the asymmetry of the multi-phase network, etc., can solve the problem of the unfavorable stable operation of the equipment, the frequent operation of the three-phase adjustment frequency, and the inability of reactive power. Real-time monitoring of load monitoring devices, etc., to achieve the effect of popularizing and applying value, reducing quantity and related costs, and improving power supply efficiency

Active Publication Date: 2014-03-19
STATE GRID HENAN ELECTRIC ZHOUKOU POWER SUPPLY +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned low-voltage three-phase load unbalance automatic adjustment system cannot perform real-time monitoring according to the reactive power load monitoring device connected to the main controller. When the capacity level of reactive power compensation is low, each branch runs under heavy load during the peak period of power consumption. At this time, the three-phase adjustment frequency will be operated very frequently, which is not good for the stable operation of the equipment.

Method used

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  • Low-voltage transformer area working condition monitoring and three-phase load balancing automatic adjusting system
  • Low-voltage transformer area working condition monitoring and three-phase load balancing automatic adjusting system
  • Low-voltage transformer area working condition monitoring and three-phase load balancing automatic adjusting system

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Embodiment 1

[0017] Such as figure 1 with figure 2 As shown, a low-voltage station area working condition monitoring and three-phase load balance automatic adjustment system includes a low-voltage multi-capacitor capacitor, an automatic phase change switch, a residual current circuit breaker, a distribution network monitoring terminal, a system platform, and the distribution network The monitoring terminal is connected to the system platform through a GPRS network. The residual current circuit breaker is installed on each power supply branch on the low voltage side of the distribution network with the low voltage multi-capacitor capacitor connected in series. The residual current circuit breaker communicates with the system through 485 communication. The monitoring terminal is connected, the automatic reversing switch is connected to the monitoring terminal of the distribution network through a wireless power carrier, wherein the low-voltage multi-capacitance capacitor includes a plurality o...

Embodiment 2

[0019] Such as image 3 As shown, the difference from the first embodiment is that: the distribution network monitoring terminal is connected with a temperature collection device, the temperature collection device includes a transformer oil temperature collection terminal and a terminal temperature collection terminal; the system platform is wirelessly connected with a transformer An overheat protection device, the transformer overheat protection device protects a switch and a protection chip, and the protection chip is connected to a protection switch serially connected to the outlet end of the transformer through an auxiliary switch of a time relay, an electromagnetic relay and an electromagnetic relay.

[0020] The present invention divides each branch meter box of the low-voltage distribution station area into several units to be monitored, and each branch is obtained by an electronic residual current circuit breaker or a three-phase digital watt-hour meter installed on each p...

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Abstract

The invention discloses a low-voltage transformer area working condition monitoring and three-phase load balancing automatic adjusting system comprising a low-voltage multi-capacity capacitor, an automatic phase-change switch, residual current breakers, a power distribution network monitoring terminal and a system platform. The power distribution network monitoring terminal is connected with the system platform via a GPRS network. The residual current breakers are installed on all power supply branches of a power distribution network low-voltage side which is series-connected with the low-voltage multi-capacity capacitor. The residual current breakers are connected with the monitoring terminal via a 485 communication mode. The automatic phase-change switch is connected with the power distribution network monitoring terminal via a wireless electric power carrier. The low-voltage multi-capacity capacitor comprises multiple isometric charging elements which are connected in parallel. Parallel-connection wires of the isometric charging elements are connected in series with electric control switches so that capacitance compensation level matching is realized. Three-phase load balancing automatic adjustment and reactive compensation capacity level matching can be realized so that electric energy loss in a transformer area is reduced and frequency of three-phase automatic adjusting phase change in peak periods is reduced.

Description

Technical field [0001] The invention relates to the technical field of data acquisition and monitoring, in particular to a low-voltage platform working condition monitoring and three-phase load balance automatic adjustment system. Background technique [0002] The three-phase load balance adjustment in the low-voltage station area has always been one of the main problems that plagued power supply companies. Most low-voltage power grids are used to supply power to users in a three-phase four-wire system after a 10 / 0.4KV transformer is stepped down. It is a three-phase production A power supply network in which electricity and single-phase loads are mixed. When installing single-phase users, the power supply department should balance the single-phase load on the three phases A, B, and C. However, in actual work and operation, the line signs, the negligence of the power-connecting personnel, and the uncontrollable increase in capacity due to single-phase users, the access of high-p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/26
CPCY02E40/50
Inventor 张金涌李琳刘守明史宏伟
Owner STATE GRID HENAN ELECTRIC ZHOUKOU POWER SUPPLY
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