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Three-phase load imbalance monitoring system

A technology of load imbalance and monitoring system, applied in the direction of information technology support system, multi-phase network asymmetry reduction, multi-phase network elimination/reduction of asymmetry, etc., can solve problems such as three-phase load imbalance, equipment failure, etc. Achieve the effect of reducing equipment damage, occupying a small area, and ensuring normal operation

Pending Publication Date: 2021-03-23
FUSHUN POWER SUPPLY COMPANY OF STATE GRID LIAONING ELECTRIC POWER SUPPLY +1
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a three-phase load unbalance monitoring system aiming at the problems existing in the prior art, which solves the problem of equipment failure caused by the abnormal operation of the neutral line in the prior art

Method used

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  • Three-phase load imbalance monitoring system
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Embodiment

[0023] A three-phase load unbalance monitoring system, including a current acquisition and transmission module in a distribution station area, an Internet of Things data recording unit in a management station area, and a PC terminal server. The current acquisition and transmission module in a distribution station area samples a neutral line current signal, and then The collected signal is amplified, filtered, analog-to-digital converted, and discrete sampling points are calculated. After calculating the proportion, the test data is transmitted to the Internet of Things data recording unit in the management station area; the Internet of Things data recording unit in the management station area receives the management station The current information of the transformer corresponding to the district, and record the current information, generate a trend graph, according to the set alarm value, when the alarm value is exceeded, send a text message or WeChat to the mobile terminal of t...

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Abstract

The invention relates to a three-phase load imbalance monitoring system, which is structurally characterized in that a power distribution area current acquisition and transmission module samples a neutral line current signal, and then performs amplification, filtering processing, analog-to-digital conversion and discrete sampling point calculation on the acquired signal; after the proportion is calculated, test data is transmitted to the management area Internet of Things data recording unit; the management area Internet of Things data recording unit receives the transformer current information corresponding to the management area, records the current information, generates a trend chart, and sends a short message or a WeChat to a mobile phone terminal of an area manager according to a setalarm value when the alarm value is exceeded; the PC end server takes the management area as a unit, all test points of the transformer in the area form a network through the cloud server, and a neutral line current change database of all transformers in the area is established; and the PC end servers of the transformer areas are connected in a networking manner, and are used for summarizing allmonitoring data to generate a report. The system is simple, efficient and safe to operate.

Description

technical field [0001] The invention relates to a three-phase load unbalance monitoring system, which belongs to the field of electric power application. Background technique [0002] The low-voltage distribution network (380 volts) mostly adopts the TN system to operate. Due to unbalanced three-phase loads or single-phase ground faults, etc., the neutral point will drift. At this time, a large current will flow through the neutral line, and sometimes it may up to hundreds of amps. When the neutral line has a displacement voltage, the three-phase voltage is unbalanced, which will cause a certain phase voltage to be higher than the maximum allowable voltage of the equipment and a certain phase voltage to be lower than the minimum allowable voltage of the equipment, so that the equipment cannot operate normally. In addition, when the central line is disconnected, the user's electrical equipment will be damaged, which will easily lead to claim disputes between the user and the...

Claims

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Application Information

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IPC IPC(8): H02J13/00H02J3/26
CPCH02J13/00002H02J13/00001H02J13/00036H02J3/26Y04S40/128Y02E40/50Y02E60/00
Inventor 吴彤杨孝磊兰程皓张福良王帅王嘉莹金黛王闯曹慧姸史博宇李博王淼王振宇赵严张磊佟锐朱波李佳琳于迪刘天鹤
Owner FUSHUN POWER SUPPLY COMPANY OF STATE GRID LIAONING ELECTRIC POWER SUPPLY
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