A system for intelligent and accurate measurement of in-situ cut-off protection for ring network cabinets and its implementation method

Abstract

The invention discloses a system for intelligently and accurately measuring on-site cutting protection of a ring network cabinet. The ring network cabinet includes a primary room and a secondary room; Transformer; the current transformer and voltage transformer send the collected monitoring data to the controller in the secondary room, the primary room monitoring sensor of the ring network cabinet is connected to the secondary room through a data line, and the primary room is equipped with a circuit breaker . The advantages of the present invention are: the current transformer and the voltage transformer send the collected monitoring data to the controller in the secondary room, and the data processing module of the controller performs calculation and analysis on the collected data, realizing faults of different natures, targeted treatment.

Description

technical field [0001] The invention relates to the technical field of electrical equipment, and more specifically, relates to a system for intelligently and accurately measuring in-situ cutting protection of a ring network cabinet and an implementation method thereof. Background technique [0002] Ring Main Unit (Ring Main Unit) is a group of transmission and distribution electrical equipment (high-voltage switchgear) installed in a metal or non-metallic insulated cabinet or made into an assembled interval ring network power supply unit. Its core part adopts load switches and The fuse has the advantages of simple structure, small size, low price, improved power supply parameters and performance, and power supply safety. It is widely used in distribution stations and box-type substations of load centers such as urban residential quarters, high-rise buildings, large public buildings, factories and enterprises. [0003] At present, the feeder automation system scheme for the ...

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Problems solved by technology

[0005] This traditional feeder automation mode has the characteristics of simple equipment configuration, no need for communication, and high success rate of fault isolation, but it also has the following disadvantages: every fault will cause the trip of the feeder outlet switch; Multiple openings and closings of feeder outgoing switches are required, resulting in multiple repeated power outages in non-faulty areas and multiple impacts on the system; it takes a long time to isolate faults, and segmental load switches are required to delay closing segment by segment; the feeder cannot be realized Remote monitoring and control of power flow and switching conditions

However, this system can only achieve simple fault isolation, and cannot perform targeted processing for faults of different natures; the existing technology cannot monitor the execution components in the ring main unit, and the execution components often appear "rejection", " In the case of "misoperation", the execution command cannot be effectively executed, resulting in the expansion of the fault

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