Intelligent power distribution network outdoor broken circuit monitoring device

Abstract

The invention discloses an intelligent power distribution network outdoor broken circuit monitoring device. The intelligent power distribution network outdoor broken circuit monitoring device comprises a breaker main body; the breaker main body is provided with a power supply module, a control module and a sampling module; the control module and the sampling module are respectively connected to the power supply module; the control module comprises a single-chip microcomputer controller, a signal processing module and an intelligent driving controller; and the control module and the sampling module are connected through a transmission module. The intelligent power distribution network outdoor broken circuit monitoring device can realize a function of switching on and off a circuit load and isolating a fault, realizes an on-site control operation and realizes a remote control operation through a front end collection device receiving a system order. The intelligent power distribution network outdoor broken circuit monitoring device not only finishes data collection, wherein the data includes data of three-phase current, voltage, a breaker state, etc, but also realizes remote fault alarm, and can detect an interphase short circuit fault of the circuit, a single-phase grounding fault and transmits fault information to an automation main station.

Description

technical field [0001] The invention relates to the technical field of outdoor power distribution equipment, in particular to an outdoor circuit breaker monitoring device for an intelligent distribution network. Background technique [0002] With the development of the economy, the progress of the society, and the improvement of the level of science and technology and informationization, the development and utilization of energy and the coordinated development of the power grid are facing new issues and challenges. Relying on modern information, communication and control technologies, it is the future development trend to improve the intelligent level of power grid. For this reason, all power supply enterprises have accelerated the pace of power grid informatization, automation, and interactive construction. Longqi is very urgent to upgrade and transform in terms of distribution network automation. [0003] In the construction of distribution network automation system, the ...

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Problems solved by technology

[0003] In the construction of distribution network automation system, the problem of low-voltage power supply of automation devices has always been a major bottleneck in line upgrading and transformation; conventional solutions use electromagnetic voltage transformers to obtain power, which need to be hoisted and wired separately during engineering construction, which increases Due to the large amount of engineering construction, it is easy to cause wiring errors; there are also plans to use high-voltage current transformers or solar panels to obtain power, but this kind of plan may be affected by weather and load changes in actual use, and the power supply is unstable, which limits Development of Distribution Automation

[0004] At present, ordinary outdoor high-voltage circuit breakers are composed of ordinary circuit breakers, controllers, and power transformers. The switches of this mode, the primary and secondary junction boxes of power transformers, and the control wiring of the controller are all exposed to severe cold, heat, wind, and thunderstorms outdoors. High failure rate and poor reliability

During line maintenance, manual opening and closing is required, the degree of automation is low, and it is difficult to meet the basic requirements of the smart grid

When the 10KV line loses power, including some instantaneous faults caused by weather and channel reasons, it is necessary to conduct manual inspections to determine the fault point and fault type for troubleshooting, and then manually reclose the switch to restore power supply. The disadvantage of the mode is that it takes a long time to deal with faults, and the economic and social benefits do not match, which limits the development of distribution network automation

[0005] Therefore, as one of the most important control and protection equipment in the power system, the outdoor high-voltage circuit breaker faces shortcomings such as inconvenient source, easy open circuit of high-voltage current transformer, and weak impact resistance of the driving mechanism of opening and closing operation; Retrofitting on the basis of ordinary outdoor vacuum circuit breakers requires additional equipment such as power supply units, current transformers, automatic data interfaces, and front-end acquisition devices. The number of equipment involved is large, the organization and coordination are complicated, and the amount of on-site installation work is large.

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