Intelligentized switch cabinet integrative monitoring system

Abstract

The invention discloses an intelligentized switch cabinet integrative monitoring system, which relates to the automatic monitoring field of a switch cabinet for a converting station and a power distribution station, adopts a distributed control manner, and comprises a network master control device, a distributed switch cabinet monitoring terminal and a boosted capacitor protecting and monitoring device, wherein the network master control device is used for receiving characteristic quantity information and a local discrimination conclusion sent by a front-end device, and integrally discriminating and generating a small current ground connection wire-selected result; the distributed switch cabinet monitoring terminal is used for monitoring the electric energy quality of each circuit, and discriminating whether the circuit is grounded or not according to fault characteristic quantity of the circuit; the boosted capacitor protecting and monitoring device is used for automatically controlling the input and the removal of a boosted capacity bank; and the distributed switch cabinet monitoring terminal and the boosted capacitor protecting and monitoring device are connected with the network master control device through a communication network structure. The intelligentized switch cabinet integrative monitoring system disclosed by the invention integrates the functions of small current ground connection wire selecting, electric energy quality on-line monitoring, temperature and humidity on-line monitoring in the cabinet, and the like into a whole, is easy and convenient to install, has low cost and highly promotion value, and can realize great economic and social benefits.

Description

technical field [0001] The invention relates to the automatic monitoring field of switch cabinets used in substations and distribution stations, in particular to an intelligent switch cabinet comprehensive monitoring system. Background technique [0002] With the rapid development of distribution network automation and the increasing reliability of power supply, the requirements for switchgear are getting higher and higher. Especially when substations and power distribution stations gradually realize comprehensive automation and become unattended, more requirements are put forward for the monitoring equipment of the operating status of switches and switch cabinets. At present, the monitoring equipment for switchgear mainly includes: microcomputer protection measurement and control device, small current grounding line selection device, power quality monitoring device, temperature and humidity monitoring device in the cabinet, etc. [0003] Microcomputer protection measuremen...

AI Technical Summary

Problems solved by technology

However, due to the changeable operation mode of the small current grounding system and the complex types of ground faults, when the system has a small capacitance to ground or a large resistance ground fault occurs, the ground fault current is very small at this time, and the measurement of the zero-sequence current transformer is not accurate. , so the existing grounding line selection device often misselects, and it is difficult to ensure the accuracy of line selection;

[0009] 2. The installation and wiring are complex and costly

Since there is no comprehensive monitoring device at present, if comprehensive monitoring of the switchgear is required, devices such as grounding line selection, power quality monitoring, and temperature and humidity monitoring need to be installed separately. Increased workload of operation and maintenance personnel

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