Testing device and method for terminal strip of electric isolation knife switch

Abstract

The invention discloses a testing device and method for a terminal strip of an electric isolation knife switch, and relates to the technical field of power system integrated automation equipment inspection. The testing device comprises a host, and a photoelectric isolation signal leading-out terminal strip is embedded in the top of the host. A touch screen is embedded in a front end panel of the host; and a power button, a closing detection button, an opening detection button and a phase sequence detection button are sequentially installed on the front end panel of the host from left to right.A signal acquisition module, a signal output module and a power supply module are sequentially embedded at the rear end of the host. According to the testing device, a secondary circuit of the electric isolation knife switch can be overhauled and maintained under the condition that a main knife is electrified; the key point is that testing is carried out after replacement of auxiliary loops, suchas an electric loop and a motor, of the electric isolation knife switch, the problem that buses and lines are not easy to power off for maintenance in debugging of the secondary loop of the electricisolation knife switch is solved, the power supply reliability is improved, and remarkable economic benefits and social benefits are achieved.

Description

technical field [0001] The invention relates to the technical field of power system comprehensive automation equipment inspection, in particular to a testing device and a testing method for an electric isolation knife switch terminal block. Background technique [0002] The electric isolating switch is a very important primary equipment in power transmission and transformation. In the voltage level of 110kV and above, the ratio of the number of electric isolating switches to circuit breakers is about 3:1. The reliability of the power system has a great influence. According to statistics, among all vicious misoperation accidents, the number of operating accidents of the electric isolation switch is close to 1 / 4 of the total number of accidents, and due to the large number of electric isolation switches, the number of accidents It is also very large, but there are not many test devices for electric isolation switch at present. If it is to be overhauled, it is necessary to cut ...

AI Technical Summary

Problems solved by technology

[0002] The electric isolation switch is a very important primary equipment in power transmission and transformation. In the voltage level of 110kV and above, the ratio of the number of electric isolation switches to circuit breakers is about 3:1. The reliability of the power system has a great influence. According to statistics, among all vicious misoperation accidents, the number of operating accidents of the electric isolation switch is close to 1 / 4 of the total number of accidents, and due to the large number of electric isolation switches, the number of accidents It is also very large, but there are not many test devices for electric isolation switch at present. If it is to be overhauled, it is necessary to cut off the power of the busbar and the switch interval. It is very difficult to realize the test. Therefore, the electric When the operating mechanism fails, it is often impossible to cut off the power for maintenance, which brings great hidden dangers to the operation of the power grid

[0003] The secondary circuit of the electric isolation switch is mainly composed of the main circuit of the motor, the control circuit of the motor and the auxiliary circuit. Carry out the test, the method is to isolate the main knife of the switch to the middle position by hand, and then carry out the remote control test. This inspection method is time-consuming and labor-intensive, and the motor will be burned if you are not careful. In the operating substation, the control circuit of the electric isolation switch is generally not tested. , such as a complete test, the busbar power failure is required. After the electric isolation knife switch control circuit fails, some handleable faults should be replaced with corresponding components, but the function verification cannot be carried out after the replacement. Some faults that cannot be handled, The electric isolating switch can only operate with a disease. The electric isolating switch is a very large number of equipment in the power system, and there are many incidents of failure of the secondary circuit.

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