Insulation grounding fault simulation unit

Abstract

The invention belongs to the field of the operation and maintenance monitoring of substation direct-current power source systems and relates to an insulation grounding fault simulation unit. The insulation grounding fault simulation unit comprises a main control chip, a voltage acquisition module, a communication module, a bus-bar and branch input control module, a busbar and branch insulation reduction and grounding control module, an alternating-current intrusion control module, a direct current mutual intrusion control module, and a ground distributed capacitance increasing module; the voltage acquisition module and the communication module are both connected with the main control chip; the bus-bar and branch input control module is connected with the busbar and branch insulation reduction and grounding control module; and the busbar and branch insulation reduction and grounding control module, the alternating-current intrusion control module, and the direct current mutual intrusioncontrol module are connected with the main control chip through an optocoupler isolation module. With the insulation grounding fault simulation unit of the invention adopted, the automatic simulationof various faults of a direct-current power source can be realized, the ability of operation and maintenance personnel to check and solve problems can be improved, and the safe operation of a substation can be ensured.

Description

technical field [0001] The invention relates to the field of operation and maintenance monitoring of DC power supply systems in substations, in particular to an insulation and grounding fault simulation unit. Background technique [0002] The DC power supply system is an important power supply for substation control and protection, automation devices, high-voltage circuit breaker opening and closing mechanisms, signal equipment, emergency lighting and other equipment, and is an important equipment for substations. As the "heart" of the substation, the DC power system is crucial to the safe and reliable operation of the substation. System failure may cause the entire substation to lose power, endangering the safe operation of the substation and the power grid. [0003] In recent years, the industry has recognized the importance of safe and reliable operation of DC power systems. After the AC power failure, the DC power system is faulty and cannot provide safe and reliable po...

AI Technical Summary

Problems solved by technology

[0004] At present, there are many types of faults in the DC power supply system, among which insulation and grounding faults may cause malfunctions of protection and automatic devices, cause relay protection, signals, and automatic devices to malfunction or refuse to operate, cause DC fuses to blow, and cause protection and automatic devices, The control circuit loses power, what's more, it will cause some relays to be short-circuited, unable to operate normally, causing leapfrog tripping, and causing the accident to expand

Insulation and grounding faults occur frequently in substations, and the speed of maintenance and resolution is slow, resulting in problems that cannot be solved effectively and quickly

Images