Electric power system 1:1 voltage class distribution network single-phase ground fault simulation test platform

Abstract

The invention discloses an electric power system 1:1 voltage class distribution network single-phase ground fault simulation test platform. The electric power system 1:1 voltage class distribution network single-phase ground fault simulation test platform comprises a neutral grounding module, a 10 kV bus, a 10 kV pi-type equivalent model electric transmission line module and a single-phase ground fault module. The electric power system 1:1 voltage class distribution network single-phase ground fault simulation test platform can dynamically simulate a single-phase ground fault of an overhead line of different lengths and a cable line of a distribution network in a 1:1 voltage class. The electric power system 1:1 voltage class distribution network single-phase ground fault simulation test platform can simulate different neutral grounding modes, such as neutral ungrounding, neutral low-resistance grounding and neutral grounding through an arc suppression coil; transmission lines of different lengths and different types can be simulated, such as the overhead line or the cable line; single-phase ground faults of various types can be simulated, such as metallic grounding, arc light grounding, high resistance grounding and the like; meanwhile, the electric power system 1:1 voltage class distribution network single-phase ground fault simulation test platform is provided with a distribution network fault indicator, a line selection and fault positioning device and ports of a DTU / FTU and other distribution network automation terminals, and the requirements for scientific researches, product development, product testing and related personnel operating training in directions of the distribution network single-phase ground fault line selection, traveling wave distance measurement accurate positioning and the like are met.

Description

technical field [0001] The invention relates to a power system fault simulation test platform, in particular to a power system 1:1 voltage level distribution network single-phase ground fault simulation test platform. Background technique [0002] More than 90% of the faults in the power system occur in the transmission line, so the transmission line is the weakest link in the power system and the link with the most frequent faults, and it is extremely difficult to find faults. Most of my country's distribution network systems adopt low-current grounding systems. According to reliable statistics, single-phase grounding faults account for more than 80% of line faults. When a single-phase ground fault occurs in the transmission line of the distribution network, because the fault current is relatively small, and the three-phase line voltage remains symmetrical, the impact on the power supply of the load is also small, so it is usually allowed to continue to operate. However, w...

AI Technical Summary

Problems solved by technology

There are many fault location products such as line selection products and fault indicators on the market, and their true accuracy is far lower than their publicized indicators

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