Electric power system short circuit fault test device capable of precisely controlling short circuit time

Abstract

An electric power system short circuit fault test device capable of precisely controlling short circuit time comprises a quick short circuit eddy current drive breaker (1), three vacuum contactors (2), three quick eddy current drive breakers (3), three voltage transformers (4) and a connecting and disconnecting phase controller (5). One end of the quick short circuit eddy current drive breaker is connected to the ground, one end of each vacuum contactor is connected with one of three-phase lines of an electric power system, and the other ends of the vacuum contactors pass through the quick eddy current drive breakers and then are connected with the other end of the quick short circuit eddy current drive breaker to form a short circuit loop. One end of each voltage transformer is connected with one of the three-phase lines of the electric power system, and the other end of the corresponding voltage transformer is connected with the connecting and disconnecting phase controller. The other end of the connecting and disconnecting phase controller is connected with the other ends of all quick eddy current drive switches, voltage phase output signals on the low voltage sides of the voltage transformers are detected, and the quick eddy current drive breaker is controlled to be disconnected and connected. The electric power system short circuit fault test device can achieve the controllable voltage phase angle short circuit fault test.

Description

technical field [0001] The invention relates to a short-circuit fault test device of a power system, in particular to a short-circuit fault test device of a power system based on an eddy current-driven fast circuit breaker to precisely control the short-circuit time. Background technique [0002] After a short-circuit fault occurs in the power system, its short-circuit electromagnetic transient process has an important impact on the fast protection device of the power system (impedance protection is a kind of fast protection device), etc. To realize the performance detection of the protection device, it is necessary to accurately control the short-circuit time , in order to obtain the lower limit value of the protective device performance at the worst detection moment. At present, laboratory short-circuit fault test devices are mostly implemented by contactors, but the opening and closing times of contactors are highly dispersed, and it is impossible to achieve precise contr...

AI Technical Summary

Problems solved by technology

[0004] At present, there is no mature fault test device based on the eddy current drive fast circuit breaker to realize the precise control of the short circuit time in the market

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