Multifunctional load circuit frequency converter test platform and experiment method thereof

Abstract

The invention discloses a multifunctional load circuit frequency converter test platform. The platform comprises a control system and an upper computer which are connected with each other, and a to-be-tested frequency converter connected with a daily power grid. The output end of the frequency converter is connected with a PWM filter, the output end of the PWM filter is connected with an externalload through a load wire, and the load wire is sequentially provided with a first circuit breaker, a short circuit device, a grid-connected connection device connected with a daily power grid and a second circuit breaker in the direction away from the PWM filter. The control system comprises a circuit breaker controller, a current and voltage measurement module, a harmonic detection module, a PPBmodulator, an oscilloscope and a temperature detection module. A variable-frequency circuit breaker is connected in parallel to the direct-current bus; the load wire is connected with the current andvoltage measurement module at the first circuit breaker through a wire, and the wire is connected with the harmonic detection module at the first circuit breaker through a wire. The invention also discloses a test method of the platform.

Description

technical field [0001] The invention relates to a multifunctional load circuit frequency converter test platform and an test method thereof. Background technique [0002] In traditional industrial production, frequency converters are mainly used to control motors. With the continuous advancement of science and technology, frequency converters are used more and more widely, and have become an indispensable part in the shipbuilding industry. For users, if they want to ensure the stable operation of the inverter, they have high requirements on the performance of the inverter. Therefore, various performance testing tests of the frequency converter are essential. [0003] When the frequency converter is used as a ship power supply, it is generally necessary to provide fault selectivity requirements. Specifically, when the load of the ship is short-circuited, the traditional protection measure is to cut off the short-circuit point through the circuit breaker, but a large current...

AI Technical Summary

Problems solved by technology

Under the background of the rapid development of modern science and technology, the single-function test platform can no longer meet the requirements of enterprise factories, and the test platform with high utilization rate and rich functions is the development trend of modern equipment

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