Laboratory test device and method for dynamic electric voltage recovery device

Abstract

The invention relates to laboratory testing device of a dynamic voltage restorer and a method thereof, wherein, the device comprises a single wire system main circuit, and an input signal of circuit is divided into three parallel signals: the first signal is grounded by a lighting arrester; the second signal is connected to the output end of the circuit by a by-pass switch; the third signal is connected with an isolation switch in series and then divided into two branches that are connected with output signals in parallel, wherein, one output signal is directly connected with the input end ofa thyristor, and the other output signal is connected with a fuse plug in series after being connected with a DVR switched switch; the fuse plug is connected with another fuse plug in series by beingconnected with a transformer in series, the output end of the fuse plug is connected with a power module in series, and the output end of the power module is connected with a filtering circuit which is connected with the thyristor in series; two output signals in the third signal are connected with each other in parallel and are then output after being connected with another isolation switch in series, and the output end of the third signal and the output end of the by-pass switch in the second signal are connected with each other in parallel at the output end of the circuit. The invention can be widely applied in various automation devices.

Description

technical field [0001] The invention relates to a test device and method, in particular to a dynamic voltage restorer (DVR) laboratory test device and method. Background technique [0002] With the development of science and technology, computers, frequency converters and various precision automation equipment have been widely used. While improving production efficiency, they also put forward higher requirements for the power quality of the power supply. Relevant surveys show that complaints about power quality due to voltage sags account for a large proportion of power distribution systems, especially in high-tech parks, large hospitals, military industrial units, and important government departments. DVR is a static series power quality adjustment device, which is mainly used to ensure the voltage stability of the user side when power quality problems such as power supply voltage drop, flicker, and interruption occur. By detecting the voltage on the power supply side and...

AI Technical Summary

Problems solved by technology

The development of high-voltage and large-capacity DVR requires very high test conditions. Taking the 2MVA with a small capacity as an example, to simulate on-site working conditions, a high-voltage three-phase large-capacity AC power supply, a large-capacity three-phase AC load, and supporting high-voltage Low-voltage switches and various protective equipment, the test cost is very high

Images