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A performance test device for hybrid DC solid-state circuit breakers

A solid-state circuit breaker and testing device technology, applied in circuit breaker testing and other directions, can solve problems such as difficulty in arc extinguishing, and achieve the effect of improving design

Active Publication Date: 2017-05-24
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Since there is no current zero-crossing point in the DC system, it is difficult to extinguish the arc

Method used

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  • A performance test device for hybrid DC solid-state circuit breakers
  • A performance test device for hybrid DC solid-state circuit breakers

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] The performance test device for the hybrid DC solid-state circuit breaker proposed by the present invention has a schematic structural diagram as shown in figure 1 As shown, it includes: three-phase circuit breaker 1, transformer 2, rectifier 3, current limiting resistor 5, first load switch 4, charging capacitor bank 6, second load switch 7, discharge resistor 15, discharge inductor 16, resistor divider Device 8, first shunt 17, fuse 9, high-speed camera 10, computer 18, displacement sensor 19, oscilloscope 21, high voltage differential probe 22, second shunt 23, third shunt 24, fourth shunt 25. One end of the three-phase circuit breaker 1 is connected to the external three-phase AC power supply of the performance testing device, and the low-voltage side of the transformer 2 is connected to the other end of the three-phase circuit breaker 1 . The rectifier 3 is connected to the high voltage side of the transformer 2, and the charging capacitor bank 6 is connected to th...

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Abstract

The invention relates to a performance test device of a mixed-type direct-current solid-state breaker, and belongs to the field of high voltage and large current experiments. The performance test device comprises a rectifier, a charging capacitor set, a high-speed camera, a displacement sensor, an oscilloscope, a high-voltage differential probe, a current divider and the like. By means of changes of the number of capacitors in series-parallel connection, a capacitance value of the capacitor set is changed. The high-speed camera is connected with a computer and is used for shooting the motion process of a quick mechanical switch contact and a pull rod in the switching-off and switching-on processes. The displacement sensor is used for measuring the motion speed of a quick mechanical switch pull rod and a contact. The current divider is used for measuring currents flowing through a discharging circuit, a power electronic branch circuit, a buffer and a voltage limiter. The high-voltage differential probe is used for testing the serial-connection voltage sharing effect of each power electronic component. The oscilloscope is used for displaying a test result. The performance test device meets requirements for different parameters in the development process of the mixed-type direct-current solid-state breaker and provides a quantization basis for work performance analysis.

Description

technical field [0001] The invention relates to a performance testing device for a hybrid DC solid-state circuit breaker, belonging to the technical field of high-voltage and high-current experiments. Background technique [0002] Because there is no current zero-crossing point in the DC system, it is difficult to extinguish the arc. With the development of power electronics technology, hybrid DC solid-state circuit breakers based on high-power power electronic devices have become an important technical solution for quickly breaking DC current. The hybrid DC solid-state circuit breaker is composed of power electronic devices and mechanical switches connected in parallel. During normal operation, the power electronic devices are disconnected and the mechanical switches carry the load current. When the system fails, the mechanical switch is disconnected, and the fault current is transferred to the power electronic branch after a period of time under the action of the arc volt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/327
Inventor 曾嵘孙为民余占清陈名黎小林赵宇明吕纲陈振宇朱童
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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