Capacitor element withstand voltage test and performance measurement device and method

Abstract

The invention discloses a capacitor element withstand voltage test and performance measurement device and method. A direct-current power supply of the device is used for transmitting withstand voltage test direct-current voltage to a tested capacitor element; a contactor KM1 is used for controlling whether the tested capacitor element is connected with the withstand voltage test direct-current voltage or not; a contactor KM4 is used for controlling whether the grounding end of the tested capacitor element is grounded or not; and an LCR digital bridge is used for measuring the impedance, capacitance and inductance of the tested capacitor element. According to the invention, a high-voltage test unit and a low-voltage measurement unit are safely and smoothly switched by adopting an electrical method, the capacitance value and the dielectric loss are automatically read, the test time is saved, and the working efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of high-voltage electric power and low-voltage electric control, in particular to a capacitor element withstand voltage test and performance measurement equipment and method. Background technique [0002] With the increasing scale of new energy power generation such as photovoltaics and wind power, flexible DC transmission projects are also increasingly being put on the agenda. Flexible DC transmission technology has the advantages of suppressing harmonics, reducing reactive power compensation capacity, and avoiding commutation failures. It is the current A major direction for the development of power transmission and distribution technology. [0003] DC support capacitors, also known as DC-link capacitors, are used in flexible DC transmission, mainly to absorb high-amplitude pulsating currents from inverters to DC-Link, and prevent them from generating high voltage on the impedance of DC-Link. The amplitud...

AI Technical Summary

Problems solved by technology

The existing voltage withstand test of capacitor components is to pressurize the components with a DC power supply first, then discharge the components after completion, and then go to manual measurement. Since the voltage level of the test is relatively large, from 1.1 times the rated voltage to 2 times the rated voltage, It needs to be disassembled and measured back and forth. This method is not only inefficient, but also has potential safety hazards during the operation of personnel.

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