How to Commissioning of 3600kV Impulse Voltage Generator Test System

HIMALAYAL - SHANGHAI - CHINA

Abstract: Appropriate selection of instrument parameter helps to improve synchronization characteristic and efficiency of impulse voltage generator, generating impulse voltage waveform in accordance with the test criterion, hence guarantee efficient and reliable test result under the existing instrument condition.

Key words: High voltage electrical device; Impulse voltage generator; Synchronization characteristic

1.Foreword
Besides permanent working voltage, high voltage electrical device in power system is likely to bear instantaneous lightning and switching surge during operation, impulse voltage test is designed to examine insulating and protection performances of various high voltage electrical device under the impact of lightning voltage and overvoltage. In order to improve sensitivity and reliability of 3600kV impulse voltage generator, upgrading and transformation have been conducted to the instrument control system and measuring system applying OMRON CJ series PLC centered new control system.

2.Working principle of impulse voltage generator
2.1Structure principle
Impulse voltage generator generates impulse high voltage via parallel charging and series discharge of capacitors. Impulse voltage generator generates both lightning impulse and switching impulse, impulse voltage generator normally comprises 5 components: rectification and charging power supply conducts remote control of performance characteristics of all structural element with parallel capacitor charging control system, measurement system measures performance characteristics and output waveform characteristics of impulse voltage generator and transfers data to the control center, voltage impulse generator is designed to generate different impulse voltage waveform and conduct signal transmission between components of the system in accordance with test requirements