The result shows that identification of corona from internal and surface discharge is not so difficult;however identification of internal discharge from surface discharge is very hard and need to find new characteristic parameters of those two discharges.

Nowadays since the step of economic globalization keeps speeding up and China has joined WTO, the even faster development of foreign trade in central Jiangsu will depend on quickening the internal opening of the district, completely changing the concept of trade, efficiently making full use of foreign capital, actively building carrier of foreign investment and advancing the strategy.

Typical model design of partial discharge in transformer;

Identification and countermeasures for interference source at site of partial discharge test;

Research on the on-line monitoring system for partial discharge of hydro-generators;

Preliminary Study on Signal Extraction Technology for PD Pulse Based on Independent Component Analysis;

Study of bubble development in transformer oils based on PD measurement in negative point-plane gaps;

The PD Detection of GIS in Service Using UHF-Acoustic Method;