Success Case

Project Background As the demand for power reliability continues to grow, ensuring the safe operation of high-voltage switchgear has become a top priority in modern substations. Partial discharge (PD) is a critical early-warning signal of insulation degradation, which, if undetected, may lead to insulation breakdown, equipment failure, or even large-scale outages. To enhance equipment reliability,

Yunnan Power Supply Bureau employs high-voltage live partial discharge display terminals to monitor high-frequency pulse current signals coupled from 10kV middle-mounted switchgear and ring main units. This monitoring approach enables real-time detection of partial discharge activity, supporting early fault diagnosis and enhancing the reliability of the power distribution network.

Zhuhai Huawang Technology has deployed over 2,000 partial discharge sensors across the Jiangsu Power Supply Bureau. At a 220kV substation in Jiangsu, ultra-high frequency (UHF) sensors and integrated three-in-one sensors are utilized for comprehensive real-time monitoring of partial discharge activity. This advanced monitoring system enables timely detection of insulation defects, contributing to improved equipment reliability

On May 16, 2019, Zhuhai Huawang Technology performed live partial discharge detection on 10kV high-voltage switchgear at a 220kV substation in Heilongjiang. The inspection utilized ultra-high frequency (UHF), ultrasonic, and transient earth voltage (TEV) detection methods to ensure comprehensive assessment of equipment condition. During the on-site inspection, a persistent ultrasonic partial discharge signal was detected

On May 9, 2020, Zhuhai Huawang Technology carried out live partial discharge detection on a 10kV cable in Lhasa, Tibet. The inspection identified abnormal partial discharge activity in the Bianjiang 142 circuit breaker cabinet. During the on-site testing process, noise interference was effectively eliminated by adjusting the trigger threshold. This allowed clear capture of the

On June 5, 2019, a live inspection was conducted on Pole No. 01 of a 10kV line operated by Jiangxi State Grid Power Supply Bureau. Ultrasonic abnormalities were detected during the inspection. When the line was powered down for further examination, it was found that the cable connection terminal inside the cable chamber was positioned

This project involved the installation of a total of 151 sensors at a 110kV substation in Fujian Province. The deployment included 38 ultra-high frequency (UHF) sensors, 113 3-in-1 partial discharge sensors, 3 high-frequency current sensors (HFCT), and 23 data concentrators. During the monitoring process, partial discharge activity was detected in the 110kV GIS disconnector. The

Project Overview To enhance the intelligence and reliability of power system operations, a substation in Hunan has implemented a comprehensive partial discharge (PD) online monitoring solution provided by Zhuhai Huawang Technology Co., Ltd. The project focuses on critical assets such as power transformers, switchgear, and surge arresters. It features the deployment of advanced sensing technologies and

Project Site: State Grid Xinjiang 750kV Wubei Substation The project was launched in Xinjiang in 2021, involving the installation of partial discharge monitoring systems on all circuit breakers and GIS equipment at the 750kV substation. The implementation has achieved excellent results. UHF Partial Discharge Online Monitoring Partial discharge generates ultra-high frequency (UHF) electromagnetic waves. The