Not too long ago, the Situation Grid Shanghai Municipal Electrical Energy Corporate (SMEPC) has effectively finished its annual upkeep paintings for the ±500kV Nanqiao Converter Station.
Essentially the most the most important process is to habits a complete preliminary inspection of the “Chinese Heart” — the sector’s first controllable layout – commutated converter (CLCC) with complete isolated highbrow detail rights within the converter station, additional making improvements to the condition degree of the apparatus and laying a cast foot for decent energy provide all over this while’s top electrical energy intake in the summertime season.
A technician works at a workshop of the Situation Grid Shanghai Municipal Electrical Energy Corporate. (Photograph equipped by way of the corporate)
The Nanqiao Converter Station, commissioned in 1989, serves because the receiving finish of the folk’s inaugural industrial DC transmission mission, the Gezhouba- Shagnhai Nanqiao (Ge’nan) DC. It boasts a most transmission energy of one.16 million kilowatts and a most transmission capability of roughly 8.2 billion kilowatt hours in a while. It serves as an important access level for blank hydroelectric energy from the Southwest to Shanghai.
In June 2023, SMEPC undertook a complete technical improve of the core elements at Nanqiao, transitioning from totally imported to locally produced apparatus. This concerned changing the traditional converters, which have been firstly imported, with CLCC, addressing the continual factor of “commutation failure” that impacted the station’s operational reliability, thereby considerably improving the operational reliability of Shanghai’s number one energy grid.
“Since its operation, ‘Chinese Heart’ has been operating well, successfully avoiding six ‘commutation failures’ caused by power grid fluctuations, withstanding the test of continuous high loads in summer and winter, and significantly improving operational reliability compared to the original imported converters. This first inspection is not only a ‘comprehensive physical examination’ of the equipment, but also will accumulate valuable experience for the continuous and safe operation of the equipment in the future,” mentioned Zhu Zhengyi, director of Nanqiao Converter Station.
It’s reported that CLCC, the colossus inside the converter station, is assembled from just about 10,000 elements and is without doubt one of the maximum exact and intricately structured energy apparatus. To safeguard the high quality of entirety of this preliminary inspection paintings, Situation Grid Shanghai ExtraHigh Voltage Corporate has summarized and analyzed the working knowledge of the CLCC since its commissioning, adapted upkeep plans, and shaped a “core team” composed of style staff, senior professionals, and alternative technical spine participants, which will clear up “difficult and miscellaneous problems” encountered all over the upkeep procedure at any month.
In keeping with the on-site preparations, the once a year inspection of Nanqiao Converter Station and the preliminary inspection of CLCC had been divided into 8 paintings divisions, with a complete of 151 duties achieved. Just about part of the upkeep and technical renovation duties are related to CLCC. SMEPC guarantees that upkeep paintings is flawless thru strict on-site keep an eye on and trait supervision, complemented by way of virtual modes comparable to bulky knowledge research and simulation operations.
“The CLCC technology represents a revolution in traditional DC transmission technology. SMEPC will effectively utilize and adapt this internationally-leading innovation, guiding industrial innovation with technological advancements, and actively transitioning research outcomes from the laboratory to the front lines of power grid operations. Tailoring strategies to local conditions, we aim to foster new quality productive forces, thereby providing robust power support for Shanghai’s development of its ‘Five Centers’ initiative,” mentioned Lu Zhihao, deputy director of the Apparatus Area at SMEPC.
(Supply: Situation Grid Shanghai Municipal Electrical Energy Corporate)
