State Grid's only 500kV intelligent upgrade was broken

On November 10th, from the only 500kV intelligent upgrade pilot substation of the State Grid - Jinhua 500kV Zhifu Transformer Field, the good news came, and the No. 3 main transformer successfully recommissioned after intelligent transformation, which is the After the successful implementation of the intelligent transformation of the pilot interval of 220 kV 10,000 KW and the 500 kV RANGE line, another major victory was marked by the intelligent upgrading of the station to the final stage.

It is understood that Zhifu Transform No. 3 main transformer will be suspended on October 20. This intelligent upgrade mainly includes transformer oil chromatography, ultra high frequency partial discharge, iron core current, arrester and other online monitoring and installation, and the configuration of the whole station is unified. The status monitoring background analysis software is embedded in the all-station integrated information platform for status monitoring and data analysis of the main transformer bay equipment. At the same time, a new low-resistance interval was added to the project, and high-voltage combined intelligent switches and smart components were used to realize the intelligence of the new equipment.

In 2009, the State Grid Corporation launched the first batch of nine pilot projects of intelligent substations. Zhifu Transformer is a 500 kV digital substation with the deepest degree of application of digital technology in China, the widest range of implementation, and the highest degree of digital protection. Thanks to its good digital basis, the station was selected and became the only pilot substation that upgraded the 500 kV voltage level intelligently. This upgrade will have an extremely important demonstration and guidance significance for the intelligent transformation of substations in the future.

The intelligent upgrading of Zhifu Transform mainly includes the intelligentization and on-line monitoring of a single device, the construction of an information integration platform, the intelligentization of operation and maintenance, the development of advanced applications, and the intelligent transformation of auxiliary systems, fully embodying the informationization of intelligent substations. Automated and interactive features. Through intelligent upgrading, the company has initially realized digitization of some equipment information, integrated functions, compact structure, state-of-the-art maintenance, and high-efficiency operation and maintenance, and achieved the goal of reducing operation and maintenance costs of substations, optimizing resource allocation, and improving operational indicators. According to the plan, the No. 3 main transformer, the 500-kilovolt range, and the 220-kilovolt-million line became pilot intervals.

At present, all three pilot interval equipment have been completely rebuilt, and some new technologies and new equipment have been applied one after another: 220 kV 10,000-million-space optical electronic transformers have replaced traditional electromagnetic transformers; multiple circuit breakers have achieved switching integration. Gate current, time, speed and SF6 micro-water, temperature, humidity and other online monitoring; No. 3 transformer realizes on-line monitoring of transformer oil chromatogram, ultra high-frequency partial discharge, iron core current, etc.; all arrester realizes on-line monitoring; 35 Thousand-volt high voltage combined intelligent switch put into operation; circuit breaker intelligent component application, secondary equipment realizes local installation and networking...

In addition, as the project continues to advance, the station's intelligent transformation projects include intelligent patrols, smart alarms, intelligent billing, intelligent robots, green lighting, rooftop photovoltaic power generation, intelligent temperature control room control and a series of new technologies and new equipment. Get applied.

In order to ensure the safe and smooth progress of the project, under the unified command of the provincial company, various relevant departments such as the Jinhua Electric Power Bureau formulated a complete construction plan and construction plan, carefully planned the safety, quality and progress of the project, and formed a unified command. , close cooperation, responsibility in place of the project system. At present, the work of the project is in an orderly manner and is expected to be put into operation at the end of the month.