The reporter learned from the State Grid Qinghai Suzhou Electrical Apparatus Science Academy Co.Ltd(300215) on the 27th that recently, in the Butuo converter station at an altitude of 2600 meters in Liangshan Prefecture, Sichuan, China’s first on-site no-load test of million KVA main transformer was successfully completed, marking that the no-load test equipment in the high-voltage test hall of Qinghai Suzhou Electrical Apparatus Science Academy Co.Ltd(300215) high sea pull high voltage laboratory can be used in the test hall, It also has the ability of long-distance transportation and carrying out no-load test of large transformer on site.
The core test equipment of the on-site no-load test is the 5000 kW variable frequency power supply provided by the State Grid Qinghai Suzhou Electrical Apparatus Science Academy Co.Ltd(300215) . In the early stage, the equipment has completed the factory test of several ± 800 kV ring rheometers and 750 kV main transformers in high altitude areas.
The on-site no-load test is of great significance to assess the core assembly process and performance of Large Transformers after on-site assembly. At the same time, it can also be used to diagnose the power failure of abnormal transformers and check the abnormal heating and other problems.
The on-site no-load test of 500 kV main transformer in Butuo converter station, the tested transformer is a three-phase integrated transformer with a voltage of 500 kV and a capacity of 1000 kVA. In order to solve the problem of inconvenient transportation, the on-site assembly method is adopted. After the factory test is completed in the factory, it is disassembled and then transported to the site for re assembly. In order to assess whether the performance of the transformer assembled on site meets the requirements, the on-site no-load test is carried out.
“This test creates a precedent for on-site no-load test of large capacity transformer in high-altitude areas, and has important engineering application value and demonstration significance. It provides a successful model for on-site similar tests in the later stage. It plays a very important role in clean energy consumption and transmission and ensuring the stable operation of power grid, and has important engineering application value and demonstration significance.” Yang xiaoku, head of State Grid Qinghai Suzhou Electrical Apparatus Science Academy Co.Ltd(300215) , said. (end)
