A group of three 500 kV, 50,000 MVA single-phase AC controllable reactors, independently developed by Xi'an Xidian Transformer Co., Ltd., has completed the design phase and is set to enter mass production. These advanced reactors have achieved international leading technical standards and have received preliminary approval for their invention patent application from the State Intellectual Property Office.
As ultra-high voltage (UHV) power grid construction continues to expand, long transmission lines require high-voltage reactors to limit power frequency and operational overvoltage. However, traditional shunt reactors are not adjustable. When transmission power approaches or exceeds the natural power level, system voltage drops, which can compromise grid stability, power quality, and transmission capacity.
The graded controllable shunt reactor developed by Xi'an Xidian offers significant advantages, including easy adjustment, fast response time, no harmonic generation, low noise, minimal vibration, and reduced losses. It is particularly suitable for long-distance transmission in UHV and EHV power grids, offering superior performance and promising market potential.
It is reported that this high-tech product has already been ordered by the State Grid Corporation for the 500 kV switch station in Yinzhou, Shanxi. The project is expected to be completed by the end of May 2006, marking a major step forward in China's UHV infrastructure development.
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