大型同步调相机转子故障温度场分析

Temperature field analysis of rotor fault in large synchronous condenser

随着特高压交直流输电的发展,同步调相机以其快速动态响应能力受到广泛关注。文中以TTS-300-2型双水内冷同步调相机为研究对象,建立了调相机转子三维模型,计算并分析了转子不同负荷下、同一位置处不同水路堵塞程度时的转子三维温度场,转子匝间短路和水路堵塞同时存在时的温度场以及转子水路堵塞时的热应力情况,评估故障产生的影响和同步调相机带病运行能力。结果表明,不同负荷下转子温度场分布相似;转子出现故障会导致温度分布不平衡;单个槽内堵塞匝越多,转子温度场畸变越明显,且随着堵塞程度的增加,转子热应力也增加。

With the development of UHV AC/DC transmission,synchronous condenser has been paid more and more attention because of its fast dynamic response ability.The safe operation of synchronous condenser is related to the stability of power grid.Taking TTS-300-2 dual water cooled synchronous condenser as the research object,and a three-dimensional model of its rotor is established.The three-dimensional temperature field of the rotor is calculated and analyzed under different loads and degrees of water blockage at the same position.The temperature field of the rotor with interturn short circuit fault and water blockage fault are calculated and analyzed.The thermal stress of the rotor with water blockage fault is also studied.Based on the analysis,the impacts of these faults and the ability of the synchronous condenser to operate are evaluated.The results show that the distribution of rotor temperature field is similar under different loads.Rotor fault leads to unbalanced temperature distribution.The more turns of blockage in a single slot,the more obvious temperature distortion of the rotor.The thermal stress of rotor increases with blockage degree.