针对目前电气化铁道使用的斯科特变压器和阻抗匹配变压器的缺点以及同相供电系统补偿电流实时检测方法的不足,提出了基于Y/＞/▽平衡变压器的同相牵引供电系统方案.分析了Y/＞/▽平衡变压器平衡变换条件,给出了无锁相环补偿电流实时检测方法,且采用MATLAB/Simulink搭建整个系统的仿真模型.在仿真系统中,用信号发生器产生与电源电压同频同相的正、余弦信号；在实验系统中,采用查询正、余弦表的方法产生与电源电压同频同相的正、余弦信号,取消了锁相环的使用.结果表明,所提同相供电方案实现了三/单相的综合补偿,无锁相环补偿电流实时检测提高了补偿电流实时检测的准确性.%Aiming at the shortcomings of Scott transformer and impedance-matching transformer applied in electrified railway and the insufficiency of real-time compensating current detection methods adopted in the co-phase traction power supply system,a solution based on Y/>▽ balanced transformers is put forward. The conditions of its balanced transformation are analyzed and the real-time detection method of compensating current without phase locked loop is given. Its simulation model is established with MATLAB/ Simulink. The sinusoidal and cosine signals with the same frequency and phase as power voltage,are produced by signal generator in the simulation system,and produced by inquiring sinusoidal and cosine table without phase locked loop in the experiment system. Results show that,the three/single-phase comprehensive compensation is achieved and the accuracy of real-time compensating current detection without phase locked loop is enhanced.
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