电气化铁路瞬时无功理论及检测研究

The Transient Reactive Power's Theory and Detection on Electric Railway

以三相电路瞬时无功理论为基础 ,针对电气化铁路三相供电单相用电、冲击性负荷不平衡和负荷电流近似为方波的特点 ,将单相负荷电流分解为基波分量和谐波分量 ,基波分量再分为有功分量与无功分量 ,直接进行酉变换构造二相 ,延时仅为 90° ;并据此设计出无功 /有功电流检测电路 ,运用Matlab下的Simulink工具箱进行了仿真验证 .

Based on the discussion of the transient reactive power's theory in connection with the electric railway's characteristics of single phase load with three phases power, punching load with unbalance, and that load's current is similar to square, single load current is decomposed into harmonic and fundamental and fundamental is decomposed into active power and reactive power too. It's 90 degrees time delay that structured double phases through unitary transformation directly. According to this, we designed circuit of detecting reactive or active and proceeded the test of simulation by Simulink systems.