Research on the New Power Phase Modifier for Stabilization of the Transmission Line having Instanteneous Compensation Ability.

介绍了一种利用旋转电机和电流控制PWM逆变器构成的输电线路瞬时有功无功功率控制系统。该系统不仅能补偿谐波、闪变、不平衡等电力畸变分量，而且能补偿有功、无功电流的瞬时变化和短时停电。具有与绕线转子感应电机相同的结构的旋转电机具有用于能量存储元件的飞轮。通过激励旋转电机的次级绕组，上述电力线的所有失真分量可以由小容量PWM逆变器补偿。因此，该系统具有很好的经济性，适用于输电线路的谐波补偿和振荡抑制，并通过10 KVA的仿真模型验证了该系统对电网稳定的有效性。实验仿真系统表明， 关于我们 翼的结果。1.采用多并联PWM逆变器，在相同的开关频率下，谐波电流可降低25%。它可以实现高速电流和高功率控制。2. PWM逆变器的容量可以减少约20%的传统的有源滤波器系统。由于功率流单一，变换器可以用二极管桥来构成。3. 90%的有功功率来自飞轮的机械能。4.该系统可以补偿13次谐波以下的频率分量，包括随机闪变分量。5.有功功率的频率响应与电流控制器的响应几乎相同，电流控制器的响应取决于开关频率和逆变器容量。6.利用由L、C、负载和同步电机组成的输电线路模拟器，对线路振荡的补偿能力进行了校核。有功功率的平滑控制对阻尼作用表现出较好的特性。少

An instanteneous active and reactive power control system on the power transmission line using a rotating machine and a current control PWM inverter is described. The system can compensate not only the power distortion component such as harmonic,flicker and unbalance components but also transient change of active and reactive currents and short time power-off. The rotating machine, which has the same structure as a wound-rotor induction machine, has a flywheel for the energy storage element. By exciting the secondary winding of the rotating machine, all of the distortion components of the power line described above can be compensated by the small capacity PWM inverter. Therefore the system is very economical and fits for the compensation of the harmonics and the suppression of the oscilation of the transmission lines.The research confirmed the validity of the system to the power network stabilization by using a 10 KVA simulation model. The experimental simulation system shows the follo … More wing results. 1. By using the multi-parallel connection PWM inverter, the harmonic current can be reduced to 25% under the same switching frequency. It enables the high speed current and high power control. 2. The capacity of the PWM inverter can reduce about 20% that of the conventional active filter system. The converter can be constructed by using the diode bridge because of the single power flow. 3. 90% of active power is fed from the mechanical energy of the flywheel. 4. The system can compensate under 13-th harmonic frequency components including random flicker component. 5. The frequency response of the active power is almost same as the response of the current controller which depends on the switching frequency and the inverter capacity. 6. By using a transmission line simulator composed of L, C, loads and a synchronous machine, the compensation ability of the oscilation of the line is checked. The smooth control of the active power shows fairly good characteristics to the damping action. Less