神经元PID电压空间矢量技术在DSTATCOM中的应用

Application of neuron-PID and voltage space vector control technology in DSTATCOM

针对配电网无功功率补偿和电压质量改善的需求,本文提出一种配电网静止同步补偿器(DSTATCOM)电流控制的新方法—基于神经元PID直接电流控制。该方法通过简单的代数运算获取电流指令信号,并具有一定的自适应自学习能力。针对直接电流控制开关频率过高的不足,本文引入了电压空间矢量技术,分析了电压空间矢量在DSTATCOM中的应用原理,并引入r1 r2 r3坐标系计算矢量作用时间和区域。实验结果验证了神经元PID电压空间矢量技术在DSTATCOM中应用的有效性。

In order to satisfy the requirements of reactive power compensation and to improve voltage quality in distribution network, the direct current control strategy based on neuron-PID and the modulation method based on SVPWM for distribution static synchronous compensator （DSTATCOM） are proposed. The current instruction can be easily obtained by simple algebraic operation and this method has certain adaptive learning ability. Distribution static synchronous compensator based on neuron-PID direct current control strategy can compensate system reactive power, improve power factor, and keep the DC side voltage stable effectively. In order to eliminate the negative effect of high switching frequency brought by direct current control, voltage space vectors control method is used. The application principle of voltage space vectors is studied and r1r2r3 coordinate system is introduced which is used to calculate function time and area. Experiments have proved the validity of SVPWM technology and neuron- PID applied to distribution static synchronous compensator （DSTATCOM）.