改进型PR控制器在岸电中的研究与工程示范

发布时间：2018-06-08 07:32

本文选题：变频电源 + 船用岸电　；参考：《电力电子技术》2017年03期

【摘要】：提出一种基于比例积分(PI)结合改进型比例谐振(PR)控制的空间矢量脉宽调制(SVPWM)的控制方法。传统变频电源一般采用基于PI控制的电压电流双闭环控制方法,但该控制在三相静止坐标系下跟踪正弦参考指令电流很难消除静态误差。而通过PR控制器可对特定频率下的交流指令进行无静差跟踪,将传统矢量控制下的有功和无功电流分量转换到静止坐标系下,避免了繁琐的计算。仿真和实验表明,通过此方法调节时,只需设置控制器谐振频率为电网电压基波角频率,即可实现基波电流无静差跟踪,比传统电压定向矢量控制方式更简单,且相较PI控制谐波含量小,电压畸变率明显降低,提高了控制系统的鲁棒性和电网电能质量。
[Abstract]:This paper presents a control method based on proportional integration (Pi) and modified proportional resonance (PRP) control for SVPWM (Space Vector Pulse width Modulation). The traditional frequency conversion power supply usually adopts the voltage and current double closed loop control method based on Pi control, but it is difficult to eliminate the static error by tracking the sinusoidal reference instruction current in the three-phase static coordinate system. The PR controller can track the AC command at specific frequency without static error, and the active and reactive current components under the traditional vector control can be converted to the stationary coordinate system, thus avoiding the tedious calculation. The simulation and experiment show that when the controller resonance frequency is set as the fundamental voltage angle frequency of the power network, the static error tracking of the fundamental wave current can be realized, which is simpler than the traditional voltage-oriented vector control method. Compared with Pi control, the harmonic content is smaller and the voltage distortion rate is obviously reduced, which improves the robustness of the control system and the power quality of the power network.
【作者单位】：平高集团有限公司;北京平高清大科技发展有限公司;
【分类号】：U653.95

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