基于实测数据的谐波负荷模型控制策略  

Control Strategy Analysis of the Harmonic Load Model Based on Measured Data

作　　者：尹志勇[1] 陈永光[2] 刘正春[1] 刘洪文[1] 解璞[1] YIN Zhiyong CHEN Yongguang LIU Zhengchun LIU Hongwen XIE Pu(Ordnance Engineering College, Shijiazhuang 050003, Hebei Province, China Institute of Tracking and Telecommunications Technology, Haidian District, Beijing 100094, China)

机构地区：[1]军械工程学院,河北省石家庄市050003 [2]北京跟踪与通信技术研究所,北京市海淀区100094

出　　处：《电网技术》2016年第10期3192-3198,共7页Power System Technology

基　　金：国家自然科学基金项目(51307184)~~

摘　　要：负荷建模对维护电力系统的安全稳定运行有重要意义。提出一种基于实测数据和谐波发生机理的谐波负荷模型,在分析实测数据的基础上,将受控电流分解为基波与谐波分量分别控制。谐波电流采用基于电压前馈解耦的双闭环控制策略,保证运行过程中的功率平衡和稳定性;提出一种改进型的准PR双谐振控制方法对dq0轴谐波电流进行跟踪控制,能够同时控制2个相邻的奇次谐波,在满足控制精度的同时有效简化了控制器。仿真结果表明,模型控制策略具有较高的精准度和快速性,且模型电路结构利用现有技术可方便实现,实用性较高。Load modeling is significant for power system safety and stability. A harmonic load model based on measured data and harmonic generation mechanism is proposed in this paper. Based on analysis of measured data, controlled current is decomposed to fundamental and harmonic components controlled respectively. Dual-loop control strategy with voltage feed-forward decoupling is adopted to control harmonic currents to guarantee power balance and stability. A quasi-PR double resonance control method is proposed for controlling trace of dq0-axis harmonic currents, with which two adjacent odd harmonics can be controlled simultaneously. Consequently the controller is simplified and control accuracy is satisfied. Simulation results show that the control strategy has higher accuracy, rapidity and practicability, because the model circuit structure can be easily achieved with current technology.

关 键 词：谐波负荷 实测数据 双闭环控制策略 准PR双谐振控制 电压前馈解耦 Clark变换 

分 类 号：TM711[电气工程—电力系统及自动化]