摘要
本文论述了一种具有电流谐波补偿功能的单相并网分布式电源供电系统。系统模拟了电网含有大量谐波电流及电压畸变状况下的并网供电与谐波补偿。文章采用了不依赖于瞬时无功功率理论和低通滤波器的正序基波电压锁相,增强了锁相环的动态响应性能,从理论上消除了稳态误差,具有更好的实时性和准确性。并网逆变器采用无差拍控制单元,兼具谐波补偿与供电双重功能。基于Matlab的仿真模型和TMS320F28335的样机实验平台验证了该控制系统的有效性与合理性。
This paper discusses a single-phase grid-connected distributed power supply system with current harmonic compensation function. The system simulated the power supply and harmonic compensation function when the system contains a lot of harmonic current and distorted voltage. The paper builds a positive sequence fundamental voltage phase-locked hoop without using instantaneous reactive power theory or low-pass filter, which enhances PLL dynamic response, theoretically eliminates the steady state error, to be more real-time and accuracy. There is also no low-pass filter in harmonic extraction unit. Deadbeat control unit is used in grid-connected inverter, which can not only compen- sate the current harmonics but also mitigate the grid distortion induced by load current. The MATLAB simulation and the constructed experimental prototype verify the correctness and feasibility of the control system proposed.
出处
《电测与仪表》
北大核心
2013年第9期90-94,共5页
Electrical Measurement & Instrumentation
基金
国家高技本研究发展计划(863计划)资助项目(2012AA050206)
国网公司科技项目(12-12)
关键词
逆变器
并网
谐波补偿
锁相环
电能质量
inverter
grid-connected
harmonic compensation
phase-lock loop
power quality
