摘要
为使共直流母线并网逆变器并联系统(GIPS)实现理想无环流运行状态,各并联单元输出的脉宽调制电压波形需要保持一致,也就是各并联单元驱动信号需保持同步。借助并联系统各单元驱动信号的同步约束规律,可容易将被提出的H桥死区消除正弦脉宽调制应用于共直流母线GIPS,从而避免死区效应对并网电流的影响。由数字信号处理器与现场可编程门阵列结合的数字控制系统易于实现所提出的并联运行方式。实验结果验证了所提控制方法的运行特点与有效性,GIPS基本能够实现无环流运行状态并且在整个运行阶段无需设置死区时间。
Keeping no difference in the instantaneous output pulse width modulation(PWM)voltages of parallel inverters was the ideal operation status of a gridconnected inverter parallel system(GIPS)to achieve no circulating current among parallel inverters.In other words,the gate control signals for switches in parallel inverters should be synchronized.By means of the uniform constraint of the gate control signals for switches,the Hbridge deadtime elimination sinusoidal pulse width modulation(SPWM)presented can be easily applied to GIPS with common DC link.Thereby,the influence of the current by dead time can be avoided.The proposed operation method is easy to be implemented on the digital control board using digital signal processing(DSP)and fieldprogrammable gate array(FPGA).The experimental results are presented to demonstrate the validity and features of the proposed operation method.GIPS can basically achieve no circulating current among parallel inverters,and the deadtime isn't necessary within the entire running time.
作者
宋春伟
郭永洪
曾正
孙丽宏
SONG Chun-wei;GUO Yong-hong;ZENG Zheng;SUN Li-hong(College of Modern Science and Technology’ China Jiliang University, Hangzliou 310027,China;State Key Laborato+ of Power Transmission Equipment & System Security and New Technology, Chongqing University,Chongqing 400044,China)
出处
《电机与控制学报》
EI
CSCD
北大核心
2017年第12期9-16,共8页
Electric Machines and Control
基金
浙江省自然科学基金青年基金项目(LQ16E070001)
浙江省"仪器科学与技术"重中之重学科开放基金(JL150512)
输配电装备及系统安全与新技术国家重点实验室访问学者项目(2007DA10512716417)
关键词
共直流母线
并联
并网逆变器
环流
死区
common DC link
parallel
grid-connected inverter
circulating current
dead time
作者简介
宋春伟(1987—)，男，博士，讲师，研究方向为大容量变流器拓扑与控制；;郭永洪(1967-)，女，博士，副教授，研究方向为先进控制算法；;曾正(1986-)，男，博士，讲师，研究方向为电力电子器件与新能源发电；;通信作者：孙丽宏(1977-)，女，硕士，讲师，研究方向为微电网与能源互联网。
