摘要
针对带整流器负载的微电网高频谐振问题,采用基于导纳的Bode稳定性判据进行理论分析,提出一种逆变器输出电流经过比例系数正反馈到电流给定的有源阻尼控制策略,可有效降低逆变器等效输出阻抗,提高系统的稳定裕度。针对整流器负载导纳的谐振峰值,提出虚拟电阻的控制策略,可有效抑制其谐振峰值,提高带整流器负载的微电网系统的稳定性。最后利用PSCAD/EMTDC仿真软件,验证上述理论分析的正确性。
Aiming at high frequency resonance of microgrid with rectifier load,the Bode stability criterion based on admittance is used to carry out theoretical analysis and propose an active damping control strategy in which the inverter output current passes a proportional coefficient positive feedback to a current reference,the equivalent output impedance of the inverter can be effectively reduced and the stability margin of the system can be improved.Aiming at peak value of the resonance of rectified load admittance,a virtual resistance control scheme is proposed to restrain peak value of the resonance effectively and improve the stability of microgrid system with rectifier load.Finally,the PSCAD/EMTDCsimulation software is used to verify the correctness of the oretical analysis.
作者
孙孝峰
唐福顺
张浩翔
王宝诚
李昕
Sun Xiaofeng;Tang Fushun;Zhang Haoxiang;Wang Baocheng;Li Xin(Key Lab of Power Electronics for Energy Conservation and Motor Drive qf Hebei Province,School of Electrical Engineering,Yanshan University,Qinhuangdao 066004,China)
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2018年第8期2365-2372,共8页
Acta Energiae Solaris Sinica
基金
国家重点研发计划(2016YFB0900300)
国家自然科学基金(51677162
51407155)
河北省自然科学基金(E2017203337)
关键词
Bode稳定性判据
高频谐振
正反馈控制
虚拟电阻控制
Bode stability criterion
high frequency harmonic resonances
positive feedback control
virtual resistance control
