Abstract：The ideal proportional complex integral (PCI) controller can generate an infinite gain at the resonant frequency but no gains at other frequencies, which can eliminate the steady-state error completely. However, the infinite amplitude may cause stability problems. In this paper, a quasi-proportional complex integral (QPCI) controller is presented for eliminating the steady-state error in the stationary frame. The QPCI controller uses the cross-axis to produce resonance with each other, which achieves the tracking of sine signals. Meanwhile, introducing the frequency bandwidth ωc can both eliminate the steady state error and ensure the system stability. In order to deeply understand the principle operation of the controller and the impacts of parameters, this paper structures a physical circuit model. The theoretical analysis, simulations and experiments are carried out to compare the performance of the PCI, quasi PCI and the traditional quasi PR with three-phase grid connected inverter.
张纯江, 郭忠南, 骈帅华, 王晓寰. 逆变器系统中准PCI控制器及其物理模型分析[J]. 电工技术学报, 2017, 32(24): 115-125.
Zhang Chunjiang, Guo Zhongnan, Pian Shuaihua, Wang Xiaohuan. Analysis of Quasi-Proportional Complex Integral Controller and Its Physical Model in Inverter System. Transactions of China Electrotechnical Society, 2017, 32(24): 115-125.
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2017, Vol. 32 
