A New Nonlinear Control Strategy for Three-Phase Photovoltaic Grid-Connected Inverter
Photovoltaic (PV) grid-connected system requires the inverter possesses excellent dynamic and static characteristics. In view of the mathematical model of the inverter is nonlinear, we will adopt a kind of nonlinear control strategy called Passivity-Based Control (PBC) based on current model. First we establish the standard Euler -Lagrange (EL) current mode for inverter, then we also prove that this inverter is strictly passive. Based on passivity of inverter, we can redistribute the system energy, and adopt the approaches of injecting damping and decoupling to improve system performance. In this paper, we can make the power factor of inverter achieve one, and current of inverter output can fast track the grid voltage, we can also make the active power of system fast track the PV array maximum power point Usually, we can use Single Chip Microcomputer or other kinds of computer with this algorithm for our design, this algorithm can be programmed with the computer language, such as C/C++ and assembly language, etc. Simulation results show that passivity-based control based on current model method can make the inverter possess better robustness and dynamic.
PV Grid-Connected Passivity-Based Control Current model Inverter Microcomputer Computer Language
Kun Mu Xiaoyu Ma Xiaobin Mu Dalei Zhu
Department of Computer Science and Engineering, Henan Institute of Engineering, Zhengzhou, China School of Automation, Beijing Information Science and Technology University, Beijing, China School of Computer Science and Technology, Henan Polytechnic University, Jiaozuo, China
国际会议
哈尔滨
英文
4611-4614
2011-08-12（万方平台首次上网日期，不代表论文的发表时间）