Gu Herong, Guan Yajuan, Wang Huaibao, Wei Baoze, Guo Xiaoqiang
Key Lab of Power Electronics for Energy Conservation and Motor Drive of Hebei Province, Yanshan University, Qinhuangdao 066004, China.
ScientificWorldJournal. 2014 Feb 4;2014:263590. doi: 10.1155/2014/263590. eCollection 2014.
Microgrid is an effective way to integrate the distributed energy resources into the utility networks. One of the most important issues is the power flow control of grid-connected voltage-source inverter in microgrid. In this paper, the small-signal model of the power flow control for the grid-connected inverter is established, from which it can be observed that the conventional power flow control may suffer from the poor damping and slow transient response. While the new power flow control can mitigate these problems without affecting the steady-state power flow regulation. Results of continuous-domain simulations in MATLAB and digital control experiments based on a 32-bit fixed-point TMS320F2812 DSP are in good agreement, which verify the small signal model analysis and effectiveness of the proposed method.
微电网是将分布式能源资源整合到公用事业网络中的有效方式。最重要的问题之一是微电网中并网电压源逆变器的潮流控制。本文建立了并网逆变器潮流控制的小信号模型，从中可以看出传统的潮流控制可能存在阻尼不足和暂态响应缓慢的问题。而新的潮流控制可以在不影响稳态潮流调节的情况下缓解这些问题。基于MATLAB的连续域仿真结果和基于32位定点TMS320F2812 DSP的数字控制实验结果吻合良好，验证了所提方法的小信号模型分析及有效性。
