摘要
如何实现快速准确的并网同步是非理想电网电压情况下并网变换器安全高效运行的重要前提。针对电网电压不平衡、谐波和直流分量影响同步精度的问题,提出高阶解耦复数滤波并网同步方法,建立系统数学模型,进行系统稳定性分析和参数设计,并提出3种方案解决电压直流分量引起并网同步误差的问题,最后在TMS320F2812 DSP数字平台上对提出的方法进行实验研究,实验结果验证了提出方法的可行性和有效性。
Fast and accurate grid synchronization is of great importance for effectively operating the grid-connected converters under non-ideal grid voltages. In order to solve the problem of the negative effect of the unbalanced, distorted, dc-offset grid voltages on the accuracy of grid synchronization, a new high-order decoupled complex filter based solution is proposed in this paper. The mathematical model of the system is derived. The system stability analysis and parameter tuning procedure are discussed. Three solutions are presented to deal with the adverse effect of the dc component in voltages on the grid synchronization. Finally, the experimental tests are carried out on the TMS320F2812 DSP. The experimental results verify the effectiveness of the proposed method.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2015年第10期2576-2583,共8页
Proceedings of the CSEE
基金
国家自然科学基金项目(51307149
51407154)
河北省自然科学基金项目(E2014203237
E2015203283)~~
关键词
并网同步
非理想电网电压
并网变换器
正序分量
负序分量
grid synchronization
non-ideal grid voltage
grid-connected converter
.positive sequence component
negative sequence component
