摘要
微网中各类本地负荷靠近微源接入微网使得该微源输出电压易受本地负荷影响。而随着微网的发展,大量单相负荷及三相不对称负荷的接入会造成微源输出电压不对称,影响微网电能质量。在相同的硬件条件和控制参数下对PQ控制、V/f控制、滑模变结构控制3种控制策略搭建了各系统模型,调整参数使系统能在各控制策略下达到最优控制效果。最后通过PSCAD/EMTDC软件仿真结果分析了3种控制方式在相同不平衡负荷情况下运行的抗不平衡度能力。
The output voltage of micro - source is easily affected by local load caused by all kinds of local load in micro - grid closing to micro - source when connecting with the micro - grid. With the development of micro - grid, the integration of a large number of single - phase and three - phase unbalanced load may cause the output voltage of micro - source asymmetry, which may affect the power quality of micro - grid. Under the same conditions and control parameters, the system models for PQ control, V/f control and sliding - mode variable structure control are built, which allows the system to adjust the parame- ters to achieve the optimal control results in each control strategy. Finally according to the PSCAD/EMTDC software simulation results, the anti -unbalance ability in three control methods under the same unbalanced load is analyzed.
出处
《四川电力技术》
2015年第1期65-70,共6页
Sichuan Electric Power Technology
关键词
微源
控制策略
不平衡负荷
滑模变结构
micro - source
control strategy
unbalanced load
sliding - mode various structure control （SMVSC）
