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A Multi-rate Co-simulation of Combined Phasor-Domain and Time-Domain Models for Large-scale Wind Farms
IEEE Transactions on Energy Conversion ( IF 4.9 ) Pub Date : 2020-03-01 , DOI: 10.1109/tec.2019.2936574 Yupeng Li , Dewu Shu , Fan Shi , Zheng Yan , Yiying Zhu , Nengling Tai
IEEE Transactions on Energy Conversion ( IF 4.9 ) Pub Date : 2020-03-01 , DOI: 10.1109/tec.2019.2936574 Yupeng Li , Dewu Shu , Fan Shi , Zheng Yan , Yiying Zhu , Nengling Tai
In the year 2015-2018, there are many sub- and super-synchronous interaction (S$^2$SI) events, happened in China. However, traditional transient stability models, electro-magnetic transient (EMT) models and hybrid TS and EMT simulation methods fail to capture the desired wide frequency band interactions between large-scale AC grids and wind farms. To accurately and efficiently capture wide frequency band interactions between AC grids and wind farms, a simulation method which can extend the time-step to 500 $\mu$s and further adopt the multi-rate structure is highly required. For this objective, we propose a multi-rate co-simulation method, in which the target system is partitioned into electro-magnetic transient (EMT) and shifted frequency phasor (SFP) subsystems, represented by our proposed transformation based SFP models and the traditional EMT models, respectively. The simulation efficiency of simulating large-scale AC grids is significantly improved by adopting a much larger time-step. Further, the multi-rate multi-domain transmission-line model (MD-TLM) and the multi-rate frequency dependent MD-TLM are respectively proposed to reflect wide-band interactions between AC grids and wind farms. Eventually, the multi-rate co-simulation is implemented based on the efficient SFP models, network partitioning, and so-called the multi-rate (FD)-MD-TLM. The performance (efficiency and accuracy) of the proposed method has been fully validated on a practical system integrating large AC grids and wind farms.
更新日期：2020-03-01
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