Impact of dynamic behavior of photovoltaic power generation systems on short-term voltage stability
Impact of dynamic behavior of photovoltaic power generation systems on short-term voltage stability
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DOI：
10.1109/pesgm.2016.7741134
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发表时间：
2016-07
期刊：
影响因子：
--
通讯作者：
K. Kawabe;Kazuyuki Tanaka
中科院分区：
文献类型：
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作者：
K. Kawabe;Kazuyuki Tanaka
在这项研究中，我们调查的动态行为的光伏（PV）发电系统对输电系统的短期电压稳定性的影响。首先，通过设置几个恢复速度的有功电流输出时，光伏系统的操作被中断，因为电压暂降的PV模型的故障穿越能力的影响进行了研究。通过使用瞬态P-V曲线和稳定性边界，这已经在我们以前的研究中提出的结果进行了分析。此外，我们发现，安装的PV严重损害了短期电压稳定，如果PV关闭后的电压骤降，其恢复速度慢。接下来，测试了控制短期电压不稳定现象的两种对策。一种是光伏系统在正常状态下以超前功率因数运行，另一种是光伏系统逆变器在电压暂降后的动态无功功率控制。对一个单负荷无穷大系统和一个五机五负荷系统进行了算例分析。结果表明，这些措施可以起到实质性的作用，防止光伏系统突然中断时，因为故障而引起的电压失稳现象。
In this study, we investigate the impact of the dynamic behavior of photovoltaic (PV) power generation systems on short-term voltage stability of the transmission system. First, the impact of the fault ride-through capability of a PV model is studied by setting several recovery speeds of the active current output when the operation of the PV system is interrupted because of a voltage sag. The results are analyzed by using transient P-V curves and a stability boundary, which has been proposed in our previous research. Further, we show that the installation of PVs severely impairs the short-term voltage stability if the PVs shut off after a voltage sag, and its recovery speed is low. Next, two countermeasures to control short-term voltage instability phenomena are tested. One is the operation of the PV system at a leading power factor in the normal state, and the other is the dynamic reactive power control by the inverters of the PV system after a voltage sag. Numerical examples are carried out for a one-load infinite-bus power system and a five-machine five-load power system. The results show that these countermeasures can play a substantial role in preventing the voltage instability phenomena caused when a PV system is suddenly interrupted because of a fault.