Control of Photovoltaic Systems for Enhanced Short-Term Voltage Stability and Recovery

Control of Photovoltaic Systems for Enhanced Short-Term Voltage Stability and Recovery
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DOI：
10.1109/tec.2018.2875303
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发表时间：
2019-03
期刊：
IEEE Transactions on Energy Conversion
影响因子：
4.9
通讯作者：
G. Lammert;D. Premm;Luis David Pabón Ospina;J. Boemer;M. Braun;T. Van Cutsem
G. Lammert;D. Premm;Luis David Pabón Ospina;J. Boemer;M. Braun;T. Van Cutsem
中科院分区：
工程技术1区
文献类型：
--
作者：
G. Lammert;D. Premm;Luis David Pabón Ospina;J. Boemer;M. Braun;T. Van Cutsem

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本文研究了以下方面的影响： 1) 低电压穿越 (LVRT) 和动态电压支持 (DVS) 能力； 2）有功电流恢复率； 3）本地电压控制； 4）大型光伏（PV）系统的厂级电压控制，包括短期（ST）电压稳定性和故障引起的延迟电压恢复（FIDVR）。此外，还简要研究了其对瞬态和频率稳定性的影响。为了评估 FIDVR，定义了一种新颖的指标，即所谓的电压恢复指数 (VRI)。这些研究是在 IEEE 电压稳定性测试系统（即 Nordic 测试系统）上使用 WECC 通用光伏系统模型进行的。结果表明，在没有 LVRT 能力的情况下，系统出现 ST 电压和瞬态不稳定。只有 LVRT 和 DVS 功能有助于避免 ST 电压和瞬态不稳定。考虑到电压和频率动态，100%/s的有功电流恢复率显示出最佳性能。为了进一步增强电压动态，应应用厂级电压控制和本地协调无功功率/电压控制。此外，VRI 还提供有关 FIDVR 的有用信息，并有助于比较不同的 ST 电压控制。
This paper investigates the impact of: 1) the Low Voltage Ride-Through (LVRT) and Dynamic Voltage Support (DVS) capability; 2) the active current recovery rate; 3) the local voltage control; and 4) the plant-level voltage control of large-scale PhotoVoltaic (PV) systems on Short-Term (ST) voltage stability and Fault-Induced Delayed Voltage Recovery (FIDVR). Moreover, the influence on transient and frequency stability is studied briefly. To evaluate FIDVR, a novel metric, the so-called Voltage Recovery Index (VRI), is defined. The studies are performed with the WECC generic PV system model on an IEEE voltage stability test system, namely the Nordic test system. The results show that without LVRT capability the system is ST voltage and transient unstable. Only the LVRT and DVS capability help to avoid ST voltage and transient instability. Considering voltage and frequency dynamics, an active current recovery rate of 100%/s shows the best performance. To further enhance voltage dynamics, plant-level voltage control together with local coordinated reactive power/voltage control should be applied. Moreover, the VRI provides useful information about the FIDVR and helps to compare different ST voltage controls.