Response of a grid forming wind farm to system events, and the impact of external and internal damping
Response of a grid forming wind farm to system events, and the impact of external and internal damping
复制标题
风电场电网对系统事件的响应以及外部和内部阻尼的影响
DOI：
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发表时间：
2020
影响因子：
2.6
通讯作者：
Juan Carlos Pérez Campion
中科院分区：
文献类型：
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作者：
A. Roscoe;Thyge Knueppel;Ricardo da Silva;P. Brogan;Isaac Gutierrez;D. Elliott;Juan Carlos Pérez Campion
继2017 - 2018年对应用于风力涡轮机的构网型变流器控制进行小规模研究之后，本研究描述了一项规模大得多的试验，涉及一个由苏格兰电力可再生能源公司拥有和运营的整个风电场。据作者所知，这是英国首个以构网模式运行的采用变流器连接的风电场，也是迄今为止世界上最大的此类风电场。这个拥有23台涡轮机、装机容量69兆瓦的风电场以构网模式运行了6周，探索了惯性常数H在0.2秒到8秒之间的情况。由于互联器、联合循环燃气轮机（CCGT）以及其他故障，发生了一些意外的频率扰动，未限功率的涡轮机能够对这些扰动做出响应。此外，还进行了几次有意的测试。涡轮机能够在相对较高的惯性水平下，对当前常见的频率事件提供稳定且恰当的响应。所捕捉到的响应引发了一场争论，即构网型变流器是否可能需要外部阻尼功率，或者内部阻尼是否足以在所有电网事件场景下与并联设备实现稳定且可靠的功率分配。本研究的分析表明，实际上内部阻尼可能是合适的，并且构网型变流器中外部阻尼功率的任何不足都可以通过电抗和/或下垂斜率响应时间管理得到极大缓解。
Following from smaller-scale investigations of grid-forming converter control applied to wind turbines in 2017–2018, this study describes a much larger trial involving an entire wind farm, owned and operated by ScottishPower Renewables. To the authors’ knowledge, this was the first UK converter-connected wind farm to operate in grid-forming mode, and the largest in the world to date. The 23-turbine, 69 MW farm ran in the grid-forming mode for 6 weeks, exploring inertia contributions between H = 0.2 s and H = 8 s. A number of unscheduled frequency disturbances occurred due to interconnector, combined cycle gas turbine (CCGT) and other trips, to which un-curtailed turbines were able to respond. In addition, several deliberate tests were carried out. The turbines were able to provide a stable and appropriate response at relatively high inertia levels to the frequency events commonly occurring today. The captured responses stimulated a debate as to whether external damping power might be required in a grid-forming converter, or whether internal damping is sufficient to allow stable and robust power-sharing with parallel devices in all grid event scenarios. Analysis in this study suggests that, practically, internal damping is probably appropriate, and that any deficiency in external damping power can be more than mitigated by reactance and/or droop-slope response-time management in the grid-forming converters.