Variable speed pumped storage hydropower for integration of wind energy in isolated grids : case description and control strategies
Variable speed pumped storage hydropower for integration of wind energy in isolated grids : case description and control strategies
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发表时间：
2008
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通讯作者：
J. Suul;K. Uhlen;T. Undeland
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作者：
J. Suul;K. Uhlen;T. Undeland
本文介绍了变速抽水蓄能水电站用于平衡孤立电网中风力发电的功率波动。提出了一种基于同步电机和全尺寸背靠背电压源换流器的拓扑结构，以实现水泵水轮机组的变速运行。这种拓扑结构以前没有研究过变速抽水蓄能电站，但现在可以认为是相关的小型和中型抽水蓄能机组，因为电压源换流器驱动器的发展，更高的电压水平。基于法罗群岛的情况描述了实施这种系统的可能情况，在法罗群岛，可控的能量存储可以帮助允许在电力系统中使用更高比例的可再生能源，并减少对化石燃料的依赖。通过负载跟踪对抽水蓄能机组进行功率控制，以直接补偿风电场输出功率的波动，将限制对电网其余部分运行的影响。利用抽水蓄能参与电力系统的一次调频，还可以改善系统对其它生产或负荷变化的频率响应。
this paper presents the use of variable speed pumped storage hydropower plants for balancing power fluctuations from wind power in an isolated grid. A topology based on a synchronous machine and a full scale back-to-back voltage source converter is suggested for obtaining variable speed operation of a pump-turbine unit. This topology has not been previously investigated for variable speed pumped storage power plants, but can now be considered relevant for small and medium sized pumped storage units because of the development of voltage source converter drives for higher voltage levels. A possible case for implementation of such a system is described based on the situation on the Faroe Islands, where controllable energy storage can help to allow for a higher share of renewable energy in the power system and by that to reduce the dependency on fossil fuels. Power control of the pumped storage unit by load following for direct compensation of the fluctuations in power output from a wind farm will limit the influence on the operation of the rest of the grid. By utilizing the pumped storage to take part in the primary frequency control of the power system, the frequency response to other changes in production or load will also be improved.