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Analysis of operation characteristics of adjustable-speed pumped storage hydropower unit with AC excitation

机译：交流励磁调速抽水蓄能机组运行特性分析

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摘要

The safe and stable operation of the continuing developed power grid can be guaranteed depending largely on the adjustable speed pumped storage hydropower unit (AS-PSH) for its highly efficient peak-frequency modulation ability. In this paper, the design and control strategies of the AS-PSH with AC excitation are proposed. For the evaluation of flexibility and storage capacity, the operation characteristics of the AS-PSH unit are determined through establishing corresponding mathematical models and RTDS simulation tests. The stable operation range and the response speed characteristics of AS-PSH in term of active/reactive power regulation under different working conditions are studied. Results show that the AS-PSH with AC excitation possesses great leading phase capacity and the established de-coupling control system using both AC excitation and governor achieves high response speed. The present study could provide a reliable control basis for the realization of the smooth integration of the intermittent renewable energy sources into the grid.
机译：可以持续保证不断发展的电网的安全和稳定运行，很大程度上取决于可调速抽水蓄能水电机组（AS-PSH）的高效峰值频率调制能力。提出了带有交流激励的AS-PSH的设计和控制策略。为了评估灵活性和存储容量，通过建立相应的数学模型和RTDS模拟测试来确定AS-PSH单元的操作特性。研究了AS-PSH在不同工作条件下的稳定工作范围和有功/无功调节的响应速度特性。结果表明，采用交流励磁的AS-PSH具有超前的相位容量，建立的同时采用交流励磁和调速器的解耦控制系统具有较高的响应速度。本研究可为实现间歇性可再生能源向电网的平稳整合提供可靠的控制基础。

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