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首页> 外文期刊>Renewable Power Generation, IET >Enhanced utility-scale photovoltaic units with frequency support functions and dynamic grid support for transmission systems
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Enhanced utility-scale photovoltaic units with frequency support functions and dynamic grid support for transmission systems

机译：具有传输系统的频率支持功能和动态电网支持的增强型公用事业规模光伏装置

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摘要

This research presents a model of a utility-scale photovoltaic unit (USPVU) enhanced with an embedded hybrid energy storage system (HESS), suitable for stability studies in transmission systems. The main goal of this model is the simultaneous provision of primary frequency control and dynamic grid support. The primary frequency control includes both droop response (achieved by the frequency sensitive mode [FSM] operation) and inertial response (IR). To obtain these grid support functions, the research designed a suitable voltage and frequency (V-f) control, which coordinates the photovoltaic (PV) maximum power point tracking control, HESS converter control, and PV inverter control. Firstly, a midterm assessment of energy requirements in the sized HESS, based on frequency data, validated the energy availability of the enhanced USPVU for primary frequency control, according to new prequalification rules for energy-constrained units. Then, transient stability assessments were performed on a representative transmission system to check the performance of the added FSM and IR in USPVUs with dynamic grid support. The results of the frequency phenomena in the IEEE 39-bus system showed that the enhanced USPVU shared primary frequency control responsibilities with the conventional generation. This was achieved with two criteria to dispatch and commit conventional units by USPVUs.
机译：这项研究提出了一种具有嵌入式混合式能量存储系统（HESS）的增强型公用事业规模光伏装置（USPVU）的模型，适用于输电系统的稳定性研究。该模型的主要目标是同时提供主频率控制和动态电网支持。主频率控制包括下垂响应（通过频率敏感模式[FSM]操作实现）和惯性响应（IR）。为了获得这些电网支持功能，研究设计了一种合适的电压和频率（V-f）控制，该控制可协调光伏（PV）最大功率点跟踪控制，HESS转换器控制和PV逆变器控制。首先，根据能量限制单元的新资格预审规则，基于频率数据的中期HESS能源需求评估，基于频率数据，验证了用于主频率控制的增强型USPVU的能量可用性。然后，在具有代表性的输电系统上进行了暂态稳定性评估，以检查带有动态电网支持的USPVU中添加的FSM和IR的性能。 IEEE 39总线系统中频率现象的结果表明，增强型USPVU与常规一代共享主要的频率控制职责。这是通过USPVU派遣和交付常规单位的两个标准实现的。

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