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电力大数据:2019,22(6):-
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基于AGC的光伏电站一次调频控制
王小平, 王建锋, 郭鑫溢, 葛立青
(南京南瑞继保电气有限公司)
Primary frequency control of photovoltaic power station based on automatic generation control system
wangxiaoping, WANG Jianfeng, GUO Xinyi, GE Liqing
(Nanjing NARI-relays Electric Co ltd)
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投稿时间:2018-11-24    修订日期:2018-11-24
中文摘要: 逆变器调节速度快,且利用光伏电站的调频能力可降低常规调频备用容量,光伏电站深入参与电网一次调频将是一种很好的选择。基于此,本文在光伏电站自动发电控制(AGC)系统基础上增加光伏电站有功-频率下垂控制特性,使光伏电站在无需额外硬件增加或改造基础上实现AGC和一次调频功能一体化集成;其次,增加一次调频和AGC配合策略,实现二者无缝配合;最后,针对有功功率跟踪能力的不足对有功分配策略进行改进,提高了有功功率控制精度,提升了调频贡献能力。经过西北电网组织的新能源电站快速调频试验的验证,基于光伏电站自动发电控制系统的光伏电站一次调频控制具备较好的响应速度和调频贡献能力,能够为电网频率稳定提供支撑作用。
Abstract:The inverters have a fast regulation speed and the primary frequency regulation capacity of the photovoltaic power station can significantly reduce the conventional primary frequency regulation reserve capacity, so it will be a good choice for the photovoltaic power station to deeply participate in the primary frequency control of the power grid. In view of this, this article is to implement active power-frequency droop control characteristic of the photovoltaic power plant based on the automatic generation control (AGC) system. On this basis, the integration of AGC control and primary frequency control comes true without the need for hardware addition or modification. Secondly, the primary frequency control and AGC control matching strategy is added to achieve seamless cooperation between the two. Finally, the active power allocation strategy is improved in light of the shortage of active power tracking capability, which improves the accuracy of active power control and the contribution of frequency control. After the validation of the rapid frequency test of the Northwest Power Grid, the results show that primary frequency control of photovoltaic power station based on automatic generation control system has better performance in the response speed and frequency control contribution and shall provide support for power grid frequency stability.
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