Grid frequency and voltage support using PV systems with energy storage
Grid frequency and voltage support using PV systems with energy storage
复制标题
使用具有储能功能的光伏系统支持电网频率和电压
DOI：
10.1109/naps.2011.6025112
复制
发表时间：
2011
期刊：
影响因子：
--
通讯作者：
B. Chowdhury
中科院分区：
文献类型：
--
作者：
Ravi Bhatt;B. Chowdhury
提出了一种基于社区的光伏发电系统的优化运行方案。该系统可以参与电网辅助服务，如基于智能电网框架的频率和电压调节功能。该模型包括一个光伏电站与锂离子电池耦合到电网的帮助下，一个三相逆变器。假设光伏电站和电网之间的双向通信。光伏/储能电站不断更新其当前的kW/kVar容量，电网传输特定电量和特定时间长度的需求。电池充电能量可以来自PV系统或电网，这取决于当时的能源价格。当满足两个条件时，电池放电：电网要求来自基于社区的光伏系统的能量，以及光伏系统本身无法满足所要求的kW或kVar需求。光伏发电厂和电池存储与电网集成的DC-DC和DC-AC转换器的帮助下，这样的方式，可以实现双向流动的有功功率和无功功率。集成能源的控制器响应接收到的信号并尝试满足电网需求。系统响应几乎是瞬时的，因此在频率和电压调节方面非常有帮助。
An optimized operating scheme for a utility connected community based photovoltaic (PV) system is described. The system can participate in grid ancillary services like frequency and voltage regulation functions based on the Smart Grid framework. The proposed model comprises of a PV plant with Li-ion batteries coupled to the grid with the help of a three phase inverter. A two-way communication between the PV plant and the grid is assumed. The PV/storage plant provides constant updates on its current kW/kVar capability and the grid transmits the demand for specific amounts of power and for specific lengths of time. The battery charging energy can originate from either the PV system or the grid depending on the prevailing energy prices. The batteries are discharged when two conditions are met: the grid requests energy from the community-based PV system and if the PV system itself fails to meet the requested kW or kVar demand. The PV plant and the battery storage are integrated with the grid with the help of dc-dc and dc-ac converters in such a way that bi-directional flow of active and reactive powers can be achieved. Controllers integrating energy sources respond to the received signals and attempt to fulfill the grid demand. The system response is almost instantaneous and thus can be very helpful in frequency and voltage regulation.