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Energy management by using point of common coupling frequency as an agent for islanded microgrids

机译:通过使用公共耦合频率点作为孤岛微电网的代理进行能源管理

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摘要

This study presents an islanded AC microgrid system composed of distributed generations (DGs) and an energy storage system. The valve-regulated lead acid battery bank is used as the energy storage device. A non-linear energy management control strategy is proposed by utilising the point of common coupling (PCC) frequency as an agent for all the constituent units, which avoids any communication lines among the constituent units. Based on the system modelling, the stability criterion for the proposed control strategy has been established. The proposed energy management is effective even when the battery is fully charged and DGs can supply more power than the load consumption. For this extreme situation, all DGs can automatically reduce their output power until the battery works in float charge state. The effectiveness of the proposed strategy is verified by simulation and experimental results.
机译:这项研究提出了一个由分布式发电系统(DG)和一个储能系统组成的孤岛式交流微电网系统。阀控式铅酸蓄电池组用作储能装置。提出了一种非线性能量管理控制策略,该方法利用公共耦合点(PCC)频率作为所有组成单元的代理,从而避免了组成单元之间的任何通信线路。在系统建模的基础上,建立了所提出控制策略的稳定性准则。即使电池充满电并且DG可以提供比负载消耗更多的功率,建议的能量管理还是有效的。在这种极端情况下,所有DG都可以自动降低其输出功率,直到电池处于浮充状态。仿真和实验结果验证了所提策略的有效性。

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