Scarcity of fossil fuel resources has motivated the researchers to develop renewable energy based power projects. Instead of using a single or independent renewable energy source, it is preferable to use the combinati...Scarcity of fossil fuel resources has motivated the researchers to develop renewable energy based power projects. Instead of using a single or independent renewable energy source, it is preferable to use the combination of such energy sources in a distributed way to compensate the power fluctuations of the system and this leads to the concept of hybrid micro-grid energy. Voltage stability is an important parameter for the secure operation of the hybrid-micro grid, and IEEE 1547 Standard defines the limit of the voltage for the successful operation of the micro-grid. Although Vanadium Redox Batteries (VRBs) can help the system to stabilize the voltage when voltage sag occurs when a heavy load is suddenly connected to the system, this stabilization process takes some time. This paper discusses the application of super capacitors to the hybrid micro-grid system, as a higher energy density element, to help the system quickly recover its transient voltage.展开更多
现阶段,混合微网一般通过双向功率变换器(bidirectional AC/DC power converter,BPC)连接来实现能量交互。在孤岛模式下,双向功率变换器作为平衡器来保障子网供电质量。针对孤岛模式下混合微网的功率分配问题,提出一种基于下垂的双向功...现阶段,混合微网一般通过双向功率变换器(bidirectional AC/DC power converter,BPC)连接来实现能量交互。在孤岛模式下,双向功率变换器作为平衡器来保障子网供电质量。针对孤岛模式下混合微网的功率分配问题,提出一种基于下垂的双向功率变换器改进控制策略。该策略可根据子网容量成比例调配交直流子网间的功率流动。为了提高直流微网的动态响应效果,采用直流电压的平方代替直流电压作为参考值,使控制更具线性化。将上述控制策略在MATLAB\Simulink平台上进行建模仿真,结果验证了该方法的可行性。展开更多
文摘Scarcity of fossil fuel resources has motivated the researchers to develop renewable energy based power projects. Instead of using a single or independent renewable energy source, it is preferable to use the combination of such energy sources in a distributed way to compensate the power fluctuations of the system and this leads to the concept of hybrid micro-grid energy. Voltage stability is an important parameter for the secure operation of the hybrid-micro grid, and IEEE 1547 Standard defines the limit of the voltage for the successful operation of the micro-grid. Although Vanadium Redox Batteries (VRBs) can help the system to stabilize the voltage when voltage sag occurs when a heavy load is suddenly connected to the system, this stabilization process takes some time. This paper discusses the application of super capacitors to the hybrid micro-grid system, as a higher energy density element, to help the system quickly recover its transient voltage.
文摘现阶段,混合微网一般通过双向功率变换器(bidirectional AC/DC power converter,BPC)连接来实现能量交互。在孤岛模式下,双向功率变换器作为平衡器来保障子网供电质量。针对孤岛模式下混合微网的功率分配问题,提出一种基于下垂的双向功率变换器改进控制策略。该策略可根据子网容量成比例调配交直流子网间的功率流动。为了提高直流微网的动态响应效果,采用直流电压的平方代替直流电压作为参考值,使控制更具线性化。将上述控制策略在MATLAB\Simulink平台上进行建模仿真,结果验证了该方法的可行性。
