 Coordination between Slow and Fast Controllers
Because of the deregulation in power industry and the recent trend of renewable energy diffusion, the number of installed distributed generators are getting larger in distribution networks. In this kind of situations, in particular when wind turbines are installed, reverse power flow leads undesirable voltage upswings and transient fluctuations. These types of voltage fluctuations cannot be compensated by conventional SVRs due to their slow responses, and other fast controllers like SVCs and AVRs are expected to be promising candidates to cover the lack of controllability. However, the fast ones excessively compensate the slow fluctuations that should be originally controlled by the conventional SVRs and the coordination between them is very difficult.
In this study, when distributed generators are mass introduced to a distribution network, an efficient method is proposed to coordinate slow and fast controllers. This achieves a flexible control that allows the fast ones to compensate the transient voltage fluctuations only and the slow ones to respond to the slow fluctuations.
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![Researches [Coordination] (ACSOL)(J)](../images/ACSOL_ChLang_Japanese_Base.gif){kind=small}
