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For quantum systems, vector potential plays a very important role [1] but, for classical macroscopic systems, it does not seem to play a very significant role. In this study, we demonstrate a vector-potential coil and a vector-potential transformer that each use a long flexible solenoid wound around a hollow cylinder. These devices generate a curl-free vector potential without magnetic field. In the...
This paper proposes an improved version of “On-demand Generation Regulation Control (OGRC)” system, which is observing the unstable generator outputs and watching all generators/batteries status including electric vehicles (EV) to realize on-demand regulation of unstable generators. In our previous version, unstable renewable generators, photovoltaic (PV) and wind turbine (WT) generators, were not...
This paper studies new techniques for critical trajectory method, a recent new method proposed by the authors for obtaining critical clearing time (CCT) for transient stability analysis. A specific feature of the proposed method lies in its ability to provide exact CCT without approximations since no such methods have existed so far. The method is based on the computation of the critical trajectory,...
This paper proposes a backward search approach to incorporate excess stream inflows, in stochastic dynamic programming (SDP) based reservoir scheduling, of hydropower plants. The aim is to reduce the amount of spill during operation of the reservoir. Energy maximization type stochastic dynamic programming (SDP) model, with inflow process assumption considered as independent, is developed for a hydropower...
This paper considers a penalty factor incorporated energy maximization type objective function, in order to reduce the amount of spill during the operation of the reservoir of a hydropower plant. Stochastic dynamic programming (SDP) model with independent inflow process assumption is developed for a hydropower plant located in Japan. SDP models can incorporate the inherent uncertainty associated with...
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