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Development of distributed power systems with photovoltaic (PV) panels and storage batteries has become very active. Since the generated power by PV panel is unstable, development of an intelligent and efficient charging system is strongly demanded. Also, the distributed systems are optimized by co-operating by each node. Thus, inexpensive and quickly responding PV emulation system is effective to...
This paper discusses an SOC estimation system for lithium ion batteries based on the extended Kalman filter. The accuracy of the estimation is strongly dependent on accuracy of the battery model. We have newly formulated the equivalent circuit model that covers temperature and SOC dependencies. As the result, the error rate of the estimation has been improved significantly. The experimental results...
This paper proposes a fast and accurate parallel transient simulator for power grid by Backward Euler method using GPU (Graphics Processing Unit). A new data structure CSG (Compressed Sparse for Grid structure) is proposed for the computational efficiency. The analysis flow is implemented by Jacobi relaxation with CSG. As the result, we have implemented a simulator whose speed is 74.0 times faster...
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