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This paper introduced a fault localization method in DC Marine power system using multiple injection at two different locations. The experimental test results which were derived from the DC Marine system demonstrator show that the fault can be detected and located quickly and accurately. Accompany with the circuit breaker and the Bus Interface Unit (BIU), the load supply can be uninterrupted during...
In order to solve problems of global warming and depletion of energy resources, renewable energy systems such as wind generation is getting attention. However, wind power fluctuates due to variation of wind speed, and it is difficult to wind power forecast perfectly. Therefore, wind power developers should follow the strict condition for output power smoothing when wind turbine generators (WTG) are...
ELIIY Power Co., Ltd. (ELP) [1] has commercialized a high safe large format lithium ion cell using LiFePO4 as the cathode material. The cell shows discharge capacity of 50Ah at room temperature, and has passed safety standard test “S-Mark” certification by TÜV Rheinland Japan. The cell's safety and electrochemical performance is suitable for the large format energy storage system, e.g., HEMS, BEMS.
The energy density of wave power is higher than some renewable energy sources such as wind and solar energy. However, because waves have an irregular reciprocating motion, it is difficult to convert wave power into electricity, and this has restricted the widespread use of wave power. In this paper, a new mechanism to convert wave power into electricity is proposed. It is referred to as a “direct-link”...
Photovoltaic (PV) systems are rapidly gaining acceptance as some of the best alternative energy sources. In installation area of large PV/battery system, it requires appropriate operation for example of a method considering power output fluctuation and insolation forecasts errors. In addition, it is better to minimize the size of battery and its capital cost. This paper proposes an optimization approach...
In this paper, the potentials, peculiarities and prospects of solar power generation system to the platform roofs of the railway station will be discussed. Based on the rough estimation, the total potential of our company for platform roof PV system is amount to be more than 100MW. While the railway premises have such a high potential for solar power introduction, they have also difficulties compared...
This paper presents a single phase inverter for the use of transformer-linked interleaved flyback converter. Compared with the core size of conventional type and proposed type flyback converter, the compact and light weight performance of the core are realizable. The power conversion system to propose comprises a flyback converter and a single phase inverter. Since the smoothing capacitor between...
Since nuclear power plants are shut down and working rate of thermal power plants are increasing, the buying electric rate is going to change in Japan. Although, selling electric rate of photovoltaic system (PV) is now 42 yen/kWh by feed-in tariff, the selling electric rate may drop after 10 years by the expired feed-in tariff. This paper concentrates on the optimum unit size of the PV and the solar...
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