1994 Fiscal Year Final Research Report Summary
Study on photovoltaic power system using orthogonal-core type dc-ac converter
| Project/Area Number |
05555080
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| Research Category |
Grant-in-Aid for Developmental Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
電力工学・電気機器工学
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| Research Institution | Tohoku University |
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Principal Investigator |
ICHINOKURA Osamu Tohoku Univ., Electrical Engng., Associate Professor, 工学部, 助教授 (20134017)
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| Co-Investigator(Kenkyū-buntansha) |
JINZENJI Toshimasa Tohoku Univ., Electrical Engng., Professor, 工学部, 教授 (10216260)
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| Project Period (FY) |
1993 – 1994
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| Keywords | Photovoltaic power system / DC-AC converter / Orthogonal-core / Nonlinear magnetics |
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| Research Abstract |
The purpose of this research is development of the orthogonal-core type dc-ac converter, which is proposed by the author, applicable to practical photovoltaic power system. The results obtained by the study in the time of two years are as follows :
1.Development of solar cell simulator : The simulator is constructed with a variable dc-power-supply and diode array. The I-V curves of the trial simulator for the various solar radiation show good agreement with the actual solar cell array.
2.Considerations on basic operation of orthogonal-core type dc-ac converter : Using the orthogonal-core type dc-ac converter with small capacity of 400 W,the authors clarify the basic operation of the converter. The simulated and experimental results indicate that the converter has some desirable features for a residential photovoltaic power system.
3.Optimum design of the dc-ac converter : The authors present a method for optimum design of the converter. In particular, the authors propose a new analysis method based on a three-dimensional magnetic circuit model of the orthogonal-core. The results are useful for improvement of the dc-ac converter.
4.Development of actual dc-ac converter : Based on the above results, the authors made a 3 kW orthogonal-core type dc-ac converter. The efficiency of the trial converter is 90 %. The converter can receive practical application.
5.Development of a new applications : In this research, the authors considered new applications of the orthogonal-core. One application is a new variable inductor with sinusoidal output and high speed operation using the orthogonal-core. The variable inductor is useful for a VAR compensator with high performances.
The orthogonal-core type dc-ac converter presented here is useful for residential photovoltaic power system because of the converter has desirable features which include simple construction, easiness of maintenance and excellent fault tolerance.
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