1997 Fiscal Year Final Research Report Summary
Active Control of Power Systems by Using Solid State Phase Shifters with Energy Storage Function
| Project/Area Number |
07455120
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
電力工学・電気機器工学
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| Research Institution | Osaka University |
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Principal Investigator |
TSUJI Kiichiro Osaka Univ., Faculty of Engineering, Professor, 工学部, 教授 (30029342)
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| Co-Investigator(Kenkyū-buntansha) |
ISE Yoshifumi Osaka Univ., Faculty of Engineering, Associate Professor, 工学部, 助教授 (00184581)
MITANI Yasunori Osaka Univ., Faculty of Engineering, Associate Professor, 工学部, 助教授 (10192759)
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| Project Period (FY) |
1995 – 1997
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| Keywords | power system control / superconducting magnetic energy storage (SMES) / solid state phase shifter / power system stabilizing control / FACTS / power quality control / unbalanced load compensation / harmonics compensation |
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| Research Abstract |
Control of power systems using solid state phase shifters with energy storage function has been studied for three years from 1995 to 1997. The proposed apparatus has been named SuperSMES,which is associated with its high performances superior to SMES (Superconducting Magnetic Energy Storage). Obtained results are summarized as below.
1. Prototype system composed of a 10kJoule superconducting magnet and power converters has been built and tested. Operations from starting up, power system stabilization after a fault in the power system, and recovering stored energy of the superconducting coil have been successfully carried out in a model transmission line.
2. The circuit equivalent of SuperSMES has been modeled as two independent current sources. A control scheme for the power system stabilization has been derived from the model. The effect of control has been verified by digital simulation.
3. A control scheme based on d-q transformation referred to the rotating frame in phase with generator terminal voltage has been developed. The validity has been verified by digital simulation and experiment. A control scheme for the two machine power system has been developed and tested by sigital simulation.
4. The developed controller has been modified by estimating the required signals from the local information. In addtion, a robust and effective control scheme has been derived by applying the technique to linearize the generator power swing property.
5. Simultaneous compensation of harmonic and negative sequence voltage/current with the proposed SuperSMES is possible. Especially, compensation of negative sequence voltage/current is easy due to the stored energy in the superconducting magnet.
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