2007 Fiscal Year Final Research Report Summary
GENERATOR CONTROL BY EQUILIBRIUM POINTANALYSIS OF ELECTRIC POWER SYSTEMAND ITS APPLICATION
| Project/Area Number |
17560263
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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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 Prefecture University |
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Principal Investigator |
KAWAMOTO Shunji Osaka Prefecture University, GRADUATE SCHOOL OF ENGNEERING, PROFESSOR (60214706)
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| Project Period (FY) |
2005 – 2007
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| Keywords | ELECTRIC POWER SYSTEM / AVR / PSS / GENERATOR CONTROL / LIMITER / EQUILIBRIUM POINT / NONLINEAR CONTROL / DYNAMIC LOAD |
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| Research Abstract |
1. The Japanese standard one-machine infinite-bus system model is formulated by the twelfth dimensional simultaneous nonlinear differential equations, and the equilibrium points are analyzed. Then, a complementary control input for AVR with a limiter of the model system is determined on the basis of the analysis. As the result, it is shown that the unstable equilibrium point is eliminated by adding the proposed input, and the critical clearing time and the available transfer capability can be improved in comparison with PSS of the standard model.
2. For the study of voltage stability, a general method is to analyze the system and load P-V curves. From the P-V curves, the system operation point can be obtained as the intersection of the curves. Therefore, the location of the operation point gives a voltage stability of the power system. Then, a novel dynamic load modeling is proposed, and by considering the dynamic load in the standard one-machine system model, the system and the load P-V and Q-V curves are constructed. Consequently, it is shown that the voltage stability can be analyzed by the P-V and the Q-V curves considering the dynamic load of the system model.
3. A bulk power system can be aggregated exactly into a decentralized system by looking over the entire system at a generator-bus. Then, the Japanese standard one-machine system model with dynamic load is introduced, and two cases of the voltage dip and rise at a load-bus are treated by calculating analytically and numerically the nonlinear swing equation. Then, it is concluded that a one-machine one-load decentralized power system can be constructed exactly at each generator-bus of bulk power system, and the available transfer capability under the load-bus voltage dip and rise can be enhanced by applying the proposed nonlinear controller.
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Research Products
(67 results)
