| Budget Amount *help |
¥2,400,000 (Direct Cost: ¥2,400,000)
Fiscal Year 2001: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2000: ¥1,500,000 (Direct Cost: ¥1,500,000)
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| Research Abstract |
This project is for constructing voltage control scheme for electric power systems. New methodologies for control as well as operation are studied especially for distribution and sub-transmission networks to be constructed in the next generation. The results are summarized as follows.
The existing type of tap changing voltage controllers, which are numerously distributed in the system, work independently by means of very simple control laws. Advantageous features of the present control method lies in simple architecture, fault tolerant, reliable, high maintainability, and flexibility for system extension, while the disadvantage is that the control performance is limited from the point of view of voltage regulation as well as unnecessary number of tap actions. In this project, a decentralized autonomous voltage control method is developed in order to resolve the problems of the present control method while keeping the advantages, where data communications are carried out among the controllers to improve the control performance.
Next, several techniques are developed for robust control design for FACTS controllers which are being introduced more and more in the system. Static Var Compensator (SVC) as well as Static Var Generator (SVG, or STATCON) are the main target for the FACTS devices to improve the stability and robustness.
Furthermore, an allocation problem for the FACTS devices is studied to realize the system security, where contingencies are directly taken into account. Most effective allocations are investigated from the point of view of the total cost for investment, system operation, faults, etc.
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