ローカル潮流情報に基づくTCSC制御

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  • TCSC Control Based on Local Power Flow Information
  • ローカル チョウリュウ ジョウホウ ニ モトズク TCSC セイギョ

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This paper describes an optimal TCSC (Thyristor Controlled Series Capacitor) control method which can be applied to local lines to suppress power flow deviations based on local information obtained at each bus. The background of TCSC, which is a typical equipment of FACTS, is requirement of increasing the transmissible power flow. To suppress system deviations for the system stabilization and for the effective use of existing equipment without new investments, the control methods of TCSC have been studied. However, the practical control method should have some conditions, which are the clock synchronization between collecting and using information for the control, and probability of the application for multi-machine systems.<br> The proposed method is based on the fact that the location of the contingencies can be estimated from only power flow deviations at local buses which are measured after the disturbance occurs. Because the power system has many variables, it is necessary to find the control method which decides optimal control of each TCSC. To solve this problem easily, optimal regulator theory is used. And a DC power flow calculation and a generalized inverse matrix are also used to make relation between the state variables and the power flow deviations.<br> The simulations with 4-machine 11-bus and 9-macnie 38-bus power system models show the effectiveness. The proposed method adequately controls the amounts of TCSC which are very close to those of centralized one. And it reflects small frequency deviations compared with that of uncontrolled method. The improved transient performance of frequency deviations are shown in the simulation tests.

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