SUMMARYAn adjustable-speed flywheel generator (FWG) can control both active power and reactive power rapidly. We have studied the effect of FWG installation on a largecapacity, long-distance transmission system, especially when the system includes loops. In this paper, we describe the selection of FWG location, the selection of stabilizing control input signal, and the required quantities of FWG. FWG location is selected by a PQ-sensitivity method, calculation of which is simple and permits easy understanding of the effect of both FWGs active and reactive power. As a stabilizing control input signal, we use bus voltage frequency instead of power flow because the flow changes stepwise by opening three-phase single-circuit. Additionally, we clarify the FWG quantities that must be designed, such as FWGs active power and reactive power. We considered FWGs slip to determine the quantity because the capacity of the exciter depends on slip. © 1999 Scripta Technica, Electr Eng Jpn, 127(2): 3241, 1999

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The PSS is a reasonable controller to stabilize the intertie and local oscillations of power networks. PSSs are usually set with the one-machine infinite-bus system model. The coordinated setting of the multiple PSSs considering the characteristics of the network is expected to improve stability. For this purpose, the Modal Performance Measure method is used to adjust the PSS parameters. The model is identified by the N4SID identification method. In this paper, the conditions of identification and validation of identification are presented. Identified models are validated by comparison of vector diagrams, impulse response, and so on. Identification of a power network that consists of many generators is successful.

The PSS is a reasonable controller to stabilize the intertie and local oscillations of power networks. PSSs are usually set with the one‐machine infinite‐bus system model. The coordinated setting of the multiple PSSs considering the characteristics of the network is expected to improve stability. For this purpose, the Modal Performance Measure method is used to adjust the PSS parameters. The model is identified by the N4SID identification method. In this paper, the conditions of identification and validation of identification are presented. Identified models are validated by comparison of vector diagrams, impulse response, and so on. Identification of a power network that consists of many generators is successful. © 2012 Wiley Periodicals, Inc. Electr Eng Jpn, 181(2): 10–19, 2012; Published online in Wiley Online Library (wileyonlinelibrary.com). DOI 10.1002/eej.22287

No abstract