Development of advanced power system analog simulator

Abstract

The digital simulation method has been utilized to analyze phenomena in power systems. Since different algorithms can be applied, depending on the phenomena to be analyzed, digital simulation allows for high‐precision analysis. However, it also has a disadvantage: it produces continuous phenomena which occur in actual systems only fragmentarily. Thus, when discussing important projects at research centers such as IREQ in Canada, an analog simulator issued to continuously analyze the phenomena from the moment the fault occurs until steady state. These analog simulators, however, consist of only a few generator models. They are only effective for analyzing phenomena in small‐scale systems and do not allow for analysis of phenomena in large‐scale systems over a long period of time. For this reason, the Kansai Electric Power Company (KEPCO) in cooperation with Hitachi, Ltd., and Fuji Electric Co., Ltd., has developed the world's largest power system simulator (APSA: Advanced Power System Analyzer). The simulator will be used to analyze the evolution of accidents in actual systems and to analyze continuous system phenomena over a long period. This paper describes an outline of the simulator.

An induction machine model for an analog power system simulator

“…The parameters of gain and time constants in analog circuits can be changed by either manually adjusting the potentiometer or by switching the selection of resistors or capacitors [3]. The manual adjustment has low repeatability because of the nature of manual operations.…”

“…The power system analysis and the factory test of the controller or protection system are carried out effectively by using real-time analog simulators [1][2] [3]. The analog simulators require more detailed equipment models with electrical characteristics closer to actual equipment.…”

OTA‐based transmission line model with variable parameters for analog power flow computation

“…AC network analyzers were first developed in the 1920s to model and solve problems associated with power distribution systems [7] and are still used in certain applications today [8]. In addition, analog computation of power transmission lines has historically been examined in research [9][10][11][12].…”