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In view of the problem of non electromechanical mode oscillation in the process of the operation of the N area network in Gansu area, the cause of the accident caused by the improper governor parameter of the main unit in the isolated network is obtained by the fault simulation and field recording. Based on the analysis of PSASP small interference analysis and PSASP-GOV oscillation mode, the hidden trouble of excitation system and speed regulation system of Gansu power network is analyzed, and the recommended parameters of the operation mode of the unit are given. Finally, the measures to improve the stability of the isolated network are given. 1 Preface With the increase of the scale of the modern power grid interconnection, the oscillation of the system has become one of the most important factors which restrict the safety and stability of the network. At present, the research on the power system oscillations is mainly focused on the mechanical and electrical oscillations. With the development of the power grid, the non electromechanical oscillation mode has been paid more attention. In this paper, the problem of non electromechanical mode oscillation in the process of the operation of N in Gansu area is analyzed, and the cause of the accident is analyzed by means of fault simulation. On this basis, through the PSASP small interference analysis, PSASP-GOV oscillation mode analysis, the investigation of the Gansu power grid excitation system, speed control system instability. Through simulation and optimization, the parameters of the model are recommended, and the rationality of the parameters is verified by field test. In view of the non electromechanical oscillation problem in the operation of the N area, the measures to improve the stability of the network are given.

A Research On The Parameter Optimization And Field Test Of The Simulation Speed Regulator For The Isolated Network Of Gansu Power Grid