Investigation of Autonomous Power System Stability Improvement Methods

Abstract

The paper proposes measures to increase the stability of autonomous power systems. The considered autonomous power system could be connected to a regional system for power flow exchange or operate in the “island” mode. In the analysis of stability, it is assumed that there is a connection with the regional electric power system or the presence of several power plants in the autonomous system, combined for parallel operation. Autonomous systems are usually located in remote areas, far enough from regional power systems. A transmission line connecting an autonomous system to a “large” electrical system can have a rather low transmission capacity. This is due to both the desire to reduce the cost of the line and its functional purpose. Initially, it is not supposed to transfer significant amounts of energy through the line, its main function is to provide an autonomous system with some volumes of electricity in case of accidents. In addition, excess power of an autonomous system can be transmitted over the line or power can be received when a deficit occurs. The low bandwidth of a communication line with a “large” system leads to a deterioration in static and dynamic stability.