Abstract
For more rational operation and control of the future electric power system which would continue to expand in size and complexity, an autonomous decentralized control system is proposed as one of the new control architecture. Under the autonomous decentralized control system, each generating station and substation behaves independently and cooperatively without being controlled by the central station. Besides the inherent fault tolerant characteristics of the architecture, flexible and rapid control depending on the circumstances can be achieved.
In this paper, the fundamental logic of preventive control under autonomous decentralized system is developed. It is based on the bidding method in which each station proposes own output taking its own situation and cooperation with others into consideration. The economic load dispatch including preventive control can be performed based on the bidding rule adopting the equivalent incremental generating cost curve in which the security constraints are incorporated. Application of the logic to a model system revealed satisfactory control performance for preventing the overload of transmission lines and the undervoltage.
