Optimization and control for thermal power plant based on plantwide control

In order to achieve the economic distribution of the power unit and to ensure the area voltage quality and meet the separation of generation and the economic dispatch, according to the design and equipment configuration of the direct transfer mode of the dispatching system. On the supervisory level, a new power plant control architecture based on plantwide control is proposed. The plant-level optimal load distribution system and the voltage and reactive power control system on the plant side will be integrated into the electrical power plant network control system and constitutes the collaborative optimization control system with the voltage and reactive power on the plant side. The design not only realizes their function, but also interacts with each other information. It adopts the integrated idea, which makes the acquiring information and executing command more fluently and achieves the active power´s economic dispatch and the reactive power´s optimization distribution. At the same time, on the optimization and control level, in order to get more information about the power plant side from the dispatching level, excitation system model based common information model (CIM) is built in the network control system, which is designed based on the analysis of current excitation systems. and embedded into existing CIM by inheritance and association. it will be a bridge between the voltage and reactive power control system and energy management system, Which will be a better guarantee of the power plant side of the AVC control for the accuracy and security.