Modeling of Automatic Generation Control of Thermal Unit

Abstract

Automatic generation control (AGC) is an essential requirement of modern power system automatic control. At present, slow response to AGC load demand is a serious problem existing in thermal power units taking part in AGC, which makes the control performance of power system AGC poor. The unit one and unit two of are all boiler, its boiler-turbine coordinated control system (CCS) is based on incremental state observer combined with conventional PID control, and the connection logic of CCS with AGC adopted the scheme shown in this paper. Through adopting the connection logic of CCS with AGC, the pre-add coal function can be realized in AGC mode, which assured the rapid response to AGC load demand of the power unit, and this viewpoint has been fully proved by the trend curves of AGC adjusting test of the two units. And at the last market structure is considered. Availability of frequency based tariff scheme is employed. Demand can be managed by managing the tariff. Therefore to make system in normal State need to study management in generation as well as demand. The objectives are: 1. To develop simulation model for each component of AGC and AVR loops. 2. To develop AGC model considering generating rate constraints. 3. To develop model for coupled automatic generation and voltage control. 4. To develop AGC model based on market structure. The approach to this solution will include research of the approaches and application of real world values in these approaches. It is expected that research will add the world of AGC struction on demand side management.