The small heat - Electroenergy cogeneration plants in Latvia rural energetics

The paper reports on the research and operation of small heat - electroenergy cogeneration plants in Latvia. Their technical and economical parameters are given. Research results on normal operation and overload regimes of induction machine as an asynchronous generator are analysed. Actual problems of protection and automatic control of AC generator with gas-diesel drive are executed by the P-I pulse control and by permanent velocity gas value servomotor. Stability and quality of control systems transient response are simulated and optimised by computer. Criteria for parameter adjustment of the P-l pulse controller are obtained.