Automatic Prognostic Regulators of Distributed Generators

Abstract

A trend associated with distributed generator usage is currently being developed. Distributed generators allow to unload the main grid and enhance reliability of consumer power supply, and electric energy quality. In this case, the problem of finding the optimal settings of automatic field / speed regulators shall be solved to provide reliable operation and integration of distributed generators made of synchronous turbo and hydro-generators in power supply systems. This requires usage of large-scale power supply systems and laborious calculations of a large number of interconnected parameters. The other approach providing regulator adjustment by one parameter is possible as well. In this regard, it is proposed to transfer from the adjustment by a current error value to the control implying prognosis calculation. A regulator, which controls a device by a prognosis value, is called as prognostic. The article describes an automatic prognostic speed regulator of a distributed synchronous generator; the influence of an automatic prognostic regulator on frequency control quality in a power supply system, while its operation mode varies, is studied. Results of computer modelling show that usage of an automatic prognostic speed regulator under disturbances of power supply systems allow to enhance quality of frequency control in a power supply system containing distributed generators. The proposed automatic prognostic speed regulator can be used to enhance reliability and integration of distributed generator power supply systems