Scientific and Technical Journal

ELECTROTECHNIC AND COMPUTER SYSTEMS

ISSN Print 2221-3937
ISSN Online 2221-3805
QUICK SYSTEMS OF VOLTAGE STABILIZATION OF GENERATORS WITH VARIOUS FEEDBACKS
Abstract:
By implementation of automated control systems with feedbacks on the power electric stations and substations it can be significantly improve qualitative characteristics of electrical energy. Modern elements of automatics (controllers and sensors) can be used to stabilize of voltage with high precision (about 0.1 %) and quick acting time before 1sec. The supply of electricity to consumers without power surges will enable them to put into operation industrial enterprises that produce competitive products. The report presents the results of the study of dynamic regimes for controlling the voltage stabilization of high-power generators of both the supplied and alternating currents using various types of regulators, including digital ones. The control system with a proportional-type controller (P) is simple, but this system is characterized by inaccuracy, i.e. Static voltage drop. The control system with a proportional-integral controller (PI) does not have a static error, but is more inertial. The system with a proportional-integral-differentiating type (PID) controller is relatively complicated, but with load variation it is characterized by a smaller dynamic voltage drop and a maximum speed (0.5 sec.) in transient regimes. The dynamic voltage drop is further reduced when the feedback control system is added (together with the main feedbacks). The optimum parameters of the regulators are determined by the method of logarithmic frequency characteristics.
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References
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2017-11-18 04:33:29

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