Transformer ratio control of power transformers
- Research assistant G.V. Plekhanov Saint Petersburg State Mining Institute
Abstract
The work is devoted to the problems of voltage mode regulation of electrical installations at the enterprises of mining industry. The method of voltage mode regulation by means of automatic change of power transformer transformation ratio under load (RAP) at voltage deviation from the rational level and technical means of regulation and their design are considered. A block diagram of a voltage mode regulating device is given. An algorithm for the decision making by the regulating device for the issuance of control action to regulate the voltage in the automatic control unit is developed. A diagram showing the dependence of the lifetime of contacts from the load current of one of the ABB tap changers, as well as daily graphs of voltage on the buses of substations before and after the introduction of automatic regulation is presented.
None