RU1798864C - Electromachine unit - Google Patents

Abstract

Usage: reverse brushless excitation systems of synchronous machines operating in the mode of deep consumption of reactive power. SUMMARY OF THE INVENTION: A synchronous machine contains two field windings, a pathogen with two multiphase core windings and two rotating thyristor sets. Thyristor sets on the AC side are connected to the main windings of the exciter, and on the DC side - to the excitation windings of the synchronous machine and are interconnected. 1 ill.

Description

The invention relates to the field of electrical engineering and can be used in synchronous compensators.

An object of the invention is to improve the performance of an electric machine unit.

The drawing shows a diagram of an electric machine unit. For convenience, the magnetic system of a synchronous electric machine is shown as bipolar, the thyristor system control system is not shown, since it does not concern the essence of the solution.

The electric machine unit contains a synchronous electric machine with a stator 1 and its winding, with a rotor 2. at the poles of which are two field windings 3 and 4, creating a magnetic flux along the longitudinal axis, two rotating thyristor sets 5 and 6, an inverted synchronous generator - exciter with two combined on a single cortex separate multiphase root windings 7 and 8 and an excitation winding 9;

Each of the Thistor sets is connected from the AC side to one of the main windings of the pathogen.

Field windings 3 and 4 are interconnected by a conductive jumper 10 in such a way that when the same current passes through them, a magnetic flux of the same direction is generated in the pole cores. On the AC side, each of the thyristor sets is connected to one of the root windings of the pathogen. On the DC side, the opposite terminals of the thyristor sets 5 and 6 are connected to each other by a current lead 12, and this common point is connected by a current lead 13 to the beginning of the winding 4. The second terminal of the thyristor set 6 is connected by a current lead 11 to a conductive jumper 10 connecting field end 4 s on brf

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the first of the field winding 3. The second terminal of the thyristor set 5 is connected by a current lead 14 to the end of the field winding 3.

The device operates as follows. When applying to the thyristor set 5 control pulses corresponding to the rectifier mode, and to the thyristor set 6 - control pulses corresponding to the inverter mode, the excitation current flows from the windings 7 through the cathode group of the set 5, the current lead 14, the excitation winding 3. current-carrying jumper 10, field winding 4, current path 13, current path 12, anode group of kit 5 to windings 7. When current flows along the field windings 3 and 4 of this direction, the right pole becomes north N, left - south S, and blue Ronn electric machine operates in a mode of reactive power issue. When 5 control pulses corresponding to the inverter mode are applied to the thyristor set 5 and control pulses corresponding to the rectifier mode are supplied to the thyristor set 6, the excitation current flows from the windings 8 through the cathode group of the set 6. current lead 12, current lead; 13, field winding 4, conductive jumper 10, current lead 11, anode group of kit 6 to windings 8. When the reverse current flows through field winding 4, the polarities of the poles are reversed compared to the previous case (shown in parentheses in the drawing) and the synchronous electric machine is in reactive power mode. In both cases, leakage is possible in the inverter

closed-loop equalization current, consisting of a current lead 14, field winding 3, a jumper 10, a current lead 11, a thyristor set 6, a current lead

12, thyristor kit 5.

The main advantage of the proposed electric machine unit operating as a synchronous compensator is the possibility of its operation in the mode of deep consumption of reactive power, as a result of which the range of regulation of reactive power in the power system is significantly expanded.

Claims (1)

The claims An electric machine unit, including a synchronous electric machine, the rotor of which has two field windings, a pathogen with a multiphase root winding and rotating system for rectification of alternating current, with the exception that in order to improve operational characteristics, the pathogen is equipped with a second multiphase root winding a rectification system contains two thyristor sets, each of which is connected from the alternating current side to one of the main windings of the exciter, and from the direct current side the thyristor sets are interconnected by opposite terminals and this common point is connected to the beginning of one of the excitation windings synchronous machine, the second output of one of the thyristor sets is connected to the end of this excitation winding of the synchronous machine and to the beginning of the second excitation winding, and the second output of another thyristor set is connected to the end of the second winding neither. G