UA148413U - ADAPTIVE REACTIVE POWER COMPENSATION SYSTEM IN ELECTROMACHINE INSTALLATIONS - Google Patents

Abstract

The adaptive reactive power compensation system in electric machines consists of a synchronous electric machine, which is rigidly connected to the asynchronous electric machine and is connected to the propeller shaft line between the internal combustion engine and the propeller by means of quick-release couplings. The asynchronous electric machine contains several additional windings on the stator, which form, together with the rotor, an additional asynchronous motor of reduced power.

Description

The useful model belongs to the field of ship multi-engine power plants (1,

A known system consists of a battery of capacitors connected according to the "triangle" scheme and distributed into several blocks with different capacities and a control unit |Z.

Disadvantages of the system, which are due to the use of a battery of capacitors: the need for a discharge circuit to remove the residual charge when disconnected from the network; - impossibility of smooth adjustment of reactive resistance; - the need to have a system for maintaining the temperature regime of capacitors; - the danger of breakdown of the insulation of capacitors during overvoltage, which occurs during resonance on the elements of the capacitor bank; - explosiveness.

The closest analogue is a system consisting of a control unit, a synchronous electric machine, which is rigidly coupled, with equal power, an asynchronous electric machine, and is connected to the line of the propeller shaft between the internal combustion engine and the propeller by means of quick-disconnect couplings (|4 -61.

Disadvantages of the system, which are due to the use of an asynchronous machine, the power of which is equal to the power of a synchronous machine: - increased energy consumption for the asynchronous drive to compensate for reactive power at partial load modes; - the difficulty of regulating the power of an asynchronous machine; - presence of excess power generated by a synchronous machine; - reduced inter-repair period of system elements due to use in full load mode.

The basis of the useful model is the task of creating an adaptive reactive power compensation system in electrical machinery installations, which significantly reduces energy consumption, effectively compensates reactive power in partial load modes, reduces the load on system elements, and at the same time preserves the simplicity and reliability of schematic solutions of systems of known types.

The problem is solved by the fact that the adaptive compensation system is reactive

Of the power in electric machine installations, consisting of a synchronous electric machine, which is rigidly coupled to an asynchronous electric machine and is connected to the propeller shaft line between the internal combustion engine and the propeller by means of quick-disconnect couplings and, according to a useful model, the asynchronous electric machine contains several additional windings on the stator, which form, together with the rotor, an additional asynchronous motor of reduced power.

The technical effect is achieved due to the fact that the combination of electric machines provides: - an increase in the ranges of modes of use of the power plant and the propulsive complex of the ship; - reduction of energy consumption for compensation of reactive power in ship electrical networks; - reducing the load on system elements; - Increasing the inter-repair period of generating and power elements of the ship's electric power system.

The essence of the useful model is explained by the drawing of the adaptive reactive power compensation system in electric machine installations, which shows the internal combustion engine 1, electric synchronous 2 and asynchronous Z machine. Synchronous and asynchronous machines are tightly connected to each other. An asynchronous electric machine, in addition to the main excitation windings, contains several additional windings on the stator, which form, together with the rotor, an additional asynchronous motor of reduced power.

The connection to various sections of the propeller shaft of electric machines is carried out using quick-disconnect couplings 5 and 6. The control unit 4 sets the switching modes of the quick-disconnect couplings and directs electricity to the electric machines and the main switchboard 7. The torque in the driving mode is transmitted to the propeller screw 8.

Commands for selecting the system application mode and power redistribution between its elements are generated as a result of a multifactor analysis of the load of the power plant.

In the first dynamic mode (mode of cargo operations with partial use of ship's cargo equipment, quick disconnect couplings are open), the control unit directs power from the main switchboard to the additional windings of the asynchronous 60 machine, there is no power to the main windings. Asynchronous machine, with reduced power,

drives a synchronous machine. In a synchronous machine, by regulating the excitation current, reactive power is generated in the electrical network. In this case, the synchronous machine works with a leading so5 f. Thus, reactive power is compensated (1, 7, 81.

In the second dynamic mode (mode of cargo operations with full use of ship's cargo equipment, quick disconnect couplings open), the control unit directs power from the main switchboard to the main windings of the asynchronous machine, there is no power to the additional windings. An asynchronous machine, with full power, drives a synchronous machine. In a synchronous machine, by regulating the excitation current, reactive power is generated in the electrical network. In this case, the synchronous machine works with a leading so5 f. Thus, reactive power is compensated. In the control unit, the generation of corrective signals occurs exclusively on a real-time scale. This is caused by the requirement to respond adequately to changes in energy consumption conditions in the ship's electrical networks.

Sources of information: 1. Moskalenko, V.V. Automated electric drive. - M.: Znergoato-mizdat, 1986. - 416 p. 2. Sudovoi mechanik: Reference book / Edited by A.A. Foka. - vol. 1 - Odessa: Phoenix, 2010. - 1036 p.

Z. Gevorkyan, M.V. Modern reactive power compensation components (for low-voltage networks). - M: Doja Publishing House, 2003. - 64 p. 4. Patent of Ukraine for utility model Mo 85542. IPC (2013.01) VbZN 21/00. The power transmission system of the ship's engine to the propeller / V.A. Shcherbinin; applicant and patent holder Shcherbinin, V.A. - statement 05/07/2013. - publ. 25.11.2013, Bull. Mo 22. 5. Lukovtsev, V.S., Khanmamedov, S.A. and Shcherbinin, V.A. Features of the operation of a combined engine as part of a ship's propulsion system // Ship's deenergizing installations. - 2008. - Air Force. 21. - pp. 87-91. 6. Lukovtsev, V.S., Shcherbinin, V.A., Sandler, A.K. The system of power transmission of the ship's engine to the propeller // Sudovye zenergetycheskie ustanasty. - 2015. - Vip. 35. - pp. 189-193.

From 7. Horev, A.A. Transient process of synchronous machines. - L.: State Energy Publishing House, 1950. - 232 p. 8. Grigoriev, A.V. Variant of control of electromagnetic torque, flux and current of an asynchronous electric motor // Bulletin of the Kuzbass State Technical University. - 2011. - Mo. 5. - P. 87-92.

Claims (1)

USEFUL MODEL FORMULA An adaptive reactive power compensation system in electric machine installations consisting of a synchronous electric machine rigidly coupled to an asynchronous electric machine and connected to the propeller shaft line between the internal combustion engine and the propeller by means of quick-disconnect couplings, characterized by that an asynchronous electric machine contains several additional windings on the stator, which form, together with the rotor, an additional asynchronous motor of reduced power. I, I, I, I, I, I, I, I, I, I, I, I, I, I, I, I, I, I, I. ! And in TA