Ship shaft power generation system and method based on double PWM converters

A technology of shaft power generation and power generation system, which is applied in the direction of control system, control generator, vector control system, etc., can solve problems such as power loss of the whole ship, achieve good maneuverability, improve power quality and power transmission efficiency, and improve safety. Effects of Sex and Reliability

Inactive Publication Date: 2022-02-08
扬州青芒网络科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to propose a ship shaft power generation system and method based on dual PWM converters that solves the problem that the whole ship loses power when the main engine fails, and improves the safety and reliability of ship operation

Method used

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  • Ship shaft power generation system and method based on double PWM converters
  • Ship shaft power generation system and method based on double PWM converters
  • Ship shaft power generation system and method based on double PWM converters

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Embodiment

[0058] Stator resistance R s =2.875Ω, quadrature axis, direct axis inductance L d =L q =8.5mH, rotor flux linkage Moment of inertia J=0.0008kg·m 2 , the damping coefficient R Ω =0, number of pole pairs n p =4. The simulation time is 0.6s. The negative torque is input to the motor in the first 0.3s. At this time, it is used as the driving torque, and the shaft motor is in the power generation state; the positive torque is input to the motor in the last 0.3s. Electric operation, the whole system works under electric conditions. In the first 0.3s, the grid-side converter works in the unit power factor inverter state, the motor transmits electric energy to the grid, and the whole system is in the power generation state; in the next 0.3s, the grid-side converter works in the unit power factor Electric energy is delivered, and the system is in an electric state.

[0059] The invention proposes the control strategy of the PWM converter on the motor side and the PWM converter...

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Abstract

The invention relates to the field of power generation, in particular to a ship shaft power generation system and method based on double PWM converters. The system comprises a power generation system, and the power generation system comprises a main engine, an axle generator and two PWM converters; the main engine drives the axle generator to rotate through a gearbox, an alternating current generated by the axle generator is rectified into a direct current through a PWM rectifier, the direct current is inverted into a constant-voltage constant-frequency alternating current through a PWM inverter, and the constant-voltage constant-frequency alternating current is converted into a constant-voltage constant-frequency alternating current through a PWM inverter; and the constant-voltage and constant-frequency alternating current is connected into a power grid through the reactor. The invention also discloses the power generation method, wherein a permanent magnet synchronous motor is controlled through a motor-side converter, and a power grid is controlled through a power grid-side converter. The ship shaft power generation system and method based on the double PWM converters solve the problem that a whole ship loses power when a main engine breaks down and improve the safety and reliability of ship operation.

Description

technical field [0001] The invention relates to the field of power generation, in particular to a ship shaft power generation system and method based on dual PWM converters. Background technique [0002] PWM, the abbreviation of "Pulse Width Modulation" in English, referred to as pulse width modulation, is a very effective technology that uses the digital output of a microprocessor to control analog circuits. It is widely used in measurement, communication, power control and Transformation in many fields. The advantage of PWM is that the signal from the processor to the controlled system is in digital form, without digital-to-analog conversion, and keeping the signal in digital form can minimize the impact of noise. Most of the existing inland waterway ships are equipped with relatively high-power main engines and relatively small-power auxiliary engines, wherein the main engines are used to provide power for ship navigation, and the auxiliary engines are used to provide el...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J3/50H02K7/116H02K7/18H02M7/797H02P9/00H02P21/00H02P101/10H02P101/35H02P103/20
CPCH02J3/381H02J3/50H02P9/00H02P21/0003H02K7/116H02K7/1823H02M7/797H02P2101/35H02P2101/10H02P2103/20
Inventor 郑友权
Owner 扬州青芒网络科技有限公司
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