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Ship power supply system electric energy quality on-line monitoring and evaluation device

A technology of power quality and power supply system, applied in measuring devices, testing electrical devices in transportation, measuring electricity, etc., to achieve the effects of ensuring reliability and stability, optimizing control, and realizing comprehensive utilization

Pending Publication Date: 2021-02-09
中国船舶重工集团公司第七0四研究所
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to conduct on-line monitoring and real-time evaluation of the power quality of the ship power supply system to solve the problems of power quality and electromagnetic compatibility caused by power electronic devices in the existing ship power supply system

Method used

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  • Ship power supply system electric energy quality on-line monitoring and evaluation device
  • Ship power supply system electric energy quality on-line monitoring and evaluation device
  • Ship power supply system electric energy quality on-line monitoring and evaluation device

Examples

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Embodiment Construction

[0028] Below in conjunction with specific embodiment, further illustrate the present invention. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

[0029] The invention provides an online monitoring and evaluation device for power quality of a ship power supply system, which is used for online monitoring and evaluation of the power quality of a ship's electric propulsion AC / DC power supply system, including surge current, current unbalance, and pulse load of the power grid. , jump load, harmonic analysis, voltage deviation, voltage drop, transient voltage deviation, peak v...

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Abstract

The invention provides a ship power supply system electric energy quality on-line monitoring and evaluation device which is used for on-line monitoring and evaluation of a ship electric propulsion AC / DC power supply system. The device comprises surge current, current unbalance degree, pulse load, jump load, harmonic analysis, voltage deviation, voltage drop, transient voltage deviation, peak voltage, ripple voltage, relative value of voltage change, line voltage unbalance degree, frequency deviation, transient frequency deviation, transient frequency recovery time and frequency periodic change. The device has the functions of man-machine interaction, historical data query, waveform analysis recording and data communication, can adaptively correct the evaluation weight of the electric energy quality index, gives an electric energy quality comprehensive evaluation result in real time, has the minimum monitoring duration of 0.8 us for the electric energy quality characteristic parametersof the electric propulsion AC / DC power supply system, has the sampling precision reaching 2.498 mV, and the process from sampling to data analysis of 69 electrical measurement channels is completed within 50ms.

Description

technical field [0001] The invention relates to an online monitoring and evaluation device for power quality of ships, in particular to an online monitoring and evaluation device for power quality of AC and DC power supply systems for electric propulsion ships. Background technique [0002] Integrated electric propulsion ships have the characteristics of excellent control performance, energy saving and emission reduction, flexible layout and good economy. Green and low-carbon is the mainstream trend of today's ships. With the extensive application of integrated electric propulsion systems on engineering ships, scientific research ships, offshore platforms and hybrid ships, and the infiltration of multiple energy sources, a large number of power electronic devices, such as multi-pulse Weak electric power devices such as rectifiers, four-quadrant inverters, wind / light / hydrogen / storage converters have brought great challenges to the power quality and electromagnetic compatibili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08G01R31/00
CPCG01R31/086G01R31/088G01R31/001G01R31/008
Inventor 付文秀王良秀王平张学瑾胡斌张元玮文勇薛君赵张飞
Owner 中国船舶重工集团公司第七0四研究所
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