The voltage on bus bars of the main switchboard of the ferry electrical power system during maneuvering - Open Research Data - Bridge of Knowledge

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The voltage on bus bars of the main switchboard of the ferry electrical power system during maneuvering

Description

The dataset is part of the research results on the quality of supply voltage on bus bars of the main switchboard of the ship's electrical power system in different states of ship exploitation. The attached dataset contains the measurement results carried out onboard the ferry during maneuvering.

The ferry is equipped in a three-phase, three-wire electrical power system. The source of electricity is three-phase synchronous generators driven by auxiliary diesel engines. Additionally, shaft generators driven by the propeller shaft of the main engine are used. The ship's electrical power plant consists of three free-standing generators of 1400 kVA each, and two shaft generators 1375 kVA each. The nominal voltage on bus bars of the main switchboard was 380 V with a frequency equal to 50 Hz. The free-standing generators have been the main energy source. The parallel operation of each shaft generator with the free-standing generators is possible, especially during a sea voyage with a calm wave surface. Additionally, each of the bow thrusters has been supplied of single shaft generators, the most frequently, in configuration separated from the main electrical power system. The voltage of 220V has been obtained using a transformer.

The voltage waveforms on bus bars of the main switchboard were recorder with the digital measuring system, which allows the simultaneous measurement of three phase-to-phase or two-phase voltages. The initial conditioning of the input signals is carried out by optoisolation amplifiers and a low-pass filter module (antialiasing). The formation of the output digital signal from the analog signal takes place in the a/d converter with a resolution of 16 bits and a sampling rate of up to 20 kS/s. Using three channels at the same time allows the maximum sampling rate of 6.6 kS/s. The block diagram of the digital measuring system is shown in Figure.

The files contain voltage waveforms of the output of a/d converters in [V], in three phases for 400 V and 220V networks. The attenuation and offset of the measuring path for the 220 V network are 77.6398 [V/V] and -0.017 V, respectively. For the 380 V network, the attenuation and offset of the measuring path are equal to 134.0123 [V / V] and -0.0175 V, respectively. The sampling frequency is inserted in the first row of the attached files.

The files are described as follows:

ferry_maneuvering_the value of the mains voltage (380 or 220)_in_K (entrance to the Karlskrona port)

ferry_maneuvering_the value of the mains voltage (380 or 220)_in_G (entrance to the Gdynia port)

ferry_maneuvering_the value of the mains voltage (380 or 220)_out_K (departure from the Karlskrona port)

ferry_maneuvering_the value of the mains voltage (380 or 220)_out_G (departure from the Gdynia port)

Illustration of the publication

The block diagram of the digital measuring system

Dataset file

ferry_maneuvering.zip
521.4 MB, S3 ETag a15088f1d7635c80a34daf823af70fc1-2, downloads: 61
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download file ferry_maneuvering.zip

File details

License:
Creative Commons: by 4.0 open in new tab
CC BY
Attribution
Raw data:
Data contained in dataset was not processed.

Details

Year of publication:
2020
Verification date:
2020-12-17
Creation date:
1999
Dataset language:
English
Fields of science:
  • Automation, electronic and electrical engineering (Engineering and Technology)
DOI:
DOI ID 10.34808/t5rg-cp75 open in new tab
Verified by:
Gdańsk University of Technology

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