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Railway Power Analysis and Power System Testing

High-speed and high-channel-count data acquisition solutions for railway testing applications like pantograph and conductor rail testing, short circuit analysis and power system testing.

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Railway Power Analysis and Power System Testing

Pantograph and Conductor Rail Testing

Train and railways are operated either with either DC or AC power. They are operated at different voltage levels (250 V up to 66 kV) and different line frequencies (16.7Hz, 25Hz, 50Hz, 60Hz). The trains get the power whether via a pantograph which is connected to overhead lines or via a conductor rail (3rd rail).

Testing the power supply system requires a high-precision DAQ system that supports a wide range of input signals like voltage, current, acceleration, GPS parameters, CAN-bus data, video, and displacement. Especially synchronised video is very important and useful for comprehensive analysis (Monitoring connection of pantograph to overhead line, interaction of rails and conductor rail etc.). In addition to the high voltages also the high operating currents up to 8000A are present which require special current transducers (AC and DC).

Pantograph and Conductor Rail Testing

Short Circuit Analysis

Short-circuit analysis at railway power supply systems is a typical application for the Transient recording function of the Dewesoft power analyzer. At the expansion of short- circuits in railway power supply systems it is often assumed that the short-circuit current is split into thirds. 1/3 flows via the return conductor, 1/3 via the rail track and 1/3 into the earth. In reality, the results differ a lot and strongly depends on the ambient conditions (grounding, soil, etc.).

The Dewesoft power analyzer allows measuring the expansion of the short-circuit with automatic evaluation. Parameters like peak current, AC and DC part of the short circuit, time of the short circuit and a lot more can be calculated. Furthermore, high-speed cameras and thermal imaging cameras can be connected to the system and acquired synchronously for comprehensive analysis.

Typical configuration

For the typical configuration we recommend R2DB data acquisition system configured for:

  • 1x Voltage

  • 7x Current

 

Highlights

  • High sampling rate

  • Raw data storing

  • Triggering on different channels (analog, digital, math, power, power quality etc.)

  • Analysis at all line frequencies (16.7Hz, 50Hz, 60Hz, etc.)

Short Circuit Analysis
Short Circuit Analysis

Power System Testing

The electrical power for the train systems is either provided by a third rail or an overhead line via a pantograph. Inside the rail, the power has to be transformed to allow the operation of the different equipment. Typically, a train at first transforms the high supply voltage (e.g. 15 kV) down to a lower voltage range (< 1000 V). The power is then further transformed to different voltage levels and inverted to different frequencies (e.g. 16.7 Hz, 50 Hz, 25 Hz, DC).

Becuase of this the testing of the power system of railways needs a high channel count and the possibility to analyze at different voltage levels and frequencies. Dewesoft can easily provide a one-box solution for such tests.

    Typical configuration

    For the typical configuration we recommend R8D data acquisition system configured for:

    • 1x 3-phase power

    • 3x 1-phase power

    • 3x DC power

     

    Highlights

    • Voltages up to 66 kV
    • Currents up to 8000 A
    • DC and AC power (16.7 Hz, 25 Hz, 50 Hz, 60 Hz)
    • Video, GPS, acceleration, CAN, displacement, etc.
    Power System Testing
    Power System Testing

    Applies to Products

    View product R2DB

    R2DB

    Compact, mobile, and portable data acquisition systems that feature a built-in data logger, powerful data processing computer, multi-touch display, and internal batteries for maximum portability.

    View product R8

    R8

    High channel count data acquisition system with built-in data logger and powerful data processing computer, touch screen display (R8D) and internal batteries (R8B, R8DB) for maximum portability.

    View product Current Sensors

    Current Sensors

    High-accuracy sensors for AC/DC current measurement and power analysis. From current clamps to high-precision zero flux current transducers and Rogowsky coils.

    Our current transducers are a perfect fit for our data acquisition systems and can precisely measure AC/DC current with up to 0.03% accuracy. TEDS equipped for automatic detection and setup.

    View product DewesoftX

    DewesoftX

    DewesoftX is an award-winning data acquisition software for test & measurement and monitoring. Experience data recording, signal processing, and data visualization like never before.

    DewesoftX DAQ software received multiple international awards, is innovative and easy-to-use, but at the same time very deep in functionality. Our mission is clear - one software for all test and measurement applications.

    View product Power Analyzer

    Power Analyzer

    The Dewesoft Power Analyzer is not only the smallest power analyzer in the world, but it’s also the most powerful one. The flexible hardware platform combined with powerful software features gives unique testing possibilities for any kind of electrical measurement.

    Dewesoft power analyzers can accurately measure direct high-voltage and current signals but do not stop there. They can also measure vibration, temperature, GPS/GNSS, CAN bus, video, and many other data fully synchronized.

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