Mar 2013
Electricity Transmission
Voltage Transducers for Power Quality Measurements
Mar 2013
National Grid Electricity System Operator
National Grid TO Innovation Team
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Innovation Funding Incentive
Asset Management
To assess the suitability and accuracy of voltage transducers for power quality and wide band measurement.
The aims of this proposal are:

  • To devise test procedures for determining High Voltage (HV) and Extra High Voltage (EHV) voltage transducer frequency response. This can be incorporated in international standards such as IEC.

  • To determine frequency characteristic of typical Wound Voltage Transformers (WVTs) in National Grid's network and hence assess the accuracy of the historical data.

  • To examine the frequency response of Residual Current Devices (RCDs).

  • To examine the use of Capacitor Voltage Transformers (CVTs) for power quality measurements by considering the use of a new add-on device, the PQSensor, to a standard CVT. The device response and capability would be examined.

Key Deliverables:

  • Specification for source, test rig and procedure (4 months)

  • Design, build and commissioning of source and test (12 months)

  • Specification for reference measurement system. (1 months)

  • Design and build of reference measurement system (4 months)

  • Review and update of test specification (2 months)

  • Review and update of specification for reference measurement system (1 months)

  • Test on different type of Wound VTs (2 months)

  • Test on different type of RCDs (2 months)

  • Test on CVTs with new sensors. (2 months)

  • Analysis of data and reporting (6 months).