peter@pqrisk.com
0044 7443 433327

Power Quality Monitoring

Acquire advice and support for your substation project team on the specification of all aspects of the power quality measurement chain on an ad-hoc, day-rate basis.

Specification of Power Quality Monitors

There are many different monitors around and the selection of IEC61000-4-7 and IEC61000-4-30 Class A compliant monitors is likely to be a requirement for your project. Choice of monitor depends on what you want to use the data for: some are good for incident capture, others for steady-state. I can help you to select an appropriate system.

  • Design of connection point monitoring strategy
  • User-side system node monitoring
  • Advice on data processing systems


Transducer Selection and Position Guidance

Crucial to any harmonic- and transient-frequency measurement system, a high-bandwidth transducer is a requirement in most connection agreements and essential for HVDC, windfarm and non-linear load connection. Costs vary from £10k–£200k each but sometimes you can get VT provision for minimal additional cost through collaboration with the utility.

  • Site-specific analysis of voltage transducer opportunities
  • Guidance on quantity and location of voltage transducers
  • Support in CT and VT type specification and positioning


Power Quality Measurement Data Analysis

Different monitors create data in different formats: extracting and translating the data into meaningful information can be challenging but is an essential part of understanding—and sometimes defending—your system's performance in terms of power quality. There is statistical complexity to asserting whether a level of harmonic voltage distortion is compliant or not and I can help you to navigate this, and to ensure a risk-reflective response to measured non-compliance.

  • Extraction, manipulation and presentation of PQ data
  • Assessment of compliance at interface (PCC, PoC, PoE)
  • Utility liaison for compliance risk management


Incident Investigation

From time to time, plant can malfunction leading to high-frequency phenomena. Sometimes individual plant items are the cause, other times it's interactions between plant and the system under very specific conditions. PQ monitoring is key to understanding what happened post-event: What was the sequence of events? Was the interface point compliant at the time? Did an unmitigated system condition exacerbate or cause the event? Can blame be adequately assigned?

  • Collaborating with the utility to understand an event
  • Interpretation and presentation of findings
  • Culpability analysis and compliance verification


Contact me