Providing offshore and oilfield power quality site services worldwide…

Harmonic Solutions Oil & Gas (HSOG), based in the United Arab Emirates also have engineers in the United Kingdom.  We are specialists in oilfield (onshore and offshore) harmonics, power quality and conducted EMC. We offer investigative site PQ and conducted EMI services, audits and consultancy.

HSOG PQ engineers can mobilise rapidly….

Site PQ services include :

  • Harmonics, power, power quality and conducted EMI surveys/audits
  • PQ investigations into oilfield/offshore equipment malfunction/failure
  • Diagnosis and monitoring of common mode voltage and current (due to VFDs) and other EMC issues
  • Studies (including harmonic modelling) on harmonics and related topics for offshore and oilfield power systems
  • Consultancy into all aspects of offshore and oilfield PQ

Very advanced harmonics, PQ and EMI measuring equipment

For investigations, Harmonic Solutions Oil & Gas utilise advanced, cycle by cycle power quality recorders which capture every single cycle and harmonics to 512th (voltage) and 256th (current), capture every PQ event and record over 5000 power and PQ parameters automatically. The data captured is then analysed by powerful investigative software.

Samples of PQ measurements :

Average and min/max THDu on a drilling rig during back-reaming
Monitoring of common mode voltage on a drilling rig during investigations
Example of 3rd and 21st harmonic voltage investigation on a drilling rig

Common mode and other EMI measurements

Advanced 200MHz digital storage oscilloscopes with spectrum analyser capability for detailed waveform analysis are utilised for SCR drive line notching, voltage spikes and common mode voltage/current monitoring. High voltage (2kV) probes and CAT1V 1000V equipment plus dedicated Rogowski coils for current measurement ensures the capability to measure at most demanding applications.

1100kW mud pump VFD under test

For medium voltage power systems dedicated VTs and CTs are used. Special micro-fibre probes are used with 200MHz oscilloscopes to measure shaft voltages on generators and motors.

For common mode and other EMI measurements, portable EMC spectrum analysers (1Hz to 30MHz) are also used together with differential adaptors and attenuation units for conducted common mode voltage and current measurements, near field probe kits and antennas for radiated emissions and sophisticated software to facilitate detailed reporting.

Common mode voltage as captured on a production platform
Example of common mode voltage spectrum
Example of common mode voltage and current on a 1100kW, Exe mud pump motor

Dedicated Power Quality Engineers

Harmonic Solutions Oil & Gas PQ engineers are fully qualified electrical engineers to PhD level with extensive experience in harmonics, power quality and EMC, both offshore and onshore. All PQ engineers have considerable knowledge in other associated electrical disciplines including variable speed drives (AC and DC), generators, motors and other electrical equipment.

All engineers involved in drilling and offshore work are BOSIET (inc. HUET), MIST certified and have valid medical certificates. For applicable countries, Yellow Fever and AIDs (negative) certificates and Police Reports from countries of residence are available. Negative COVID-19 test certificates and vaccine passports, when applicable, can be provided.

At the conclusion of every audit or investigation a comprehensive report is issued

Sample of customers:

  • Awilco Drilling
  • National Oilwell Varco
  • Atlantica
  • Seawolf Oilfield Services
  • Lamprell Energy
  • Chevron
  • Sapura Drilling
  • Canadian Natural Resources
  • RDS Oil
  • Noble Denton
  • Century 25
  • Addax Petroleum
  • Atwood Oceanic
  • Apache North Sea
  • Anglo Eastern
  • Total


For more information on common oilfield/offshore PQ problems click here.

Please contact Harmonic Solutions Oil & Gas if you require our specialist services by clicking here.