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Measurement for Grid power quality

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Some regulations or specific contracts require energy providers to keep voltage characteristics at any supply terminal within specified limits. These specifications cover limits or values related to voltage, frequency, rapid voltage changes, harmonics, interharmonics, unbalance, dips, swells, interruptions, flicker, ….

Measurements are typically made on the energy provider side (to check delivered energy complies to the contract) and on the consumer side (to check received energy complies with the contract) with Power Quality Instruments class A according to IEC 61000-4-30.

Application assessment standard Measuring methods standard Product standard
Logo CENELEC.png EN 50160
Voltage characteristics of electricity supplied by public electricity networks
Logo IEC.png IEC 61000-4-30 class A
Testing and measuring techniques – Power quality measurement methods
PQI (Power Quality Instruments)

Logo IEC.png IEC 62586-1 Logo New.png
Power quality measurement in power supply systems - Power Quality Instruments (PQI)
and
Logo IEC.png IEC 62586-2 Logo New.png
Power quality measurement in power supply systems - Functional tests and uncertainty requirements
(Compliance to IEC 62586-2 means compliance to IEC 61000-4-30)
Logo IEC.png IEC/TS 62749 Logo New.png
Assessment of Power Quality – Characteristics of electricity supplied by public electricity networks

Fig. S7Standards for Grid power quality assessment

Fig. S8Examples of products compliant with IEC 61000-4-30 for Grid Power Quality