IEC 61850 MHAI Module
The IEC 61850 MHAI module represents the Harmonics (MHAI) Logical Node in IEC 61850 protocol.
Module icon
Overview
By default, it maps the appropriate ION values to their IEC 61850 counterparts. The MHAI Logical Node provides calculated harmonics and related values for voltage and current. These values are generally used for power quality purposes. Only one instance of this module can exist. Because this module is specific to supporting the IEC 61850 protocol, it can be deleted if IEC 61850 is not required.
For more information about IEC 61850, please refer to the IEC 61850 and ION Technology protocol document.
NOTE: In the module graphic above, the output registers for the magnitude and instantaneous magnitude are represented as a single register. Refer to “Output Registers” for details.
NOTE: This module is configured as part of the meter’s implementation of the IEC 61850 protocol. Manual creation and configuration of this module, or modification of an existing module, is an advanced feature that should only be undertaken by personnel with a thorough understanding of ION and IEC 61850 protocols, and the system in which the meter is installed.
NOTE: The registers and settings available in this module depend on the device or node you are configuring, as well as its firmware and template versions. Not all registers or settings are available on all devices or the Virtual Processor, and labels may vary.
Inputs
The MHAI module inputs are the outputs of the Harmonics Measurement, Harmonics Analyzer, and the Power Meter module. These default connections will vary depending on the device and firmware version.
V1 HAR ... V4 HAR
These registers are connected to any numeric output register on the corresponding Harmonics Analyzer or Harmonics Measurement module.
I1 HAR ... I5 HAR
These registers are connected to any numeric output register on the corresponding Harmonics Analyzer or Harmonics Measurement module.
V1 HME ... V3 HME
These registers are connected to any numeric output register on the corresponding Harmonics Measurement module. These registers must either be all connected or all disconnected to their corresponding default Harmonics Measurement modules for the MHAI module to go online.
I1 HME ... I5 HME
These registers are connected to any numeric output register on the corresponding Harmonics Measurement module. These registers must either be all connected or all disconnected to their corresponding default Harmonics Measurement modules for the MHAI module to go online.
Freq
This input is linked to the Freq output register on the Power Meter module, which contains the system frequency (fundamental frequency of phase A voltage).
NOTE: The Freq input is not affected by the Harmonics Measurement or Harmonics Analyzer modules.
Setup registers
The MHAI module has no setup registers.
Output registers
These registers are formatted and named according to IEC 61850 protocol standards.
NOTE: The IEC 61850 harmonics arrays are only available using IEC 61850 protocol. Refer to “Detailed Module Operation” for more information.
Hz.instMag, Hz.mag
These registers contain the instantaneous and deadbanded values for system frequency. Units are Hz.
NOTE: The frequency outputs are not affected by the Harmonics Measurement or Harmonics Analyzer modules.
Hkf.phsA.instCVal,
Hkf.phsA.cVal, Hkf.phsB.instCVal, Hkf.phsB.cVal, Hkf.phsC.instCVal,
Hkf.phsC.cVal, Hkf.neut.instCVal, Hkf.neut.cVal, Hkf.net.instCVal,
Hkf.net.cVal
These registers contain the instantaneous and deadbanded K factor values for phases A, B and C, including neutral and net values. Depending on the Power Meter module’s Volts Mode, some or all of these registers may be not available. Refer to the Power Meter module for more information.
ThdA.phsA.instCVal,
ThdA.phsA.cVal, ThdA.phsB.instCVal, ThdA.phsB.cVal ThdA.phsC.instCVal,
ThdA.phsC.cVal, ThdA.neut.instCVal, ThdA.neut.cVal ThdA.net.instCVal,
ThdA.net.cVal
These registers contain the instantaneous and deadbanded values for current total harmonic distortion for phases A, B and C, including neutral and net values. Depending on the Power Meter module’s Volts Mode, some or all of these registers may be not available. Refer to the Power Meter module for more information.
ThdOddA.phsA.instCVal, ThdOddA.phsA.cVal,
ThdOddA.phsB.instCVal, ThdOddA.phsB.cVal, ThdOddA.phsC.instCVal, ThdOddA.phsC.cVal,
ThdOddA.neut.instCVal, ThdOddA.neut.cVal, ThdOddA.net.instCVal, ThdOddA.net.cVal
These registers contain the instantaneous and deadbanded values for current total odd harmonic distortion for phases A, B and C, including neutral and net values. Depending on the Power Meter module’s Volts Mode, some or all of these registers may be not available. Refer to the Power Meter module for more information.
ThdEvnA.phsA.instCVal,
ThdEvnA.phsA.cVal, ThdEvnA.phsB.instCVal, ThdEvnA.phsB.cVal, ThdEvnA.phsC.instCVal,
ThdEvnA.phsC.cVal, ThdEvnA.neut.instCVal, ThdEvnA.neut.cVal, ThdEvnA.net.instCVal,
ThdEvnA.net.cVal
These registers contain the instantaneous and deadbanded values for current total even harmonic distortion for phases A, B and C, including neutral and net values. Depending on the Power Meter module’s Volts Mode, some or all of these registers may be not available. Refer to the Power Meter module for more information.
ThdPhV.phsA.instCVal, ThdPhV.phsA.cVal,
ThdPhV.phsB.instCVal, ThdPhV.phsB.cVal, ThdPhV.phsC.instCVal, ThdPhV.phsC.cVal,
ThdPhV.neut.instCVal, ThdPhV.neut.cVal
These registers contain the instantaneous and deadbanded values for voltage total harmonic distortion for phases A, B and C, including neutral values. Depending on the Power Meter module’s Volts Mode, some or all of these registers may be not available. Refer to the Power Meter module for more information.
ThdOddPhV.phsA.instCVal, ThdOddPhV.phsA.cVal,
ThdOddPhV.phsB.instCVal, ThdOddPhV.phsB.cVal, ThdOddPhV.phsC.instCVal,
ThdOddPhV.phsC.cVal, ThdOddPhV.neut.instCVal, ThdOddPhV.neut.cVal
These registers contain the instantaneous and deadbanded values for voltage total odd harmonic distortion for phases A, B and C, including neutral values. Depending on the Power Meter module’s Volts Mode, some or all of these registers may be not available. Refer to the Power Meter module for more information.
ThdEvnPhV.phsA.instCVal,
ThdEvnPhV.phsA.cVal, ThdEvnPhV.phsB.instCVal, ThdEvnPhV.phsB.cVal,
ThdEvnPhV.phsC.instCVal, ThdEvnPhV.phsC.cVal, ThdEvnPhV.neut.instCVal,
ThdEvnPhV.neut.cVal
These registers contain the instantaneous and deadbanded values for voltage total even harmonic distortion for phases A, B and C, including neutral values. Depending on the Power Meter module’s Volts Mode, some or all of these registers may be not available. Refer to the Power Meter module for more information.
HCfA.phsA.instCVal, HCfA.phsA.cVal,
HCfA.phsB.instCVal, HCfA.phsB.cVal, HCfA.phsC.instCVal, HCfA.phsC.cVal,
HCfA.neut.instCVal, HCfA.neut.cVal, HCfA.net.instCVal, HCfA.net.cVal
These registers contain the instantaneous and deadbanded values for current crest factors for phases A, B and C, including neutral and net values. Depending on the Power Meter module’s Volts Mode, some or all of these registers may be not available. Refer to the Power Meter module for more information.
ThdPPV.phsAB.instCVal,
ThdPPV.phsAB.cVal, ThdPPV.phsBC.instCVal, ThdPPV.phsBC.cVal, ThdPPV.phsCA.instCVal,
ThdPPV.phsCA.cVal
These registers contain the instantaneous and deadbanded values for voltage total harmonic distortion for phases A, B and C.
ThdOddPPV.phsAB.instCVal,
ThdOddPPV.phsAB.cVal, ThdOddPPV.phsBC.instCVal, ThdOddPPV.phsBC.cVal,
ThdOddPPV.phsCA.instCVal, ThdOddPPV.phsCA.cVal
These registers contain the instantaneous and deadbanded values for voltage total odd harmonic distortion for phases A, B and C.
ThdEvnPPV.phsAB.instCVal, ThdEvnPPV.phsAB.cVal,
ThdEvnPPV.phsBC.instCVal, ThdEvnPPV.phsBC.cVal, ThdEvnPPV.phsCA.instCVal,
ThdEvnPPV.phsCA.cVal
These registers contain the instantaneous and deadbanded values for voltage total even harmonic distortion for phases A, B and C.
Event
Detailed module operation
The MHAI module inputs are linked to the Harmonics Analyzer or Harmonics Measurement modules, as shown in the following table.
MHAI Output register | ION Module Name | Harmonics Analyzer Module register | Harmonics Measurement Module register (used if present) |
|---|---|---|---|
Hkf.phsA/B/C/neut/net | I1/I2/I3/I4/I5 | K Factor | K Factor |
ThdA.phsA/B/C/neut/net1 | I1/I2/I3/I4/I5 | Total HD | Total HD |
ThdOddA.phsA/B/C/neut/net1 | I1/I2/I3/I4/I5 | Tot OddHD | Total Odd HD |
ThdEvnA.phsA/B/C/neut/net1 | I1/I2/I3/I4/I5 | Tot EvenHD | Total Even HD |
ThdPhV.phsA/B/C/neut1 | V1/V2/V3/V4 | Total HD | Total HD |
ThdOddPhV.phsA/B/C/neut1 | V1/V2/V3/V4 | Tot OddHD | Total Odd HD |
ThdEvnPhV.phsA/B/C/neut1 | V1/V2/V3/V4 | Tot EvenHD | Total Even HD |
HCfA.phsA/B/C/neut/net | I1/I2/I3/I4/I5 | Crest Factor | Crest Factor |
ThdPPV.phsAB/BC/CA | V1/V2/V3 | Total HD | Total HD |
ThdOddPPV.phsAB/BC/CA | V1/V2/V3 | Tot OddHD | Total Odd HD |
ThdEvnPPV.phsAB/BC/CA | V1/V2/V3 | Tot EvenHD | Total Even HD |
| 1 Neutral and net values are only available on Harmonics Analyzer modules. | |||
The input registers are used by the MHAI module to access all the harmonics output registers on the connected Harmonics Analzyer or Harmonics Measurement module and populate IEC 61850 arrays with the harmonics values, see “IEC 61850 Harmonic arrays and sources”. These arrays are only accessible from IEC 61850.
IEC 61850 Harmonic arrays and sources
The harmonics arrays are populated from the appropriate module based on whether the meter is configured to Wye volts mode (line to neutral voltage) or Delta volts mode (line to line voltage). The table below defines the population for a device that supports up to the 50th harmonic.
NOTE: The maximum harmonic varies depending on your device and firmware version. Refer to your device’s documentation for the maximum supported harmonic.
| Volts mode | IEC 61850 Harmonic array | Harmonics Analyzer Module registers | Harmonics Measurement Module register (used if present) |
|---|---|---|---|
| Wye and Delta |
HA.phsA(1-50).mag HA.phsB(1-50).mag HA.phsC(1-50).mag HA.neut(1-50).mag1 HA.net(1-50).mag1 |
HD1 - HD50 | Magnitude 1 - Magnitude 50 |
| Wye and Delta |
HA.phsA(1-50).ang HA.phsB(1-50).ang HA.phsC(1-50).ang HA.neut(1-50).ang1 HA.net(1-50).ang1 |
HD1 - HD50 | Phase 1 - Phase 50 |
| Wye |
HPhV.phsA(1-50).mag HPhV.phsB(1-50).mag HPhV.phsC(1-50).mag HPhV.neut(1-50).mag1 |
HD1 - HD50 | Magnitude 1 - Magnitude 50 |
| Wye |
HPhV.phsA(1-50).ang HPhV.phsB(1-50).ang HPhV.phsC(1-50).ang HPhV.neut(1-50).ang1 |
HD1 - HD50 | Phase 1 - Phase 50 |
| Delta |
HPPV.phsAB(1-50).mag HPPV.phsBC(1-50).mag HPPV.phsCA(1-50).mag |
HD1 - HD50 | Magnitude 1 - Magnitude 50 |
| Delta |
HPPV.phsAB(1-50).ang HPPV.phsBC(1-50).ang HPPV.phsCA(1-50).ang |
HD1 - HD50 | Phase 1 - Phase 50 |
| 1 Neutral and net values are taken from the Harmonics Analyzer module if present. | |||