• Gossen Metrawatt
  • Camille Bauer

DSPQ - Demand Side Power Quality

DSPQ – Demand Side Power Quality - Recognising problems before they occur

1. Description of correlations, objectives and limits

The fi rst step involves an analysis of the internal power grid infrastructure for all the plant components, zones, energy supplies and consumers in focus.

The plan to be implemented contains participants, time frame, resources, etc.

2. Evaluation of the current PQ situation

In a second step, the essential loads and their eff ects on the in-house mains are evaluated (e.g. PQ simulation). In reference to the defi ned targets, we determine which data has to be acquired at which point in the existing system in order to gain the required insights. This forms the basis for the measuring equipment required. The already existing measuring infrastructure is also taken into consideration and included wherever possible.

3. Definition of an action plan to improve the PQ situation

On basis of the previous analysis, appropriate measures are proposed to achieve the DSPQ targets described (DSPQ: Demand Side Power Quality). A detailed action plan needs to be defi ned. This includes all aspects of the planned measuring campaign – i.e. measuring instruments and their installation, technical data acquisition, combination and consolidation as well as planning of the time frame, the internal communication and cyclical verifi cation of the acquisition system in this phase.

4. Implementation of the action plan to establish the PQ measuring system

The next step comprises the detailed implementation of the developed and approved action plan. This includes, in particular, the physical installation of all components needed to acquire the required data. The DSPQ measuring system is constructed and commissioned.

5. Use of the measuring system and evaluation of measured data

The measures included in the action plan have been implemented in line with their priority and the eff ects can be verifi ed by the DSPQ measuring system. Data is systematically acquired, stored and is available for continuous evaluation. This enables the constant assessment of the PQ situation. Improvements over time are shown.

6. Maintenance of the measuring system

In a last step, the DSPQ measuring system is checked in order to ensure the sustaining operation of the future measuring infrastructure. Lasting, safe and accurate measuring data acquisition is important in this respect. Relevant measures are discussed with the customer and described in an action plan (e.g. for maintenance and upkeep). 

24/7 - stationary measurement of power quality

Measurement of all electrical variables incl. event recording and disturbance recorder function
SINEAX AM-REIHE (AC)

SINEAX AM SERIES (AC)

Compact devices for measurement and monitoring in the power system
  • Harmonic analysis according to IEC 61000-4-7
  • 1500 items of information concerning energy consumption, grid condition and power quality
  • Panel installation 96 x 96 mm and 144 x 144mm
  • Disturbance recorder: Voltage events acc. IEC 61000-4-30
SINEAX DM5000 (AC)

SINEAX DM5000 (AC)

Compact device to monitor all aspects of power distribution

  • Harmonic analysis according to IEC 61000-4-7
  • Grid condition monitoring: Class 0.1 (U/I), Class 0.2 (P/Q/S)
  • Top hat rail device
  • Disturbance recorder: Voltage events acc. IEC 61000-4-30
APLUS (AC)

APLUS (AC)

The system for power system analysis

  • Comprehensive grid analysis
  • Long-term data storage with event protocols
  • Panel installation 96 x 96 mm and top hat rail device
Measuring instruments for power quality monitoring according to Class A, metrologically certified
LINAX PQ-REIHE (AC)

LINAX PQ SERIES (AC)

Compact devices for power quality monitoring in electrical grids
  • Certifi ed power quality analysis in Class A, according to IEC 61000-4-30 Ed. 3
  • Data exchange for power quality data: PQDIF
  • PQ conformity reports via website possible without any external software

Mobile measurement of power quality

Mobile Geräte
MAVOWATT 230 (AC/DC)

MAVOWATT 230 (AC/DC)

Three-phase energy and grid disturbance analysers
  • Power quality analysis in Class A according to IEC 61000-4-30 Ed. 3
  • Transient acquisition from 32 / 40 μs (50 / 60 Hz)
  • Acquisition harmonics and interharmonics U (127), I (63)
MAVOWATT 240 (AC/DC)

MAVOWATT 240 (AC/DC)

All Mavowatt 230 capabilities, plus:

  • WiFi communication
  • Answer Modules for automatic power quality event directivity reporting
  • 10 000 cycle pre / post cycle recording
MAVOWATT 270 (AC/DC)

MAVOWATT 270 (AC/DC)

All Mavowatt 240 capabilities, plus:

  • High speed transient acquisition from 1 μs
  • Advanced Energy Monitoring according to IEEE 1459
MAVOWATT 270-400 (AC/DC)

MAVOWATT 270-400 (AC/DC)

All Mavowatt 240 capabilities, plus:
  • High speed transient acquisition from 1 μs
  • Advanced Energy Monitoring according to IEEE 1459
  • 400 Hz monitoring
MAVOWATT 30 (AC/DC)

MAVOWATT 30 (AC/DC)

8-channel grid disturbance analyser

  • Power quality analysis in Class A according to IEC 61000-4-30 Ed. 2
  • Transient acquisition from 80 μs
  • Lightweight with only approx. 1.9 kg
LINAX PQ5000 MOBILE (AC)

LINAX PQ5000 MOBILE (AC)

Mobile device to monitor power quality in electrical grids

  • Power quality analysis in Class A, according to IEC 61000-4-30 Ed. 3 (metrologically certified)
  • PQ conformity report via website
  • User LAN / WLAN interface via PC, laptop, tablet and smartphone
METRAHIT ENERGY

METRAHIT ENERGY

One-phase energy and grid disturbance analyser (TRMS power multimeter)

  • Grid quality analysis to acquire high / low voltage, transients
  • Harmonics analysis up to the 15th harmonic
  • Simultaneous measurement of current and voltage including the calculation of active / reactive power and energy


24/7 - Overview devices stationary measurement

PQ-Device differentiation SINEAX
AM Series
SINEAX
DM5000
APLUS LINAX
PQ Series
Design 96 x 96 / 144 x 144 DIN Hutschiene 96 x 96 DIN Hut./ 144 x 144
Display/operation ▪ / Buttons ▪ / Buttons ▪ / Buttons ▪ / Buttons
Measuring
IEC 61000-4-30 Class A - - - Ed. 3
Sampling rate (bandwidth) 18 kHz (4,5 kHz) 18 kHz (4,5 kHz) 6,4 kHz 18 kHz (4,5 kHz)
Samples per period 50 / 60 Hz 360 / 300 360 / 300 128 / 128 360 / 300
Transientrecord Waveform Waveform Waveform Waveform
RCM -
Energy meter
Conformity standards - - - EN 50160
IEC 61000-2-2
IEC 61000-2-4
IEC 61000-2-12
IEEE 519
GB/T
Accuracy U / I [%] 0,1 / 0,1 0,1 / 0,1 0,1 / 0,1 0,1
Accuracy energy meter 0,2S / 0,5S 0,2S 0,5S 0,2S
Voltage measurement
Overvoltage category 600 V CAT III 600 V CAT III 600 V CAT III 600 V CAT III
Number of channels 4 4 3 4
Measuring range LN / LL 480 V / 832 V 480 V / 832 V 480 V / 832 V 480 V / 832 V
Power frequency 42 … 69,5 Hz 42 … 69,5 Hz 45 … 65 Hz 42 … 69,5 Hz
Current measurement
Memory size CT CT CT / Rogowski CT
Category 300 V CAT III 300 V CAT III 300 V CAT III 300 V CAT III
Number of channels 4 4 3 4
Measuring range (device) In / Imax 5 A / 7.5 A 5 A / 7.5 A 5 A / 7.5 A 5 A / 7.5 A
Recording/protocol
Speichergrösse 16GB 16GB 8GB 16GB
PQDIF - - - via Gerät
CSV via Webbrowser via Webbrowser via Software via webbrowser
PDF conformity report - - - via browser/software
Power supply
Supply 100/230 V AC/DC
24/48 V DC
100/230 V AC/DC
24/48 V DC
100/230 V AC/DC
24…230 V DC
100/230 V AC/DC
24/48 V DC
Battery power reserve or UPS 5 x 3 min 5 x 3 min - 5 x 3 min
Communication
Interface Ethernet
RS485
Ethernet
RS485
Ethernet
RS485
Ethernet
RS485
Protocol Modbus
Profinet
IEC 61850
Modbus
Profinet
IEC 61850
Modbus
Profibus DP
Modbus
Profinet
IEC 61850


Fault finding - overview mobile devices

MAVOWATT 230 MAVOWATT 240 MAVOWATT 270 MAVOWATT
270-400
MAVOWATT
30
METRAHIT
ENERGY
LINAX PQ5000
MOBILE
Handheld Handheld Handheld Handheld Handheld Handheld Handheld
▪ / Touch ▪ / Touch ▪ / Touch ▪ / Touch ▪ / Touch ▪ / Buttons – / Buttons
             
Ed. 2 Ed. 2 Ed. 2 Ed. 2 Ed. 2 - Ed. 3
25,6 kHz (7 kHz) 25,6 kHz (7 kHz) 25,6 kHz (7 kHz) 25,6 kHz (9 kHz) 12,8 kHz 2 kHz (100 kHz) 18 kHz (4,5 kHz)
512 / 427 512 / 427 512 / 427 512 / 427
(400 Hz: 32)
256 / 213 40 / 33 360 / 300
>32μs >32μs >1μs >1μs >80μs 0,5 … 5μs -
- - - - - - -
EN 50160
IEEE 519
EN 50160
IEEE 519
EN 50160
IEEE 519
EN 50160
IEEE 519
EN 50160
IEEE 519
- EN 50160
IEC 61000-2-2
IEC 61000-2-4
IEC 61000-2-12
IEEE 519
GB/T
0,1±0,05FS 0,1±0,05FS 0,1±0,05FS 0,1±0,05FS 0,1±0,05FS 0,2+30D / 0,5+25D 0,1
0,2S 0,2S 0,2S 0,2S - 0,4+20D 0,2S
             
1000 V CAT III 1000 V CAT III 1000 V CAT III 1000 V CAT III 600 V CAT III 600 V CAT III 600 V CAT III
4 4 4 4 4 1 4
600 V / 1000 V 600 V / 1000 V 600 V / 1000 V 600 V / 1000 V 600 V / 1000 V 600 V 480 V / 832 V
16 … 25 Hz
42,5 … 65 Hz
16 … 25 Hz
42,5 … 65 Hz
16 … 25 Hz
42,5 … 65 Hz
42,5 … 65 Hz
380 … 420 Hz
15 … 20 Hz
40 … 3000 Hz
DC
15 … 100 Hz
50 Hz / 60 Hz
             
Rogowski/Zange Rogowski/Zange Rogowski/Zange Rogowski/Zange Rogowski/Zange direkt, Zange Rogowski/Zange
600 V CAT IV 600 V CAT IV 600 V CAT IV 600 V CAT IV 300 V CAT III 600 V CAT III / 300
V CAT IV
600 V CAT IV /
600 V CAT III
4 4 4 4 4 1 4
- - - - - 10 A -
             
4GB 4GB 4GB 4GB 4GB 300 000 Werte 4GB
via software via software via software via software via software - via device
via software via software via software via software via software via software via webbrowser
via software via software via software via software via software via software via browser/software
             
100/240 V AC
12 V DC
100/240 V AC
12 V DC
100/240 V AC
12 V DC
100/240 V AC
12 V DC
100/240 V AC
12 V DC
2 x 1,5 V Mignon
Steckernetzteil
100/240 V AC
3h 3h 2,5h 2,5h 3h 120 h Batterie -
- - - - - - -
             
Ethernet
Bluetooth
Ethernet
Bluetooth
USB
WiFi
Ethernet
Bluetooth
USB
WiFi
Ethernet
Bluetooth
USB
WiFi
Ethernet
Bluetooth
USB
WiFi
IR Ethernet
WiFi
Modbus Modbus WiFi Modbus Modbus device-specific Modbus

 

About 80 % of all PQ disturbances are originating inside the facilities after the PCC (Point of Common Coupling) and not by external sources.

SICHERUNG DER ELEKTRISCHEN ENERGIE-VERSORGUNG

Sicherung der elektrischen Energieversorgung

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