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 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) 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) 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 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) 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) 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) All Mavowatt 240 capabilities, plus: High speed transient acquisition from 1 μs Advanced Energy Monitoring according to IEEE 1459
	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) 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) 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 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

Fault finding - overview mobile devices

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