Here is more detailed presentation about Iskra solution for Power Quality.

1. Power Quality
Management
Mar. 2015

2. Why measure Power Quality?
Increase of use of power electronics
● frequency inverters
● switching power supplies
● non-linear loads, modern lightning...
Increase of unbalanced and non-linear loads like large
furnaces and rectifiers
Liberalization of energy markets
● More demanding power regulation due to increase of grid
connected renewable energy sources
● Reduction of infrastructure investments
Reasons for increasing requirements for Power Quality

3. Bad Power Quality consequences
● Business normal operation can be interrupted
causing significant economic damage
● Power blackouts in wider residential and business
areas
● Interconnecting (exporting/importing) different
distribution power grids may not be possible
Economical aspects:
● Malfunction of domestic appliances, medical equipment,
laboratory apparatus...
● Burn-out of heavy industrial motors due to voltage
unbalance
● Ageing and destruction of power factor correction
capacitors due to harmonic currents
● Stopping and/or resetting of control systems that are
dependent on a computer due to voltage interruptions
Technical aspects

4. How do we measure Power Quality?
● Power Quality can not be measured by standard measuring devices used for
voltage/current/power monitoring
● Power Quality analysis is covered by two sets of standards which define:
Measurement methods for PQ parameters
● They are defined with IEC 61000-4-30 standard and sub-standards for harmonics
and flicker
● Class A type of instrument is also defined by this standard

5. Class A PQ Analyser MC784/MC774
Class A measuring accuracy according to EN61000-4-30
Evaluation of power quality in compliance with EN 50160

6. Important features
● Power Quality analysis according to EN50160 with automatic
report generation
● High accuracy (0.1%) as required within EN61000-4-30 Class A
● Measurement of 4 Voltages and 4 Currents with 32 kHz sampling
time
● Waveform and transient recorder with programmable sampling
time (> 600 samples / period), pre-trigger and post-trigger time
● Automatic measuring range up to 1000 VRMS and 12.5 A direct
connection
● Internal memory (up to 8GB) for recording all measured
parameters, waveforms, alarms, PQ reports and time-stamped
details about anomalies.
● Serial, USB and Ethernet communication with support for
MODBUS, DNP3 and IEC61850* protocol.
● Comprehensive energy measurement feature (4 quadrant energy
measurement, 4 counters, up to 4 tariffs, tariff clock, pulse
outputs...)
● Wide range of Input and Output modules
● Pqdiff and Comtrade data format support
* Availabe by the end of 2015

7. Advantages
MC784/774 combines
● functionality of PQ analyser
● multifunctional measuring device
● additional alarm functionality for control and supervision
operations
Wide range of input and output modules
● monitoring other physical parameters inside transformer
station
● controlling switches and other actuators…
Setting MC784/774
● user friendly and intuitive setting software MiQen
● software features and instantaneous help for all settings are
available in different languages
Real Time Synchronisation sources
● NTP, GPS, IRIG-B

8. Power Quality System

9. MiSMART – Introduction
WEB based application comprised
from
• Push Data Collector
• Database
• Client
Operating system independent
software
MiSMART vs SCADA
• Not real time (except alarms)
• Data lossless operation
• Scalable and user-friendly
• SMS and e-mail alarm notification
Standard SQL database
• It can be used with other software
solutions

10. MiSMART – key functionalities
MiSMART Configuration Tools
• Device data configuration
• Setting up the system grid structure
• User management
MiSMART Data Monitor
• Measurement monitoring
• Alarm monitor
• Basic statistical functions
• EN50160 power quality support
• Table and chart data reviewing
• Exporting data into Excel
• Filtering relevant data from the grid
• Data comparison from different meter
points
• Virtual metering points
• …

11. MiSMART – benefits
• Analysis of power quality in the grid for later corrective measures,
• Cost savings due to faster response to outages for better maintenance,
• Energy savings after corrective measures have been implemented,
• Historical data for better planning,
• Proactive equipment protection,
• More reliable grid operation,
• Better control of power theft and power losses in the network – this will
especially be obvious when more sites are equipped with PQ analysers.

12. Facts about the company
• Utility company operating MV and
LV infrastructure
• 87000 customers
• 1333 MV/LV transformer stations
• 14 HV/LV transformer stations
• WiMAX, GPRS & ethernet
communication
• Project in operation for 2 years
Business case #1 – Elektro Gorenjska

13. Communication infrastructure:
• WiMAX, GPRS, Ethernet
• over 280 locations with (and growing)
Measurements:
• Up to 60 measurements from each device
• Sampling time from 1 to 10 minutes
Alarms:
• voltage interruption
• voltage high/low
• frequency high/low
• current high
Additional monitored signals:
• Temperature – analogue signal
• Intrusion detection – digital signal
Business case #1 – technical facts about the project

14. Voltage profile on several meter points
Business case #1 – application insight

15. • Remote and centralized measurement monitoring (Energy, active power,
reactive power, currents, voltages, phase angles, maximal period values,
minimal period values)
• Remote and centralized alarm monitoring in real time
• PQ parameter monitoring according to EN50160 on 19 locations
• Real time information on the operation of installed equipment
• Excel and PQDIF data export capability for regulator reporting
• Better and faster maintenance planning according to historic data offered
by the system
• Quicker response to failures as well as failure analysis
• Better supervision over energy losses within the power grid by comparing
consumption data with the one of the billing system
• SCADA system integration over the IEC 60870-5-104 protocol
Business case #1 – key user benefits