MSEDCL - testing -training PPT on PQ.PDF

PQM training in MSEDCL

1. Introduction to Power Quality Standards and Compliance
What and Why?
Jayant Sharma –Application Engineering

2. © Secure Meters Ltd
Power quality standards and regulations
IEC 61000-4-30
Measurement
methods for PQ
IEC 62586-2
Functional test
and limit for PQI
EN:50160
Voltage supply
requirement
IEEE 519-2014
Harmonic emission
limits guideline
PQ standard PQ Regulation
PQ guideline
Country specific
regulations
e.gIS:17036, NRS,
NVE etc

3. © Secure Meters Ltd
Reference standards:
Broadly, there are two ways of judging the Power Quality of any given network (at PCC
level):
1.Requirements for Harmonic Control in Power Systems
•
IEEE 519
2.Distribution System Supply Voltage Quality
•
EN 50160
•
IS 17036 (Country specific)
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4. © Secure Meters Ltd
IEEE 519 –2014:
•
The limits in this recommended practice are intended for application at a point
of common coupling (PCC) between the system owner or operator and a user,
where the PCC is usually taken as the point in the power system closest to
the user where the system owner or operator could offer service to another
user.
•
Frequently, for service to industrial users (i.e., manufacturing plants) via a
dedicated service transformer, the PCC is at the HV side of the transformer.
•
For commercial users (office parks, shopping malls, etc.) supplied through a
common service transformer, the PCC is commonly at the LV side of the
service transformer.
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5. © Secure Meters Ltd
IEEE 519 –2014:
Cl. 4: Harmonic measurements
Cl. 4.1: Measurement window width
The width of the measurement window used by digital instruments employing
Discrete Fourier Transform techniques should be 10 cycles for 50 Hz power systems.
Cl. 4.2: Very short time harmonic measurements
Very short time harmonic values are assessed over a 3-second interval based on an
aggregation of 15 consecutive 10 cycle windows for 50 Hz power systems.
Cl. 4.3: Short time harmonic measurements
Short time harmonic values are assessed over a 10-minute interval based on an
aggregation of 200 consecutive very short time values for a specific frequency
component.
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6. © Secure Meters Ltd
IEEE 519 –2014:
Cl. 4: Harmonic measurements
For the purposes of assessing harmonic levels for comparison with the
recommended limits, any instrument used should comply with the specifications
of IEC 61000-4-30 (PQ measurement method) and IEC 61000-4-7 (EMC)
6
1
st
: RMS 150 cycles2nd: RMS 150 cycles
……….
200
IntervalsU
RMS
Σ
10 Mins, -/+ 20 mS
1
st
: 10 cycles2nd: 10 cycles3rd: 10 cycles
15th:
10 cycles
RMS 150 cycles
i.e. 3 Seconds for 50 Hz system
……………………
Basic Unit: 10 cycles
Integration time
IEC61000-4-30 measurement method

7. © Secure Meters Ltd
IEEE 519 –2014:
Cl. 4: Harmonic measurements
Cl. 4.4 Statistical evaluation
•
Very short and short time harmonic values should be accumulated over periods of
one day and one week, respectively.
•
For very short time harmonic measurements, the 99th percentile value (i.e., the
value that is exceeded for 1% of the measurement period) should be calculated for
each 24-hour period for comparison with the recommend limits.
•
For short time harmonic measurements, the 95th and 99th percentile values (i.e.,
those values that are exceeded for 5% and 1% of the measurement period) should
be calculated for each 7-day period for comparison with the recommended limits.
These statistics should be used for both voltage and current harmonics with the
exception that the 99th percentile short time value is not recommended for use
with voltage harmonics.
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8. © Secure Meters Ltd
IEEE 519 -2014:
Cl. 5.1: Recommended harmonic voltage limits
At the PCC, system owners or operators should limit line-to-neutral voltage harmonics as follows:
•
Daily 99th percentile very short time (3 s) values should be less than 1.5 times the values given in
Table 1.
•
Weekly 95th percentile short time (10 min) values should be less than the values given in Table 1.
•
All values should be in percent of the rated power frequency voltage at the PCC. Table 1 applies to
voltage harmonics whose frequencies are integer multiples of the power frequency.
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9. © Secure Meters Ltd
IEEE 519 –2014:
Cl. 5.2: Recommended current distortion limits
At the PCC, users should limit their harmonic currents as follows:
•
Daily 99th percentile very short time (3 s) harmonic currents should be less than 2.0 times the
values given in Table 2
•
Weekly 99th percentile short time (10 min) harmonic currents should be less than 1.5 times the
values given in Table 2.
•
Weekly 95th percentile short time (10 min) harmonic currents should be less than the values given
in Table 2.
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10. © Secure Meters Ltd
IEEE 519 –2014:
Cl. 5.5: Recommendations for increasing harmonic current limits
It is recommended that the values given in Table 2 be increased by a multiplying
factor when actions are taken by a user to reduce lower-order harmonics.
The multipliers given in the second column of Table 5 are applicable when steps
are taken to reduce the harmonic orders given in the first column.
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11. © Secure Meters Ltd
IS 17036 –2018:
This Standard specify the main characteristics of the voltage at network user’s supply
terminals in distribution system.
The characteristics of the supply voltage considered by this standard are:
a) Frequency;
b) Magnitude;
c) Waveform; and
d) Symmetry of the line voltages.
References:
EN 50160:Voltage characteristics of electricity supplied by public distribution systems
IEC 61000-4-30: Electromagnetic compatibility (EMC) —Part 4-30: Testing and
measurement techniques —Power quality measurement methods
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IS 17036: Limits of Voltage Harmonics
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EN 50160: Voltage characteristics of electricity supplied by
public distribution systems(European Standard)
The object of this European Standard is to define, describe and specify the
characteristics of the supply voltage concerning:
a) frequency;
b) magnitude;
c) waveform;
d) symmetry of the line voltages.
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EN 50160: Limits of Voltage Harmonics:
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CEA guideline:
Cl. 1.4: Summary of distribution network planning criteria
Sec. 18: The power quality should be maintained as per IS 17036 ( Distribution System
Supply Voltage Quality).
Sec. 33: The suggested total harmonic voltage distortion and individual harmonic voltage
distortion at point of common coupling shall be in accordance with the CEA Regulations,
as amended from time to time, which stipulates individual harmonic voltage distortion in
accordance with IEEE 519 -2014 standards.
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16. © Secure Meters Ltd
CEA guideline:
Cl. 7.5 Safety guidelines for roof -top solar
Sec. 4: The limits of injection of current harmonics at the point of common coupling by the user,
method of harmonic measurement and other such matters, shall be in accordance with the IEEE
519-2014 standards, as amended, from time to time.
Sec. 5: The measuring and metering of harmonics shall be a continuous process with power
quality meters complying with the provisions of IEC 61000-4-30 Class A.
Sec. 7: The applicant seeking connectivity at 11 kV or above shall install power quality
meters and share the recorded data thereof with the distribution licensee with such periodicity
as may be specified by the appropriate Electricity Regulatory Commission.
Sec. 8: In addition to harmonics, periodic measurement of other power quality parameters such
as voltage sag, swell, flicker, disruptions shall be done by the distribution licensee as per
relevant IEC standard and the reports thereof shall be shared with the consumer.
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17. © Secure Meters Ltd
MERC: Draft Regulations, 2020
“Designated Consumers” means the Consumers using or engaged in any of the
following process i.e. Arc Furnace, Induction Furnace, Iron & Steel, Aluminium, Textile,
Paper & Pulp, Chlor-Alkali, Petro-Chemical, Cement, Pharmaceuticals IT/ITES, Airports,
Malls, Hotels, Banking, Railways/Metros or as may be specified by the Commission from
time to time and connected at a supply voltage of 11 kV & above;
Cl. 22.13: The limits of current harmonics injected by the Designated Consumer(s) shall be
in accordance with IEEE 519-2014, as modified from time to time.
Cl. 22.9:The Supply voltage swell limits shall be specified by the Commission separately
as and when the same are specified by IS 17036.
Cl. 22.11: The limits of each individual Supply voltage harmonics and voltage THD by the
distribution licensee shall be in accordance with IS 17036,as modified from time to time.
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18. © Secure Meters Ltd
MERC: Cl. 22-Quality of Supply
The characteristics of power quality of electrical supply considered in this Regulations
to be controlled by Distribution Licensee are:
i.Supply voltage variations
ii.Supply voltage flicker
iii.Supply voltage unbalance
iv.Supply voltage dips and swells
v.Supply voltage individual harmonics and voltage THD
vi.Supply Interruptions
Cl. 22.4: The characteristic of power quality of electrical supply considered in these
Regulations to be controlled by Designated Consumer(s) is:
•
Current individual harmonics and current TDD
18

19. Power Quality and solution offering
What and Why?

20. © Secure Meters Ltd
Power Quality:
20
Criteria:
•Voltage magnitude
•Frequency
•Wave shape
It is a measure of ideal power supply and refers to maintaining a near sinusoidal nominal voltage to a bus at rated
magnitude and rated frequency, uninterruptedly.
Attributes:
•Supply availability –24x7
•Amplitude –As per nominal
•Waveform –Sinusoidal
•Frequency –As per rated 50/60 Hz
•Angular separation –120
0
(3 phase system)

21. © Secure Meters Ltd
Power reliability:
Degree of reliability is measured by

Frequency of interruption

Duration of interruption
There are mainly three most common indices defined in IEEE 1366
•
SAIFI –System average interruption frequency index ( = )
How often the average customer experiences an interruption
•
SAIDI –System average interruption duration index ( = )
The total number of minutes of interruption the average customer experiences
•
CAIDI –Customer average interruption duration (= = )
The average time required to restore service
*CI= Customers Interrupted * CS= Customers Served * CMI= Customer Minutes Interrupted
21
CI
CS
CMI
CS
CMI
CI
SAIDI
SAIFI

22. © Secure Meters Ltd
Voltage interruption:
(As per IS 17036)
22
Interruption
duration
Description:
For poly-phase systems, an interruption occurs when the voltage falls below 5%
of the reference voltage on all phases, otherwise, the event is to be considered a
dip.
Accidental interruption, caused by permanent or transient faults, mostly related
to external events, equipment failures or interference are classified as:
1.A long interruption (longer than 3 min),
2.A short interruption (uptoand including 3 min),
Causes:
•Faults
•Shut downs
Consequences:
•Industrial process shutdown
•Corruption of valuable data due to loss of power to the equipment

23. © Secure Meters Ltd
Voltage Sag and under Voltage:
23
Definition:
A decrease of the normal voltage level between 5% and 90% of the nominal rmsvoltage at the
power frequency, for durations of 0.5 cycle to 1 minute.
If the sag continue to remain for duration more than 1 min, it is denoted as under Voltage
For poly-phase events, a dip begins when one voltage falls below the dip start threshold and
ends when all voltages are equal to or above the dip end threshold.Causes:
•Faults on the transmission or distribution network (most of the times on parallel feeders).
•Faults in consumer’s installation. Connection of heavy loads and start-up of large motors.
•Over loading
•Loss of transmission line
Consequences:
•Malfunction of information technology equipment, namely microprocessor-based control systems (PCs,
PLCs, ASDs, etc) that may lead to a process stoppage.
•Tripping of contactors and electromechanical relays. Disconnection and loss of efficiency in electric
rotating machines.
•Motors heat up
•Motors fail prematurely
•Batteries do not charge fully
•Lights reduce in intensity
Sag duration
Sag

24. © Secure Meters Ltd
Voltage Swell and over Voltage:
24
Description:
A increase
≥
110% of nominal voltage level of the nominal rmsvoltage at the power
frequency, for durations of 0.5 cycle to 1 minute
If the swell continue to remain for duration more than 1 min, it is denoted as over Voltage.
Causes:
•Start/stop of heavy loads
•Switching capacitors
•badly regulated transformers (wrong tap setting)
•Light load condition in HV system
Consequences:
•Data loss
•flickering of lighting and screens
•stoppage or damage of sensitive equipment, if the voltage values are too high
•Incandescent lamps will fail
•Motors overheating
Swell duration
Swell

25. © Secure Meters Ltd
Rapid Voltage change:
25
Description:
Voltage changes in the range of 90% -110% of nominal voltage rating between
two steady state conditions.
The voltage during a rapid voltage change shall not exceed the voltage dip
and/or voltage swell threshold as it would otherwise be considered as a voltage
sag or swellCauses:
•Switching in electrical system
•Use of auto-welding machine (automotive industry)
•Use of induction furnaces
Consequences:
Electrically, the consequences of RVCs are usually small. However, like flicker
they are perceived as irritating as these cause lights to flash.

26. © Secure Meters Ltd
Flicker:
26
Description:
Impression of unsteadiness of visual sensation induced by a light stimulus
whose luminance or spectral distribution fluctuates with time.
Causes:
•use of large loads having rapidly fluctuating active and reactive power demand (eg
Arc furnace, Adjustable speed drive)
•Welders, Car scrap plants
Consequences:
•The effects can range from disturbance to epileptic attacks of photosensitive
persons.
•Reduced productivity

27. © Secure Meters Ltd
Transient Voltages / current:
27
Description:
A sudden increase or decrease in voltage/current for short duration
•impulse (sudden +ve/ -vepeak events)
•oscillatory (very rapid oscillations)Causes:
•Lightning stroke
•Switching of equipment and power lines on the utility’s power system
•Static discharge and arcing
Consequences:
•Electronic devices may operate erratically
•Transient activity causes early failure of all types of lights
•Integrated circuits may fail immediately or fail prematurely
•Damage Insulation

28. © Secure Meters Ltd
Supply Voltage Unbalance:
28
Description:
Voltage deviation of each phase from the avg. voltage of all three phases and/ or
angular separation of three voltages is not 120
0
Causes:
•Asymmetric faults,
•Non-transposed conductors,
•Uneven load distribution (induction furnaces, traction loads).
•Capacitor banks not operating properly on one phase than another
Consequences:
A voltage unbalance greater than 2 percent will cause motors and transformers
to damage from overheat

29. © Secure Meters Ltd
Harmonics:
29
Sinusoidal voltages or currents having frequencies that are integer multiples of the
fundamental frequency at which the power system is designed to operate are termed
as Harmonics.
The non-sinusoidal shape corresponds to the sum of different sine waves with
different magnitudes and phase angles, having frequencies that are multiples of the
system frequency.
Harmonics always originate as current harmonics and voltage harmonics are the
results of current harmonics.
Causes:
•Arc furnaces, welding machines, rectifiers, and DC brush motors.
•All non-linear loads, such as power electronics equipment including ASDs
(Adjustable Speed Drive), switched mode power supplies, data processing
equipment, high efficiency lighting.

30. © Secure Meters Ltd
De-mystifying current harmonics:
30
1.Fundamental frequency waveform
2.Second order harmonic
3.Third order harmonic
4.Resultant waveform
Current waveform as sum of fundamental
frequency component and its multiples
Higher the system impedance, lower will be the short circuit capacity and vice versa
Current harmonics increase the rmscurrent flowing in the circuit and thereby, increase
the power losses.
Current harmonics affect the entire distribution all the way down to the loads. They may
cause increased eddy current and hysteresis losses in motor and transformers resulting in
over-heating, overloading in neutral conductors, nuisance tripping of circuit breakers,
over-stressing of power factor correction capacitors, interference with communication
etc. They can even lead to over-heating and saturation of reactors.

31. © Secure Meters Ltd
De-mystifying voltage harmonics:
31
V
n
= n
th
harmonic voltage
I
n
= n
th
harmonic current
Z
n
= Impedance at n
th
harmonic
V
Thd
= Voltage Total Harmonic Distortion
At load, V
n
= I
n
x (Z
Cn
+ Z
Tn
+ Z
Gn
)
At transformer, V
n
= I
n
x (Z
Tn
+ Z
Gn
)
At grid, V
n
= I
n
x (Z
Gn
)
Z
Cn= Impedance of cable at n
th
harmonic
Z
Tn= Impedance of Transformer at n
th
harmonic
Z
Gn= Impedance of Grid at n
th
harmonic
The current harmonics
(distorted waveform)
flow through system
impedance
(source and line impedances)
and cause harmonic voltage
drop across the impedances. This will distort the supply voltage
waveform. Thus voltage harmonics are generated.
Voltage harmonics affect the entire system irrespective of the
type of load.
They affect sensitive equipment throughout the facility like those
that work on zero-voltage crossing as they introduce voltage distortions.
Grid impedances are very low and hence, the harmonic voltage
distortions are also low there. However, they may be unacceptably
higher on the load side as they are subjected to full system
impedance there. Hence, it becomes important where the
harmonic measurements are done.
*In critical applications like hospitals and airports, the limits are more stringent (less than 3% V
THD
)

32. © Secure Meters Ltd
Harmonics:
32
Classification2
nd
3
rd
4
th
5
th
6
th
7
th
8
th
9
th
50 Hz 100150200250300350400450
Sequence -ve 0 +ve-ve0+ve-ve0
Effect of harmonics:
(+ve) Sequence:
Creates forward rotating
magnetic field
Effect on power
distribution system:
Heating
(-ve) Sequence:
Creates reverse rotating
magnetic field
Effect on power
distribution system:
Heating
Zero Sequence:
None
Effect on power
distribution system:
Heating, creates
current in neutral of
3P4W system

33. © Secure Meters Ltd
TriplenHarmonic:
3
rd
multiple of fundamental frequency
33

34. © Secure Meters Ltd
THD –Total Harmonic Distortion:
34
TDD –Total Demand Distortion:
THDis defined as the ratio of RMS value of all
harmonics to the value at fundamental frequency.
THD typically refers to instantaneous measurement of
harmonic distortion at an individual piece of
equipment or group of loads, based on the actual
fundamental current that is flowing during the
measurement.
TDD is defined as total root-sum-square harmonic
current distortion, in percent of the maximum demand
load current (15 or 30-minute demand).
At the full load THD(I)=TDD(I). SoTDD gives us better insight about how big impact of harmonic distortion in our system. For
example we could have very high THD but the load of the system is low. In this case the impact on the system is also low.

35. © Secure Meters Ltd
Non-linear load
Distorted waveform
Time domain
Harmonics:
resultant waveforms

36. © Secure Meters Ltd
Understanding the impact on Power Factor:
(non-linear loads)
Displacement Power Factor (DPF) is the power factor as we know at fundamental system frequency 50Hz
Distortion power factor (DPF) is the distortion component associated with the harmonic voltages & currents present in the system.
True Power Factor (TPF) or just Power Factor is the product of the distortion power factor and Displacement power factor

37. © Secure Meters Ltd
K-factor:
K-factor rated transformer is designed to handle a degree of harmonic load currents without overheating. The
K-rating number of the transformer (1, 4, 9, 13, 20) is in indication of the amount of harmonic current the
transformer is capable of handling. The calculation of K-factor for a given load is outlined in IEEE C57.110
•
K-Factor 1: Motors, Incandescent Lighting, Resistance Heating, Motor Generators (without solid state drives)
•
K-Factor 4: HID Lighting, Induction Heaters, Welders, UPS with optional input filtering, PLC and solid state
controls
•
K-Factor 13: Multiple receptacle circuits in health care facilities, UPS without optional input filtering,
Production or assemble line equipment, Schools and Classroom facilities
•
K-Factor 20: SCR Variable Speed Drives, Circuits with exclusive data processing equipment, Critical care
facilities and Hospital operating rooms
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38. © Secure Meters Ltd
Crest factor:
38
Typical current waveform of a compact fluorescent lamp Typical voltage waveform in case of high impedance line supplying non-linear loads
The crest factor is the ratio between the value of the peak current or voltage(I
M
or V
M
) and its r.m.s. value.
For a sinusoidal signal, the crest factor is therefore equal to√2
For a non-sinusoidal signal, the crest factor can be either greater than or less than√2
The crest factor for the current drawn by non-linear loads is commonly much higher than √2. It is generally between 1.5 and 2 and can
even reach 5 in critical cases.
A high crest factor signals high current peaks which, when detected by protection devices, can cause nuisance tripping.

39. © Secure Meters Ltd
ITIC curve:
39
Steady State Tolerance: +/-10% from the nominal voltage.
Line Voltage Swell: Up to 120% of the RMS nominal voltage with duration of up to 0.5 seconds.
Low Frequency Decaying Ringwave: results from capacitor banks switching.
High-Frequency Impulse and Ringwave: transients that typically result from lightning strikes.
Dropout: Voltage dropout includes both severe RMS voltage sags and complete interruptions of the applied voltage, followed by immediatere-application of the nominal voltage.
Interruption may last up to 20 milliseconds
The ITIC curve is essentially an input voltage vs duration
performance plot that covers sags, swells, transients,
interruptions and steady state voltage variation at the input
terminals to the ITE equipment.
ITIC curve is published by Information Technology Industry
Council (ITIC), provides an AC voltage boundary that most
information technology equipment (ITE) can tolerate or ride
through without experiencing unexpected shutdowns or
malfunctions.

40. © Secure Meters Ltd
PQ: growing concern
Illumination
Processplant
Railways
Automobiles
Efficiency
Better controls using power electronics (non-linear)
Green
Power Quality

41. © Secure Meters Ltd
Power Quality –Increased concern
Homes
Cities and offices
Electric vehicle
Wind generator
Renewable
energy
Photovoltaic
Hydro power generation
Thermal power plant
Nuclear power plant
Factory
Smart grid
There is change in load mix
There will be an increase in numbers

42. © Secure Meters Ltd
Factors deciding monitoring location: IEEE 519:2014
•Regulatory requirements
•Supply contracts
•Area of vulnerability
•Network planning data
•Planning major load into grid
•Bus with sensitive customer / loads
•Bus with polluting customer / loads
•Grid operation and management
42
Point of common coupling (PCC):
PCC is usually taken as the point in the power system closest to the user where the system owner or operator could
offer service to another user

43. © Secure Meters Ltd
•
Defined on case to case basis but no enforcement
•
Absence of reliability indices monitoring
•
Regulations are not uniform for voltage and harmonic controls
•
Monitoring power quality is still not a mandate
•
Other power quality parameters related to voltage are not monitored
•
No penalty or incentive is ever specified
Reliability Voltage Harmonics
SAIDI
SAIFI
CAIDI
Unbalance
Variation
THD –Voltage
THD -Current
Why PQ monitoring practices are not implemented?
IEEE 519IEEE 1366 Regulations
Not suitable for
continuous monitoring

44. © Secure Meters Ltd
A PQ deployment strategy:
Identify polluting
consumers
Identify vulnerable
equipment
Identify weak
installations
Monitor Power Quality
Improvement advice
& penalty tariff
Protect expensive
equipment
Improve installations
Improve Revenues
Meet compliance obligations

45. © Secure Meters Ltd
Power quality assessment -Use cases
45
Objective
Preferred
Monitoring
duration
How it helps Typical use case
Compliance assessment ContinuousSupply complies with performance standardsEN50160 compliance
Benchmarking and
performance analysis
Continuous
Asset management,network planning and
augmentation
Network planning studies in Transmission System
Operators (TSO) and DSOs
Site characterization Short term
Preventing impact of new connection on
infrastructure
E.g. a new steel plant getting connected to the grid
Trouble-shooting Short termAnalyze a reported power quality problem
Customer reports a issue with quality of supply
causing some frequent issues in the plant
Advanced applications Continuous
Locating faults, automated analysis of
PQ signatures
Network automation
Active PQ management ContinuousNetwork management
Network automation, real time monitoring and
control of supply parameters
PQ assessment in industrial /
commercial establishments
Continuous /
Short term
Monitor, understand and analyze PQ at critical/
sensitive loads and overall establishment

46. © Secure Meters Ltd
State regulation for Solar/Wind –grid connection
APTransCo
WBREC

47. © Secure Meters Ltd
State regulation –
designated consumers/ distribution licensee
Punjab State
Regulation
Maharastra State
Regulation

48. © Secure Meters Ltd
Where to Install !!
Distribution /
Transmission
Utility
Infinite Grid
Meter test report –
before installing at
PCC
Conformance
certificate as desired
by TransCo–before
connecting to Grid /
Yearly audit
Meter test report –
before installing at
PCC

49. © Secure Meters Ltd
Integrated over two box solution

50. © Secure Meters Ltd
Revenue + Power quality monitoring solution
Conventional
Genco
1 to N
Renewable Genco
1 to N
Discoms S/S
1 to n
Industries (non-linear loads) 1 to N
Revenue metering solution PQ Analytics S/W & reports
PCC (Point of common coupling)
Continuous PQ measurement
PQ meter
Power quality data:
Sags/ Swells, Interruptions (Short/long), Rapid voltage
change, Harmonics, Flicker, Phase Unbalance
Revenue data
1.Logger (Dual)
2.Billing Energy
3.Midnight Snap
4.Tamper/event
PQ compliance
Reports
EN50160
(Customized)IEEE 519(2014) PQ EventsIS 17036
Ethernet port

51. © Secure Meters Ltd
Benefits of Power quality measurement:
•
Compliance assessment (Knowledge about real power quality level & trends -meet the regulator needs) –IS 17036, EN 50160 and IEEE 519
•
Integrated solution (Revenue 0.2S + PQ Class A) saves time and cost
•
Same CT / VT can be used for both parameter, reducing installation cost.
•
Complete turnkey solution (supply, installation, commissioning and AMC for 5 years) over cloud, minimized data security and backup and reduced maintenance
of hardware.
•
Benchmarking and performance analysis (Asset management, network planning and augmentation)
•
Preventing impact of new connection on infrastructure
•
Locating faults, automated analysis of PQ signatures
•
Monitor, understand and analyze PQ at critical/ sensitive loads and overall establishment
•
Identifying upstream / downstream PQ events, to identify the source of origin and take corrective actions.
•
Identifying repetitive events (leading to failure of network / false tripping of protection devices) or problematic customers, polluting the grid.
•
Monitor Harmonic emission from consumers (DISCOM / industrial customers) etc.
•
Providing evidence / back up data for imposing penalty on customers, polluting the grid with Harmonics.
•
Planning data for investments
•
Optimiseand monitor contracts with supplier or consumer
•
Supports optimisationof electrical networks
•
Monitor performance of protection devices
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52. © Secure Meters Ltd
Firewall
System architecture: Gateway (dual SIM) communication
Cellular Network
Sub-station
Cloud hosted -Central Data Centre –Revenue + Power Quality
Network Switch
Gateway
Revenue + PQ data
PQ data and report
•
PQ events
•
IS17036
•
EN50160
•
IEEE519
GPS clock
•
Main server
•
Standby server
•
App server
•
Web server (for Internet)
•
Network Monitoring Server
Audit data
•
Logger
•
Midnight
•
RP Events
•
Cummenergy
Router
User
Interface with Utility SCADA
(read only access of DB)
Utility USERPower Quality Meter
Ethernet
port
URL based access of Revenue
+ PQ data and reports
1
2
3

53. © Secure Meters Ltd
Thank you