This document defines power factor and discusses causes of low power factor and methods of power factor correction. Power factor is the ratio of actual power to apparent power, with a value of 1 for purely resistive loads. Inductive loads like motors cause lower power factors by creating a phase difference between voltage and current. Power factor correction uses capacitors rated in KVAR to offset inductive loads and improve power factor. The advantages of correction include reduced costs, increased system capacity, and improved voltage stability.
Power Factor: what it is, how to measure it and how to improve it to reduce u...Pulse Energy
Low power factor is expensive and inefficient. Energy utility companies often charge additional fees to large commercial, institutional, and industrial clients when their power factor drops below 0.95. Understanding power factor and knowing how to measure it and improve it generates significant energy savings for very little cost.
Mike Wrinch, P. Eng. presented an informative 45 minute webinar on understanding, measuring, and improving power factor to reduce energy bills in buildings and facilities. Mike’s presentation included:
* An explanation of power factor and how it affects energy bills and electric systems' distribution capacity
* An overview of the hardware and software needed to measure the power factor in buildings
* Solutions to improve a building’s power factor
Power Factor: what it is, how to measure it and how to improve it to reduce u...Pulse Energy
Low power factor is expensive and inefficient. Energy utility companies often charge additional fees to large commercial, institutional, and industrial clients when their power factor drops below 0.95. Understanding power factor and knowing how to measure it and improve it generates significant energy savings for very little cost.
Mike Wrinch, P. Eng. presented an informative 45 minute webinar on understanding, measuring, and improving power factor to reduce energy bills in buildings and facilities. Mike’s presentation included:
* An explanation of power factor and how it affects energy bills and electric systems' distribution capacity
* An overview of the hardware and software needed to measure the power factor in buildings
* Solutions to improve a building’s power factor
Engineering review on AC Power.
Presentation lecture for energy engineering class.
Course: MS in Renewable Energy Engineering, Oregon institute of technology
Power Factor Correction Methods
Fixed Capcitors
Synchronous Condensors
Phase Advancers
Switch Capacitors
Static Var Compensator(SVC)
Static Synchronous Compensator(STATCOM)
Modulated power filter capacitor compensator
Economics of power factor improvement
Economical comparison of increasing the power supply
Application of Capacitors to Distribution System and Voltage RegulationAmeen San
Application of Capacitors to
Distribution System and Voltage
Regulation
POWER FACTOR IMPROVEMENT,
System Harmonics
Voltage Regulation
Methods of Voltage Control
This PowerPoint depicts definition of Power Factor , its related factors, its necessity, its cause for low power factor, including graphics and graphs for better understanding among electrical students. It also consists of ways of improving Power Factor using capacitor and other devices. Also it has reference to the links from where it has been considered.
This is my own engineering power factor project for city and guilds advanced diploma
don't copy this because city and guilds always checking duplicates
Micro-controller based Automatic Power Factor Correction System ReportTheory to Practical
This project report represents one of the most effective automatic power factor improvements by using static capacitors which will be controlled by a Microcontroller with very low cost although many existing systems are present which are expensive and difficult to manufacture. In this study, many small rating capacitors are connected in parallel and a reference power factor is set as standard value into the microcontroller IC. Suitable number of static capacitors is automatically connected according to the instruction of the microcontroller to improve the power factor close to unity. Some tricks such as using resistors instead of potential transformer and using one of the most low cost microcontroller IC (ATmega8) which also reduce programming complexity that make it one of the most economical system than any other controlling system.
Engineering review on AC Power.
Presentation lecture for energy engineering class.
Course: MS in Renewable Energy Engineering, Oregon institute of technology
Power Factor Correction Methods
Fixed Capcitors
Synchronous Condensors
Phase Advancers
Switch Capacitors
Static Var Compensator(SVC)
Static Synchronous Compensator(STATCOM)
Modulated power filter capacitor compensator
Economics of power factor improvement
Economical comparison of increasing the power supply
Application of Capacitors to Distribution System and Voltage RegulationAmeen San
Application of Capacitors to
Distribution System and Voltage
Regulation
POWER FACTOR IMPROVEMENT,
System Harmonics
Voltage Regulation
Methods of Voltage Control
This PowerPoint depicts definition of Power Factor , its related factors, its necessity, its cause for low power factor, including graphics and graphs for better understanding among electrical students. It also consists of ways of improving Power Factor using capacitor and other devices. Also it has reference to the links from where it has been considered.
This is my own engineering power factor project for city and guilds advanced diploma
don't copy this because city and guilds always checking duplicates
Micro-controller based Automatic Power Factor Correction System ReportTheory to Practical
This project report represents one of the most effective automatic power factor improvements by using static capacitors which will be controlled by a Microcontroller with very low cost although many existing systems are present which are expensive and difficult to manufacture. In this study, many small rating capacitors are connected in parallel and a reference power factor is set as standard value into the microcontroller IC. Suitable number of static capacitors is automatically connected according to the instruction of the microcontroller to improve the power factor close to unity. Some tricks such as using resistors instead of potential transformer and using one of the most low cost microcontroller IC (ATmega8) which also reduce programming complexity that make it one of the most economical system than any other controlling system.
Analysis of Power Factor Improvement Techniques in case of Non Linear System ...Kaustubh Nande
The presentation provides a brief overview of the technology employed to eliminate the power factor reduction caused by non linear loads in the network.
giving details of reactive power compensation in simple way and the study we had and on base of it d capacitor we designed... and some references are also there to get more details of reactive power and its compensation
Soft power factor modification using staticchodachude
A good power quality at a system can optimize the efficiency of electrical energy utilization.
Comparison of active power and apparent power will produce a power factor (COS ø).Capacitors bank can
maintain optimum power factor with compensating some reactive power to the system. Static VAR
Compensator (SVC) is generally composed of a conventional capacitor bank in parallel with the load contactor
switch. This leads to a very large inrush current to the capacitor which will resulting damage to the
contactor switches and also capacitors. To reduce inrush current, thyristor is used as a replacement of
contactor switch. Switch can be set by adjusting the firing angle of thyristor. Power factor improvement consists
of a voltage sensor, current sensor, zero crossing detector, thyristor driver and the capacitor bank. The existing
load on the system consists of induction motor 125W, rectifier with load of series of incandescent lamp with
ballasts 85W and fluorescent lamp 20W.Cos phi variation of the load is 0.49 (lag), 0.99 (lag), 0.92 (lag) and 0.62
(lag) when all the loads connect to the system. Through the calculation, the value of capacitor that can
compensate the reactive power to the system is 5.12 µF, 2.71 µF, 2.41 µF and 9.55µF. The capacitor
installation obtain good response because it can increase the cos phi of system to 0.99 (lag) and the current
consumption of the system is smaller than the pre-installation of capacitors, which can reduce the line system
current up to 30% of the system current
Design of a 3-phase FC-TCR Static Var Compensator for Power factor correction...Hardik Parikh, E.I.T.
The research has shown that SVC has been proved successful to prevent negative sequence current more over it also has capabilities for Power factor correction.
• Negative-sequence current causes some problems in generator systems. Though every generator is capable of withstanding a certain level of negative-sequence current, excess and/or persistent amounts of negative sequence current may cause rotor overheating and serious damage.
• Since its frequency quite matches the natural mechanical frequency of turbine blades and the zero sequence current is blocked by delta connected step-up transformer, the negative sequence current becomes the only reason for the super synchronous resonance of a generator due to an unbalanced system, especially in an isolated power system.
• SVC has the potential to overcome some adverse effects of the negative sequence current to the turbine generator systems
the ratio of the actual electrical power dissipated by an AC circuit to the product of the r.m.s. values of current and voltage. The difference between the two is caused by reactance in the circuit and represents power that does no useful work.
Most loads in modern electrical distribution systems are inductive.
Examples include Motors, Transformers, and Induction furnaces. Inductive loads need a magnetic field to operate.
Inductive loads require two kinds of current:
Power-producing current (or working current) is that current which is converted by the equipment into useful work such as creating heat, light, motion ,machine output .
The Unit of measurement of the power produced is the kilowatt (kw).
Presented this powerpoint presentation in my university. The contents are as follows:
1) Types of Powers
2) Power Factor
3) Importance of Power Factor
4) Causes low power factor?
5) Disadvantages of low power factor
6) Methods for power factor improvement
7) Application of shunt capacitors in distribution network
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What are the main advantages of using HR recruiter services.pdfHumanResourceDimensi1
HR recruiter services offer top talents to companies according to their specific needs. They handle all recruitment tasks from job posting to onboarding and help companies concentrate on their business growth. With their expertise and years of experience, they streamline the hiring process and save time and resources for the company.
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Kseniya Leshchenko: Shared development support service model as the way to make small projects with small budgets profitable for the company (UA)
Kyiv PMDay 2024 Summer
Website – www.pmday.org
Youtube – https://www.youtube.com/startuplviv
FB – https://www.facebook.com/pmdayconference
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www.seribangash.com
A Memorandum of Association (MOA) is a legal document that outlines the fundamental principles and objectives upon which a company operates. It serves as the company's charter or constitution and defines the scope of its activities. Here's a detailed note on the MOA:
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https://seribangash.com/article-of-association-is-legal-doc-of-company/
Registered Office Clause: It specifies the location where the company's registered office is situated. This office is where all official communications and notices are sent.
Objective Clause: This clause delineates the main objectives for which the company is formed. It's important to define these objectives clearly, as the company cannot undertake activities beyond those mentioned in this clause.
www.seribangash.com
Liability Clause: It outlines the extent of liability of the company's members. In the case of companies limited by shares, the liability of members is limited to the amount unpaid on their shares. For companies limited by guarantee, members' liability is limited to the amount they undertake to contribute if the company is wound up.
https://seribangash.com/promotors-is-person-conceived-formation-company/
Capital Clause: This clause specifies the authorized capital of the company, i.e., the maximum amount of share capital the company is authorized to issue. It also mentions the division of this capital into shares and their respective nominal value.
Association Clause: It simply states that the subscribers wish to form a company and agree to become members of it, in accordance with the terms of the MOA.
Importance of Memorandum of Association:
Legal Requirement: The MOA is a legal requirement for the formation of a company. It must be filed with the Registrar of Companies during the incorporation process.
Constitutional Document: It serves as the company's constitutional document, defining its scope, powers, and limitations.
Protection of Members: It protects the interests of the company's members by clearly defining the objectives and limiting their liability.
External Communication: It provides clarity to external parties, such as investors, creditors, and regulatory authorities, regarding the company's objectives and powers.
https://seribangash.com/difference-public-and-private-company-law/
Binding Authority: The company and its members are bound by the provisions of the MOA. Any action taken beyond its scope may be considered ultra vires (beyond the powers) of the company and therefore void.
Amendment of MOA:
While the MOA lays down the company's fundamental principles, it is not entirely immutable. It can be amended, but only under specific circumstances and in compliance with legal procedures. Amendments typically require shareholder
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RMD24 | Debunking the non-endemic revenue myth Marvin Vacquier Droop | First ...BBPMedia1
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Retail media wordt gezien als het nieuwe advertising-medium en ook mediabureaus richten massaal retail media-afdelingen op. Merken die niet in de betreffende winkel liggen staan ook nog niet in de rij om op de retail media netwerken te adverteren. Marvin belicht de uitdagingen die er zijn om echt aansluiting te vinden op die markt van non-endemic advertising.
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2. OUTLINE
DEFINITION
CAUSES OF LOW POWER FACTOR
POWER FACTOR CORRECTION
ADVANTAGES OF POWER FACTOR CORRECTION
DISADVANTAGES OF LOW POWER FACTOR
CONCLUSION
REFERENCES
2
3. DEFINITION:
Power factor (P.F) is the ratio between actual power to
the apparent power.
Actual power/Apparent power.
P.F=Kw /Kva.
For a purely resistive load the power factor is unity. Active
and reactive power are designated by P &Q respectively.
The average power in a circuit is called active power and
the power that supplies the stored energy in reactive
elements is called reactive power.
3
4. Active Power:
Also known as “real power” or simply “power.” Active power
is the rate of producing, transferring, or using electrical
energy. It is measured in watts and often expressed in
kilowatts (KW) or megawatts (MW). The terms “active” or
“real” power are used in place of the term “power” alone to
differentiate it from “reactive power.
Apparent Power:
The product of the voltage (in volts) and the current
(in amperes). It comprises both active and reactive power .
It is measured in “volt-amperes” and often expressed in
“ kilovolt-amperes” (KVA) or “megavolt-amperes” (MVA).
4
5. POWER FACTOR DEFINITION
Inductive loads cause the current to lag behind the
voltage. The wave forms of voltage and current are then
"out of phase" with each other. The more out of phase
they become then the lower the Power Factor. Power
Factor is usually expressed as Cos Phi. (Ø)
5
6. Consider a canal boat being pulled by a horse.
If the horse could walk on water then the angle (Phi) Ø
would be zero and COSINE Ø=1. Meaning all the horse
power is being used to pull the load.
However the relative position of the horse influences the
power. As the horse gets closer to the barge, angle Ø1
increases and power is wasted, but, as the horse is
positioned further away, then angle Ø2 gets closer to
zero and less power is wasted.
6
7. CAUSES OF LOW POWER FACTOR
•
A poor power factor can be the result of either a
significant phase difference between the voltage and
current at the load terminals or it can be due to a high
harmonic content or distorted/discontinuous current
waveform. Poor load current phase angle is generally the
result of Poor load current phase angle is generally the
result of an inductive load such as an induction motor
power transformer, lighting ballasts, welder or induction
furnace, Induction generators Wind mill generators and
high intensity discharge lightings.
7
8. CAUSES OF LOW POWER FACTOR
•
A distorted current waveform can be the result of a
rectifier variable speed drive, switched mode power
supply, discharge lighting or other electronic load.
8
9. POWER FACTOR CORRECTION
Power factor decreases with the installation of non
resistive loads such as induction motors, Transformers.
Lighting ballasts and electronic equipments. Power
factors can be corrected by using capacitors. These are
rated in electrical units called VAR or KVAR.One VAR is
equivalent to one volt of reactive power. VAR then are
units of measurement for indicating just how much
reactive power the capacitor will supply.
9
10. •
As reactive power is usually measured in thousands
the letter K is used for thousand. the capacitor KVAR
rating then shows how much reactive power the
capacitor will supply. Each unit of the capacitor's KVAR
will decrease the inductive reactive power demand.
10
11. POWER FACTOR CORRECTION
•
Most loads on an electrical distribution system fall into
one of three categories; resistive, inductive or capacitive.
In most plant, the most common is likely to be inductive.
Typical examples of this include transformers, fluorescent
lighting and AC induction motors. Most inductive loads
use a conductive coil winding to produce an
electromagnetic field, allowing the motor to function.
11
12. All inductive loads require two kinds of power to operate:
Active power (KW) - to produce the motive force
Reactive power (KVAR) - to energize the magnetic field
The operating power from the distribution system is
composed of both active (working) and reactive (nonworking) elements. The active power does useful work in
driving the motor whereas the reactive power only
provides
the
magnetic
field.
12
13. POWER FACTOR CORRECTION
The amount of Power Capacitor KVAR required to correct
A system to a desired Power Factor level is the difference
between the amount of KVAR in the uncorrected system
and the amount of desired KVAR in the corrected
system. The most efficient location for power factor
capacitors is at the load. Capacitors work from the point
of installation back to the generating source. Individual
motor correction is not always practical, sometimes it is
more practical to connect larger capacitors on the
distribution bus or install an automatic system at the
incoming service along with fixed capacitors at the load.
13
14. KVAR CORRECTION
•
Capacitive Power Factor correction (PFC) is applied to
electric circuits as a means of minimising the inductive
component of the current and thereby reducing the
losses
in
the
supply.
The introduction of Power Factor Correction capacitors is
a widely recognised method of reducing an electrical
load, thus minimising wasted energy and hence
improving the efficiency of a plant and reducing the
electricity
bill.
14
15. •
It is not usually necessary to reach unity, i.e. Power
Factor 1, since most supply companies are happy with a
PF
of
0.95
to
0.98.
By installing suitably sized switched capacitors into the
circuit, the Power Factor is improved and the value
becomes nearer to 1 thus minimising wasted energy and
improving the efficiency of a plant or power factor can be
increased by synchronous motor or Synchronous
generators.
15
16. POWER FACTOR CORRECTION
METHODS
Static Var Compensator(SVC)
Fixed Capcitors
Switch Capacitors
Synchronous Condensors
Static Synchronous Compensator(STATCOM)
Modulated power filter capacitor compensator
16
17. DETERMINING CAPACITOR VALUE
Example
Power Factor1=74%
Actual Power=594 kw
Interested to boost up=97% ,Power Factor2=97%
Power Factor=KW/KVA
Cosθ = kW / kVA
θ = Cos-1 (PF1)
θ = Cos-1 (74%) =42.27 o
17
18. The reactive power was about:
Tanθ = kVAr / kW
kVAr = kW x tanθ
kVAr = 594 kW x tan (42.27) = 540 kVAr
If the power factor were increased to 97%, the reactive
power would be about:
Cosθ = kW / kVA
θ = Cos-1 (PF2)
θ = Cos-1 (97%) = 14.07 o
kVAr = kW x tanθ
kVAr = 594 kW x tan (14.07) = 149 kVAr
18
19. Thus, the amount of capacitance required to boost
power factor from 74% to 97% :
540 kVAr – 149 kVAr = 391 kVAr
So I recommended 400kvar
19
20. POWER FACTOR MEASUREMENT
Power factor can measure by using power factor meter
which is well known in power industry.
Power factor can also be calculated by installing watt
meter along with the Ampere meter and volt meter by
using the power factor basic formula.
Power factor=Actual Power/ Apparent power
20
22. ADVANTAGES OF POWER FACTOR
CORRECTION
Eliminate Power Factor Penalties
Increase System Capacity
Reduce Line Losses in distribution systems
Conserve Energy
Improve voltage stability
22
23. Increase equipment life
Save on utility cost
Enhance equipment operation by improving voltage
Improve energy efficiency
23
24. Reduction in size of transformers, cables and switchgear
in new installations.
Delay costly upgrades.
Less total plant KVA for the same KW working power.
Improved voltage regulation due to reduced line voltage
drop.
24
25. POWER COST REDUCTION
•
Utility companies in many areas include a penalty charge
in the electrical rate for low power factor. The installation of
power factor capacitors on the user's electrical distribution
system eliminates the necessity of paying premium rates to
the utility company for poor power factor.
25
26. •
The savings the utility company derives in reduced
generation, transmission and distribution costs are
passed on to the user in the form of lower electrical
charges. Three of the more common ways a utility
charges a user for poor power factor are based on
26
27. KW demand with a trigger point typically between 85%
and 95%
KVA demand
KVAR demand
When the utility uses either KVA demand or KVAR
demand as the basis for its penalty structure, all users
pay a penalty, but those with high power factor pay a
much lower penalty or none at all.
27
28. SYSTEM CAPACITY INCREASE
•
By adding capacitors to the system, the power factor is
improved and the KW capacity of the system is
increased. For example, a 1,000 KVA transformer with a
70% power factor provides 700 KW of power to the main
bus. With the installation of capacitors so that the power
factor is improved, say, to 90%, the KW capacity of the
system is increased to 900 KW. When a system power
factor is improved, the amount of reactive current flowing
Is lowered thus reducing transformer and distribution
circuit loads, and releasing system capacity.
28
29. VOLTAGE IMPROVEMENT AND POWER
LOSS REDUCTION
•
System losses are also reduced through power factor
correction by reducing the total current and power in the
system. A 20% reduction in current will yield a 36%
reduction in distribution system losses. In this situation,
an energy savings of as much as 50% will be realized
with the installation of power factor capacitors.
In addition, power factor capacitors decrease the
distribution system voltage drops and fluctuations.
29
30. DISADVANTAGES OF LOW POWER
FACTOR
Increases heating losses in the transformers and
distribution equipments.
Reduce plant life.
Unstabilise voltage levels.
Increase power losses.
Upgrade costly equipments.
Decrease energy efficiency.
Increase electricity costs by paying power factor
surcharges.
30
31. CONCLUSION
•
By observing all aspects of the power factor it is clear
that power factor is the most significant part for the utility
Company as well as for the consumer. Utility company
rid of from the power losses while the consumer free
from low power factor penalty charges.
By installing suitably sized power capacitors into the
circuit the Power Factor is improved and the value
becomes nearer to 1 thus minimising line losses and
improving the efficiency of a plant.
31
32. REFERENCES
Electrical Power System Design and Analysis
by M.E.EI-Hawary.
Power System Operations
by Robert H Miller.
IEEE papers
www.ABB.com
BC Hydro (www.bchydro.ca)
32