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Power quality in electrical systems

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Trinity Energy
Trinity Energy

The quality of power supply is very important in any power network particularly to electricity consumers. Power quality encompasses availability of supply, frequency and voltage magnitude as well as waveform characteristics of the power supply.

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change makers in intelligent power quality management. 386, Savli G.I.D.C. Industrial Estate, Nr. Manjusar, At & Po : Alindra, Tal.: Savli, Dist. Vadodara - 391 775
Power Quality in Electrical Systems The quality of power supply is very important in any power network particularly to electricity consumers. Power quality encompasses availability of supply, frequency and voltage magnitude as well as waveform characteristics of the power supply. Power is described to be of good quality if the electricity supply is constant at acceptable, steady values of voltage and frequency; and has smooth sinusoidal waveform. However, in practice, varying electricity demands, certain equipment (at home, office and industry) and faults cause disturbances on the power system, thereby causing it to deviate from normal characteristics. Power quality is poor when at least one of these occurs • The supply is not constant (outage or interruption), • When the supplied voltage is lower to or above acceptable range of magnitude, • When the power system frequency is fluctuating. • And when the current and voltage sinusoidal waveform of the supply is distorted.
So power quality can be defined as the extent of deviation from nominal values of frequency, current and voltage magnitude. The deviation can also be in term of shape of waveform. Power Quality may also be explained to be the degree to which the supplied power is compatible with the smooth operation of electrical equipment. In other words, it is a measure of how well a power system supports smooth operation of its loads. From a customer perspective, Power Quality problem is any power problem manifested in voltage, current, or frequency deviations which result in power failure or misoperation of customers’ equipment. Poor power quality is a serious problem for Domestic, commercial and industrial consumers. For instance, some appliances and gadget at domestic level may not work properly if the voltage is below or above acceptable value which may even damage the appliance. Poor power quality may cause bulb and electrical equipment to malfunction or not operate at all and which eventually leads to early failure. In industries, low power quality is problematic for increasingly automated sensitive production machineries. There has been steady increase of power quality research and publications in the last two decades as result of significant concern and increase of power quality problems mostly caused by proliferation of electronics equipment such as power electronic, energy-efficient lighting, information technology equipment etc. Most of the publications detail some causes and mitigation techniques of poor power quality. In this paper, in addition to presentations of more causes and its effect, emphasis is placed on power quality monitoring and in design stage of electrical systems and equipment. Power quality challenges can be drastically reduced if equipment and power systems are designed to cope well with it.
Power Quality issues surface in electric equipment, electric arc furnace, aircraft electrical system, railway systems, renewable energy, electric motors, industrial processes, in power transmission and distribution systems; and in many other electric power systems applications. Power Quality involves areas of voltage variations, frequency fluctuations, transient, harmonics, current and voltage imbalance etc. Causes of Poor Power Quality The complexity of a power system to convey electric energy from the point of generation far away from load centres to the point of utilization combined with variations in demand, weather conditions, unbalanced loading on distribution transformer phases as well as the use of complex and electronic equipment by consumers and many other factors allow many chances for reduction in the delivered power quality. Quite a number of issues cause power quality to be poor. Whatever happen in power systems that causes changes from nominal values of supplied voltage, that distort the waveform sinusoid, that affect frequency stability, will degrade power quality We view excellence not as something to be achieved, but as something to be sustained.
Trinity Energy Systems Pvt. Ltd. With electrical controls becoming intelligent and the coming of IoT, there are unprecedented possibilities in enhancing power quality management to the benefit of power consumers. Trinity Energy is an early adopter of these emerging digital technologies and is known to be a change maker in this new era. Benefits of power quality management THANK You 386, Savli G.I.D.C. Industrial Estate, Nr. Manjusar, At & Po : Alindra, Tal.: Savli, Dist. Vadodara - 391 775 info@trinityenergy.co.in www.trinityenergy.co.in CONTACT USAT

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Power quality in electrical systems

  • 1. change makers in intelligent power quality management. 386, Savli G.I.D.C. Industrial Estate, Nr. Manjusar, At & Po : Alindra, Tal.: Savli, Dist. Vadodara - 391 775
  • 2. Power Quality in Electrical Systems The quality of power supply is very important in any power network particularly to electricity consumers. Power quality encompasses availability of supply, frequency and voltage magnitude as well as waveform characteristics of the power supply. Power is described to be of good quality if the electricity supply is constant at acceptable, steady values of voltage and frequency; and has smooth sinusoidal waveform. However, in practice, varying electricity demands, certain equipment (at home, office and industry) and faults cause disturbances on the power system, thereby causing it to deviate from normal characteristics. Power quality is poor when at least one of these occurs • The supply is not constant (outage or interruption), • When the supplied voltage is lower to or above acceptable range of magnitude, • When the power system frequency is fluctuating. • And when the current and voltage sinusoidal waveform of the supply is distorted.
  • 3. So power quality can be defined as the extent of deviation from nominal values of frequency, current and voltage magnitude. The deviation can also be in term of shape of waveform. Power Quality may also be explained to be the degree to which the supplied power is compatible with the smooth operation of electrical equipment. In other words, it is a measure of how well a power system supports smooth operation of its loads. From a customer perspective, Power Quality problem is any power problem manifested in voltage, current, or frequency deviations which result in power failure or misoperation of customers’ equipment. Poor power quality is a serious problem for Domestic, commercial and industrial consumers. For instance, some appliances and gadget at domestic level may not work properly if the voltage is below or above acceptable value which may even damage the appliance. Poor power quality may cause bulb and electrical equipment to malfunction or not operate at all and which eventually leads to early failure. In industries, low power quality is problematic for increasingly automated sensitive production machineries. There has been steady increase of power quality research and publications in the last two decades as result of significant concern and increase of power quality problems mostly caused by proliferation of electronics equipment such as power electronic, energy-efficient lighting, information technology equipment etc. Most of the publications detail some causes and mitigation techniques of poor power quality. In this paper, in addition to presentations of more causes and its effect, emphasis is placed on power quality monitoring and in design stage of electrical systems and equipment. Power quality challenges can be drastically reduced if equipment and power systems are designed to cope well with it.
  • 4. Power Quality issues surface in electric equipment, electric arc furnace, aircraft electrical system, railway systems, renewable energy, electric motors, industrial processes, in power transmission and distribution systems; and in many other electric power systems applications. Power Quality involves areas of voltage variations, frequency fluctuations, transient, harmonics, current and voltage imbalance etc. Causes of Poor Power Quality The complexity of a power system to convey electric energy from the point of generation far away from load centres to the point of utilization combined with variations in demand, weather conditions, unbalanced loading on distribution transformer phases as well as the use of complex and electronic equipment by consumers and many other factors allow many chances for reduction in the delivered power quality. Quite a number of issues cause power quality to be poor. Whatever happen in power systems that causes changes from nominal values of supplied voltage, that distort the waveform sinusoid, that affect frequency stability, will degrade power quality We view excellence not as something to be achieved, but as something to be sustained.
  • 5. Trinity Energy Systems Pvt. Ltd. With electrical controls becoming intelligent and the coming of IoT, there are unprecedented possibilities in enhancing power quality management to the benefit of power consumers. Trinity Energy is an early adopter of these emerging digital technologies and is known to be a change maker in this new era. Benefits of power quality management THANK You 386, Savli G.I.D.C. Industrial Estate, Nr. Manjusar, At & Po : Alindra, Tal.: Savli, Dist. Vadodara - 391 775 info@trinityenergy.co.in www.trinityenergy.co.in CONTACT USAT