Working Principles for Power Quality in Korea
Power supply quality affects distribution network devices quickly. The device should work and last as paid. The network should be reliable to avoid output difficulties and functionality loss. Several energy system issues exist. Poor power quality might damage equipment for any period. Power quality must be good to avoid equipment failure. This blog discusses power quality and dependability research. To evaluate effect and control, many power quality monitoring methods and systems are studied. Power quality disruptions are less visible than reliability difficulties, which cause long-term power outages. Due to malfunctioning machinery or process delays, certain power quality interruptions are instantly noticeable, but others are not. Short sags and breaks are affected. In other circumstances, power quality improvements may take time. Failure of equipment is one. No one sees equipment fail. Power quality issues may cause considerable losses that are not recognized and accepted as company expenses.
Table of Contents
What Happens If the Power Goes Out?
The immediate economic impacts are as follows:
- The decrease in production
- An operation must be restarted at greater expense.
- Costs of equipment replacement and repair due to damage
- More pauses and starts
- People are worried about their safety and health.
- Costs associated with contract violations
- Indifference to the environment is fined.
- The interruption caused a huge increase in utility expenses.
A selection of indirect economic consequences includes the following:
- The expenses incurred by a business because of a revenue or income delay.
- How much does losing market share cost?
- What does regaining brand value cost?
The following financial repercussions:
- An increase in temperature within a structure might endanger people’s safety, health, or functionality.
- A personal harm or concern
- Has participated in at least one large information transformation engagement in the appropriate area.
Determining the Root Reasons of Insufficient Power:
A power supply system’s voltage, frequency, and waveform can be used to determine whether it complies with power quality requirements. However, a variety of factors have an impact on the quality of electricity. The following issues concerning the quality of power are covered in this blog:
- Constant voltage
- Voltage imbalance
- Electrical energy harmonics
- Voltage flickering or fluctuation
- Power fluctuations and blackouts
Less study has been done on less common phenomena such swells, transients, inter harmonics, and noise.
1. Constant Voltage:
Long-term constant voltages are referred to as steady-state voltages (minutes or hours). Equipment failure, increased energy consumption by equipment, and system failure arises from prolonged high voltage levels (overvoltage) or low voltage levels (undervoltage).
2. Voltage Imbalance:
Higher losses are frequently the result of imbalanced voltage, particularly in induction and three-phase motors.
- Bearing wear and an opposing torque follow from this.
- More stator and rotor heating
- Less current may be carried by installation wires.
- Losses on the neutral conductor are greater.
- Through wires, more electricity is lost.
3. Electrical Energy Harmonics:
All energy consumers generate harmonic currents, which are then contributed to the power grid. Alternating currents with harmonic frequencies have fundamental frequencies that are multiples of 50 hertz. Nonlinear electronics like computers, variable speed drives (VSD), and discharge lamps frequently produce harmonic currents. The installation and the electrical grid could both suffer significant damage from harmonic currents. Harmonic can cause a number of problems, such as damage to installation parts, component loading, inefficient use of the installation’s current carrying capability, shorter component lifetimes, and ineffective action of protective components.
4. Voltage Flickering or Fluctuation:
To produce flickering, the voltage waveform envelope is modified. It results in a predictable variation in the intensity of incandescent light. Some people may get headaches, lose productivity, or, in rare instances, experience seizures because of this constant variation in the amount of light being emitted.
5. Power Fluctuations and Blackouts:
Voltage dips and interruptions often have negligible effects on equipment, but longer disruptions frequently cause equipment to trip and lose output. In general, it may be argued that a long interruption does not cost as much as it does. Instead, a logarithmic curve is used. People claim that the factors listed below significantly affect how much a protracted outage will cost:
- According to reports, the cost difference between a disruption lasting one second, one minute, and one hour is negligible in the industrial sector.
- The day, time, and location of the event (weekday, weekend, daytime, nighttime)
To calculate the total cost of disruptions for all customers, AEMO employs the value of customer dependability (VCR). These figures mostly show how much customers are willing to pay to prevent an interruption, although this desire to pay is closely tied to the actual cost. These calculations show that a one-second interruption costs around 20% less than an hour-long disruption.
How Can Issues with Electricity Quality Be Minimized?
CareLabs provides a variety of services to identify and assess power quality issues. Here is a list of them:
- Load Flow Analysis: This analysis is carried out based on how the system is used. Power flow, voltage, power factor, and system losses are all predicted.
- Harmonic analysis is the practice of looking for and predicting harmonic issues using computer algorithms. The data may also indicate strategies to make savings.
- Examining the sources of surges and transients, this paper analyses both phenomena.
- This investigation would follow the value and trajectory of the voltage as well as its short-term peaks and valleys.
- The optimal reactive power at the distribution and load ends will be discovered through this research of reactive power.
- This study would determine how much captive power is required to satisfy demand while reducing energy surcharges and fuel use.
CareLabs investigates and assesses power quality using the program called ETAP (Electrical Transient Analysis Program). It is the best program for modelling and calculating every part of the electrical system to ensure the equipment’s safety. In significant cities such as Seoul, Busan, Incheon, Daegu and Gwangju, we provide power quality analysis services. To raise the caliber and dependability of your electrical installation, CareLabs strives to provide you with the best service imaginable. To arrange a power quality investigation or to get a price, contact us right away.
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