Working Principles for Power Quality in Taiwan
The fundamental functioning and performance of equipment connected to the distribution network are directly affected by the quality of the power supply. It is anticipated that the equipment will function as intended and that its useful life will be about equal to the value provided. Similarly, it is anticipated that the network’s stability will be sufficient to prevent problems such as poor output or functionality loss. The power system is beset by several quality issues. These power quality disruptions, regardless of duration, may cause device damage. Therefore, it is vital to maintain power quality to prevent equipment failure. This blog will cover the research required for measuring the quality and reliability of power. Following this, different systems, and methods for assessing the effect and the regulation of power quality are investigated.
Unlike dependability, which is concerned with lengthy power outages, the repercussions of power quality disturbances are not immediately obvious. In certain circumstances, however, the immediate result of a power quality interruption is equipment damage and/or a process delay. This is especially true for pauses, interruptions, and ephemera. In certain cases, the impacts of a power quality disruption may not be immediately apparent. Equipment deterioration is one case. For decades, equipment damage goes unabated under these conditions. In In some situations, poor power quality will cause extra losses that are seen as unavoidable and are therefore overlooked.
Table of Contents
Effects of Poor Electricity Quality:
Direct economic implications include:
- The decline in output
- A process restart costs extra money.
- The expense of replacing and repairing damaged equipment
- More beginnings and ends
- People are concerned about their wellbeing and security.
- Damages brought on by a breach of contract
- Financial fines are applied for environmental indifference.
- The lack of electricity caused a sharp increase in utility costs.
Examples of indirect economic consequences include the following:
- The costs experienced by a firm due to a revenue or income delay.
- How much does a loss of market share cost?
- How much does regaining brand value cost?
Examples of economic repercussions include the following:
- A rise in temperature within a building that can impact its use, safety, or health.
- A personal injury or concern
- Unnoticed changes in power quality might pose an electrical threat.
Understanding the Sources of Substandard Electricity:
A power supply system’s voltage, frequency, and waveform are examined to determine its power quality. Nonetheless, power quality is affected by a variety of factors. This blog addresses the following electrical quality issues:
- Voltage Stability
- Voltage Imbalance
- Voltage Harmonics
- Flashing or Fluctuating Voltage
- Voltage Drops (sometimes referred to as voltage sags) and interruptions
Due to their infrequent occurrence, other phenomena such as swells, transients, inter harmonics, and noise have received less attention.
1. Voltage Stability
Long-term sustained voltage magnitudes (minutes or hours) are equal to steady-state voltage magnitudes. The principal repercussions of sustained high voltage (overvoltage) or low voltage (undervoltage) are equipment failure, increased energy consumption, and system failure.
2. Voltage Imbalance
Typically, unbalanced voltage is associated with greater losses, particularly in induction and three-phase motors.
- This causes reversal of torque and bearing wear.
- Added stator and rotor heating
- The installation wires’ current carrying capability diminishes.
- The neutral conductor incurs greater losses.
- Cables lose additional energy.
3. Voltage Harmonics
Most energy users generate and inject harmonic currents into the power grid. Alternating currents whose fundamental frequency is a multiple of 50 hertz are harmonic currents. The most popular non-linear electrical equipment that emits harmonic currents are computers, variable speed drives (VSDs), and discharge lights. Harmonic currents are especially detrimental to the installation and the power distribution network. Some of the effects of harmonics include damaged components, damaged installation parts, component loading, inefficient use of the installation’s current carrying capacity, shorter component lifespan, and ineffective operation of protective components.
4. Flashing or Fluctuating Voltage
Flicker is the envelope modulation of a voltage waveform. It causes cyclical changes in the light output of incandescent lighting sources. This cyclical variation in light output may cause pain, decreased productivity, headaches, and, in rare cases, seizures in certain people.
5. Voltage Drops
During voltage sags and interruptions, most equipment is not damaged; longer interruptions often result in output loss due to equipment tripping. A typical observation is that the cost of a protracted interruption is logarithmic rather than proportional to its duration. The following factors have a substantial influence on the cost of a protracted disruption, according to experts:
- In the manufacturing industry, for example, the cost difference between a one-second, one-minute, and one-hour disruption is minimal.
- The date, time, and location of the occurrence (weekday, weekend, daytime, nighttime)
To quantify the economic impact of outages on all users, AEMO determines the value of customer dependability (VCR). Even though these statistics mostly represent consumers’ willingness to pay to prevent a disturbance, it is expected that this willingness to pay has a strong correlation with the actual cost. According to these estimates, a one-second outage costs around 20% less than an hour-long outage.
How Could Issues with Electricity Quality Be Mitigated?
CareLabs offers a range of services to locate and evaluate power quality problems. Included are the following:
- Load Flow Analysis: This research is conducted in accordance with operating conditions. It calculates the power flow, voltage levels, power factor, and system losses.
- Harmonic Analysis: This is the process of identifying and predicting harmonic difficulties utilizing computer algorithms to uncover and identify them. In addition, reduction techniques based on the findings are presented.
- Analysis of Surges and Transients: This research identifies the causes of surges and transients.
- This investigation would examine the voltage’s short-term reduction and increase, as well as its value and trajectory.
- Reactive Power Study: This analysis will determine the preferred reactive power at the distribution and load ends.
- This project would measure and synchronize captive electricity to meet demand while simultaneously decreasing energy surcharges and fuel use.
CareLabs analyses and evaluates power quality using ETAP – Electrical Transient Analysis Program software. It is the best program for doing calculations and simulations for all electrical system components, ensuring the safety of the equipment. In all major cities, including Taipei, Kaohsiung, Taichung, and Tainan we provide power quality assessments. CareLabs provides the finest quality service to improve the reliability and quality of your electrical system immediately to assess the quality of your power or to receive a quote!
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