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Analysis of Harmonics in the Hong Konger Power System:

Power plays an important function in modern society. The bulk of daily-use objects are connected to power in some way. People must be supplied with electricity in a safe and cost-effective way using the most advanced power technologies. Due to harmonics, the RMS of the circuit’s current flow increases, hence increasing the loss. This has resulted in several electrical grid concerns. Harmonics may influence the loads and the distribution system. Harmonics may also wreak havoc on sensitive equipment and appliances in your business or industrial building. Harmonic breakdown typically does not emerge quickly, and it might be difficult to differentiate it from normal wear and tear. 

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Harmonic Distortion – Definition:

If minor harmonic difficulties emerge, the power supply’s reliability might be compromised. Harmonics in the electric current and voltage produce problems with the electrical grid. An abundance of harmonics in the power supply may cause damage or malfunctions. Harmonics, or fluctuations in the shape of the current waveform, are frequently caused by nonlinear loads in electrical systems. Personal computers, powered motors, fax machines, laser printers, switch-mode power supplies (SMPS), batteries, and uninterruptible power supplies are the sources of nonlinear loads and harmonics in power systems (UPS). 

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The Necessity for Harmonic Analysis:

Harmonic influences the operation efficiency of power systems. Using harmonic analysis to look for harmonics helps increase the dependability of your power system. As the use of power electronics equipment increases, currents that do not flow in a straight line are generated. The systems were under considerable strain, which resulted in harmonics. Equipment and devices must comply with energy efficiency standards and use less electricity. 

When did knowledge of harmonics become essential?

  • If the overall load or readings from the bus system exceed 25 percent of the total load, examine the harmonic restrictions.
  • To handle problems such as equipment damage and failures caused by harmonics.
  • As the plant grows, when and how many nonlinear loads will be introduced?
  • When adding a capacitor bank to an existing electrical system, a harmonic analysis is necessary.
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When a sinusoidal waveform confronts a nonlinear demand, harmonics are produced. Harmonic analysis is frequently performed when it is essential to establish whether a system has harmonics. 

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Included Among the Benefits of Removing Harmonics from the Power Supply Are:

  • Harmonic analysis reduces operating expenditures by decreasing the amount of energy lost by cables, switch gears, and safety devices. Moreover, it prevents power loss inside the power system.
  • It helps eliminate huge transformers and decreases the RMS current in the power system, resulting in lower capital expenditures. Consequently, less cable, switchgear, and busbars are required.
  • When losses are minimized and the RMS current value is dropped, there is an instantaneous improvement in business performance. Harmonics generate losses, the RMS value of the current grows, and the temperature of cables, transformers, motors, and capacitors increases. The results will be negative, and you may be forced to cancel an operation or incur monetary loss.
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How to Perform a Power Quality Analysis?

  • Get the one-line graphic depicting the nonlinear loads.
  • Focus on the junction of the two notions in particular (PCC).
  • Highlights the risk that harmonics may influence the plant’s buses.
  • Learn as much as you can about non-linear loads and how the electric company has dealt with harmonics in the past.
  • Create a simulation of the operation of the electrical system using the ETAP program.
  • Analyze the voltage and current distortion as well as the harmonics.
  • Consider a solution if the amount of harmonic distortion is excessive.
  • After implementing the approach to remedy the issue, re-perform the harmonic analysis to check that you follow the CEC.

CareLabs equips its personnel with innovative tools so that they can assure the security of your electrical equipment and offer you a safe working environment. Receive further information and a quote for CareLabs’ harmonic research and analysis services immediately. 

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