Harmonics are a crucial aspect of a power system because they influence both the quality of the electricity and the performance of the equipment. High harmonic levels may cause components to overheat and shorten the device’s lifespan. Harmonics distort pure sinusoidal waveforms generated by an ideal power source. Harmonic distortion hinders a company’s production and operation capabilities. The following are some economic effects of harmonic distortion.
- (Joule effect) Harmonics lead to increased component losses.
- The presence of harmonics increases subscription power, thereby increasing customer service costs.
- As a result of the diminution of the power source, equipment dimensions must be increased.
- When the level of distortion reaches 10 percent, the tenure of a number of components is shortened and output decreases.
- Harmonics produce peak currents, resulting in output losses and significantly increasing the time required to recover system performance.
Motives of Harmonics:
When nonlinear loads draw current in irregular, fleeting surges, harmonics are produced. Due to the interference caused by these vibrations, harmonic currents can readily travel throughout the entire power system. Harmonics reduce the efficiency and purity of electricity in industrial contexts. The majority of commercial electrical systems can safely support up to 15% nonlinear loads. If the nonlinear loading percentage exceeds 15%, negative harmonic distortions may occur. Therefore, it is essential to monitor harmonic levels to ensure that they remain within the permitted parameters. Thus, harmonic research and analysis help maintain knowledge of potential hazards and their underlying causes, making it easier to prevent harmonic-related issues during the design phase and reducing the likelihood of unintended outcomes.
Harmonic Analysis Methodology:
Despite the low probability of harmonic issues, a periodic harmonic analysis must be performed to ensure that the harmonic levels are acceptable. These are the progressions of harmonic levels:
- The first stage is to obtain an electrical one-line diagram and identify any potential nonlinear loads.
- The location of the common coupling (PCC) is highlighted in the illustration.
- In system vehicles, distortion-sensitive vegetation is highlighted.
- All information regarding harmonics has been collected.
- Obtain from utility companies the established PCC values, including the maximum and minimum levels of short circuit faults and the allowable current and voltage harmonics.
- Using freely available software, a simulated harmonic analysis is carried out.
- Analyze the electrical system’s harmonics.
- Analyze the current and voltage discrete and overall aberrations at the buses and PCC.
- Create a spectrum of frequency harmonics.
- Select suitable harmonic control techniques. Harmonic distortion exceeds the permissible limits.
- After compensating for mitigating variables, the harmonic analysis should be repeated.
CareLabs is an authorized provider of harmonic research and analysis. Experienced professionals can perform precise, risk-free testing to identify levels of problematic harmonics and can assist in maintaining appropriate harmonic levels without causing additional problems.
Benefits of the CareLabs Service:
- Electrical systems that comply with regulatory requirements and are safer.
- Integrated energy systems save both time and money.
- Create a more secure workplace.
- Provide straightforward solutions when the situation calls for them.
- Increase the safety margins.
- By automatically generating arc flash labels and work permits, you can save time.
- By avoiding sanctions and legal fees, it is possible to save money.
CareLabs has personnel stationed in multiple locations to ensure that personnel is readily available in the event of a routine or urgent emergency. CareLabs has promptly established itself as an ISO 9001:2008-accredited organization and amassed a distinguished clientele. CareLabs offers research and analysis for harmonics in several significant locations, including Riyadh, Jeddah, Mecca, and Medina.
