Power quality improvement with harmonic filters

In electrical plants the loads draw from the network electric power (active) as power supply source (e.g. personal computers, printers, diagnostic equipment, etc.) or convert it into another form of energy (e.g. electrical lamps or stoves) or into mechanical output (e.g. electrical motors). To get this, it is often necessary that the load exchanges with the network (with net null consumption) the reactive energy, mainly of inductive type.

This energy, even if not immediately converted into other forms, contributes to increase the total power flowing through in the electrical network, from the generators, all along the conductors, to the users. To smooth such negative effect, the power factor correction of the electrical plants is carried out.

The power factor correction obtained by using capacitor banks to generate locally the reactive energy necessary for the transfer of electrical useful power, allows a better and more rational technical-economical management of the plants.

Passive Filter

Capacitor banks can be used combined with inductors in order to limit the effects of the harmonics on a network. Actually, the combination capacitor-inductor constitutes a filter for harmonics.

To avoid the negative effects of resonance, it is necessary to insert an inductor in series with a capacitor. By applying an analogous reasoning, it is possible to think of placing in a point of the network a combination of an inductor and a capacitor properly dimensioned in order to get the same resonance frequency of the order of the current harmonic to be eliminated.

In this way, the assembly inductor-capacitor presents a very low reactance in correspondence with the harmonic to be eliminated which shall circulate in the assembly without affecting the whole network.

Therefore this filter, called passive filter, consists in a capacitor connected in series with an inductor so that the resonance frequency is altogether equal to the frequency of the harmonic to be eliminated. Passive filters, which are defined on a case by case basis, according to a particular harmonic to be filtered, are cost-effective and easy to be connected and put into function.

Active Filter

Active filters instead can automatically eliminate the current harmonics present in a network in a wide range of frequencies. Exploiting power electronic technology, they can inject a system of harmonics able to neutralise those present in the network.

The active filter has the advantage of filtering simultaneously dozens of harmonics and does not involve design costs for dimensioning.

FOR POWER QUALITY STUDY & AUTOMATED REPORT: Connect with Emerich Energy

Please write to us info@emerich.in Call: 044-48577667

Industries need to review the Power Quality in their electrical infrastructure

Steel,Cement and Renewable energy Industries are being urged to reconsider their supporting electrical infrastructure. We are advising companies to invest in the Emerich Power Quality products. Designed to eliminate pulse-width modulation (PWM) frequencies to protect the electrical infrastructure, the products also increases the efficiency of the drive by improving power quality and it gives plenty of Power Quality benefits 

Regenerative power systems, such as solar panels and wind turbines, require extra care to ensure that the quality of the regenerated power is sufficient enough to be safely passed onto the grid. Often, the power is affected by harmonic distortions, which are generated by the high-speed switching of the power semiconductors in the frequency inverter.

In many instances, the filters being used are not designed to manage the issues that occur during the regenerative stage and, as they don’t appear to be fulfilling their primary function, plant engineers often turn these filters off completely. 

High-performance filters, like the Emerich AHM can be used in regenerative electrical systems to harness the harmonic currents that occur from high electrical frequencies.

Working to remove harmonic distortion from the network, the Emerich AHM filter has been designed so that it features a choke, which blocks higher-frequency alternating current (AC), while allowing direct current (DC) to pass through.

“However, regenerative energy systems often experience issues like harmonic distortions in their main lines, which reduce the overall quality of the energy generated. In addition to this, unresolved power issues can reduce the lifespan of individual components in the electrical infrastructure, like the drives.

“To help renewable energy companies overcome this, we designed the Emerich AHM filter so that it features a choke, which blocks higher-frequency AC power without hindering the flow of DC. The product also features a natural cooling component so that the filter does not overheat while in operation. This increases the overall efficiency of the drive, which in turn reduces energy costs.”

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Name: Emerich

Emerich Means - Powerful Ruler; Brave; Power; Work; Rich

Symbol: Power & Energy Pyramid with Sun surrounded by earth and mind for Futuristic Vision.

Pyramid refers

The word Pyramid from Greek origin which means ultimate origin & Organization or system that is structured with fewer people or things at each level as one approaches the top and achieve a substantial return on money after making a small initial investment.

Emerich Energy Pyramid Emerich Energy Pyramid The Pyramid of Success  Emerich_Success FOR POWER QUALITY STUDY, SOLUTIONS & AUTOMATED REPORT:   Connect with Emerich Energy Please write to us info@emerich.in Call: 044-48577667 / 9940197778