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Mar 30,2021
Why harmonics analysis? When a voltage and/or current waveform is distorted, it causes abnormal operating conditions in a power system such as: Voltage Harmonics can cause additional heating in induction and synchronous motors and generators. Voltage Harmonics with high peak values can weaken insulation in cables, windings, and capacitors. Voltage Harmonics can cause malfunction of different elect...
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Apr 26,2021
Power Factor Penalty An electric rate may also include additional charges when the customer has a power factor less than some preset limit, typically between 80 and 90 percent. This is called a power factor penalty since it is a penalty assessed on the customers electrical bill for lower than optimum power factor. Special devices called capacitors can be installed by either the utility or the cust...
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May 05,2021
A SECONDARY SOURCE Electricity is the set of physical phenomena associated with the presence and motion of matter that has a property of electric charge. Electricity is related to magnetism, both being part of the phenomenon of electromagnetism, as described by Maxwell's equations. Various common phenomena are related to electricity, including lightning, static electricity, electric heating, elect...
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May 18,2021
Harmonics and Active Power Filter In recent years, the use of non-linear load is increasing day by day. Non-linear loads such as traditional diode/ thyristor rectifiers with inductive load generate harmonic and reactive current, which leads to poor power factor, low energy efficiency, and harmful disturbance to other appliances. Also, in recent years, the large-scale use of the power electronic eq...
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May 31,2021
Power Qaulity Issue Power quality issues can increase your utility and operating costs. In a 3-phase power system, any disturbance on one parameter (magnitude, frequency, waveform, or symmetry) is classified as a power quality problem. Even minor disruptive voltage fluctuations can cause major issues from equipment malfunctions, to flickering lights, to complete power shutdowns. Power quality prob...
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Jun 07,2021
Energy consumption pattern The energy pattern given in below table is helpful in understanding the way energy is used in a foundry and helps to control energy cost by identifying areas where waste can occur and where scope for improvement may be possible. It is observed that melting consumes a major portion of total energy consumed. SN Sections Energy Consumption 1 Melting(Furnance) 70% 2 Molding ...
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Jun 16,2021
Power factor penalty in power bills We've found that many people struggle to understand how Power Factor (PF) impacts demand charges. Frequently, end use customers pay a significant premium each month in demand charges because their PF is below a threshold set by the utility in the rate tariff. Oftentimes its not obvious to the untrained eye when there are extra charges associated with a bad PF on...
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Jul 22,2021
An example of how to calculate the capacity of reactive power (kVAr)? An Motor is supplying a load of 700 kW at a P.F (Power factor) of 0.65. What size of Capacitor in kVAr is required to raise the P.F (Power Factor) to unity (1)? And how many more kW can the motor supply for the same kVA loading when P.F improved. Supplying kW = 700 kW Original P.F = Cosθ1 = 0.65 Final P.F = Cosθ2 = 1 θ1 = C...
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Sep 07,2021
Formulas of Related Harmonics The following calculator computes the total harmonic current distortion (THDc or THDi), Peak Current, RMS Current, and Crest Factor based on individual harmonic current distortion values between the 1st and the 50th harmonic. Input the fundamental current and individual harmonic currents to compute THDc(THDi) also to view a waveform plot based on the input values. The...
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Oct 28,2021
ZDDQ-AHF Active Harmonic Filter ZDDQ Active Harmonic Filter(AHF) is used to improve Power Quality through autonomous detection and dynamic filtering of harmonic currents present in power grid. ZDDQ Active Harmonics Filter is a perfect comprehensive solution to power quality problems with power grid such as harmonic wave, reactive power, and three-phase load unbalance. ZD AHF is connected in parall...
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Nov 05,2021
ZDDQ Active Harmonic Filter(APF/AHF for short) is a perfect comprehensive solution to power quality problems with power grid such as harmonic wave(can filter 2nd to 50th harmonic interference completely), reactive power, and 3 phase load unbalance. Active Harmonic Filter is connected in parallel in power grid, to detect the harmonic wave in power grid in real time, generate the reverse-phase compe...
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Nov 22,2021
Reliable power distribution is needed to guarantee patient health and save lives in hospital. Continuity and reliability of power supply are extremely important in hospital.UPS,Generator,Medical devices include high volume of harmonics current, and can impact the distribution system in hospital. ZDDQ Active Harmonics Filter Based on the broad knowledge and experience in terms of solutions and appl...
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Dec 04,2021
ZDDQ Active Harmonic Filter Active harmonic filter is connected in parallel with non-linear loads, and uses one set of CT to detect the load current. It calculates each order harmonic current by FFT algorithms in its DSP microchips, and then generates a compensating current with the same amplitude but opposite phase angles to the detected harmonic current, which cancels out the original load harmo...
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Dec 25,2021
Merry Christmas to all our friends.
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Jan 10,2022
ZDDQ Low Voltage Capacitor Bank for Reactive Power Compensation Reactive power compensation, is a technology that improves the power factor of the power grid in the power supply system, reduces the loss of power supply transformers and transmission lines, improves power supply efficiency, and improves the power supply environment. Therefore, the reactive power compensation device is in an indispen...
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Jan 20,2022
Static Synchronous compensator (STATCOM) is a fast-acting device capable of providing or absorbing reactive current and thereby regulating the voltage at the point of connection to a power grid. It is categorised under Flexible AC transmission system (FACTS) devices. The technology is based on VSCs with semi-conductor valves in a modular two-level configuration. ZDDQ Statcom have installed in many...
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Feb 18,2022
Thanks for Pakistan Client's trust and support. 300A Active Harmonic Filter Panels.
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Feb 28,2022
Harmonic is a wave with a frequency that is a positive integer multiple of the fundamental frequency, the frequency of the original periodic signal. The original signal is also called the 1st harmonic. ZDDQ AHF is the expert for harmonic filtering in power system. Main for: Ultra-fast reactive power compensation(Inductive and capacitive); Load balancing between phases and unloaded neutral wir...
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