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Nov 21,2019
ZDDQ power quality correction products are part of the solution. Most utilities charge for peak electrical demand on each month’s electrical bill. The demand charge is to allow the utilities to recoup part of their capital investment in the distribution network they operate. Each customer pays a demand charge for its peak operating load. Often inherent in the structure of these demand charges is a...
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Nov 23,2019
Fundamental (component) The component of order 1 of the Fourier series of a periodic quantity. (IEV 161-02-17) Harmonic The component of the Fourier-series decomposition of a volt- age or current periodic wave. (IEV 161-02-18 modified) Harmonic order (h) The ratio of the frequency of a harmonic (fh) to the fundamen- tal (rated) network frequency (f1). (IEV 161-02-19 modified) Odd harmonics Harmoni...
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Nov 28,2019
Standard Features Enclosure ZDDQ Capacitor banks,free standing, compartmentalized, all welded, galvanneal steel construction with 3 point pad-lockable latching handles and stainless steel hinges. The enclosure is painted with a corrosion resistant ANSI gray-61 epoxy paint. NEMA 3R construction is standard; NEMA 12 and 4X are available as an option. Base of enclosure as well as capacitor supports a...
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Nov 29,2019
Industry background Chemical industry involves many mechanical processes with demanding quality requirements. Before any mechanical smelting, casting, or stamping, an induction melting furnace is used to melt metal. Most induction melting furnaces use a 6-pulse or 12-pulse rectifier, which produces high volumes of harmonic and reactive power. As a result, the production efficiency of induction mel...
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Dec 07,2019
Active Harmonic Filter Active Harmonic Filter has many potential applications where its use can offer plenty of benefits. Active Harmonic Filters have been proven to provide lowered disturbances, lower carbon dioxide emissions through improved energy efficiency, lower current consumption and increased production stability to name a few. Just as other technology has evolved, so have various product...
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Dec 19,2019
Method for determining compensation (Power Factor correction Guidelines) Step 1 Selection of the compensation mode The location of L.V capacitors banks in an installation constitutes the mode of reactive power compensation, which may be central (one location for the entire installation), by sector or group (section-by-section), at load level, or some combination of the latter two. In principle, th...
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Dec 19,2019
Method for determining compensation (Power Factor correction Guidelines) Step 2 Selection of the compensation type Different types of compensation should be adopted depending on the performance requirements and complexity of control: Fixed, by connection of a fixed-value capacitor bank Automatic, by connection of a different number of steps, allowing adjustment of the reactive energy to the requir...
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Dec 19,2019
Method for determining compensation (Power Factor correction Guidelines) Step 3: Allowance for operating conditions and harmonics Capacitor banks should be selected depending on the working conditions expected during their lifetime. Allowing for operating conditions The operating conditions have a great influence on the life expectancy of capacitors. The following parameters should be taken into a...
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Dec 23,2019
The Graph below shows Harmonic Current Distortion in the form of THDi. This is hovering between 20 and 25%. Ideally, it should be less than 10% and preferably less than 8% THDi. The highest value of average total harmonic distortion (THDi%) across three phases was calculated from raw data. This value is 24.19%THDi and was recorded at time shown. At the same time, average line current (Amps) across...
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Dec 25,2019
We make a simple introduction about harmoincs in networks,welcome to communicate with us about harmonics and how to solve. General Introduction Harmonics are usually defined by two main characteristics: Their amplitude: value of the harmonic voltage or current. Their order: value of their frequency with respect to the fundamental frequency (50 Hz). Under such conditions, the frequency of a 5th ord...
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Dec 28,2019
Reactive power is necessary to generate magnetic fields, e.g. in motors, transformers and generators. This power oscillates between the source and the load and represents an additional loading. Static var Compensator (SVC) and static var generator can suppress the voltage fluctuation, flicker and rapidly compensate the reactive power and the quality of electric power can be improved. If you have q...
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Jan 02,2020
The effects of harmonics on loads The following two types of effects appear in the main equipment: immediate or short-term effects and long-term effects. Immediate or short-term effects: Unwanted tripping of protection devices, Induced interference from LV current systems (remote control, telecommunications), Abnormal vibrations and noise, Damage due to capacitor thermal overload, Faulty operation...
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Jan 10,2020
STATCOM will be utilized in the night for power factor correction and voltage control at the terminals of an induction motor operating at poor power factor. PV solar farms produce power during the day and are completely idle in the nights. The proposed new control on PV solar system will help in increase the utilization of the PV solar system. A key component of the PV solar plant is a voltage sou...
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Feb 01,2020
To our clients, You may have had some good memories about the past one, but you never know what’s the new one is bringing for you. It's time to be hopeful, have new dreams and make some new resolutions for the new year in your life. It's time to connect with each other and make new year wishes. Its time to move on and embrace what’s new. New year means a lot of new dreams and new achievements. Peo...
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Feb 04,2020
Industry background Chemical industry involves many mechanical processes with demanding quality requirements. Before any mechanical smelting, casting, or stamping, an induction melting furnace is used to melt metal. Most induction melting furnaces use a 6-pulse or 12-pulse rectifier, which produces high volumes of harmonic and reactive power. As a result, the production efficiency of induction mel...
read more
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Feb 07,2020
Power Factor Correction The active power produced by the active current can alone be turned into an effective use for the consumer; while the reactive power produced by the reactive current does not yield usable power, and consequently, is not registered on the active performance meter. The reactive power has, however, a negative effect on generators, transformers, and conductor lines, while causi...
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Feb 10,2020
WHAT IS HARMONIC FILTERING? To understand the purpose of harmonic filtering, it helps to understand what harmonics are. The voltage of a standard 50Hz Alternating Current(AC) power supply swings between positive and negative 50 times a second, following a neat sine-wave. Linear AC electrical loads such as heaters or incandescent lights draw a current that follows this same sine-wave. The graph abo...
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Feb 12,2020
A capital investment in power factor correction(STATCOM or SVC) and harmonic filtering equipment can result in a healthy return of investment –depending on the utility’s demand rate structure, production quality cost due to harmonics and voltage fluctuations in the distribution system. ZDDQ Electric power quality correction products are part of the solution. Most utilities charge for peak electric...
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