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Nov 23,2020
ZDDQ Static Var Generator SVG and Active Power Filter APF adopt dual interface of Current Transformer,which has great to facilitate new project design and adaptation to old projects. Our SVG and APF can accurately calculate the load harmonic current data and provide perfect compensation effect. For following sites, Both single module or multiple modules in parallel, Multiple active filter/SVGcabin...
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Nov 30,2020
Relations between Reactive power,power factor and penalty Power Factor penalty is spelled out in the contract between the Power Company and Industrial or Commercial customer with large three phase loads. If the contract calls for 85% Power Factor, once the customer’s power factor falls below 85%, the Power Company bills the Customer according to the agreed penalty rates. Industrial loads are mostl...
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Dec 09,2020
The static var generator (SVG) with appropriate control method is a good solution to solve the problem of reactive power impact and harmonic pollution which is generated by the nonlinear load. A control strategy using active current separation and the current indirect control is used for SVG. The active current separation is a method for detecting the harmonic and reactive current, and then the su...
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Dec 22,2020
SVG: Static Var Generator ANHUI ZHONGDIAN ELECTRIC CO., LTD. static var generator is a static electrical device/equipment/system that draws controlled capacitive or inductive current from the electrical power system and thereby generates or absorbs reactive power. Permanently connected and switchable reactor and capacitor banks have been always used in AC power systems to ensure desirable voltages...
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Jan 05,2021
Power factor correction capacitor banks and harmonic filters. Power factor correction capacitors and harmonic filters are an essential part of modern electric power systems. Power factor correction capacitors are the simplest and most economical means of increasing the capacity of any power system, minimizing energy losses and correcting load power factor. In addition, power factor penalties can b...
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Jan 05,2021
Research A recent ZDDQ survey shows that the global static VAR generator market is projected to grow remarkably owing to the persistent demand for stable power supply from the consumers. Knowing from Fortune Business Insights, in an upcoming report, titled, “Static VAR Generator“ Market Size, Share & Industry Analysis, By Type (Thyristor Based, MCR Based), By End-User (Electric Utility, Renewa...
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Jan 21,2021
ZDDQ Engineers give an example for reference, An Alternator is supplying a load of 650 kW at Power factor 0.65. What size of Capacitor banks (kVAR) is required to raise the Power Factor to unity (1 or >0.95)? And how many more kW can the alternator supply for the same kVA loading when P.F improved. Supplying kW = 650 kW Original P.F = Cosθ1 = 0.65 Final P.F = Cosθ2 = 1 θ1 = Cos-1 = (0.65) = 49°...
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Feb 18,2021
To all clients and friends, 2021 is Chinese Niu Year and Happy Chinese New Year. Best wishes to all our friends and clients from all over the world. Happy new year 2021 wishes for friends families. Warmest thoughts and best wishes for a Happy New Year. May peace, love, and prosperity follow you always. We have resume work On Feb 18th. Going on supporting power quality solutions Low voltage capacit...
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Mar 04,2021
ZDDQ Active Harmonic Filter Active Harmonic 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-4 active harmonic filter is connected in parallel in 380V~456V power grid, to detect the harmonic wave in power grid in real time, generate the reverse-phase compensation current through the co...
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Mar 11,2021
Basic Datas of Harmonics and VFD Harmonic Distortion Harmonic Distortin is a measure of the amount of deviation from a pure sinusoidal wave form that can be caused by a non-linear load (a VFD is considered a non-linear load because it only draws current from the power line as required). Distorted Waveform Distorted Waveform = fundamental (50Hz sinusoidal waveform) + multiples of the fundamental fr...
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Mar 19,2021
Problems of Line Side Harmonics The two main line side harmonic concerns are the problems caused in the facility where they are being generated and the degree of harmonic infection passed to neighboring facilities. The degree of impact for either area depends on the number, size and frequency of use of all linear and non-linear loads . Mainly introduce harmoncs within a facility here. Within a fac...
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Mar 26,2021
Congratulations to the company for mentioning the new car Anhui Zhongdian Electric Co., Ltd., founded in 1988, is affiliated to the Design and Research Institute of the Ministry of Machinery Industry. It is a high-tech professional engaged in the R&D, production, sales and service of power quality equipment technology companies. The company passed the ISO9000 quality system certification in 20...
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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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May 13,2021
The climate is changing - but are you? Changes in the way you live your life - both big and small - can help you reduce your own personal carbon footprint, and also encourage policy makers to act for the good of the planet. Below is a list of several easy things you can do right now to help fight climate change. The greatest threat faced by this generation is climate change. Because without a habi...
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Jun 24,2021
As an inexpensive source of reactive power, capacitor banks bring many benefits to a facility. They are widely deployed to avoid penalties on utility bills, lower distribution losses, increase transformer/Genset capacity, maintain nominal voltage, and to reduce energy losses resulting in decreased carbon emissions. When coupled with reactors, capacitor banks can filter harmonics generated by...
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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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Aug 24,2021
Why does the power factor need to be corrected at MV? Reactive power compensation is essential for the correct technical and economical management of an MV Networks. Its benefits are: Economic benefits — Reduced billable reactive energy costs (surcharges by country and tariff) — Reduced hidden economic cost from the Joule effect in transport lines — Enables a better use ratio (kW/kVA) for installa...
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Sep 13,2021
Benefits by installing power factor correction systems? Power factor correction systems provide much benefit: Reduced electricity utility bills Your electric utility provides working (kW) and reactive power (kVAR) to your plant in the form of apparent power (kVA). While reactive power (kVAR) doesn’t register on kW demand or kW hour meters, the utility’s transmission and distribution system must be...
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