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Sep 19,2019
Anhui Zhongdian(ZDDQ) Electric Co., Ltd. established in 2001. ZDDQ Technology Park locates in Bengbu City of Anhui Provice. We're a professional and leading manufacture, focus on advanced power quality solutions and power factor correction. APF,SVG,APFC are our main products. ZDDQ have a leading independent R&D team and quality supervision system, and maintain long-term cooperative relations w...
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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 05,2019
What's the Definition of Power Factor? Power Factor Definition: Power factor(PF for short) is the ratio between KW and KVA drawn by an electrical load where the KW is the actual load power and the KVA is the apparent load power. It is a measure of how effectively the current is being converted into useful work output and more particularly is a good indicator of the effect of the load current on th...
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Dec 10,2019
What is Static Var Generator? Static Var Generator (SVG) also known as instantaneous stepless reactive power compensators or active power factor compensators (APFC),are the ultimate solution to power quality problems caused by low power factor and reactive power demand for a wide range of segments and applications. SVG is a high performance, compact, flexible, modular and cost-effectiv...
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Dec 18,2019
Single busbar compensation Overview An installation with a single LV busbar is that most often encountered. This type of installation requires that the reactive power can change with respect to the methods defined previously. Compensation uses all the receiving devices of the installation and the amperage of the current transformer is determined according to the total current conducted through the...
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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 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 04,2020
SVG Principle The principle of the SVG is, when the load is generating inductive or capacitive current, it makes load current lagging or leading the voltage. SVG detects the phase angle difference and generates leading or lagging current into the grid, making the phase angle of current almost the same as that of voltage on the transformer side, which means fundamental power factor is unit. Compare...
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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 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 21,2020
Medium Voltage STATCOM-Dynamic Reactive Compensation -----Providing stability, security, and reliability to the grid Installing a STATCOM at one or more suitable points on the network is a powerful and cost effective method to increase grid transfercapability and enhance voltage stability. What is a STATCOM? A STATCOM (or Static Synchronous Compensator) is a voltage regulating device. It is based ...
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Feb 29,2020
The ubiquity of synchronous generation should not be assumed in highly renewable power systems. Various problems may consequently arise, not least of which are the difficulties entailed in maintaining regional reactive power balance. Offering a potential solution to such problems, modern renewable generator technologies offer controllable reactive power resources. As many of these generators will ...
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Mar 23,2020
Overview of Active Power Filter APF-1000 APF-1000 Active power filter has various compensation modes (harmonic, reactive power, three-phase unbalance and capacitor switching control), which can simultaneously make the said various compensation, and the proportion of compensation capacity by harmonic, reactive power, and three-phase unbalance can also be set, comprehensively solving the problem of ...
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Apr 18,2020
Power quality problems and Industry background Dynamic reactive power, lower power factors, and higher harmonic content are common power quality problems in the CNC industry. Major contamination sources of power quality include the punching machines,welding machines. When harmonics occur, dynamic reactive current and 3-phase imbalance are produced. During the CNC period, the power factor of arc fu...
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Apr 24,2020
Following are simple contrast list, Product Static Var Generator(SVG) Multifunctional electricity controller & optimizer （MEC） Mechanical switch capacitor （MSC） Thyristor-switched capacitor （TSC） Response speed ≤5ms ≤5ms 300ms 20ms Reactive power compensation ability Rated capacitive reactive power to rated inductive reactive power, 0.1kVar precision, and up to 1 power factor Rated capacitive ...
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