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May 20,2020
STATCOM STATCOM (Static Synchronous Compensator)continuously provides variable reactive power in response to voltage variations, supporting the stability of the grid. STATCOM operates according to voltage source converter (VSC) principles, combining unique PWM (pulse width modulation) with millisecond switching. STATCOM functions with a very limited need for harmonic filters, contributing to a sma...
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May 26,2020
Power Factor: Power factor correction(Cosφ) Benefits of power factor correction Improves system power factor Reduces network losses Avoid penalty charges from utilities for excessive consumption of reactive power Reduces cost and generates higher revenue for the customer Increases system capacity and saves cost on new installations Improves voltage regulation in the network Increases power availab...
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Jun 06,2020
Overview A New Generation in Power Factor Correction Today's automation equipment benefits us with greater convenience as well as cost savings from higher production efficiency. However, it can also bring significant wave distortion problems to the power grid that can lead to energy loss, increasing costs and many other power quality issues. A clean and efficient power system normally generates a ...
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Jun 12,2020
What is Power Factor? Power factor is a measure of how effectively you are using electricity. Various types of power are at work to provide us with electrical energy. Here is what each one is doing. Working Power – the “true” or “real” power used in all electrical appliances to perform the work of heating, lighting, motion, etc. We express this as kW or kilowatts. Common types of resistive loads a...
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Jun 19,2020
Global compensation Where a load is continuous and stable, global compensation can be applied Principle The capacitor bank is connected to the busbars of the main LV distribution board for the installation, and remains in service during the period of normal load. Advantages The global type of compensation: Reactive current still flows in all conductors of cables leaving (i.e. downstream of) the ma...
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Jun 29,2020
The nature of transformer inductive reactances All previous references have been to shunt connected devices such as those used in normal loads, and power factor correction capacitor banks etc. The reason for this is that shunt connected equipment requires (by far) the largest quantities of reactive energy in power systems; however, series-connected reactances, such as the inductive reactances of p...
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Jul 08,2020
How to calculate Harmonic Filter In power supply systems based on alternating current (AC) -- such as the main power distribution network from electric utilities -- non-linear loads can feed some amount of power back into the wiring. This feedback typically occurs in the form of harmonics: multiples of the frequency of the original AC wave. Harmonics need to be eliminated from a power circuit by a...
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Jul 27,2020
Overview ZD-MCJB Medium voltage automatic power factor controller and protection Unit Our R&D has developed MV automatic power factor controller and protection unit since May 2019, and has intalled in many sites an d has a very good running. Now we introduce our MV auto PF controller and protection unit officially. ZD-MCJB PF controller and protection unit is suitable for automatically adjusti...
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Aug 03,2020
Low Power Factor Operation of Induction Motor Induction Motors finds various applications in industries and household equipments. Such machine requires magnetic fields for its functioning hence, it draws magnetizing current from the source. The magnetizing current is the current that establishes the flux in the air gap of an Induction motor and this is independent of the load on the motor. It is t...
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Sep 15,2020
Leaders in Power Quality Solutions ZDDQ is one of leading manufacturers of power quality solutions from China. Here at ZDDQ we believe in creating and maintaining the highest quality power possible for our customers through an indepth understanding of power usage and electrical efficiencies. We source world’s best components to manufacture custom solutions to reduce maintenance and energy costs. N...
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Sep 24,2020
480V power quality solutions has the best compatibility for low voltage grid(3 phase 4 wire).ZDDQ has full series 480V devices for power quality improvement and power factor correction. 480V Active Power Filter Active Power Filter has various compensation modes (harmonic, reactive power, three-phase unbalance and capacitor switching control), which can simultaneously make the said various compensa...
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Oct 21,2020
Our Indian Clients and African Clients has installed hybrid reactive power compensation system. After our guide, they use ZDDQ SVG mixed with Capapacitor banks based on Contactors and Thyristors. A united system of thyristor switched capacitor (TSC) and static var generator (SVG) was proposed to improve voltage regulation, stability, and power factor in ac transmission and distribution systems. Th...
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Oct 30,2020
Our low voltage Static Var Generator has widely installed in many countries and has a good function and quality performance. In some countries, client use our SVG to compensate reactive power together with their capacitor banks, which is named as hybrid compensation system. In some countries, our SVG are used for power factor correction at the site where the load changes fast and frequently. And s...
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Nov 11,2020
With our best quality of our products and good relationship in the power quality field, we just received an important order for medium voltage capacitor banks. Backgroud. The rated voltage is 10kv. The total capacity is 35.4Mvar. There are individual type capacitor banks, central capacitor banks. Also there are fixed capacitor banks, and mulitipl-step automatic capacitor banks. As we know, STATCOM...
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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 18,2020
Introduction From ZDDQ professional engineers: Power systems are designed to operate at frequencies of 50 or 60Hz. However, certain types of loads produce currents and voltages with frequencies that are integer multiples of the 50 or 60 Hz fundamental frequency. These higher frequencies are a form of electrical pollution known as power system harmonics. Solution ZD-APF(Active Power Filter). This i...
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