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Nov 25,2019
Manufacture of power quality solutions,ZDDQ ensuring stronger, smarter and greener grids Power quality is a major concern for transmission and distribution utilities, industries, and transport and infrastructure sectors. Poor power quality affects grid reliability, productivity, leads to higher operating costs and penalties for non-compliance with grid codes. ZDDQ is a technology leader with a wid...
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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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Dec 05,2019
Typical non-linear loads We will be focusing on the six pulse rectifier bridge. The 3 phase rectifier has a key role to play because a significant portion of the electrical energy is drawn from loads with this type of front-end circuit. One typical application that can be mentioned is the variable speed motor drive, which has been used for years with high growth rates in almost every industrial se...
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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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Jan 16,2020
There are a couple of principles to achieve reactive power compensation. The simplest solution is without any doubts a combination of switched passive elements, i.e. switched capacitors and inductors. Figure 1 shows qualitatively the reactive current versus connected voltage of such a solution. The reactive current depends linearly on the grid voltage and as a consequence the reactive power change...
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Jan 19,2020
A changing electrical network brings new power quality issues. Today the way we generate, use, and control our energy is changing. New and renewable generation and distribution technology is becoming common, and combined with more dynamic and complex load profiles, there are more challenges faced by the network and energy users to provide high power quality. A new way to improve your power quality...
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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 18,2020
How much can be saved? Ultimately the level of energy saving achieved will be dictated by a combination of the incoming supply voltage level and the types of electrical equipment in use. The higher the supply voltage, the greater the potential to make energy savings. However different types of electrical equipment deliver different levels of energy saving for the same reduction in voltage. Voltage...
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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 25,2020
ZDDQ has come back to factory and start to work Since Feb.18th. The factory will carry out the strict measures to maintain the normal production to meet clients' orders. In 2020, we will focus on low voltage and medium voltage power qualit improvement and power factor correction. In low voltage field, we will push on R&D of Active power filter, and provide perfect service for clients.We have b...
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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 11,2020
Product Description ZDDQ Medium Voltage Metal Enclosed Capacitor and Harmonic Filter Banks are designed for industrial, commercial, and utility power systems requiring medium voltage automatic power factor correction. Standard designs are available for placement in outdoor or indoor substations (an enclosure integrity option can be added to allow for placement in publicly accessible areas) for pow...
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Apr 13,2020
Voltage Sag Voltage sag is the main problem to cause the losses of industrial production. Unpredictable outage rarely happen in many high automated process control industries. who have the good power supplies. Voltage Sag is mostly caused by thunder,but it also has other reasons. Power system cause: starting of heavy machine and short circuit fault. Unpredictable accident:traffic accident,construc...
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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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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 17,2020
Problem High Electricity Bills in Steel Factory. Analysis To analyze the power quality at Steels Factory and to understand the Voltage, Current, Power Factor, Active power,Reactive power, Apparent power, THD profile and to suggest the required solution to improve Power Factor, to qualify for Utility PF incentive. Towards fulfilling the need, fixed Capacitor bank of 2400KVAr has been installed at 1...
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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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Sep 08,2020
Leading Provider of Technology One of the Leading Static Var Generator manufacturing base in China Exclusive to +/-100Mvar Statcom R&D manufacture Advanced and strong R&D center Patents Owner Based on IGBT National Industry standards drafters CE Certificate 101 national patens 1 national science and technology invention award Advanced Technologies Perfect Auto-diagnosis at Starting Stage D...
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