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Aug 22,2022
The application of distribution system capacitor banks has long been accepted as a necessary step in the design of distribution feeders. Design considerations often include traditional factors such as voltage support, power factor, and released capacity. However, as customer systems evolve through the use of power electronics, the distribution system design of the future will include power quality...
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Sep 29,2022
The ZDDQ SVG module we exported to Colombia in mid-September has been put into use and installed in an airport power distribution room somewhere in Bogota, and the compensation effect is good. The two modules are: 440V 60Hz 40kvar(50A) SVG Module and 440V 60Hz 80kvar(100A) SVG Module.
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Nov 14,2022
With the continuous development of the market, we have more and more customers in the Middle East market using our APF(Active Power Filter) equipment. Active Power 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-APF active power filter is connected in parallel, to detect th...
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Mar 06,2023
ZDDQ Active Power Filters exported to Thailand. We have been cooperating with this customer for almost 3 years. The quality of our Active Power Filter is stable, the technical and market performance is excellent, the order demand of the customer is stable, and we have formed a relatively good reputation in the market. Thanks for Client's trust and support.Not more than 2 months, this new order is ...
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Mar 17,2023
ZDDQ Active Power Filter Exported to Lebanon. We are ZDDQ, which is a professional designer and top manufacturer of power quality field. And we focus on power quality improvement and power factor correction since 2001. In recent years, our business sector in the Middle East has gradually expanded, and more and more customers choose to use ZDDQ products. The following is a 100A active harmonic filt...
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Aug 23,2023
ZDDQ----Power Quality Issues in the Data Center Industry A large number of modern electrical equipment and devices are used in the data center industry, such as credit card terminal equipment, communication systems, computers, network control equipment, various digital office equipment, lighting control systems, fire protection systems, monitoring systems, etc. A large number of non-linear power l...
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Nov 17,2023
ZDDQ, a professional manufacturer of power factor correction and harmonic mitigation field since 2001. Today let's talk about power factor correction and energy saving. Power factor correction (PFC) is a technique used to improve the power factor of electrical systems. The power factor is a measure of how effectively the current is being converted into useful work in an AC electrical system. A low...
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Feb 19,2024
What is harmonics issues in AC and DC grid? In AC and DC grids, harmonics refer to the presence of frequency components that are integer multiples of the fundamental frequency. Harmonics can be problematic because they can cause various issues such as: Voltage and Current Distortion: Harmonics in the grid can distort the shape of the voltage and current waveforms, resulting in distorted sine waves...
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Mar 07,2024
As a product, electric energy has been widely used at present, and the quality of electric energy is directly related to people's lives and safety. So what is power quality? What does power quality include? 1. What is power quality? Power quality refers to the quality of electric energy in the power system. The ideal electrical energy should be a perfectly symmetrical sine wave. Several factors ca...
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Mar 20,2024
Urban rail transit systems mainly include: subway systems, light rail systems, monorail systems, trams, maglev systems, automatic guide rail systems, and urban rapid rail systems. According to the different nature of electricity consumption, the power supply system of the subway system is mainly divided into two, one is the traction power supply system and the other is the power lighting power sup...
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May 06,2024
What is nonlinear load? A nonlinear load is a load whose current is not proportional to its voltage. Since some electronic components, such as transistors and diodes, exhibit nonlinear characteristics when operating, in actual power consumption, some electrical equipment connected to the load will deform the current waveform. This deformation causes the voltage to distort and generate additional f...
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May 29,2024
Active filters and passive filters are two types of filters that are often used in electronic circuits. Although they can both be used to filter certain frequencies in electrical signals, there are some different differences between them. 1. Working Principle Passive filters mainly rely on passive components (such as capacitors, inductors, resistors, etc.) to filter signals. They can only process ...
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May 30,2024
1. What are the 3rd, 5th, and 7th harmonics? In a normal power system, electrical equipment with linear impedance change characteristics will not affect the power supply with a frequency of 50Hz and a standard sinusoidal waveform when it is working. However, with the development of power electronics technology, there are more and more electrical equipment with nonlinear impedance characteristics (...
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Jun 13,2024
When an oscillating system is subjected to periodic external force, the amplitude of the oscillation increases sharply when the frequency of the external force is the same as or very close to the natural oscillation frequency of the system. The frequency at which resonance occurs is called "resonance frequency". In electrical engineering, the resonance phenomenon of an oscillating circuit. The res...
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Aug 09,2024
690V 3 phase 3 wire networks A 690V 3-phase 3-wire network refers to an electrical power distribution system that operates at 690 volts between each line conductor, without a neutral wire. This type of network is commonly used in industrial and commercial applications where the loads do not require a neutral connection or where power is distributed primarily to large motors, equipment, or machiner...
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Aug 27,2024
Harmonic voltage and harmonic current are common phenomena in power systems, and they have a great impact on power equipment and power grid operation. Harmonics refer to voltage or current components whose frequencies are integer multiples of the fundamental frequency. In power systems, the fundamental frequency is generally 50Hz or 60Hz, so the harmonic frequency is an integer multiple of 50Hz or...
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Sep 05,2024
Application of reactive power compensation device SVG: Power system: SVG can be used for reactive power compensation and voltage regulation of power system to improve the stability and reliability of power grid. It can help power system reduce power loss, improve voltage quality, and improve power factor and efficiency of power grid. Industrial field: SVG can be used for reactive power compensatio...
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Sep 11,2024
Selecting the capacity of the transformer is crucial, as it directly affects the stability, efficiency and safety of the power system. The appropriate transformer capacity can ensure that current and future load requirements are met, avoiding equipment damage and energy waste caused by overload or underload. The correct capacity selection helps optimize operating costs, extend equipment life, and ...
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