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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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Mar 27,2023
In low voltage distribution system, usually two solutions for the power factor correction: capacitor bank and static var generator. Low Voltage Capacitor Bank The load current provided by the grid to the electrical equipment is composed of active current and reactive current. The reactive current is exchanged between the power supply and the load, which greatly occupies the grid, greatly reduces t...
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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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Oct 14,2023
ZDDQ-LV APFC Low voltage reactive power compensation refers to the process of correcting or improving the reactive power in a low voltage electrical system. Reactive power is the power associated with reactive components, such as inductive or capacitive loads, in an alternating current (AC) circuit. In an AC power system, both real power (measured in watts) and reactive power (measured in vo...
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Dec 09,2023
The low-voltage automatic compensation capacitor cabinet produced and developed by ZD DQhas been successfully installed at the customer's site. The customer's problem of low power factor was successfully solved, and the power factor reached 0.95 after compensation. Thanks again to our customers for their trust and support.
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Jan 11,2024
STATCOM (Static Synchronous Compensator) is a power electronic device used in electrical power systems for voltage control and power factor correction. In a solar farm, the main functions of a STATCOM are as follows: Voltage Regulation: Solar farms typically operate at high voltages, and fluctuations in solar irradiation and load demand can cause voltage variations. STATCOMs can regulate the volta...
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Jan 22,2024
n the context of the metallurgical industry, Statcom refers to Static Var Generator(SVG) or Static synchronous Compensator, which is a type of power electronics-based device used for reactive power compensation and voltage control. Statcoms are commonly used in metallurgical processes to improve power quality and stabilize the voltage levels. The primary function of an Statcom in the metallurgical...
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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 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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Mar 25,2024
Static Synchronous Compensator (STATCOM) is a device used in power systems to control voltage and reactive power. In the context of rail transit, STATCOM can serve several purposes: Voltage Regulation: STATCOM can regulate the voltage levels in the rail transit system, ensuring that they remain within acceptable limits. It can compensate for voltage drops or fluctuations caused by various factors ...
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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 13,2024
The improvement of power quality is mainly through power quality equipment and current signal and other parameters in the current transformer detection system, so as to correctly control the power quality problem in real time and improve the environment of the distribution system. For capacitor bank, we usually only use a CT mounted on the power side for sampling. For SVG / APF, a...
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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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Jul 01,2024
STATCOM (Static Synchronous Compensator) is a power electronic device used power systems for voltage control and power factor correction. While Statcom are not directly related to coal mining operations, they can play a role in providing stable and reliable electrical power for mining operations, including coal mines. Coal mines typically require a significant amount of electrical power for variou...
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Jul 01,2024
First of all, the operation of inductive equipment must establish a magnetic field (such as a motor). Since the instantaneous start-up of large equipment requires the power grid to provide a large amount of Reactive Current to establish a magnetic field, the voltage of the system will be greatly reduced at the moment of equipment startup, causing other equipment to be protected or unable to operat...
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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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