-
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 ...
read more
-
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...
read more
-
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...
read more
-
Jan 12,2024
A power quality solution refers to a set of measures and technologies implemented to address issues related to the quality of electrical power. These solutions are designed to mitigate power disturbances and improve the overall reliability and efficiency of the electrical system. Power quality issues can result in voltage fluctuations, harmonics, voltage sags and swells, flickering lights, and oth...
read more
-
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...
read more
-
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...
read more
-
Mar 25,2024
Photovoltaic power generation, as a new and pollution-free power generation method today, has greatly alleviated the demand for traditional electric energy. However, for the grid-connected photovoltaic power generation system, due to its inherent randomness, volatility, and intermittent characteristics, and the grid-connected photovoltaic power generation system contains a large number of nonlinea...
read more
-
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...
read more
-
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 ...
read more
-
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 (...
read more
-
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...
read more
-
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...
read more
-
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...
read more
-
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...
read more
-
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...
read more
-
Sep 24,2024
What is the reason of resonance in power networks? Resonance in power networks occurs when the inductive and capacitive elements of the system interact in a way that amplifies specific frequencies, leading to excessive voltage or current oscillations. Here are the primary reasons for resonance in power networks: 1. Impedance Matching Resonant Frequency: Every electrical circuit has a natural reson...
read more
-
Nov 04,2024
Inverters are a type of power electronic device widely used in industrial automation. They adjust the speed of motors by changing the frequency and amplitude of the motor input voltage. Although inverters improve energy efficiency and control performance, they generate harmonics during operation, which have an adverse effect on power grids and equipment. Understanding the causes and principles of ...
read more
