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Dec 02,2023
ZD-GWJ Medium Voltage(3kV~24kV) group automatic reactive power compensation device automatically switches capacitor banks according to the voltage and reactive power of the power supply bus, and performs reactive power compensation by tracking load changes, thereby providing power factor, improving power supply quality, and reducing power consumption. It is often installed in front of the control ...
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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 19,2024
Power Factor Control refers to the management and maintenance of an acceptable power factor in electrical systems. Power factor is the ratio of real power (kW) to apparent power (kVA) in an electrical circuit. A low power factor indicates that the circuit is inefficient and requires more current to deliver a given amount of power. This results in increased energy losses, higher electricity bills, ...
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Jan 29,2024
To build a capacitor bank panel, you will need to follow these general steps: Determine the capacitor bank size: Calculate the required capacitance based on the power factor correction needs of your system. Consider factors such as the target power factor, load characteristics, and voltage levels. Select capacitors: Choose high-quality capacitors that are suitable for the desired voltage and curre...
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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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Apr 03,2024
Power factor is an important technical indicator of the power system. It represents the ratio of active power to apparent power in an AC circuit. This ratio is usually expressed as a cosine function (cosφ). The size of the power factor reflects the energy utilization efficiency of the power supply output. If the power factor is too high, that is, the reactive power is too low, it will reduce the r...
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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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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 09,2024
In the power system, the on-site compensation of high-voltage motors should be invested when the voltage drops by more than 10%. 1. The role of on-site compensation of high-voltage motors The on-site compensation of high-voltage motors can effectively improve the power factor of the power system, reduce line losses, ensure the stable operation of the system voltage, and reduce energy consumption a...
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Jul 29,2024
The preventive measures for the capacity attenuation of power capacitors are crucial in the application of power capacitor banks. Here are some of the main preventive measures: Control operating conditions: Temperature control: Ensure that the capacitor operates within the temperature range recommended by the manufacturer. Excessive temperature will accelerate the aging of the internal materials o...
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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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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 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...
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Sep 28,2024
The low-voltage power distribution system consists of a distribution substation (usually reducing the transmission voltage of the power grid to the distribution voltage), a high-voltage distribution line (i.e., a voltage above 1 kV), a distribution transformer, a low-voltage distribution line (a voltage below 1 kV), and corresponding control and protection equipment. Generally includes: Main equip...
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Oct 08,2024
Static Var Generator (SVG) modules and panels are essential components in reactive power compensation systems, designed to improve power quality and stabilize voltage in electrical networks. Here's an overview of both: 1. SVG Modules Function: These are the core components responsible for providing dynamic reactive power compensation by injecting or absorbing reactive power in response to varying ...
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Oct 14,2024
Low-voltage capacitor cabinets are electrical equipment used in power systems. Their main function is to compensate the power factor of the power system and improve the power supply quality of the system. When installing low-voltage capacitor cabinets, the following aspects need to be noted: Installation location selection: Low-voltage capacitor cabinets should be installed in ventilated, dry, non...
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