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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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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 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...
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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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Feb 26,2024
Why adjust the power factor of a generator? 1. When the generator is running, the power factor is too high, that is, the reactive power is too low, which reduces the reactive power margin of the system and affects the steady-state stability of the generator. Although the economy is improved, in the long run, this is in exchange for an increased probability of accidents. Once an accident occurs, th...
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Feb 26,2024
A Static Synchronous Compensator (STATCOM) is a power electronic device used for voltage control and reactive power compensation in electrical power systems. It is typically connected to the grid and is capable of injecting or absorbing reactive power to regulate the system voltage. The control of voltage by a STATCOM is primarily achieved by manipulating its reactive power output. Here's a basic ...
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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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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...
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Apr 01,2024
Energy storage has significant potential and offers several opportunities in various sectors. Here are some key chances associated with energy storage: Renewable Energy Integration: Energy storage can facilitate the integration of renewable energy sources like solar and wind power by storing excess electricity generated during periods of high production and supplying it during times of low product...
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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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Apr 17,2024
1. What is reactive power? In the operation of the power grid, due to the existence of current and voltage, there is not only active power but also reactive power in the power system. Active power is the part of electrical energy that is directly converted into efficiency, such as the process in which electrical energy driving motors, heaters and other loads is converted into mechanical energy and...
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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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