-
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...
read more
-
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...
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
-
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...
read more
-
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...
read more
-
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...
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 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...
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
-
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
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...
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
-
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...
read more
-
Jul 16,2024
STATCOM and Voltage Flicker Mitigation What is votlage flicker? Voltage flicker refers to the rapid and repeated fluctuations in the voltage level of a power supply, which can cause noticeable changes in the intensity of lighting and can affect the performance of other electrical equipment. These fluctuations can be annoying and may lead to operational issues in sensitive equipment Causes of Volta...
read more
-
Jul 22,2024
Statcom, Current sampling and voltage sampling Current and Voltage Sampling in STATCOM Static Synchronous Compensator (STATCOM) is a device used for dynamic reactive power compensation and voltage stabilization in power systems. Accurate current and voltage sampling are crucial for the proper functioning of STATCOM, ensuring it provides the necessary reactive power compensation and voltage regulat...
read more
-
Jul 23,2024
UPS and Energy Storage Technology are two different power systems. Their main differences lie in their working principles, application scenarios, and energy storage methods. The main working principle of UPS is to convert the input AC power into DC power through power conversion circuits and batteries and other devices, and then convert it back to AC output through inverters. When the input power ...
read more
-
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...
read more
