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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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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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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
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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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 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...
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Aug 28,2024
Medium voltage power factor correction Medium Voltage Power Factor Correction (MV PFC) involves the application of devices and systems designed to improve the power factor in medium voltage electrical networks, typically in the range of 1 kV to 35 kV. Power factor correction at medium voltage is crucial for enhancing the efficiency of electrical power distribution, reducing losses, and avoiding pe...
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Sep 02,2024
Dynamic reactive power compensation Dynamic Reactive Compensation refers to the real-time adjustment of reactive power in an electrical system to maintain optimal voltage levels, improve power factor, and enhance overall power quality. It is essential in modern power systems, particularly in environments where loads fluctuate rapidly or where maintaining a stable voltage is critical. 1. Understand...
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Sep 11,2024
Selecting the capacity of the transformer is crucial, as it directly affects the stability, efficiency and safety of the power system. The appropriate transformer capacity can ensure that current and future load requirements are met, avoiding equipment damage and energy waste caused by overload or underload. The correct capacity selection helps optimize operating costs, extend equipment life, and ...
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Oct 27,2024
Active Load Balancer and Active Power Filter Active Load Balancers and Active Power Filters (APFs) are both power quality devices, yet they serve different roles within electrical networks. Here’s an overview of each, along with their similarities and distinctions: Active Load Balancer Function: Primarily used to ensure balanced loading across all three phases in a power system. Operation: Activel...
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Nov 13,2024
In the power supply system, reactive power compensation can improve the power factor of the power grid, reduce the loss of power transformers and transmission lines, and improve the power supply environment. Reasonable selection of compensation devices can minimize the loss of the power grid and improve the quality of the power grid. If the selection or use is improper, it may cause many problems ...
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Nov 19,2024
Whether the motor needs on-site compensation depends mainly on its capacity and the grid conditions. When the motor capacity is large and the grid voltage fluctuates greatly, it is recommended to use on-site compensation. On-site compensation can improve motor efficiency and stability and reduce energy waste. As an important equipment in industrial production and daily life, the operating efficien...
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Dec 17,2024
With the continuous advancement of science and technology, medical technology has been significantly improved, and advanced medical equipment continues to emerge, greatly improving the quality of medical services. However, the use of nonlinear devices in hospital power distribution systems may produce harmonic currents that can interfere with the normal operation of the system. The accumulation of...
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Feb 19,2025
In modern power systems, low-voltage capacitor cabinets, as an important reactive power compensation device, play an indispensable role. It can effectively improve the power factor of the power system, reduce line losses, improve the quality of power, and ensure the stable operation of the power system. Ⅰ. Working principle The low-voltage capacitor cabinet mainly realizes reactive power compensat...
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Mar 01,2025
I. Industry driving factors 1. Demand for new energy power generation and grid upgrades The volatility and intermittency of new energy power generation (such as wind power and photovoltaic power generation) put forward higher requirements for grid stability, and it is necessary to rely on power quality equipment (such as reactive power compensation and harmonic control) to achieve grid stability....
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Mar 14,2025
SVG low-voltage static reactive generator is mainly composed of control part, power part and starting part. The following is its detailed internal structure and working principle: Internal structure 1. Control part: mainly composed of computer, control board, sampling board, drive board, etc. The sampling board collects the voltage, current and other parameters of the power grid in real time. The ...
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Mar 25,2025
Low-voltage static VAR generator (SVG) and low-voltage capacitor cabinet are both devices used for reactive power compensation, but there are many differences in working principle, performance characteristics, application scenarios, etc., as follows: Working principle Low-voltage SVG: Based on power electronics technology, by controlling power devices such as IGBT, the DC side electric energy is c...
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