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A wide variety of distribution cabinets

Distribution panels can be categorized in various ways based on different standards, primarily by voltage level, structural features, installation method, and location. 1. By Voltage Level: • Low-voltage distribution panels: Typically refers to distribution panels rated at 1 kV or below, used to ... Read More

Do you know short circuit impedance?

Short-circuit impedance is a critical parameter of electrical equipment such as power transformers and reactors. It characterizes the impedance characteristics of the equipment under short-circuit conditions and is crucial for equipment operation, protection design, and grid stability analysis. C... Read More

Do you know the power supply radius of the transformer?

The power supply radius of a transformer refers to the distance from the transformer to the farthest power-consuming device. It is affected by several factors, including voltage level, cable type, load size, and voltage quality requirements. Generally speaking, the low-voltage power supply radius... Read More

Compensation application of low voltage active filter cabinet in power system

Active power filters are primarily used to dynamically filter harmonics and compensate for reactive power, improving power quality and equipment reliability. They detect and compensate for harmonic currents in real time, making the current injected into the grid closer to a sine wave, thereby red... Read More

SF6 gas insulated ring main unit

GIS (Gas Insulated Switchgear) is a high-voltage switchgear that uses SF₆ gas as the insulating medium. It seals components such as circuit breakers, disconnectors, earthing switches, transformers, lightning arresters, and busbars within a grounded metal casing, achieving compact and reliable pow... Read More

The structure and classification of transformer oil conservator

As the volume of transformer oil expands or decreases with temperature, the oil conservator regulates the oil level, ensuring the transformer tank is always full. Without an oil conservator, fluctuations in the oil level within the tank can have several negative consequences:   First, when ... Read More

Main components of transformer voltage regulation–tansformer tap changer

Transformer tap changer Transformer voltage regulation is to set a tap on a certain winding of the transformer. When the tap is changed, a part of the wire turns is reduced or increased, so that the number of turns of the transformer winding with the tap is reduced or increased, and the number of... Read More

Do you know about the principle and structure of transformer windings?

The winding is the most basic component of the transformer. Together with the core, it is called the power transformer body. It is the circuit part that establishes the magnetic field and transmits electrical energy. The power transformer winding consists of high-voltage winding, low-voltage wind... Read More

The structure and use of transformer core，Which ones do you know?

Single-phase two-column laminated core The core sheets are stacked in an overlapping manner, and the two columns are covered with coils, which are led out by series and parallel connecting lines. The structure is simple and compact, with less process equipment, but the stacking workload is large.... Read More

Why is the hydropower project in the lower reaches of the Yarlung Zangbo River so important?

The construction of the lower reaches of the Yarlung Zangbo River hydropower project started on July 19, 2025 in Linzhi City, Tibet, with a total investment of about 1.2 trillion yuan. This project is not only a core project of China’s “14th Five-Year Plan” energy strategy, but ... Read More

Europe is in the midst of a high temperature crisis, and China’s Xinjiang UHV is going crazy!

On July 13, 2025, the Xinjiang Tarim Basin 750KV power transmission and transformation project was fully connected.     I. Project Overview and Technological Breakthroughs 1. Scale and Coverage The total line length is 4,197 kilometers, forming a closed-loop power grid around the Tarim... Read More

China’s national unified electricity market breakthrough: cross-regional trading mechanism implemented

1. Cross-operating area trading mechanism approved The National Development and Reform Commission and the Energy Bureau of China approved the “Cross-grid operating area normalized power trading mechanism plan”, realizing the rule connection between the State Grid and the Southern Powe... Read More
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