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Substations are an indispensable part of the power system, and their main functions include voltage conversion, power distribution, grid control, and safety protection. Whether for household lighting, factory production, or urban operations, stable electricity supply depends on substations. This article explains the main functions of substations, their significance in the power grid, and the influence… Continue reading Are Substations Really That Powerful?

A substation is a facility in the power system that is used to convert voltage, distribute electricity, and control current, which helps achieve stable power supply and long distance power transmission. Different types of substations are suitable for urban construction, industrial production, and renewable energy projects. This article introduces the features, application scenarios, and selection… Continue reading What Types of Substations Are There?

Alternating current (AC) and direct current (DC) are two commonly used forms of electrical energy in power transmission systems. AC is suitable for large power grids and regional distribution, while DC is often used in long-distance, high-capacity, and special-purpose transmission projects. AC systems have advantages in cost and scalability, especially for large power grids. DC… Continue reading What Are the Differences Between AC and DC in Power Transmission Technology?

Substation DC power supplies are an integral part of power systems, which are mainly used for relay protection, circuit breaker operation, automation control, and emergency power supply. Compared with AC power supplies, DC power supplies provide more stable and reliable power output and can continue supplying power when AC systems experience faults or outages. This… Continue reading Why Do Substations Use DC Power Supplies?

SF₆ Gas Insulated Switchgear (GIS) encloses key components — circuit breakers, disconnectors, grounding switches, and busbars — inside a grounded metal housing filled with SF₆ gas. This sealed structure delivers high insulation strength, compact footprint, and strong environmental resistance, making GIS the preferred choice for urban substations, underground installations, and sites with challenging environmental conditions. Built… Continue reading What Is SF₆Gas Insulated Switchgear (GIS)?

A substation is a facility in the power system that is used for voltage conversion and power distribution, which helps supply stable electricity to cities, factories, and residential areas. Many people who plan to buy a house worry about whether living near a substation may cause radiation exposure, safety concerns, or health risks. In fact,… Continue reading Is It Safe to Live Near a Substation?

A substation is one of the main parts of a power system that is used to step up, step down, distribute, and control electrical energy so that electricity can be delivered safely and steadily to cities, factories, and homes. Whether people use electricity for daily lighting or industrial production, substations support the entire power supply… Continue reading What Is a Substation?

Substations are facilities in power systems that are used for voltage conversion and power distribution, and they support urban electricity supply, industrial operations, and daily residential power usage. During operation, substations do generate power frequency electromagnetic fields, although their intensity is usually controlled under strict national standards, which means that they normally do not cause… Continue reading Do Substations Emit Electromagnetic Radiation?

A Ring Main Unit (RMU) is a key building block in modern medium-voltage distribution networks, enabling reliable power supply, fast fault isolation, and flexible network operation. Designed for compact installation and high operational safety, RMUs are widely used across urban infrastructure, industrial facilities, and critical power systems. What is a Ring Main Unit (RMU)? Power… Continue reading What You Need to Know About Ring Main Units?

A Ring Main Unit (RMU) is one of the most critical components in modern medium-voltage distribution systems. It controls power flow, isolates faults quickly, and keeps the rest of the network running — all within a compact, sealed enclosure. This guide breaks down how RMUs work, what makes them different, and where they are used. Principles… Continue reading How Does a Ring Main Unit (RMU) Function in Electrical Distribution Systems?

In power system projects, the choice of switchgear affects system operation, land use, construction timeline, and long term maintenance. The two main types in use today are Air Insulated Switchgear (AIS) and Gas Insulated Switchgear (GIS). With urban density increasing and grid structures becoming more complex, the comparison between AIS and GIS has moved beyond a simple technical… Continue reading AIS or GIS: Which Switchgear Is Right for Your Project?

Air Insulated Switchgear (AIS) uses air as its insulating medium to control, protect, and distribute electrical energy in medium and high voltage power systems. With a long track record in substations worldwide, AIS remains one of the most widely adopted switchgear solutions — valued for its straightforward structure, lower initial cost, and ease of maintenance. How… Continue reading What Is Air Insulated Switchgear (AIS)?