Free Expert Guides on Power Systems, Circuit Design & Electrical Troubleshooting

I. Current Status and Existing ProblemsCurrently, water supply companies have extensive networks of water pipelines laid underground across urban and rural areas. Real-time monitoring of pipeline operation data is essential for effective command and control of water production and distribution. As a result, numerous data monitoring stations must be established along the pipelines. However, stable and reliable power sources near these pipelines are rarely available. Even when power is accessible,

Due to the intermittent nature of standalone wind and solar power generation under unfavorable weather conditions such as windless or rainy days, using either technology alone in off-grid remote areas requires large-capacity energy storage equipment to ensure continuous power supply. By effectively integrating solar panels, wind turbines, and batteries, hybrid wind-solar power systems can solve the intermittency issue of single-source generation and provide relatively stable electricity. This te

I. IntroductionThe cabinet structure forms the fundamental basis of low-voltage switchgear, making cabinet manufacturing technology the foundation of all foundations. As a structural enclosure, the cabinet must not only meet the functional integration requirements of various electrical units (such as standardized types, modular combinations, and functional distribution), but also satisfy inherent cabinet requirements (such as robustness, reliability, neat appearance, and ease of adjustment). Due

High-voltage switchgear is a critical electrical device in power systems. Deterioration in switchgear operating conditions is one of the main causes of power system failures. So, what are the common faults in high-voltage switchgear?I.Classification of High-Voltage Switchgear(1) Outdoor and Indoor TypesBased on installation location, high-voltage switchgear can be classified as outdoor or indoor types. Indoor switchgear is commonly used for systems at 10 kV and below. According to primary circui

Long-distance protection of high-voltage transmission lines primarily relies on technologies such as differential protection, distance protection, and automatic reclosing. Together, these technologies effectively ensure safe power transmission and stable grid operation.In the vast power transmission network, high-voltage transmission lines play a crucial role, acting as energy arteries that deliver electricity from power plants to homes and businesses. However, as transmission lines extend over

The working principle of a power plant boiler is to utilize the thermal energy released from fuel combustion to heat feedwater, producing a sufficient quantity of superheated steam that meets specified parameters and quality requirements. The amount of steam produced is known as the boiler's evaporation capacity, typically measured in tons per hour (t/h). Steam parameters primarily refer to pressure and temperature, expressed in megapascals (MPa) and degrees Celsius (°C), respectively. Steam qua

Why Do Electrical Equipment Need a "Bath"?Due to atmospheric pollution, contaminants accumulate on insulating porcelain insulators and posts. During rain, this can lead to pollution flashover, which in severe cases may cause insulation breakdown, resulting in short circuits or grounding faults. Therefore, the insulating parts of substation equipment must be periodically washed with water to prevent flashover and avoid insulation degradation that could lead to equipment failure.Which Equipment Is

Function of Surge ArrestersWhen lightning-induced overvoltage travels along overhead power lines into a substation or other buildings, it can cause flashovers or even puncture the insulation of electrical equipment. Therefore, if a protective device—known as a surge arrester—is connected in parallel at the power inlet of the equipment (as shown in Figure 1), it will immediately activate when the overvoltage reaches the preset operating level.The arrester discharges the excess energy, limiting th

Composition and Working Principle of Photovoltaic (PV) Power Generation SystemsA photovoltaic (PV) power generation system is primarily composed of PV modules, a controller, an inverter, batteries, and other accessories (batteries are not required for grid-connected systems). Based on whether it relies on the public power grid, PV systems are divided into off-grid and grid-connected types. Off-grid systems operate independently without relying on the utility grid. They are equipped with energy-s

Routine Maintenance and Care of Dry-Type Power TransformersDue to their flame-resistant and self-extinguishing properties, high mechanical strength, and ability to withstand large short-circuit currents, dry-type transformers are easy to operate and maintain. However, under poor ventilation conditions, their heat dissipation performance is inferior to that of oil-immersed transformers. Therefore, the key focus in the operation and maintenance of dry-type transformers is controlling the temperatu