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

1. Project OverviewThis project involves the construction of the new Jakarta–Bandung High-Speed Railway, with a mainline length of 142.3 km, including 76.79 km of bridges (54.5%), 16.47 km of tunnels (11.69%), and 47.64 km of embankments (33.81%). Four stations—Halim, Karawang, Padalarang, and Tegal Luar—have been constructed. The Jakarta–Bandung HSR mainline is 142.3 km long, designed for a maximum speed of 350 km/h, with a double-track spacing of 4.6 m, including approximately 83.6 km of balla

On June 11, at the Liuzhou Converter Station of the Wudongde Power Transmission to Guangdong and Guangxi UHV Multi-Terminal Flexible DC Demonstration Project (shortened as the “Kun-Liu-Long DC Project”), the first ±800 kV flexible DC wall bushing independently developed by China Flexible DC Wall Bushing Manufacturer was successfully energized and has been operating stably. The commissioning of this project has drawn significant attention from major mainstream media outlets.The successful operati

Recently, the world’s first 500kV/90kA cost-effective high-voltage AC current limiter, jointly led by Guangzhou Power Supply Bureau of Guangdong Power Grid and developed by China High-Voltage AC Current Limiter Manufacturer, successfully completed artificial short-circuit tests and has been officially connected to the grid for trial operation on the Shunguang Jia Line at the 500kV Guangnan Substation. As a key project under China’s National Key R&D Program, the successful completion of the “

1.Introduction1.1 Basic Function and Background of GCBThe Generator Circuit Breaker (GCB), as the critical node connecting the generator to the step-up transformer, is responsible for interrupting current under both normal and fault conditions. Unlike conventional substation circuit breakers, the GCB directly withstands the massive short-circuit current from the generator, with rated short-circuit breaking currents reaching hundreds of kiloamperes. In large generating units, the reliable operati

The generator circuit breaker is a critical component in power systems, and its reliability directly affects the stable operation of the entire power system. Through research and practical application of intelligent monitoring systems, the real-time operational status of circuit breakers can be monitored, enabling early detection of potential faults and risks, thereby enhancing the overall reliability of the power system.Traditional circuit breaker maintenance primarily relies on periodic inspec

1.Protects the GeneratorWhen asymmetric short circuits occur at the generator outlet or the unit bears unbalanced loads, the GCB can quickly isolate the fault to prevent generator damage. During unbalanced load operation, or internal/external asymmetric short circuits, twice the power frequency eddy current is induced on the rotor surface, causing additional heating in the rotor. Meanwhile, the alternating electromagnetic torque at twice the power frequency induces double-frequency vibration in

Units with a capacity of 300MW and above are usually connected in a generator-transformer unit configuration and connected to the power system through the circuit breaker on the high-voltage side of the transformer. During the normal operation of the unit, the circuit breaker may trip automatically due to various reasons. Operators must make correct judgments and take timely measures to ensure the safe operation of the unit.1. Causes of Automatic Circuit Breaker Tripping Tripping due to relay pr

1. Key Points for Debugging High-Voltage Power Distribution Cabinets in Power Systems1.1 Voltage ControlDuring the debugging of high-voltage power distribution cabinets, voltage and dielectric loss show an inverse relationship. Insufficient detection accuracy and large voltage errors will lead to increased dielectric loss, higher resistance, and leakage. Therefore, it is necessary to strictly control the resistance under low-voltage conditions, analyze current and resistance values, and avoid ex

In power grid construction, we should focus on actual conditions and establish a grid layout suitable for our own needs. We need to minimize power loss in the grid, save social resource investment, and comprehensively improve China's economic benefits. Relevant power supply and electricity departments should also set work goals centered on effectively reducing power loss, respond to energy conservation calls, and build green social and economic benefits for China.1.Current Status of China's Powe

Transformers play an indispensable role in power systems, and almost every electrical device relies on their stable power supply. Sometimes you may find that the transformer's voltage is unstable, or even unbalanced. This phenomenon not only affects the operating efficiency of equipment but also may bring a series of serious safety hazards. What exactly causes transformer voltage imbalance? And how to effectively solve this problem?1.Three-Phase Load ImbalanceThe voltage balance of a transformer