With the increasing complexity of power system operation environment and the deepening of power system reform, traditional power grids are accelerating the transformation to smart grids. The goal of equipment condition-based maintenance is achieved through real-time perception of equipment status by new sensors, reliable communication via modern network technology, and effective monitoring by background expert systems.I. Analysis of Condition-based Maintenance StrategyCondition-based Maintenance

With the accelerated automation of power equipment, various medium-voltage switchgear have emerged in the market. Classified by insulation media, they are mainly divided into air-insulated, SF₆ gas-insulated and solid-insulated types, each with its own advantages and disadvantages: solid insulation offers good performance but poor environmental friendliness, SF₆ features excellent arc extinguishing capability but is a greenhouse gas, and air insulation has high cost-performance but larger volume

As an expert who has been deeply engaged in the field of power system design for many years, I have always paid attention to the technological evolution and application practice of medium-voltage ring main distribution equipment. As a core electrical device in the secondary distribution link of the power system, the design and performance of such equipment are directly related to the safe and stable operation of the power supply network. The following is a professional analysis of the key design

1. Statistics on Common Faults of Medium-Voltage Switchgear in the Early Operation StageAs project participants, we found during the early operation of a new metro line: 21 sets of power supply equipment were put into use, with a total of 266 accident phenomena in the first year. Among them, 77 faults occurred in medium-voltage switchgear, accounting for 28.9%—significantly higher than faults in other equipment. Statistical analysis shows that major fault types include: protection device s

Due to the long service life and severe aging of the equipment, the switches in the 6kV working section of Unit 6 of a certain power plant have potential safety hazards such as deformed locating pins, abnormal closing positions of the earthing switches, and malfunctions of the protection devices. These hazards have threatened the stable operation of the unit, making the transformation extremely urgent. Meanwhile, considering the recent cases of electric shock casualties involving medium-voltage

As a professional engaged in power system operations, I recognize that medium-voltage (MV) switchgear plays a pivotal role in power distribution, metering, and protection. Ensuring its operational safety and reliability is critical—any malfunction can severely disrupt the entire power system. To enhance reliability, we must prioritize design-level optimizations, enabling MV switchgear to fulfill its functions and safeguard grid stability.1. Definition of Medium-Voltage SwitchgearIn my prac

1. IntroductionHigh-voltage disconnect switches play a pivotal role in ensuring the safe and efficient operation of power grid infrastructure. Among various voltage-class switches, 126kV high-voltage disconnect switches are widely applied in medium-to-high voltage grids. In a country like Indonesia, with its vast territory and diverse geographical and climatic conditions, ensuring the reliable operation of power grid equipment is of great significance. The insulation performance of high-voltage

High-voltage disconnect switches (HVDs) are critical switching devices in power grids, primarily used to isolate power sources in conjunction with circuit breakers. With the proposal of "digital grids," continuous advancements in high-voltage switchgear technology, and the expansion of China's power grid, HVD applications have surged in both quantity and diversity. The electric operating mechanism, a vital component controlling HVD switching movements, demands exceptional reliability and stabili

1. IntroductionHigh voltage disconnect switches, particularly those rated at 145kV, play a critical role in Southeast Asia's power infrastructure. These switches are essential for isolating electrical equipment during maintenance, ensuring personnel safety and grid stability. Selecting appropriate 145kV high voltage disconnect switches (HVDs) is a complex task, requiring comprehensive consideration of multiple factors to meet the specific demands of the region's power systems.2. Overview of High

High-voltage disconnect switches are widely used in thermal power plants and are one of the important devices to ensure the stable operation of the power system in thermal power plants. They are mainly composed of moving and static contact components, switch bases, transmission mechanisms, operating mechanisms, porcelain insulators and porcelain insulator bases. During the maintenance of electrical equipment, high-voltage disconnect switches can disconnect the electrical equipment from the power