Dielectrics and insulators are distinguished primarily by their applications. One of the main differences is that a dielectric can store electrical energy by becoming polarized in an electric field, whereas an insulator resists the flow of electrons to prevent current conduction. Other key differences between them are outlined in the comparison chart below.Definition of DielectricA dielectric material is a type of insulator that contains few or no free electrons. When subjected to an electric fi

Transformers are critical components in power systems, and various failure modes can affect their operation. Timely identification and resolution of these failure modes are essential to prevent costly downtime and ensure system reliability. Below are some common transformer failure modes, along with methods to identify and address them: Insulation FailureIdentification: Insulation failure leads to decreased insulation resistance, which can be detected through insulation resistance testing (megge

Transmission lines and distribution lines are both used to carry electrical power from one location to another. However, they differ significantly in key aspects such as primary function, voltage levels, phase configuration, and conductor placement. These differences are essential for understanding their distinct roles in the power system.The Difference Between Transmission and Distribution Line is given below in the tabulated form.Electricity generation is a critical component of the power syst

Principles of Forced Re-energization of Transmission LinesRegulations for Forced Re-energization of Transmission Lines Correctly select the forced re-energization end of the line. If necessary, change the connection configuration before forced re-energization, taking into account the reduction of short-circuit capacity and its impact on grid stability. There must be a transformer with its neutral point directly grounded on the busbar at the forced re-energization end. Pay attention to the impact

1. OverviewA transmission line fault is a sudden power interruption caused by various factors. To restore supply and prevent recurrence, operators must first locate the fault point, identify the type, determine the cause, and implement repairs.The most common faults include: Lightning strikes Ice buildup (icing) Wind deviation (wind sway) Bird-related issues Pollution flashover External damageUnderstanding these faults and their prevention is critical for grid reliability.2. Lightning Strike Fau

I. What is a Grid Voltage Overvoltage Fault?Grid voltage overvoltage refers to a phenomenon in power systems or circuits where the voltage exceeds the normal operating range.Generally, under power frequency, if the RMS (Root Mean Square) value of the AC voltage rises to more than 10% above the rated value and lasts for more than 1 minute, it can be determined as a grid voltage overvoltage fault.For example, in China’s common 380V three-phase grid system, if the voltage exceeds 418V and persists

1. R&D of New Materials and Equipment & Asset Management1.1 R&D of New Materials and New ComponentsVarious new materials serve as the direct carriers for energy conversion, power transmission, and operation control in new-type power distribution and consumption systems, directly determining operational efficiency, safety, reliability, and system costs. For instance: New conductive materials can reduce energy consumption, addressing issues such as energy shortage and environmental pol

Maintenance of Main and Control Circuits in Low-Voltage Switchgear (Dust Removal); Inspection and Maintenance of Isolators, Circuit Breakers, Contactors, and RelaysI. Preparation and Standards Before Maintenance Pre-Maintenance Preparations: (1) Working Conditions: Scheduled shutdown and power disconnection. (2) Tools and Instruments:Measuring instruments and tools including: insulation resistance tester (megger), clamp meter, multimeter, combination wrenches, voltage tester, electrician pliers,

I. Overview of Solid-State Transformers (SST)A Solid-State Transformer (SST) is an advanced power conversion device that integrates power semiconductors, high-frequency transformers, and control circuits.Compared with traditional transformers, SST supports AC/AC, AC/DC, and DC/DC conversions, and features advantages such as bidirectional power flow, intelligent control, and a compact design.Its main topologies include single-stage, two-stage (with LVDC or HVDC links), and three-stage structures,

The 10kV high-voltage reactive power compensation device is an essential and indispensable component in modern power systems. By providing or absorbing reactive power, it effectively addresses issues such as low power factor, high line losses, and voltage fluctuations caused by reactive power demand, playing a key role in improving the economy, safety, and power quality of grid operation. High-voltage 10kV reactive power compensation is a critical device for ensuring safe and economical grid ope