PoE Power Standards and Technical Parameters

Technical overview of PoE power delivery covering PSE/PD roles, detection/classification, wiring alternatives (A/B), pair polarity and four-pair IEEE 802.3bt.

10kV Switchgear Control and Protection

Overview of 10 kV switchgear components and troubleshooting, covering isolating switches, vacuum circuit breakers, protection relays, insulation and mechanical faults.

Calculating Voltage Drop in Power Transmission

Explains voltage drop in power systems, factors like resistance, inductance, length and temperature, and methods to calculate voltage drop in transmission systems.

Power Room Shutdown and Re-energization Sequence

Step-by-step shutdown and re-energization procedures for distribution switchgear, specifying low-voltage vs high-voltage isolation order, circuit breaker operations and fault recovery.

Inverter Islanding: Causes and Protection Measures

Explains inverter islanding: causes, safety risks, and suppression methods including anti-islanding standards, detection devices, protection settings and maintenance.

Differences Between Smart Grids and Traditional Grids

Compare smart grid and traditional grid: definitions, architecture, reliability, efficiency, and integration of distributed generation and renewable energy.

Grid Harmonics and Power Quality Effects

Technical overview of grid harmonics: definitions, causes, key terms and THDu limits under China's standard GB/T 14549-1993 for power quality assessment.

Smart Grid Features, Architecture and Key Advantages

Smart grid overview of architecture, components and functions, highlighting energy efficiency, reliability, adaptive control, IoT/5G communications and renewable integration.

Smart Grid Devices and Components

Technical overview of smart grid architecture and devices, covering intelligent substations, smart meters, smart terminals, energy storage systems, and smart EV charging.

Structure and Working Principle of Smart Electricity Meters

Technical overview of smart electricity meters: architecture and metering module operation with energy metering IC, plus communication, security, storage, clock and power modules.