Voltage Source Converter (VSC): The heart of the ASVG is the VSC, which consists of high-power semiconductor devices such as Insulated Gate Bipolar Transistors (IGBTs).
The VSC converts electrical energy from the DC link into AC voltage that can be injected into the grid.
DC Link: The DC link serves as an energy reservoir, providing the necessary energy for the VSC to generate and absorb reactive power. Energy is stored in capacitors and is readily available for rapid control actions.
Control System: ASVGs rely on sophisticated control algorithms and digital signal processors (DSPs) to continuously monitor the grid's voltage and current conditions. The control system adjusts the output of the VSC to maintain the desired grid parameters.
Key specifications and features of ASVGs include:
Voltage Regulation: ASVGs are capable of dynamically adjusting their output voltage to maintain grid voltage within acceptable limits, even during rapid changes in load conditions or disturbances.
Reactive Power Compensation: ASVGs can both generate and absorb reactive power as needed.
They provide capacitive or inductive support to improve the power factor and minimize voltage drops.
Fast Response Time: These devices can respond to grid disturbances within milliseconds, making them highly effective in mitigating voltage sags and swells.
Modular Design: ASVGs are often designed with modular configurations, allowing for scalability and easy integration into existing power systems.
Harmonic Filtering: Many ASVGs incorporate harmonic filters to mitigate the adverse effects of harmonics on the grid and ensure compliance with power quality standards.
Communication and Monitoring: ASVGs are typically equipped with communication interfaces, enabling remote monitoring and control. This facilitates coordination with other grid assets and enhances overall grid stability.
Efficiency: ASVGs are designed for high efficiency, minimizing energy losses during operation.
