In the heart of Shanghai, researchers are pioneering a control strategy that could revolutionize the way we harness and utilize solar energy in independent microgrids. Jiong Chen, a leading figure from the School of Electrical Engineering at Shanghai University of Electric Power, has developed a novel approach to enhance the robustness and dynamic performance of microgrids powered by photovoltaic (PV) energy storage systems.
The volatility and uncertainties inherent in solar energy have long been a challenge for microgrid operators. Chen’s research, published in a recent issue of Zhongguo dianli (which translates to “China Electric Power”), addresses these issues head-on. “The key is to ensure that the system can handle various disturbances while maintaining optimal performance,” Chen explains. His solution lies in a control strategy based on sliding mode control, a technique known for its ability to handle uncertainties and disturbances effectively.
One of the standout features of Chen’s work is the use of a non-singular fast terminal sliding mode control (NFTSMC) combined with a front DC/DC converter. This innovative approach implements the incremental conductance method (InC) to boost the maximum power point tracking (MPPT) performance. By adjusting the photovoltaic output voltage to track the reference voltage, the system can extract the maximum possible power from the solar panels, even under fluctuating solar irradiation.
But Chen’s innovations don’t stop at MPPT. To tackle the issue of load changes, which can significantly impact system performance, he proposes a control scheme based on sliding mode control of a full bridge inverter. This scheme ensures low steady-state error and rapid dynamic response, making the microgrid more resilient to changes in energy demand.
Maintaining the voltage stability of the DC bus is crucial for the overall performance of the microgrid. Chen’s research employs a traditional dual-circuit PI control scheme to achieve this, ensuring power balance within the system. “The goal is to create a stable and efficient microgrid that can operate independently, providing reliable power even in the absence of a central grid,” Chen states.
The practical implications of this research are vast. As the world moves towards more decentralized and renewable energy sources, independent microgrids will play a pivotal role. Chen’s control strategy could significantly enhance the reliability and efficiency of these microgrids, making them a more viable option for both urban and rural settings.
The simulation tests conducted in the Matlab/Simulink environment have already shown promising results, validating the effectiveness of Chen’s control strategy. As this research continues to evolve, it could pave the way for more advanced and reliable microgrid systems, ultimately shaping the future of the energy sector.
For energy professionals, the implications are clear: Chen’s work represents a significant step forward in the quest for stable, efficient, and independent microgrids. As the technology matures, we can expect to see more widespread adoption of these systems, driven by the need for sustainable and reliable energy solutions. The research published in Zhongguo dianli (China Electric Power) is a testament to the ongoing innovation in this field, and it will be exciting to see how Chen’s work influences future developments.