Microgrid Operation Optimization Method Considering Power-to-Gas Equipment: An Improved Gazelle Optimization Algorithm

Abstract

With the increasingly prominent defects of traditional fossil energy, large-scale renewable energy access to power grids has become a trend. In this study, a microgrid operation optimization method, including power-to-gas equipment and a hybrid energy storage system, is proposed. Firstly, this study constructs a microgrid system structure including P2G equipment and a hybrid energy storage system of electricity and hydrogen. Secondly, aiming at minimizing the system operation cost and carbon emission penalty cost, a low-carbon economic operation optimization model of the proposed microgrid is established. Then, this study proposes a microgrid optimization method based on an improved gazelle optimization algorithm to symmetrically improve economic and environmental performance. Finally, the practicability and superiority of the above model and optimization method are verified using a real microgrid case. The results show that considering the participation of P2G equipment and a hybrid energy storage system in the optimal operation, the carbon emission of the microgrid is reduced to 33.56% of the microgrid considering only a single electric energy storage system, and the comprehensive operation cost is reduced by 6.54%. This study is conducive to promoting the development of clean energy and symmetrically enhancing the economic and environmental performance of the microgrid.

A Coordinated Control Strategy of Multi-Type Flexible Resources and Under-Frequency Load Shedding for Active Power Balance

“…The inertia time constant of the synchronous machine is defined as the ratio of the rotor kinetic energy to the rated capacity under the unit's rated speed operation, which is expressed by (3).…”

“…With the rapid development of distributed renewable energy, active distribution networks have become a trend in the evolution of power systems [2]. However, the uncertainty and volatility of distributed renewable energy make the operation of power systems more complex and unstable [3,4]. Concurrently, with the integration of clean energy and distributed controllable loads, the inertia resources and regulation capabilities in the power system are weakened, resulting in a decrease in the system's frequency response capability and an increased risk of frequency decline [5,6].…”