Hospital solar microgrid system is a distributed energy system that relies primarily on solar  power generation to provide reliable and sustainable electricity supply to hospitals. The system consists of solar photovoltaic arrays, energy storage systems, energy management systems, and microgrid control systems.             The core component of the system is the photovoltaic array, which consists of a series of photovoltaic panels that convert solar energy into direct current electricity. These photovoltaic panels are typically installed on the roofs of hospital buildings or other suitable areas to harness the energy from the sun and generate electricity. By generating electricity from the photovoltaic array, the system reduces reliance on the traditional power grid, saves electricity costs, and lowers carbon emissions.       The energy storage system stores excess electricity produced during sunny days or when the photovoltaic generation exceeds the hospital's demand. Typically utilizing advanced technologies such as lithium-ion batteries, the energy storage system offers high efficiency, long lifespan, and a large storage capacity. This ensures uninterrupted power supply to the hospital during nighttime or on cloudy/rainy days, ensuring the normal operation of medical equipment and critical facilities.      The energy management system oversees the overall management of photovoltaic generation and energy storage systems. By monitoring energy production and consumption, the energy management system optimizes energy distribution and ensures a stable power supply. It also provides real-time monitoring of the system's performance and generation efficiency, offering data analysis and reports to assist hospitals in achieving energy conservation and optimization.      The microgrid control system serves as the intelligent core of the hospital photovoltaic microgrid system. It precisely controls the energy flow between photovoltaic generation, energy storage systems, and the grid to maximize energy utilization. The microgrid control system enables bi-directional energy exchange and energy sharing with the traditional power grid.       By adopting the photovoltaic microgrid system, hospitals can reduce their reliance on the traditional power system and enhance the reliability and stability of their electricity supply. Additionally, the system significantly reduces energy costs, decreases reliance on fossil fuels, and minimizes environmental pollution. Therefore, the photovoltaic microgrid system plays a vital role in the sustainable development and green energy transition of hospitals.

     In recent years, with the growing awareness of climate change, the international community has actively sought to achieve a win-win situation between the economy and the environment to reduce environmental pollution and reduce carbon emissions. In this context, renewable energy has become a sustainable energy solution, including photovoltaics, wind power, hydropower, geothermal energy and biomass energy. Compared with non-renewable and limited resources such as fossil fuels and coal, nature continuously produces renewable energy, and its replenishment rate is much higher than the consumption rate, which is more environmentally friendly. Therefore, renewable energy has become a focus of today's society and is regarded by various countries as an important carbon reduction development project.       One of the most well-known renewable energy sources is photovoltaics. Photovoltaics uses photovoltaic panels to capture and then convert it into electrical energy. In recent years, the price of photovoltaic panels has continued to decline and the technical maturity has continued to improve, making photovoltaic power generation systems more and more accessible and can be used to power homes, businesses and even entire communities.       Another common renewable energy source is wind power. By setting up wind turbines, wind power causes the blades to rotate to generate kinetic energy, which is then converted into electricity. Wind energy is widely favored in the global energy industry. With the advancement of technology and the realization of economies of scale, the cost of wind power has gradually decreased. Many countries and regions have been able to produce wind power at competitive prices, making wind power generation a cost-effective energy option. In addition, wind resources are widely distributed around the world and can be developed in many regions, which can help non-oil mining countries reduce their dependence on imported energy and increase the stability of energy supply.        In addition, renewable energy also includes biomass energy and geothermal energy. Biomass energy is obtained from plant and animal debris, such as burning wood to generate heat. Geothermal energy converts geothermal heat into mechanical energy, and then converts mechanical energy into electrical energy.        In general, renewable energy has an important impact on achieving energy transformation and mitigating climate change, while also creating a sustainable future. With the continuous advancement of technology, policy support and market promotion, renewable energy will continue to develop rapidly and become an important force in dominating the future global energy system.