How to Improve Solar Energy Utilization Efficiency of Photovoltaic Energy Storage Systems?

House-type photovoltaic energy storage improves solar energy utilization

As the global demand for renewable energy increases, photovoltaic storage systems (PVS), as a clean and green energy solution, are gradually becoming mainstream in the energy sector. However, how to improve the solar energy utilization efficiency of PVS during the application process is still a challenge for many enterprises and households. brice Solar, based on the experience related to solar energy utilization, can significantly improve the solar energy utilization of PVS by optimizing the following aspects, and thus achieve higher energy conversion efficiency and storage effect.

1. Basic components of a PV energy storage system

PV energy storage system is mainly composed of the following three parts:

Solar PV panels: responsible for converting sunlight into electricity.

Energy storage devices, such as batteries, are used to store the electricity generated by the PV panels.

Energy management system: monitors and optimizes the storage and release of electrical energy in the whole system.

2. Strategies to improve the efficiency of solar energy utilization

Smoothing Output

The energy storage system can balance the power generated during peak and trough periods, reducing volatility and improving the stability and utilization of solar energy.

Extend the use time

Through the energy storage system, the electricity during the day is stored for use at night or on cloudy days, thus extending the use time of solar energy.

Preventing power wastage

Storing excess power to avoid power wastage during times of strong light and low power demand.

Optimize power quality

Regulating voltage and frequency through the storage system ensures power quality and improves the availability of photovoltaic power generation.

Enhance system response speed

The energy storage system responds quickly to changes in grid load, improving the flexibility of PV power generation and grid stability.

3. Technical measures to enhance efficiency

High-efficiency PV battery selection:

The use of monocrystalline silicon, polycrystalline silicon or thin-film batteries and other high-efficiency photovoltaic batteries, directly enhance the photoelectric conversion efficiency.

Advanced energy storage technology applications:

Lithium batteries: with high energy density, long cycle life and low self-discharge rate.

Flow batteries: such as vanadium flow batteries, suitable for large-scale energy storage with long life and fast response capability.

Intelligent energy management:

Optimize the charging and discharging strategy of the energy storage system using artificial intelligence, big data analysis and other technologies.

System integration design:

Integrate photovoltaic power generation and energy storage system to reduce energy conversion losses and improve overall efficiency.

4. Specific optimization path

Energy capture optimization:

Select high-efficiency modules, such as chalcogenide/crystalline silicon stacked batteries or high-efficiency photovoltaic cells, combined with graphene-enhanced encapsulation materials.

Integrate concentrator technology, such as Fresnel lens system, and liquid cooling and heat dissipation co-design.

Energy storage technology innovation:

Adoption of composite energy storage systems, such as hybrid architectures of lithium-ion batteries and supercapacitors.

Implement AI-based intelligent charging and discharging strategies to dynamically adjust charging and discharging thresholds.

System cooperative control:

Upgrade power electronic devices, such as adopting high-efficiency IGBT modules and SiC MOSFET devices.

Implement multi-energy complementary scheduling and optimize energy flow through energy management system.

Operation and maintenance enhancement:

Apply intelligent diagnostic technologies, such as IV curve scanners and drone infrared inspections.

Equipped with adaptive cleaning system, such as nano-coated self-cleaning components.

5. Typical Case Study

PV Scene in Yancheng, Jiangsu, China

Taking the 2GW optical storage and charging demonstration project in Yancheng, Jiangsu, China as an example, the following results are realized through the combination of the above technologies:

Average daily energy storage cycle times: 1.8 times.

LCOE: 0.23 Yuan/kWh, 31% lower than no energy storage system

Annual equivalent utilization hours: 1,680 hours, an improvement of 22%.

Through the above optimization strategies and technical measures for solar photovoltaic equipment, it is possible to achieve an effective enhancement of solar energy utilization efficiency for photovoltaic energy storage systems, which will make an important contribution to the promotion of energy structure transformation and sustainable development.