How big is the energy storage system capacity of a solar lighthouse?

How big is the energy storage system capacity of a solar lighthouse?

As a lighting system that uses Renewable Energy, the design of its energy storage system is crucial to ensure that the lighthouse can operate normally at night or in the absence of light. The following are some specific requirements and trends for the capacity of the energy storage system of a solar lighthouse based on the latest research and specifications:

1. Factors affecting the capacity of the energy storage system

According to the "Design Specifications for Photovoltaic Power Stations GB50797-2012", the capacity of the energy storage system configured for an independent photovoltaic power station should be determined based on local sunshine conditions, consecutive rainy days, load power requirements, and the technical characteristics of the energy storage battery. This means that the capacity of the energy storage system of a solar lighthouse needs to take into account the geographical location, climatic conditions, and lighting needs of the lighthouse.

2. Calculation method of energy storage system capacity

The capacity calculation formula of the energy storage battery is:

Energy storage battery capacity = system efficiency × solar cell array power divided by

Daily average power consumption of the load × consecutive days without sunshine

3. Optimal configuration of energy storage system capacity

Research shows that for tower-type solar thermal power stations, the optimization of the capacity of the heat storage system has a significant impact on the operating performance and comprehensive economic benefits of the power station. For example, for a 50MW tower solar thermal power station, when the solar multiple is 1.8, the levelized cost of electricity (LCOE) of the power station is the lowest and the economic benefit is the best when the heat storage time is 6 hours; when the solar multiple is 2.4, the LCOE of the power station is the lowest and the economic benefit is the best when the heat storage time is 8 hours.

4. Standards for energy storage system capacity
Some regions have put forward specific requirements for the construction of energy storage systems for photovoltaic projects. For example, according to the requirements of the "Implementation Rules" document, photovoltaic projects are equipped with energy storage systems at more than 10% of the installed capacity. This shows that in some application scenarios, the energy storage system capacity of solar lighthouses may need to reach or exceed 10% of the photovoltaic installed capacity.

5. Development trend of energy storage system capacity
With the advancement of technology and the reduction of costs, the capacity of energy storage systems has a tendency to increase. The research results show that the grid-connected potential of "photovoltaic + energy storage" is expected to reach 5.2PWh and 7.2PWh in 2030 and 2060, which indicates that the capacity of solar lighthouse energy storage systems may be further expanded.

In summary, the capacity of the energy storage system of a solar lighthouse depends on a variety of factors, including geographical location, climate conditions, load demand, etc. With the development of technology and the emphasis on the use of renewable energy, the capacity of the energy storage system of a solar lighthouse is expected to be further optimized and expanded to meet higher energy needs and improve economic benefits.

What is the relationship between the capacity of the energy storage system of a solar lighthouse and the amount of solar power generated?

There is a close relationship between the capacity of the energy storage system of a solar lighthouse and the amount of solar power generated. Here are a few key points that outline the connection between them:

The role of the energy storage system:
The role of the energy storage system in a solar lighthouse is to store the electricity generated during the day so that it can be used at night or when there is insufficient light. This helps to balance the intermittent and instability of solar power generation and ensure that the lighthouse can operate continuously and stably

Optimal configuration of energy storage capacity:
The capacity of the energy storage system needs to be optimized based on factors such as solar power generation, load demand, light conditions, and the number of consecutive days without sunshine. Reasonable energy storage capacity can improve grid stability, achieve peak shaving and valley filling effects, and reduce grid operation costs

Economic analysis:
The capacity configuration of the energy storage system is closely related to solar power generation because they jointly affect the economic benefits of the project. Energy storage systems can increase the proportion of self-generation and self-use, reduce electricity expenses, and output electricity at peak electricity prices, thereby improving economic benefits

Energy storage duration and cost per kilowatt-hour:
Energy storage duration is closely related to solar power generation and cost per kilowatt-hour. Increasing energy storage duration can increase power generation and reduce cost per kilowatt-hour, but after exceeding a certain energy storage duration, cost per kilowatt-hour may rise. Therefore, it is necessary to optimize energy storage duration according to specific circumstances

Advantages of integrated photovoltaic storage system:
Integrated photovoltaic storage system can smooth the output fluctuations of photovoltaic power generation, improve grid stability, and release stored electricity at peak power load to reduce grid pressure. This system has demonstrated its advantages in residential rooftop photovoltaic energy storage, large-scale ground power station supporting energy storage facilities and microgrid applications.

The coupling benefits of photovoltaic and energy storage:
The combination of photovoltaic power generation and energy storage system can bring additional economic benefits, including the difference between the grid electricity price when storing excess photovoltaic power and the photovoltaic transmission price, and the difference between the grid electricity price when storing excess photovoltaic power and the grid electricity price when releasing this part of power.

In summary, the energy storage system capacity of the solar lighthouse needs to be reasonably configured according to the solar power generation and actual demand to ensure the stable operation of the lighthouse and maximize economic benefits. The relationship between the energy storage system and the solar power generation is interdependent and complementary.

How do solar power generation and energy storage system capacity affect grid stability?

The impact of solar power generation and energy storage system capacity on grid stability is multifaceted, and can be understood from the following perspectives:

Voltage stability: When the solar photovoltaic system consumes reactive power, it may cause the grid voltage to drop. If the voltage drops too much, the electrical equipment in the grid may be damaged, affecting the transmission capacity of the grid. The energy storage system can help stabilize the grid frequency and voltage by storing excess electricity from solar power generation and releasing it when needed.

Spinning reserve: In order to cope with the intermittent and volatile nature of solar photovoltaics, the grid needs to maintain sufficient spinning reserve capacity. However, the increase in spinning reserve will increase operating costs. Energy storage systems can reduce reliance on spinning reserves and lower operating costs

PV power forecasting and grid fluctuation response strategies: Accurate PV power forecasting can reduce frequency deviation by more than 50%, reduce backup capacity requirements by up to 20%, and improve grid resilience

Battery energy storage system supports grid stability: Battery energy storage systems have extremely fast response speeds and can adjust power output within milliseconds to provide 1,300 megawatts of balancing services to cope with the intermittent and volatile nature of PV power generation

The impact of distributed PV grid connection on grid stability: Distributed PV grid connection has a significant impact on grid frequency and voltage stability. By analyzing the influencing factors and taking appropriate countermeasures, the stability challenges brought by PV grid connection can be effectively alleviated

The impact of large-scale solar access on the dynamic response of the grid: Large-scale solar access will lead to a decrease in grid voltage stability, especially when solar output is high. Measures need to be taken to improve the voltage stability of the power grid, such as adjusting photovoltaic output, energy storage system, voltage reactive power regulation device, etc.

Coordinated optimization of photovoltaic power generation and traditional power sources: Photovoltaic power generation and energy storage system form a close complementary relationship. The output power of photovoltaic power generation is smoothed by the energy storage system, the grid load is balanced, and the stability of the power system is improved

Photovoltaic storage and charging integrated system: The widespread application of the photovoltaic storage and charging integrated system has significantly improved the reliability and stability of power supply, reduced the pressure on traditional power grids, and greatly promoted the improvement of clean energy utilization rate and overall energy utilization efficiency

In summary, solar power generation and energy storage system capacity have a direct impact on the stability of the power grid. Reasonable energy storage system configuration and optimized photovoltaic power prediction can significantly improve the stability and reliability of the power grid and reduce the adverse effects caused by fluctuations in solar power generation.