Photovoltaic power generation is an important component of China’s sustainable development strategy for energy and electricity. In order to effectively address the strong volatility and randomness of photovoltaic power generation, energy storage technology has emerged.
Photovoltaic systems combined with energy storage units are a reliable means of efficiently utilizing clean energy and have become the preferred new energy method.
The advantages of photovoltaic+energy storage
01. Optimize the photovoltaic output curve
Photovoltaic power generation is greatly affected by the environment, with strong output volatility and randomness, which has a certain impact on the power grid.
Adding energy storage devices can track the output curve of photovoltaic power generation, eliminate peaks, fill in valleys, and turn photovoltaic output into a controllable curve, facilitating grid scheduling and reducing shocks.
For some areas where light and electricity are curtailed, energy storage systems can store the portion of energy that cannot be absorbed by the grid and connect it to the grid at other times, reducing waste caused by light and electricity curtailment.
02. Increase spontaneous self use rate
The photovoltaic system can prioritize the supply of photovoltaic power to the load by adding energy storage devices.
Excess electricity can be stored in batteries. When photovoltaic power generation is insufficient or at night, the batteries discharge to supply energy to the load, thereby increasing the spontaneous self use rate of the photovoltaic system and achieving energy self-sufficiency.
At the same time, it saves electricity expenses, effectively responds to the surge in electricity consumption, and avoids power outages.
03. Using Time of Use Electricity Prices to Reduce Electricity Expenses
Taking a city during peak and valley electricity consumption periods as an example: 6:00-22:00 during peak hours, and 6:00-6:00 the next day during valley hours.
In general, valley time electricity prices are much cheaper than peak time electricity prices. If users introduce solar energy storage systems and use photovoltaic power and peak valley time shifting methods, they can effectively reduce electricity costs.
Set the inverter to timed charging mode: 22:00-06:00 is the charging time period; 6: 00-22:00 is the discharge time period, and during the period of sufficient photovoltaic power, battery charging is given priority;
The system can control the charging and discharging time of batteries based on the peak and valley of the power grid, thereby improving profits.
04. Enhance the stability of microgrid systems
For areas without electricity or lacking electricity, or offshore islands, microgrids established through photovoltaic and energy storage can provide stable electricity.
Reduce the noise and environmental pollution caused by traditional energy sources, and have lower power supply costs, making it more economical and reliable.
Overall, photovoltaic+energy storage systems have many advantages, such as improving power supply reliability, increasing spontaneous self use rate, optimizing electricity bills, and so on.
Countries and regions around the world are affected by various factors such as energy scarcity and environmental pollution, and the application of optical storage systems is bound to develop into the norm.
More households will analyze the composition of local electricity bills, consider introducing photovoltaic energy storage, and integrate tiered electricity prices and peak valley electricity prices to effectively reduce electricity bills and minimize electricity expenditure.
