What is Photovoltaic Energy Storage?
Renewable energy is the direction of energy structure adjustment in the future, but only when the energy storage problem is solved can we enter the era of renewable energy. The future energy pattern is energy storage technology, which is likely to be the next energy revolution. The most important breakthrough direction. The “photovoltaic + energy storage” mode has many unique advantages in the operation process: first, it can assist the grid to operate more stably; second, the storage is used as a backup power source, which can improve the utilization rate of photovoltaics while allowing the user side to use electricity. Adjustable and controllable, which strengthens the user’s management and control of electricity costs; third, photovoltaic utilization with energy storage participation is more flexible and effective, which is beneficial to grid-connected operation on the user side.
Solar Photovoltaic Energy Storage Composition
The solar photovoltaic power generation system consists of photovoltaic modules, grid-connected inverters, box-type substations and other equipment. The solar energy is converted into DC power through photovoltaic modules, and then the DC power is converted into AC power through a grid-connected inverter, which is boosted and integrated into the grid.
Why is MANLY Lithium Iron Phosphate Suitable for Photovoltaic Energy Storage?
In recent years, many large-scale photovoltaic energy storage systems use lithium iron phosphate batteries for energy storage. The requirements for rechargeable batteries are high capacity, high output voltage, good charge-discharge cycle performance, stable output voltage, high-current charge and discharge, stable electrochemical performance, and safety without improper operation due to overcharge, over-discharge and short circuit. Caused by fire or explosion), the working temperature is wide and non-toxic or less toxic, and it is non-polluting to the environment.
MANLY LiFePO4 battery safety: safe and reliable, fully sealed, not afraid of fire, no explosion, long cycle life, at room temperature and 100% D0D, cycle life ≥ 7500 times, cost-effective, common materials, charge and discharge efficiency ≥ 98.5 %
The Role of Photovoltaic Energy Storage System
Co-design of the energy storage system and photovoltaic power station. A large-capacity energy storage system is configured in the photovoltaic power station. Through the energy storage system, the photovoltaic power generation can be stored in the energy storage system during the peak period of power transmission from the grid or when the sun is full and the self-load is low. Time supply for self-use or transmission to the power grid, reducing the technical difficulty of grid connection and dispatching operation, reducing the impact of photovoltaic power generation on the power grid, so as to reduce the effect of light abandonment and the impact on system protection. When the light is good and the output power of the photovoltaic grid-connected power station is large, the solar energy can charge the battery during the off-grid peak period during the day, make full use of the solar energy, and replenish the battery power in time to increase the battery backup capacity and reduce the depth of discharge; peak value Power supply in phase with the battery to maintain the stable output of the system, improve the stability of the system and the short-circuit current will increase the impact of reliability on the power quality. Volatility, through the energy storage and buffering of the energy storage system, the system can still operate at a stable output level even when the load fluctuates rapidly, improving power quality and reliability. The power grid fluctuations caused by peaks, voltage drops, and other external disturbances have a greater impact on the system. The use of enough energy storage systems can ensure the impact of the quality and reliability of power output on operation scheduling.
The output power of the photovoltaic power supply is directly affected by weather changes and cannot be controlled, so the dis-patchability of the photovoltaic power supply is also restricted. A set of remote communication and monitoring photovoltaic energy storage grid-connected systems needs to be configured. Scheduling tasks that can coordinate and control with photovoltaics. The grid-connected power is constant so that the active and reactive power of the photovoltaic grid-connected system can be adjusted, and the large power grid’s ability to accept the photovoltaic system is improved.
MANLY Photovoltaic Energy Storage System Module
Model |
Battery Type |
Capacity |
Output Watt |
Communication Interface(Optional) |
MU20000 |
LiFePO4 Battery | 20kWh | 10KW | CAN / RS485 / RS232 |
MU30000 |
LiFePO4 Battery | 30kWh | 10KW |
CAN / RS485 / RS232 |
Note:
1. Each model in the above table is equipped with a variety of communication interfaces, according to your actual user needs, choose whether to be equipped with one or two types of communication ports (three commonly used: CAN, RS485, RS232)
2. Inverter: The default brands are GoodWe, Growatt, etc. If you need other brands, please communicate with our salesman before sample production, and provide specific models or parameters
How Photovoltaic Energy Storage Works?
The energy storage system is mainly used in conjunction with the grid connection of photovoltaic power generation, effectively making up for the randomness, intermittency and stability of photovoltaic power generation, improving power quality, assisting power grid peak regulation, and improving power grid stability. There are many challenges such as the unexpanded proportion of energy access and the limited means of peak regulation; and high quality, self-healing, safe economy, and interaction are the standards of my country’s smart grid. Energy storage technology, especially large-scale energy storage technology, has many characteristics and can be widely used in the four major links of power generation, transmission, distribution, and power consumption. It can be said that the energy storage link is an indispensable key link in the construction of a smart grid and the realization of a large amount of electricity. When the electricity consumption is at the bottom, a large amount of electricity is stored, and a large amount of stored electricity is released when the electricity consumption peaks, which can save a lot of investment and greatly optimize the grid. structure to improve the safety performance of the power grid. In a certain sense, building a battery energy storage power station is like building a power plant, but it surpasses building a power plant in terms of comprehensive social and economic benefits.
The pv solar battery inverter output is used to supply the power load, with stable voltage and high quality, which avoids the damage to the equipment caused by the fluctuation of the mains supply voltage, prolongs the life of the power equipment, and saves the cost of the backup power supply function. When the mains power fails, the energy storage equipment can realize the function of uninterruptible power supply, ensure reliable power supply and normal production of enterprises, and create good economic benefits. , use, storage” is an essential part of the six major links. It has an irreplaceable role in the broad field of new energy utilization, showing a very good development prospect. At the same time, after the energy storage link of the system, it can effectively realize demand-side management, eliminate the peak-to-valley difference of the power grid, and smooth the power supply; it can not only use power equipment more effectively, reduce the cost of power supply, but also promote the application of renewable energy, and can also improve the It is a means of system operation stability, frequency adjustment, compensation of load fluctuation and improvement of system reactive power. The application of photovoltaic energy storage technology will bring significant changes to the traditional power system design, planning, scheduling, control and other aspects.
