Shanghai high-end manufacturing re-major breakthrough! Recently, the Shanghai Electronics subsidiary in energy Smart Energy, Shanghai Bao quasi-power companies independently developed the world's first two-way stand-alone ten megawatts of energy storage inverter debut 12th International Photovoltaic Power With Smart Energy (Shanghai) Exhibition, the successful development of this equipment and the launch of the market symbolizes that Shanghai has reached an international advanced level in energy storage technology and key equipment. At the same time, it is expected to solve the problem of long-term harassment of China's new energy sector. 'problems.
In recent years, with the advent of the low-carbon era, the new energy industry represented by photovoltaics and wind power has rapidly emerged, but it also poses no small challenge. Yu Jiangang, Chairman of Shanghai Electric Tools Research Institute, said that new energy generation has a Characteristics such as sex, volatility, and intermittency. The distributed power supply of new energy has extremely high requirements on the stability, safety and high efficiency of the power grid. If the stability of the power grid cannot be achieved, the stability and safety of the power grid will be brought once the grid is connected to the grid. Hidden danger.
Especially in the “Three North” region of China, wind power and other new energy sources are abundant but the demand for electricity is insufficient. It is difficult to absorb on the spot. In addition to the grid connection problem, many electricity can only be discarded. In some areas, the rate of electricity abandonment reached 30%. Above, many photovoltaic power plants can only really "sun", which casts a shadow on the development of the new energy industry.
How to solve this problem? The rapid development of energy storage technology, especially electrochemical energy storage technology, provides a reliable path to solve the harm caused by the unstable power supply of new energy. Yu Jiangang said that the energy storage system can be controlled through controlled charge and discharge. The effectiveness of power grid fluctuations caused by new energy sources has gradually been recognized by experts, scholars and the general public. With the increasing scale of new energy construction, the demand for large-scale electrochemical energy storage systems is imminent.
However, how can large-scale energy storage systems respond quickly and synchronize the unpredictable fluctuations of new energy power? The industry needs to break through a number of key technological bottlenecks. One of the high-power bidirectional energy storage inverters that undertakes power conversion is one of them.
Currently, the single-phase power of two-way energy storage inverters actually operated in the market is mostly 10 kilowatts and 100 kilowatts. The reason is that as the power increases, the number of internal power modules increases year-on-year, resonance between modules, circulation, etc. Uncertainty factors increase geometrically, which brings a huge test to the stability, consistency and safety of the overall system.
The National 863 Program set up a special research direction as early as 2014: research on key technologies for photovoltaic microgrids and development of core equipment. The technical goal of this country's top project is to 'develop a 500 kilowatt photovoltaic-storage charge controller and apply it to micro The 500 kilowatt self-synchronous voltage source inverter of the network system realizes more than three parallel operation's. The key technology focuses on 'large-capacity 500 kilowatts' 'self-synchronous voltage source inverter' 'multi-machine parallel connection to achieve more than three parallel connections Run'.
Shanghai Yidian's first stand-alone 10 MW bidirectional energy storage inverter in the world not only increases the national technical target from 100 kilowatts per kilowatt to 10,000 kilowatts, but also allows multi-machine operation in parallel. Industry experts stated that ten megawatts of bidirectional energy storage The inverter implements the self-synchronous voltage source function of the 'quasi-virtual synchronous machine' operating characteristics, which helps solve the difficult problem of smooth power supply operation for new energy power grids that are smoothly connected to the grid. Its innovative parallel connection technology realizes multi-machine voltage source parallel connection. Operation provides reliable technical support for large-scale energy storage systems.
Ten-megawatt two-way energy storage inverters will greatly facilitate the large-scale application of electrochemical energy storage, making it possible to replace pumped-storage energy, and its modular and flexible flexible combination becomes one of the important options for strategic power supply. It is the core weapon for building a flexible, flexible, safe and controllable large-scale energy storage system in the future, and it is also an important support for the construction of a future friendly, interactive smart grid.
According to reports, Shanghai Yidian is currently negotiating with Gansu on the construction of a power storage power station project. It plans to build a 100 MW-class energy storage power station in Gansu Province and focus on solving the 'rejection of electricity' problem. With the future 100 MW-class energy storage power station The operation will realize millisecond-level flexible response, obey the scheduling, control peak-shift FM, absorb new energy and surplus power, and stabilize power fluctuations, helping to build a new generation of intelligent, controllable, and flexible smart grid.