Today's society, the smart grid is the important means to realize energy strategy layout, the ideal power supply voltage should be pure sine wave, with a nominal amplitude and frequency. Power supply voltage, however, often appear all sorts of reason want to impedance, load of non-stationary and nonlinear and so on all kinds of power quality problems. Traditional energy storage device is difficult to quickly response to the electric power transient fluctuations. But by adding super capacitor system, can more smoothly solve the problem of user power quality, has a broad market prospect.

With the use of wind and solar clean energy promotion, the natural factors will not only bring instability to the grid, affect terminal YongDianHu, but will also lead to the low energy efficiency, affect the stable operation of the smart grid. In order to meet the peak load of power supply, must use the peak load of fuel, gas peak shaving plant for adjustment, because of the high fuel prices, this way of operation cost is too expensive. Super capacitor energy storage system can effectively solve the problem, it can be stored in the load is low power of redundant power, and at times of peak load, feedback to the smart grid to adjust the power demand. The super capacitor characteristics of large power density, high energy density makes it the best choice for dealing with peak load, and using the super capacitor storage and peak load considerable energy.

Energy storage system to improve the smart grid, power quality has played a very important role. Through the inverter control unit, can adjust the super capacitor energy storage system to the user and network to provide reactive power and active, so as to achieve the aim of improving power quality. Due to super capacitor can be rapidly absorbed, release the power electricity, very suitable for the application to the micro grid power quality control device, is used to solve some transient problems in system, such as for system failure caused by instantaneous power, voltage surge, the problem such as voltage sag, the use of super capacitor provides a quick power buffer, absorb or supply power, provide active power support for active or reactive power compensation, at a steady, smooth power grid voltage fluctuations.

Supercapacitors due to its long service life, large power and has good charge and discharge cycle, therefore become strengthen the ideal of renewable device output energy storage solutions, is expected to solve the problem of new energy grid together and improve power quality, promote the development of smart grid integration.