What are the main applications of GH Energy supercapacitors?

The use of solar energy ultimately comes down to two aspects: solar energy utilization and sunlight utilization. Solar power generation is divided into photovoltaic power generation and solar thermal power generation. Photovoltaic power generation uses photovoltaic cells to directly convert solar energy into electrical energy. Photovoltaic power generation is far stronger than CSP in terms of conversion efficiency, equipment cost and development prospects. Since the advent of practical polysilicon photovoltaic cells, solar photovoltaic power generation applications have been applied. 

At present, solar photovoltaic power generation systems have three development directions: independent operation, grid-connected and hybrid photovoltaic power generation systems. In an independent operation system, an energy storage unit is generally necessary. It can store the surplus electric energy generated by sunlight for use when there is insufficient or no sunlight. At present, the demand of the international photovoltaic energy industry has begun to develop from remote rural areas and special applications to grid-connected power generation and building power supply. Photovoltaic power generation has transitioned from supplementary energy to alternative energy. Domestic photovoltaic energy systems are still mainly used in remote areas without electricity and independent photovoltaic power generation systems such as urban street lights, lawn lights, courtyard lights, and billboards. The energy storage system composed of battery packs can smooth out fluctuations in electrical energy caused by fluctuations in solar light intensity, and can also compensate for voltage sags or surges in the grid system, but due to the limited number of charge and discharge times, the charge and discharge time for large currents is slow and other factors, so its service life is shorter and the cost is higher. Therefore, the use of super capacitor banks in solar photovoltaic power generation systems will make grid-connected power generation more feasible.

Wind power, as the fastest growing renewable energy power generation technology, has broad application prospects. However, wind energy is a randomly changing energy source. Changes in wind speed will cause fluctuations in the output power of wind turbines, which will affect the power quality of the grid.

At present, the active power fluctuation of wind power mostly adopts the method of directly adjusting the operating state of the wind turbine to smooth its output power, but the power adjustment ability of this method is limited; the reactive power fluctuation usually adopts the parallel static reactive power compensation device for reactive power adjustment, but reactive compensation cannot smooth the fluctuation of active power. With additional energy storage equipment, reactive power can be adjusted, the bus voltage of the wind farm can be stabilized, and the active power can be adjusted in a wider range. Wind power research shows that the fluctuating power between 0.01Hz-1Hz has the greatest impact on the power quality of the power grid, and the suppression of wind power fluctuations in this frequency band has the greatest impact on the power quality of the power grid. The suppression of wind power fluctuations in this frequency band can be achieved by using a shorter period of energy storage. Therefore, the small-capacity energy storage device that can realize short-term energy storage has high application value for wind power generation. Supercapacitors can adapt to the large current fluctuations of wind energy because of their charge-discharge cycle life of more than tens of thousands of times and high-current charge-discharge characteristics. They can absorb energy under the conditions of sufficient sunlight or strong wind during the day, and at night or weak wind Timely discharge, which can smooth the fluctuation of wind power and realize more effective grid connection.

In the field of new energy vehicles, supercapacitors can be used in conjunction with secondary batteries to achieve energy storage and battery protection. Normally supercapacitors are used in conjunction with lithium-ion batteries, and the perfect combination of the two forms a stable, energy-saving and environmentally friendly power supply for power vehicles, which can be used in hybrid vehicles and pure electric vehicles. Lithium-ion batteries solve the problems of car charging and storing energy and providing long-lasting power for the car. The mission of the super capacitor is to provide high-power auxiliary power for the car to start and accelerate, and to collect and store energy when the car is braking or idling. The super capacitor can quickly recover and store energy when the car is decelerating, downhill, or braking, and safely converts the excess irregular power generated by the car during operation into the charging energy of the battery to protect the safe and stable operation of the battery; when starting or accelerating, the battery transfers the energy into the super capacitor first, and the super capacitor can provide the required peak energy in a short time.