Voltage Balancing Of Supercapacitors String Using Rectifier Diodes Analytical And Simulation Approach

::Supercapacitors (SCs) also called ultracapacitor or electric double-layer capacitors are considered as alternative to energy storage systems in many applications including wind turbines and electric vehicles where frequent charge/discharge and fast dynamic response is required. Due to high power density, fast energy storage characteristics and high efficiency SC is a prime focus in wireless charging for electric vehicles and electric tram systems. Due to technology limitations SCs poses low rated voltage which is insufficient for high voltage applications, although SCs are required to connect in series to achieve desire voltage range but due to internal parameters such as capacitance, equivalent series resistance (ESR) and self-discharge rate SCs draw unbalanced voltages during charge-discharge cycle. In this paper modelling approach for voltage balancing of SCs string using rectifier diodes is proposed, where two sets of SCs string are compared and discussed to verify results. Circuit design and simulation methods are used for this purpose.

Credit: renewable-energy-world.blogspot.com