In this paper, new improved maximum power point tracking using combinedbacksteppingsliding mode has been designed and studied, it is very known that the sliding mode control provides a good performance, however the charting (oscillation) is the most drawback of this method. So, to overcome the previous dilemma, a novel combined MPPT employing backstepping and sliding mode controller has been proposed, modeling of PV system and proposed hybrid backstepping-sliding have been presented with details. Simulation tests have been carried out using BP SX 150 solar panel, obtained results demonstrate a huge improvement in term of tracking, less oscillation and low ripple.

Although the great advance in power system production and operation, storage energy technologies and its control techniques can be considered as one of the most important and critical topics of power companies , government and consumers, especially when the power system containing renewable source and storage system simultaneously. In this paper, a novel electrical grid structure including photovoltaic system and storage system based on Superconducting Magnetic Energy Storage (SMES) has been proposed and investigated. The SMES produced power is injected in power system during specific time or when it required. Two control strategies for exchanged power Grid- SMES have been proposed and analyzed, the first uses sliding mode and the second uses field oriented control based on PI controller, also the injected SMES power is controlled by PID controller. In addition, the photovoltaic system operates at the MPP employing PID MPPT method. The proposed control strategies have been tested successfully in which many scenarios have been studied: standby and discharging of SMES, injection of SMES storage energy for variable and constant load and control of grid containing PV system. In addition, a comparative study of exchanged power Grid- SMES control using Sliding mode and field oriented control based on PI controller has been presented and discussed.