Development and Implementation of a Supervisor Strategy and Sliding Mode Control Setup for Fuel-Cell-Based Hybrid Generation Systems

Abstract

Abstract-This paper presents the development and experimental results of a supervisor strategy and a sliding mode control setup to improve the performance of hybrid generation systems. The topology in this work is conformed by a core, comprising a Fuel Cell Module and a Supercapacitor Module, in combination with an Alternative Energy Source Module and an electrolyzer. In particular, a wind power turbine is considered as alternative power source, to attain a hybrid generation system fully relying on renewable energy. Firstly, a supervisor strategy is proposed to manage the power flows of the subsystems and coordinate the system as a whole. Subsequently, a sliding mode control setup for combined operation of the DC/DC power converters of the Fuel Cell/Supercapacitor core is presented to track the power references synthesized by the supervisor control. Both control levels, supervisor strategy and sliding mode controllers, are implemented and assessed through extensive experimental tests, under different wind conditions and heavy load changes.

Lyapunov Function and Sliding Mode Control Approach for the Solar-PV Grid Interface System

“…Further, the sign of the third term in (18) must be positive. To verify the sign of third term in (18), one replaces d in the third termby (11) and (14). After rearranging and simplifying the third term, following expression is obtained as,…”

“…Sliding mode approach (SMC) as solution is proposed in [14] to solve the problem related to the operating point that oscillates …”

“…However, this method is complex in implementation as it needs the location of the operating point. In addition, the control is switched in between adaptive duty cycle and fixed duty cycle control, which makes its implementation difficult in real time.Sliding mode approach (SMC) as solution is proposed in [14] to solve the problem related to the operating point that oscillates …”

Sustainability and process control: A survey and perspective

“…Storage devices with high specific power (e.g. supercapacitors, flywheels, and superconducting magnetic energy storage) can be used to compensate for rapid fluctuations in load or renewables production to lessen stress placed on the electrical network [356] or so that other dispatchable generators can operate at steady state to improve unit efficiency and lifespan [357][358][359][360]. Due to the damping of these power fluctuations, a higher local penetration of renewable power can be achieved without violating constraints on power quality.…”

“…Control schemes have also been investigated for hybrid storage systems (e.g. battery-supercapacitor or battery-hydrogen storage) that take advantage of devices which can store energy over different time scales to optimally integrate renewable power generation [358,360,370,372,373]. Some technologies can also be used for long-term, seasonal storage of energy to compensate for annual trends in renewables availability.…”