Energy management of a fuel cell serial–parallel hybrid system

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Engineering

ENERGY MANAGEMENT OF A FUEL-CELL SERIAL–PARALLEL HYBRID
SYSTEM
ABSTRACT
In this paper, a serial–parallel hybrid (SPH) power system formed by a fuel cell (FC), an
auxiliary storage device (ASD), and the current-controlled dc–dc converters responsible for the
power management are realized by using the digital signal controller (DSC) TMS32F28335. The
main energy management goal is to transfer energy from the sources (FC or ASD) to the load
while ensuring dc bus voltage regulation and high power conversion efficiency. In addition, a
safe and reliable operation of the system has to be achieved. The selected converter and its
controller features are non inverting voltage step up and step down, high efficiency, regulation of
input and output currents and low ripple values, and the ability to change from input to output
current regulation loop, suddenly and smoothly, and vice versa. All these features allow it to be
positioned in different FC system localizations and simplify the design of the master control.
Simulation and experimental results have been validated on a 48-V 1200-W dc bus.

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Power Generation and Transmission is a complex process, requiring the working of many components of the power system in tandem to maximize the output. One of the main components to form a major part is the reactive power in the system. It is required to maintain the voltage to deliver the active power through the lines. Loads like motor loads and other loads require reactive power for their operation. To improve the performance of ac power systems, we need to manage this reactive power in an efficient way and this is known as reactive power compensation. In developing countries like India, where the variation of power frequency and many such other determinants of power quality are themselves a serious question, it is very vital to take positive steps in this direction. The work presented here illustrates a method to compensate for the load reactive power using a DSTATCOM A DSTATCOM injects a current into the system to provide for the reactive component of the load current. The validity of proposed method and achievement of desired compensation are confirmed by the results of the simulation in MATLAB/ Simulink.

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Application of FACTS controller called Static Synchronous Compensator STATCOM to improve the performance of power grid with Wind Farms is investigated .The essential feature of the STATCOM is that it has the ability to absorb or inject fastly the reactive power with power grid . Therefore the voltage regulation of the power grid with STATCOM FACTS device is achieved. Moreover restoring the stability of the power system having wind farm after occurring severe disturbance such as faults or wind farm mechanical power variation is obtained with STATCOM controller . The dynamic model of the power system having wind farm controlled by proposed STATCOM is developed . To validate the powerful of the STATCOM FACTS controller, the studied power system is simulated and subjected to different severe disturbances. The results prove the effectiveness of the proposed STATCOM controller in terms of fast damping the power system oscillations and restoring the power system stability.

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Application of FACTS controller called Static Synchronous Compensator STATCOM to improve the performance of power grid with Wind Farms is investigated .The essential feature of the STATCOM is that it has the ability to absorb or inject the reactive power with power grid. Therefore, the voltage regulation of the power grid with STATCOM FACTS device is achieved. Moreover restoring the stability of the power system having wind farm after occurring severe disturbance such as faults or wind farm mechanical power variation is obtained with STATCOM controller. The dynamic model of the power system having wind farm controlled by proposed STATCOM is developed. To validate the powerful of the STATCOM FACTS controller, the studied power system is simulated and subjected to different severe disturbances. The results prove the effectiveness of the proposed STATCOM controller in terms of fast damping the power system oscillations and restoring the power system stability.

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Energy management of a fuel cell serial–parallel hybrid system

1. ENERGY MANAGEMENT OF A FUEL-CELL SERIAL–PARALLEL HYBRID SYSTEM ABSTRACT In this paper, a serial–parallel hybrid (SPH) power system formed by a fuel cell (FC), an auxiliary storage device (ASD), and the current-controlled dc–dc converters responsible for the power management are realized by using the digital signal controller (DSC) TMS32F28335. The main energy management goal is to transfer energy from the sources (FC or ASD) to the load while ensuring dc bus voltage regulation and high power conversion efficiency. In addition, a safe and reliable operation of the system has to be achieved. The selected converter and its controller features are non inverting voltage step up and step down, high efficiency, regulation of input and output currents and low ripple values, and the ability to change from input to output current regulation loop, suddenly and smoothly, and vice versa. All these features allow it to be positioned in different FC system localizations and simplify the design of the master control. Simulation and experimental results have been validated on a 48-V 1200-W dc bus.

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