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Dynamic Modelling and Control Design of Advanced Energy Storage for Power System Applications

By Marcelo Gustavo Molina


This chapter has thoroughly discussed the power application of advanced distributed energy storage systems in modern electrical microgrids. More specifically, of the various advanced storage systems nowadays existing, the three foremost ones for power applications have been considered, i.e. ultra capacitors, SMESs and flywheels. To this aim, major operating characteristics of these modern devices have been analyzed and a real detailed full dynamic model of all DES units has been studied. Moreover, a novel power conditioning system of the selected DES units to simultaneously and independently control active and reactive power flow in the distribution network level and a new three-level control scheme have been proposed, comprising a full decoupled current control strategy in the synchronous-rotating d-q reference frame. The dynamic performance of the proposed systems has been fully validated by digital simulations carried out by using SimPowerSystems of MATLAB/Simulink. The dynamic modelling approaches proposed describe the dynamic behaviour of the DES units over the frequency range from DC to several thousand Hertz with sufficient accuracy. The results show that the novel multi-level control schemes ensure fast controllability and minimum oscillatory behaviour of the DES systems operating in the four-quadrant modes, which enables to effectively increase the transient and dynamic stability of the power system. The improved capabilities of the integrated DSTATCOM-DES controllers to rapidly control the active power exchange between the DES and the utility system, simultaneously and independently of the reactive power exchange, permit to greatly enhance the operation and control of the electric system. The fast response DES devices show to be very effective in enhancing the distribution power quality, successfully mitigating disturbances such as voltage sags and voltage/current harmonic distortion, among others

Topics: Dynamic Modelling
Publisher: 'IntechOpen'
Year: 2010
DOI identifier: 10.5772/7092
OAI identifier:
Provided by: IntechOpen

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