A design of cascade control system and adaptive load compensator for battery/ultracapacitor hybrid energy storage-based direct current microgrid

2016 ◽  
Vol 114 ◽  
pp. 154-167 ◽  
Author(s):  
Danijel Pavković ◽  
Mihael Lobrović ◽  
Mario Hrgetić ◽  
Ante Komljenović
Keyword(s):  
Control System ◽  
Energy Storage ◽  
Direct Current ◽  
Cascade Control ◽  
Hybrid Energy ◽  
Hybrid Energy Storage ◽  
Cascade Control System

scholarly journals Damping Optimum-Based Design of Control Strategy Suitable for Battery/Ultracapacitor Electric Vehicles

Energies ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 2854 ◽  
Author(s):  
Danijel Pavković ◽  
Mihael Cipek ◽  
Zdenko Kljaić ◽  
Tomislav Mlinarić ◽  
Mario Hrgetić ◽  
...  
Keyword(s):  
Control System ◽  
Energy Storage ◽  
Electric Vehicle ◽  
Storage System ◽  
Energy Storage System ◽  
Hybrid Energy ◽  
Hybrid Energy Storage ◽  
Hybrid Energy Storage System ◽  
Dc Bus ◽  
Upper Level

This contribution outlines the design of electric vehicle direct-current (DC) bus control system supplied by a battery/ultracapacitor hybrid energy storage system, and its coordination with the fully electrified vehicle driveline control system. The control strategy features an upper-level DC bus voltage feedback controller and a direct load compensator for stiff tracking of variable (speed-dependent) voltage target. The inner control level, comprising dedicated battery and ultracapacitor current controllers, is commanded by an intermediate-level control scheme which dynamically distributes the upper-level current command between the ultracapacitor and the battery energy storage systems. The feedback control system is designed and analytical expressions for feedback controller parameters are obtained by using the damping optimum criterion. The proposed methodology is verified by means of simulations and experimentally for different realistic operating regimes, including electric vehicle DC bus load step change, hybrid energy storage system charging/discharging, and electric vehicle driveline subject to New European Driving Cycle (NEDC), Urban Driving Dynamometer Schedule (UDDS), New York Certification Cycle (NYCC) and California Unified Cycle (LA92), as well as for abrupt acceleration/deceleration regimes.

scholarly journals An Active Hybrid Energy Storage System Utilising a Fuzzy Logic Rule-Based Control Strategy

2020 ◽  
Vol 11 (2) ◽  
pp. 34
Author(s):  
Maarten J. van Jaarsveld ◽  
Rupert Gouws
Keyword(s):  
Fuzzy Logic ◽  
Energy Storage ◽  
Direct Current ◽  
Control Strategy ◽  
Storage System ◽  
Energy Storage System ◽  
Rule Based ◽  
Hybrid Energy ◽  
Hybrid Energy Storage ◽  
Hybrid Energy Storage System

The research presented in this paper documents the implementation of an active hybrid energy storage system that combined a battery pack and an ultracapacitor bank. The implemented hybrid energy storage system was used to reduce the peak-power that the battery needs to provide to the load. An active topology utilising two direct current/direct current (DC/DC) converters and a switch was used to implement the hybrid energy storage system. Fuzzy logic was used as a close-loop control structure to control the DC/DC converters in the topology, whilst a rule-based control strategy was used to control the operating states of the hybrid energy storage system. Experimental implementation of the system showed that the system was able to actively control the energy flow throughout the hybrid energy storage system in order to limit the power drawn from the battery to a user-defined limit. The performance of the fuzzy logic controllers was also experimentally found to be sufficient when used in conjunction with the rule-based control strategy. The system allows one to utilize batteries that are optimized for energy density seeing that the system was able to actively limit the power drawn from the battery, whilst providing the required power to the load by utilising the ultracapacitor bank.

Simulation on Control Strategies of Hybrid Energy Storage

2013 ◽  
Vol 860-863 ◽  
pp. 582-585
Author(s):  
Hui Min Cheng ◽  
Hong Bin Wu
Keyword(s):  
Control System ◽  
Energy Storage ◽  
Storage System ◽  
Energy Storage System ◽  
Total Output ◽  
Hybrid Energy ◽  
Hybrid Energy Storage ◽  
Hybrid Energy Storage System ◽  
Micro Grid ◽  
Central Control System

Hybrid energy storage system, applied in micro-grid, can bring a higher technical performance. A hybrid energy storage system, including batteries and super-capacitors, is presented in this paper. For maintaining the micro-grid stability, the control strategy of the hybrid energy storage system is divided into two layers:central control systemandlocal control system. The central control system is used to calculate the total output power which the micro-grid wants, and the local control system is used to divide the total output power signal into a frequent fluctuant part and a smooth part, and control the super-capacitors inverters and the batteries inverters to output with these two power signals respectively. With the example system in PSCAD/EMTDC, it proves the effectiveness and feasibility of the control strategy.

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