Fuel cell-based DC microgrids (FC-DCMGs) offer clean, sustainable energy but face stability issues due to constant power loads (CPLs) and load-dependent fuel cell voltage. The four-switch buck-boost (4SBB) converter, ...
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Fuel cell-based DC microgrids (FC-DCMGs) offer clean, sustainable energy but face stability issues due to constant power loads (CPLs) and load-dependent fuel cell voltage. The four-switch buck-boost (4SBB) converter, with its non-inverting behavior and wide operating range, is ideal for interfacing fuel cells in DCMGs. However, robust control is crucial for seamless integration. This paper proposes a novel hybrid nonlinear controller for the CPL-fed 4SBB converter in FC-DCMGs to improve dynamic performance and robustness under load variations. The controller merges the robustness of supertwisting switching with the fast convergence of enhanced integral-based synergetic control. Control design is based on an average state-space model, incorporating a third-order polynomial model to estimate load-dependent fuel cell voltage. controller parameters are optimized using the slime mould algorithm, minimizing the integral time absolute error (ITAE) to address both transient and steady-state behavior. Extensive simulations validate the performance of the proposed controller under varying resistive loads, changing CPL demands, and input voltage fluctuations. Compared with conventional sliding mode control (SMC) and Lyapunov function-based control (LFC), the proposed controller exhibits superior performance: a fast settling time of 1.8 ms (SMC: 5.7 ms, LFC: 25 ms), minimal overshoot of ≤ 4.16 % (SMC: ≤ 6.87 % , LFC: ≤ 5.20 % ), undershoot of ≤ 2.91 % (SMC: ≤ 5 % , LFC: ≤ 3.75 % ), retracing time of ≤2.5 ms (SMC: ≤5.5 ms, LFC: ≤20 ms), zero steady-state error, and no chattering. Furthermore, the real-time viability of the proposed controller is confirmed through controller hardware-in-the-loop (C-HIL) tests using the Texas Instruments TMS320F28379D Delfino Launchpad.
Rotating emergency generators (EG) have been increasingly installed to provide backup power in cases of blackouts. However, conventional rotating generators cannot provide fast pickup of load as soon as a blackout is ...
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ISBN:
(纸本)9781728119816
Rotating emergency generators (EG) have been increasingly installed to provide backup power in cases of blackouts. However, conventional rotating generators cannot provide fast pickup of load as soon as a blackout is detected. The paper presents a hybrid UPS system based on a battery energy storage system (BESS) and a rotating EG that can provide Class 2 response to the load during the power transfers between the load and the utility as per the Japanese standard on UPS JEC2433-2016. The same idea is also shown to work for cost savings by switching to backup power for areas with multi-part or time-of-use tariffs. The design process including controllerhardware in the loop (CHIL) testing with real time simulators is also presented as it makes the design process more efficient. The process was used to test compliance with JEC2433-2016 in addition to speeding up the controller validation and testing step in the product design and development cycle. The proposed hybrid UPS is validated using CHIL and hardware testing.
The use of distributed control systems for microgrid control has gained traction in recent years for their reliability and modularity. As part of microgrid control core functions, islanding is implemented to enhance p...
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ISBN:
(纸本)9781728103952
The use of distributed control systems for microgrid control has gained traction in recent years for their reliability and modularity. As part of microgrid control core functions, islanding is implemented to enhance power supply reliability during outages. This paper proposes a distributed multi-agent control system architecture for the management of microgrid assets. Specifically, it addresses the islanding problem, whereas three agent categories are designed to control distributed energy resources, loads and other assets. The proposed control approach is unique as it centrally sources critical commands while keeping the commands execution local and based on distributed coordination. Post-islanding transients are minimized and system stability is retained by implementing two distributed load shedding and load curtailment algorithms for unplanned and planned islanding events, respectively. A controllerhardware-in-the loop real-time simulation on a modified CIGRE North American medium voltage distribution benchmark has been developed and used to demonstrate the effectiveness of the approach.
The use of distributed control systems for microgrid control has gained traction in recent years for their reliability and modularity. As part of microgrid control core functions, islanding is implemented to enhance p...
详细信息
The use of distributed control systems for microgrid control has gained traction in recent years for their reliability and modularity. As part of microgrid control core functions, islanding is implemented to enhance power supply reliability during outages. This paper proposes a distributed multi-agent control system architecture for the management of microgrid assets. Specifically, it addresses the islanding problem, whereas three agent categories are designed to control distributed energy resources, loads and other assets. The proposed control approach is unique as it centrally sources critical commands while keeping the commands execution local and based on distributed coordination. Post-islanding transients are minimized and system stability is retained by implementing two distributed load shedding and load curtailment algorithms for unplanned and planned islanding events, respectively. A controllerhardware-in-the loop real-time simulation on a modified CIGRE North American medium voltage distribution benchmark has been developed and used to demonstrate the effectiveness of the approach.
Designing digital control system for fuel cell vehicle (FCV) with energy storage (ES) power management strategy can be costly and time consuming. In this paper, controller hardware-in-the-loop (CHIL) simulations are u...
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ISBN:
(纸本)9781424426003
Designing digital control system for fuel cell vehicle (FCV) with energy storage (ES) power management strategy can be costly and time consuming. In this paper, controller hardware-in-the-loop (CHIL) simulations are used to design power management strategies using Real Time Digital Simulator (RTDS) for a FCV system with ES. CHIL simulation is a rapid, low-cost prototyping and testing method for digital controller design for FCV. The idea is to replace the simulated control system with a real hardwarecontroller, which interacts with the rest of the system that are simulated on the RTDS. In particular, two power management strategies were developed for the FCV system with ES. The FCV power train was modeled and simulated on RTDS in real time. The power management strategies were implemented using a hardwarecontroller digital signal processor (DSP). The CHIL simulation waveforms were consistent with pure software simulation waveforms. The experiment results demonstrated that CHIL using RTDS provides a fast, safe and reliable method to design and test power management strategies for FCV with ES.
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