A new cascaded control strategy for paralleled line-interactive UPS with LCL filter

Zhang, X Y; Zhang, X H; Li, L; Liu, Feng; Zhang, Y S

doi:10.1088/1755-1315/40/1/012028

Cited by 5 publications

(2 citation statements)

References 12 publications

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“…Then, the 12V leadacid or NiMH rechargeable battery is utilized to supply voltage during the backup time. On the other hand, the full bridge inverter is responsible to convert DC voltage to AC voltage desired by the load [23].…”

Section: Figure 1 Nominal Discharge Curve Of Batterymentioning

confidence: 99%

Characteristics of lead-acid and nickel metal hydride batteries in uninterruptible power supply operation

Rohman¹,

Rahman²,

Zainuri³

2019

IJPEDS

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<span>Batteries are one of the main elements in Uninterruptable Power Supply (UPSs). To maintain good operation during power failure, UPSs must have adequate energy for their operation. It depends on the reliability and performance of batteries. Owing to low capital cost and wide availability, lead-acid batteries have been used extensively as the main energy source in UPSs. Nevertheless, as batteries technology grown, Nickel Metal Hydride (NiMH) batteries have offered more promising performance than lead-acid batteries; they are installed in various portable electronic devices. This paper provides an overview of the performance of lead-acid and NiMH batteries during the operation of a single-phase UPS. Their performances are studied based on 2 characteristics which are discharge curve and State of Charge (SOC). Based on those characteristics, both batteries have shown different performances. Simulation results have shown that the NiMH battery exhibits better discharge curve with higher voltage capacity and constant discharge current, and it is more reliable to obtain 12V at minimum percentage of SOC than the lead-acid battery.</span>

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Section: Figure 1 Nominal Discharge Curve Of Batterymentioning

confidence: 99%

Characteristics of lead-acid and nickel metal hydride batteries in uninterruptible power supply operation

Rohman¹,

Rahman²,

Zainuri³

2019

IJPEDS

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“…There is no common ac bus in the modular microgrid and each module is responsible for the ac voltage quality within the module. So the control of modular microgrid only considers the ac voltage control within the module [14]- [16] and exchange power control between the module and the transmission network [17]. Such control scheme is much simpler than that of the traditional one.…”

Section: Introductionmentioning

confidence: 99%

Delay-Dependent Stability Analysis of Modular Microgrid With Distributed Battery Power and SoC Consensus Tracking

Zhang

Huang

et al. 2019

IEEE Access

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The modular microgrid based on distributed battery storages is a simple and reliable power supply way for the islands. Modules are interconnected to the transmission network through the three-port converter. The three-port converter supplies the local ac bus voltage within the module and realizes the power exchange between the module and the transmission network. Distributed battery power and SoC consensus tracking model considering communication time delay is established on the leader-following multi-agent consensus tracking theory. By using the delay decomposition method, where the delay interval is discretized into two segmentations with an equal width, a modified Lyapunov-Krasovskii functional is constructed. A delay-dependent sufficient condition for the absolute stability of the battery power and SoC consensus tracking is derived in terms of linear matrix inequalities (LMIs) by using the free-weighting matrix method. The maximum delay margin corresponding to different controller parameters is calculated with the LMI toolbox of MATLAB. The case study is carried out based on the DongAo Island microgrid demonstration project. Simulations of battery power and SoC consensus tracking with constant time or time-varying delays verifies the effectiveness of the maximum delay margin determined by the stability criteria. Experiments reveal that the three-port converter can meet the requirements of the modular microgrid networking and operation control. The distributed battery power and SoC consensus tracking of the modular microgrid can be achieved when the communication time delay is less than the maximum delay margin. INDEX TERMS Modular microgrid, power and SoC consensus tracking, distributed battery storages, time delay, multi agent system, Lyapunov-Krasovskii functional.

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Control Strategy Analysis of a Novel Transformerless Unified Power Quality Controller Based on Ultracapacitor and TRIAC

Chen

Dong

Zhao

et al. 2021

2021 IEEE 4th International Conference on Power and Energy Applications (ICPEA)

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A new cascaded control strategy for paralleled line-interactive UPS with LCL filter

Cited by 5 publications

References 12 publications

Characteristics of lead-acid and nickel metal hydride batteries in uninterruptible power supply operation

Characteristics of lead-acid and nickel metal hydride batteries in uninterruptible power supply operation

Delay-Dependent Stability Analysis of Modular Microgrid With Distributed Battery Power and SoC Consensus Tracking

Control Strategy Analysis of a Novel Transformerless Unified Power Quality Controller Based on Ultracapacitor and TRIAC

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