Title :
Fault-Tolerant Operation of a Battery-Energy-Storage System Based on a Multilevel Cascade PWM Converter With Star Configuration
Author :
Maharjan, Laxman ; Yamagishi, Tsukasa ; Akagi, Hirofumi ; Asakura, Jun
Author_Institution :
Dept. of Electr. & Electron. Eng., Tokyo Inst. of Technol., Tokyo, Japan
Abstract :
This paper focuses on fault-tolerant control for a battery-energy-storage system based on a multilevel cascade pulsewidth-modulation (PWM) converter with star configuration. During the occurrence of a single-converter-cell or single-battery-unit fault, the fault-tolerant control enables continuous operation and maintains state-of-charge balancing of the remaining healthy battery units. This enhances both system reliability and availability. A 200-V, 10-kW, 3.6-kW·h laboratory system combining a three-phase cascade PWM converter with nine nickel-metal-hydride battery units is designed, constructed, and tested to verify the validity and effectiveness of the proposed fault-tolerant control.
Keywords :
PWM power convertors; energy storage; fault tolerance; power system control; power system reliability; secondary cells; battery energy storage system; energy 3.6 kWh; fault tolerant control; fault tolerant operation; multilevel cascade pulsewidth modulation converter; multilevel cascade pwm converter; power 10 kW; single battery unit fault; single converter cell fault; star configuration; voltage 200 V; Availability; Batteries; Control systems; Energy storage; Fault tolerance; Fault tolerant systems; Maintenance; Pulse width modulation; Pulse width modulation converters; Reliability; Battery-energy-storage system (BESS); cascade converters; fault-tolerant control; neutral shift; state-of-charge (SOC) balancing;
Journal_Title :
Power Electronics, IEEE Transactions on
DOI :
10.1109/TPEL.2010.2047407
