Over-voltage Limiter of an Inverter to Improve Microgrid Reliability during Unpredictable Cases

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Hossain, MA
Pota, HR
Haruni, AMO
Hossain, MJ
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2016
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Melbourne, AUSTRALIA

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Abstract

Equal rating inverters operating with different power set points may experience circulating power during unpredictable cases such as faults on a heavy load site due to a large mismatch between load consumption and power generation. This momentarily circulating power increases the dc-link voltage of the inverter and exceeds the voltage limit, leading to inverter shutdown for safety purposes. To overcome this issue, this paper proposes a control method that limits the dc-link voltage of an inverter during unusual events by using a series connected resistor with a switch across the dc-link capacitor. A detailed simulation is performed using Matlab/SimPowerSystems to validate the concept presented and justify the effectiveness of the control approach.

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2016 IEEE INNOVATIVE SMART GRID TECHNOLOGIES - ASIA (ISGT-ASIA)

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Electrical engineering

Electronics, sensors and digital hardware

Science & Technology

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Computer Science, Interdisciplinary Applications

Engineering, Electrical & Electronic

Computer Science

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Hossain, MA; Pota, HR; Haruni, AMO; Hossain, MJ, Over-voltage Limiter of an Inverter to Improve Microgrid Reliability during Unpredictable Cases, 2016 IEEE Innovative Smart Grid Technologies - Asia (ISGT-Asia), 2016, pp. 406-411