Phased lock loop control for multiple inverters connected to a polyphase grid

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United States of America Patent

PATENT NO 9837931
SERIAL NO

15307809

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Abstract

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A steady state control method for a three-phase double-mode inverter. Off-grid steady state control is composed of outer loop power droop control, voltage feed-forward quasi-resonant control, and inner current loop dead-beat control. Therefore, the response speed of the inverter is raised, and the influence caused by the load fluctuation of a micro-grid is inhibited. Based on the off-grid steady state control, grid-connected steady state control introduces phase lead control to the power droop control. Therefore, the output voltage of the inverter is always slightly ahead of the power grid voltage, which avoids the energy pour backward phenomenon of the inverter due to a phase error, and realizes stable and reliable running in the grid-connected mode.

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Patent Owner(s)

Patent OwnerAddress
HUNAN UNIVERSITY410000 SHANMEN LUSHAN SOUTH ROAD YUELU DISTRICT CHANGSHA CITY HUNAN PROVINCE CHANGSHA CITY HUNAN PROVINCE 410000
CHANGSHA BOLI ELECTRIC CORPORATIONHIGH AND NEW TECHNOLOGY INDUSTRIAL DEVELOPMENT ZONE CHANGSHA HUNAN 410082

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chen, Yandong Changsha, CN 14 724
Chen, Zhiyong Changsha, CN 95 353
Huang, Yuan Changsha, CN 63 116
Kuang, Huimin Changsha, CN 1 12
Li, Mingshen Changsha, CN 3 14
Luo, An Changsha, CN 18 605
Wang, Mingyue Changsha, CN 25 90
Zhong, Qingchang Sheffield, GB 11 68
Zhou, Leming Changsha, CN 3 14
Zhou, Xiaoping Changsha, CN 78 905

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