DMCA
1 Stability Enhancement of Decentralized Inverter Control through Wireless Communications
| Citations: | 8 - 5 self |
BibTeX
@MISC{Microgrids_1stability,
author = {In Microgrids and Hao Liang and Student Member and Bong Jun Choi and Weihua Zhuang and Xuemin (sherman Shen},
title = {1 Stability Enhancement of Decentralized Inverter Control through Wireless Communications},
year = {}
}
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Abstract
Abstract—Decentralized inverter control is essential in distributed generation (DG) microgrids for low deployment/operation cost and high reliability. However, decentralized inverter control suffers from a limited system stability mainly because of the lack of communications among different inverters. In this paper, we investigate stability enhancement of the droop based decentralized inverter control in microgrids. Specifically, we propose a power sharing based control strategy which incorporates the information of the total real and reactive power generation of all DG units. The information is acquired by a wireless network (such as a WiFi, ZigBee, and/or cellular communication network) in a decentralized manner. Based on the desired power sharing of each DG unit and the acquired information of total generation, additional control terms are added to the traditional droop controller. We evaluate the performance of the proposed control strategy based on smallsignal stability analysis. As timely communication may not be established for a microgrid with low-cost wireless communication devices, two kinds of analytical models are developed with respect to negligible and nonnegligible communication delays, respectively. Extensive numerical results are presented to demonstrate the system stability under the proposed control strategy with respect to different communication delays. Index Terms—Delay, droop control, inverter, microgrid, smart grid, stability, wireless network. I.
Keyphrases
stability enhancement wireless communication decentralized inverter control control strategy dg unit wireless network limited system stability reactive power generation inverter control low deployment operation cost distributed generation high reliability decentralized manner desired power sharing inverter control suffers abstract decentralized inverter control extensive numerical result total generation traditional droop controller timely communication droop control system stability different communication delay cellular communication network low-cost wireless communication device index term delay different inverter smart grid additional control term nonnegligible communication delay analytical model smallsignal stability analysis
