A Distributed Cooperative Control Based on Consensus Protocol for VSC-MTDC Systems



Wang, Weiyu, Yin, Xin, Cao, Yijia, Jiang, L ORCID: 0000-0001-6531-2791 and Li, Yong
(2021) A Distributed Cooperative Control Based on Consensus Protocol for VSC-MTDC Systems. IEEE Transactions on Power Systems, 36 (4). p. 1.

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Abstract

A distributed cooperative control (DCC) strategy based on the consensus protocol is proposed for providing frequency support through voltage source converter based multi-terminal direct current transmission (VSC-MTDC) systems. The DCC consists of a local P-V droop controller and a cooperative agent network for cooperation control. Each agent controller is composed of a frequency regulation subagent (FRA) for frequency support and a load ratio subagent (LRA) for balancing the power sharing amongst the stations connected to the same ac grid. Moreover, to reduce the impact of the communication link failure, a topology evaluating method is proposed to select the suitable topology of the communication network via graph theory. The small signal stability analysis and the steady-state analysis are performed to investigate the stability and the consensus performance of the VSC-MTDC systems with DCC. Compared with decentralized control, the DCC can simultaneously achieve better frequency support and power sharing without leading to a large dc voltage deviation. The effectiveness of the DCC is verified by simulations on a hybrid ac/dc grid with a 7-terminal VSC-MTDC in DIgSILENT/PowerFactory under the load step change event and communication failure event.

Item Type: Article
Uncontrolled Keywords: Power conversion, Converters, Frequency control, Voltage control, Topology, Decentralized control, Communication networks, Consensus cooperative control, communication networks, frequency regulation, VSC-MTDC
Depositing User: Symplectic Admin
Date Deposited: 18 Jan 2021 09:38
Last Modified: 18 Jan 2023 23:03
DOI: 10.1109/tpwrs.2021.3051770
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3113804