| Citation:Lindong Zang,Guibin Zou,Chenghan Zhou,Maoran Zheng,Tao Du.A d-axis based current differential protection scheme for an active distribution network[J].Protection and Control of Modern Power Systems,2022,V7(2):338-348[Copy] |
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| Abstract: |
| The emergence of distributed generators has changed the operational mode and fault characteristics of the distribu
tion network, in a way which can severely influence protection. This paper proposes a d-axis-based current differential
protection scheme. The d-axis current characteristics of inverter-interfaced distributed generators and synchronous
generators are analyzed. The differential protection criterion using sampling values of the d-axis current component
is then constructed. Compared to conventional phase-based current differential protection, the proposed protection
reduces the number of required communication channels, and is suitable for distribution networks with inverter
interfaced distributed generators with complex fault characteristics. Finally, a 10 kV active distribution network model
is built in the PSCAD platform and protection prototypes are developed in RTDS. Superior sensitivity and fast speed
are verified by simulation and RTDS-based tests. |
| Key words: Inverter-interfaced distributed generator, Active distribution network, D-axis current, Differential
protection, Sampling value |
| DOI：10.1186/s41601-022-00243-0 |
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| Fund:This work was supported by China Southern Power Grid Technology Project. |
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