A d-axis based current differential protection scheme for an active distribution network

Protection and Control of Modern Power Systems

Maoran Zheng¹  Guibin Zou²  Chenghan Zhou²  Lindong Zang²  Tao Du³ 

[1] Power Dispatching and Control Center, China Southern Power Grid;School of Electrical Engineering, Shandong University;Shandong Shanda Electric Power Technology Co. LTD;

关键词: Inverter-interfaced distributed generator;    Active distribution network;    D-axis current;    Differential protection;    Sampling value;   

DOI  :  10.1186/s41601-022-00243-0

来源: DOAJ

【 摘 要 】

Abstract The emergence of distributed generators has changed the operational mode and fault characteristics of the distribution 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.

【 授权许可】

Unknown