A DC Link-Based Approach to Realize Zero Feed-in under Both Static and Dynamic Power System Events

Paspatis, A ORCID: https://orcid.org/0000-0002-3479-019X, Adebisi, Bamidele ORCID: https://orcid.org/0000-0001-9071-9120, Orfanoudakis, G, Siderakis, K, Karapidakis, E and Hatziargyriou, Nikos (2024) A DC Link-Based Approach to Realize Zero Feed-in under Both Static and Dynamic Power System Events. In: 2024 IEEE 18th International Conference on Compatibility, Power Electronics and Power Engineering (CPE-POWERENG), pp. 1-6. Presented at 2024 IEEE 18th International Conference on Compatibility, Power Electronics and Power Engineering (CPE-POWERENG), 24 June 2024 - 26 June 2024, Gdynia, Poland.

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Abstract

Two factors significantly limiting the increased inter-connection of distributed energy resources in distribution systems are related with the thermal and the short-circuit limits of the primary substations. Even though the zero feed-in approach can address the limitations originating from the thermal limits, the short-circuit limitation issue can not be tackled by this solution. Hence, the short-circuit limitation of primary substations has evolved as the most critical limiting factor in further increasing the distributed energy resources in the distribution system. To address this issue, a novel solution is proposed in this paper, through a DC-link topology that can maintain the zero feed-in conditions of distributed energy resources, during both static and dynamic power system events. The proposed solution is thoroughly described, validated and compared with the conventional zero feed-in approach through simulations in MATLAB/Simulink. It is shown that it can inherently achieve zero current injection to the grid under a short-circuit, while it offers several other advantages, such as fault ride-through and immunity to several grid voltage disturbances.