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Technical Assessment of Load Commutation Switch in Hybrid HVDC Breaker
KTH, Skolan för elektro- och systemteknik (EES), Elektrisk energiomvandling.ORCID-id: 0000-0001-8788-0415
2015 (engelsk)Inngår i: IEEE transactions on power electronics, ISSN 0885-8993, E-ISSN 1941-0107, Vol. 30, nr 10, s. 5393-5400Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The development of a large-scale high-voltage direct current (HVDC) power grid requires a reliable, fast, and low-loss circuit breaker. The load commutation switch (LCS) is an essential part of ABB's 1200-MW hybrid HVDC breaker concept, which builds up a low-loss conducting path for the load current. The technical requirements for the LCS are expressed in this paper by studying the operation principle of the hybrid HVDC breaker. The voltage stress over the LCS is determined based on a dc grid with 320 and 2 kA rated voltage and current. A system model of the hybrid HVDC breaker is developed in PSCAD/EMTDC to study the design criteria for snubber circuit and arrester blocks. It is observed that conventional snubber circuits are not suitable for a bidirectional LCS as the current of snubber capacitors prevent the fast interruption action. A modified snubber circuit is proposed in this paper along with two more alternatives for the LCS to overcome this problem. Moreover, the power loss model for a semiconductor device is discussed in this paper based on the 4.5-kV StakPak IGBT. The model is used to calculate the conduction power losses for different LCS topologies. Ultimately, a matrix of 3 × 3 IGBT modules is selected to provide a reliable LCS design which can handle several internal fault cases with no interruption of operation. A full-scale prototype has been constructed and tested in ABB HVDC Center, Ludvika, Sweden. The experimental test results are also included in the paper in order to verify the calculation and simulation study.

sted, utgiver, år, opplag, sider
2015. Vol. 30, nr 10, s. 5393-5400
Emneord [en]
HVDC Grid, Semiconductor breaker, Solid state circuit breaker
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-170191DOI: 10.1109/TPEL.2014.2372815ISI: 000355258100009Scopus ID: 2-s2.0-84930639264OAI: oai:DiVA.org:kth-170191DiVA, id: diva2:828252
Merknad

QC 20150630

Tilgjengelig fra: 2015-06-30 Laget: 2015-06-29 Sist oppdatert: 2017-12-04bibliografisk kontrollert

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