Comparison and Analysis of Receiving-End Connection Modes for Large-Capacity HVDC

doi:10.3969/j.issn.1000－7229.2017.04.015

Abstract

Abstract: ABSTRACT： This paper firstly analyzes the structural characteristics of three connection modes for large-capacity high voltage direct current （large-capacity HVDC） systems: general connection mode （GCM）, separate poles mode （SPM） and hierarchical connection mode （HCM）, compares the impacts of these three connection mode on the multi-feed short-circuit ratio （MISCR） of other DC systems and obtains the constraint conditions of placement selection, which can improve the voltage supporting ability of receiving-end AC system for DC system, and better balance the contradiction between the short circuit current limiting and multi-feed short-circuit ratio （MISCR）. And then this paper puts forward a margin receiving indicator of steady-state stability to evaluate the DC power absorbing ability of receiving system based on the maximum power curve method. Finally, combing with the 2020 planning data from the China Southern Power Grid, this paper compares and analyzes the advantages and disadvantages of the 3 access modes from several aspects, which can provide decision reference and technical support for the planning of DC system access mode.

Key words: large-capacity HVDC, general connection mode （GCM）, separate poles mode （SPM）, hierarchical connection mode （HCM）, multi-feed short-circuit ratio （MISCR）, margin receiving indicator of steady-state stability

CLC Number:

TM 721.1

ZHU Lin, GAO Qin, CAI Zexiang, ZHANG Donghui, JIN Xiaoming, ZHOU Baorong. Comparison and Analysis of Receiving-End Connection Modes for Large-Capacity HVDC

[J]. Electric Power Construction, 2017, 38(4): 112-.

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