Nan Chen, Kunpeng Zha, Haitao Qu, et al. Economy Analysis of Flexible LCC-HVDC Systems with Controllable Capacitors[J]. CSEE Journal of Power and Energy Systems, 2022, 8(6): 1708-1719.
DOI:
Nan Chen, Kunpeng Zha, Haitao Qu, et al. Economy Analysis of Flexible LCC-HVDC Systems with Controllable Capacitors[J]. CSEE Journal of Power and Energy Systems, 2022, 8(6): 1708-1719.DOI: 10.17775/CSEEJPES.2022.01620.
Economy Analysis of Flexible LCC-HVDC Systems with Controllable Capacitors
Commutation failure (CF) is a frequent dynamic event at inverter of LCC-HVDC systems caused by AC side faults which can lead to inverter blocking
interruption of active power transfer
and even system blackout. To eliminate CFs and improve system performance
new Flexible LCC-HVDC topologies have been proposed in previous research but with limited analysis on its economic performance. Therefore
to further validate the applicability of Flexible LCC-HVDC topologies
this paper utilizes Life-Cycle Cost Analysis model to analyze the life-cycle cost of inverter stations for conventional LCC-HVDC
Capacitor Commutated Converter based HVDC (CCC-HVDC) topology and Flexible LCC-HVDC topologies including Controllable Capacitor based Flexible LCC-HVDC
AC Filterless Controllable Capacitor based Flexible LCC-HVDC and improved Flexible LCC-HVDC. Through a case study based on a 500 kV
1000 MW LCC-HVDC scheme
comparison results show that the AC Filterless Controllable Capacitor based Flexible LCC-HVDC topology and the improved Flexible LCC-HVDC topology have lower cost than the conventional LCC-HVDC and CCC-HVDC topologies
which proves that the elimination of CFs can be achieved with reduced cost.