ABB The iron ore mine at Malmberget SVC for voltage support, power factor control and power quality improvement 指导原则(英语).pdf

The iron ore mine at Malmberget: SVC for voltage support, power factor control and power quality improvement An SVC came on line in 2013 at LKAB’s underground mining With the SVC in operation, a stabilization as well as increase facility at Malmberget in the north of Sweden, the second of the mining bus voltage level have been established. SVC for mining supplied to LKAB by ABB in just a couple of years. It is a turnkey installation, rated at 21.5 kV, 0-41 Mvar The SVC is designed to fulfil the following performance requi - capacitive, and with all indoor equipment housed in a pre-fa- rements with all six mine hoists accelerated simultaneously: bricated container. Its purposes are stabilizing the feeding voltage to the mine during varying load cycles, power factor Power factor ≥ 0.99 at the 21.5 kV bus correction as well as power quality improvement in conjunc- tion with planned extensions of the ore mining capacity. The Flicker, Pst (95%) ≤ 1.0 at the PCC SVC has been designed to cope with an ambient temperature span of -40 to +40 deg. C. Max voltage variation caused by the hoists (95%) 1.0 % at the 21.5 kV bus As space is scarce in the substation, the SVC is located some distance away and connected to the 21.5 kV mine bus via Total voltage distortion (95 %) ≤ 1.5 % at the PCC 600 m power cables, a well proven solution in cases like this. Total current distortion (95%) ≤ 5 % at the 21.5 kV bus and The load to be compensated by the SVC consists of six mine the PCC hoists connected to the 21.5 kV bus, four AC converter hoists each rated at 3.99 MW and two 6-pulse DC converter hoists rated each at 8.15 MW, altogether