Choir Substation Expansion — Relay Protection & SCADA System

Highlight: The 110 kV and 220 kV busbars each use a 6-system combined busbar scheme. Choir substation is one of the largest substations operated by NPDG PJSC in Mongolia.

Works performed:

Relay protection and automation solution design, installation, and commissioning for 7 x 110 kV lines
Relay protection and automation solution design, installation, and commissioning for 220/110/35 kV AT-1 and AT-2 transformers
Relay protection and automation solution design, installation, and commissioning for 7 x 220 kV lines
Relay protection and automation solution design, installation, and commissioning for 110 kV Busbars I, II, III, IV
Metering panel
Central alarm panel solution design, installation, and commissioning
SCADA and communication solution design, installation, and commissioning for the 220/110/35 kV Choir substation

Solutions used:

RED670, REL670, REL650 — Line, coupling, and busbar coupler protection; AT-1 and AT-2 backup protection
RET670 — AT-1 and AT-2 main protection
RTU540, RTU560 — Substation metering and measurement data processing and transmission
MicroSCADA Pro / MicroSCADA 9.4 SYS600
LANTIME M600 — GPS time system; all newly installed relays synchronized via SNTP protocol
Communication protocol: IEC61850-8-1
Power Spectrum SCADA system expansion using IEC60870-5-104 protocol to DUT LLC monitoring and information system