Assignor:
LUKOIL Neftochim Burgas AD
Location:
Burgas
Assigned: July 2019 / Completed: January 2020
Project envisages modernization of the 6 kV Distribution Switchgear in Main Step-down Substation GPP-4, as well as modernization of the Substations supplied by the 6 kV Switchgear.
The following tasks are subject to implementation within this Project:
- Retrofit of breakers for transformer inputs, retrofit of section bays and output bays in the 6 kV Switchgear;
- Substitution of relay protection for output bays, and of relay protection for bus coupler breakers in the 6 kV Switchgear;
- Substitution of oil voltage measuring transformers with dry transformers in thе 6 kV Switchgear;
- Substitution of relay protection for output bays, and relay protection for bus coupler breakers in Substations;
- Redesign of installation diagrams for control, protection and signalizing of the Substations supplied by the 6 kV Switchgear. The purpose of redesign is a differential protection of feeder cables to be installed, and fast ATS (auto transfer switch) to be organized;
- Elaboration of relay cards for set-up relay protection;
- Construction of fiber-optic connection for the needs of longitudinal differential protection between GPP-4 and the Substations supplied by the 6 kV Switchgear of GPP-4;
Subject to execution within the Project are the following activities:
- Dismantle of existing equipment and constructions;
- Delivery and installing 6 kV electrical equipment: support isolators, vacuum circuit breakers, load breakers, voltage measuring transformers, current measuring transformers, surge arresters;
- Delivery of fiber-optic cables and cable racks for construction of fiber-optic cable routes;
- Construction and installing steel structures;
- Delivery and installing power, control and communication cables;
- Delivery and installing cable ducts;
- Manufacturing and installing electrical switchboards – communication panels, metering panels, relay panels and control switchboards;
- Commissioning fiber-optic cable routes;
- Installing and set-up digital relay protection;
- Control tests and measurements, putting all systems and equipment installed under operational use.
