Substation and industrial automation connects relays, equipment and the control system so the operator can see and command everything from the control room. ENP configures, tests and commissions both substation automation (IEC 61850 and SCADA) and industrial distributed control systems (DCS), from relay configuration to signal testing in the control room.

Substation automation architecture

Level	Equipment	Role
Process level	CT/VT, breaker, disconnector, merging unit	Measurement and command of primary equipment
Bay level	Relays and bay controllers (IEDs)	Protection, control and measurement for each feeder
Station level	Gateway, HMI, local SCADA server, GPS	Data collection and link to the control centre
Network level	Industrial switches, optical fibre	Communication with redundancy

IEC 61850 and protocols

Protocol	Application
IEC 61850 MMS	Relay to server and HMI (measurements, events, commands)
GOOSE	Fast peer-to-peer messages between relays (interlock, trip, block) within milliseconds
Sampled Values	CT/VT samples over the network (digital substation)
IEC 60870-5-101/104	Link to control centre and dispatch
DNP3	SCADA link in distribution and industrial networks
Modbus RTU/TCP	Link to instruments, meters and PLCs

ENP work here includes creating and editing SCL files (ICD / CID / SCD), dataset and report configuration, GOOSE mapping, time synchronization (SNTP/PTP), communication testing with tools such as IEDScout and Wireshark, and GOOSE testing with real injection.

Brands and software covered

Brand	Relay / IED	Control and SCADA
Siemens	SIPROTEC 4 / 5 (DIGSI software)	SICAM PAS, SICAM 230, SICAM A8000, Spectrum Power
ABB / Hitachi Energy	Relion series (PCM600 software)	MicroSCADA Pro, System 800xA
Schneider Electric	Easergy, MiCOM	EcoStruxure Power SCADA, ADMS
General Electric (GE)	Multilin series	EnerVista, iCS
SEL	700 series	SEL Real-Time Automation Controller

Distributed control systems (DCS)

A DCS controls an industrial process (refinery, petrochemical, steel, cement, power plant) with distributed controllers, a communication network and operator stations. In many projects the electrical side (relays, breakers and motor control centres) must also be connected to the DCS so the process operator sees the electrical status from the same screen.

Brand	DCS system
Siemens	SIMATIC PCS 7 with WinCC for operator screens
ABB	System 800xA
Honeywell	Experion PKS
Yokogawa	CENTUM VP
Emerson	DeltaV

Note: in some companies "PDCS" refers to the Siemens power control and monitoring system and "DCS" to process control. The exact scope is defined in the contract.

ENP activities in DCS

Loop check: from sensor and transmitter to the operator screen
I/O test: digital and analogue I/O cards, 4 to 20 mA signals and saturation tests
Cause & effect and interlock logic testing: based on the C&E matrix
Electrical integration: connecting relays and MCCs to the DCS with Modbus, PROFIBUS, PROFINET or IEC 61850
Power management and load shedding: testing loss-of-source scenarios
FAT and SAT: factory and site acceptance tests with formal minutes
Operator screens and alarms: graphics review, alarm priority and sequence of events (SOE)

Network and security

PRP and HSR communication redundancy for critical substations
Time synchronization for accurate event recording
Network segregation, firewalls and access control per IEC 62443 and IEC 62351
Project backup, version control and recovery

Deliverables

Final configuration files, a tested signal list, FAT/SAT reports, network documentation with address plan, and operator training.

Scope of work

IEC 61850 configuration (SCL, GOOSE, MMS) and communication testing
Siemens relays and SCADA (SICAM PAS, SICAM 230, DIGSI)
IEC 104, DNP3 and Modbus protocols
DCS: loop check, I/O test and cause & effect matrix
Electrical integration with DCS (PCS 7, 800xA, DeltaV and others)
Power management, load shedding, FAT and SAT

Substation Automation, Communications & SCADA/DCS Integration