Example project · examples/hydro

Example SCADA for a hydroelectric plant.

Design head
82 m
Units
2 × Francis 10 MW
Speed
600 rpm
Voltage
6.3 / 66 kV
Rated flow
14.5 m³/s per unit
Reservoir
Max. normal level 815 m
Overview
(01)Screens

Green means running, amber in transition and red tripped. On the single-line, red means closed and green open.

(02)Try it here

Start the unit, change the setpoint, stop it or trip it. The sequence follows the simulated PLC logic with compressed timings.

Stopped
  1. 1. Auxiliaries start
  2. 2. Inlet valve opening
  3. 3. Acceleration
  4. 4. Excitation
  5. 5. Synchronisation
  6. 6. On load
  7. 7. Unloading
  8. 8. Disconnection
  9. 9. Closing and braking
Speed0.0 %
Wicket gate0.0 %
Voltage0.00 kV
Power0.00 MW
O52G · Open

Event log

  • Press Start to begin.
(03)Communications

Siemens S7

PLC_G1

DB1 · 116 bytes · 250 ms

Commands, sequence, governor, protections and measurements of unit 1.

Siemens S7

PLC_G2

DB1 · same map · 250 ms

Same program and addresses as unit 1.

Siemens S7

PLC_SSCC

DB1 · 500 ms

Reservoir, spillway, intake, 66 kV substation and auxiliary services.

Modbus TCP

Contador_66kV

float32 + uint32 · 1 s

Boundary revenue meter: power, voltage, frequency and energy.

(04)Protections

SignalAlarmTrip
Guide bearing70 °C80 °C
Thrust bearing75 °C85 °C
Stator winding110 °C130 °C
Vibration4.5 mm/s7.1 mm/s
Oil pressure52 bar45 bar
Speed—115 %
66 kV grid—Loss with unit on line
(05)Training

  1. 01Start Unit 1 and follow the sequence to ON LOAD.
  2. 02Lower the setpoint to 3.5 MW and watch the rough-zone warning.
  3. 03Heat the thrust bearing: acknowledge the alarm and wait for the trip.
  4. 04Reset the 86 lockout and start again.
  5. 05Cause a grid loss with both units on load and recover the plant.
  6. 06Simulate a flood: the spillway opens by itself to hold the reservoir.
(06)Run it

The simulated PLCs ship inside abSCADA: no hardware needed.

  1. 01Download abSCADA for Windows and open abscada.exe.
  2. 02On the start screen, pick the example and keep «Also start its simulated PLC» ticked.
  3. 03Click Open runtime in Studio.
Download for Windows ↓Example guide in the manual →

Example scope

It is a teaching example, not a certified system. Timings are compressed (a start takes about 40 s), the reservoir reacts about 200 times faster than reality and the machine model is approximate. A real plant's protections live in relays and PLCs, never in the SCADA.