Commissioning The Grid Droop Control; Black Start In An Island Grid - Siemens SINAMICS S120 System Manual

7.7

Commissioning the grid droop control

For commissioning the grid droop control, reference is made to Chapter Commissioning
example for an infeed with voltage and frequency control for an island grid. (Page 70) and
the general function chapter (Function module for grid droop control (Page 35)).
7.7.1

Black start in an island grid

Preconditions
Binector output r0863.1 is used to control the circuit breaker to connect the infeed and island
grid.
Grid droop control operation (p5401) must be activated.
Black start sequence
1. r5482 = 1: Black start wait
The system waits for the switch-on command (p0840).
The island grid black start must be activated (p5580 = 2, 3).
Transformer test operation must be deactivated (p5480 ≤ 1).
2. r5482 = 100: Black start grid test
A check is made as to whether the absolute value of the grid voltage of the island grid
(r0072[2]) is less than the voltage limit in p5586[0].
3. r5482 = 102: Black start demagnetization ramp runs
The demagnetization ramp is used to dissipate energy that may still be stored in the line
filter of the Active Interface Module.
4. r5482 = 103: Black wait for voltage threshold
A check is made as to whether the absolute value of the grid voltage of the island grid
(r0072[2]) is less than the voltage limit in p5586[0] within the time in p5581[3].
5. r5482 = 104: Black start wait for circuit breaker enable
The system waits for the circuit breaker to be enabled to connect the infeed with the
island grid (p5483) and the grid droop control to be activated (p5401).
The feedback signal must be connected via p0860. The status is indicated in r0863.1.
6. r5482 = 105: Black start wait circuit breaker bounce time
The system waits for the bounce time of the circuit breaker to connect the infeed with the
island grid (p5581[1]).
7. r5482 = 106: Black start wait for grid control active
The system waits for the grid droop control to run up (r5402.1 = 1).
8. r5482 = 107: Black start magnetization ramp
The voltage of the infeed is increased up to the rated voltage via a parameterizable run-
up time (p5581[0]).
The existing grid droop control is used to compensate for load fluctuations in the island
grid.
Grid infeed
System Manual, 04/2015, A5E03347436A
7.7 Commissioning the grid droop control
Commissioning
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