Overview
The function “Stator ground fault protection with 3rd harmonic” detects stator ground faults in the generator neutral point (approx. 10% to 25%). It is used for generators in a unit connection and evaluates the 3rd harmonic of the residual voltage (zero voltage V0 3 harm). This function can only be used if the generator has generated sufficient 3rd harmonics.
For more detailed information on “Stator ground fault protection with 3rd harmonic” function, refer to SIPROTEC 5 devices, V8.30 & higher manuals.
To see other supported functions, click here.
Structure/Embedding of the Function
Possible Assignment of the Stage Types to the Measuring Points of the Function Group Generator Stator
Setting Parameters
General setting parameters
| Addr. | Parameter | C | Setting Options | Default Setting |
| General | ||||
| _:2311:101 | General:Threshold P min | 0.0 % to 100.0 % | 40.0 % | |
| _:2311:102 | General:Threshold V1 min | 0.300 V to 200.000 V | 46.000 V | |
| _:2311:103 | General:Corr. factor for V03H> | 0.000 V to 40.000 V | 0.000 V | |
| _:2311:104 | General:V03H Gen./ V03H neut. pt | 0.10 to 10.00 | 1.00 | |
| _:2311:105 | General:Corr. factor for ΔV03H> | – 40.000 V to 40.000 V | 0.000 V | |
| _:2311:106 | General:Dropout delay | 0.00 s to 60.00 s | 1.00 s | |
Setting parameters for Stage V0 3rd Harm. <
| Addr. | Parameter | C | Setting Options | Default Setting |
| V0 3. Harm< 1 | ||||
| _:16801:1 | V0 3. Harm< 1:Mode | off on test |
off | |
| _:16801:2 | V0 3. Harm< 1:Operate & flt.rec. blocked | no yes |
no | |
| _:16801:101 | V0 3. Harm< 1:Threshold | 0.300 V to 100.000 V | 1.000 V | |
| _:16801:102 | V0 3. Harm< 1:Dropout delay | 0.00 s to 60.00 s | 0.00 s | |
| _:16801:6 | V0 3. Harm< 1:Operate delay | 0.00 s to 60.00 s | 0.50 s | |
Setting parameters for Stage V0 3rd Harm. >
| Addr. | Parameter | C | Setting Options | Default Setting |
| V0 3. Harm> # | ||||
| _:1 | V0 3. Harm> #:Mode | off on test |
off | |
| _:2 | V0 3. Harm> #:Operate & flt.rec. blocked | no yes |
no | |
| _:101 | V0 3. Harm> #:Threshold | 0.300 V to 100.000 V | 10.000 V | |
| _:102 | V0 3. Harm> #:Dropout delay | 0.00 s to 60.00 s | 0.00 s | |
| _:6 | V0 3. Harm> #:Operate delay | 0.00 s to 60.00 s | 0.50 s | |
Setting parameters for Stage ΔV0 3rd Harm. >
| Addr. | Parameter | C | Setting Options | Default Setting |
| ΔV0 3. Harm> # | ||||
| _:1 | ΔV0 3. Harm> #:Mode | off on test |
off | |
| _:2 | ΔV0 3. Harm> #:Operate & flt.rec. blocked | no yes |
no | |
| _:101 | ΔV0 3. Harm> #:Threshold |
0.300 V to 100.000 V | 3.000 V | |
| _:102 | ΔV0 3. Harm> #:Dropout delay | 0.00 s to 60.00 s | 0.00 s | |
| _:6 | ΔV0 3. Harm> #:Operate delay | 0.00 s to 60.00 s | 0.50 s | |
Logic Diagrams & highlights
Course of the 3rd Harmonic along the Stator Winding
Logic Diagram Function Block General
Logic of the Stage V0 3rd Harm. <
Logic of the Stage V0 3rd Harm. >
Correction factor for V03H>
3rd Harmonic of the Voltage (Secondary) as a Function of the Active Power (Reactive Power as a Parameter)
Logic of the Stage V0 3rd Harm. Delta
Connection type recommendation & Difference method calculations
Correction factor for ΔV03H>
