"GENROU (xl <= xd2) out of typical upper limit ".What this message means?

[m-jam20]

Hi,

After running ieee39_full.xlsx, I gt this message:

Input file parsed in 0.0733 seconds.
System internal structure set up in 0.0384 seconds.
-> System connectivity check results:
No islanded bus detected.
System is interconnected.
Each island has a slack bus correctly defined and enabled.

-> Power flow calculation
Numba: Off
Sparse solver: KLU
Solution method: NR method
Power flow initialized in 0.0034 seconds.
0: |F(x)| = 7.561234472
1: |F(x)| = 2.916445037
2: |F(x)| = 0.1312866396
3: |F(x)| = 0.0003487368405
4: |F(x)| = 4.215688243e-09
Converged in 5 iterations in 0.0071 seconds.
Report saved to "ieee39_full_out.txt" in 0.0083 seconds.
GENROU (xl <= xd2) out of typical upper limit.

idx | values | limit
-----------+--------+------
GENROU_1 | 0.012 | 0.001
GENROU_2 | 0.042 | 0.036
GENROU_3 | 0.036 | 0.003
GENROU_4 | 0.025 | 0.001
GENROU_5 | 0.050 | 0.001
GENROU_7 | 0.031 | 0.002
GENROU_8 | 0.029 | 0.006
GENROU_9 | 0.018 | 0.001
GENROU_10 | 0.003 | 0.000

Initialization for dynamics completed in 0.0415 seconds.
Initialization was successful.

[cuihantao]

This is a warning that will not impact the numerical results.

In a typical generator model, the leakage reactance xl is smaller than the subtransient reactance xd''. There may be parameter issues needing correction for this test case.

[m-jam20]

Thanks.

I have used ieee39_full.xlsx provided in "https://github.com/CURENT/andes/tree/master/andes/cases/ieee39".

You mean there might be parameter issues in this xlsx file?

[m-jam20]

I also get this when I want to run the model with 0.8 of load. It would be great if you could guide me about it.

Report saved to "ieee39_full_out.txt" in 0.0079 seconds.
GENROU (xl <= xd2) out of typical upper limit.

idx | values | limit
-----------+--------+------
GENROU_1 | 0.012 | 0.001
GENROU_2 | 0.042 | 0.036
GENROU_3 | 0.036 | 0.003
GENROU_4 | 0.025 | 0.001
GENROU_5 | 0.050 | 0.001
GENROU_7 | 0.031 | 0.002
GENROU_8 | 0.029 | 0.006
GENROU_9 | 0.018 | 0.001
GENROU_10 | 0.003 | 0.000

Suspect initialization issue! Simulation may crash!

    Name          | Var. Value | Eqn. Mismatch

----------------------+------------+--------------
LL_y TGOV1N TGOV1 10 | 17.879 | -5.290

Initialization for dynamics completed in 0.0381 seconds.
Initialization failed!!
If you are developing a new model, check the initialization with
andes -v 10 run -r tds --init /Users/mypc/PycharmProjects/andes_power_system_tool_project/andes_github/andes/cases/ieee39/ieee39_full.xlsx

[m-jam20]

My goal is to have different load levels set to 90%, 100%, 110%, and 120% of its base value. also to maintain the power balance, the output power of the generators should be correspondingly adjusted. Which parameters of the Generators should be modifies for this?

[jinningwang]

The IEEE 39-bus dynamic case is synthetic from experience. Feel free to modify the parameters when necessary.

Regarding the generator or load setting points, I believe there have been some discussions. Check discussion compass for more details.