June 21, 2006
Manitoba HVDC Research Centre 1
Manitoba HVDC Research Centre
Distribution System Analysis
Panel Session – Induction Machine Modeling
IEEE PES AGM Montreal
June 21, 2006
Paul Wilson
Authors: Dr. Santoso, Dr. Muthumuni, Jen Z. Zhou
June 21, 2006
Manitoba HVDC Research Centre 2
June 21, 2006 Manitoba HVDC Research Centre 2
Agenda
1. Introduction
2. System Modeling
3. Power Flow Validation
4. Wind Generator Modeling
5. Slip and Power Flow Results
6. Short-Circuit Analysis
7. Conclusions
June 21, 2006
Manitoba HVDC Research Centre 3
June 21, 2006 Manitoba HVDC Research Centre 3
Introduction
1. IEEE 34-Bus Test Feeder
800
806 808
812
814
810
802
850
818
824
826
816
820
822
828 830
854 856
852
832
838
862
840
836
860
834
842
844
846
848
864
858
888
890
T2
G2
G1
T1
Key points:
-PSCAD Model was built of the IEEE 34 Bus test system.
-Model include all transformers, regulators plus controls, induction generators,
loads, distribution lines, and wind turbines.
-Model power flows are validated against the benchmarks.
-The case was solved in 114s for a 6s run using a time step of 250us (no induction
machines). The same case with induction machines solved in 181s.
June 21, 2006
Manitoba HVDC Research Centre 4
June 21, 2006 Manitoba HVDC Research Centre 4
Distribution System Modeling
1. Unbalanced Distribution Line
2. Distributed loads
3. Phase load (constant pq, Z, and I)
4. Phase to Phase load
5. Regulators and controls
Key points:
-The first test case included these elements to validate against a power flow.
-Subsequent slides document what was done for each element.
June 21, 2006
Manitoba HVDC Research Centre 5
June 21, 2006 Manitoba HVDC Research Centre 5
1. Unbalanced Distribution Line
{ A mutually coupled wires are used
{ Z & B matrices are directly entered
System Modeling
300
Key points:
-Each type of standard construction was modeled. Six types of construction models
included 300, 301, 302, 303, 304 and 305.
-Specification of Susceptance (B) values precluded use of standard models, thus a
new component was created to address the tightly coupled unbalanced distribution
line.
-The lack of long transmission lines enforces a large and tightly couple matrix in this
analysis. This makes it difficult for an efficient solution in the time domain when
transmission line boundaries can not be used to form subsystems.
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