Three Phase Load Flow For Unbalanced Power Systems
| Main Authors: | Sugiarto, Sugiarto, Hadi, Sasongko Pramono, Tumiran, Tumiran |
|---|---|
| Format: | Article PeerReviewed application/pdf |
| Bahasa: | eng |
| Terbitan: |
P3M STTA
, 2011
|
| Subjects: | |
| Online Access: |
https://repository.ugm.ac.id/32745/1/15_-_Three_Phase_Load_Flow_For_Unbalanced_Power_Systems.pdf https://repository.ugm.ac.id/32745/ |
Daftar Isi:
- Many load-flow analysis have the capability of solving large balanced transmission system using little computer memory and time processing. These tools are very efficient and accurate whan a three-phase power system can be represented by its positive-sequence equivalent circuit. Transmission systems at the appearance of unbalanced voltages and currents in the occurence of long untransposed transmission lines, asimetrical parameters in three-phase transformers or inconcistanced loading formed by users are unbalanced, which makes the utilization of fast iterative sweep solvers for their analysis very attractive. The efficiency reached by most load-flow software overcomes the lack of accuracy and precision caused by modelling simplifications and assumptions made by both transmission simulation software. Typical system features and assumptions are: uncoupled devices, balanced loads, perfect networks and solving complex integrated transmission and distribution (although its model uses a composite load model, such an injected transformer bus or IBT) systems has substantially increased among the operating and power system speciallist. The contribution of the present research work consist in the development of a multi-phase load-flow algorithm with the capability to model any coupled devices and network features found in power systems along with to solve all the complexities mentioned above. The proposed methodology utilizes a positive sequence-based on the sequence component frame and power balance load-flow solver. It relies on the use of positive-sequence equivalent circuits to represent all multi-phase electro-magnetically coupled devices found in transmission and distribution networks. To show an assessment of the proposed three phase load flow into unbalance problem, 5-bus-transmission networks were tested. The test case result discloses that solving the load flow problems with Newton-Raphson can considerably work by simulation programs when comparing with some percentages of unbalanced load of the test network