Specialkursus JH/IAA - 2009-08-04
Title:
Protection systems modelling in PSCAD
Description:
The objective of this project is to implement a protection system in PSCAD. Here different models of current transformers, voltage transformer, faults, relays and tripping signals are expected to be used. The current and voltage transformer models will be developed by the parallel project “Inductive instrument transformers modelling in PSCAD”. Several fault and relay models are available in PSCAD, however if necessary logical gates can be used to create desired protection systems and control algorithms. This project is in cooperation with DONG Energy; hence a contact person from DONG will participate in meetings and assist with suggestions and data throughout the project. The first part of the project is to make literature study on: -voltage transformers -current transformers -relays -faults -available models in PSCAD since previous work has been done to incorporate different components in electromagnetic transient simulations, however no standard procedure is been used in the industry to validate the behaviour and capabilities of the protection system. The second part of the project is to create a digital model of the protection system in an offshore wind farm in PSCAD, using the available information. The third part of the project is to test the voltage, current and frequency capabilities of the model under several fault conditions, and do a sensitivity analysis varying several parameters in the model e.g. saturation, model, algorithm, filtering, A/D conversion, time delays, etc. References: [1] Cosse, R.E.; R.E.; Dunn, D.G.; D.G. ; Spiewak, R.M.; R.M.; Bowen, J.E.:” J.E.:” CT saturation calculations - are they applicable in the modern world? - Part III, low-ratio, highcurrent CT/microprocessor relay comparisons at a high-current testing laboratory”, 2008. [2] Cosse, R. E.; E.; Dunn, D. G.; G. ; Spiewak, R. M.: M. : ” CT Saturation Calculations: Are They Applicable in the Modern World?—Part I: The Question”, 2007.
Specialkursus [3] Cosse, R.E.; Dunn, D.G.; Spiewak, R.M.; Zocholl, S.E.; Hazel, T.; Rollay, D.T.: ” CT Saturation Calculations - Are they Applicable in the Modern World? - Part II, Proposed Responsibilities”, 2007. [4] Wang, Chun; Crossley, Peter A.; Parker, Adrian D.: ” Design and evaluation of an EMTDC digital current transformer model”, 2000. [5] Rezaei-Zare, A.; Iravani, R.; Sanaye-Pasand, M.; Mohseni, H.; Farhangi, S.: ” An Accurate Current Transformer Model Based on Preisach Theory for the Analysis of Electromagnetic Transients”, 2008. Content: •
Theoretic study based on previous work
•
Model different protection elements in PSCAD using available information
•
Sensitivity analysis
Period:
Fall 2009
Point:
10 -15
Evaluation:
Report, 7-scale
Student:
NN
Supervisor:
J. Holbøll, DTU; Ivan Arana, DONG Energy
