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Ngồn ngữ mô hình hóa hệ thống điện trên Phần mềm PSSE.NỘI DUNG CHÍNH PHẦN 10 (Assembly of System Models): 1. Reduced Power System. 2. NonStandard Models using FORTRAN. 3. Introduction to Graphical Model Builder (GMB).
eBook for You TRANSMISSION & DISTRIBUTION A Division of Global Power POWER SYSTEM STABILITY CALCULATION TRAINING Day D 6- A Assembly of System Models bl f S t M d l Prepared by: Mohamed El Chehaly November 22, 2013 OUTLINE • Non-Standard Models using FORTRAN Non Standard • Introduction to GMB eBook for You • Reduced Power System REDUCED POWER SYSTEM eBook for You REDUCED POWER SYSTEM Equivalents represent a reduced network that contains few original buses and all boundary buses Study system: Buses subject to detailed study; all components are represented explicitly External system: Buses and branches that connect to and influence a study system but not need to be represented Boundary buses: buses in the study system that connect to external systems through branches eBook for You Equivalents REDUCED POWER SYSTEM eBook for You Equivalents REDUCED POWER SYSTEM Steps for Equivalent Network Verify that in the study system there is at least one swing b i bus If there is at least one swing bus, skip this step 3 If no swing buses assign a generator bus (code buses, 2) in the study system to be a new swing bus (code 3) Solve the load flow No changes to the power levels should be observed eBook for You Swing buses in the study system REDUCED POWER SYSTEM Steps for Equivalent Network Change all the swing buses (code 3) in the external system to generator buses (code 2) t l t t t b ( d Add loads on the boundary buses corresponding to the power flows of the tie lines that connect the boundary buses to the external system (DO NOT SOLVE) Disconnect th ti li Di t the tie lines th t connect th that t the boundary buses to the external system eBook for You Swing buses in the external system REDUCED POWER SYSTEM Steps for Equivalent Network After disconnecting the tie lines, solve the load flow fl The load flow could not be solve due to the large number of islanded buses The following message should appear: Message for API FDNS #### buses in island(s) without a swing bus Use activity TREE eBook for You Removal of External Buses REDUCED POWER SYSTEM Steps for Equivalent Network Islanded buses eBook for You Write TREE in the CLI window The following message should appear: To disconnect the island, write ‘1’ in the CLI Repeat until all islands are disconnected 10 REDUCED POWER SYSTEM Steps for Equivalent Network Determine the short-circuit levels (three-phase and single line to ground) at the boundary buses single-line-to-ground) in the original system both in physical output (MVA and A) and in per unit (pu) and in polar coordinates Add a dummy generator at the boundary bus of y power and a the modified system with zero p calculated impedance to match the original shortcircuit level eBook for You Short-circuit levels Sh t i it l l 74 NON-STANDARD MODELS USING FORTRAN Hai Phong Exciter KA E FD STATE K VR sT A K V STATE K DSTATE K A R TA VR eBook for You Third state STATE(K+2) 75 NON-STANDARD MODELS USING FORTRAN Hai Phong Exciter DSTATE K 3 K F STATE K STATE K 3 TF VFEED DSTATE K 3 VFEED STATE(K+2) eBook for You Fourth state STATE(K+3) Neglect the s in sKF 76 NON-STANDARD MODELS USING FORTRAN Hai Phong Exciter MODE = (Initialization) STATE K EFD VREF EC E FD KA STATE K 3 E FD K F eBook for You STATE K EC E FD STATE K 1 KA 77 NON-STANDARD MODELS USING FORTRAN Hai Phong Exciter MODE = (Output) if EFD VRMIN , E FD VRMIN E FD STATE K eBook for You if EFD VRMAX , EFD VRMAX INTRODUCTION TO GMB eBook for You 78 79 INTRODUCTION TO GMB Powerful and easy tool to build dynamic model based on graphic representation of control block diagrams Advantages include Based on Microsoft Visio S Supports a wide range of d id f dynamic models i d l Uses common CAD functions plus large symbol library Model flexibility using 100+ control blocks g g y Knowledge of FORTRAN coding is not necessary eBook for You Graphical Model Builder (GMB) 80 INTRODUCTION TO GMB GMB is used to easily create complex dynamic models GMB becomes a drawing tool that is simple and quick for implementing, editing and documenting of dynamic models Models such as excitation systems (AVRs), turbine governors, power system stabilizers, stabilizers HVDC models FACTS models, models, models load models, transformer models, new source models (wind models, solar models…) eBook for You Graphical Model Builder (GMB) 81 INTRODUCTION TO GMB Graphical Model Builder (GMB) eBook for You Double-click on each block to enter data 82 INTRODUCTION TO GMB Graphical Model Builder (GMB) eBook for You FORTRAN-like terms can be used (IF, ELSE…) 83 INTRODUCTION TO GMB GMB also offers testing and debugging functions in the stand-alone mode A step function or a sinusoidal signal can be injected at each function After finishing the design and testing of the model, it can be used directly as a macro fil without the need for compiling file ith t th df ili and linking eBook for You Graphical Model Builder (GMB) 84 INTRODUCTION TO GMB Graphical Model Builder (GMB) eBook for You SEXS 85 INTRODUCTION TO GMB Graphical Model Builder (GMB) eBook for You ESAC8B (Basler DECS) in PSS®E 86 INTRODUCTION TO GMB Graphical Model Builder (GMB) eBook for You ESAC8B (Basler DECS) in GMB QUESTIONS? eBook for You 87 WE CARE about the health and safety of our employees, of those who work under our care, and of the people our projects serve WE CARE about our employees, their personal growth, career development and general wellwell being WE CARE about the communities where we live and work and their sustainable development, and we commit to fulfilling our responsibilities as a global citizen WE CARE about the environment and about conducting our business in an environmentally responsible manner WE CARE about the quality of our work eBook for You WE CARE embodies SNC-Lavalin’s key corporate values and y p beliefs It is the cornerstone of everything we as a company Health and safety, employees, the environment, communities and quality: these values all influence the decisions we make every day And importantly, they guide us in how we serve our clients and therefore affect how we are perceived by our external partners WE CARE is integral to the way we perform on a daily basis i b th b i It is both a responsibility and a source of satisfaction and ibilit d f ti f ti d pride by providing such important standards to all we ... study system The only swing bus connected to it is HBINH_H1 (bus 28 610) located in the North A new generator bus is chosen to be an additional swing bus: PMY_1_S4 (bus 52040) Solve the... appear: To disconnect the island, write ‘1’ in the CLI Repeat until all islands are disconnected 10 REDUCED POWER SYSTEM Steps for Equivalent Network Determine the short-circuit levels (three-phase... solved for all sequence impedances 1 X machine X complete X equivalent The result is Base: 100 MVA X 0.02518 pu X 0.02525 pu X 0.04389 pu eBook for You Short-circuit levels Sh t i it