Modeling distribution networks with neplan
0 likes984 views
The document outlines the objectives and methods of using NEPLAN software for modeling power distribution networks and analyzing technical losses. It discusses various power system analysis tools, including PSAT and several open-source software options, while emphasizing NEPLAN's features and advantages in load flow and dynamic simulations. The presentation also includes exercises and references aimed at enhancing the understanding of power loss calculations and network modeling.
Modeling distribution networks with neplan
- 1. Page 1 Project Highlights BY KHALIL Y. A. POWER DISTRIBUTION NETWORK MODELLING: NEPLAN/LOSS CALCULATION AUGUST, 2019
- 2. Objectives ▰Generally, to introduce the PSAT and NEPLAN, in particular on network modelling ▰ 1) Explain and illustrate the use of NEPLAN to model a simple distribution network. ▰ 2) Use the software to model a distribution network for load flow analysis in line with identifying Technical loss of the system. 2
- 3. Learning methods Power point presentation Open Discussion – Share experiences Exercises – Individuals/Groups Case Studies
- 4. INTRODUCTION - SYSTEM LOSSES
- 5. INTRODUCTION(2) - DISTRIBUTION LOSSES
- 6. Identify the session where Energy is lost the most in the system, all things being equal a)1 b)2 c)3 d)4 6 QUIZ (1) 1 2 3 4
- 7. What is PSAT? • Power system analysis tools (PSAT) are used for power system analysis • Create electrical model of power system equipments and define their connectivity • Simulate power system operation conditions and events • Steady state • Dynamic state • Faults • Breaker or equipment trips • Protective device sequence-of-operation • Support utilities in planning, operation, economic scheduling, and exchange of power between utilities, etc. • PSAT is used by engineers and technicians in • Planning Department • Operations Department 7
- 8. PSAT Features • Load Flow • Radial & Loops • Multi – phase • Distributed Generation (DG) Models • Time Series Simulation • Short Circuit • Radial & Loops • Balanced & Unbalanced • DG Models • Dynamic Stability • Dynamic model for rotating machines, loads and renewable resources • Other features • Harmonic, protective device coordination, optimization, etc. 8
- 9. Easy Power
- 10. OPEN SOURCE SOFTWARE (1) • A chronological list of free and open source software for power system analysis follows (the year in parenthesis indicates first release). • · UWPFLOW (1996). This is a research tool that has been designed to calculate local bifurcations related to system limits or singularities in the system Jacobian. The program also generates a series of output files that allow further analyses, such as tangent vectors, left and right eigenvectors at a singular bifurcation point, Jacobians, power flow solutions at different loading levels, voltage stability indices, etc. The program is written in C, and two versions for DOS (16-bit) and UNIX are available, including examples and a brief tutorial. The tool is maintained by Prof. C. A. Cañizares, University of Waterloo, Ontario, Canada. • · TEFTS (1996). This is a simple transient stability program to research Transient Energy Function (TEF) and voltage stability issues in dynamic models of AC-HVDC systems. The program is written in C, and two versions for DOS (16-bit) and UNIX are available, including examples and a brief tutorial. The application is hosted by University of Waterloo, Ontario, Canada. • · MATPOWER (1997). MATPOWER is a package of Matlab M-files for solving power flow and optimal power flow problems. It is intended as a simulation tool for researchers and educators that is easy to use and modify. MATPOWER is designed to give the best performance possible while keeping the code simple to understand and modify. It was initially developed as part of the PowerWeb project. Although MatPower is free and open source, it runs on Matlab, which requires a license. The application is developed by the E&CE group of the Cornell University, Ithaca, New York. • · PSAT (2002). The Power System Analysis Toolbox is a GNU/Octave-based toolbox for electric power system analysis. Main features of PSAT are: Power Flow; Continuation Power Flow; Optimal Power Flow; Small Signal Stability Analysis; Time Domain Simulation; Phasor Measurement Unit (PMU) Placement; User Defined Models; FACTS Models; Wind Turbine Models; Conversion of Data Files from several Formats; Export results to EPS, plain text, MS Excel and LaTeX files; and Interfaces to GAMS and UWPFLOW Programs. PSAT is maintained by Prof. F. Milano, University of Castilla-La Mancha, Ciudad Reaal, Spain. • · InterPSS (2006). The Internet Technology-based Open-source Power System Simulation System is an open- source development project aimed to develop an simple to use, yet powerful Internet technology based software system for design, analysis, and simulation of power systems. Its open and loosely coupled system architecture will allow components developed by others to be easily plugged into the system to augment its functionality, and equally important, allow its components to be integrated into other systems to provide certain power system simulation functionality or services. The project is currently under development by a team of developers living in the United States, Canada and China.
- 11. OPEN SOURCE SOFTWARE (2) • · AMES (2007). The AMES Market Package, developed entirely in Java by an interdisciplinary team of researchers at Iowa State University, is an extensible and modular agent-based framework for studying the dynamic efficiency and reliability of wholesale power markets restructured in accordance with guidelines issued by the U.S. Federal Energy Regulatory Commission. The AMES Market Package is a free open-source tool designed for the study of small to medium-sized systems. It also provides a graphical user interface and output reports through table and chart displays. • · DCOPFJ (2007). The DCOPFJ Package is a free open-source stand-alone solver for small to medium- sized DC optimal power flow problems having a strictly convex quadratic programming (SCQP) formulation. The DCOPFJ solver incorporates QuadProgJ, a dual active-set SCQP solver that has been shown to match or exceed the accuracy of the well-known proprietary QP solver BPMPD when tested on a public repository of small to medium-sized SCQP problems. The DCOPFJ solver has been successfully run on DC-OPF test cases commonly used for training purposes. DCOPFJ is a tool developed entirely in Java by a team of researchers at Iowa State University. • · OpenDSS (2009). The Electric Power Research Institute, Inc. (EPRI) has made its Distribution System Simulator (DSS) program available as an open source project on the SOURCEFORGE.NET® website. The OpenDSS software is a comprehensive electrical power system simulation tool for electric utility distribution systems. The program has been developed for the Microsoft Windows environment. It supports nearly all frequency domain (sinusoidal steady-state) analyses commonly performed on electric utility power distribution systems. In addition, it supports many new types of analyses that are designed to meet future needs related to grid modernization efforts. Additionally, this open source program may encourage the user community to contribute useful models that might help others active in grid modernization. • · MatDyn (2009). MatDyn is a free Matlab based open source program to perform dynamic analysis of electric power systems. It is inspired by Matpower, a power flow and optimal power flow program in Matlab and shares its philosophy: ``It is intended as a simulation tool for researchers and educators that is easy to use and modify.'' The source code of MatDyn is available. Care has been taken to keep it well structured and easy to understand. The project is currently developed and maitained by Stijn Cole, Katholieke Universiteit Leuven, Belgium.
- 12. Page 12 Project Highlights NEPLAN - General Power systems analysis software Planning Optimisation Simulation Generation HV transmission networks MV and LV distribution networks Industrial networks
- 13. Page 13 Project Highlights NEPLAN - Advantages Software frequently used in the sector Intuitive graphic and tabular programming Accessible via cloud Several uses (modules) Easy data exchange with Excel, Word, SQL…
- 14. Page 14 Project Highlights NEPLAN - Analysis Load flow Short circuit analysis Dynamic simulation Overcurrent protection Harmonic analysis Reliability analysis Small signal stability
- 15. Page 15 Project Highlights Quiz (2) Which of these Analysis models is/are relevant to power loss calculation?
- 16. Page 16 Project Highlights NEPLAN – Installation demo 1. Open Internet Explorer 2. Go to www.neplan.ch 3. Click on the Free Demo tab → Demo Link 4. Click on Register to create an account (+validate by email) 5. Login to the site, using Internet Explorer (only)
- 17. Page 17 Project Highlights Menu bar Toolbar Diagram Symbol windowMessage window NEPLAN - Interface
- 18. Page 18 Project Highlights NEPLAN – Basic elements Node NodeNode Load Logic switches Physical switches Network source
- 19. Page 19 Project Highlights NEPLAN – Node Name and nickname (Alias) Node type (main busbar, busbar, junction, special node) Rated voltage (Un) in kV and rated frequency (Fn) in Hz Minimum voltage (Umin) and maximum voltage (Umax) in % Grounding resistance in Ω (if applicable) Location → Zone and region (Area)
- 20. Page 20 Project Highlights NEPLAN - Elements Name and nickname (Alias) Nominal characteristics (Un, In, Fn…) Parameters (reactances, losses…) Passive elements (lines, transformers, switches, loads…) Active elements (Grid source, synchronous and asynchronous machine…)
- 21. Page 21 Project Highlights NEPLAN – Elements included in the lines Current transformers Voltage transformers Protections (circuit-breakers, differentials, relays…) • Directly included in the node declaration • No influence on load flow or short circuit analyses
- 22. Page 22 Project Highlights NEPLAN – Other Elements Switches : modify the network topology Physics : real elements of the network Logics : ficticious elements in the program Station : contains several nodes Simplifies the network diagram Zone and regions (area) : sub-networks Independent networks allowing transactions of defined powers between them (as between countries)
- 23. Page 23 Project Highlights Creating a project on Neplan 360 (web) or 10 (PC)
- 24. Page 24 Project Highlights Creating a project on Neplan 360 (web) or 10 (PC) Etc., quickly browse the rest of the tutorial...
- 26. Project Highlights Select the component category : 1 set of terminals 2 to 4 sets of terminals Depending on the selected category, the corresponding component list is displayed above
- 29. Project Highlights Enter 1 x 220 kV node and 2 x 65 kV nodes Change the voltage of the two 65 kV nodes to 33 kV
- 30. Project Highlights Enter an external network (i.e. source: slack node) Click on the component terminals and drag to the node, then release
- 31. Project Highlights Exercise Transformer Line Ur1= 220 kV Ur2= 33 kV URr(1)= 1% l= 20 km Ukr(1) = 10% type: ACSR ANT Sn= 7000 kVA Pfe= 0 kW Adding a load of 5000 kW To be connected later
- 32. Project Highlights Adding a load of 5000 kW To be connected later Transformer Line Ur1= 220 kV Ur2= 33 kV URr(1)= 1% l= 20 km Ukr(1) = 10% type: ACSR ANT Sn= 7000 kVA Pfe= 0 kW
- 33. Project Highlights Create a line library: By clicking on a line, to the right of « Type », click on « ... », », and select category ACSR And choose the type « ANT » Once imported, modifying the parameters in the library does not affect the components: the user must reload (re-select) the type of link to update the line parameters. And this for each line concerned.
- 34. Project Highlights Display the labels (node names...)
- 35. Project Highlights Perform the load flow calculation
- 38. Project Highlights CONCLUSIONS • Modelling distribution networks with NEPLAN has been presented: • it is now time to practice.
- 39. Page 39 Project Highlights Conclusions • Modelling distribution networks with NEPLAN has been presented: • it is now time to practice. o Introduction to NEPLAN, o conductor and transformer library, o load modeling, o single line diagram, • Next; calculation of load flow and power losses
- 40. Page 40 Project Highlights REFERENCES • Power Loss Reduction Technologies presentation; Power System Analysis Tool (PSAT), DNV KEMA Academy, 2013 • NAPTIN training presentation on Power loss Management, NAPTIN 2018 • Power Loss Calculation Training of Trainers (ToT) presentations, June 2019, Daniel D’Hoop, Gopa-Intec/GIZ @ VRA Academy, Akuse, Ghana. • A TURNAROUND STORY! ON THE AGGREGATE TECHNICAL AND COMMERCIAL (AT&C) LOSS REDUCTION FROM 53% TO 15% IN DELHI AREA ACHIEVED IN 8 YEARS BY NDPL (NORTH DELHI POWER LIMITED) By Ajai Nirula . • Reducing Technical and Non-Technical losses in the Power sector Background Paper for the World Bank Group Energy Sector Strategy, July 2009