TAILIEUCHUNG - Lecture Methods of Electric power systems analysis - Lesson 3: Per unit, Ybus, power flow

Lecture Methods of Electric power systems analysis - Lesson 3: Per unit, Ybus, power flow provide students with knowledge about wind now surpasses nuclear and hydro; slowing electric load growth; interconnected power system basic characteristics; three-phase per unit; | ECEN 615 Methods of Electric Power Systems Analysis Lecture 3 Per Unit Ybus Power Flow Prof. Tom Overbye Dept. of Electrical and Computer Engineering Texas A amp M University overbye@ Announcements Start reading Chapters 1 to 3 from the book mostly background material Homework 1 is assigned today. It is due on Thursday September 3 Public website is ecen-615-fall-2020 1 Wind now surpasses nuclear and hydro Source electricity monthly update April 2020 2 Slowing Electric Load Growth Much of the slowing load growth is due to distributed generation such as solar PV which sits on the customer side of the meter Source EIA Monthly Energy Review July 2019 3 Except in Texas The left graph is peak demand the right energy ERCOT set a new peak electric load of GW on 8 12 19 surpassing the GW record from 2018 total energy in 2017 was 357 billion kWh Source gridinfo load forecast 4 Interconnected Power System Basic Characteristics Three phase AC systems generation and transmission equipment is usually three phase industrial loads are three phase residential and commercial loads are single phase and distributed equally among the phases consequently a balanced three phase system results Synchronous machines generate electricity Exceptions some wind is induction generators solar PV Interconnection transmits power over a wider region with subsystems operating at different voltage levels 5 Load Models Omitted from Lecture 2 Ultimate goal is to supply loads with electricity at constant frequency and voltage Electrical characteristics of individual loads matter but usually they can only be estimated actual loads are constantly changing consisting of a large number of individual devices only limited network observability of load characteristics Aggregate models are typically used for analysis Two common models The ZIP model combines constant constant power Si Pi jQi impedance current constant impedance Si V 2 Zi and power

• Điện - Điện tử
• Lecture Methods of Electric Power Systems
• Bài giảng Phương pháp phân tích hệ thống điện
• Methods of electric power systems
• Power flow analysis
• Power system analysis tools
• Steady state analysis tool
• Power systems overview
• Consumes electric energy
• Electric grid time frames
• Inertia power flow
• Black start
• Electric grid visualization
• Synthetic electric grids
• Voltage stability
• High quality synthetic electric grids
• Geomagnetic disturbances
• Electric grid risks
• Electric power dashboard
• Sparse systems
• Advanced power flow
• Sparse vector methods
• Power operations
• Power flow
• Automatic generation control
• Residential distribution transformers
• Synchronous machines generate electricity
• DC power flow
• Gaussian elimination
• Power balance equations
• Newton Raphson algorithm
• Newton Raphson power flow
• Modeling voltage dependent load
• Circulating reactive power
• Coordinated reactive control
• Power flow sensitivities
• Power llow sensitivity analysis
• Post contingency system
• Power transfer distribution factor
• Line outage distribution factor
• Economic dispatch
• Optimal power flow
• Mixed integer programming
• Linear programming (LP)
• OPF problem formulation
• State estimation
• Electric grid measurements
• Potential transformers (PTs)
• Compressed sparse row
• Graph theoretic interpretation
• Power flow topology processing
• Topology processing agorithm
• Substation configurations
• Electricity markets
• Horizontal market power
• Simultaneous auctions
• Pseudo inverse
• Energy management systems
• Matrix singular value decomposition
• Dynamic pricing
• Low frequency events
• Avoidable transmission level
• Least squares
• Nonlinear formulation
• Nutrition problem marginal costs
• Nonlinear cost functions