Tài liệu miễn phí Điện - Điện tử
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Lecture Power system operation and control - Lesson 1: Review of phasors, complex power, and three-phase
Lecture Power system operation and control - Lesson 1: Review of phasors, complex power, and three-phase provide students with knowledge about transmission system has resistance, inductance, capacitance and flow limitations; simple system has no redundancy so power system will not work if any component fails;...
4/7/2023 11:23:59 PM +00:00
Lecture Methods of Electric power systems analysis - Lesson 25: Inertia power flow, black start, electric grid visualization
Lecture Methods of Electric power systems analysis - Lesson 25: Inertia power flow, black start, electric grid visualization provide students with knowledge about in the regular power flow a single slack bus is used so total load + losses = total generation; the slack bus is characterized by having a fixed voltage magnitude and angle; inertia and governor power flows;...
4/7/2023 11:23:52 PM +00:00
Lecture Methods of Electric power systems analysis - Lesson 24: Geomagnetic disturbances
Lecture Methods of Electric power systems analysis - Lesson 24: Geomagnetic disturbances provide students with knowledge about growing concern to consider what the NERC calls calls high-impact, low-frequency events (HILFs); others call them black sky days; keeping the lights on involves designing and operating the electric grid with a goal of simultaneously increasing two related but ultimately different concepts: reliability and resiliency;...
4/7/2023 11:23:38 PM +00:00
Lecture Methods of Electric power systems analysis - Lesson 23: Electricity markets
Lecture Methods of Electric power systems analysis - Lesson 23: Electricity markets provide students with knowledge about electricity markets history; markets versus centralized planning; generation owners have to decide their offer prices; electricity markets common features; LMP energy market; provides incentive to offer at marginal cost since higher values cause offers to be rejected;...
4/7/2023 11:23:26 PM +00:00
Lecture Methods of Electric power systems analysis - Lesson 22: LP, OPF, electricity markets
Lecture Methods of Electric power systems analysis - Lesson 22: LP, OPF, electricity markets provide students with knowledge about the OPF is usually formulated as a minimization with equality and inequality constraints; LP OPF solution method; LP standard form; marginal costs of constraint enforcement in LP; the marginal costs will be used to determine the OPF locational marginal costs (LMPs);...
4/7/2023 11:23:17 PM +00:00
Lecture Methods of Electric power systems analysis - Lesson 21: Optimal power flow, linear programming (LP)
Lecture Methods of Electric power systems analysis - Lesson 21: Optimal power flow, linear programming (LP) provide students with knowledge about OPF problem formulation; two bus with unconstrained line; power flow in a simple network distributes inversely to impedance of path; LP OPF solution method; enforces real/reactive power balance at each bus;...
4/7/2023 11:23:08 PM +00:00
Lecture Methods of Electric power systems analysis - Lesson 20: Economic dispatch, optimal power flow
Lecture Methods of Electric power systems analysis - Lesson 20: Economic dispatch, optimal power flow provide students with knowledge about unit commitment is used to determine which generator units should be committed to meet the load; the electric load varies substantially so there is almost always more generator capacity available than load; units have availability constraints minimum up time, time to start, cost to start;...
4/7/2023 11:23:01 PM +00:00
Lecture Methods of Electric power systems analysis - Lesson 19: Voltage stability, economic dispatch, optimal power flow
Lecture Methods of Electric power systems analysis - Lesson 19: Voltage stability, economic dispatch, optimal power flow provide students with knowledge about PV curves can be traced by plotting the voltage as the real power is increased; QV curves as reactive power is increased; at least for the upper portion of the curve; two bus example PV and QV curves;...
4/7/2023 11:22:50 PM +00:00
Lecture Methods of Electric power systems analysis - Lesson 18: Synthetic electric grids, voltage stability
Lecture Methods of Electric power systems analysis - Lesson 18: Synthetic electric grids, voltage stability provide students with knowledge about models of electric grids that were not created to represent any actual electric grid; the below image shows the five bus synthetic grid I used as an undergraduate; geographically-based synthetic electric grid;...
4/7/2023 11:22:40 PM +00:00
Lecture Methods of Electric power systems analysis - Lesson 17: EMSs, SVD, Pseudo inverse, equivalents
Lecture Methods of Electric power systems analysis - Lesson 17: EMSs, SVD, Pseudo inverse, equivalents provide students with knowledge about energy management systems (EMSs); traditionally power system analysis has mostly been focused on the sparse matrices associated with the electric grid; there was not much signal analysis;...
4/7/2023 11:22:33 PM +00:00
Lecture Methods of Electric power systems analysis - Lesson 16: State estimation, EMS
Lecture Methods of Electric power systems analysis - Lesson 16: State estimation, EMS provide students with knowledge about electric grid measurements; phasor measurement units (PMUs); assumed se measurement accuracy; SE observability; pseudo measurements; SE bad data detection; QR factorization; orthonormal matrices;...
4/7/2023 11:22:26 PM +00:00
Lecture Methods of Electric power systems analysis - Lesson 15: Least squares, state estimation
Lecture Methods of Electric power systems analysis - Lesson 15: Least squares, state estimation provide students with knowledge about revisit the uncommitted transfer capability (UTC) calculation using PTDFs and LODFs; recall trying to determine maximum transfer between two areas (or buses in our example); for base case maximums are quickly determined with PTDFs;...
4/7/2023 11:22:19 PM +00:00
Lecture Methods of Electric power systems analysis - Lesson 14: Power flow sensitivities
Lecture Methods of Electric power systems analysis - Lesson 14: Power flow sensitivities provide students with knowledge about various additional distribution factors may be defined; these factors may be derived from the ISFs making judicious use of the superposition principle; that corresponds to a situation in which the contingency causes system islanding;...
4/7/2023 11:22:11 PM +00:00
Lecture Methods of Electric power systems analysis - Lesson 13: Power flow sensitivities
Lecture Methods of Electric power systems analysis - Lesson 13: Power flow sensitivities provide students with knowledge about the idea of power flow sensitivity analysis is to get an estimate of how some set of values would change with respect to a change in a set of control values; sensitivities are widely used in power system analysis, with some algorithms doing sequential linearizations;...
4/7/2023 11:22:00 PM +00:00
Lecture Methods of Electric power systems analysis - Lesson 12: August 14 2003 Blackout
Lecture Methods of Electric power systems analysis - Lesson 12: August 14 2003 Blackout provide students with knowledge about some electric grid risks; the real cause of most blackouts; high-impact, low-frequency events; avoidable transmission level blackouts; line outage distribution factors (LODFs); flowgates are used as proxies for other types of limits, such as voltage or stability limits;...
4/7/2023 11:21:49 PM +00:00
Lecture Methods of Electric power systems analysis - Lesson 11: Sensitivity
Lecture Methods of Electric power systems analysis - Lesson 11: Sensitivity provide students with knowledge about power flow topology processing; topology processing agorithm; bus branch versus node breaker; substation configurations; EMS and planning models; node-breaker consolidation; contingency analysis;...
4/7/2023 11:21:42 PM +00:00
Lecture Methods of Electric power systems analysis - Lesson 10: Advanced power flow, sensitivity
Lecture Methods of Electric power systems analysis - Lesson 10: Advanced power flow, sensitivity provide students with knowledge about circulating reactive power; LTC tap coordination; auto detection of circulating reactive or real power; coordinated reactive control; phase-shifting transformers; phase-shifter model; integrated phase-shifter control;...
4/7/2023 11:21:34 PM +00:00
Lecture Methods of Electric power systems analysis - Lesson 9: Sparse systems, advanced power flow
Lecture Methods of Electric power systems analysis - Lesson 9: Sparse systems, advanced power flow provide students with knowledge about Tinney scheme 2; coding Tinney 2; Tinney scheme 3; sparse forward substitution with a permutation vector; sparse vector methods; factorization paths; path table and path graph; computation with complex and blocked matrices;...
4/7/2023 11:21:27 PM +00:00
Lecture Methods of Electric power systems analysis - Lesson 8: Sparse systems
Lecture Methods of Electric power systems analysis - Lesson 8: Sparse systems provide students with knowledge about general sparse matrix storage; a general approach for storing a sparse matrix would be using three vectors, each dimensioned to number of elements; unordered approach doesn’t make for good computation since elements used next computationally aren’t necessarily nearby;...
4/7/2023 11:21:18 PM +00:00
Lecture Methods of Electric power systems analysis - Lesson 7: DC Power flow, Gaussian elimination, sparse systems
Lecture Methods of Electric power systems analysis - Lesson 7: DC Power flow, Gaussian elimination, sparse systems provide students with knowledge about DC power flow in powerworld; linear system solution; sparse matrices arise in many areas, and can have domain specific structures; Gaussian elimination can be readily applied to sparse matrices;...
4/7/2023 11:21:10 PM +00:00
Lecture Methods of Electric power systems analysis - Lesson 6: Power operations, power flow
Lecture Methods of Electric power systems analysis - Lesson 6: Power operations, power flow provide students with knowledge about three bus powerworld simulator case; basic power control; power flow in transmission line is limited by heating considerations; overloaded transmission line; automatic generation control;...
4/7/2023 11:21:03 PM +00:00
Lecture Methods of Electric power systems analysis - Lesson 5: Power flow
Lecture Methods of Electric power systems analysis - Lesson 5: Power flow provide students with knowledge about two bus Newton-Raphson example; two bus solved values; two bus case low voltage solution; practical power flow software note; two bus region of convergence; power flow fractal region of convergence; modeling voltage dependent load;...
4/7/2023 11:20:51 PM +00:00
Lecture Methods of Electric power systems analysis - Lesson 4: Power flow
Lecture Methods of Electric power systems analysis - Lesson 4: Power flow provide students with knowledge about using the Ybus; solving for bus currents; solving for bus voltage; complex power being consumed by the load, and the power being injected by the generators plus their voltage magnitudes; power balance equations; early power flow system size;...
4/7/2023 11:20:44 PM +00:00
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;
4/7/2023 11:20:37 PM +00:00
Lecture Methods of Electric power systems analysis - Lesson 2: Power systems overview
Lecture Methods of Electric power systems analysis - Lesson 2: Power systems overview provide students with knowledge about electric frequencies and residential voltages worldwide; historical electric utility organization; transmission and distribution; three phase transmission line; heating is a major concern that can quickly lead to loss of transformer life;...
4/7/2023 11:20:22 PM +00:00
Lecture Methods of Electric power systems analysis - Lesson 1: Power systems overview
Lecture Methods of Electric power systems analysis - Lesson 1: Power systems overview provide students with knowledge about electric utility: can range from quite small, such as an island, to one covering half the continent; microgrids can power smaller areas (like a campus) and can be optionally connected to the main grid; airplanes and Spaceships: reduction in weight is primary consideration; frequency is 400 Hz; ships and submarines;...
4/7/2023 11:20:11 PM +00:00
Lecture Digital Logic & Design: Lesson 45
Lecture Digital Logic & Design: Lesson 45 provide students with knowledge about successive approximation converter; widely used, faster conversion time w.r.t. dual slope; explain operation; circuit diagram (fig 1); A/D converter errors; Binary-Weighted-Input D/A converter;...
4/7/2023 11:03:33 PM +00:00
Lecture Digital Logic & Design: Lesson 44
Lecture Digital Logic & Design: Lesson 44 provide students with knowledge about block diagram of a logic element; LUT programmed to generate a function; LUT programmed as full-adder; continuous signal showing temperature varying with time; sampling the continuous signal at 15 equal intervals;...
4/7/2023 11:03:23 PM +00:00
Lecture Digital Logic & Design: Lesson 43
Lecture Digital Logic & Design: Lesson 43 provide students with knowledge about a five byte LIFO memory; memory based stack; address decoding of three 4KByte memory chips; memory map for the three 4K RAM chips; logic gate based address decoder; block diagram of a FPA;...
4/7/2023 11:03:16 PM +00:00
Lecture Digital Logic & Design: Lesson 42
Lecture Digital Logic & Design: Lesson 42 provide students with knowledge about a summary of memory types; devices A and B operating at same data rates; FIFO Memory connecting two communicating devices; writing and reading from FIFO buffer; FIFO implementation using four 8-bit shift registers;...
4/7/2023 11:03:10 PM +00:00