EE8702 – NOTES & QP
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EE8702 – SYLLABUS
UNIT I PRELIMINARIES ON POWER SYSTEM OPERATION AND CONTROL
Power scenario in Indian grid – National and Regional load dispatching centers – requirements of good power system – necessity of voltage and frequency regulation – real power vs frequency and reactive power vs voltage control loops – system load variation, load curves and basic concepts of load dispatching – load forecasting – Basics of speed governing mechanisms and modeling – speed load characteristics – regulation of two generators in parallel.
UNIT II REAL POWER – FREQUENCY CONTROL
Load Frequency Control (LFC) of single area system-static and dynamic analysis of uncontrolled and controlled cases – LFC of two area system – tie line modeling – block diagram representation of two area system – static and dynamic analysis – tie line with frequency bias control – state variability model – integration of economic dispatch control with LFC.
UNIT III REACTIVE POWER – VOLTAGE CONTROL
Generation and absorption of reactive power – basics of reactive power control – Automatic Voltage Regulator (AVR) – brushless AC excitation system – block diagram representation of AVR loop – static and dynamic analysis – stability compensation – voltage drop in transmission line – methods of reactive power injection – tap changing transformer, SVC (TCR + TSC) and STATCOM for voltage control.
UNIT IV ECONOMIC OPERATION OF POWER SYSTEM
Statement of economic dispatch problem – input and output characteristics of thermal plant – incremental cost curve – optimal operation of thermal units without and with transmission losses (no derivation of transmission loss coefficients) – base point and participation factors method – statement of unit commitment (UC) problem – constraints on UC problem – solution of UC problem using priority list – special aspects of short term and long term hydrothermal problems.
UNIT V COMPUTER CONTROL OF POWER SYSTEMS
Need of computer control of power systems-concept of energy control centers and functions – PMU – system monitoring, data acquisition and controls – System hardware configurations – SCADA and EMS functions – state estimation problem – measurements and errors – weighted least square estimation – various operating states – state transition diagram.