General Time-Dependent Equations for Short-Range Optimization of Hydrothermal Electric Systems

A B "We tieat the problemof optimal economicopration of hydrothermalelectric pow( r systems with variable head hydro plants employing the power flow equations to represent the network. Newton's method is used to solve the problem for a number of test systems. A comparison with solutions withe fixed head is presented. In general the optimal schedule requires higher slack bus and thermal power generation and cost in the case ofvariable head hydro plant than that required by the fixed head hydro plant in all demand periods. Corrxpondingly, the hydro generation is less in the case of variable head hydro plant compared to fvred head hydro plant. A negligible difference in voltage magnitudes in all the time intervals, but it is observed that slightly higher voltages occur in the case of the fixed head hydro plant. Higher power and energy losses occur in the case of variable head hydro plants compared to the fixed head hydro plants. Lower CPU time is required by the polar formulation than the rectangular formulation for all systems except for the case of the 14 bus system. For the 118 bus system, the rectangular formulation requires more than twice the CPU time required by the polar formulation.

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A short term hydrothermal scheduling approach for dominantly hydro systems

Ohishi

Soares

Carvalho

1991

IEEE Trans. Power Syst.

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General Time-Dependent Equations for Short-Range Optimization of Hydrothermal Electric Systems

Cited by 7 publications

References 6 publications

An Overview of Economic Dispatch for General Hydro-Thermal Electric Power Systems

An Overview of Economic Dispatch for General Hydro-Thermal Electric Power Systems

Hydro-thermal power flow scheduling accounting for head variations

A short term hydrothermal scheduling approach for dominantly hydro systems

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