By Lennart Söder, March 1994 (in English),
206 pages.
Summary
This report is the final report within the project Integration
study of
small amounts of wind power in the power system.
The project includes a
detailed simulation of the operation of a part of the
Swedish hydro power system. The aim of the simulations
is to study whether an increased amount of wind power
might decrease the efficiency of the hydro power system.
The simulation model uses simulated realistic forecasts of the load and total wind power production, and these forecasts are updated each hour. The result from the simulation model includes the efficiency of the hydro power system measured as how many % of the potential energy in the hydro system that is used for electricity production.
The first project report, Modelling of wind power forecast
uncertainty
which is appended to this report, treated methods of
how to simulate realistic forecasts of total produced
wind power.
The second project report, Load forecast uncertainty
impact on hydro
power system efficiency, treated the method of
how to simulate the operation of a hydro power system.
The simulation method included the presence of uncertain forecasts
and the calculation of the efficiency of the hydro system. This project
report is also appended to this report. Based on this project
report, two papers have been written and submitted
to IEEE Summer Meeting 1994. These two papers
are also appended.
The result from the simulations in the project is that Swedish wind power installations of about 2-2.5 TWh/year do not affect the efficiency of the Swedish hydro system. At wind power levels of about 4-5 TWh/year the installed amount of wind power has to be increased with about 1 % to compensate for the decreased efficiency in the hydro system. At wind power levels of about 6.5-7.5 TWh/year the needed compensation is probably about 1.2 %, but this figure has to be verified with more extended simulations.
The here presented report does not include effects on
the losses and limitations in the transmission or
distribution system. These effects can increase of decrease the value of
wind power in the power system.
For full report, please contact Lennart Söder :
lennart@ekc.kth.se