SERBIA: Power Network Analysis for Wind Power Integration

In this study analyses of integration of wind power plants and their influence in electric power system of Serbia have been performed. Time horizon is year 2015. Wind power plant projects included in this analysis are those projects which are at least initially permitted by EMS and following analyses have been performed:

• Review of wind power plant projects;
• Review of current control practice and Grid code of Serbia;
• Analysis of wind penetration in the electric power system of Serbia for current topology as well as for expected (real) topology in 2015:
• Load flow analysis
• Voltage profile analysis
• Contingency (n-1) analysis
• Detection of "bottlenecks"
• Analysis of frequency control and active power control;
• Identification of any limitations on wind power plant penetration.

The main result of the study is proposal of necessary network reinforcements (in order to make transmission system to be able to accept analyzed wind penetration) as well as proposal of criteria for connection of wind power plants to transmission network.

In addition, the goal is to make definition and assessment of additional costs associated with increasing levels of wind energy has been made. These additional costs should cover the costs of extra reserve, reduced load factors on the thermal and/or hydro plants, modifications to network components, network reinforcements…

Type of services provided:

• Estimation of maximal wind penetration in the EPS of Serbia
• Load flow analysis
• Voltage profile analysis
• Analysis of losses
• Contingency (n-1) analysis
• Detection of "bottlenecks"
• Network reinforcements
• Frequency regulation and active power control
• Proposal of criteria for connection of wind power plants