Wind Power and Voltage Control
The voltage level in a power system must be either constant or within a very narrow range as equipment of power system utilities and households are designed to operate at a specific voltage level (Sourkounis & Tourou 2013).
In transmission lines, a mismatch in reactive power demand and supply will alter a voltage level (Basit et al. 2012).
Wind farms can support the voltage level by injecting or absorbing reactive power (by generator and shunt).
Qin et al. (2018) proposed a decision-making algorithm for the Danish automatic voltage control system, which is to minimize the grid losses while maintaining voltage magnitude at an acceptable level. The result shows the reduction of power losses by the participation of wind farms in the automatic voltage control system (Qin et al. 2018).
References
Basit, A., Hansen, A. D., Margaris, I. & Hansen, J.C., 2012. A Review of Grid Requirements for Wind Farm in Denmark and China. In China wind power 2012.
Qin, N., Bak, C.L. & Abildgaard, H., 2018. Automatic voltage control system with market price employing large wind farms. Electric Power Systems Research, 157, pp.93–105.
Sourkounis, C. & Tourou, P., 2013. Grid Code Requirements for Wind Power Integration in Europe. Conference Papers in Energy, 2013, pp.1–9.