Improve the reliability and environment of power system based on optimal allocation of WPG

In last paper, the installation of small type decentralized energy resources dealt with the optimal method of installation based on inherent data of dispersed recourses of small size generators. In this paper, wind electric generation is used as an accessory power service recourses to improve the reliability index in energy supply for existing power system based on the initial reliability index and optimal allocation of wind power turbine in existing power system, the operation data determining output of wind power turbine is derived from the operation characteristics in our target region. The total optimal capacity of the wind electric generation to be installed for each target bus is determined based on the characteristics of wind condition so as to manage the supply reliability of the existing system to reach the permissible level. The reliability constraint has been used to ensure that each period; the introduced wind electric generation together with exiting units provides a level of system reliability index that is not lower that a user specified energy supply index. Probabilistic security index obtained from the generator outage probability and the operation characteristics of wind power turbine then decides the selection of the target sites for installation. The environment efficiency is considered by determined capacity of wind electric energy. The validity and effectiveness of the proposed approach is verified through numerical examples on the IEEE 30-buses, 6-generators and 41-lines power system.