An Approach to Locate Site of Renewable Energy Source (RES) and Application of Big Bang Optimization to Size the RES

C.V.Gopala krishna Rao, Dr.G.Ravindranath, C.V.S.Anirudh

In recent days the Renewable energy sources (RES) are being integrated into power transmission network which has many advantages which include reduction in cost of electrical generation, reduction in line losses and operating load bus at specified voltage. But inappropriate siting of RES causes severe penalty to advantages gained. The non-availability of electric power from conventional sources leads to excess slack power generation. This leads to violation of slack bus limits resulting in increased losses and poor bus voltages. Newton Raphson Load Flow(NRLF) is used to obtain voltage magnitude of transmission system. From this voltage profile by NRLF the siting of RES is decided. After deciding the site for RES the next issue is to size the RES so that system will not violate slack power limit. To satisfy slack power limit an optimization function with loss minimization, real power and reactive power balance as constraints is defined. This optimization function is solved using Big Bang-Big Crunch optimization. The RES variables obtained by minimization of objective function are also verified using RES indices namely total voltage deviation and real loss reduction index. These indices advocate real loss reduction index to be less than unity and total voltage deviation to be greater than unity. The approach proposed in this work confirm proper site and size of RES. This is confirmed upon application of proposed approach to WSCC-9 bus system.