In this paper, the impact of cogeneration systems, representing distributed generations (DGs) scattered around in the distributed network, on enhancing the voltage profile and system losses is investigated. Different network loading levels are identified and categorized into peak, medium and light loading. A sensitivity-based method is used to reduce the search space and detect promising substation locations that can have a noticeable effect on system voltage and efficiency. Al Ain distribution system (AADS) is considered as the test system in this paper. Various locations that have a cogeneration potential were selected and various activities were allocated. Results show that, cogeneration, placed as DGs in the AADS at 13 locations, out of 178 nodes in the system, can bring tremendous benefits to system voltage profile and energy losses. Furthermore, economic viability is warranted under existing system operating conditions.