Kandahar Helmand Power Project (KHPP) Kajaki Substation Assessment

The substation is responsible for transmitting and distributing power from the KHPP to the surrounding areas. However, the substation has experienced sporadic generator bus faults, which have disrupted power supply and affected the reliability of the system. The generator bus faults are attributed to several factors, including the original design of the 13.8 kV bus and load connections. The internal plant bus configuration and external loads have contributed to the faults, which have resulted in trips of the 110 kV over-current relay, generator neutral ground, and 13.8 kV over-current relay. The unit over-speed and under-speed trips have also been observed. To mitigate the faults, several recommendations have been made. In the short term, the 13.8 kV distribution system needs to be upgraded to improve its reliability. This includes replacing the existing distribution lines and re-insulating the existing distribution lines. In the medium term, the governors of the generators need to be upgraded to improve their performance and reduce the likelihood of faults. Additionally, the 13.8 kV distribution system needs to be further upgraded to improve its reliability. The assessment also focused on locating potential sites for the new 110 kV KHPP transmission substation. The site selection process considered several factors, including engineering geology, site grading, and borrow material. The preferred site for the new substation is located near the existing KHPP substation, which will minimize the cost and complexity of the project. The assessment also evaluated the 20 kV distribution line route, which will connect the new substation to the existing distribution system. The preferred route was selected based on engineering geology and construction considerations. The route will pass through several villages and will require the construction of a river crossing. The assessment was conducted by Black and Veatch Special Projects Corp. (BVSPC), which has extensive experience in conducting technical assessments and providing solutions to complex power system problems. The assessment was focused on identifying the root causes of the generator bus faults and recommending solutions to mitigate them. The assessment also evaluated the potential sites for the new 110 kV substation and the 20 kV distribution line route. The KHPP substation is a critical component of the Kandahar Helmand Power Project, and its reliability is essential for providing power to the surrounding areas. The assessment has identified several areas for improvement, including the upgrade of the 13.8 kV distribution system, the governors of the generators, and the 13.8 kV distribution system. The assessment has also identified a preferred site for the new 110 kV substation and the 20 kV distribution line route. The implementation of the recommendations will require significant investment and resources. However, the benefits of improving the reliability of the KHPP substation and providing power to the surrounding areas will be substantial. The assessment has provided a comprehensive evaluation of the KHPP substation and has identified several areas for improvement. The implementation of the recommendations will require careful planning and execution to ensure that the project is completed on time and within budget.