Analysis and design of connection between solar farm and IEEE 9 bus system

Abstract

This paper designs a connection of a new large-scale solar farm (160 MW) to an existing 230 kV system (based on the IEEE 9 bus system). Regarding the choice of connecting the solar farm to Bus, this paper respectively gives the analysis of Bus5, Bus6 and Bus8, and draws the conclusion that connecting Bus5 is the best choice. When designing the transmission line, this paper gives the shortcomings of tower type B and tower type C, analyzes the reasons for choosing tower type A, and analyzes the various parameters of 5 different conductors. The best conductor choice is 16.33 mm wire, the best conductor bundling option is bundling spacer – 2 conductors. Then, this paper used PowerWorld to simulate the circuit diagram of the IEEE 9 bus system, and carried out power flow analysis and system safety analysis on the power system. It is recommended to connect the transmission line in parallel between Bus5 and Bus7 and between Bus4 and Bus5 to enhance the safety and stability of the system. When any one of the transmission lines is disconnected, the remaining transmission lines will not overcurrent and can work safely. Finally, this paper analyzes the total cost of the design from three aspects: new transmission lines, parallel conductors of old transmission lines, parallel capacitor and inductor, and calculates the total cost is $1,405,398,400.