Main electrical scheme’s reliability evaluation for ChuXiong ±800kV rectifier station based on advanced four state component model

The classical four-state component model haven´t accord to practical situation because the equipment repairing technique based on condition of component developed quickly, and this paper put forwarded an advanced four state component model. That model redefined abnormal state and maintainable state, combined repair state based on condition of component and schedule repair state to repair state and then confirmed the conversion relationship and the parameter to each state. This paper put forwarded combining components and dividing subzone method to simplify the main electrical scheme to be a simple directional network, applied advanced four state component model in that network to calculate the subzone´s reliability parameter. Applied the least path searching method to search the least path matrix for the network and predigested the method by matrix multiplication, enumerated each fault state of that network by analytical method, worked out the reliability index of that network by VC++. And the reliability index of network is the reliability index of main electrical scheme in ChuXiong plusmn800 kV rectifier station. At last this paper analyzed the result of main electrical scheme´s reliability and it proved the method´s validity which used in this paper.