注零预处理与基于递归卷积法的发电系统可靠性评估

Pretreatment of zero-injecting and reliability assessment for power system based on recursive convolution

发电系统可靠性评估的本质是量化单一节点的供电充裕性,相当于对发电容量和负荷这两个随机变量做卷积运算。然而,对停运表进行卷积的时候需要判断运算单元是否超序,使复杂运算逻辑加上判断逻辑后变得更复杂。提出了一种规避超序判断的停运表改进办法——注零预处理,并用实际算例证明了注零预处理后的卷积更为高效。提出的停运表预处理技巧为简化程序逻辑和减少运算量提供了思路,对发电系统的可靠性评估有一定指导作用。

The nature of reliability assessment for power system is to quantize the electrical adequacy of a single node. It is equivalent to do convolution operation between the two random variables: the power generation capacity and the load. However,the operation units need to be determined whether they are offsequence when doing the convolution between the outage tables,and that makes the complex arithmetic logic even more complex after adding the determinant logic. This paper proposed a method that can avoid the discrimination of off-sequence to improve the outage table: pretreatment of zero-injecting. It also proved the recursive convolution would be more efficient after the pretreatment of zero-injecting by using the actual example. This pretreatment method for the outage table provided an idea to simplify the program logic and reduce the computation,which has certain guiding effects on the reliability assessment for power system.