变电站综合自动化系统的软件可靠性研究

Studies on software reliability for substation automation system

提出在变电站综合自动化系统的软件开发中运用软件可靠性工程的理论,以保证和提高软件系统的可靠性的观点。建立了基于改进的JM模型的变电站综合自动化系统软件可靠性模型,改进模型在原有的JM模型基础上定义了故障消除概率,从而克服了原模型对于排错过程估计过于乐观的不足。该模型可以根据软件测试中搜集的故障数据,预测出软件系统可靠性增长的趋势,从而得出软件可以达到的可靠性指标及达到该指标所需要的测试时间。算例说明了该模型的可行性与有效性。

The software fault is becoming one of the main reasons resulting in disasters in real-time system. To guarantee and improve the software reliability for substation automation system （ SAS）, it brings software reliability engineering to bear during the software development period. A software reliability model for substation automation system based on improved JM model is set up in this paper. Compared with the old JM model, it defines fault eliminating probability in the improved one, which makes the assumptions become more accordant with practice. It forecasts the reliability improving curye of the software system according to the fault data collected in the process of software test, and then concludes the reliable index that the software can achieve and the software test time to reach the reliable index. The computation results show the validity and efficiency of the method in the software development of substation automation system.