电网一次设备状态检修风险评估方法改进

电网一次设备风险评估结论是状态检修辅助决策中的一个重要依据。传统风险评估方法对电气元件在电网中的位置重要性(系统枢纽变电站、地区重要变电站和一般变电站)进行粗略分类定级,没有基于电网潮流的定量计算分析,也未考虑元件检修对电网造成的损失影响,对电力系统元件检修决策难以定量指导。在弥补传统风险评估方法不足的基础上,提出了基于电网安全分析的电网一次设备风险定量评估方法,该方法主要对元件故障后电网稳定情况、减供负荷值等指标进行分析,根据各指标值对电网不同运行方式下一次设备故障的风险损失进行计算,风险损失以货币形式给出。该方法根据设备运行与检修存在风险的比值结果,指导设备状态检修工作。通过实例计算,结果表明改进算法能够更准确地反映设备在电网中的运行状态,弥补了传统评估方法的不足。

Risk Assessment Methods Improvement of Status Maintenance in Grid Primary Equipments

The risk assessment conclusion of grid primary equipments was the important basis in assistant decision-making system of status maintenance. The traditional risk assessment methods only did grading roughly to the position importance of electrical components in the grid, did not conduct quantitative analysis based on grid power flow, and did not consider the influence of maintenance lost to the grid, it was difficult to direct the decision in element maintenance. On the basis of making up the traditional method deficiency, proposed a quantitative risk assessment method of the primary equipments based on the safety analysis, which could conduct the quantitative analysis of the grid stability and load shedding amount while the element failures, according to risk lost of each index value during the different running conditions, gave the risk lost as the type of currency. This method could direct the status maintenance according to the ratio of repair and non-repair. Through the example calculation, the result showed that the improved calculation method could reflect the real running status of equipments more accurately, and made up the shortcomings of the traditional methods.