考虑状态量变化趋势的并联电抗器健康状态诊断方法

准确评估高压并联电抗器的运行健康状态可及时发现电抗器的潜在故障,减少电抗器发生事故的概率。以330kV油浸式并联电抗器为例,构建了基于证据理论的高压并联电抗器运行健康状态诊断模型。选取预防性试验和在线监测中具有代表性的状态量为评价指标,并将其分为油中溶解气体状态量、油化试验状态量、振动振幅和噪声等级、油中溶解气体状态量变化趋势四类。利用证据理论对四类状态量进行信息合成,进而诊断出并联电抗器运行健康状态。通过实例分析验证了该诊断模型的有效性和实用性。该方法可作为并联电抗器健康状态诊断的手段之一。

Health Condition Diagnosis Method of Shunt Reactor Considering Variation Trend of Condition Variables

Making a correct evaluation on the operational health condition of high-voltage (HV) shunt reactor can timely help to find the potential failures of the reactor and reduce the probability of the reactor accident. Taking 330 kV oil immersed shunt reactor as the research object, this paper established an HV shunt reactor operational health condition diagnosis model based on evidence theory. Some typical condition variables obtained in the preventative test and online monitoring were selected as the evaluating index. Those evaluation indexes were divided into four categories, of there categories are the condition variables of gas dissolved in oil, the condition variables of the oilation test, the vibration amplitude and noise level, and the online monitoring data reflecting the change trend respectively. Evidence theory was then used to synchronize the information of the four condition variables and a diagnosis was made on the operational health condition of the shunt reactor. A field case analysis was made to verify the effectiveness and practicability of this diagnosis model. The method can be used as a means of shunt reactors health condition diagnosis.