摘要
绕组结构产生的移相网络作用对现场介质损耗试验测试结果存在很复杂的影响,为此,以变压器套管介损测试为例,对现场试验的各种情况进行了分析,发现移相作用取决于被试变压器结构参数。不同结构的变压器,移相网络输入、输出电压相位差既可为正,也可为负,甚至基本为零,导致介质损耗测试结果可能偏大、偏小,也可能无偏差,偏差幅值与试验电压频率有确定的关系,现场试验也证实了分析结果。
Phase shifting network derived from winding type structures has complex effects on the measurement results during on-site dissipation factor tests. With the dissipation factor test of transformer bushing for instance, it has been found that the phase shifting range lies on the transformer structural parameters by the analysis of various measurement status. The phase shifting magnitude could be positive, negative or nil which would result in positive, negative error or no error. It has also been found that the dissipation measurement error has clear relation to the test voltage frequency, which has been verified by field tests.
出处
《广东电力》
2006年第7期8-10,共3页
Guangdong Electric Power
关键词
绕组结构
介质损耗
移相网络
winding type structure
dielectric loss
phase shifting network
