特高压变压器调压补偿方式分析与档位选择Analysis and Gear Selection of UHV Transformer Regulation Compensation Methods
谭风雷,陈昊,刘怀宇
TAN Fenglei,CHEN Hao,LIU Huaiyu
摘要(Abstract):
受绝缘水平和制造成本的制约,特高压变压器采用中性点调压方式,但这种调压方式会引起低压侧电压波动。为抑制电压波动,一般采用完全补偿和非完全补偿2种调压补偿方式。在充分研究特高压变压器结构原理的基础上,给出了2种补偿方式各绕组间的电气连接与电磁耦合关系,并以完全补偿方式为例,对特高压变压器的调压过程进行了定性分析。建立了2种补偿方式的数学模型,在高压侧电压保持额定值和高压侧电压波动2种情况下,对2种补偿方式进行了定量分析,结果表明采用完全补偿方式时,低压侧电压波动较小,中压侧调压效果较好。最后研究了特高压变压器的档位选择方法,给出了高压侧电压与档位的对应关系,可为现场档位选择提供指导。
Being restricted by insulation level and manufacturing cost, UHV transformers adopt a neutral point voltage regulation method, which causes voltage fluctuations on the low voltage side. Complete compensation and incomplete compensation are generally used to suppress voltage fluctuations. The relationship between electrical connection and electromagnetic coupling of the windings of the two compensation modes is given in detail based on the study of the structural principle of UHV transformer, and the qualitative analysis of the voltage regulation process of UHV transformers is carried out by taking the full compensation method as an example. Mathematical models of the two compensation methods are established, and quantitative analysis of the two compensation methods is carried out in respect of rated voltage value and fluctuation on the high-voltage side. The results show that when the full compensation method is adopted, the voltage fluctuation on the low-voltage side is small and the voltage regulation effect on the medium-voltage side is better. Finally, the gear selection method of the UHV transformer is studied and the corresponding relationship between the voltage on the high voltage side and gear is given, which guides field gear selection.
关键词(KeyWords):
特高压变压器;完全补偿;非完全补偿;补偿方式;档位选择;电磁耦合
UHV transformer;complete compensation;incomplete compensation;compensation method;gear selection;electromagnetic coupling
基金项目(Foundation): 国网江苏省电力有限公司创新工作室项目(2020016L05)
作者(Author):
谭风雷,陈昊,刘怀宇
TAN Fenglei,CHEN Hao,LIU Huaiyu
DOI: 10.19585/j.zjdl.202110014
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