CAJ | 학술논문

过电压的在线监测和实时分析对过电压的防护、治理及数值仿真研究具有重要意义。提出一种基于电磁式电压互感器（voltage transformer，VT）宽频线性黑盒模型的过电压在线监测新方法。该方法利用电站现有的VT和二次电缆获取和传输过电压信号。基于黑盒原理建立了监测系统整体二端口传输参数模型，推导了矢量匹配法结合时域递归卷积的数值反演计算公式。根据测量得到的二次侧过电压信号，仿真计算获得了VT高压侧的过电压波形。应用该方法，在实验室搭建了过电压在线监测系统，计算结果与测量数据的比较验证了该监测方法的可行性和计算方法的有效性。
과전압적재선감측화실시분석대과전압적방호、치리급수치방진연구구유중요의의。제출일충기우전자식전압호감기（voltage transformer，VT）관빈선성흑합모형적과전압재선감측신방법。해방법이용전참현유적VT화이차전람획취화전수과전압신호。기우흑합원리건립료감측계통정체이단구전수삼수모형，추도료시량필배법결합시역체귀권적적수치반연계산공식。근거측량득도적이차측과전압신호，방진계산획득료VT고압측적과전압파형。응용해방법，재실험실탑건료과전압재선감측계통，계산결과여측량수거적비교험증료해감측방법적가행성화계산방법적유효성。
The online monitoring and analysis of the over-voltage is of great significance for the protection, control and numerical simulation research of the over-voltage in power system. A new method for over-voltage on-line monitoring based on the wideband transmission characteristic of potential transformer was proposed. This method applied the voltage transformers （VT）, secondary cables of the substation to obtain and transfer the over-voltage signals. The two ports network transmission parameter model of the whole system was build based on the black-box technique, and the numerical inverse calculation formula was deduced by means of vector fitting combining recursive convolution. AdoVTion of this model could derive the over-voltage waveform of the high-voltage port of the VT from the voltage signal of the secondary device by means of numerical simulation. The online monitoring system was put up in the laboratory. The comparison between the calculated results and measured data verified the feasibility of this monitoring method and the validity of the numerical inverse calculation method.