CAJ | 학술논문

要实现基于电流差动原理的智能变电站站域后备保护，需要获取相邻变电站的SV和GOOSE信息，为此研究了变电站之间的信息传输方案。满足带宽和实时性要求的SV传输方案有以下三种：借用光纤纵差保护装置转发的方案、采用专用数据转发装置的方案和广域以太网扩展变电站过程层网络的方案。经过性能对比分析，第三个方案互操作性好、数据带宽高，最适合于站域后备保护的实际应用。对第三个方案从SV数据的同步性、数据通道带宽、通信传输距离及可靠性、数据传输延时等几个方面进行了初步分析，表明采用该方案在智能变电站之间透明传输SV和GOOSE信息是可行的。最后指出了实用化过程中需要进一步研究的内容和可能存在的问题。
요실현기우전류차동원리적지능변전참참역후비보호，수요획취상린변전참적SV화GOOSE신식，위차연구료변전참지간적신식전수방안。만족대관화실시성요구적SV전수방안유이하삼충：차용광섬종차보호장치전발적방안、채용전용수거전발장치적방안화엄역이태망확전변전참과정층망락적방안。경과성능대비분석，제삼개방안호조작성호、수거대관고，최괄합우참역후비보호적실제응용。대제삼개방안종SV수거적동보성、수거통도대관、통신전수거리급가고성、수거전수연시등궤개방면진행료초보분석，표명채용해방안재지능변전참지간투명전수SV화GOOSE신식시가행적。최후지출료실용화과정중수요진일보연구적내용화가능존재적문제。
To realize the substation-area backup protective relay which adopts current differential principle in smart substation, it is necessary to obtain the sampled values (SV) and generic object oriented substation event (GOOSE) from adjacent substations. Therefore the communication schemes between smart substations are researched. There are three schemes suitable for SV transmission with high bandwidth and real-time characteristic, as follows: the solution by means of optical differential protection device, the solution by dedicated data forwarding device and the solution of extending process layer network by wide-area Ethernet. After a comparative analysis, the third solution with good interoperability and high bandwidth is the most suitable scheme for practical application of substation-area backup protection. The paper makes a preliminary theoretical analysis from several aspects, such as SV synchronization method, data channel bandwidth, communication distance, communication reliability and transmission delay. So it draws a conclusion that transmitting SV transparently between smart substations by the third solution is feasible. In the end, a few possible issues need further study is dedicated.