电力系统保护与控制
電力繫統保護與控製
전력계통보호여공제
POWER SYSTM PROTECTION AND CONTROL
2013年
9期
142-147
,共6页
李宝伟%倪传坤%唐艳梅%席颖颖%邓茂军%周东杰
李寶偉%倪傳坤%唐豔梅%席穎穎%鄧茂軍%週東傑
리보위%예전곤%당염매%석영영%산무군%주동걸
智能变电站%电子式互感器%采样同步%差动保护%重采样
智能變電站%電子式互感器%採樣同步%差動保護%重採樣
지능변전참%전자식호감기%채양동보%차동보호%중채양
smart substation%electronic instrument transformer%sampling synchronization%differential protection%resample
阐述智能变电站中组网传输采样值系统结构,分析了基于组网方式传输采样值的电子式互感器采样时序及站内采样同步的关键技术,在此基础上提出一种基于组网传输采样值的纵联光纤差动保护同步方案.该方案将纵联光纤差动采样同步下放至合并单元中完成,根据计算出的两侧采样时刻偏差和本侧重采样时刻对对侧采样数据进行重采样,最终在合并单元中完成两侧采样数据的同步,并将同步之后的对侧数据以IEC61850-9-2方式发送至过程层网络.通过理论分析和仿真验证可知,该采样同步方案不依赖同步时钟源、同步精度高、运算量小、易于实现、并具备工程应用灵活及兼容性强的优点,有着广泛推广的现实意义.
闡述智能變電站中組網傳輸採樣值繫統結構,分析瞭基于組網方式傳輸採樣值的電子式互感器採樣時序及站內採樣同步的關鍵技術,在此基礎上提齣一種基于組網傳輸採樣值的縱聯光纖差動保護同步方案.該方案將縱聯光纖差動採樣同步下放至閤併單元中完成,根據計算齣的兩側採樣時刻偏差和本側重採樣時刻對對側採樣數據進行重採樣,最終在閤併單元中完成兩側採樣數據的同步,併將同步之後的對側數據以IEC61850-9-2方式髮送至過程層網絡.通過理論分析和倣真驗證可知,該採樣同步方案不依賴同步時鐘源、同步精度高、運算量小、易于實現、併具備工程應用靈活及兼容性彊的優點,有著廣汎推廣的現實意義.
천술지능변전참중조망전수채양치계통결구,분석료기우조망방식전수채양치적전자식호감기채양시서급참내채양동보적관건기술,재차기출상제출일충기우조망전수채양치적종련광섬차동보호동보방안.해방안장종련광섬차동채양동보하방지합병단원중완성,근거계산출적량측채양시각편차화본측중채양시각대대측채양수거진행중채양,최종재합병단원중완성량측채양수거적동보,병장동보지후적대측수거이IEC61850-9-2방식발송지과정층망락.통과이론분석화방진험증가지,해채양동보방안불의뢰동보시종원、동보정도고、운산량소、역우실현、병구비공정응용령활급겸용성강적우점,유착엄범추엄적현실의의.
@@@@This paper expounds the system structure of the sampled value transmit by network in smart substation, analyses time sequence of electronic instrument transformer sampled value transmit by network and key technologies of sample synchronization, based on this, puts forward a kind of longitudinal optical differential synchronization scheme based on the sampled value transmit by network. Using this scheme the optical differential sample synchronization is completed in merge unit, the opposite data based on calculated sampling time deviation of two sides and the time resample stamp of this side are resampled, finally sample synchronization is finished in the merge unit, and then the synchronous sampled value is sent to the network by IEC61850-9-2. Theoretical analysis and simulation results prove that the sample synchronization scheme does not rely on the source synchronous clock, and has advantages of high precision, small burden, being easy to carry out, and the flexible engineering application and strong compatibility, so it has widely practical significance.