电力系统保护与控制
電力繫統保護與控製
전력계통보호여공제
POWER SYSTM PROTECTION AND CONTROL
2014年
3期
9-14
,共6页
王夏霄%王野%王熙辰%王爱民%彭志强
王夏霄%王野%王熙辰%王愛民%彭誌彊
왕하소%왕야%왕희신%왕애민%팽지강
光纤电流互感器%动态特性%实验研究%闭环带宽%参数影响
光纖電流互感器%動態特性%實驗研究%閉環帶寬%參數影響
광섬전류호감기%동태특성%실험연구%폐배대관%삼수영향
fiber optical current transformer (FOCT)%dynamic character%experimental research%closed-loop width%parameter influence
全光纤电流互感器（FOCT）克服了电磁式电流互感器在暂态响应方面的弱点，满足现代电力系统对电流值实时精确测量的需求。为保证挂网使用时系统动态特性稳定符合使用要求，对光纤电流互感器的动态特性进行实验研究。根据光纤电流互感器原理建立动态模型并推导出传递函数，评估FOCT的动态特性；进一步分析该动态模型中几个重要参数与闭环带宽的关系，通过实验验证了系统闭环带宽与延迟光缆长度成反比，与前向通道增益成正比。并且与影响前向通道增益的主要参数：增益调节系数、干涉光强、和采样点数同样成正比。为了光纤电流互感器在设计和实际使用中保证一定的动态性能，在延迟光缆长度的选取、对影响系统前向通道增益各参数的选择等方面，提供了理论基础和参考依据。
全光纖電流互感器（FOCT）剋服瞭電磁式電流互感器在暫態響應方麵的弱點，滿足現代電力繫統對電流值實時精確測量的需求。為保證掛網使用時繫統動態特性穩定符閤使用要求，對光纖電流互感器的動態特性進行實驗研究。根據光纖電流互感器原理建立動態模型併推導齣傳遞函數，評估FOCT的動態特性；進一步分析該動態模型中幾箇重要參數與閉環帶寬的關繫，通過實驗驗證瞭繫統閉環帶寬與延遲光纜長度成反比，與前嚮通道增益成正比。併且與影響前嚮通道增益的主要參數：增益調節繫數、榦涉光彊、和採樣點數同樣成正比。為瞭光纖電流互感器在設計和實際使用中保證一定的動態性能，在延遲光纜長度的選取、對影響繫統前嚮通道增益各參數的選擇等方麵，提供瞭理論基礎和參攷依據。
전광섬전류호감기（FOCT）극복료전자식전류호감기재잠태향응방면적약점，만족현대전력계통대전류치실시정학측량적수구。위보증괘망사용시계통동태특성은정부합사용요구，대광섬전류호감기적동태특성진행실험연구。근거광섬전류호감기원리건립동태모형병추도출전체함수，평고FOCT적동태특성；진일보분석해동태모형중궤개중요삼수여폐배대관적관계，통과실험험증료계통폐배대관여연지광람장도성반비，여전향통도증익성정비。병차여영향전향통도증익적주요삼수：증익조절계수、간섭광강、화채양점수동양성정비。위료광섬전류호감기재설계화실제사용중보증일정적동태성능，재연지광람장도적선취、대영향계통전향통도증익각삼수적선택등방면，제공료이론기출화삼고의거。
Fiber optic current transducer (FOCT) overcomes the weakness of electromagnetic current transducer in transient current response and meets the demands of accurate current measurement of modern power system in real-time. Experimental research on FOCT’s dynamic character is done to ensure the system dynamic characteristics meet the practical requirements. A dynamic model is established based on the working principle of FOCT, and its transfer function is also deduced, so that the dynamic characteristics of FOCT can be evaluated. Furthermore, the relationship between several important parameters in the dynamic model and the closed-loop bandwidth is analyzed;the experiment result shows that system bandwidth is inversely proportional to the length of delay fiber optic cable and proportional to the gain of forward channel. And the bandwidth is proportional to important parameters of the gain of forward channel, such as gain adjustment coefficient, interference intensity, and sampling numbers. In order to guarantee the dynamic performance in the FOCT’s designing and using, theoretical basis and reference are provided in the choice of length of delay fiber optic cable and the parameters of the gain in forward channel.
