CAJ | 학술논문

皖电东送淮南至上海特高压交流输电示范工程中采用双回线同杆并架工程方案。同杆并架双回线由于存在线间互感，导致线路保护中阶段式距离保护在阻抗测量方面存在问题，实际应用中可采用缩短保护范围的定值整定方法。但基于单回线测量阻抗原理的常规输电线路故障测距同样受互感的影响，特高压输电线路在故障时非常严重的暂态过程会给故障测距带来较大误差。建模仿真分析了线间互感及特高压输电线路的暂态过程对常规故障测距的影响，提出采用基于负序故障分量的分布参数双端测距原理的总体实现方案，从工程应用的角度出发测距方案采用单回线的信息，方案考虑特高压输电线路故障特征及满足故障测距原理的需要，提出基于“海明窗”级联式数字滤波器的故障测距算法，通过RTDS/Matlab建立皖电东送特高压输电线路仿真模型。仿真结果表明，所提出的测距方案不受同杆互感的影响、不受过渡电阻的影响，有效克服了特高压输电线路故障时暂态过程对测距算法的影响。
환전동송회남지상해특고압교류수전시범공정중채용쌍회선동간병가공정방안。동간병가쌍회선유우존재선간호감，도치선로보호중계단식거리보호재조항측량방면존재문제，실제응용중가채용축단보호범위적정치정정방법。단기우단회선측량조항원리적상규수전선로고장측거동양수호감적영향，특고압수전선로재고장시비상엄중적잠태과정회급고장측거대래교대오차。건모방진분석료선간호감급특고압수전선로적잠태과정대상규고장측거적영향，제출채용기우부서고장분량적분포삼수쌍단측거원리적총체실현방안，종공정응용적각도출발측거방안채용단회선적신식，방안고필특고압수전선로고장특정급만족고장측거원리적수요，제출기우“해명창”급련식수자려파기적고장측거산법，통과RTDS/Matlab건립환전동송특고압수전선로방진모형。방진결과표명，소제출적측거방안불수동간호감적영향、불수과도전조적영향，유효극복료특고압수전선로고장시잠태과정대측거산법적영향。
The parallel double circuit lines on the same tower engineering scheme is adopted by Anhui Electricity Eastward Transmitting Shanghai-Huainan UHV AC transmission demonstration project. The mutual inductance exists between lines of double circuits, which leads to the impedance measurement problem of stage type distance protection. In practical application it can be solved by shortening the protection range in fixed value setting method. Common transmission line fault location based on single loop measuring impedance principle is also influenced by mutual inductance, and fault location results will produce a bigger error caused by severe transient process when UHV transmission line fault occurs. This paper analyzes the influence of coupled inductance and transient process of UHV transmission lines on conventional fault location by modeling simulation, puts forward an overall implementation scheme of distribution parameter double-end fault location principle based on negative-sequence fault component. From engineering application perspective, single loop information is adopted in fault location scheme, and considering fault characteristics of UHV transmission line and the demand of fault location principle, a fault location algorithm based on Haiming window cascading digital filter is put forward. The simulation model of “Anhui Electricity Eastward Transmitting” UHV transmission line is established through RTDS/MATLAB, the simulation results show that the proposed scheme is not influenced by mutual inductance of the same tower and interim resistance, and effectively avoids the influence of the transient process of UHV transmission line fault on fault location.