专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

52. 发明公开

KR1020020076574A 리액턴스 효과를 제거하는 송전선로 보호용 거리계전기법 有权
标题翻译：传输线保护距离继电器，用于最小化反应
公开(公告)号：KR1020020076574A
公开(公告)日：2002-10-11
申请号：KR1020010016545
申请日：2001-03-29
申请人： 유호전기공업주식회사 , 안용진 , 이승재 , 강상희
发明人： 안용진 , 강상희 , 이승재
IPC分类号： H02H7/26
CPC分类号： H02H3/40 , H02H7/26
摘要： PURPOSE: A distance relay is provided to minimize a reactance which causes erroneous operation of the distance relay, by compensating size and phase of the impedance estimated by the distance relay upon occurrence of accident accompanied with a failure resistance in a transmission line. CONSTITUTION: A distance relay operates by a step(S100) of receiving voltage and current signals; a step(S110) of filtering the received signal; a step(S120) of calculating a power frequency component from the filtered signal; a step(S130) of judging whether an over current flows by comparing the power frequency component calculated in the previous step with a threshold value; a step(S140) of judging whether it is a ground fault of disconnection fault, if the over current flows; a step(S150) of calculating an estimated impedance if it is judged as a ground fault; a step(S160) of calculating an estimated fault point; a step(S170) of calculating a zero-phase-sequence component current distribution coefficient; a step(S180) of calculating a phase angle; a step(S190) of calculating a corrected impedance by correcting the estimated impedance through the use of the value of the phase angle; a step(S200) of performing the step(S160) if the difference between the current corrected impedance and the previous corrected impedance is larger than a preset value, and performing the subsequent step if the difference is smaller; a step(S210) of calculating an estimated impedance if it judged as a disconnection fault; steps(S220 to S240) of calculating an estimated fault point, a zero-phase-sequence component current distribution coefficient and a phase angle; a step(S250) of calculating a corrected impedance; a step(S260) of performing the step(S220) if the difference between the current corrected impedance and the previous corrected impedance is larger than a preset value, and performing the subsequent step if the difference is smaller; a step(S270) of judging whether the corrected impedance falls within a protection range; and a step(S280) of performing a filtering step if the corrected impedance does not fall within the protection range, and generating a trip signal if the corrected impedance falls.
摘要翻译：目的：提供距离继电器，以通过补偿距离继电器估计的阻抗在传输线路中发生故障电阻时发生的事故的尺寸和相位来减小导致距离继电器误动作的电抗。构成：距离继电器通过接收电压和电流信号的步骤（S100）操作; 步骤（S110）对所接收的信号进行滤波; 从滤波信号计算功率频率分量的步骤（S120）; 通过将在前一步骤中计算的功率频率分量与阈值进行比较来判断过电流是否流动的步骤（S130）判断过电流是否为断路故障的接地故障的步骤（S140）; 如果判断为接地故障则计算估计阻抗的步骤（S150）; 计算估计故障点的步骤（S160）; 计算零相序分量电流分布系数的步骤（S170）; 计算相位角的步骤（S180）通过使用相位角的值来校正所估计的阻抗来计算校正后的阻抗的步骤（S190）; 如果当前校正的阻抗和前一校正阻抗之间的差异大于预设值，则执行步骤（S160）的步骤（S200），并且如果差值较小则执行后续步骤; 如果判断为断开故障则计算估计阻抗的步骤（S210）; 计算估计故障点的步骤（S220至S240），零相序分量电流分布系数和相位角; 计算修正后的阻抗的步骤（S250）如果当前校正后的阻抗和前一校正阻抗之间的差异大于预设值，则执行步骤（S220）的步骤（S260），并且如果差值较小则执行后续步骤; 判断所述校正后的阻抗是否在保护范围内的步骤（S270）以及如果校正后的阻抗不在保护范围内，则执行滤波步骤的步骤（S280），如果校正的阻抗下降，则产生跳闸信号。

IPRDB

热门服务

关于我们

友情链接

联系方式