【摘要】：架空線(xiàn) 電纜混聯(lián)輸電線(xiàn)路發(fā)生故障時(shí),單端故障行波難以辨識(shí),無(wú)法直接用以定位故障點(diǎn)。為提升單端量測(cè)距的實(shí)用性,提出一種基于故障距離區(qū)間的混聯(lián)輸電線(xiàn)路單端行波故障測(cè)距方法。首先,利用基于單端工頻量的逐段推演故障區(qū)段法,初步劃定故障距離區(qū)間,并通過(guò)在線(xiàn)估算對(duì)端等值阻抗以確保所劃定的區(qū)間的正確性;然后,分析劃定的區(qū)間內(nèi)的行波傳播規(guī)律,構(gòu)建故障點(diǎn)精確定位方法,針對(duì)區(qū)段連接點(diǎn)鄰域內(nèi)故障的特殊場(chǎng)景,提出連接點(diǎn)故障識(shí)別判據(jù)和故障區(qū)段判據(jù);最后,通過(guò)剔除待辨識(shí)波頭所在區(qū)間內(nèi)的干擾波確保算法精度和可靠性。仿真結(jié)果表明,該方法測(cè)距精度高,不存在區(qū)段連接點(diǎn)鄰域測(cè)距死區(qū),通用于多段混聯(lián)輸電線(xiàn)路,具備較高的實(shí)用價(jià)值。
[Abstract]:It is difficult to identify the traveling wave of the single terminal fault and can not be used directly to locate the fault point when the fault of the hybrid transmission line of overhead line or cable occurs. In order to improve the practicability of single terminal location, a single terminal traveling wave fault location method for hybrid transmission lines based on fault distance interval is proposed. Firstly, the fault distance interval is preliminarily determined by using the one-terminal power frequency method, and the equivalent impedance of the terminal is estimated online to ensure the correctness of the defined interval. Then, the traveling wave propagation law in the defined interval is analyzed, and the accurate location method of fault point is constructed, and the fault identification criterion and fault section criterion are put forward for the special scene of fault in the neighborhood of the joint point of the section. Finally, the accuracy and reliability of the algorithm are ensured by eliminating the interference waves in the interval of the wave head to be identified. The simulation results show that the method has high ranging accuracy and no dead zone in the vicinity of the section connecting points. It is commonly used in multi-segment hybrid transmission lines and has high practical value.
【作者單位】： 電網(wǎng)智能化調(diào)度與控制教育部重點(diǎn)實(shí)驗(yàn)室(山東大學(xué));
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(51177091)~~
【分類(lèi)號(hào)】：TM75

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