CAJ | 학술논문

傅立叶算法和最小二乘法在传统距离保护中得到了广泛应用，但2种算法均存在原理上的固有缺陷，提出了一种新的快速相量算法。该算法基于最小二乘矩阵束的原理，对补偿矩阵进行降阶处理，缩减了计算量，提高了计算效率。该方案首先利用快速相量算法提取工频分量，然后基于输电线路RL模型，利用工频测距方程，进行区内、外故障位置的判别。该方案采用的是单端电气量计算，大大提高了保护动作的灵敏性。理论分析和仿真结果均表明，该保护方案具有计算量小，精度高、受数据窗影响小等特点，具有一定的实用价值。
부립협산법화최소이승법재전통거리보호중득도료엄범응용，단2충산법균존재원리상적고유결함，제출료일충신적쾌속상량산법。해산법기우최소이승구진속적원리，대보상구진진행강계처리，축감료계산량，제고료계산효솔。해방안수선이용쾌속상량산법제취공빈분량，연후기우수전선로RL모형，이용공빈측거방정，진행구내、외고장위치적판별。해방안채용적시단단전기량계산，대대제고료보호동작적령민성。이론분석화방진결과균표명，해보호방안구유계산량소，정도고、수수거창영향소등특점，구유일정적실용개치。
In view of inherent defects in Fourier algorithm and least square algorithm, which are widely applied in traditional distance protection, a novel fast phasor extraction algorithm is proposed. Based on the principle of least square matrix pencil, the order of compensation matrix is reduced, thus the calculation amount is decreased and the calculation efficiency is improved. Firstly, the power frequency phasors are extracted by the proposed fast phasor extraction algorithm;secondly, based on RL model of transmission line and power frequency fault location equation is utilized to judge whether the fault position is inside or outside the protection zone. In the proposed distance protection scheme, only single end electric quantities are utilized, thus the sensitivity of the protection is obviously improved. Results of both theoretical analysis and simulation show that the proposed distance protection scheme possesses such advantages as small calculation amount, high accuracy, slightly affected by data window and so on, therefore it is practicable.