CAJ | 학술논문

提出了监测点在监测时间段内电压暂降引起敏感设备故障频次的研究方法。在生活生产中，电压暂降对敏感设备的破坏是一种严重的电能质量问题，电压暂降引起敏感设备从安全状态到故障状态存在一个过渡过程，敏感设备在电压暂降耐受区域内故障与否存在不确定性。本方法运用概率密度函数刻画电压暂降发生在不确定域内时引起敏感设备故障的情况，通过统计监测点在该时间段内各次电压暂降事故的特征量，通过多点测定累积得出敏感设备在该时段内的故障频次。用台式计算机作为实验设备验证本方法，并与运用ITIC曲线得出的结果进行比较，证明该方法的优越性与准确性。
제출료감측점재감측시간단내전압잠강인기민감설비고장빈차적연구방법。재생활생산중，전압잠강대민감설비적파배시일충엄중적전능질량문제，전압잠강인기민감설비종안전상태도고장상태존재일개과도과정，민감설비재전압잠강내수구역내고장여부존재불학정성。본방법운용개솔밀도함수각화전압잠강발생재불학정역내시인기민감설비고장적정황，통과통계감측점재해시간단내각차전압잠강사고적특정량，통과다점측정루적득출민감설비재해시단내적고장빈차。용태식계산궤작위실험설비험증본방법，병여운용ITIC곡선득출적결과진행비교，증명해방법적우월성여준학성。
A method calculating the fault frequency of sensitive equipment caused by voltage sag in the monitoring pe-riod is proposed. In life and production, destruction of sensitive equipment caused by voltage sag is a serious power quality problem. Voltage sag causes the state change of the sensitive equipment from safe state to fault state, which is a transient process and it is uncertain whether the equipment is faulty in the region of the voltage tolerance curve ( VTC) . In the paper, we use the probability density function to characterize the fault state caused by voltage sag hap-pened in the region of VTC, and use the cumulative method to calculate fault frequency of the sensitive equipment through the voltage sag characteristic parameters in the period of monitoring time. Desktop computers are used as ex-periment equipment to verify the proposed method, and result comparison with that calculated using the ITIC curve shows the advantage and accuracy of the method.