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目的了解CRH2和CRH5两型动车车厢内和站台工频电场强度。方法用工频电场场强仪监测两型动车各7套车底的42节车厢工频电场强度,以及动车停靠和运行时的工频电场强度,并取站台没有车辆停靠时的工频电场强度作为对照。结果 CRH2与CRH5动车在停靠和运行时的车厢连接处的电场强度均高于其他车厢,差异有统计学意义(P<0.05)。CRH2与CRH5窗口玻璃内侧不同距离的电场强度差异有统计学意义(P<0.05),其中距玻璃0 cm时电场强度最强。CRH2车厢内电机位的电场强度高于受电弓,差异有统计学意义(P<0.05)。站台无车辆停靠时,垂直距1.5 m处的电场强度高于0 m处,差异有统计学意义(P<0.05)。结论动车车厢可有效屏蔽接触网动力电源及动车的电机电场。
Objective To understand the power frequency electric field strength in the CRH2 and CRH5 two-type trains and on the platform. Methods The power frequency electric field intensity of 42 cars at the bottom of each 7 sets of two types of motor vehicles was monitored by power frequency electric field strength meter and the power frequency electric field strength when the motor car stopped and running. as comparison. Results The electric field intensity of the junction between CRH2 and CRH5 train cars at the time of docking and operation was higher than that of other cars, the difference was statistically significant (P <0.05). The electric field intensities at different distances inside the CRH2 and CRH5 window glass were statistically significant (P <0.05), of which the electric field intensity was the strongest at 0 cm from the glass. The electric field strength in the motor position of CRH2 was higher than pantograph, the difference was statistically significant (P <0.05). When there was no parking on the platform, the electric field intensity at 1.5 m vertical distance was higher than 0 m, the difference was statistically significant (P <0.05). Conclusion The car compartment can effectively shield the catenary power supply and the electric field of the motor car.