Prediction of Optimal Catenary Tension by Dynamic Characteristic Measurement and Dynamic Analysis of Pantograph in High-Speed Train

고속열차 팬터그래프 동특성 측정 및 동역학 해석을 통한 최적 전차선 장력 예측

Abstract

The contact force, which is the dynamic interaction between the pantograph and the catenary, is an important indicator for evaluating the current collecting quality, which is a stable power supply characteristic to the vehicle. In this study, dynamic contact force characteristics of pantograph of HEMU-430X vehicle, which is a power-distributed high-speed train test vehicle, were analyzed according to the catenary tension and compared with the analytical results using the pantograph-catenary interaction model. As a result of comparing the test results with the analytical results, it was confirmed that the average contact force and the standard deviation of the contact force, which are the main dynamic contact force characteristics, coincide relatively well. Using the analytical model, the relationship between the catenary tension and the contact force is presented according to the vehicle speed, and the optimal catenary tension for each operation speed is presented and compared with the international standard. As a result, it was found that the results obtained from the analysis are comparable to those recommended by international standards.

팬터그래프(Pantograph)와 전차선간의 동적 상호작용인 접촉력(contact force)은 차량에 대한 안정적 전원공급 특성인 집전성능을 평가하는 중요한 지표이다. 본 연구에서는 동력분산형 고속열차 시험차량인 HEMU-430X(High-speed Electric Multiple Unit - 430km/h eXperiment) 차량의 팬터그래프 동적 접촉력 특성을 전차선 장력에 따라 분석하였고, 이를 팬터그래프-전차선 동적 상호작용 모델을 이용한 해석결과와 비교하였다. 시험결과와 해석결과를 비교한 결과, 주요 동적접촉력 특성인 평균접촉력 및 접촉력 표준편차가 비교적 잘 일치하는 것을 확인하였다. 또한 해석모델을 이용하여 전차선 장력과 접촉력과의 상관관계를 차량 운행속도에 따라 제시하였으며, 이를 이용하여 각 운영속도별 최적 전차선 장력을 제시하였고 이를 국제규격과 비교하였다. 그 결과 해석을 통해 도출된 결과와 국제 규격에서 권장하는 전차선 장력이 비교적 잘 일치하는 것을 알 수 있었다.

Fig. 1. Installation of Load cell and Accelerometer

Fig. 2. The locations of sensor installation

Fig. 3. Contact Force Measurement results of full operation region

Fig. 4. Data extraction for Contact force analysis

Fig. 5. experimental results : the mean contact force depending on the train speed

Fig. 6. experimental results : the standard deviation of contact force depending on the train speed

Fig. 7. Dynamic interaction model for the catenary and pantograph

Fig. 8. Two D.O.F model of HEMU Pantograph

Fig. 9. Comparison between test results and dynamic analysis for standard deviation of contact force

Fig. 10. Analytical prediction depending on the tension of the catenary (Span length : 50m)

Fig. 11. Analytical prediction depending on the tension of the catenary (Span length : 60m)

Table 1. Test Condition

Table 2. Mechanical Properties of HEMU Pantograph

Table 3. Optimal Tension of Catenary