A Stability Analysis Method for Electric Coupling System of Crh5 Type EMU Put into Multi-vehicle Network
A technology of system stability and electrical coupling, applied in general control systems, control/regulation systems, instruments, etc., can solve problems such as low-frequency oscillation of vehicle network electrical coupling systems
Active Publication Date: 2022-05-13
LANZHOU JIAOTONG UNIV
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[0007] The purpose of the present invention is to provide a method for analyzing the stability of the electrical coupling system of multiple trains in the CRH5 EMU, aiming at analyzing the low-frequency oscillation of the electrical coupling system of the train network caused by the mismatch between the parameters of the traction network and the parameters of the CRH5 EMU question
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[0038] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0039] 1. Improved SUM-norm criterion
[0040] When analyzing the stability of the coupled system according to the generalized Nyquist stability criterion, it is necessary to obtain the eigenvalues of the return ratio matrix and draw the eigenvalue trajectory. The return ratio matrix is the product of the output impedance matrix and the input admittance matrix. The calculation of the matrix is relatively complicated, and the workload of data processing using the generalized Nyquist criterion is large, so it is inconvenient to be directly used to analyze the stability analysis of the vehicle-n...
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The invention discloses a method for analyzing the stability of a CRH5-type EMU into a multi-vehicle-network electrical coupling system. The method includes the following steps: S1. The critical condition for the stability of the train-network coupling system through the improved new SUM-norm criterion Carry out analysis to obtain the number of EMUs that cause low-frequency oscillations in the vehicle-network coupling system; S2. Build a time-domain simulation model of the multi-vehicle-network electrical coupling system, and compare the critical conditions for the low-frequency oscillation of the multi-vehicle-network electrical coupling system obtained from the simulation with the new The critical conditions obtained by the SUM-norm criterion are compared to verify the correctness of the new SUM-norm criterion. The method for analyzing the stability of the CRH5-type EMU into multi-vehicle-network electrical coupling system can accurately analyze the critical condition for low-frequency oscillation of the train-network electrical coupling system, that is, the number of EMUs that are simultaneously hoisted and repaired, which is of great importance Theoretical guidance and practical significance.
Description
technical field [0001] The invention belongs to the technical field of high-speed rail control, and in particular relates to a method for analyzing the stability of a CRH5 type EMU into a multi-vehicle network electrical coupling system. Background technique [0002] In recent years, my country's electrified railway has achieved rapid development. In terms of the development of heavy-duty electrified railway, the annual transportation volume of Daqin Railway has exceeded 400 million tons, and 20,000 tons of single-row heavy-duty trains can be operated; With the opening of the high-speed railway and Shiji high-speed railway, as of the end of 2017, my country's high-speed railway has reached 25,000 kilometers, and more than 2,300 pairs of trains are opened every day. With the rapid development of heavy-duty electrified railways and high-speed railways, HXD series electric locomotives, CRH series Harmony EMUs, and CR series Fuxing EMUs are running at high density and high speed ...
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IPC IPC(8): G05B17/02
CPCG05B17/02
Inventor 王英母秀清王迎晨陈小强李琪瑶陈思彤陈剑箫
Owner LANZHOU JIAOTONG UNIV