Vehicle-network model construction method for vehicle automatic passing neutral section of multiple unit

Abstract

The invention discloses a vehicle-network model construction method for vehicle automatic passing neutral section of multiple unit, including the following steps: step 1, dividing a passing neutral section transient process of a long marshal multiple unit; step 2, obtaining a vehicle-network coupling distribution according to the transient process divided the step 1; step 3, constructing a vehicle-network system topological structure of different parts according to the vehicle-network coupling distribution result obtained in step 2; step 4, fitting an arc phenomenon during the occurrence of each transient process by the arc model according to the topological structure obtained in step 3. According to the vehicle-network model construction method for vehicle automatic passing neutral section of multiple unit, the capacitive coupling between the contact line, the neutral line and the vehicle body is considered, the vehicle-network coupling between the contact line and the neutral line cross section in the neutral section is also considered in detail, and an accurate overvoltage can be obtained.

Description

technical field [0001] The invention relates to a method for constructing a model of an EMU, in particular to a method for constructing a vehicle-network model with automatic phase separation on board the EMU. Background technique [0002] When the high-speed EMU coasts through the on-board automatic electric phase separation, it will go through a process of "power - no power - power", which makes the topology of the entire traction network change continuously in a short period of time, and then overvoltage occurs many times. The arc phenomenon of the electric train will also aggravate the occurrence of overvoltage and threaten the driving safety; therefore, it is necessary to accurately analyze the electromagnetic transient process of the automatic phase separation of the EMU to suppress the overvoltage; The vehicle-network model when the state process occurs is used to calculate or simulate the overvoltage; the existing research has the following problems: first, it only f...

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Problems solved by technology

[0002] When the high-speed EMU coasts through the on-board automatic electric phase separation, it will go through a process of "power - no power - power", which makes the topology of the entire traction network change continuously in a short period of time, and then overvoltage occurs many times. The arc phenomenon of the electric train will also aggravate the occurrence of overvoltage and threaten the driving safety; therefore, it is necessary to accurately analyze the electromagnetic transient process of the automatic phase separation of the EMU to suppress the overvoltage; The vehicle-network model when the state process occurs is used to calculate or simulate the overvoltage; the existing research has the following problems: first, it only focuses on the situation of short-marshaled EMUs with excessive phase separation; second, it does not consider contact lines, neutral lines and Capacitive coupling between car bodies; Third, simplify the intersection of the contact line and the neutral line in the electric split-phase section

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