CN202264649U

CN202264649U - Network side circuit of motor train unit

Info

Publication number: CN202264649U
Application number: CN2011204077095U
Authority: CN
Inventors: 陈平安; 林文君; 周安德; 李耘茏; 陈爱军; 李丰收
Original assignee: CSR Zhuzhou Electric Locomotive Co Ltd
Current assignee: CRRC Zhuzhou Locomotive Co Ltd
Priority date: 2011-10-24
Filing date: 2011-10-24
Publication date: 2012-06-06
Anticipated expiration: 2021-10-24

Abstract

The utility model discloses a network side circuit of a motor train unit, which comprises two power units with the same structure, wherein the two power units are connected by branch circuits of isolation switches, the branch circuits of the isolation switches are formed by connecting two isolation switches in series, and both ends of the branch circuits of the isolation switches are respectively connected between vacuum circuit breakers and primary-side current transformers of the two power units. The network side circuit disclosed by the utility model is a basically symmetrical circuit and has simple circuit type and simple equipment arrangement and wire distribution; the control of the circuit is easy to realize; and moreover, the running reliability of a train is very high.

Description

A kind of motor train unit circuit on side of overhead contact line

Technical field

The utility model relates to the High-Voltage Network lateral circuit, specifically is a kind of motor train unit circuit on side of overhead contact line.

Background technology

The former limit of existing motor train unit receives current circuit basically by pantograph; Electric original paper such as vacuum breaker, earthing switch, lightning arrester, disconnector is formed; But because different trains organizational systems and design demand, the array mode of these original papers in circuit is different, and mode is different; Make that its effect is different, so car load to be flowed the reliability height different.

Because the former limit of motor train unit receives the array mode of current circuit electric component different; Fig. 1 has provided possible a kind of motor train unit circuit on side of overhead contact line structure diagram; The motor train unit circuit on side of overhead contact line comprises two power units that structure is identical; Each power unit comprises pantograph, high voltage potential transformer, vacuum breaker, primary current transformer, back flow current transformer, main transformer, current transformer, traction electric machine and earth system, and pantograph, vacuum breaker, primary current transformer, main transformer, back flow current transformer, earth system connect successively, and two groups of outputs of main transformer are connected to a current transformer respectively; Traction electric machine is connected with current transformer; Vacuum breaker is through earthing switch ground connection, and pantograph inserts contact system, and the pantograph of two power units connects through a disconnector; Be parallel with lightning arrester between pantograph and the vacuum breaker, be parallel with lightning arrester between vacuum breaker and the current transformer that is attached thereto.

As can beappreciated from fig. 1, owing to directly with high-tension cable two pantographs are linked to each other, under the situation that a line circuit breaker fault occurs, train will lose half the power, and then makes that the redundancy of train is bad, and serviceability reduces; Owing to used a disconnector, make that the circuit structure symmetry of train is bad, and then the work capacity that increases design and make; Also exist some circuit structure not use the situation of disconnector, make the failure operation ability of train reduce, these circuit structures also possibly make the Control System Design of train, the more complicated that become such as wiring of train.

The utility model content

The utility model technical matters to be solved is, and is not enough to prior art, and a kind of simple in structure, motor train unit circuit on side of overhead contact line that control is easy is provided, and increases the reliability that flowed of train, improves the train transport capacity.

For solving the problems of the technologies described above; The technical scheme that the utility model adopted is: a kind of motor train unit circuit on side of overhead contact line; Comprise two power units that structure is identical, each power unit comprises pantograph, high voltage potential transformer, vacuum breaker, primary current transformer, main transformer, current transformer, traction electric machine, back flow current transformer and earth system, and pantograph, vacuum breaker, primary current transformer, main transformer, back flow current transformer, earth system connect successively; Two groups of outputs of main transformer are connected to a current transformer respectively; Traction electric machine is connected with current transformer, and vacuum breaker is through earthing switch ground connection, and the high voltage potential transformer parallel connection inserts between pantograph and the vacuum breaker; Pantograph inserts contact system; Two power units connect through the disconnector branch road, and disconnector props up two disconnectores of route and is in series, and the two ends of disconnector branch road are inserted respectively between the vacuum breaker and primary current transformer of two power units.

Be parallel with lightning arrester between pantograph and the vacuum breaker, be parallel with lightning arrester between vacuum breaker and the primary current transformer.

When breaking down in the equipment in the power unit; Break off disconnector, make that the connection between two power supply units is broken off, the power supply unit of fault is isolated; The power unit normal operation that maintenance is not broken down makes train that half the power maintenance operation arranged.

The circuit on side of overhead contact line of the utility model is a kind of circuit of basic symmetry, and the circuit pattern is simple, and facility location, wiring are simple; This circuit control realizes easily, and the serviceability of train is very high.Avoid rescue, the proteges of the powerful who stay with their benefactions like parasites occurring, also improve transport capacity greatly, considerable economic benefit is arranged, for homogeneous circuit reference is arranged also simultaneously.

Description of drawings

Fig. 1 is existing a kind of motor train unit circuit on side of overhead contact line structure principle chart;

Fig. 2 is the utility model one embodiment motor train unit circuit on side of overhead contact line structure principle chart.

Wherein:

1: contact system; 2,10: pantograph; 3: high voltage potential transformer; 4,9: vacuum breaker; 5: lightning arrester; 6: earthing switch; 7: high voltage isolator; 8: the high pressure wire jumper between vehicle; 11: the primary current transformer; 12: current transformer; 13: main transformer; 14: traction electric machine; 15: the back flow current transformer; 16: earth system.

The specific embodiment

As shown in Figure 2, the utility model one embodiment motor train unit have two identical power units, connect through high-tension cable between two unit.Contact system 1 is passed through on the former limit of motor train unit main transformer 13, pantograph 2 or 10, and vacuum breaker 4 or 9 gets.The traction winding on 13 limits of main transformer is to main convertor power supply 12, and main convertor 12 is supplied power to traction electric machine 14 through the AC-DC-AC conversion, thereby realizes the traction and the electric braking of permutation car.Simultaneously, main transformer 13 mouths connect earth system 16, realize the working earthing of train.

Under normal operation; Train only rises a pantograph (generally being the cantle of relative service direction); And the vacuum breaker that only closed direct pantograph therewith is connected, simultaneously to the main transformer power supply of another power unit, another pantograph is in falls the bow position through high-tension cable; Another vacuum breaker will be provided with to be locked in automatically and break off the position through control system software, and realize electrical isolation through the vacuum breaker of locking.

At two high voltage isolator 7 is set between the power supply unit independently; Be used in the connection of breaking off under the improper situation between two power supply units; And the power supply unit of fault is isolated; Train still has half the power to keep operation, and train is parked on the circulation line, and major failures such as rescue take place.

Claims

1. motor train unit circuit on side of overhead contact line; Comprise two power units that structure is identical; Each power unit comprises pantograph, high voltage potential transformer, vacuum breaker, primary current transformer, main transformer, current transformer, traction electric machine, back flow current transformer and earth system, and pantograph, vacuum breaker, primary current transformer, main transformer, back flow current transformer, earth system connect successively, and two groups of outputs of main transformer are connected to a current transformer respectively; Traction electric machine is connected with current transformer; Vacuum breaker is through earthing switch ground connection, and the high voltage potential transformer parallel connection inserts between pantograph and the vacuum breaker, and pantograph inserts contact system; It is characterized in that; Two power units connect through the disconnector branch road, and disconnector props up two disconnectores of route and is in series, and the two ends of disconnector branch road are inserted respectively between the vacuum breaker and primary current transformer of two power units.

2. motor train unit circuit on side of overhead contact line according to claim 1 is characterized in that, is parallel with lightning arrester between pantograph and the vacuum breaker, vacuum breaker and and the primary current transformer between be parallel with lightning arrester.