CN107640034B - System and method for detecting voltage type of contact net of electric locomotive - Google Patents
System and method for detecting voltage type of contact net of electric locomotive Download PDFInfo
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- CN107640034B CN107640034B CN201710668881.8A CN201710668881A CN107640034B CN 107640034 B CN107640034 B CN 107640034B CN 201710668881 A CN201710668881 A CN 201710668881A CN 107640034 B CN107640034 B CN 107640034B
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Abstract
The invention discloses a system and a method for detecting the voltage type of a contact network of an electric locomotive.A pantograph PG of the electric locomotive acquires electric energy from the contact network, a voltage detection module TV1 and a current detection module CV1 are used for detecting a network voltage signal V and a current signal I output by the pantograph and inputting the network voltage signal V and the current signal I to a control unit CVCE, the control unit CVCE outputs a control signal to a vacuum circuit breaker HVCB and a high-speed circuit breaker HSCB according to the combination of the input signals, the vacuum circuit breaker HVCB is used for a main circuit switch of the locomotive in an alternating current power supply system, and the high-speed circuit breaker HSCB is used for a main circuit switch of the locomotive in a direct current power supply system.
Description
Technical Field
The invention relates to the technical field of detection of voltage types of contact networks of electric locomotives, in particular to a system and a method for detecting voltage types of contact networks of electric locomotives.
Background
In recent years, the technical level of domestic electric locomotive manufacturing enterprises has advanced greatly, and with the implementation of the national strategy of 'going away', domestic related enterprises are more and more participating in the international electric locomotive market.
At present, various power supply systems exist in the trunk line electrified railways of various countries at the same time. According to statistics, the worldwide railway power supply voltage systems are more than 28, but the most common power supply systems are only 1.5kV direct current, 3kV direct current, 25kV50Hz and the like. Due to the fact that the historical traditions of each country and each railway are different, the standardized direction of the determined railway equipment is different. Therefore, only one power supply system is adopted, and two or more power supply systems are adopted. There are more than 43 countries using two power supply systems of DC and AC, and these countries select electric locomotives suitable for two power supply systems of AC and DC for reducing the cost of purchasing and maintaining the locomotives.
The main circuit switch of the locomotive adopts different types of devices under different power supply modes, and adopts a vacuum main circuit breaker under an alternating current power supply mode; a high-speed circuit breaker is adopted in a direct-current power supply system. The two circuit breakers have different working principles and different applicable power supply systems, and if the two circuit breakers are closed simultaneously or a high-speed circuit breaker is closed in an alternating current power supply system and a vacuum main circuit breaker is closed in a direct current power supply system, serious faults are generated, and locomotive parts are damaged. Because the domestic electrified railway only adopts one 25kV50Hz power supply system, and does not need to be suitable for electric locomotives with two power supply systems of alternating current and direct current at the same time, a corresponding contact network voltage type detection system does not exist.
Disclosure of Invention
The invention provides a system and a method for detecting the voltage type of a contact network of an electric locomotive, which are used for ensuring that the electric locomotive closes a corresponding main circuit breaker according to different power supply systems, avoiding the occurrence of locomotive faults and improving the operation safety of the locomotive.
The technical scheme includes that the system is a system for detecting the voltage type of a contact network of an electric locomotive, an electric locomotive pantograph PG obtains electric energy from the contact network, a voltage detection module TV1 is used for detecting a network voltage signal V output by the pantograph, a current detection module CV1 is used for detecting a current signal I output by the pantograph, the detected signal is input to a control unit CVCE, the control unit CVCE is used for outputting a control signal to a vacuum circuit breaker HVCB and a high-speed circuit breaker HSCB, the vacuum circuit breaker HVCB is used for a main circuit switch of the locomotive in an alternating current power supply system, and the high-speed circuit breaker HSCB is used for a main circuit switch of the locomotive in a direct current power supply system.
In the method for detecting the voltage type of a contact network of an electric locomotive, under an alternating current power supply system, a voltage detection module TV1 outputs a network voltage signal V which is larger than zero, a current signal I output by a current detection module CV1 is zero, and a control unit CVCE outputs a vacuum circuit breaker HVCB closing signal to control the HVCB to be closed;
under the direct current power supply system, a network voltage signal V output by the voltage detection TV1 is zero, a current signal I output by the current detection module CV1 is larger than zero, and the control unit CVCE outputs a high-speed circuit breaker HSCB closing signal to control the HSCB to close.
The invention has the beneficial effects that: the contact network voltage type detection system of the electric locomotive is suitable for power supply type detection in an alternating current mode and a direct current mode, can ensure that the electric locomotive closes corresponding locomotive main circuit switches in different power supply modes, avoids locomotive faults and improves the locomotive running safety.
Drawings
Fig. 1 is a diagram of a system for detecting the voltage type of a catenary of an electric locomotive according to the invention.
FIG. 2 is a control logic block diagram of the control method of the present invention.
Detailed Description
The invention will be further described with reference to fig. 1 and fig. 2, and as shown in fig. 1, the equipment numbers and functions in the system for detecting the voltage type of the catenary of the electric locomotive according to the invention are as follows:
PG: an electric locomotive pantograph;
HVCB: the vacuum circuit breaker is used for a locomotive main circuit switch under an alternating current power supply system;
HSCB: the high-speed circuit breaker is used for a locomotive main circuit breaker in a direct-current power supply system;
CVCE: the control unit outputs corresponding control signals according to different input signal combinations;
TV 1: and a voltage detection module. When alternating current is supplied, a network voltage signal is output; and when the direct current is used for supplying power, the network voltage signal is zero.
CV 1: and a current detection module. When the direct current is supplied, a current signal is output; when the alternating current is supplied, the current signal is zero.
As shown in fig. 2, in the ac power supply system, the voltage detection module TV1 outputs a network voltage signal V greater than zero, and the current detection module CV1 outputs a current signal I of zero, and the control unit CVCE outputs an HVCB closing signal according to the network voltage signal and the current signal, so as to control the HVCB to be closed.
Under the direct current supply system, a network voltage signal V output by the voltage detection TV1 is zero, a current signal I output by the current detection module CV1 is larger than zero, and the control unit CVCE outputs an HSCB closing signal according to the network voltage signal and the current signal to control the HSCB to be closed.
Claims (1)
1. The method comprises the following steps that an electric locomotive pantograph PG obtains electric energy from a contact net, a voltage detection module TV1 is used for detecting a voltage signal V output by the pantograph, a current detection module CV1 is used for detecting a current signal I output by the pantograph and inputting the detected signal to a control unit CVCE, the control unit CVCE is used for outputting a control signal to a vacuum circuit breaker HVCB and a high-speed circuit breaker HSCB, the vacuum circuit breaker HVCB is used for a locomotive main circuit switch in an alternating current power supply system, and the high-speed circuit breaker HSCB is used for a locomotive main circuit switch in a direct current power supply system;
the method is characterized in that: under an alternating current power supply system, a voltage detection module TV1 outputs a network voltage signal V larger than zero, a current detection module CV1 outputs a current signal I of zero, and a control unit CVCE outputs a vacuum circuit breaker HVCB closing signal to control the vacuum circuit breaker HVCB to close;
under the direct current power supply system, a network voltage signal V output by the voltage detection TV1 is zero, a current signal I output by the current detection module CV1 is larger than zero, and the control unit CVCE outputs a high-speed circuit breaker HSCB closing signal to control the high-speed circuit breaker HSCB to close.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710668881.8A CN107640034B (en) | 2017-08-08 | 2017-08-08 | System and method for detecting voltage type of contact net of electric locomotive |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710668881.8A CN107640034B (en) | 2017-08-08 | 2017-08-08 | System and method for detecting voltage type of contact net of electric locomotive |
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| CN107640034A CN107640034A (en) | 2018-01-30 |
| CN107640034B true CN107640034B (en) | 2020-02-21 |
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| CN201710668881.8A Active CN107640034B (en) | 2017-08-08 | 2017-08-08 | System and method for detecting voltage type of contact net of electric locomotive |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111907334A (en) * | 2019-06-18 | 2020-11-10 | 中车大同电力机车有限公司 | Pantograph, control method thereof and electric locomotive |
| CN110525275A (en) * | 2019-09-09 | 2019-12-03 | 中车株洲电力机车有限公司 | A kind of EMU alternating current-direct current circuit on side of overhead contact line and its control method |
| CN111060736A (en) * | 2019-12-13 | 2020-04-24 | 西安锐驰电器有限公司 | Vehicle-based live detection method for power transformation system |
| CN111342449B (en) * | 2020-03-07 | 2022-08-19 | 西南交通大学 | Subway contact net surfing combination hybrid direct current circuit breaker |
| CN113644813B (en) * | 2020-07-30 | 2023-10-20 | 株洲中车时代电气股份有限公司 | Control device and method for traction converter |
| CN112098705B (en) * | 2020-09-17 | 2021-10-26 | 株洲中车时代电气股份有限公司 | System and method for rapidly identifying AC/DC power supply system |
| CN115542030A (en) * | 2021-06-29 | 2022-12-30 | 中车株洲电力机车研究所有限公司 | Power supply system identification method, system and related components |
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| CN106569447A (en) * | 2016-11-14 | 2017-04-19 | 江苏林洋能源股份有限公司 | Electric energy meter having AC/DC adaptive electric energy measurement function and electric energy measurement method |
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| CN105459839A (en) * | 2015-11-24 | 2016-04-06 | 唐山轨道客车有限责任公司 | Dual-mode current collecting system and method |
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