CN111293781A - Railway signal power supply circuit - Google Patents
Railway signal power supply circuit Download PDFInfo
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- CN111293781A CN111293781A CN202010228231.3A CN202010228231A CN111293781A CN 111293781 A CN111293781 A CN 111293781A CN 202010228231 A CN202010228231 A CN 202010228231A CN 111293781 A CN111293781 A CN 111293781A
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- phase
- power supply
- ups
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a railway signal power circuit, which comprises a single-phase AC/DC charging module, double UPS sets, a single battery pack and an output power distribution module, wherein a three-phase external power grid is connected with a main circuit input end and a bypass input end of each UPS set and is also connected with the single-phase AC/DC charging module; the single-phase external power grid is connected with a switching power supply module and the single-phase AC/DC charging module, and the output end of the switching power supply module is connected to the battery input end of each UPS; the output of the single-phase AC/DC charging module is connected in parallel to charge the battery pack, and the output end of the battery pack is connected with the battery input end of each UPS through a diode. The two external power networks and the voltage stabilizing system realize a redundant standby working mode, namely a stable and reliable three-phase power supply can be output under any condition; the charging module also realizes parallel redundancy; the three-phase load device can obtain the required power supply even under the condition of single-phase power supply.
Description
Technical Field
The invention belongs to the technical field of two paths of power supply systems, and particularly relates to a railway signal power supply circuit under the condition that one path of two input power supplies in a railway signal power supply system is a three-phase power supply, and the other path of the two input power supplies in the railway signal power supply system is a single-phase power supply, so that the two input power supplies in the signal power supply system are mutually redundant and mutually standby, and a reliable three-phase power supply system circuit can be provided for three-phase load equipment.
Background
Because the railway standards and the site basic conditions of various countries are greatly different from those of China, railway equipment and the technical scheme also need to be adaptively designed according to actual requirements, and two paths of external networks I exist abroad, namely a three-phase main power supply is 400/230V and 50 HZ; the II circuit is a single-phase power supply and comes from 25/0.23kV and 50HZ of a contact network, namely an external power grid is a three-phase and single-phase power supply hybrid redundant power supply mode. The situation is different from the situation that most of the railway station external power grid in China is redundant of two three-phase power supplies and less of the railway station external power grid is redundant of two single-phase power supplies.
Therefore, the power system architecture needs to be redesigned to meet the requirement that the single-phase power grid can ensure long-time power supply in the state that the three-phase power grid is in the state of no power for a long time, and the requirement that the three-phase power supply is in the state that the single-phase power grid is in the state of no power. Meanwhile, after the two paths of external power networks are powered off, the signal power supply system still needs to provide stable and reliable power for the signal equipment for more than 3-8 hours, namely the requirement on battery capacity is high, but the area of an on-site mechanical room is limited, and the comprehensive consideration needs to be given to the power supply framework of the power supply system.
Disclosure of Invention
In view of the above, the present invention is directed to a railway signal power circuit, which is a system circuit that ensures that two input power sources in a signal power system are redundant and mutually backup and can provide reliable three-phase power for three-phase load devices when one input power source is a three-phase power source and the other input power source is a single-phase power source.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a railway signal power circuit comprises a single-phase AC/DC charging module, double UPS sets, a single battery pack and an output power distribution module, wherein a three-phase external power grid is connected with a main circuit input end and a bypass input end of each UPS set sequentially through an under-voltage detection circuit and an input contactor and is also connected with the single-phase AC/DC charging module; the single-phase external power grid is connected with the switching power supply module and the single-phase AC/DC charging module sequentially through the under-voltage detection circuit and the input contactor, and the output end of the switching power supply module is connected to the battery input end of each UPS; the output ends of the single-phase AC/DC charging modules are connected in parallel and then charge the battery pack, and the output end of the battery pack is connected with the battery input end of each UPS through a diode; the output end of the UPS is connected with a load through an output power distribution module.
Further, a diode is connected to a direct current input end of the UPS.
Furthermore, the output end of the switching power supply module is connected to the battery input end of each UPS through a diode.
Compared with the prior art, the invention has the following advantages:
(1) under the condition that two paths of power grids work normally at the same time, a stable and reliable three-phase power supply is provided for a rear-stage load by a three-phase power grid through UPS voltage stabilization output, and meanwhile, a battery is charged and managed through a single-phase AC/DC charging module; and the single-phase power grid supplies power to the single-phase input switch power supply module, so that the module is in a standby state for a long time, and meanwhile, the single-phase power grid also carries out charging management on the battery through the charging module. When the three-phase power grid is powered off, the single-phase power grid can provide energy for the load for a long time; and after the two paths of power grids are powered off, the fully charged battery pack continuously provides energy for the rear-stage load for a certain time, so that the standby redundancy problem of on-site single-phase and three-phase power grid hybrid power supply is solved.
(2) After the working mode design of the two paths of power grids is completed, redundant standby working modes of the two paths of external power grids and the voltage stabilizing system are realized, namely a stable and reliable three-phase power supply can be output under any condition; the charging module also realizes parallel redundancy; even under the condition of single-phase power supply, the three-phase load equipment can obtain required power supply, and other single-phase loads can be provided with the related power distribution unit modules according to requirements. The on-site requirement is met, and the reliability, safety and maintainability of the signal power supply system are realized.
(3) The two paths of power grids are neither Y-type circuits of traditional main-standby conversion, but also have certain difference with H-type circuits, and the two circuits are recombined, so that the problem of frequent switching in the use of the H-type circuits is solved, and the power grid conditions of the line engineering are met; the method has strong applicability in railway signal power supply, has wide application prospect and brings good economic and social benefits.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a block diagram of a railway signal power supply circuit according to an embodiment of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
The railway signal power circuit of the following figure 1 comprises a single-phase AC/DC charging module, a double UPS, a single battery pack, an output power distribution module, an output isolation unit, a monitoring unit and the like,
the three-phase external power grid is connected with the main circuit input end and the bypass input end of each UPS through the under-voltage detection circuit and the input contactor in sequence and is also connected with the single-phase AC/DC charging module;
the single-phase external power grid is connected with the switching power supply module and the single-phase AC/DC charging module sequentially through the under-voltage detection circuit and the input contactor, and the output end of the switching power supply module is connected to the battery input end of each UPS;
the output ends of the single-phase AC/DC charging modules are connected in parallel and then charge the battery pack, and the output end of the battery pack is connected with the battery input end of each UPS through a diode; the output end of the UPS is connected with a load through an output power distribution module.
1) Uninterrupted switching mode for two-way external network work
Most of the signal power supply systems adopt a Y-shaped circuit with two paths of external power networks mutually converting between a main power network and a standby power network, namely when one path of external power network is normal, the signal power supply system supplies power to all loads; when the system is abnormal, all loads of the system are switched to the other path of standby power supply through a contactor or a switching device with contacts such as an ATS (automatic transfer switching system).
The signal power supply system adopts an H-shaped circuit that two paths of power grids are adopted for supplying power to the load at the same time at a small part, and when one path is abnormal, part of the load born by the signal power supply system is switched to the other path through a contactor and is completely born by the other path. Because the probability of two paths of external power networks being abnormal is far greater than that of one path of external power networks, and particularly when one path of external power network is unstable, the H-shaped circuit can be frequently switched by contacts, so that more equipment problems and potential safety hazards are caused.
The circuit of the embodiment introduces two paths of external power networks through different input ends of the UPS, realizes power supply for a load through the rectification inversion power supply loop of the UPS and the direct current inversion power supply loop of the battery respectively, realizes uninterrupted switching power supply of the two paths of input external power networks by using the control of the interior of the UPS on the controlled silicon, and solves a series of problems of arc discharge, tripping and contact discontinuous switching caused by Y-shaped and H-shaped contact switching.
The concrete description is as follows: for the UPS, the power input includes three kinds of main circuit input, bypass input and battery input, and the main circuit and the bypass can only be AC three-phase power supply. Therefore, the circuit is provided with the overvoltage and undervoltage detection circuit at the three-phase input end, when the voltage of the three-phase power grid is in the working range, the input contactor is controlled to suck up the alternating current input power supply for the main circuit input and the bypass input of the three-phase UPS, the alternating current power supply realizes the alternating current bus supplying power to the load through AC/DC and DC/AC inside the UPS, and the alternating current bus supplies power to the load through different power supply conversion. The input end of the single-phase power grid is provided with an over-voltage and under-voltage detection circuit, when the voltage of the single-phase power grid is in a working range, the input contactor is controlled to suck up, a single-phase power supply is introduced, then the single-phase power supply is connected into the switching power supply module, the single-phase external power grid is converted into a stable direct-current power supply through the switching power supply module, the direct-current power supply analog battery pack is connected into the battery input end of the UPS to supply the energy of the UPS, when the three-phase external power grid is powered off, the single-phase power grid converts the single-phase power supply analog battery pack into a stable and reliable three-phase power supply. The circuit is also suitable for the condition that two external power grids are three-phase input.
2) Circuit design of common battery pack and analog battery charging module
Because the signal power supply screen still needs to continue to work normally for a long time after two paths of power grids are powered off, if a dual-machine parallel UPS working system is used, the fact that the follow current time of equipment still needs to be guaranteed by the remaining UPS after one UPS fails is taken into consideration, if the UPS is used according to parallel operation and is provided with a storage battery respectively and independently, the number of batteries of a power supply system is huge, equipment cost, construction installation workload and later maintenance workload are increased, and the space occupation of a mechanical room is large. Therefore, the use of batteries should be minimized under the conditions of ensuring the safety and reliability of the equipment and meeting the requirements of the field.
The circuit structure that two UPS shares a single battery pack is designed according to the situation, because the power supply module is connected with the battery pack in parallel, the UPS can not be used for charging management of the battery pack, if the UPS is used for charging management of the battery pack, and the switch power supply module can also charge the battery pack at the same time, the charging current of the battery pack is not controlled, the circulation current influence is also generated between the parallel UPSs, the battery pack is also damaged, and the whole system has great uncertain risks.
The circuit of the invention uses diodes at the output end of the battery pack, so that neither the switch power supply module nor the UPS can charge the battery pack, and the diodes are respectively added at the direct current ends of the two UPS, so that a passage is not formed between the direct current buses of the two UPS, and mutual influence cannot be caused, and the UPS can only draw energy from the input port of the battery after the power failure of a power grid or the failure of the UPS rectifier.
Meanwhile, the charging management of the battery pack is redesigned by the circuit, namely: the battery is managed using a separate single phase AC/DC charging module. Considering that the two power grids can charge and manage the battery pack under the normal condition of any one power grid, a proper single-phase AC/DC charging module is selected according to the capacity of the battery to respectively obtain power from the two external power grids, and the output is connected in parallel to charge the battery pack. When two external power grids are normal, the battery pack can be charged together, and after any one power grid is abnormal, the battery pack can be continuously charged by the other power grid through the single-phase AC/DC charging module, so that the effective management of the battery pack is ensured, meanwhile, the energy storage can be realized by using a single battery pack, and the floor area and the construction and maintenance costs of the battery pack are reduced.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (3)
1. A railway signal power supply circuit characterized by: comprises a single-phase AC/DC charging module, a double UPS, a single battery pack and an output power distribution module,
the three-phase external power grid is connected with the main circuit input end and the bypass input end of each UPS through the under-voltage detection circuit and the input contactor in sequence and is also connected with the single-phase AC/DC charging module;
the single-phase external power grid is connected with the switching power supply module and the single-phase AC/DC charging module sequentially through the under-voltage detection circuit and the input contactor, and the output end of the switching power supply module is connected to the battery input end of each UPS;
the output ends of the single-phase AC/DC charging modules are connected in parallel and then charge the battery pack, and the output end of the battery pack is connected with the battery input end of each UPS through a diode; the output end of the UPS is connected with a load through an output power distribution module.
2. A railway signal power supply circuit as claimed in claim 1, wherein: and the direct current input end of the UPS is connected with a diode.
3. A railway signal power supply circuit as claimed in claim 1, wherein: and the output end of the switching power supply module is connected to the battery input end of each UPS through a diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010228231.3A CN111293781A (en) | 2020-03-27 | 2020-03-27 | Railway signal power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010228231.3A CN111293781A (en) | 2020-03-27 | 2020-03-27 | Railway signal power supply circuit |
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| CN111293781A true CN111293781A (en) | 2020-06-16 |
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| CN202010228231.3A Pending CN111293781A (en) | 2020-03-27 | 2020-03-27 | Railway signal power supply circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112419633A (en) * | 2020-09-30 | 2021-02-26 | 广东广晟通信技术有限公司 | Anti-theft alarm device using public communication network |
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2020
- 2020-03-27 CN CN202010228231.3A patent/CN111293781A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112419633A (en) * | 2020-09-30 | 2021-02-26 | 广东广晟通信技术有限公司 | Anti-theft alarm device using public communication network |
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