CN112467867A - Emergency power supply of substation, emergency power supply system and control method of emergency power supply system - Google Patents
Emergency power supply of substation, emergency power supply system and control method of emergency power supply system Download PDFInfo
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- CN112467867A CN112467867A CN202011348176.8A CN202011348176A CN112467867A CN 112467867 A CN112467867 A CN 112467867A CN 202011348176 A CN202011348176 A CN 202011348176A CN 112467867 A CN112467867 A CN 112467867A
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- substation
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000002955 isolation Methods 0.000 claims description 28
- 239000000126 substance Substances 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
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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
- H02J9/065—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 for lighting purposes
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Stand-By Power Supply Arrangements (AREA)
Abstract
The invention relates to an emergency power supply of a substation, an emergency power supply system and a control method thereof. The emergency power supply provided by the invention is not influenced by line faults, can still provide a stable power supply for the power lighting load of the substation when the looped network line fails, and has high reliability.
Description
Technical Field
The invention relates to the technical field of urban rail transit power supply systems, in particular to an emergency power supply of a substation, an emergency power supply system and a control method of the emergency power supply system.
Background
A double-loop network power supply mode is generally adopted in an urban rail transit power supply system, a bus of a traction substation is divided into two sections, each section of bus is provided with 1 incoming line and 1 outgoing line, and 2 dynamic lighting feeders and 2 traction rectification feeders are led out simultaneously. When the looped network has a line fault, the 2-path incoming line and the 2-path outgoing line quit operation, and the substation loses the power lighting power supply.
Disclosure of Invention
Based on the above situation of the prior art, the invention aims to provide an emergency power supply which can still provide stable power supply for the power lighting load of a substation under the condition that both a 2-way incoming line and a 2-way outgoing line of the substation exit from an operating condition.
In order to achieve the above object, according to one aspect of the present invention, there is provided an emergency power supply for a substation, comprising an input isolation module, an inverter module, a boost module, and an output isolation module, wherein the input isolation module, the inverter module, the boost module, and the output isolation module are connected in sequence; wherein the content of the first and second substances,
the input end of the input isolation module is connected with a direct current bus of a substation;
the inverter module and the booster module convert the input direct-current voltage into alternating-current voltage for output;
and the output end of the output isolation module is connected to an alternating current bus of the substation.
Further, the input isolation module and the output isolation module both comprise switch cabinets, and the switch cabinets are switched on when a line of the substation fails so as to convert the direct-current voltage of the direct-current bus into alternating-current voltage and output the alternating-current voltage to the alternating-current bus.
Further, the inverter module includes an inverter cabinet for inverting the input dc voltage into a three-phase ac voltage.
Further, the boosting module comprises a boosting transformer for boosting the three-phase alternating current voltage to an alternating current bus voltage.
Further, the direct current bus comprises a 1500V direct current bus.
Further, the alternating current bus comprises a 35kV alternating current bus.
According to a second aspect of the present invention, there is provided an emergency power supply system for a substation, comprising an ac bus, a dc bus, a powered lighting load, and an emergency power supply; wherein the content of the first and second substances,
the alternating current bus comprises a first section of alternating current bus and a second section of alternating current bus;
the first section of alternating current bus comprises an I section of incoming line and an I section of outgoing line, and the second section of alternating current bus comprises a II section of incoming line and an II section of outgoing line;
the powered lighting load is connected to the AC bus;
the input of the emergency power supply is connected to the dc bus and the output is connected to the ac bus, and the emergency power supply comprises an emergency power supply according to the first aspect of the invention.
Further, the lighting system also comprises a power lighting feeder line, and the power lighting load is connected to the alternating current bus through the power lighting feeder line.
According to a third aspect of the present invention, there is provided a control method of an emergency power supply system of a substation, the emergency power supply system including the emergency power supply system according to the second aspect of the present invention, the control method including:
when the circuit normally runs, the alternating current bus provides a power supply for the power lighting load through the power lighting feeder;
when a line breaks down, the I section incoming line, the I section outgoing line, the II section incoming line and the II section outgoing line are all withdrawn from operation, the input isolation module and the output isolation module of the emergency power supply are switched on, and the emergency power supply provides a power supply for the power lighting load.
In summary, the present invention provides an emergency power supply for a substation, an emergency power supply system and a control method thereof, wherein when a line fails, the emergency power supply can obtain power from a dc bus of the substation, and invert and boost the power to an ac bus voltage, so as to provide a stable power supply for a power lighting load of the substation. The emergency power supply provided by the invention is not influenced by line faults, can still provide a stable power supply for the power lighting load of the substation when the looped network line fails, and has high reliability.
Drawings
FIG. 1 is a block diagram of the emergency power supply of the substation of the present invention;
FIG. 2 is a schematic diagram of the emergency power supply of the substation of the present invention;
fig. 3 is a schematic view of the overall construction of the emergency power supply system of the substation of the present invention;
fig. 4 is a flow chart of an embodiment of the control method of the emergency power supply system of the substation.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
The technical solution of the present invention will be described in detail below with reference to the accompanying drawings. According to an embodiment of the invention, a block diagram of an emergency power supply of a substation is provided as shown in fig. 1, and the emergency power supply includes an input isolation module, an inversion module, a voltage boosting module, and an output isolation module, which are connected in sequence.
The structural schematic diagram of the emergency power supply is shown in fig. 2, and with reference to fig. 1 and 2, the input end of the input isolation module is connected with a direct current bus of a substation. Typically, the dc bus is a 1500V dc bus. The input isolation module can be a switch cabinet, and the switch cabinet is switched on when a line of a substation fails so as to input the direct-current voltage on the direct-current bus to the emergency power supply.
The inversion module and the boosting module convert the input direct-current voltage into alternating-current voltage to be output. The inversion module may comprise an inverter cabinet, inverting an input 1500V dc voltage into a three-phase 1000V ac voltage, and then applying, for example, 1 kV: a 35kV step-up transformer is connected to the 35kV ac bus.
And the output end of the output isolation module is connected to an alternating current bus of the substation. Typically, the ac bus is a 35kV ac bus. The output isolation module can be a switch cabinet, and the switch cabinet is switched on when a line of a substation fails so as to convert the direct-current voltage of the direct-current bus into alternating-current voltage and output the alternating-current voltage to the alternating-current bus.
According to a second embodiment of the present invention, an emergency power supply system for a substation is provided, and the overall configuration of the emergency power supply system is schematically shown in fig. 3. A double-loop network power supply mode is generally adopted in an urban rail transit power supply system, a bus of a traction substation is divided into two sections, each section of bus is provided with 1 incoming line and 1 outgoing line, and 2 dynamic lighting feeders and 2 traction rectification feeders are led out simultaneously. The emergency power supply system provided by the embodiment of the invention comprises an alternating current bus, a direct current bus, a power lighting load and an emergency power supply. The direct current side of the emergency power supply is connected to a 1500V bus of the substation through a 1500V switch cabinet, and the alternating current side of the emergency power supply is connected to a 35kV bus of the substation through a 35kV switch cabinet. The alternating current bus comprises a first section of alternating current bus and a second section of alternating current bus; the first section of alternating current bus comprises an I section of incoming line and an I section of outgoing line, and the second section of alternating current bus comprises a II section of incoming line and an II section of outgoing line. A powered lighting load is connected to the ac bus. The power lighting system further comprises a power lighting feeder, and the power lighting load is connected to the alternating current bus through the power lighting feeder. When the looped netowrk circuit trouble takes place, I section inlet wire, I section are qualified for the next round of competitions, II section inlet wire, II section are qualified for the next round of competitions and all withdraw from the operation, and the direct current inlet wire that 2 sets of rectifier unit correspond withdraws from the operation, and the 4 way direct current feeder of going up and down still normal operating, 1500V cubical switchboard and the 35kV cubical switchboard that emergency power source corresponds close a floodgate, and emergency power source is the three-phase 1000V alternating current with the direct current 1500V contravariant, through 1 kV: the 35kV booster transformer is connected to a 35kV bus, and the bus coupler circuit breakers of the two sections of buses are switched on, so that a stable power supply is provided for the power lighting load of the substation.
According to a third embodiment of the present invention, there is provided a control method for an emergency power supply system of a substation, the implementation flowchart of the control method is shown in fig. 4, and the control method includes:
when the circuit normally runs, the alternating current bus provides a power supply for the power lighting load through the power lighting feeder;
when a line breaks down, the I section incoming line, the I section outgoing line, the II section incoming line and the II section outgoing line are all withdrawn from operation, the input isolation module and the output isolation module of the emergency power supply are switched on, and the emergency power supply provides a power supply for the power lighting load.
In summary, the present invention relates to an emergency power supply for a substation, an emergency power supply system and a control method thereof, wherein when a line fails, the emergency power supply can take power from a dc bus of the substation, invert the power and boost the power to an ac bus voltage, thereby providing a stable power supply for a power lighting load of the substation. The emergency power supply provided by the invention is not influenced by line faults, can still provide a stable power supply for the power lighting load of the substation when the looped network line fails, and has high reliability.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (9)
1. The emergency power supply of the substation is characterized by comprising an input isolation module, an inversion module, a boosting module and an output isolation module, wherein the input isolation module, the inversion module, the boosting module and the output isolation module are sequentially connected; wherein the content of the first and second substances,
the input end of the input isolation module is connected with a direct current bus of a substation;
the inverter module and the booster module convert the input direct-current voltage into alternating-current voltage for output;
and the output end of the output isolation module is connected to an alternating current bus of the substation.
2. The emergency power supply of claim 1, wherein the input isolation module and the output isolation module each comprise a switch cabinet, and the switch cabinet is switched on when a line of the substation fails to convert a dc voltage of the dc bus into an ac voltage and outputs the ac voltage to the ac bus.
3. The emergency power supply of claim 2, wherein the inverter module comprises an inverter cabinet that inverts the input dc voltage to a three-phase ac voltage.
4. The emergency power supply of claim 3 wherein the boost module includes a boost transformer to boost the three phase AC voltage to an AC bus voltage.
5. The emergency power supply of claim 4, wherein the dc bus comprises a 1500V dc bus.
6. The emergency power supply of claim 5, wherein the AC bus comprises a 35kV AC bus.
7. An emergency power supply system of a substation is characterized by comprising an alternating current bus, a direct current bus, a power lighting load and an emergency power supply; wherein the content of the first and second substances,
the alternating current bus comprises a first section of alternating current bus and a second section of alternating current bus;
the first section of alternating current bus comprises an I section of incoming line and an I section of outgoing line, and the second section of alternating current bus comprises a II section of incoming line and an II section of outgoing line;
the powered lighting load is connected to the AC bus;
the emergency power supply has an input connected to the dc bus and an output connected to the ac bus, and comprises an emergency power supply according to any one of claims 1 to 6.
8. The emergency power system of claim 7, further comprising a powered lighting feed line, the powered lighting load being connected to the ac bus by the powered lighting feed line.
9. A control method of an emergency power supply system of a substation, characterized in that the emergency power supply system comprises the emergency power supply system according to claim 7 or 8, the control method comprising:
when the circuit normally runs, the alternating current bus provides a power supply for the power lighting load through the power lighting feeder;
when a line breaks down, the I section incoming line, the I section outgoing line, the II section incoming line and the II section outgoing line are all withdrawn from operation, the input isolation module and the output isolation module of the emergency power supply are switched on, and the emergency power supply provides a power supply for the power lighting load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011348176.8A CN112467867A (en) | 2020-11-26 | 2020-11-26 | Emergency power supply of substation, emergency power supply system and control method of emergency power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011348176.8A CN112467867A (en) | 2020-11-26 | 2020-11-26 | Emergency power supply of substation, emergency power supply system and control method of emergency power supply system |
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| Publication Number | Publication Date |
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| CN112467867A true CN112467867A (en) | 2021-03-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011348176.8A Pending CN112467867A (en) | 2020-11-26 | 2020-11-26 | Emergency power supply of substation, emergency power supply system and control method of emergency power supply system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113852062A (en) * | 2021-09-08 | 2021-12-28 | 中铁二院工程集团有限责任公司 | Rail transit power supply system based on three-phase inverter power supply device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102255332A (en) * | 2011-06-29 | 2011-11-23 | 黄俊嘉 | On-grid inverter |
| JP2013252026A (en) * | 2012-06-04 | 2013-12-12 | Mitsubishi Electric Corp | Power converter, power supply unit, and lighting device |
| CN203617778U (en) * | 2013-10-12 | 2014-05-28 | 合肥联信电源有限公司 | Multifunctional emergency power supply system |
| CN104821594A (en) * | 2015-03-27 | 2015-08-05 | 国网上海市电力公司 | Transformation and distribution station connected with energy storage system |
| CN108695969A (en) * | 2018-06-08 | 2018-10-23 | 国家电网有限公司 | A kind of emergency power supply case and its operating method |
| CN111355240A (en) * | 2018-12-21 | 2020-06-30 | 西安许继电力电子技术有限公司 | Rail transit power distribution network system, power supply system and regenerated energy inverter circuit |
-
2020
- 2020-11-26 CN CN202011348176.8A patent/CN112467867A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102255332A (en) * | 2011-06-29 | 2011-11-23 | 黄俊嘉 | On-grid inverter |
| JP2013252026A (en) * | 2012-06-04 | 2013-12-12 | Mitsubishi Electric Corp | Power converter, power supply unit, and lighting device |
| CN203617778U (en) * | 2013-10-12 | 2014-05-28 | 合肥联信电源有限公司 | Multifunctional emergency power supply system |
| CN104821594A (en) * | 2015-03-27 | 2015-08-05 | 国网上海市电力公司 | Transformation and distribution station connected with energy storage system |
| CN108695969A (en) * | 2018-06-08 | 2018-10-23 | 国家电网有限公司 | A kind of emergency power supply case and its operating method |
| CN111355240A (en) * | 2018-12-21 | 2020-06-30 | 西安许继电力电子技术有限公司 | Rail transit power distribution network system, power supply system and regenerated energy inverter circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113852062A (en) * | 2021-09-08 | 2021-12-28 | 中铁二院工程集团有限责任公司 | Rail transit power supply system based on three-phase inverter power supply device |
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Application publication date: 20210309 |
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