CN110912176A - High-reliability power supply method for converter valve controller - Google Patents
High-reliability power supply method for converter valve controller Download PDFInfo
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- CN110912176A CN110912176A CN201911251207.5A CN201911251207A CN110912176A CN 110912176 A CN110912176 A CN 110912176A CN 201911251207 A CN201911251207 A CN 201911251207A CN 110912176 A CN110912176 A CN 110912176A
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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
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
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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
- H02J9/061—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 DC powered loads
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
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- Business, Economics & Management (AREA)
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- Dc-Dc Converters (AREA)
Abstract
The invention provides a high-reliability power supply method for a converter valve controller, wherein a converter valve controller cabinet in each converter valve control panel cabinet is provided with a power supply module, the power supply module is independently arranged in a shell matched with the cabinet and consists of a plurality of modular power supplies, and the power, an internal circuit, the appearance size and an interface of each modular power supply are all the same. The module power supply can work normally under the condition that any one path of direct current power supply is electrified. The converter valve controller power supply system improves the power supply mode of the existing converter valve controller, provides a combinable modular power supply mode, solves the problems of poor power panel compatibility and complex production management caused by different power requirements of the converter valve controller, and improves the overall reliability of the power supply system through multi-power supply.
Description
Technical Field
The invention relates to a method in the field of flexible direct current transmission converter control, in particular to a high-reliability power supply method for a converter valve controller.
Background
The converter valve controller is a control center of the converter valve and is responsible for controlling and monitoring the working state of each power unit on the valve tower so as to meet the dispatching requirements of an upper converter and a station-level power system. In engineering application such as flexible direct current transmission, the converter is used as a core component, and the stability and reliability of the whole system are affected, so that the reliability of the working power supply of the converter controller is very important for the system and the engineering.
At present, converter valve controllers have different configurations according to different actual application fields and application projects, but a plurality of boards are inserted into a case in the form, and the case is placed in a cabinet body. The power supply of the board card and the chassis is shown in fig. 1. In order to ensure the power supply of the controller, double redundant power supplies are adopted, wherein the direct current screens A and B are the same, two paths of power supplies output by the direct current screens are respectively connected to power supply boards of a control cabinet in a screen cabinet, each path of power supply corresponds to one power supply board in the cabinet, for example, the direct current screen A corresponds to the power supply boards A11, A12 and A13-An 3, and the direct current screen B corresponds to B11, B12 and B13-Bn 3. Two power supplies are arranged in each case, are in a dual-redundancy hot backup mode, and jointly supply power to the power utilization board cards in the cases. The power panel usually has the functions of inputting and outputting power failure alarm, and has the capability of certain input power failure output delay power failure of dozens of ms.
The power supply form of the converter valve controller is widely applied to the current flexible and straight project, and the power supply in the dual-redundancy hot backup form provides powerful power supply support for valve control. However, due to different application occasions of the converter valve controllers, the types and the number of the matched board cards are greatly different, the power consumption difference of each case is also large, and under the condition that the power supply considers power, redundancy, heat dissipation, cost and the like, different power supplies can be used according to different items, so that the case power supply brings certain problems in the aspects of production management, product maintenance and compatibility.
In consideration of factors such as case space and the like, only one power panel in each case corresponds to one input power supply in a flexible direct current transmission project, if one direct current power supply fails, the controller operates in a single power supply mode, and if a single case power supply fails, the converter valve controller is wholly stopped and even out of control. In addition, because the energy storage of the power panel is limited, under the condition of input power failure, the output can be quickly powered down after tens of milliseconds, and the converter valve controller can be powered down without completing the power failure processing or reporting the power failure, so that certain potential hazards of out-of-control and data loss are brought.
Disclosure of Invention
In order to overcome the defects in the background art, the invention provides a high-reliability power supply method of a converter valve controller, which improves the power supply mode of the existing converter valve controller, provides a combinable modular power supply mode, solves the problems of poor compatibility of power panels and complex production management caused by different power requirements of the converter valve controller, and improves the overall reliability of a power supply system through multi-power supply.
In order to achieve the purpose, the invention adopts the following technical scheme:
a converter valve controller case in each converter valve control panel cabinet is provided with a power module, the power module is independently arranged in a shell matched with the case, the power module is composed of a plurality of modular power supplies, and the power, an internal circuit, the outline dimension and the interface of each modular power supply are all the same. The module power supply can work normally under the condition that any one path of direct current power supply is electrified.
The direct current supply panel comprises a direct current panel A and a direct current panel B, and the converter valve control panel cabinet comprises a first panel cabinet to an nth panel cabinet;
the power supply of the direct current screen A is connected to an air switch A1 after entering a first screen cabinet of the converter valve controller, and direct current is respectively supplied to a plurality of power supply modules of the first screen cabinet from the air switch A1 through diodes D11, D13 and D15; the power supply of the direct current screen B is connected into an air switch B1 after entering a first screen cabinet of the converter valve controller, and direct current is supplied to a plurality of power supply modules of the first screen cabinet from an air switch B1 through diodes D12, D14 and D16 respectively; similarly, the power supply of the direct current screen A is connected into An air switch An after entering a screen cabinet n of the converter valve controller, and direct current is respectively supplied to the multi-power module of the nth screen cabinet from the air switch An through diodes Dn1, Dn3 and Dn 5; the power supply of the direct current panel B is connected into an air switch Bn after entering an nth panel cabinet of the converter valve controller, and direct current is respectively supplied to a plurality of power supply modules of the nth panel cabinet from the air switch Bn through diodes Dn2, Dn4 and Dn 6; therefore, when any direct current power supply of the power module in the screen cabinet is electrified, the power module can work normally.
Furthermore, n identical module power sources cell1 and cell 2-cell are inserted into each power module, each cell module power source has fixed power, and the power modules can flexibly match with different numbers of module power sources according to different power consumptions of the motor cases; the number of module power supplies in the power module is determined by the power consumption of the converter valve controller case.
Furthermore, each module power supply is randomly inserted and connected on the power module backboard, and no fixed slot position is specified; in a power supply module, high-voltage direct current input by a direct current screen is respectively connected into module power supplies cell1 and cell 2-celln, each module power supply is provided with a quick-break fuse F fused in an overcurrent mode, and when the module power supply breaks down, the fuse F is fused and disconnected with the input power supply, so that other module power supplies cannot be influenced; the power supply after the fuse F is divided into two paths: one path of the current is sent to a traditional DC/DC direct current step-down power supply, the direct current of V2 is output, the power supply voltage of V2 is the same as that of a valve control equipment board card, and the partial current is converged into a power module backboard; and the other path is sent to a battery charging circuit, the battery charging circuit outputs a direct current voltage V1 matched with the power supply of the valve control equipment board card to charge the battery, V1 is equal to V2, the battery is connected in parallel with the output of the module power supply through a diode, and the voltage of the diode is Vd.
Further, the battery does not supply power to the valve control power equipment under normal conditions, and the battery starts to supply power to the equipment only when the voltage of the backboard of the power module is reduced to V2-Vd; therefore, when the input power is down, the output of the power supply module can continuously provide stable voltage, so that the converter valve controller finishes corresponding control protection actions, reports faults, waits for a command of station-level control and executes the command; the risks of abnormal shutdown of the converter valve, incomplete reporting of faults and the like caused by abnormal power supply of the direct-current screen can be effectively reduced.
Furthermore, each power module support and export multichannel power simultaneously, through the inside soft break-make circuit of MOSFET of power module, the power-on order of multichannel power can be adjusted, makes power module power supply application range extensive, only need set up can adapt to different power supply demands.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention provides a combinable modular power supply mode, which solves the problems of poor compatibility of a power panel and complex production management caused by different power requirements of converter valve controllers, and improves the overall reliability of a power supply system by multi-power supply;
2. the power module consists of a plurality of modular power supplies (cells), the power, the internal circuit, the external dimension, the interface and the like of each modular power supply are completely the same, the modular power supplies are powered by two paths of direct current power supplies, and the modular power supplies can normally work under the condition that any one path of direct current power supply is electrified;
3. the risks of abnormal shutdown of the converter valve, incomplete reporting of faults and the like caused by abnormal power supply of the direct-current screen can be effectively reduced;
4. the method is convenient to use in some projects needing load sequential starting.
Drawings
FIG. 1 is a schematic diagram of converter valve controller board card and chassis power supply of the present invention;
FIG. 2 is a schematic diagram of a converter valve controller high-reliability power supply mode of the invention;
FIG. 3 is a schematic diagram of a power module according to the present invention;
FIG. 4 is a timing diagram of the output voltage of the power module according to the present invention.
Detailed Description
The following detailed description of the present invention will be made with reference to the accompanying drawings.
A high-reliability power supply method for a converter valve controller is disclosed, as shown in figures 1-2, a combinable modular power supply can be called a power supply module, a converter valve controller case in each screen cabinet is provided with a power supply module, the power supply module is independently arranged in a shell matched with the case, the power supply module consists of a plurality of modular power supplies (cells), the power, an internal circuit, the outline dimension, an interface and the like of each modular power supply are completely the same and are supplied by two direct current power supplies, and the modular power supplies can normally work under the condition that any direct current power supply is electrified.
As shown in fig. 2, the power supply of the dc panel a is connected to the air switch a1 after entering the panel cabinet 1 of the converter valve controller, and the dc power is supplied to the power modules 11, 12, and 13 from the air switch a1 through the diodes D11, D13, and D15, respectively; the direct current panel B supplies power to the panel cabinet 1 of the converter valve controller, and then the direct current panel B is connected to the air switch B1, and direct current is supplied to the power modules 11, 12 and 13 from the air switch B1 through the diodes D12, D14 and D16. Similarly, the power supply of the direct current panel A is connected to An air switch An after entering a panel cabinet n of the converter valve controller, and direct current is supplied to power supply modules n1, n2 and n3 from the air switch An through diodes Dn1, Dn3 and Dn5 respectively; the direct current panel B supplies power to the panel cabinet n1 of the converter valve controller and then is connected to the air switch Bn, and direct current is supplied to the power supply modules n1, n2 and n3 from the air switch Bn through the diodes Dn2, Dn4 and Dn 6. Therefore, when any direct current power supply of the power module in the screen cabinet is electrified, the power module can work normally. And according to the number of the chassis of the actual engineering, the number of the corresponding power modules is matched.
The power supply modules 11, 12, 13, n1, n2 and n3 are all inserted with identical module power supplies cell1 and cell 2-cell, each cell module power supply has fixed power, and the power supply modules can flexibly support different numbers of module power supplies according to different power consumptions of the motor cases. The number of the module power supplies in the power supply module is determined by the power consumption of the case of the converter valve controller, generally, the power consumption of the converter valve controller is added with at least one time of redundancy, so that the configuration can ensure that the converter valve controller can normally work when half or even more than half of the module power supplies in the power supply module have faults, and the power supply reliability is effectively improved.
The module power supply can be randomly inserted and connected on the power module backboard without fixed slot position regulation. As shown in fig. 3, in a power module, high-voltage direct current input by a direct current screen is respectively connected to module power sources cell1 and cell 2-celln, each module power source has a quick-break fuse F blown out by overcurrent, when the module power source fails, the fuse F is blown out, and is disconnected from the input power source, so that other module power sources are not affected. The power supply after the fuse F is divided into two paths: one path of the current is sent to a traditional DC/DC direct current step-down power supply, the direct current of V2 is output, the power supply voltage of V2 is the same as that of a valve control equipment board card, and the partial current is converged into a power module backboard; and the other path is sent to a battery charging circuit, the battery charging circuit outputs a direct current voltage V1 matched with the power supply of the valve control equipment board card to charge the battery, V1 is equal to V2, the battery is connected in parallel with the output of the module power supply through a diode, and the voltage of the diode is Vd.
Under normal conditions, the battery does not supply power to the valve control power equipment, and the battery starts to supply power to the equipment only when the voltage of the power module backboard is reduced to V2-Vd. Therefore, when the input power is down, the output of the power supply module can continuously provide stable voltage, so that the converter valve controller finishes corresponding control protection actions, reports faults, and waits for and executes the command of station-level control. The risks of abnormal shutdown of the converter valve, incomplete reporting of faults and the like caused by abnormal power supply of the direct-current screen can be effectively reduced.
The power module supports the simultaneous output of multiple power supplies, and the sequence of the multiple power supplies can be randomly adjusted through the MOSFET soft on-off circuit in the power module, so that the power module is wide in power supply application range, and can adapt to different power supply requirements only by setting. As shown in fig. 4, which is a timing diagram of the output voltage of the power module, the first power supply, the second power supply, and the third power supply may be powered on simultaneously or separately, and the output time interval T1 and T2 of each power supply may be adjustable from-100 ms to 100 ms. The method is convenient to use in some projects needing load sequential starting.
The above embodiments are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are given, but the scope of the present invention is not limited to the above embodiments. The methods used in the above examples are conventional methods unless otherwise specified.
Claims (6)
1. A high-reliability power supply method for a converter valve controller is characterized in that a converter valve controller cabinet in each converter valve control panel cabinet is provided with a power supply module, the power supply module is independently arranged in a shell matched with the cabinet and consists of a plurality of modular power supplies, the power, an internal circuit, the outline dimension and an interface of each modular power supply are all the same, the modular power supplies are supplied by two paths of direct current power supplies, and the modular power supplies can normally work under the condition that any one path of direct current power supply is electrified.
2. The high-reliability power supply method for the converter valve controller according to claim 1, wherein the direct current power supply panel comprises a direct current panel A and a direct current panel B, and the converter valve control cabinet comprises a first cabinet to an nth cabinet;
the power supply of the direct current screen A is connected to an air switch A1 after entering a first screen cabinet of the converter valve controller, and direct current is respectively supplied to a plurality of power supply modules of the first screen cabinet from the air switch A1 through diodes D11, D13 and D15; the power supply of the direct current screen B is connected into an air switch B1 after entering a first screen cabinet of the converter valve controller, and direct current is supplied to a plurality of power supply modules of the first screen cabinet from an air switch B1 through diodes D12, D14 and D16 respectively; similarly, the power supply of the direct current screen A is connected into An air switch An after entering a screen cabinet n of the converter valve controller, and direct current is respectively supplied to the multi-power module of the nth screen cabinet from the air switch An through diodes Dn1, Dn3 and Dn 5; the power supply of the direct current panel B is connected into an air switch Bn after entering an nth panel cabinet of the converter valve controller, and direct current is respectively supplied to a plurality of power supply modules of the nth panel cabinet from the air switch Bn through diodes Dn2, Dn4 and Dn 6; therefore, when any direct current power supply of the power module in the screen cabinet is electrified, the power module can work normally.
3. The high-reliability power supply method for the converter valve controller according to claim 2, wherein n identical module power sources cells 1, 2-celln are inserted into each power source module, each cell module power source has fixed power, and the power source modules can flexibly support different numbers of module power sources according to different power consumptions of the power utilization cases; the number of module power supplies in the power module is determined by the power consumption of the converter valve controller case.
4. The method for supplying power to the converter valve controller with high reliability as claimed in claim 3, wherein each module power supply is freely inserted into a power module backboard without a fixed slot specification; in a power supply module, high-voltage direct current input by a direct current screen is respectively connected into module power supplies cell1 and cell 2-celln, each module power supply is provided with a quick-break fuse F fused in an overcurrent mode, and when the module power supply breaks down, the fuse F is fused and disconnected with the input power supply, so that other module power supplies cannot be influenced; the power supply after the fuse F is divided into two paths: one path of the current is sent to a traditional DC/DC direct current step-down power supply, the direct current of V2 is output, the power supply voltage of V2 is the same as that of a valve control equipment board card, and the partial current is converged into a power module backboard; and the other path is sent to a battery charging circuit, the battery charging circuit outputs a direct current voltage V1 matched with the power supply of the valve control equipment board card to charge the battery, V1 is equal to V2, the battery is connected in parallel with the output of the module power supply through a diode, and the voltage of the diode is Vd.
5. The method of claim 4, wherein the battery does not normally supply power to the valve control power equipment, and the battery starts to supply power to the equipment only when the voltage of the power module backplane drops to V2-Vd; therefore, when the input power is down, the output of the power supply module can continuously provide stable voltage, so that the converter valve controller finishes corresponding control protection actions, reports faults, waits for a command of station-level control and executes the command; the risks of abnormal shutdown of the converter valve, incomplete reporting of faults and the like caused by abnormal power supply of the direct-current screen can be effectively reduced.
6. The high-reliability power supply method for the converter valve controller according to claim 4, wherein each power module supports simultaneous output of multiple power supplies, and the power-on sequence of the multiple power supplies can be adjusted through a MOSFET soft switching-off circuit inside the power module, so that the power supply of the power modules has a wide application range, and can be adapted to different power supply requirements only by setting.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911251207.5A CN110912176A (en) | 2019-12-09 | 2019-12-09 | High-reliability power supply method for converter valve controller |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911251207.5A CN110912176A (en) | 2019-12-09 | 2019-12-09 | High-reliability power supply method for converter valve controller |
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| CN110912176A true CN110912176A (en) | 2020-03-24 |
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| CN201911251207.5A Pending CN110912176A (en) | 2019-12-09 | 2019-12-09 | High-reliability power supply method for converter valve controller |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113315110A (en) * | 2021-07-29 | 2021-08-27 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | DC power supply circuit |
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| CN109412255A (en) * | 2018-10-22 | 2019-03-01 | 宁波三星智能电气有限公司 | A kind of double loop power supply switching circuit of low-loss high reliability |
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| JP3164484U (en) * | 2009-12-31 | 2010-12-02 | 瑞傳科技股▲分▼有限公司 | Redundant power supply |
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Address after: 510620 No. 116 Tianhe Road, Guangzhou, Guangdong, Tianhe District Applicant after: CSG EHV POWER TRANSMISSION Co. Applicant after: Rongxin Huike Electric Co.,Ltd. Address before: 510620 No. 116 Tianhe Road, Guangzhou, Guangdong, Tianhe District Applicant before: CSG EHV POWER TRANSMISSION Co. Applicant before: RONGXIN HUIKE ELECTRIC TECHNOLOGY Co.,Ltd. |