CN114123788A - Flexible direct-current transmission converter valve submodule redundancy energy-taking device and control method thereof - Google Patents
Flexible direct-current transmission converter valve submodule redundancy energy-taking device and control method thereof Download PDFInfo
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- CN114123788A CN114123788A CN202111341868.4A CN202111341868A CN114123788A CN 114123788 A CN114123788 A CN 114123788A CN 202111341868 A CN202111341868 A CN 202111341868A CN 114123788 A CN114123788 A CN 114123788A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
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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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- 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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- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention relates to a flexible direct-current transmission converter valve submodule redundancy energy-taking device and a control method thereof, wherein the device comprises a secondary Side Regulation Flyback switching power supply (SSR-Flyback), a Primary Side Regulation Flyback switching power supply (Primary-Side Regulation Flyback, which is called PSR-Flyback for short below) module and a power supply management module; the SSR-flyback module obtains electricity from a power sub-module capacitor and generates direct-current output voltage in a primary current and secondary voltage feedback mode; the PSR-flyback module obtains electricity from a power sub-module capacitor and generates direct-current output voltage in a primary side current and primary side voltage feedback mode; and the voltage generated by the SSR-flyback module and the voltage generated by the PSR-flyback module are output by the PM power management module and are provided to the submodule control unit for use. The energy taking device provided by the invention can replace a dual-power direct redundancy scheme, realizes the compact design of the device, improves the anti-interference capability of the energy taking device, can meet the requirement of high output precision, has the advantages of long service life and low failure rate, and well solves the problems of short service life and high failure rate of the existing energy taking device of a control unit.
Description
Technical Field
The invention relates to the technical field of flexible high-voltage direct-current transmission, in particular to a flexible direct-current transmission converter valve submodule redundancy energy-taking device and a control method thereof.
Background
The energy taking device is a key device in a power sub-module of the flexible direct current transmission converter valve, and the requirements of high output precision and low failure rate are met for the energy taking device in the running process of the flexible direct current transmission converter valve. The output of the energy taking device is unstable or the failure rate is high, the redundancy number of the power sub-modules of the flexible direct current transmission converter valve can be reduced, and the system can be tripped and shut down seriously. In the prior art, when an energy taking device is designed, a manufacturer of a flexible direct current transmission converter valve generally adopts a mode of adjusting a Flyback switching power supply (SSR-Flyback, hereinafter referred to as SSR-Flyback) power supply or a dual SSR-Flyback power supply on a single Side and a Secondary Side. The SSR-flyback voltage output precision is high, but the SSR-flyback voltage output precision has the defects of short service life and high failure rate of a voltage feedback optocoupler.
Disclosure of Invention
Based on the above situation in the prior art, the invention aims to provide a flexible direct-current transmission converter valve sub-module redundant energy-taking device and a control method thereof, so as to solve the problems of short service life and high failure rate of the existing control unit energy-taking device.
In order to achieve the above object, according to one aspect of the present invention, a flexible dc power transmission converter valve submodule redundancy energy-taking device is provided, which includes a first switching power supply module, a second switching power supply module, and a power management module; wherein the content of the first and second substances,
the first switching power supply module and the second switching power supply module are both connected with a flexible direct current power transmission converter valve sub-module capacitor and are used for getting electricity from the capacitor and generating direct current output voltage;
the power management module is respectively connected with the first switch power supply module and the second switch power supply module and used for controlling the generated direct current output voltage and providing the direct current output voltage to the control unit of the sub-module for power supply.
Further, the first switching power supply module comprises a secondary side regulation flyback switching power supply;
the secondary side regulation flyback switching power supply comprises a first switch M1, wherein the first switch M1 is switched on and off at a high frequency so as to generate a direct current output voltage by using the capacitor voltage.
Further, the first switching power supply module further includes a first input diode, a first transformer, and a first output diode;
the first input diode, the primary side of the first transformer and the first switch M1 are connected in series at two ends of the capacitor.
Further, the second switching power supply module comprises a primary side regulation flyback switching power supply;
the primary side regulation flyback switching power supply comprises a second switch M2, wherein the first switch M2 is switched on and off at a high frequency so as to generate a direct current output voltage by using the capacitor voltage.
Further, the second switching power supply module further includes a second input diode, a second transformer, and a second output diode;
the second input diode, the primary side of the second transformer and the second switch M2 are connected in series at two ends of the capacitor.
Further, the power management module comprises a first switching power supply module output monitoring circuit and a second switching power supply module output monitoring circuit;
the first switching power supply module output monitoring loop is connected with the output of the first switching power supply module so as to monitor the direct current output voltage output by the first switching power supply module;
the second switching power supply module output monitoring loop is connected with the output of the second switching power supply module so as to monitor the direct current output voltage output by the second switching power supply module.
Further, the power management module further includes a third switch M3 and a fourth switch M4;
the third switch M3 is connected with the output of the first switch power supply module, and controls the output of the direct current output voltage generated by the first switch power supply module according to the monitoring result of the first switch power supply module output monitoring loop;
and the fourth switch M4 is connected with the output of the second switching power supply module, and controls the output of the direct-current output voltage generated by the second switching power supply module according to the monitoring result of the output monitoring loop of the second switching power supply module.
According to a second aspect of the invention, there is provided a control method for the flexible direct current transmission converter valve sub-module redundant energy-taking device according to the first aspect of the invention, comprising:
when the voltage on the sub-module capacitor is charged to be larger than the starting voltage, controlling the first switch M1 and the second switch M2 to be switched on and off at high frequency, so that the first switching power supply module and the second switching power supply module generate direct-current output voltage;
controlling the power management module to sample direct current output voltage anodes of the first switching power supply module and the second switching power supply module, and respectively generating a first control signal and a second control signal according to the sampled voltages;
and controlling the third switch M3 and the fourth switch M4 to be switched on and off according to the first control signal and the second control signal so as to control the output direct current output voltage.
Further, the controlling the third switch M3 and the fourth switch M4 to be turned on or off according to the first control signal and the second control signal to control the output dc output voltage includes:
when the first control signal is invalid, controlling the third switch M3 to be turned on, and controlling the fourth switch M4 to be turned off, and outputting the direct-current output voltage from the first switching power supply module;
when the first control signal is valid and the second control signal is invalid, the third switch M3 is controlled to be turned off, the fourth switch M4 is controlled to be turned on, and the direct-current output voltage is output from the second switching power supply module.
Further, the method for controlling the on/off of the third switch M3 and the fourth switch M4 according to the first control signal and the second control signal to control the output dc output voltage further includes:
when the first control signal is invalid and the second control signal is invalid, the third switch M3 is controlled to be closed, and the fourth switch M4 is controlled to be closed.
In summary, the present invention provides a flexible direct current transmission converter valve submodule redundancy energy-obtaining device and a control method thereof, the device includes a secondary Side Regulation Flyback switching power supply (SSR-Flyback), a Primary Side Regulation Flyback switching power supply (Primary-Side Regulation Flyback, hereinafter referred to as PSR-Flyback) module and a power management module; the SSR-flyback module obtains electricity from a power sub-module capacitor and generates direct-current output voltage in a primary current and secondary voltage feedback mode; the PSR-flyback module obtains electricity from a power sub-module capacitor and generates direct-current output voltage in a primary side current and primary side voltage feedback mode; and the voltage generated by the SSR-flyback module and the voltage generated by the PSR-flyback module are output by the PM power management module and are provided to the submodule control unit for use. The energy taking device provided by the invention can replace a dual-power direct redundancy scheme, realizes the compact design of the device, improves the anti-interference capability of the energy taking device, can meet the requirement of high output precision, has the advantages of long service life and low failure rate, and well solves the problems of short service life and high failure rate of the existing energy taking device of a control unit.
Drawings
FIG. 1 is a schematic circuit diagram of a flexible direct-current transmission converter valve sub-module redundant energy-taking device according to an embodiment of the invention;
fig. 2 is a flowchart of a control method of a flexible direct-current transmission converter valve sub-module redundant energy-taking device according to an embodiment of the invention.
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 one embodiment of the invention, a flexible direct-current power transmission converter valve submodule redundant energy-taking device is provided, a circuit schematic diagram of the energy-taking device is shown in fig. 1, and the energy-taking device comprises a first switching power supply module, a second switching power supply module and a power supply management module. The first switching power supply module and the second switching power supply module are both connected with a capacitor C of a flexible direct current power transmission converter valve submodule and used for getting electricity from the capacitor C and generating direct current output voltage; and the power supply management module is respectively connected with the first switching power supply module and the second switching power supply module and is used for controlling the generated direct current output voltage and supplying the direct current output voltage to the control unit of the submodule for power supply.
The first switching power supply module comprises a secondary side regulation flyback switching power supply (SSR-flyback); the secondary side regulation flyback switching power supply comprises a first switch M1, wherein the first switch M1 is switched on and off at a high frequency, and the direct current output voltage is generated by taking electricity from a sub-module capacitor C in a primary side current and secondary side voltage feedback mode. The first switching power supply module further comprises a first input diode Din1, a first transformer T1, a first output diode Dout1 and a first control chip U1; a first input diode Din1, the primary side of the first transformer T1 and the first switch M1 are connected in series across the capacitor. In order to control the voltage output precision, the SSR-flyback module further comprises a primary side current sampling loop Im1 and a secondary side voltage sampling optocoupler UO 1.
The second switching power supply module comprises a primary side regulation flyback switching power supply (PSR-flyback); the primary side regulation flyback switching power supply comprises a second switch M2, wherein the first switch M2 is switched on and off at a high frequency, power is taken from a sub-module capacitor C, and a direct current output voltage is generated in a primary side current and primary side voltage feedback mode. The second switching power supply module further includes a second input diode Din2, a second transformer T2, and a second output diode Dout 2; a second input diode Din2, the primary side of a second transformer T2 and a second switch M2 are connected in series across the capacitor. In order to meet the requirements of long service life and low failure rate, the PSR-flyback module comprises a primary current sampling loop Im2 and a primary voltage sampling winding Vm 2.
The SSR-flyback module and the PSR-flyback module generate voltages which are controlled by the power management module to be output and provided to the submodule control unit for use. The power management module includes a first switching power supply module output monitoring loop VmS and a second switching power supply module output monitoring loop VmP, and a third control chip U3; the first switching power supply module output monitoring loop is connected with the output of the first switching power supply module so as to monitor the direct current output voltage output by the first switching power supply module; the second switching power supply module output monitoring loop is connected with the output of the second switching power supply module so as to monitor the direct current output voltage output by the second switching power supply module. The power management module further comprises a third switch M3 and a fourth switch M4; the third switch M3 is connected with the output of the first switch power supply module and controls the output of the direct current output voltage generated by the first switch power supply module according to the monitoring result of the output monitoring loop of the first switch power supply module; and the fourth switch M4 is connected with the output of the second switching power supply module, and controls the output of the direct-current output voltage generated by the second switching power supply module according to the monitoring result of the output monitoring loop of the second switching power supply module. The power management module may further comprise an SSR-flyback ALARM output loop SSR-ALARM to output a first control signal and a PSR-flyback ALARM output loop PSR-ALARM to output a second control signal.
The specific connection of the circuit of the device can adopt the following modes: the positive electrode of the sub-module capacitor C is connected with the anodes of the first and second input diodes Din1 and Din2 of the SSR-flyback module and the PSR-flyback module; the negative electrode of the capacitor C is connected with S electrodes of first and second switching devices M1 and M2 of the SSR-flyback module and the PSR-flyback module; the output negative electrode of the SSR-flyback module is internally connected with the output negative electrode of the PSR-flyback module; the output negative electrode of the PSR-flyback module is connected with the output negative electrode OUT of the PM module; the output positive electrode of the SSR-flyback module is connected with the D electrode of the third switch M3; the positive output electrode of the PSR-flyback module is connected with the D electrode of the fourth switch M4; the S pole of the third switch M3 is connected with the S pole of the fourth switch M4; the S pole of the fourth switch M4 is connected with the output anode OUT + of the power management module; the output positive electrodes of the SSR-flyback module and the PSR-flyback module are connected with a third control chip U3 in a sampling mode; the SSR-flyback power supply monitoring output of the third control chip U3 is connected with the monitoring output SSR-ALARM of the power supply management module; the PSR-flyback power supply monitoring output of the third control chip U3 is connected with the monitoring output PSR-ALARM of the power management module.
According to a second embodiment of the invention, there is provided a control method of the flexible direct current transmission converter valve sub-module redundant energy-taking device according to the first aspect of the invention, the flow chart of the control method is shown in fig. 2, and the control method includes the following steps:
when the voltage on the sub-module capacitor is charged to be larger than the starting voltage, controlling the first switch M1 and the second switch M2 to be switched on and off at high frequency, so that the first switching power supply module and the second switching power supply module generate direct-current output voltage;
controlling the power management module to sample direct current output voltage anodes of the first switching power supply module and the second switching power supply module, and respectively generating a first control signal and a second control signal according to the sampled voltages;
the third switch M3 and the fourth switch M4 are controlled to be switched on and off according to a first control signal and a second control signal so as to control the output direct current output voltage:
when the first control signal is invalid, controlling the third switch M3 to be turned on, and controlling the fourth switch M4 to be turned off, and outputting the direct-current output voltage from the first switching power supply module;
when the first control signal is valid and the second control signal is invalid, the third switch M3 is controlled to be turned off, the fourth switch M4 is controlled to be turned on, and the direct-current output voltage is output from the second switching power supply module.
When the first control signal is invalid and the second control signal is invalid, the third switch M3 is controlled to be closed, and the fourth switch M4 is controlled to be closed.
That is to say, the specific working principle of the flexible direct-current transmission converter valve submodule redundancy energy-taking device applied to the power submodule control unit energy-taking in the embodiment of the invention is as follows:
when the sub-module capacitor C is charged, when the voltage of the capacitor C is greater than the start voltage, the first control chip U1 and the second control chip U2 respectively control the first switch M1 and the second switch M2 to be switched on at high frequency, so that the SSR-flyback module and the PSR-flyback module respectively output direct-current voltages. The third control chip U3 respectively generates SSR-ALARM and PSR-ALARM signals according to the level of the sampled voltage by sampling the direct-current voltage positive electrodes output by the SSR-flyback module and the PSR-flyback module. When the SSR-ALARM is invalid, the third control chip U3 controls the third switch M3 to be turned on and the fourth switch M4 to be turned off; when the SSR-ALARM is effective and the PSR-ALARM is ineffective, the third control chip U3 controls the third switch M3 to be closed and the fourth switch M4 to be switched on; when the SSR-ALARM is invalid and the PSR-ALARM is invalid, the third control chip U3 controls the third switch M3 to be closed and the fourth switch M4 to be closed.
In summary, the present invention relates to a flexible direct current transmission converter valve submodule redundancy energy-obtaining device and a control method thereof, the device includes a secondary Side Regulation Flyback switching power supply (SSR-Flyback), a Primary Side Regulation Flyback switching power supply (Primary-Side Regulation Flyback, hereinafter referred to as PSR-Flyback) module and a power management module; the SSR-flyback module obtains electricity from a power sub-module capacitor and generates direct-current output voltage in a primary current and secondary voltage feedback mode; the PSR-flyback module obtains electricity from a power sub-module capacitor and generates direct-current output voltage in a primary side current and primary side voltage feedback mode; and the voltage generated by the SSR-flyback module and the voltage generated by the PSR-flyback module are output by the PM power management module and are provided to the submodule control unit for use. The energy taking device provided by the invention can replace a dual-power direct redundancy scheme, realizes the compact design of the device, improves the anti-interference capability of the energy taking device, can meet the requirement of high output precision, has the advantages of long service life and low failure rate, and well solves the problems of short service life and high failure rate of the existing energy taking device of a control unit.
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 (10)
1. The flexible direct-current transmission converter valve submodule redundancy energy obtaining device is characterized by comprising a first switching power supply module, a second switching power supply module and a power supply management module; wherein the content of the first and second substances,
the first switching power supply module and the second switching power supply module are both connected with a flexible direct current power transmission converter valve sub-module capacitor and are used for getting electricity from the capacitor and generating direct current output voltage;
the power management module is respectively connected with the first switch power supply module and the second switch power supply module and used for controlling the generated direct current output voltage and providing the direct current output voltage to the control unit of the sub-module for power supply.
2. The apparatus of claim 1, wherein the first switching power module comprises a secondary-side regulated flyback switching power supply;
the secondary side regulation flyback switching power supply comprises a first switch M1, wherein the first switch M1 is switched on and off at a high frequency so as to generate a direct current output voltage by using the capacitor voltage.
3. The apparatus of claim 2, wherein the first switching power supply module further comprises a first input diode, a first transformer, and a first output diode;
the first input diode, the primary side of the first transformer and the first switch M1 are connected in series at two ends of the capacitor.
4. The apparatus of claim 1, wherein the second switching power module comprises a primary-side regulated flyback switching power supply;
the primary side regulation flyback switching power supply comprises a second switch M2, wherein the first switch M2 is switched on and off at a high frequency so as to generate a direct current output voltage by using the capacitor voltage.
5. The apparatus of claim 4, wherein the second switching power supply module further comprises a second input diode, a second transformer, and a second output diode;
the second input diode, the primary side of the second transformer and the second switch M2 are connected in series at two ends of the capacitor.
6. The apparatus of claim 3 or 5, wherein the power management module comprises a first switching power supply module output monitoring loop and a second switching power supply module output monitoring loop;
the first switching power supply module output monitoring loop is connected with the output of the first switching power supply module so as to monitor the direct current output voltage output by the first switching power supply module;
the second switching power supply module output monitoring loop is connected with the output of the second switching power supply module so as to monitor the direct current output voltage output by the second switching power supply module.
7. The apparatus of claim 6, wherein the power management module further comprises a third switch M3 and a fourth switch M4;
the third switch M3 is connected with the output of the first switch power supply module, and controls the output of the direct current output voltage generated by the first switch power supply module according to the monitoring result of the first switch power supply module output monitoring loop;
and the fourth switch M4 is connected with the output of the second switching power supply module, and controls the output of the direct-current output voltage generated by the second switching power supply module according to the monitoring result of the output monitoring loop of the second switching power supply module.
8. A control method of the flexible direct current transmission converter valve sub-module redundant energy-taking device according to any one of claims 1 to 7, characterized by comprising the following steps:
when the voltage on the sub-module capacitor is charged to be larger than the starting voltage, controlling the first switch M1 and the second switch M2 to be switched on and off at high frequency, so that the first switching power supply module and the second switching power supply module generate direct-current output voltage;
controlling the power management module to sample direct current output voltage anodes of the first switching power supply module and the second switching power supply module, and respectively generating a first control signal and a second control signal according to the sampled voltages;
and controlling the third switch M3 and the fourth switch M4 to be switched on and off according to the first control signal and the second control signal so as to control the output direct current output voltage.
9. The method of claim 8, wherein controlling the third switch M3 and the fourth switch M4 to be turned on and off according to a first control signal and a second control signal to control the output DC output voltage comprises:
when the first control signal is invalid, controlling the third switch M3 to be turned on, and controlling the fourth switch M4 to be turned off, and outputting the direct-current output voltage from the first switching power supply module;
when the first control signal is valid and the second control signal is invalid, the third switch M3 is controlled to be turned off, the fourth switch M4 is controlled to be turned on, and the direct-current output voltage is output from the second switching power supply module.
10. The method of claim 9, wherein controlling the third switch M3 and the fourth switch M4 to be turned on and off according to the first control signal and the second control signal to control the output dc output voltage further comprises:
when the first control signal is invalid and the second control signal is invalid, the third switch M3 is controlled to be closed, and the fourth switch M4 is controlled to be closed.
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| CN105576953A (en) * | 2016-01-04 | 2016-05-11 | 许继电气股份有限公司 | Modular multilevel converter (MMC) flexible DC converter valve and submodule power taking circuit thereof |
| CN206759147U (en) * | 2017-03-23 | 2017-12-15 | 广州视源电子科技股份有限公司 | Power supply switching circuit and power supply circuit |
| CN209626665U (en) * | 2019-05-06 | 2019-11-12 | 广州市新舞台灯光设备有限公司 | Stage Equipment Control system and stage powering shelf |
| CN112366931A (en) * | 2020-11-19 | 2021-02-12 | 中国南方电网有限责任公司超高压输电公司 | Flexible direct-current transmission converter valve fault power module multiple bypass protection method |
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