CN113760028A - Energy taking power supply and energy taking method of flexible and straight submodule - Google Patents
Energy taking power supply and energy taking method of flexible and straight submodule Download PDFInfo
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- CN113760028A CN113760028A CN202110814412.9A CN202110814412A CN113760028A CN 113760028 A CN113760028 A CN 113760028A CN 202110814412 A CN202110814412 A CN 202110814412A CN 113760028 A CN113760028 A CN 113760028A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
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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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- Automation & Control Theory (AREA)
- Direct Current Feeding And Distribution (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention relates to an energy-taking power supply and an energy-taking method of a flexible-straight submodule, wherein the energy-taking power supply comprises n current-limiting resistors, n-1 high-voltage relays and a voltage stabilizing circuit; the n current-limiting resistors form n parallel current-limiting circuits, wherein n-1 current-limiting resistors are respectively connected in series with the normally closed switch of the high-voltage relay; after the n parallel current limiting circuits are connected with the voltage stabilizing circuit in series, the n parallel current limiting circuits are connected to two ends of a capacitor of the flexible-straight submodule in parallel to obtain energy; the load board card controls the on-off of the n-1 high-voltage relays based on the voltage output by the voltage stabilizing circuit and adjusts the voltage output by the voltage stabilizing circuit. The energy-taking power supply has the advantages of simple structure, simple control, no need of a special control chip and high reliability. And the energy-taking power supply fault point is reduced without excessive electronic components. When the switch tube is in open-circuit fault, the stability of the output voltage can still be realized.
Description
Technical Field
The invention relates to the technical field of direct current transmission, in particular to an energy taking power supply and an energy taking method for a flexible-direct sub module.
Background
The flexible direct current transmission converter valve is used as core equipment for electric energy conversion and is composed of a plurality of valve towers, each valve tower is divided into a plurality of layers, and each layer is provided with dozens of submodules, namely: hundreds of sub-modules make up the entire converter valve. Each converter valve is designed with a plurality of even dozens of redundant sub-modules, when the sub-module faults are removed, the normal operation of the converter valve is ensured by the input of the redundant modules, but the sub-modules have excessive faults, and when the sub-module redundancy number is exceeded, the converter valve equipment can trip to influence the whole power supply system, so the normal operation of the sub-modules is very important.
The reliability of power supply can not be left in the normal operating of submodule piece, and at present, gentle straight submodule piece all disposes and gets can the power, but the power that gets that uses has a great deal of components and parts to constitute usually, and the abnormal work of arbitrary device can all influence the normal operating that gets can the power, causes submodule piece power supply anomaly, and consequently, the reliability that submodule piece got can the power needs to improve urgently.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides an energy-taking power supply and an energy-taking method for a flexible-straight submodule, wherein an energy-taking power supply circuit is simple in structure and control and does not need too many electronic components, and the reliability of the energy-taking power supply of the submodule is improved while the economy of the energy-taking power supply is improved.
In order to achieve the purpose, the invention provides an energy-taking power supply of a flexible-direct submodule, which comprises n current-limiting resistors, n-1 high-voltage relays and a voltage stabilizing circuit, wherein the n current-limiting resistors are connected with n output terminals of the flexible-direct submodule;
the n current-limiting resistors form n parallel current-limiting circuits R1 to Rn, wherein n-1 current-limiting resistors are respectively connected in series with a normally closed switch of the high-voltage relay;
after the n parallel current limiting circuits are connected with the voltage stabilizing circuit in series, the n parallel current limiting circuits are connected to two ends of a capacitor of the flexible-straight submodule in parallel to obtain energy;
the load board card controls the on-off of the n-1 high-voltage relays based on the voltage output by the voltage stabilizing circuit and adjusts the voltage output by the voltage stabilizing circuit.
Furthermore, n current-limiting resistors are sequentially increased in resistance from R1 to Rn, and R1 to Rn-1 are respectively connected in series with normally closed switches K1 to Kn-1 of the high-voltage relay.
Further, the voltage stabilizing circuit comprises a switch tube, a voltage stabilizing tube and a series resistor; the switch tube is connected between the current limiting circuit and the negative electrode of the capacitor of the flexible-direct sub-module, the voltage stabilizing tube is connected with the series resistor in series and then connected with the switch tube in parallel, and the control end of the switch tube is connected with the series connection end of the voltage stabilizing tube and the series resistor; the two ends of the switching tube output voltage.
Further, when the switch tube fails, voltage is output through the voltage regulator tube and the series resistor.
Furthermore, the withstand voltage value of the switch tube is larger than the voltage stabilizing value of the voltage stabilizing tube.
Further, n is an integer, and n is not less than 3.
In another aspect, there is provided a method for obtaining energy from an energy obtaining power supply of a flexible-direct sub-module as claimed in, wherein after the flexible-direct sub-module is powered on, a capacitor starts to charge, and as the capacitor of the flexible-direct sub-module rises, the voltage stabilizing circuit is turned on, and the energy obtaining power supply starts to output voltage; raising of capacitance to Vset for Flex-direct submoduleiWhen the load board card is used, the normally closed switch of the high-voltage relay connected with the ith current-limiting resistor in series is switched off; wherein Vset1<Vset2<…Vseti…<Vsetn-1；
As the capacitor voltage of the flexible-straight submodule decreases, it decreases to ViWhen the load board card is connected with the normally closed switch of the high-voltage relay connected with the ith current-limiting resistor in series; v1<V2<…Vi…<Vn-1(ii) a When the voltage of the capacitor of the flexible-straight submodule drops to the voltage stabilizing value of the voltage stabilizing tube, the switch tube is switched off, and the voltage is stabilized by the voltage stabilizing tube; and as the voltage of the capacitor is further reduced, the stable voltage of the voltage regulator tube is also reduced.
Further, Vi＝Vseti。
The technical scheme of the invention has the following beneficial technical effects:
(1) the energy taking power supply is simple in structure and control, does not need to be provided with a special control chip, and is high in reliability.
(2) The energy-taking power supply does not need too many electronic components, and the failure points of the energy-taking power supply are reduced.
(3) The energy-taking power supply can still realize the stability of output voltage when the switching tube is in open circuit failure.
Drawings
Fig. 1 is a schematic diagram of the sub-module bypass switch driving of the present invention, which is illustrated by a half-bridge sub-module.
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.
Fig. 1 is a schematic diagram of an energy-obtaining power supply of a flexible-direct submodule according to the present invention. As shown in fig. 1, the soft and straight submodule energy-taking power supply is connected in parallel with two ends of a capacitor C0, and energy is taken from two ends of the capacitor. The energy-taking power supply of the flexible-direct submodule is characterized by comprising n current-limiting resistors, n-1 high-voltage relays and a voltage stabilizing circuit;
the n current-limiting resistors form n multi-stage current-limiting circuits R1-Rn connected in parallel, wherein n-1 current-limiting resistors are respectively connected in series with the normally closed switches K1-Kn-1 of the high-voltage relay. Furthermore, n current-limiting resistors are sequentially increased in resistance from R1 to Rn, and R1 to Rn-1 are respectively connected in series with normally closed switches K1 to Kn-1 of the high-voltage relay.
After the n parallel current limiting circuits are connected with the voltage stabilizing circuit in series, the n parallel current limiting circuits are connected to two ends of a capacitor C0 of the flexible-direct submodule in parallel to obtain energy.
The load board card controls the on-off of the n-1 high-voltage relays based on the voltage output by the voltage stabilizing circuit and adjusts the voltage output by the voltage stabilizing circuit.
The voltage stabilizing circuit comprises a switch tube T1, a voltage stabilizing tube Z1 and a series resistor RL; the switch tube T1 is connected between a current-limiting circuit and the negative electrode of a capacitor C0 of the flexible-direct sub-module, the voltage-stabilizing tube is connected with the series resistor in series and then connected with the switch tube in parallel, and the control end of the switch tube T1 is connected with the series connection end of the voltage-stabilizing tube Z1 and the series resistor RL; the two ends of the switching tube T1 output voltage.
Further, when the switch tube fails, voltage is output through the voltage regulator tube and the series resistor.
On the other hand, the method for taking the energy of the energy taking power supply of the flexible and straight submodule is provided:
after the flexible and straight sub-module is electrified, the capacitor starts to charge along with the flexible and straight sub-moduleWhen the capacitor rises, the voltage stabilizing circuit is conducted, and the energy taking power supply starts to output voltage; raising of capacitance to Vset for Flex-direct submoduleiWhen the load board card is used, the normally closed switch of the high-voltage relay connected with the ith current-limiting resistor in series is switched off; wherein Vset1<Vset2<…Vseti…<Vsetn-1；
As the capacitor voltage of the flexible-straight submodule decreases, it decreases to ViWhen the load board card is connected with the normally closed switch of the high-voltage relay connected with the ith current-limiting resistor in series; v1<V2<…Vi…<Vn-1(ii) a When the voltage of the capacitor of the flexible-direct submodule drops to the voltage stabilizing value of the voltage stabilizing tube, the switch tube T1 is switched off, and the voltage is stabilized by the voltage stabilizing tube; and as the voltage of the capacitor is further reduced, the stable voltage of the voltage regulator tube is also reduced.
Further, V1＝Vset1<V2＝Vset2<…<Vi＝Vseti<…Vn-1＝Vsetn-1。
Examples
The following description is made with reference to a three-stage current limiting resistor. The resistance value of the three-level current-limiting resistor R1 is more than R2 and more than R3, and the current-limiting resistor R1 is connected with the high-voltage relay K1 in series; the current limiting resistor R2 is connected with the high-voltage relay K2 in series, and is connected with R1, K1 in series, and R2, K2 in series and then is connected with R3 in parallel.
The current limiting circuit is connected with a switch tube T1 and a voltage regulator tube Z1, the voltage regulator tube is used for stabilizing output voltage, and the switch tube is used for bypassing excessive current. And the control of the switching tube is realized by a resistor RL in series with the voltage-regulator tube.
The principle of the energy taking method is as follows:
when the submodule is electrified, the submodule capacitor starts to charge, the capacitor voltage starts to rise, meanwhile, the energy taking power supply quickly supplies power for the rear-stage load through the three-stage current limiting resistor and the normally closed high-voltage relay loop, but the stable voltage of the voltage stabilizing tube cannot be achieved due to the fact that the submodule voltage is low.
When the sub-module is electrified, the switch tube T1 is in an off state, voltage is output through Z1 and R4, the voltage is increased along with the increase of the sub-module capacitor voltage, when the sub-module capacitor voltage is increased to a voltage stabilizing value of the voltage stabilizing tube, the switch tube T1 is conducted under the action of the resistor RL, and then stable voltage is output all the time.
Then, as the voltage of the sub-module capacitor is further increased, the energy-obtaining power supply outputs stable voltage, and at the moment, the two ends of the resistors R1, R2 and R3 bear larger voltage, but the power is minimum because the resistance value of the resistor R3 is maximum; when the sub-module capacitor voltage reaches the set value Vset along with the increase of the capacitor voltage1When the high-voltage relay K1 is controlled to be switched off by the control board card, the resistor R1 is cut off from a power supply loop; when the sub-module capacitor voltage reaches the set value Vset along with the increase of the capacitor voltage2When the high-voltage relay K2 is controlled to be switched off by the control board card, the resistor R2 is cut off from a power supply loop; when the voltage of the sub-module is stabilized, the power is supplied to the subsequent control board card only through the resistor R3.
When the sub-module is powered off and the sub-module capacitor discharges, when the sub-module capacitor voltage reaches a set value V along with the reduction of the sub-module capacitor voltage2When the high-voltage relay K2 is controlled to be closed by the control panel card, the resistor R2 is connected in series into a power supply loop; when the capacitor voltage of the submodule reaches a set value V1When the high-voltage relay K1 is controlled to be closed by the control panel card, the resistor R1 is connected in series into a power supply loop; therefore, the output voltage of the energy taking power supply can be kept stable along with the reduction of the sub-module capacitor voltage, and the output voltage of the energy taking power supply is reduced gradually due to the gradual reduction of the sub-module capacitor voltage.
Further, V1＝Vset1<V2＝Vset2。
In addition, when the switch tube T1 has an open-circuit fault, only the voltage regulator tube Z1 and the series resistor remain in the voltage regulator circuit, and at this time, a stable voltage is output through the two devices.
In summary, the present invention relates to an energy-obtaining power supply and an energy-obtaining method for a flexible-direct sub-module, wherein the energy-obtaining power supply includes n current-limiting resistors, n-1 high-voltage relays, and a voltage-stabilizing circuit; the n current-limiting resistors form n parallel current-limiting circuits, wherein n-1 current-limiting resistors are respectively connected in series with the normally closed switch of the high-voltage relay; after the n parallel current limiting circuits are connected with the voltage stabilizing circuit in series, the n parallel current limiting circuits are connected to two ends of a capacitor of the flexible-straight submodule in parallel to obtain energy; the load board card controls the on-off of the n-1 high-voltage relays based on the voltage output by the voltage stabilizing circuit and adjusts the voltage output by the voltage stabilizing circuit. The energy-taking power supply has the advantages of simple structure, simple control, no need of a special control chip and high reliability. And the energy-taking power supply fault point is reduced without excessive electronic components. When the switch tube is in open-circuit fault, the stability of the output voltage can still be realized.
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 (8)
1. An energy-taking power supply of a flexible-direct submodule is characterized by comprising n current-limiting resistors, n-1 high-voltage relays and a voltage stabilizing circuit;
the n current-limiting resistors form n parallel current-limiting circuits R1 to Rn, wherein n-1 current-limiting resistors are respectively connected in series with a normally closed switch of the high-voltage relay;
after the n parallel current limiting circuits are connected with the voltage stabilizing circuit in series, the n parallel current limiting circuits are connected to two ends of a capacitor of the flexible-straight submodule in parallel to obtain energy;
the load board card controls the on-off of the n-1 high-voltage relays based on the voltage output by the voltage stabilizing circuit and adjusts the voltage output by the voltage stabilizing circuit.
2. The energy-taking power supply of the flexible-direct module as claimed in claim 1, wherein n current-limiting resistors are sequentially increased in resistance from R1 to Rn, and R1 to Rn-1 are respectively connected in series with normally-closed switches K1 to Kn-1 of the high-voltage relay.
3. The energy-taking power supply of the flexible-direct sub-module as claimed in claim 1 or 2, wherein the voltage stabilizing circuit comprises a switch tube, a voltage stabilizing tube and a series resistor; the switch tube is connected between the current limiting circuit and the negative electrode of the capacitor of the flexible-direct sub-module, the voltage stabilizing tube is connected with the series resistor in series and then connected with the switch tube in parallel, and the control end of the switch tube is connected with the series connection end of the voltage stabilizing tube and the series resistor; the two ends of the switching tube output voltage.
4. The energy-taking power supply of the flexible-direct module as claimed in claim 3, wherein when the switch tube fails, a voltage is output through the voltage regulator tube and the series resistor.
5. The energy-taking power supply of the flexible-direct module according to claim 3, wherein the withstand voltage value of the switch tube is larger than the voltage-stabilizing value of the voltage-stabilizing tube.
6. The energy-taking power supply of the flexible-straight submodule according to claim 1 or 2, wherein n is an integer, and n is more than or equal to 3.
7. The method for taking energy from the energy taking power supply of the flexible-direct module as claimed in one of claims 1 to 6, wherein after the flexible-direct module is powered on, the capacitor starts to charge, and as the capacitor of the flexible-direct module rises, the voltage stabilizing circuit is conducted, and the energy taking power supply starts to output voltage; raising of capacitance to Vset for Flex-direct submoduleiWhen the load board card is used, the normally closed switch of the high-voltage relay connected with the ith current-limiting resistor in series is switched off; wherein Vset1<Vset2<…Vseti…<Vsetn-1；
As the capacitor voltage of the flexible-straight submodule decreases, it decreases to ViWhen the load board card is connected with the normally closed switch of the high-voltage relay connected with the ith current-limiting resistor in series; v1<V2<…Vi…<Vn-1(ii) a When the voltage of the capacitor of the flexible-straight submodule drops to the voltage stabilizing value of the voltage stabilizing tube, the switch tube is switched off, and the voltage is stabilized by the voltage stabilizing tube; and as the voltage of the capacitor is further reduced, the stable voltage of the voltage regulator tube is also reduced.
8. The method of claim 7, wherein V isi＝Vseti。
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| CN202110814412.9A CN113760028B (en) | 2021-07-19 | 2021-07-19 | Energy taking power supply and energy taking method of flexible and straight submodule |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117458849A (en) * | 2023-10-19 | 2024-01-26 | 国网经济技术研究院有限公司 | Flexible direct current converter valve submodule topological structure and parameter design method thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102790385A (en) * | 2012-08-16 | 2012-11-21 | 大连世有电力科技有限公司 | Grounding current limiting device for transformer core |
| JP2015061504A (en) * | 2013-09-20 | 2015-03-30 | トヨタ自動車株式会社 | Power storage system |
| CN106452110A (en) * | 2016-11-18 | 2017-02-22 | 广州智光电气股份有限公司 | Power conversion apparatus and microgrid |
| CN108599543A (en) * | 2018-04-18 | 2018-09-28 | 广东希塔变频技术有限公司 | Power source charges control circuit and power source charges control method |
| CN109728715A (en) * | 2019-01-09 | 2019-05-07 | 全球能源互联网研究院有限公司 | A kind of start-up circuit and draw-out power supply of draw-out power supply |
| CN110380608A (en) * | 2019-08-15 | 2019-10-25 | 荣信汇科电气技术有限责任公司 | It is a kind of taking for application is connected with power module equalizing resistance can circuit |
| CN112886640A (en) * | 2021-03-08 | 2021-06-01 | 珠海格力电器股份有限公司 | Current limiting circuit and energy storage system |
| WO2021113161A2 (en) * | 2019-12-06 | 2021-06-10 | Chaojiong Zhang | System for forming and testing batteries in parallel and in series |
-
2021
- 2021-07-19 CN CN202110814412.9A patent/CN113760028B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102790385A (en) * | 2012-08-16 | 2012-11-21 | 大连世有电力科技有限公司 | Grounding current limiting device for transformer core |
| JP2015061504A (en) * | 2013-09-20 | 2015-03-30 | トヨタ自動車株式会社 | Power storage system |
| CN106452110A (en) * | 2016-11-18 | 2017-02-22 | 广州智光电气股份有限公司 | Power conversion apparatus and microgrid |
| CN108599543A (en) * | 2018-04-18 | 2018-09-28 | 广东希塔变频技术有限公司 | Power source charges control circuit and power source charges control method |
| CN109728715A (en) * | 2019-01-09 | 2019-05-07 | 全球能源互联网研究院有限公司 | A kind of start-up circuit and draw-out power supply of draw-out power supply |
| CN110380608A (en) * | 2019-08-15 | 2019-10-25 | 荣信汇科电气技术有限责任公司 | It is a kind of taking for application is connected with power module equalizing resistance can circuit |
| WO2021113161A2 (en) * | 2019-12-06 | 2021-06-10 | Chaojiong Zhang | System for forming and testing batteries in parallel and in series |
| CN112886640A (en) * | 2021-03-08 | 2021-06-01 | 珠海格力电器股份有限公司 | Current limiting circuit and energy storage system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117458849A (en) * | 2023-10-19 | 2024-01-26 | 国网经济技术研究院有限公司 | Flexible direct current converter valve submodule topological structure and parameter design method thereof |
| CN117458849B (en) * | 2023-10-19 | 2024-04-16 | 国网经济技术研究院有限公司 | Flexible direct current converter valve submodule topological structure and parameter design method thereof |
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