CN113726190A - Fault classification-based fault processing method and device for in-phase power supply device - Google Patents
Fault classification-based fault processing method and device for in-phase power supply device Download PDFInfo
- Publication number
- CN113726190A CN113726190A CN202110923209.5A CN202110923209A CN113726190A CN 113726190 A CN113726190 A CN 113726190A CN 202110923209 A CN202110923209 A CN 202110923209A CN 113726190 A CN113726190 A CN 113726190A
- Authority
- CN
- China
- Prior art keywords
- fault
- module
- processing
- power unit
- side power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M5/4585—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only having a rectifier with controlled elements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/1216—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for AC-AC converters
Abstract
The invention relates to a fault grading-based fault processing method and device for an in-phase power supply device. The method for grading the faults of the modules of the in-phase power supply transformer fully considers the risk level of the faults and provides conditions for flexibly processing the faults on the premise of ensuring the safe operation of the device. Compared with a fault redundancy control mode of 'one-switch' for power module faults adopted by the same-phase power supply transformation device in the prior art, the technical scheme provided by the invention can reduce the module bypass condition caused by temporary or recoverable faults, thereby further improving the reliability and stability of the system.
Description
Technical Field
The invention relates to the technical field of power electronics, in particular to a fault grading-based fault processing method and device for an in-phase power supply device.
Background
The traction substation equipment of the in-phase power supply system mainly comprises a Traction Transformer (TT), a high-voltage matching transformer (HMT) and an in-phase power supply device (CPD). The traction transformer and the high-voltage matching transformer are usually packaged as a transformer, i.e. a SCOTT transformer, and when the apparent power of the M-base and the T-base on the low-voltage side of the transformer is equal and the power factor is equal, the negative-sequence current on the high-voltage side of the traction transformer is zero. The in-phase power supply device mainly comprises a traction matching transformer and an AC-DC-AC converter, the existing in-phase power supply converter mainly adopts a back-to-back series-parallel connection H bridge structure, one side of each H bridge is cascaded to form high-voltage output and is connected with a high-voltage matching transformer HMT (high voltage transformer), namely a T seat of a Scott transformer, a low-voltage winding of a traction matching transformer TMT is respectively connected with the other side of each H bridge, the grid-connected reactance of the T seat is a leakage reactance of the low-voltage winding of the traction matching transformer, the traction matching transformer TMT is a single-phase low-voltage side multi-winding transformer, and the high-voltage side of the TMT seat is connected to a traction bus.
The power supply system of the electrified railway is safe to national people and traffic. The in-phase power supply device is responsible for providing partial traction power for the electric locomotive and controlling the power quality of a power grid, and has high requirements on the reliability of the device. The core of the in-phase power supply device is an in-phase power supply converter formed by connecting a plurality of power electronic power modules in series and in parallel, and at present, power electronic equipment is still the part with higher failure rate in a total system, so that the improvement of the reliability of the in-phase power supply converter is an important condition for the overall popularization and application of the in-phase power supply device.
In the prior art, a fault handling method for a cophase power supply converter generally includes that a module is directly cut off through a bypass switch and a contactor of the module when the module fails, so that the purpose of redundancy control is achieved. According to the field engineering experience, when the bypass module is overhauled, the condition that the module has no abnormity and normally operates after being put into operation again is often found.
Disclosure of Invention
Based on the above situation in the prior art, an object of the present invention is to provide a fault classification-based fault processing method and device for an in-phase power supply device, which determine whether a module has a possibility of being put into operation again through fault classification, and can avoid the problem caused by "one-time cutting" of module faults in the conventional technical solutions, thereby reducing the system fault rate and improving the system stability.
In order to achieve the above object, according to one aspect of the present invention, there is provided a fault handling method for a fault-classification-based in-phase power supply apparatus, the in-phase power supply apparatus including a plurality of power modules cascaded at input side and output side, each power module including a parallel-side power unit and a cascaded-side power unit connected by a dc bus, the method including the steps of:
when the power module has a fault, the fault power module is subjected to blocking pulse processing, a fault identification position is set, and timing is carried out;
judging fault types and carrying out corresponding fault processing according to the fault types, wherein the fault types are divided into a primary fault, a secondary fault and a tertiary fault from high to low;
when the fault type is a primary fault, carrying out complete machine blocking pulse and tripping treatment;
when the fault type is a secondary fault, performing hardware bypass processing on a fault power module;
and when the fault type is a three-level fault and the time is counted to the first set time, performing software bypass processing on the fault power module and simultaneously performing fault monitoring.
Further, the blocking pulse processing of the fault power module includes blocking the driving pulses of the parallel side power unit and the cascade side power unit, while keeping a contactor connected between the parallel side power unit and the secondary side of the transformer closed, and keeping a bypass switch connected to an output terminal of the cascade side power unit open.
Further, the hardware bypass processing includes opening a contactor connected between the parallel side power unit and the secondary side of the transformer, and closing a bypass switch connected to an output terminal of the cascade side power unit.
And the software bypass processing comprises the conduction of a lower switching tube of a switching bridge arm of the power unit on the cascade side.
Further, the primary fault is a major fault, the secondary fault is a major fault, and the tertiary fault is a general fault.
Further, the major faults comprise overvoltage of the direct current bus voltage to be close to the maximum withstand voltage and failure of the bypass switch; the serious faults comprise controller power failure of the power module and driving faults of a switch tube; the general faults include overvoltage, undervoltage, overcurrent and overtemperature faults within the safe operation range of each component.
Further, when the fault type is a three-level fault:
if the fault monitoring finds a higher-level fault, skipping to a corresponding fault level processing step;
and if the fault monitoring finds that the fault disappears and the fault is maintained for the second set time, the fault power module is restarted after self-reset.
Further, the self-resetting the power module comprises:
keeping a contactor connected between the parallel side power unit and the secondary side of the transformer closed, and keeping a bypass switch connected to the output end of the cascade side power unit disconnected;
switching on a lower switching tube and switching off an upper switching tube of a switching bridge arm of the cascade side power unit, and switching off all switching tubes of the parallel side power unit;
and resetting the fault flag bit of the module and jumping to a ready to-start state.
Further, after the power module is restarted, judging whether a fault occurs within a third preset time, if so, performing hardware bypass processing on the parallel side power unit and the cascade side power unit; if not, the power module is converted into a normal operation state.
According to a second aspect of the present invention, there is provided a fault classification-based fault handling device for an in-phase power supply device, the in-phase power supply device including a plurality of power modules with input sides connected in parallel and output sides cascaded, each power module including a parallel-side power unit and a cascaded-side power unit connected by a dc bus, and including a pulse blocking module, a fault type determination module, a primary fault handling module, a secondary fault handling module, and a tertiary fault handling module; wherein the content of the first and second substances,
the pulse blocking module is used for carrying out blocking pulse processing and timing on the fault power module when the power module is in fault;
the fault type judging module is used for judging fault types, and the fault types are divided into a primary fault, a secondary fault and a tertiary fault from high to low;
the primary fault processing module is used for carrying out complete machine blocking pulse and tripping processing when the fault type is a primary fault;
the secondary fault processing module is used for performing hardware bypass processing on the fault power module when the fault type is a secondary fault;
and the third-level fault processing module is used for performing software bypass processing on the fault power module and simultaneously performing fault monitoring when the timing reaches a first set time when the fault type is a third-level fault.
In summary, the present invention provides a fault classification-based fault handling method and device for an in-phase power supply device, which determine and classify a fault when a power module of the in-phase power supply device fails, determine whether the module has a possibility of being put into operation again by fault classification, and adopt different handling strategies for faults of different classifications. The method for grading the faults of the modules of the in-phase power supply transformer fully considers the risk level of the faults and provides conditions for flexibly processing the faults on the premise of ensuring the safe operation of the device. Compared with a fault redundancy control mode of 'one-switch' for power module faults adopted by the same-phase power supply transformation device in the prior art, the technical scheme provided by the invention can reduce the module bypass condition caused by temporary or recoverable faults, thereby further improving the reliability and stability of the system.
Drawings
FIG. 1 is a schematic diagram of a primary system of a co-phased power supply;
FIG. 2 is a schematic diagram of a secondary system of an in-phase power supply;
FIG. 3 is a flow chart of the fault classification-based fault handling method for the in-phase power supply device according to the present invention;
fig. 4 is a block diagram showing the configuration of the fault handling device of the in-phase power supply device based on fault classification according to the present 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 an embodiment of the present invention, a fault handling method for an in-phase power supply device based on fault classification is provided, where the fault handling method provided in this embodiment may be used for fault handling of a power module in the in-phase power supply device, where the power module may adopt a power module with a back-to-back H-bridge series-parallel connection structure, and fig. 1 shows a schematic diagram of a primary system of the in-phase power supply device, as shown in fig. 1, the in-phase power supply device includes a traction matching transformer and a plurality of power modules cascaded at input sides and output sides in parallel, in an example provided in this embodiment, 18 windings are led out from a low-voltage side of the traction matching transformer, and the in-phase power supply device is formed by connecting 18 power modules in series and parallel. The primary side of the traction matching transformer is connected with a traction network, and each power module is connected with the secondary side of the traction matching transformer through a grid-connected contactor; each power module comprises a parallel side power unit and a cascade side power unit which are connected through a direct current bus, output ends connected with the plurality of power modules are connected to a power grid after being cascaded, and the output end of each power module is connected with a bypass switch. Fig. 2 is a schematic diagram of a secondary system of the in-phase power supply apparatus, the secondary system is mainly used for control, and includes a central controller, a parallel side power unit controller and a cascade side power unit controller, the central controller exchanges information with other control modules and systems, such as a coordination controller, a water cooling system, a traction matching transformer, etc., through electric signals, communicates with local equipment, receives an analog input signal and a switch input signal, and outputs a switch output signal. The central controller is respectively communicated with the parallel side power unit controller and the cascade side power unit controller, receives the power unit information and outputs a control signal. The parallel side power unit controller and the cascade side power unit controller can exchange power unit information with each other, can receive analog input signals and switch input signals, and output switch output signals.
The parallel side power unit controller and the cascade side power unit controller are respectively connected with the parallel side power unit and the cascade side power unit, receive the driving feedback signal of the power unit and output a pulse signal to the power unit for control. The various controllers may communicate with each other via fiber optics.
The flowchart of the fault handling method provided in this embodiment is shown in fig. 3, and includes the following steps:
in the normal operation process of the in-phase power supply device, when the power module breaks down, the fault power module is quickly blocked and pulse processing and timing are carried out. The faults of the power module comprise faults of a power unit at a parallel side and a power unit at a cascade side, and when the power unit controller at any side monitors that the power unit has faults, the fault information is sent to the power unit controller at the other side and is simultaneously uploaded to the central controller.
And judging the fault type and carrying out corresponding fault processing according to the fault type, wherein the fault type is divided into a primary fault, a secondary fault and a tertiary fault from high to low. The primary fault is a major fault, for example, a fault that the voltage of the direct-current bus is over-voltage to be close to the maximum withstand voltage, the bypass switch fails to operate, and the like, which may further cause equipment safety problems; the secondary fault is a serious fault, such as a fault with potential equipment risk, such as power failure of a controller of the power module, driving fault of a switching tube such as an IGBT (insulated gate bipolar transistor), and the like; the three-level faults are general faults, and the general faults comprise overvoltage, undervoltage, overcurrent, overtemperature faults and the like in the safe operation range of each component.
And when the fault type is a primary fault, carrying out complete machine blocking pulse and tripping treatment. In the primary fault treatment, the whole blocking pulse treatment can be realized by blocking IGBT driving pulses of all power modules of the parallel side power unit and the cascade side power unit and simultaneously disconnecting all contactors connected between the parallel side power unit and the secondary side of the transformer. And the tripping process means that the same-phase power supply device reports a fault and quits operation.
And when the fault type is a secondary fault, performing hardware bypass processing on the fault power module. The hardware bypass may be implemented by opening a contactor connected between the parallel-side power unit and the secondary side of the transformer and closing a bypass switch connected to the output of the cascade-side power unit.
When the fault type is a three-level fault, the grid-connected contactor and the bypass switch do not act, when the time is counted to a first set time, software bypass processing is carried out on the fault power module, and the power unit controller continues fault monitoring while software bypass is carried out. The first set time can be usually several milliseconds, and can be kept consistent with the closing action time of the bypass switch in specific implementation, so that the condition that the current of the cascade side is out of control due to bypass of a plurality of power unit software before the central controller performs the complete machine protection action due to occurrence of systematic faults can be avoided in the safe working range of the equipment. The software bypass can be realized by conducting a lower switching tube of a switching bridge arm of a cascade side power unit, for example, in a cascade side power unit of an H-bridge mechanism, the purpose of soft drop bypass is realized by conducting two lower tube IGBTs of an H-bridge. In a software bypass state, because the two lower tube IGBTs on the cascade side are conducted, a path can be provided for current on the cascade side, and meanwhile, because the contactor on the parallel side keeps a closing state, a direct current bus of the power module is electrified all the time, and the power unit controllers on the parallel side and the cascade side cannot lose power, so that the fault module is allowed to be in the software bypass state for a long time.
If the power unit controller finds a higher-level fault in the process of processing the three-level fault, skipping to a corresponding fault level processing step; and if the power unit controller finds that the fault disappears and maintains the fault for the second set time, the power unit controller restarts the power module with the fault after self-resetting. The second setting time is usually in the order of seconds to ensure that the module is in a more stable state before restarting, and avoid false triggering caused by restarting in a fault critical state. The self-resetting may include the steps of:
keeping a contactor connected between the parallel side power unit and the secondary side of the transformer closed, and keeping a bypass switch connected to the output end of the cascade side power unit disconnected;
switching on and switching off a lower switching tube and an upper switching tube of a switching bridge arm of the cascade side power unit, and switching off all switching tubes of the parallel side power unit; and resetting the fault flag bit of the module and jumping to a ready to-start state.
The difference between the self-reset and the normal reset is that during the self-reset, the contactor between the parallel-side power unit and the secondary side of the transformer needs to be kept closed, and the two lower tube IGBTs on the cascade side need to be conducted. The restart operation mainly comprises the following steps:
firstly, unlocking pulses by a parallel side power unit controller, controlling the direct current bus voltage of a power module to gradually rise to the rated direct current bus voltage according to the slope setting, and sending a voltage stabilization completion mark to a cascade side power unit controller;
after receiving the voltage stabilization completion flag, the cascade side power unit controller listens to the pulse instruction of the central controller, meanwhile, the parallel side power unit controller starts to execute the current instruction of the central controller, the parallel side power unit and the cascade side power unit are in a quasi-normal operation state, and the parallel side power unit and the cascade side power unit can be marked as a module which is just recovered from a fault by setting a flag bit.
After the power module is restarted, it is further required to determine whether a fault occurs within a third preset time, where the third preset time is usually a second-level time, and includes a start time required by the power module in a start process and a dynamic adjustment time required from normal operation to steady-state operation. If yes, hardware bypass is conducted on the parallel side power unit and the cascade side power unit, namely the fault unit is removed in a hardware bypass mode, the processing mode can avoid the situation that the power module is repeatedly switched for many times, and the stable operation characteristic of the system is improved; if not, the power module is converted into a normal operation state, and the previously set fault recovery identification bit is cleared.
According to another embodiment of the present invention, there is provided a fault classification-based fault handling apparatus for an in-phase power supply apparatus, the in-phase power supply apparatus includes a plurality of power modules cascaded at input side and output side, each power module includes a parallel side power unit and a cascaded side power unit connected by a dc bus, and includes a fast pulse blocking module, a fault type determination module, a primary fault handling module, a secondary fault handling module, and a tertiary fault handling module, and a block diagram of the fault handling apparatus is shown in fig. 4:
the rapid pulse blocking module is used for carrying out blocking pulse processing and timing on the fault power module when the power module is in fault;
the fault type judging module is used for judging fault types, and the fault types are divided into a primary fault, a secondary fault and a tertiary fault from high to low;
the primary fault processing module is used for carrying out complete machine blocking pulse and tripping processing when the fault type is a primary fault;
the secondary fault processing module is used for performing hardware bypass processing on the fault power module when the fault type is a secondary fault;
and the third-level fault processing module is used for performing software bypass processing on the fault power module and simultaneously performing fault monitoring when the timing is up to the first set time when the fault type is the third-level fault.
The specific steps of the device for realizing the corresponding functions of the modules are the same as the method provided in the first embodiment of the present invention, and are not described herein again.
In summary, the present invention relates to a fault classification-based fault handling method and device for an in-phase power supply device, wherein when a power module of the in-phase power supply device fails, the fault is determined and classified, whether the module has a possibility of being put into operation again is determined by fault classification, and different handling strategies are adopted for faults of different classifications. The method for grading the faults of the modules of the in-phase power supply transformer fully considers the risk level of the faults and provides conditions for flexibly processing the faults on the premise of ensuring the safe operation of the device. Compared with a fault redundancy control mode of 'one-switch' for power module faults adopted by the same-phase power supply transformation device in the prior art, the technical scheme provided by the invention can reduce the module bypass condition caused by temporary or recoverable faults, thereby further improving the reliability and stability of the system.
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. A fault classification-based fault processing method for an in-phase power supply device, wherein the in-phase power supply device comprises a plurality of power modules with input sides connected in parallel and output sides cascaded, each power module comprises a parallel side power unit and a cascaded side power unit which are connected through a direct current bus, and the fault processing method is characterized by comprising the following steps of:
when the power module has a fault, the fault power module is subjected to blocking pulse processing, a fault identification position is set, and timing is carried out;
judging fault types and carrying out corresponding fault processing according to the fault types, wherein the fault types are divided into a primary fault, a secondary fault and a tertiary fault from high to low;
when the fault type is a primary fault, carrying out complete machine blocking pulse and tripping treatment;
when the fault type is a secondary fault, performing hardware bypass processing on a fault power module;
and when the fault type is a three-level fault and the time is counted to the first set time, performing software bypass processing on the fault power module and simultaneously performing fault monitoring.
2. The method of claim 1, wherein the blocking pulse processing of the fault power module comprises blocking the driving pulses of the parallel-side power unit and the cascade-side power unit while keeping a contactor connected between the parallel-side power unit and the secondary side of the transformer closed and keeping a bypass switch connected to an output terminal of the cascade-side power unit open.
3. The method of claim 2, wherein the hardware bypass process comprises opening a contactor connected between the parallel side power cells and the secondary side of the transformer and closing a bypass switch connected to an output of the cascade side power cells.
4. The method of claim 2, wherein the software bypass process comprises turning on lower switching tubes of a cascaded side power cell switch leg.
5. The method according to any one of claims 2-4, wherein the primary fault is a major fault, the secondary fault is a major fault, and the tertiary fault is a general fault.
6. The method of claim 5, wherein the catastrophic failure comprises overvoltage of the dc bus voltage to near maximum withstand voltage and a bypass switch failure; the serious faults comprise controller power failure of the power module and driving faults of a switch tube; the general faults include overvoltage, undervoltage, overcurrent and overtemperature faults within the safe operation range of each component.
7. The method of claim 6, further comprising, when the fault type is a tertiary fault:
if the fault monitoring finds a higher-level fault, skipping to a corresponding fault level processing step;
and if the fault monitoring finds that the fault disappears and the fault is maintained for the second set time, the fault power module is restarted after self-reset.
8. The method of claim 7, wherein the self-resetting the power module comprises:
keeping a contactor connected between the parallel side power unit and the secondary side of the transformer closed, and keeping a bypass switch connected to the output end of the cascade side power unit disconnected;
switching on a lower switching tube and switching off an upper switching tube of a switching bridge arm of the cascade side power unit, and switching off all switching tubes of the parallel side power unit;
and resetting the fault flag bit of the module and jumping to a ready to-start state.
9. The method according to claim 8, further comprising, after the power module is restarted, determining whether a fault occurs within a third preset time, and if so, performing hardware bypass processing on the parallel side power unit and the cascade side power unit; if not, the power module is converted into a normal operation state.
10. A fault classification-based fault processing device for an in-phase power supply device comprises a plurality of power modules with input sides connected in parallel and output sides cascaded, wherein each power module comprises a parallel side power unit and a cascaded side power unit which are connected through a direct current bus, and the fault processing device is characterized by comprising a pulse blocking module, a fault type judging module, a primary fault processing module, a secondary fault processing module and a tertiary fault processing module; wherein the content of the first and second substances,
the pulse blocking module is used for carrying out blocking pulse processing and timing on the fault power module when the power module is in fault;
the fault type judging module is used for judging fault types, and the fault types are divided into a primary fault, a secondary fault and a tertiary fault from high to low;
the primary fault processing module is used for carrying out complete machine blocking pulse and tripping processing when the fault type is a primary fault;
the secondary fault processing module is used for performing hardware bypass processing on the fault power module when the fault type is a secondary fault;
and the third-level fault processing module is used for performing software bypass processing on the fault power module and simultaneously performing fault monitoring when the timing reaches a first set time when the fault type is a third-level fault.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110923209.5A CN113726190A (en) | 2021-08-12 | 2021-08-12 | Fault classification-based fault processing method and device for in-phase power supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110923209.5A CN113726190A (en) | 2021-08-12 | 2021-08-12 | Fault classification-based fault processing method and device for in-phase power supply device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113726190A true CN113726190A (en) | 2021-11-30 |
Family
ID=78675538
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110923209.5A Pending CN113726190A (en) | 2021-08-12 | 2021-08-12 | Fault classification-based fault processing method and device for in-phase power supply device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113726190A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101819430A (en) * | 2010-01-28 | 2010-09-01 | 中电电气(江苏)股份有限公司 | Fault signal processing system of high-voltage frequency converter controller and working method thereof |
| US20150357939A1 (en) * | 2014-06-09 | 2015-12-10 | Lsis Co., Ltd. | Cascaded h-bridge inverter capable of operating in bypass mode |
| CN108016297A (en) * | 2016-10-31 | 2018-05-11 | 长城汽车股份有限公司 | Fault handling method, motor driven systems and the vehicle of motor driven systems |
| CN109347153A (en) * | 2018-09-25 | 2019-02-15 | 中国电力科学研究院有限公司 | A kind of mixed cell cascaded H-bridges energy-storage system single-phase power control method and system |
| CN110445137A (en) * | 2019-08-14 | 2019-11-12 | 珠海格力电器股份有限公司 | The fault handling method and its device of alternating current-direct current mixed power supply system |
| CN111162522A (en) * | 2020-01-02 | 2020-05-15 | 南方电网科学研究院有限责任公司 | Power distribution network reliability assessment method and device and storage medium |
| CN112187064A (en) * | 2020-10-16 | 2021-01-05 | 西安许继电力电子技术有限公司 | Method and device for controlling back-to-back series-parallel H-bridge converter |
-
2021
- 2021-08-12 CN CN202110923209.5A patent/CN113726190A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101819430A (en) * | 2010-01-28 | 2010-09-01 | 中电电气(江苏)股份有限公司 | Fault signal processing system of high-voltage frequency converter controller and working method thereof |
| US20150357939A1 (en) * | 2014-06-09 | 2015-12-10 | Lsis Co., Ltd. | Cascaded h-bridge inverter capable of operating in bypass mode |
| CN108016297A (en) * | 2016-10-31 | 2018-05-11 | 长城汽车股份有限公司 | Fault handling method, motor driven systems and the vehicle of motor driven systems |
| CN109347153A (en) * | 2018-09-25 | 2019-02-15 | 中国电力科学研究院有限公司 | A kind of mixed cell cascaded H-bridges energy-storage system single-phase power control method and system |
| CN110445137A (en) * | 2019-08-14 | 2019-11-12 | 珠海格力电器股份有限公司 | The fault handling method and its device of alternating current-direct current mixed power supply system |
| CN111162522A (en) * | 2020-01-02 | 2020-05-15 | 南方电网科学研究院有限责任公司 | Power distribution network reliability assessment method and device and storage medium |
| CN112187064A (en) * | 2020-10-16 | 2021-01-05 | 西安许继电力电子技术有限公司 | Method and device for controlling back-to-back series-parallel H-bridge converter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107086555B (en) | A kind of DC solid circuit breaker control method with adaptive throttling ability | |
| US10923906B2 (en) | Fault switch configuration and clearing method in flexible DC converter station | |
| CN106936121B (en) | Direct-current line fault isolation and reclosing strategy mainly based on direct-current circuit breaker | |
| CN102403886B (en) | Method for protecting direct current line transient short-circuit fault of modular multiple-level converter | |
| CN110024245B (en) | Method for controlling a facility allowing the transmission of direct current in a network while protecting said network from short-circuit faults | |
| KR20120089751A (en) | Device and method to break the current of a power transmission or distribution line and current limiting arrangement | |
| CN108879623B (en) | Multi-voltage-level direct current network system and control protection method | |
| Li et al. | Dc fault protection of multi-terminal VSC-HVDC system with hybrid dc circuit breaker | |
| CN111987706B (en) | Current-limiting type controllable lightning arrester, current converter, power transmission system and control method | |
| CN110137902B (en) | Circuit and method for preventing bypass switch of flexible direct current power module from closing | |
| WO2021022949A1 (en) | Looped network controller and control method | |
| CN106532665B (en) | A kind of commutation failure blocking method based on dynamic reclosing time sequence | |
| CN105680424B (en) | The guard method of the overhead transmission line temporary fault of flexible direct current power transmission system | |
| CN111244905A (en) | Direct-current circuit breaker reclosing method and system based on voltages at two ends of circuit breaker | |
| CN112421615A (en) | Power distribution station self-healing control method and system based on intelligent breaker action | |
| CN113488968A (en) | Fault isolation system and method | |
| CN111817268B (en) | Fault processing method, fault processing device and direct current transmission system | |
| CN116526559A (en) | Distribution network self-adaptive reclosing method considering DG low voltage ride through characteristics | |
| CN113726190A (en) | Fault classification-based fault processing method and device for in-phase power supply device | |
| CN105490244A (en) | Z source direct-current circuit breaker | |
| CN115800190A (en) | Medium-low speed magnetic suspension traffic grounding protection system and method thereof | |
| CN215817504U (en) | Motor soft start circuit and motor start cabinet | |
| CN114336953B (en) | Control method of energy router, central controller and energy router | |
| CN113162000B (en) | Improved self-adaptive current-limiting direct current solid-state circuit breaker and control method thereof | |
| CN110165641B (en) | Superposition method of direct current circuit breaker in flexible direct current transmission system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |