CN112953009A - System and method for fault protection and recovery of direct-current distribution network - Google Patents
System and method for fault protection and recovery of direct-current distribution network Download PDFInfo
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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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
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- 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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Abstract
The invention discloses a system and a method for fault protection and recovery of a direct-current distribution network, which comprise a single chip microcomputer, wherein the input end of the single chip microcomputer is electrically connected with the output end of a data signal acquisition module, the input end of the data signal acquisition module is electrically connected with the output end of an A/D conversion module, the input end of the A/D conversion module is electrically connected with the output end of a monitoring module, the input end of the monitoring module is electrically connected with the output end of a direct-current power supply, the single chip microcomputer is also electrically connected with a data storage module in a bidirectional mode, the output end of the single chip microcomputer is respectively electrically connected with the input ends of a display module, a relay, a fault protection module and a data analysis processing module, and the input. The invention has the real-time monitoring function, simple and convenient operation and higher protection mode applicability.
Description
Technical Field
The invention relates to the technical field of direct-current distribution networks, in particular to a system and a method for fault protection and recovery of a direct-current distribution network.
Background
Compared with an alternating-current distribution network, the direct-current distribution network provides a direct-current bus for loads, the direct-current loads can be directly supplied with power by the direct-current bus, the alternating-current loads need to be supplied with power after passing through inverter equipment, and if the proportion of the direct-current loads in the loads is large, the direct-current distribution network has great advantages. The direct-current distribution network has small line loss, high reliability, no need of phase-frequency control and strong distributed power supply accepting capability.
At present, overcurrent protection and traveling wave protection are generally adopted in a high-voltage direct-current protection system, because a direct-current power distribution system is complex in network topology structure and has a plurality of direct currents, and the overcurrent protection is difficult to ensure selectivity, and because the length of a line in a direct-current power distribution network is short, traveling wave protection is not suitable for the power distribution network, a system and a method for fault protection and recovery of the direct-current power distribution network are provided.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a system and a method for fault protection and recovery of a direct current distribution network, which have the functions of real-time monitoring, simple and convenient operation and high applicability of a protection mode.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a system for fault protection and recovery of a direct current distribution network comprises a single chip microcomputer, wherein the input end of the single chip microcomputer is electrically connected with the output end of a data signal acquisition module, the input end of the data signal acquisition module is electrically connected with the output end of an A/D conversion module, the input end of the A/D conversion module is electrically connected with the output end of a monitoring module, and the input end of the monitoring module is electrically connected with the output end of a direct current power supply;
the single-chip microcomputer is also in bidirectional electrical connection with the data storage module, the output end of the single-chip microcomputer is respectively in electrical connection with the input ends of the display module, the relay, the fault protection module and the data analysis processing module, the output end of the data analysis processing module is electrically connected with the input end of the database, the output end of the relay is electrically connected with the input end of the fault alarm module, the output end of the fault protection module is electrically connected with the input end of the fault recovery module, the output end of the fault recovery module is electrically connected with the input end of the communication module, and the output end of the communication module is in signal connection with the input end;
and the input end of the direct-current distribution network fault protection and recovery system is electrically connected with the output end of the power module.
The technical scheme of the invention is further improved as follows: the single chip microcomputer adopts an STM32F746VGT6 single chip microcomputer chip.
The technical scheme of the invention is further improved as follows: the A/D conversion module adopts an AD7701AN chip.
The technical scheme of the invention is further improved as follows: the monitoring module comprises a short circuit monitoring unit, a grounding and insulation monitoring unit, a direct current ring network monitoring unit and a leakage current monitoring unit.
The technical scheme of the invention is further improved as follows: the display module comprises a display screen.
The technical scheme of the invention is further improved as follows: the fault alarm module comprises an audible and visual alarm, and the type of the audible and visual alarm is TGSG-06C.
The technical scheme of the invention is further improved as follows: the data analysis processing module comprises a data signal processing unit, a data signal comparison unit and a fault analysis unit.
The technical scheme of the invention is further improved as follows: the fault protection module comprises an over-temperature protection unit, an overvoltage protection unit, a threshold value protection unit and a locking unit.
The technical scheme of the invention is further improved as follows: the fault recovery module includes a delayed restart unit.
A method for fault protection and recovery of a direct current distribution network comprises the following steps:
the first step,
The current data condition is monitored in real time through a monitoring module, data analysis is carried out through a data analysis processing module, and when the data are abnormal, the current is protected through a fault protection module;
step two,
After the current fault protection, after the data is recovered to be normal, the restarting recovery is carried out through the fault recovery module, the monitoring analysis processing operation is repeated when the restarting fails, and the restarting is carried out after the fault is eliminated.
Due to the adoption of the technical scheme, the invention has the technical progress that:
when the system and the method for protecting and recovering the fault of the direct-current distribution network are used, the direct-current distribution network is monitored in real time through the monitoring module, when the monitoring module monitors a channel fault, fault information is collected through the data signal collecting module, fault analysis is carried out through the data analyzing and processing module, after analysis is completed, fault protection is carried out through the fault protection module, and timely restart recovery is carried out after delay, so that the system and the method are simple and convenient to operate, high in applicability of a protection mode and applicable to the distribution network.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following examples:
as shown in fig. 1, a system for protecting and recovering from a fault of a direct current distribution network comprises a single chip microcomputer, wherein the single chip microcomputer adopts an STM32F746VGT6 single chip microcomputer chip, and is an integrated circuit chip, and a small and perfect microcomputer system is formed by integrating functions of a central processing unit CPU with data processing capability, a random access memory RAM, a read only memory ROM, various I/O ports, an interrupt system, a timer/counter and the like on a silicon chip by adopting a super-large scale integrated circuit technology.
The input end of the single chip microcomputer is electrically connected with the output end of the data signal acquisition module, the input end of the data signal acquisition module is electrically connected with the output end of the A/D conversion module, the input end of the A/D conversion module is electrically connected with the output end of the monitoring module, and the input end of the monitoring module is electrically connected with the output end of the direct current power supply. The A/D conversion module adopts an AD7701AN chip.
The single-chip microcomputer is further electrically connected with the data storage module in a bidirectional mode, the output end of the single-chip microcomputer is electrically connected with the input ends of the display module, the relay, the fault protection module and the data analysis processing module respectively, the output end of the data analysis processing module is electrically connected with the input end of the database, the output end of the relay is electrically connected with the input end of the fault alarm module, the output end of the fault protection module is electrically connected with the input end of the fault recovery module, the output end of the fault recovery module is electrically connected with the input end of the communication module, and the output end of the communication module is in signal connection with the input.
The relay is an electric control device, when the change of input quantity is up to the regulation requirement, the controlled quantity is changed into a predefined step change in the electric output circuit, it has the interaction relation between control system and controlled system, and is usually used in automatic control circuit, it is an "automatic switch" which actually uses small current to control large current operation, so that it can play the role of automatic regulation, safety protection and switching circuit in the circuit.
The monitoring module comprises a short circuit monitoring unit, a grounding unit, an insulation monitoring unit, a direct current looped network monitoring unit and a leakage current monitoring unit, the display module comprises a display screen, the fault alarm module comprises an audible and visual alarm, the type of the audible and visual alarm is TGSG-06C, the data analysis processing module comprises a data signal processing unit, a data signal comparison unit and a fault analysis unit, and the fault protection module comprises an over-temperature protection unit, an overvoltage protection unit, a threshold value protection unit and a locking unit.
The direct-current distribution network is monitored in real time through the monitoring module, when the monitoring module monitors a fault, fault information is collected through the data signal collecting module, fault analysis is carried out through the data analysis processing module, after analysis is completed, fault protection is carried out through the fault protection module, and timely restart recovery is carried out after delay, so that the operation is simple and convenient, the applicability of a protection mode is high, and the direct-current distribution network is applicable to the distribution network.
A method for fault protection and recovery of a direct current distribution network comprises the following steps:
the first step,
The current data condition is monitored in real time through a monitoring module, data analysis is carried out through a data analysis processing module, and when the data are abnormal, the current is protected through a fault protection module;
step two,
After the current fault protection, after the data is recovered to be normal, the restarting recovery is carried out through the fault recovery module, the monitoring analysis processing operation is repeated when the restarting fails, and the restarting is carried out after the fault is eliminated.
In summary, according to the system and the method for protecting and recovering the fault of the direct current distribution network, when the system and the method are used, the direct current distribution network is monitored in real time through the monitoring module, when the monitoring module monitors a channel fault, fault information is collected through the data signal collecting module and is analyzed through the data analyzing and processing module, after the analysis is completed, the fault is protected through the fault protecting module, and the restarting and recovering are performed in time after the delay, so that the system and the method are simple and convenient to operate, high in applicability of a protection mode and applicable to the distribution network.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (10)
1. The utility model provides a system for direct current distribution network fault protection and recovery which characterized in that: the system comprises a single chip microcomputer, wherein the input end of the single chip microcomputer is electrically connected with the output end of a data signal acquisition module, the input end of the data signal acquisition module is electrically connected with the output end of an A/D conversion module, the input end of the A/D conversion module is electrically connected with the output end of a monitoring module, and the input end of the monitoring module is electrically connected with the output end of a direct-current power supply;
the single-chip microcomputer is also in bidirectional electrical connection with the data storage module, the output end of the single-chip microcomputer is respectively in electrical connection with the input ends of the display module, the relay, the fault protection module and the data analysis processing module, the output end of the data analysis processing module is electrically connected with the input end of the database, the output end of the relay is electrically connected with the input end of the fault alarm module, the output end of the fault protection module is electrically connected with the input end of the fault recovery module, the output end of the fault recovery module is electrically connected with the input end of the communication module, and the output end of the communication module is in signal connection with the input end;
and the input end of the direct-current distribution network fault protection and recovery system is electrically connected with the output end of the power module.
2. The system for fault protection and recovery of a direct current distribution network according to claim 1, wherein: the single chip microcomputer adopts an STM32F746VGT6 single chip microcomputer chip.
3. The system for fault protection and recovery of a direct current distribution network according to claim 1, wherein: the A/D conversion module adopts an AD7701AN chip.
4. The system for fault protection and recovery of a direct current distribution network according to claim 1, wherein: the monitoring module comprises a short circuit monitoring unit, a grounding and insulation monitoring unit, a direct current ring network monitoring unit and a leakage current monitoring unit.
5. The system for fault protection and recovery of a direct current distribution network according to claim 1, wherein: the display module comprises a display screen.
6. The system for fault protection and recovery of a direct current distribution network according to claim 1, wherein: the fault alarm module comprises an audible and visual alarm, and the type of the audible and visual alarm is TGSG-06C.
7. The system for fault protection and recovery of a direct current distribution network according to claim 1, wherein: the data analysis processing module comprises a data signal processing unit, a data signal comparison unit and a fault analysis unit.
8. The system for fault protection and recovery of a direct current distribution network according to claim 1, wherein: the fault protection module comprises an over-temperature protection unit, an overvoltage protection unit, a threshold value protection unit and a locking unit.
9. The system for fault protection and recovery of a direct current distribution network according to claim 1, wherein: the fault recovery module includes a delayed restart unit.
10. A method for fault protection and recovery of a direct current distribution network is characterized by comprising the following steps:
the first step,
The current data condition is monitored in real time through a monitoring module, data analysis is carried out through a data analysis processing module, and when the data are abnormal, the current is protected through a fault protection module;
step two,
After the current fault protection, after the data is recovered to be normal, the restarting recovery is carried out through the fault recovery module, the monitoring analysis processing operation is repeated when the restarting fails, and the restarting is carried out after the fault is eliminated.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110241555.5A CN112953009A (en) | 2021-03-04 | 2021-03-04 | System and method for fault protection and recovery of direct-current distribution network |
| PCT/CN2021/104036 WO2022183646A1 (en) | 2021-03-04 | 2021-07-01 | Direct current distribution network fault protection and recovery system and method |
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| CN202110241555.5A CN112953009A (en) | 2021-03-04 | 2021-03-04 | System and method for fault protection and recovery of direct-current distribution network |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114336551A (en) * | 2022-01-14 | 2022-04-12 | 贵州大学 | Flexible direct current transmission system fault protection system based on MMC |
| WO2022183646A1 (en) * | 2021-03-04 | 2022-09-09 | 中国电建集团河北省电力勘测设计研究院有限公司 | Direct current distribution network fault protection and recovery system and method |
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| JP2008263744A (en) * | 2007-04-13 | 2008-10-30 | Chugoku Electric Power Co Inc:The | Equipment management system and equipment management method |
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| CN107492932A (en) * | 2017-09-08 | 2017-12-19 | 湖南长高思瑞自动化有限公司 | A kind of charge protection method and system of DC charging unit |
| CN112953009A (en) * | 2021-03-04 | 2021-06-11 | 中国电建集团河北省电力勘测设计研究院有限公司 | System and method for fault protection and recovery of direct-current distribution network |
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- 2021-07-01 WO PCT/CN2021/104036 patent/WO2022183646A1/en active Application Filing
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109921395A (en) * | 2019-04-23 | 2019-06-21 | 国网江苏省电力有限公司 | A kind of direct current distribution error protection and recovery system and method |
| CN112258804A (en) * | 2020-10-21 | 2021-01-22 | 浙江浙能兰溪发电有限责任公司 | Comprehensive analysis fault alarm system based on data packet data comparison |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2022183646A1 (en) * | 2021-03-04 | 2022-09-09 | 中国电建集团河北省电力勘测设计研究院有限公司 | Direct current distribution network fault protection and recovery system and method |
| CN114336551A (en) * | 2022-01-14 | 2022-04-12 | 贵州大学 | Flexible direct current transmission system fault protection system based on MMC |
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Effective date of registration: 20210702 Address after: 050031, No. 6 North China Avenue, Shijiazhuang, Hebei, Changan District Applicant after: POWERCHINA HEBEI ELECTRIC POWER ENGINEERING Co.,Ltd. Applicant after: STATE GRID HUBEI ELECTRIC POWER Co.,Ltd. Address before: 050031, No. 6 North China Avenue, Shijiazhuang, Hebei, Changan District Applicant before: POWERCHINA HEBEI ELECTRIC POWER ENGINEERING Co.,Ltd. |
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Application publication date: 20210611 |