CN207410019U - A kind of power distribution network distribution differential protective system - Google Patents
A kind of power distribution network distribution differential protective system Download PDFInfo
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- CN207410019U CN207410019U CN201721453942.0U CN201721453942U CN207410019U CN 207410019 U CN207410019 U CN 207410019U CN 201721453942 U CN201721453942 U CN 201721453942U CN 207410019 U CN207410019 U CN 207410019U
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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
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems
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Abstract
The utility model discloses a kind of power distribution network distribution differential protective system, including distributed protection measure and control device and remote dispatching host；Distributed protection measure and control device includes several protection supervisory equipments, and the protection supervisory equipment includes analogue collection module, switching value acquisition module, switching value output module, optical fiber temperature-measurement module, CPU module and communication module；Analogue collection module gathers the electric current and voltage data at each regional power grid node, and is transmitted to CPU module；Switching value acquisition module gathers the status signal of breaker, and is transmitted to CPU module；Optical fiber temperature-measurement module detects the temperature signal at each regional power grid node, and is transmitted to CPU module；CPU module receives data, and remote dispatching host is sent data to by communication module, and synchrodata is sent to protection supervisory equipment by remote dispatching host.The utility model can control each corresponding circuit breaker trip action by protection supervisory equipment simultaneously in differential protection zone internal fault.
Description
Technical field
The utility model is related to differential protective systems, and in particular to a kind of power distribution network distribution differential protective system.
Background technology
With increasing for photovoltaic plant distributed plant-grid connection power distribution network, the power flow direction in power distribution network is caused to produce
It is raw uncertain, cannot increasingly it be met based on the identification of the distribution network failure of current amplitude and orientation principle and partition method in the past
The requirement of scene operation, it is necessary to introduce the differential protection based on electric current or power as distribution protection allocation plan.But
Differential protection in previous substation if applied to power distribution network there are following difficulties：1) breaker in power distribution network at a distance of compared with
Far, it is by cable that the differential protection for being galvanically connected to a concentration is unrealistic；If 2) using in intelligent substation
Combining unit distributed synchronization sampling configuration, in power distribution network the breaker of substantial amounts again satellite clock pair difficult to arran when system；
3) the master-slave mode sampling synchronization method of two or three breakers of strange land is directed in optical-fiber longitudinal difference protection, network is also unsuitable for and opens up
Flutterring operating status has larger probabilistic power distribution network application scenarios.
In conclusion in the prior art for existing differential protective system be not suitable for breaker in power distribution network at a distance of compared with
Far, and it is not suitable for network topology operating status and has the problem of larger probabilistic power distribution network application, still lacks effective solution
Certainly scheme.
Utility model content
In order to overcome the above-mentioned deficiencies of the prior art, the utility model provides a kind of power distribution network distribution differential protection system
System, the system are influenced, from advantages such as network topology operating status variation influences from distribution power flow direction, had preferable
Selectivity, flexibility, reliability and quick acting ability.
Technical solution is used by the utility model：
A kind of power distribution network distribution differential protective system is both provided with open circuit at each regional power grid node of power distribution network
Device, including distributed protection measure and control device and remote dispatching host；
The distributed protection measure and control device includes several protections being arranged at each regional power grid node of power distribution network and surveys
Device is controlled, the protection supervisory equipment includes analogue collection module, switching value acquisition module, switching value output module, optical fiber
Temperature measurement module, CPU module and communication module；
Wherein, the analogue collection module, for gathering electric current and voltage data at each regional power grid node, by institute
It states electric current and voltage data is transmitted to CPU module；
The switching value acquisition module, for gathering the division status signal of breaker, and by division status signal transmission
To CPU modules；
The optical fiber temperature-measurement module for detecting the temperature signal at each regional power grid node, and temperature signal is transmitted
To CPU modules；
The switching value output module for receiving the control signal of CPU module transmission, controls the divide-shut brake of breaker to grasp
Make；
The CPU module, for receiving electric current, voltage, temperature and division status data, by communication module and system
CPU module and remote dispatching host exchanging data in other protection supervisory equipments；
The remote dispatching host, for receiving the data of each protection supervisory equipment output, carry out corresponding alarm and
It has been shown that, while send synchrodata to each protection supervisory equipment.
Further, the analogue collection module includes the first current transformer, voltage transformer, signal conditioning circuit
With A/D conversion circuits, the output terminal input with signal conditioning circuit respectively of first current transformer and voltage transformer
End connection, the output terminal of the signal conditioning circuit are connected with A/D conversion circuits, the electric current of the first current transformer output
Signal and the voltage signal of voltage transformer output are exported after signal conditioning circuit and A/D conversion circuits to CPU module respectively.
Further, the switching value acquisition module includes sequentially connected filter rectifier, decompression tube, current limliting electricity
Resistance, sample resistance and optical coupling isolation circuit.
Further, the switching value output module include photoelectrical coupler and triode, the photoelectrical coupler it is defeated
Enter end to be connected with CPU module, receive to control the relay control signal of relay coil break-make, the photoelectrical coupler
Output loop one end and one end of relay coil connect, the collector of the other end and triode connects, the triode
The other end of emitter and relay coil connects.
Further, the communication module includes local communication interface, wired network interface and radio network interface, described
Local communication interface includes RS232 interface, RS485 interfaces and USB interface, and the wired network interface includes fiber optic Ethernet end
Mouthful；Public radio communication network interface or Wifi, LoRa of the radio network interface including GSM, CDMA, WCDMA,
ZigBee wireless communication interfaces.
Further, the protection supervisory equipment further includes power management module, voltage transformer, solar cell and storage
Battery, the input terminal connection CPU module of the power management module, the output terminal connection voltage of the power management module are mutual
Sensor, solar cell and accumulator；The Power Management Unit provides power supply by voltage transformer for system, utilizes simultaneously
Voltage transformer and solar cell charge to accumulator, when voltage transformer primary side has a power failure, automatically access the sun
Energy battery is system power supply, and when solar energy does not have energy yet, access accumulator is system power supply.
Further, the protection supervisory equipment further includes overload protection module, and the overload protection module includes second
Current transformer and over-current detection control loop, the over-current detection control loop include rectification circuit, filter circuit and threshold value
Comparator, the output terminal of second current transformer and the input terminal of rectification circuit connect, the output terminal of the rectification circuit
It is connected by filter circuit and the input terminal of threshold comparator, the output terminal of the threshold comparator and switching value output module
Input terminal connects, and data latches and D/A converter are serially connected between the threshold comparator and CPU module.
Further, the protection supervisory equipment further includes human-machine interface module, and the human-machine interface module uses liquid crystal
Display screen；For real-time displaying device gathered data.
Further, the remote dispatching host includes dsp controller, wireless communication module and is extended with two or more
The host of functional interface, between the dsp controller, wireless communication module and host with more than two expanded function interfaces
It is connected with each other；The dsp controller is each for receiving by wireless communication module and each protection supervisory equipment wireless connection
The analog signals and on-off model of protection supervisory equipment output, are transmitted to host；The host is by wired mode and often
The connection of a protection supervisory equipment, for receiving the analog signals and on-off model of each protection supervisory equipment output, and to
Each protection supervisory equipment sends synchrodata.
Further, the host includes processor, and the processor is connected with display, memory, printer and net
Network adapter.
Compared with prior art, the beneficial effects of the utility model are：
The utility model several protection supervisory equipments of distributed arrangement, several protection supervisory equipments in power distribution network
Data interconnection is realized by wired or wireless way respectively, has been had by all protection supervisory equipments of remote scheduling host computer control
Complete the same action behavior controls each corresponding breaker by protection supervisory equipment simultaneously in differential protection zone during internal fault
Trip operation controls respective corresponding breaker to keep this differential by protection supervisory equipment simultaneously in differential protection external area error
Protection is failure to actuate.
Description of the drawings
Fig. 1 is power distribution network distribution differential protective system structure diagram disclosed in the utility model embodiment；
Fig. 2 is protection supervisory equipment structure diagram disclosed in the utility model embodiment；
Wherein, 1, protection supervisory equipment, 2, wired or wireless network, 3, remote dispatching host, 4, host, 5, analog quantity adopts
Collect module, 6, switching value acquisition module, 7, switching value output module, 8, optical fiber temperature-measurement module, 9, CPU module, 10, man-machine interface
Module, 11, communication module, 12, dsp controller, 13, wireless communication module.
Specific embodiment
The utility model is further illustrated below in conjunction with the accompanying drawings.
In a kind of typical embodiment of the application, as shown in Figure 1, providing a kind of power distribution network distribution differential protection
System, is both provided with the breaker that can disconnect fault current at each regional power grid node of power distribution network, which includes dividing
Cloth protection supervisory equipment and remote dispatching host 3.
The distributed protection measure and control device includes several protections being arranged at each regional power grid node of power distribution network
Measure and control device 1, one side of each breaker set a protection supervisory equipment；Each protection supervisory equipment 1 passes through respectively
The realization of wired or wireless network 2 is interconnected.
The protection supervisory equipment 1 include analogue collection module 5, switching value acquisition module 6, switching value output module 7,
Optical fiber temperature-measurement module 8, CPU module 9, human-machine interface module 10 and communication module 11, the analogue collection module 5, switching value
Acquisition module 6, switching value output module 7, optical fiber temperature-measurement module 8, human-machine interface module 10 and communication module 11 respectively with CPU
Module 9 connects；
Wherein, the output terminal connection CPU module of the analogue collection module 5, for gathering the electric current of each track section
And voltage data, the electric current and voltage data are transmitted to CPU module；
The switching value acquisition module 6, for gathering the division status signal of breaker, and by division status signal transmission
To CPU modules；
Temperature signal for detecting the temperature signal of each track section, and is transmitted to CPU by the optical fiber temperature-measurement module 8
Module；
The switching value output module 7 for receiving the control signal of CPU module transmission, controls the divide-shut brake of breaker
Operation；
The CPU module 9 for receiving electric current, voltage and temperature measuring data, and is transmitted by wired or wireless way
Afield dispatching host machine, and receive remote dispatching host transmission voltage, electric current and temperature protection data, compare measurement data with
The difference of data is protected, carries out differential protection judgement, then the control of breaker is output a control signal to by switching value output module
Circuit processed controls circuit breaker trip；
The communication module 11, for its protection into its system by the data of CPU module in the protection supervisory equipment of place
CPU module and remote dispatching monitoring system are sent in measure and control device, while CPU moulds in other protection supervisory equipments in reception system
CPU module in data that block and remote dispatching monitoring system are sent and protection supervisory equipment where passing to；
The remote dispatching host 3 includes dsp controller 12, wireless communication module 13 and with more than two expanded function
The host 14 of interface, the dsp controller 12, wireless communication module 13 and the host 14 with more than two expanded function interfaces
Between be connected with each other；The dsp controller is by wireless communication module and each protection supervisory equipment wireless connection, for receiving
The analog signals and on-off model of each protection supervisory equipment output, are transmitted to host；The host passes through wired mode
It is connected with each protection supervisory equipment, for receiving the analog signals and on-off model of each protection supervisory equipment output,
And send voltage, electric current and temperature protection data to each protection supervisory equipment.Wherein, analog signals include voltage, electric current
And temperature data signal, the on-off model include the division valve status signal of relay.
Power distribution network distribution differential protective system disclosed in the present embodiment, several protection observing and controlling dresses of distributed arrangement
It puts, several protection supervisory equipments realize data interaction by wired or wireless way respectively, pass through remote dispatching host computer control
All protection supervisory equipments have duplicate action behavior, in differential protection zone simultaneously by protecting observing and controlling during internal fault
Device control each corresponds to circuit breaker trip action, is controlled simultaneously by protection supervisory equipment in differential protection external area error each
From corresponding breaker this differential protection is kept to be failure to actuate.
In the present embodiment, the analogue collection module 5 includes the first current transformer, voltage transformer, signal tune
Manage circuit and A/D conversion circuits, the output terminal of first current transformer and voltage transformer respectively with signal conditioning circuit
Input terminal connection, the output terminal of the signal conditioning circuit is connected with A/D conversion circuits, and first current transformer exports
Current signal and voltage transformer output voltage signal exported respectively after signal conditioning circuit and A/D conversion circuits to
CPU module.
In the present embodiment, the switching value acquisition module 6 includes sequentially connected filter rectifier, decompression tube, limit
Leakage resistance, sample resistance and optical coupling isolation circuit.
In the present embodiment, the switching value output module 7, which includes the switching value output module, includes photoelectrical coupler
And triode, the input terminal of the photoelectrical coupler are connected with CPU module, receive to control the relay of relay coil break-make
Device control signal, output loop one end of the photoelectrical coupler and one end of relay coil connect, the other end and triode
Collector connection, the other end of the emitter of the triode and relay coil connects.
In the present embodiment, the CPU module 9 is the core of protection supervisory equipment, is formed using high-performance CPU and FPGA
SCM system.
In the present embodiment, the communication module 11 connects including local communication interface, wired network interface and wireless network
Mouthful, the local communication interface includes RS232 interface, RS485 interfaces and USB interface, and the wired network interface includes optical fiber
Ethernet port；Public radio communication network interface or Wifi of the radio network interface including GSM, CDMA, WCDMA,
The wireless communication interface of LoRa, ZigBee.
In the present embodiment, the host 14 includes processor, and the processor is connected with display, memory, printing
Machine and network adapter.
On the basis of above-described embodiment, protection supervisory equipment further includes power management described in one embodiment of the invention
Module, voltage transformer, solar cell and accumulator, the input terminal connection CPU module of the power management module, the electricity
Output terminal connection voltage transformer, solar cell and the accumulator of source control module；The Power Management Unit passes through electricity
Pressure mutual inductor provides power supply for system, while is charged using voltage transformer and solar cell to accumulator, in voltage
When mutual inductor primary side has a power failure, solar cell is automatically accessed as system power supply, when solar energy does not have energy yet, accesses electric power storage
Pond is system power supply.
In the present embodiment, the power management module includes five integrated chips：LM3671、UCC28C45、
UCC28C45, ICE2A265 and NE555, LM3671 realization DC convertings, are charged the battery by ICE2A265, by
UCC28C45 converts cell voltage to system power supply, then different voltage class is converted by LM3671, realizes different electricity
Pressure needs, and when electric discharge, low pressure is detected by NE555, when cell voltage is less than some setting value, closes UCC28C45 controls
Device processed, to play defencive function, more than collaboration complete power management.
On the basis of above-described embodiment, protection supervisory equipment further includes overload protection described in one embodiment of the invention
Module, the overload protection module include the second current transformer and over-current detection control loop, and the over-current detection controls back
Road includes rectification circuit, filter circuit and threshold comparator, the output terminal of second current transformer and rectification circuit it is defeated
Enter end connection, the output terminal of the rectification circuit is connected by filter circuit and the input terminal of threshold comparator, the threshold value ratio
It is connected compared with the output terminal of device and the input terminal of switching value output module, number is serially connected between the threshold comparator and CPU module
According to latch and D/A converters；
In the present embodiment, the rectification circuit selects full-wave rectification bridge, and the filter circuit uses RC wave filters.
On the basis of above-described embodiment, the protection supervisory equipment further includes human-machine interface module, the man-machine interface
Module uses liquid crystal display；For real-time displaying device gathered data.
It is above-mentioned although specific embodiments of the present invention are described with reference to the accompanying drawings, but not to this practicality newly
The limitation of type protection domain, those skilled in the art should understand that, on the basis of the technical solution of the utility model, ability
Field technique personnel need not make the creative labor the various modifications or changes that can be made still in the protection model of the utility model
Within enclosing.
Claims (10)
1. a kind of power distribution network distribution differential protective system is both provided with breaker at each regional power grid node of power distribution network,
It is characterized in, including distributed protection measure and control device and remote dispatching host；
The distributed protection measure and control device includes several protection observing and controlling dresses being arranged at each regional power grid node of power distribution network
It puts, the protection supervisory equipment includes analogue collection module, switching value acquisition module, switching value output module, optical fiber temperature-measurement
Module, CPU module and communication module；
Wherein, the analogue collection module, for gathering electric current and voltage data at each regional power grid node, by the electricity
Stream and voltage data are transmitted to CPU module；
The switching value acquisition module, for gathering the division status signal of breaker, and by division status signal transmission to CPU
Module；
Temperature signal for detecting the temperature signal at each regional power grid node, and is transmitted to CPU by the optical fiber temperature-measurement module
Module；
The switching value output module for receiving the control signal of CPU module transmission, controls the breaking-closing operating of breaker；
The CPU module, for receiving electric current, voltage, temperature and division status data, by communication module with it is other in system
CPU module and remote dispatching host exchanging data in protection supervisory equipment；
The remote dispatching host, for receiving the data of each protection supervisory equipment output, carrying out alarm accordingly and showing,
Simultaneously synchrodata is sent to each protection supervisory equipment.
2. power distribution network distribution differential protective system according to claim 1, it is characterized in that, the analogue collection module
Including the first current transformer, voltage transformer, signal conditioning circuit and A/D conversion circuits, first current transformer and
The output terminal of voltage transformer is connected respectively with the input terminal of signal conditioning circuit, the output terminal and A/ of the signal conditioning circuit
D conversion circuits connect, the current signal of the first current transformer output and the voltage signal difference of voltage transformer output
It is exported after signal conditioning circuit and A/D conversion circuits to CPU module.
3. power distribution network distribution differential protective system according to claim 1, it is characterized in that, the switching value acquisition module
Including sequentially connected filter rectifier, decompression tube, current-limiting resistance, sample resistance and optical coupling isolation circuit.
4. power distribution network distribution differential protective system according to claim 1, it is characterized in that, the switching value output module
Bag photoelectrical coupler and triode, the input terminal of the photoelectrical coupler are connected with CPU module, and relay line is controlled for receiving
The relay control signal of break-make is enclosed, output loop one end of the photoelectrical coupler and one end of relay coil connect, separately
The collector of one end and triode connects, and the emitter of the triode and the other end of relay coil connect.
5. power distribution network distribution differential protective system according to claim 1, it is characterized in that, the communication module includes this
Ground communication interface, wired network interface and radio network interface, the local communication interface include RS232 interface, RS485 interfaces
And USB interface, the wired network interface include fiber optic Ethernet port；The radio network interface include GSM, CDMA,
The public radio communication network interface of WCDMA or Wifi, LoRa, ZigBee wireless communication interface.
6. power distribution network distribution differential protective system according to claim 1, it is characterized in that, the protection supervisory equipment is also
Including power management module, voltage transformer, solar cell and accumulator, the input terminal connection of the power management module
CPU module, output terminal connection voltage transformer, solar cell and the accumulator of the power management module；The power supply pipe
Reason unit provides power supply by voltage transformer for system, while accumulator is carried out using voltage transformer and solar cell
It charges, when voltage transformer primary side has a power failure, solar cell is automatically accessed as system power supply, in solar energy also without energy
When, access accumulator is system power supply.
7. power distribution network distribution differential protective system according to claim 1, it is characterized in that, the protection supervisory equipment is also
Including overload protection module, the overload protection module includes the second current transformer and over-current detection control loop, the mistake
Stream detection control loop include rectification circuit, filter circuit and threshold comparator, the output terminal of second current transformer with
The input terminal connection of rectification circuit, the output terminal of the rectification circuit are connected by filter circuit and the input terminal of threshold comparator
It connects, the output terminal of the threshold comparator and the input terminal of switching value output module connect, the threshold comparator and CPU module
Between be serially connected with data latches and D/A converter.
8. power distribution network distribution differential protective system according to claim 1, it is characterized in that, the protection supervisory equipment is also
Including human-machine interface module, the human-machine interface module uses liquid crystal display, for real-time displaying device gathered data.
9. power distribution network distribution differential protective system according to claim 1, it is characterized in that, the remote dispatching host bag
Include dsp controller, wireless communication module and the host with more than two expanded function interfaces, the DS controllers, channel radio
It is connected with each other between letter module and host with more than two expanded function interfaces；The dsp controller passes through wireless communication
Module and each protection supervisory equipment wireless connection, for receiving the analog signals and switch of each protection supervisory equipment output
Signal is measured, is transmitted to host；The host is connected by wired mode with each protection supervisory equipment, for receiving each protection
The analog signals and on-off model of measure and control device output, and send synchrodata to each protection supervisory equipment.
10. power distribution network distribution differential protective system according to claim 1, it is characterized in that, the host includes processing
Device, the processor are connected with display, memory, printer and network adapter.
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109103859A (en) * | 2018-10-24 | 2018-12-28 | 云南电网有限责任公司电力科学研究院 | A kind of distribution differential protection measure and control device for supporting 4G to communicate |
| CN109194414A (en) * | 2018-09-19 | 2019-01-11 | 中科芯集成电路股份有限公司 | A kind of test macro of Lora radio frequency mould group parameter |
| CN109713649A (en) * | 2018-12-12 | 2019-05-03 | 云南电网有限责任公司电力科学研究院 | A kind of DC boosting collects access system motor synchronizing resistance differential protecting method |
| CN110380378A (en) * | 2019-06-12 | 2019-10-25 | 积成电子股份有限公司 | Distributed 10KV power distribution network monitoring and protection system and guard method |
| CN110854798A (en) * | 2019-10-31 | 2020-02-28 | 国网山东省电力公司济宁供电公司 | Differential relay protection communication device, system and method based on 5G communication |
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| CN112736868A (en) * | 2020-12-23 | 2021-04-30 | 国网浙江省电力有限公司金华供电公司 | 5G intelligent distributed distribution network protection system |
| CN113079208A (en) * | 2021-03-26 | 2021-07-06 | 南方电网数字电网研究院有限公司 | Ethernet-based distributed control system and method for power distribution network |
| CN113381392A (en) * | 2021-06-23 | 2021-09-10 | 国网河北省电力公司信息通信分公司 | Distribution network distributed differential protection system |
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| CN109194414A (en) * | 2018-09-19 | 2019-01-11 | 中科芯集成电路股份有限公司 | A kind of test macro of Lora radio frequency mould group parameter |
| CN109103859B (en) * | 2018-10-24 | 2020-02-07 | 云南电网有限责任公司电力科学研究院 | Distribution network differential protection measurement and control device supporting 4G communication |
| CN109103859A (en) * | 2018-10-24 | 2018-12-28 | 云南电网有限责任公司电力科学研究院 | A kind of distribution differential protection measure and control device for supporting 4G to communicate |
| CN109713649A (en) * | 2018-12-12 | 2019-05-03 | 云南电网有限责任公司电力科学研究院 | A kind of DC boosting collects access system motor synchronizing resistance differential protecting method |
| CN110380378B (en) * | 2019-06-12 | 2022-03-08 | 积成电子股份有限公司 | Measurement and control protection method for distributed 10KV power distribution network |
| CN110380378A (en) * | 2019-06-12 | 2019-10-25 | 积成电子股份有限公司 | Distributed 10KV power distribution network monitoring and protection system and guard method |
| CN110854798A (en) * | 2019-10-31 | 2020-02-28 | 国网山东省电力公司济宁供电公司 | Differential relay protection communication device, system and method based on 5G communication |
| CN111725776A (en) * | 2020-04-27 | 2020-09-29 | 国网江苏省电力有限公司电力科学研究院 | FPGA-based power distribution network current differential protection device |
| CN111725776B (en) * | 2020-04-27 | 2022-08-23 | 国网江苏省电力有限公司电力科学研究院 | FPGA-based power distribution network current differential protection device |
| WO2022083070A1 (en) * | 2020-10-21 | 2022-04-28 | 石家庄科林电气股份有限公司 | Data transmission method of 5g differential protection apparatus |
| CN112736868A (en) * | 2020-12-23 | 2021-04-30 | 国网浙江省电力有限公司金华供电公司 | 5G intelligent distributed distribution network protection system |
| CN113079208A (en) * | 2021-03-26 | 2021-07-06 | 南方电网数字电网研究院有限公司 | Ethernet-based distributed control system and method for power distribution network |
| CN113381392A (en) * | 2021-06-23 | 2021-09-10 | 国网河北省电力公司信息通信分公司 | Distribution network distributed differential protection system |
| CN114050655A (en) * | 2021-11-22 | 2022-02-15 | 国网上海市电力公司 | Power distribution network self-healing system and method based on 5G communication technology |
| CN115241853A (en) * | 2022-08-15 | 2022-10-25 | 山西敬天继保电力有限公司 | 5G communication-based power distribution network differential protection system and method |
| CN116243043A (en) * | 2023-02-07 | 2023-06-09 | 泰安市众诚自动化软件有限公司 | Explosion-proof type voltage current transformer of motor side |
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