CN110649593A - Miniature synchronous phasor measuring device for power distribution network - Google Patents
Miniature synchronous phasor measuring device for power distribution network Download PDFInfo
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- CN110649593A CN110649593A CN201910742213.4A CN201910742213A CN110649593A CN 110649593 A CN110649593 A CN 110649593A CN 201910742213 A CN201910742213 A CN 201910742213A CN 110649593 A CN110649593 A CN 110649593A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/18—Indicating phase sequence; Indicating synchronism
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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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
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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
- Y04S10/22—Flexible AC transmission systems [FACTS] or power factor or reactive power compensating or correcting units
Abstract
The invention provides a micro synchronous phasor measuring device for a power distribution network, which comprises a bus, a CPU (central processing unit) module, at least one analog quantity acquisition module, an intelligent IO (input/output) module, a time synchronization module and a time keeping module, wherein the bus is connected with the CPU module through the time keeping module; the bus is a composite cable of a power bus and a communication bus; the analog quantity acquisition module is connected with a communication bus in the bus through a connector and transmits acquired data back to the CPU module through the communication bus; and the CPU module comprises a processor system PS and a programmable logic PL which carry out data interaction through an AXI communication interface. Each functional module is connected with the bus through a connector, so that a plug-in hardware structure is realized, the configuration of the structure is convenient and flexible, the structure can be configured to meet the measurement requirement of only single interval/ring main unit six intervals of a distribution network line, and a simulation acquisition loop can be flexibly configured; based on the design, the miniature synchronous phasor measurement device for the power distribution network is reduced in size, and the installation space is effectively saved.
Description
Technical Field
The invention belongs to the technical field of distribution automation, and particularly relates to a micro synchronous phasor measuring device for a power distribution network.
Background
With the continuous development of new energy technologies and the increasing enhancement of power requirements, the construction of a strong smart grid becomes the future development direction. The automation of the intelligent power distribution network is an important part in the construction of the intelligent power distribution network, is an important means for improving the power supply quality, improving the power supply reliability, expanding the power supply capacity and realizing the efficient and economic operation of the power distribution network, and is also one of important bases for realizing the intelligent power distribution network. The line scale of the power distribution network in China is large, the environment is complex, and the fault rate is high, so that the monitoring and control of the running state of the power distribution network have great significance for the efficient and economic running of the power distribution network.
The synchronized phasor measurement device based on the whole network unified clock is widely applied to the fields of dynamic process monitoring, online identification, safety and stability analysis, wide area control and the like of a power system, but the application of the synchronized phasor measurement device in a power distribution network still faces the following problems: the current synchronous phasor measuring device is mainly designed for a main network of 220kV and above, and needs to support 48 paths of analog signal acquisition so as to meet the requirement of multiple interval quantities of an intelligent substation. The power distribution system is directly oriented to users, and compared with a main network, the power distribution network has the advantages of wide coverage range of power distribution network lines, multiple branches, complex operation environment and lagged construction level. In some application occasions in the power distribution network, 48-path analog signal acquisition is not required to be supported, and the traditional synchronous phasor measuring device cannot be flexibly configured due to the fixed configuration of a signal acquisition channel, so that the device is heavy in size and single in application occasion, and can only be applied to important power plants and hub substations.
Therefore, a miniaturized synchronous phasor measuring device which is convenient to flexibly configure and small in size and suitable for a power distribution network is designed, and the device has important significance for improving the safe and reliable operation of the power distribution network.
Disclosure of Invention
The invention aims to solve the technical problems of heavy volume and single application occasion caused by fixed configuration of a collection path of the traditional transmission network synchronized phasor measurement for collecting multiple paths of analog signals, and provides a miniature power distribution network synchronized phasor measurement device.
In order to solve the problems, the invention adopts the following technical scheme:
the micro synchronous phasor measuring device for the power distribution network comprises a bus, a CPU module, an analog quantity acquisition module, an intelligent IO module, a time synchronization module and a time keeping module;
the bus is a composite cable of a power bus and a communication bus; data interaction is carried out between a communication bus in the bus and a master station or a PDC data concentrator, a remote control switching value command issued in a message form is analyzed, and phasor data information and remote signaling state information are uploaded; the CPU module is in bidirectional connection with a communication bus in the bus through a CPU module connector;
the analog quantity acquisition module is unidirectionally connected with a communication bus in the bus through an analog quantity acquisition module connector and is used for transmitting acquired three-phase voltage, three-phase current and zero-sequence current data at each interval back to the CPU module through the communication bus to perform A/D conversion and phasor calculation;
the intelligent IO module is in bidirectional connection with the communication bus through the IO module connector, receives the input quantity through the communication bus and outputs the output quantity to the switch; the output quantity comprises a remote control switching quantity command received by the bus and a switching quantity command output by the CPU module through the communication bus;
a power bus in the buses is connected with a power supply module, and power input ends of other modules are connected with the power bus;
the CPU module is used for phasor calculation, I/O processing and logic processing, adopts an SoC system-on-chip compact system architecture, comprises a processor system PS and a programmable logic PL, and performs data interaction between the processor system PS and the programmable logic PL by using an AXI communication interface;
the time setting module is connected with the CPU module and used for receiving a time setting signal of an external clock source;
the power distribution network micro synchronous phasor measurement device comprises a power supply module, preferably, the power supply module comprises a voltage transformer and a power supply module, and the voltage transformer is connected with the power supply module.
Still further, still include lead-acid batteries and battery management module, power module with through battery management module with lead-acid batteries is connected.
Furthermore, the time synchronization module is realized by adopting GPS/BD dual-mode time synchronization or B code time synchronization.
Furthermore, the timekeeping module is realized through a constant-temperature crystal oscillator arranged in the CPU module, and an external B code time service interface is provided through the CPU module.
Further preferably, the micro synchronous phasor measurement device for the power distribution network can select an optical fiber, a wireless private power network, a wireless public network or a 5G network to communicate with a master station or a PDC data concentrator.
The system further comprises a safety certification module which is connected with the communication bus through a safety certification module connector and used for carrying out safety certification on the remote control command analyzed by the communication bus and transmitting the signal after the safety certification to the CPU module through the communication bus for logic processing.
The invention has the following beneficial technical effects:
the invention combines the power line and communication lines of various physical layers into the bus, so that the field line is convenient to manage and maintain;
the functional modules are connected with the bus through the connectors, so that a plug-in hardware structure is realized, the configuration of the structure is convenient and flexible, the structure can be configured to meet the measurement requirements of single interval/ring main unit six intervals of a distribution network line, and a simulation acquisition loop can be flexibly configured. Based on the design, the minimum volume of the micro synchronous phasor measurement device for the power distribution network is only one eighth of that of the traditional main network PMU, the installation space is effectively saved, the installation and maintenance convenience is improved, the synchronous phasor measurement device can meet the distributed, low-cost and miniaturized synchronous phasor measurement requirements of the intelligent power distribution network, can be deployed in a large scale, and is suitable for various application occasions.
Drawings
FIG. 1 is a functional block diagram of a specific embodiment of the present invention;
FIG. 2 is a schematic diagram of an induction power supply according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an application scenario in accordance with an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an embodiment of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
A micro synchronous phasor measurement device for a power distribution network comprises a bus (namely a communication module shown in figure 1), a CPU module, a power supply module (not shown in figure 1), at least one analog quantity acquisition module, an intelligent IO module, a time synchronization module and a time keeping module;
data interaction is carried out between the bus and the master station or the PDC data concentrator, a remote control command issued in a message form is analyzed, and phasor data information and remote signaling state information are uploaded; the bus is a composite cable of a power bus and a communication bus;
the CPU module is bidirectionally connected with a communication bus in the bus through a CPU module connector;
the analog quantity acquisition module is unidirectionally connected with a communication bus in the bus through an analog quantity acquisition module connector and is used for transmitting acquired three-phase voltage, three-phase current and zero-sequence current data at each interval back to the CPU module through the communication bus to perform A/D conversion and phasor calculation;
the intelligent IO module is in bidirectional connection with the communication bus through the IO module connector, receives the input quantity through the communication bus and outputs a remote control switching quantity command to the switch;
a power bus in the buses is connected with the power supply module, and power input ends of other modules are connected with the power bus;
the CPU module is used for phasor calculation, I/O processing and logic processing, adopts an SoC system-on-chip compact system architecture, comprises a processor system PS (processing system) and a programmable logic PL (programmable logic), and uses an AXI communication interface to perform data interaction between the processor system PS (processing system) and the programmable logic PL (programmable logic) so as to realize low cost and miniaturization of the device.
The time setting module is connected with the CPU module and is used for receiving a time setting signal of an external clock source; the time keeping module is used for keeping high-precision synchronization when the standard clock signal is lost and is used for phasor calculation.
In the micro synchronous phasor measurement device for the power distribution network provided in the specific embodiment, the power supply module is an unnecessary technical feature, the power input end of the device can be directly connected with the external power supply module to realize power input, and the power supply module can be realized by adopting the prior art, which is not described herein.
In a specific embodiment, in order to implement the security authentication of data transmission, on the basis of the above embodiment, the security authentication module is further included to perform security authentication on the remote control command analyzed by the communication module, and transmit the signal after the security authentication to the CPU module to perform logic processing: after the CPU processes the command, the CPU sends a remote control output command to the intelligent IO module through a communication bus in the bus, and the functions of switch state monitoring and fault isolation are realized.
On the basis of the above embodiments, in a specific embodiment (as shown in fig. 2), the power supply module includes three parts, namely an energy extraction PT, a lead-acid battery, and a power supply module, wherein the energy extraction PT is used for reducing the voltage of the distribution line to AC220V, the lead-acid battery is used for storing energy, and the power supply module adopts a modular packaging technology, and has the characteristics of smaller size and higher power density, so as to convert alternating current into voltage required by normal operation of the device.
Further, on the basis of the above embodiment, in another embodiment, the power distribution system further includes a lead-acid battery and a battery management module, wherein the battery management module controls intelligent charging and discharging of the lead-acid battery, obtains energy from the power distribution line by using a voltage transformer, and uses the lead-acid battery as a backup power supply. In order to solve the problem of battery plate passivation caused by long-time non-discharge of the battery, the battery management module periodically activates the battery, and automatically restores the battery to charge when the battery discharges to the activation exit voltage, so that the service life of the battery is prolonged. The battery management module carries out intelligent management on the device, and long-term reliable and stable operation of the device is ensured; the flexible configuration and the multi-application of the device are realized by utilizing a plug-in hardware structure, and a foundation is provided for the miniaturization and diversification of the device.
In order to realize high-speed transmission of data information between the device and the master station or PDC data concentrator, in a specific embodiment, the bus is further used for real-time monitoring of the master station on system state information, and meanwhile, supports transmission of monitoring data to other devices for function expansion.
On the basis of the above embodiment, the time synchronization module is realized by adopting GPS/BD dual-mode time synchronization or B code time synchronization, and is compatible with multiple application scenes such as in a transformer substation, on a column, on a pole, a ring main unit and the like; the time keeping module is used for keeping time at high stability through a built-in constant temperature crystal oscillator and providing an external B code time service interface.
The communication bus in the bus carries out data interaction with the master station or the PDC data concentrator, analyzes a remote control command issued by the master station, and transmits phasor data information and remote signaling state information, the communication mode between the communication bus and the master station is flexible and configurable, and hybrid networking communication can be carried out in modes of optical fibers, electric power wireless private networks, wireless public networks, 5G (5 th generation mobile communication) and the like.
In a specific embodiment, the analog quantity acquisition module can be provided with a plurality of standby devices according to an application scene, and the standby devices are respectively connected with the bus through the analog quantity acquisition module connectors, so that the analog quantity acquisition module can flexibly configure 3U4I and 6U24I analog quantity acquisition loops at most according to the six-interval measurement requirement of a distribution network line single interval/ring main unit in combination with a plug-in hardware structure, and receive voltage and current data through the analog quantity acquisition module. Based on the design, the minimum volume of the miniature synchronized phasor measurement device for the power distribution network is only one eighth of that of the traditional main network PMU, so that the installation space is effectively saved, the installation and maintenance convenience is improved, and the miniature synchronized phasor measurement device can meet the requirements of distributed, low-cost and miniaturized synchronized phasor measurement for intelligent power distribution networks and can be deployed on a large scale.
Fig. 3 shows an application scenario of a specific embodiment of the present invention, as shown in fig. 3,
the overhead application scene is mainly provided with a single-interval distribution network micro synchronous phasor measuring device, namely 3U4I (three-phase voltage, three-phase current and zero-sequence current) is acquired, and synchronous sampling is realized by using GPS/Beidou satellite time synchronization, and a pole-on/pole-on mounting mode can be adopted.
The cable type application scene is mainly provided with a multi-interval type power distribution network micro synchronous phasor measuring device, the number of analog quantity acquisition channels is configured according to the field interval number, the cable type application scene is mainly used for switching stations, ring main units and the like, and B codes or GPS/Beidou satellites can be selected for time synchronization according to field conditions.
The distribution network micro synchronous phasor measurement device performs data interaction with a PDC data concentrator or a master station; carrying out data interaction between the PDC data concentrator and the master station; the communication modes of the three can be flexibly configured on site actual conditions, and hybrid networking communication can be carried out in modes of optical fibers, electric wireless private networks, wireless public networks, 5G (5 th generation mobile communication) and the like.
The micro synchronous phasor measurement device for the power distribution network can select satellite synchronous time synchronization (BD/GPS dual module) or external B code time synchronization according to whether an application scene has a clock source, the satellite synchronous time synchronization is mainly used for solving the problem that the application scenes such as a switching station, a ring main unit and a column do not have the clock source, and after the device is subjected to time synchronization, a B code time service interface is provided for the outside by adopting the satellite synchronous time synchronization and is used for a data concentrator (PDC) time service signal;
the micro synchronous phasor measurement device for the power distribution network can perform phasor synchronous measurement on time synchronization information based on the whole network, stores acquired dynamic and transient data and transmits the dynamic and transient data to the PDC data concentrator at a high speed.
In a specific embodiment, the micro synchronous phasor measurement device for the power distribution network provided by the invention has the functions of fault positioning and local isolation, zero-sequence current is collected through the analog quantity collection module, the collected data is transmitted to the CPU module through the bus for phasor calculation, when the CPU module judges that zero-sequence overcurrent fault occurs, if the red marking position has ground fault, the CPU starts the zero-sequence overcurrent protection of the synchronous phasor measurement device for the power distribution network at the upstream of the fault point through the bus, judges that the fault point is positioned at the downstream of the device, outputs a switch amount control command to the intelligent IO module through the bus to cut off a switch on a side column, isolates the fault, and records an event to send to the PDC data concentrator.
It should be noted that, a plurality of modules in the present invention may be implemented by using existing or conventional modules, for example, a security authentication module and an intelligent IO module therein.
Fig. 4 is a schematic diagram of a hardware structure of a micro synchronous phasor measurement apparatus for a power distribution network. The device adopts a 4U (144mm multiplied by 140mm) board card modularized hardware structure design, wherein a CPU and a power supply board are configured as a device foundation, and an alternating current head (namely a sampling board) and an opening-in and opening-out board shown in figure 4 can be flexibly configured according to the acquisition requirements of on-site analog quantity and switching quantity. In this embodiment, a plurality of flexibly configurable analog quantity acquisition modules are integrated on a sampling plate; a plurality of flexibly configurable intelligent IO modules are integrated on the input/output board.
Each sampling plate supports 15 analog quantity acquisition at most, and the minimum volume of the micro synchronous phasor measurement device for the power distribution network is only one eighth of that of the traditional main network PMU. As shown in fig. 4, in the present embodiment, two ac headers are provided, and each ac header is connected to a connector connected to a bus via an SPI interface. The present embodiment is configured with two access panels and each access panel is connected to a bus. The power supply module is arranged on the power panel and comprises an energy acquisition PT, a lead-acid battery and a power module, wherein the energy acquisition PT is used for reducing the voltage of a distribution line to AC220V and then is connected with the power module to output a stable 24V direct current power supply.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by using equivalent alternatives or equivalent variations fall within the scope of the present invention.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (9)
1. The utility model provides a distribution network miniature synchrophasor measuring device which characterized in that: the device comprises a bus, a CPU module, at least one analog quantity acquisition module, an intelligent IO module, a time synchronization module and a time keeping module;
the bus is a composite cable of a power bus and a communication bus; data interaction is carried out between a communication bus in the bus and a master station or a PDC data concentrator, a remote control switching value command issued in a message form is analyzed, and phasor data information and remote signaling state information are uploaded; the CPU module is in bidirectional connection with a communication bus in the bus through a CPU module connector;
the analog quantity acquisition module is unidirectionally connected with a communication bus in the bus through an analog quantity acquisition module connector and is used for transmitting acquired three-phase voltage, three-phase current and zero-sequence current data at each interval back to the CPU module through the communication bus to perform A/D conversion and phasor calculation;
the intelligent IO module is in bidirectional connection with the communication bus through the IO module connector, receives the input quantity through the communication bus and outputs the output quantity to the switch; the output quantity comprises a remote control switching quantity command received by the bus and a switching quantity command output by the CPU module through the communication bus;
a power bus in the buses is connected with a power supply module, and power input ends of other modules are connected with the power bus;
the CPU module is used for phasor calculation, I/O processing and logic processing, adopts an SoC system-on-chip compact system architecture, comprises a processor system PS and a programmable logic PL, and performs data interaction between the processor system PS and the programmable logic PL by using an AXI communication interface;
the time setting module is connected with the CPU module and used for receiving a time setting signal of an external clock source;
the time keeping module is connected with the CPU module and used for keeping time synchronization when the standard clock signal is lost and providing an external B code time service interface.
2. The microsynchronous phasor measurement device for a power distribution network of claim 1, wherein: the micro synchronous phasor measurement device for the power distribution network further comprises a power supply module for providing power for the device, and a power output end of the power supply module is connected with power input ends of other modules.
3. The microsynchronous phasor measurement device for a power distribution network of claim 2, wherein: the power supply module comprises a voltage transformer and a power supply module, and the voltage transformer is connected with the power supply module.
4. The microsynchronous phasor measurement device for a power distribution network according to claim 3, wherein: the power supply module is connected with the lead-acid battery through the battery management module.
5. The microsynchronous phasor measurement device for a power distribution network of claim 1, wherein: the time synchronization module is realized by adopting GPS/BD dual-mode time synchronization or B code time synchronization.
6. The microsynchronous phasor measurement device for a power distribution network of claim 1, wherein: the time keeping module is connected with a constant temperature crystal oscillator arranged in the CPU module and provides an external B code time service interface through the CPU module.
7. The microsynchronous phasor measurement device for a power distribution network of claim 1, wherein: the micro synchronous phasor measurement device for the power distribution network selects at least one communication mode of optical fiber, a power wireless private network, a wireless public network or a 5G network to communicate with the master station or the PDC data concentrator.
8. The microsynchronous phasor measurement device for a power distribution network of claim 1, wherein: the safety certification module is connected with the communication bus through a safety certification module connector and used for carrying out safety certification on the remote control command analyzed by the communication bus and transmitting the signal after the safety certification to the CPU module through the communication bus for logic processing.
9. The microsynchronous phasor measurement device for a power distribution network of claim 1, wherein: the device also comprises a wireless communication module, and the wireless communication module is connected with the CPU module to realize wireless communication with other equipment.
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| CN111509717A (en) * | 2020-05-22 | 2020-08-07 | 广东电网有限责任公司广州供电局 | Synchronous phasor measurement control device and system for power distribution network |
| CN112214449A (en) * | 2020-09-09 | 2021-01-12 | 国网上海市电力公司 | Design method of power distribution network synchronous phasor device |
| CN112198395A (en) * | 2020-09-29 | 2021-01-08 | 国网河南省电力公司洛阳供电公司 | Synchronous data fault positioning system for power distribution network |
| CN112415940A (en) * | 2021-01-25 | 2021-02-26 | 杭州并坚科技有限公司 | Bus master controller, bus communication power supply system and communication power supply method thereof |
| CN113140101A (en) * | 2021-03-26 | 2021-07-20 | 青岛鼎信通讯股份有限公司 | Station electric energy acquisition terminal based on RS-485 bus |
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Application publication date: 20200103 |