CN116345697B - Low-voltage station area system - Google Patents
Low-voltage station area system Download PDFInfo
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- CN116345697B CN116345697B CN202310612404.5A CN202310612404A CN116345697B CN 116345697 B CN116345697 B CN 116345697B CN 202310612404 A CN202310612404 A CN 202310612404A CN 116345697 B CN116345697 B CN 116345697B
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- 238000004891 communication Methods 0.000 claims description 11
- 230000008569 process Effects 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
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- 125000004122 cyclic group Chemical group 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
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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
- H02J13/00006—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 characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00007—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 characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using the power network as support for the transmission
- H02J13/00009—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 characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using the power network as support for the transmission using pulsed signals
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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
- H02J13/00006—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 characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00022—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 characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using wireless data transmission
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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
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00034—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving an electric power substation
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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
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
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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
- H02J2213/00—Indexing scheme relating to details of circuit arrangements for providing remote indication of network conditions of for circuit arrangements for providing remote control of switching means in a power distribution network
- H02J2213/10—Indexing scheme relating to details of circuit arrangements for providing remote indication of network conditions of for circuit arrangements for providing remote control of switching means in a power distribution network using simultaneously two or more different transmission means
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
- H04W84/22—Self-organising networks, e.g. ad-hoc networks or sensor networks with access to wired networks
Abstract
The application relates to a low-voltage station system, which comprises station equipment, switch equipment and carrier equipment, wherein the carrier equipment is sequentially connected to form a ring shape, and the switch equipment of the same type is connected; the platform region equipment is used for outputting acquisition instructions; the carrier equipment is used for outputting a current pulse signal and an identification signal when being used as the 1 st carrier equipment which receives the acquisition instruction, and outputting a prompt signal when receiving the identification signal; when the carrier device is used as an N-th carrier device which receives the acquisition command, the current pulse signal and the identification signal are output at the same time when the acquisition command and the identification signal are received; the switching device is used for outputting a synchronous signal when being used as the 1 st switching device which receives the current pulse signal, demodulating and transmitting the switching signal when receiving the prompting signal, and receiving and transmitting the synchronous signal and transmitting the switching signal when being used as the N th switching device which receives the current pulse signal. The method and the device can facilitate the realization of more accurate identification of the topological relation of the low-voltage transformer area.
Description
Technical Field
The application relates to the technical field of power distribution automation of power systems, in particular to a low-voltage transformer area system.
Background
The low-voltage transformer area system can support intelligent monitoring work of transformer area distribution, automatically report faults, realize fault positioning and fault analysis according to transformer area topology, realize line loss fine analysis and improve the power quality, power supply reliability and automation level of a power distribution transformer area.
Generally, the method for acquiring the topology of the low-voltage area adopted at present is as follows: the communication modules are configured for the transformer, the switch equipment and the carrier equipment, and the connection relation among the communication modules on the transformer, the switch equipment and the carrier equipment is identified, so that the topological relation among the transformer, the switch equipment and the carrier equipment is determined. Wherein the carrier equipment is an ammeter box. Specifically, the station area device sends an acquisition instruction to the switch device and the carrier device through the power line. After receiving the acquisition instruction, the carrier equipment generates a current pulse signal near the zero crossing point of the alternating current, and the modulated current pulse signal carries equipment information of the carrier equipment and is output through a power line. And when the switching equipment receives the acquisition instruction and the current pulse signal, demodulating the current pulse signal to obtain equipment information of the carrier equipment. After that, the switching device packages its device information together with the device information of the carrier device into a HRF packet, and sends it to the zone device or other switching devices. Finally, the station area equipment can receive the equipment information of all carrier equipment and the equipment information of the switch equipment, so that the identification of the topological relation is realized.
With respect to the related art in the above, the inventors consider that in the process of topology recognition, since the connection relationship among the carrier device, the switching device, and the zone device is unknown, the number of carrier devices to which each switching device is connected is also unknown. Moreover, the switching device needs to receive and demodulate the device signals of all the carrier devices and then send out the switching signals, so that when the switching device receives and demodulates the current pulse signals sent by the carrier devices, it is difficult to determine whether the switching device receives the current pulse signals sent by all the carrier devices before demodulation, and therefore the problem that the identified topological relation is inaccurate is caused.
Disclosure of Invention
In order to facilitate the realization of more accurate identification of the topological relation of the low-voltage area, the application provides a low-voltage area system.
The application provides a low-voltage station area system, adopts following technical scheme:
the low-voltage station area system comprises station area equipment, a plurality of switch equipment and a plurality of carrier equipment, wherein the station area equipment is connected with the plurality of switch equipment through a power line, each switch equipment is connected with the plurality of carrier equipment through the power line, the carrier equipment is sequentially connected in a communication way to form a ring, the two connected carrier equipment are in one-way communication, and the switch equipment of the same type are connected in a communication way;
the platform area equipment is used for outputting acquisition instructions;
the carrier equipment is used for outputting a current pulse signal and an identification signal carrying equipment information when being used as the 1 st carrier equipment which receives the acquisition instruction, and outputting a prompt signal when receiving the identification signals sent by other carrier equipment; when the carrier equipment is used as the Nth carrier equipment which receives the acquisition instruction, the current pulse signal and the identification signal which carry equipment information are output when the acquisition instruction and the identification signals sent by other carrier equipment are received, wherein N is not equal to 1;
the switch device is used for outputting a synchronous signal to all switch devices of the same type when being used as the 1 st switch device which receives the current pulse signal, synchronizing the prompt signal to all switch devices of the same type when receiving the prompt signal, demodulating all received current pulse signals and sending the switch signal to the platform area device or other switch devices, wherein the switch signal is a signal carrying the device information of the carrier device and the device information of the switch device; and the switching device is used for receiving and forwarding the synchronous signal to all carrier devices connected with the M-th switching device when the M-th switching device receives the current pulse signal, demodulating all received current pulse signals when the prompting signal is received, and sending the switching signal to the area device or other switching devices to send the switching signal to the area device, wherein M is not equal to 1.
Through adopting above-mentioned technical scheme, through connecting all carrier equipment with passing through wireless for form cyclic annular structure between the carrier equipment, and, set up carrier equipment to when receiving the identification signal that gathers instruction and other carrier equipment sent, output current pulse signal and identification signal, make when all carrier equipment all output current pulse signal, the switching equipment can receive the prompt signal, in order to begin demodulating current pulse signal. At this time, the topology of the low-voltage area is determined more precisely.
Optionally, the carrier device is further configured to:
and when the carrier equipment receives the identification signals sent by other carrier equipment, judging whether the current pulse signals are sent or not, and if so, outputting the identification signals.
By adopting the technical scheme, in the process that the switching device receives the current pulse signal and outputs the synchronous signal to other switching devices, the situation that the individual carrier devices also receive the acquisition command is likely to occur, and the carrier devices upload the current pulse signal to the corresponding switching devices. The carrier devices can receive the identification signal after uploading the current pulse signal, and can accurately analyze and obtain the topological structure of the low-voltage station area by judging whether the carrier devices send the overcurrent pulse signal or not and outputting the identification signal after determining that the overcurrent pulse signal is sent.
Optionally, the carrier device is further configured to:
after receiving the acquisition instruction and before sending the current pulse signal, sending an application;
if the application passes, a current pulse signal is sent;
the switching device is further configured to:
if the application is received for the first time, passing the application;
if the carrier equipment for sending the application has received the acquisition instruction and the identification signal at the same time, the application is passed;
otherwise, the application is not passed.
By adopting the technical scheme, the interaction between the carrier equipment and the switch equipment can be utilized, and the situation that the individual carrier equipment also receives the acquisition instruction in the process that the switch equipment receives the current pulse signal and outputs the synchronous signal to other switch equipment can be effectively avoided.
Optionally, the switching device is further configured to determine whether the switching device receives the application for the first time, and the method includes:
each switch device outputs a request signal to other switch devices when receiving the application for the first time;
acquiring response signals fed back by each switching device;
and judging whether the received application is the application received for the first time in all the switch devices of the same type according to all the received response signals.
By adopting the technical scheme, when the switch equipment receives the application for the first time, whether the application received by the switch equipment is the application received by all the switch equipment for the first time can be determined.
Optionally, the switching device is further configured to:
if the application is not received, the response signal presents a first state;
if the application is received, the response signal presents a second state.
By adopting the technical scheme, when all response signals are in the first state, the application received by the switch equipment is indicated to be the application received by all switch equipment for the first time, otherwise, if any response signal is in the second state, the application received by the switch equipment is indicated to be the application received by all switch equipment for the first time.
Optionally, the carrier device is further configured to:
when the identification signal is received, judging whether the identification signal and the current pulse signal are sent out, if yes, the carrier equipment is the 1 st carrier equipment which receives the acquisition instruction, and if not, the carrier equipment is not the 1 st carrier equipment which receives the acquisition instruction.
Optionally, the carrier devices communicate wirelessly.
Optionally, the switching device is further configured to:
after receiving the alert signal, no carrier signal is received over the power line.
By adopting the technical scheme, after the switch equipment receives the prompt signal, the resources consumed by processing the redundant carrier signals can be reduced.
In summary, the present application includes at least one of the following beneficial technical effects:
the carrier devices are connected through wireless connection, so that a ring structure is formed among the carrier devices, and the carrier devices are arranged to output current pulse signals and identification signals when receiving acquisition instructions and the identification signals sent by other carrier devices, so that when all the carrier devices output the current pulse signals, the switch device can receive prompt signals to start demodulating the current pulse signals. At this time, the topology of the low-voltage area is determined more precisely.
Drawings
Fig. 1 is a system schematic diagram of a low-voltage station system according to an embodiment of the present application.
Reference numerals illustrate: 1. a zone device; 2. a switching device; 3. carrier equipment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to fig. 1 and the embodiment. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
It can be appreciated that in the power distribution network, the premise of realizing the functions of intelligent monitoring work of the area distribution, automatic fault reporting, fault positioning, fault analysis and line loss fine analysis is the known area topology structure. However, in the daily power distribution operation and maintenance management work, there are often cases where the connection relationship of the users is unclear, especially for newly built areas.
Compared with the related art, the low-voltage station area system provided by the application can be convenient for realizing more accurate identification of the topological structure of the low-voltage station area.
Referring to fig. 1, in the present application, a low-voltage zone system can facilitate identifying a topological relationship of a zone. The low voltage zone system comprises a zone device 1, a plurality of switching devices 2 and a plurality of carrier devices 3. Wherein the station area device 1 is respectively connected with a plurality of switch devices 2 through a power line, and each switch device 2 is respectively connected with a plurality of carrier devices 3 through the power line.
The platform area device 1 is used for outputting acquisition instructions. The acquisition instruction is used for triggering the carrier device 3 to upload own device information.
The carrier device 3 is installed in each household and is used for collecting the real-time electric quantity of each household. And the carrier devices 3 are in turn communicatively connected. For example, in a specific example, the first carrier device 3 is communicatively connected to the second carrier device 3, the second carrier device 3 is communicatively connected to the third carrier device 3, … …, the m-1 st carrier device 3 is communicatively connected to the m-th carrier device 3, the m-th carrier device 3 is communicatively connected to the first carrier device 3, and unidirectional transmission between two connected carrier devices 3 can be implemented, so that a ring-like structure is formed between all carrier devices 3, and thus it is convenient to grasp the state in which each carrier device 3 transmits a current pulse signal. Specifically, the first carrier device 3 can transmit a signal to the second carrier device 3, and the second carrier device 3 can receive only the signal and can transmit the signal to the third carrier device 3.
It is noted that the power line transmission is considered to be characterized in that when a certain node outputs a signal, all nodes connected to the node will receive the signal, which may cause unnecessary interference to all carrier devices 3 waiting for the acquisition of instructions. Therefore, in the present application, it is preferable that all the carrier devices 3 are connected to each other by wireless communication.
It will be appreciated that in actual use, the carrier devices 3 to which one station is connected are typically located within the same range, e.g. within the same cell. At this time, in order to ensure that two carrier devices 3 arbitrarily connected can normally communicate, the positions and the number of wireless repeaters may be determined within the range according to the range size.
Further, each carrier device 3 is configured to output a current pulse signal and an identification signal carrying device information when the 1 st carrier device 3 receives the acquisition command, and output a prompt signal when the identification signal sent by the other carrier device 3 is received, and output the current pulse signal and the identification signal when the nth carrier device 3 receives the acquisition command and the identification signal sent by the other carrier device 3. Wherein N is not equal to 1.
It should be noted that, when the station device 1 outputs the acquisition command, since the sum of the length of the power line connected to each carrier device 3 and the corresponding switch device 2 and the length of the power line connected to the switch device 2 and the corresponding station device 1 is different, the time for receiving the acquisition command by the different carrier devices 3 is also different. Therefore, one carrier device 3 among the plurality of carrier devices 3 always receives the acquisition instruction first and outputs a current pulse signal carrying device information. Specifically, when the carrier device 3 is the 1 st carrier device 3 that receives the acquisition instruction, the carrier device 3 can generate a large-current pulse signal in the vicinity of the zero-crossing point of the alternating current. Since the station area device 1 mainly collects the device information of each carrier device 3 and the switch device 2 in the process of identifying the topological relation, each carrier device 3 receives the collection instruction at different time and does not influence the identification of the topological relation.
Further, as the 1 st carrier device 3 which receives the acquisition instruction, it is possible to output the identification signal in addition to the current pulse signal when the acquisition instruction is received. Wherein the identification signal may be any form of signal. In the present application, the identification signal is matched with the carrier devices 3 which are sequentially connected in communication, so that the status of each carrier device 3 can be grasped conveniently. Specifically, as the nth carrier device 3 that receives the acquisition instruction, the current pulse signal and the identification signal are output when the acquisition instruction and the identification signal transmitted by the other carrier device 3 are received at the same time. For ease of understanding, the actual implementation will be described in detail herein as an example.
When the 1 st carrier device 3 receives the acquisition instruction, the carrier device 3 outputs a current pulse signal and an identification signal at the same time. Wherein the current pulse signal is transmitted to the switching device 2 connected to the carrier device 3 via a power line, and the identification signal is transmitted to the next carrier device 3 connected to the carrier device 3 via wireless. It should be noted that, because the lengths of the power lines from each carrier device 3 to the station device 1 are different, some carrier devices 3 receive the identification signal first and then receive the acquisition command, and some carrier devices 3 receive the acquisition command first and then receive the identification signal. Only when the carrier device 3 which is in communication connection with the 1 st carrier device 3 which receives the acquisition instruction and the identification signal at the same time, the carrier device 3 can output the current pulse signal and the identification signal. And so on, so that all carrier devices 3 can sequentially output current pulse signals in the order of sequential connection. And outputting a current pulse signal and an identification signal until the last carrier device 3 receives the acquisition command and the identification signal at the same time. The current pulse signal is sent to the switching device 2 connected with the carrier device 3 through a power line, and the identification signal is transmitted to the 1 st carrier device 3 which receives the acquisition command through wireless transmission. When the 1 st carrier device 3, which receives the acquisition order, receives the identification signal, it is stated that all carrier devices 3 have transmitted current pulse signals to the switching devices 2 connected to them. At this time, the 1 st carrier device 3 that receives the acquisition instruction outputs a prompt signal, so that all the switch devices 2 package the device information of all the carrier devices 3 obtained by demodulation and the respective device information to form a switch signal, and transmit the switch signal to the station device 1.
It should be noted that, since the number of carrier devices 3 is uncertain in this process, each carrier device 3 needs to identify whether or not it is the 1 st device that receives the acquisition instruction. For this reason, each carrier device 3 needs to determine whether or not the respective identification signal and current pulse signal have been issued upon receiving the identification signal output from the other carrier device 3. When the carrier device 3 has sent out the identification signal and the current pulse signal, it is indicated that the carrier device 3 is the 1 st carrier device 3 that receives the acquisition command. On the contrary, when the carrier device 3 has not sent the identification signal and the current pulse signal, it indicates that the carrier device 3 has not received the acquisition command, that is, the carrier device 3 is not the 1 st carrier device 3 that has received the acquisition command. In order to achieve the above functions, all the carrier devices 3 may be respectively configured with a PLC chip, an MCU chip, or a microprocessor chip.
Further, the switching device 2 is configured to output a synchronization signal to all the switching devices 2 of the same type when the switching device 2 that is the 1 st switching device that receives the current pulse signal, synchronize the prompting signal to all the switching devices 2 of the same type when the prompting signal is received, demodulate all the received current pulse signals, and send the switching signals to the station device 1 or other switching devices 2. For receiving and forwarding the synchronization signal to all carrier devices 3 when the switching device 2 receives the current pulse signal as the mth, demodulating all the received current pulse signals when the prompting signal is received, and sending the switching signal to the station device 1 or other switching devices 2. Wherein m+.1, the switching signal is a signal carrying the device information of the carrier device 3 and the device information of the switching device 2.
It can be appreciated that in the low-voltage district system, the switching devices 2 are classified into various types, such as a switching box, a branch box, and the like. In particular, the same type of switching devices 2 are located in the same location in the low voltage bay system. In one example, the transformer is connected to a plurality of switch boxes, each of the switch boxes is connected to a plurality of branch boxes, and each of the branch boxes is connected to a plurality of electricity meter boxes. Of course, it is also possible that the transformer is directly connected to one branch box, which is connected to a plurality of electricity meter boxes, respectively. In order to ensure that, when all carrier devices 3 transmit current pulse signals to the switching devices 2 connected thereto, the switching devices 2 of the same type can simultaneously package the respective demodulated device signals and their own device information to form switching signals, the switching devices 2 of the same type are also communicatively connected, i.e. between the switching devices 2 directly connected to all carrier devices 3. The specific working process is that when a certain switching device 2 connected with the carrier device 3 receives a prompt signal, the prompt signal is synchronized to all the switching devices 2 of the same type, so that the switching devices 2 of the same type can demodulate all the received current pulse signals. Of course, in other embodiments, the switching device 2 directly connected to the carrier device 3 may also demodulate it each time a current pulse signal is received. When each switching device 2 completes the demodulation operation, the switching signals carrying the device information of the carrier device 3 and the respective device information can be uploaded. Since the switching device 2 directly connected to the carrier device 3 is not necessarily directly connected to the zone device 1, the switching signal may be uploaded to the zone device 1, or may be forwarded to and uploaded to the zone device 1 by other types of switching devices 2.
Similarly, since it is not certain which carrier device 3 can become the 1 st carrier device 3 that received the acquisition command when the topology of the low-voltage station is acquired, the chip having the processing function in each carrier device 3 is configured with a program capable of realizing all the functions described above, and when the 1 st current pulse signal is received by the switching device 2, all the carrier devices 3 can execute the respective corresponding programs. For this reason, when the 1 st current pulse signal is received by the switching device 2, the switching device 2 outputs a synchronization signal to all of the same type of switching devices 2 to enable the same type of switching devices 2 to transmit signals to all of the carrier devices 3 to cause all of the carrier devices 3 to start executing the respective programs.
Considering that when the topology of the low-voltage area is actually acquired, there may be a case where a plurality of carrier devices 3 have already received the acquisition command before a certain switching device 2 receives the 1 st current pulse signal. In order to avoid that the above situation affects the implementation of the above functions, the present application also provides two solutions.
Specifically, in the first manner, all carrier devices 3 are further configured with the following functions: when the carrier devices 3 receive the identification signals transmitted by the other carrier devices 3, it is determined whether or not the respective overcurrent pulse signals have been transmitted. When the carrier device 3 has transmitted the over-current pulse signal, it means that the carrier device 3 has transmitted the current pulse signal before the switching device 2 receives the 1 st current pulse signal, and at this time, the identification signal is directly output. In this manner, since the 1 st carrier device 3 that receives the acquisition command can still receive the identification signal and output the prompt signal to inform the switching device 2 that all the carrier devices 3 have output the current pulse signals, the order in which the individual carrier devices 3 output the current pulse signals is disordered, but the implementation of the above functions is not affected.
The second way is that an interaction procedure is provided between all carrier devices 3 and all switching devices 2. Specifically, after the carrier device 3 receives the acquisition instruction, and before the current pulse signal is transmitted, it is necessary to transmit an application to the switching device 2 connected thereto. When the application passes, the carrier device 3 is able to send a current pulse signal. Conversely, when the application is not passed, the carrier device 3 cannot transmit a current pulse signal. Accordingly, an algorithm is also provided in the switching device 2, specifically, if the switching device 2 receives the application 1 st time, the application is passed. If the carrier device 3 that sent the application has received both the acquisition command and the identification signal, then the application is passed. Otherwise, the application is not passed. Further, since a plurality of carrier devices 3 are connected to each of the switching devices 2, when an application is first received by the switching device 2, the application may be the application first received by all the switching devices 2, or may not be the application first received by all the switching devices 2. For this reason, it is also necessary to determine whether or not the application received for the first time by each switching device 2 is the application received for the first time by all switching devices 2. Specifically, each switching device 2 outputs a request signal to other switching devices 2 when receiving the application for the first time, so as to obtain a response signal fed back by each switching device 2. When the switching device 2 receives the request signal, the switching device 2 feeds back a response signal according to the condition that the application is currently received. In a specific example, if the switching device 2 does not receive any application when receiving the request signal, the output response signal assumes the first state, and if the switching device 2 receives the application before receiving the request signal, the output response signal assumes the second state. In this application, the first state and the second state are only used to distinguish between the two states of the reply signal, and in different embodiments, the first state and the second state may take different forms. For example, the first state may be a high level signal and the second state may be a low level signal. After the switching device 2 acquires all the response signals, it is determined whether the received application is the first received application in all the switching devices 2 of the same type according to all the response signals. If all the response signals are in the first state, the application received by the switch device 2 is indicated to be the application received by all the switch devices 2 for the first time, otherwise, if any response signal is in the second state, the application received by the switch device 2 is indicated to be the application received by all the switch devices 2 for the first time.
In the present application, all switching devices 2 are also provided with chips having processing functions.
This allows the carrier device 3, the switching device 2 and the zone device 1 to receive the redundant interference signals in view of the fact that the carrier signal is transmitted over the power line between the carrier device 3, the switching device 2 and the zone device 1. For this reason, the switching device 2, upon receiving the alert signal, needs to turn off its function of receiving the external signal, i.e. not receiving any carrier signal transmitted over the power line any more.
The implementation principle of the low-voltage station area system in the embodiment of the application is as follows: by connecting all the carrier devices 3 by wireless, a loop structure is formed between the carrier devices 3, and the carrier devices 3 are arranged to output a current pulse signal and an identification signal when receiving a collection instruction and the identification signals transmitted by other carrier devices 3, so that when all the carrier devices 3 output the current pulse signal, the switch device 2 can receive a prompt signal to start demodulating the current pulse signal. At this time, the topology of the low-voltage area is determined more precisely.
The foregoing description of the preferred embodiments of the present application is not intended to limit the scope of the application, in which any feature disclosed in this specification (including abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. That is, each feature is one example only of a generic series of equivalent or similar features, unless expressly stated otherwise.
Claims (8)
1. The low-voltage station area system comprises station area equipment (1), a plurality of switch equipment (2) and a plurality of carrier equipment (3), wherein the station area equipment (1) is connected with the plurality of switch equipment (2) through a power line, each switch equipment (2) is connected with the plurality of carrier equipment (3) through the power line, and the low-voltage station area system is characterized in that the carrier equipment (3) are sequentially connected in a communication way to form a ring, the two connected carrier equipment (3) are in one-way communication, and the switch equipment (2) of the same type are in communication connection;
the platform area equipment (1) is used for outputting acquisition instructions;
the carrier equipment (3) is used for outputting a current pulse signal and an identification signal carrying equipment information when the carrier equipment (3) which is the 1 st carrier equipment receives the acquisition instruction, and outputting a prompt signal when the identification signal sent by other carrier equipment (3) is received; when the carrier equipment (3) which is used as the Nth carrier equipment receives the acquisition instruction, the current pulse signal and the identification signal which carry equipment information are output when the acquisition instruction and the identification signals sent by other carrier equipment (3) are received, wherein N is not equal to 1;
the switch device (2) is used for outputting a synchronous signal to all switch devices (2) of the same type when the switch device (2) which is the 1 st switch device receives a current pulse signal, synchronizing the prompt signal to all switch devices (2) of the same type when the prompt signal is received, demodulating all received current pulse signals and sending the switch signal to the platform device (1) or other switch devices (2), wherein the switch signal is a signal carrying the device information of the carrier device (3) and the device information of the switch device (2); for receiving and forwarding the synchronization signal to all carrier devices (3) connected to the mth switching device (2) receiving the current pulse signal, demodulating all received current pulse signals and transmitting the switching signal to the zone device (1) or other switching devices (2) to transmit the switching signal to the zone device (1) when the prompting signal is received, wherein M is equal to 1.
2. The low voltage district system according to claim 1, wherein: the carrier device (3) is further configured to:
and the carrier equipment (3) judges whether an overcurrent pulse signal is sent or not when receiving the identification signals sent by other carrier equipment (3), and if so, the carrier equipment outputs the identification signals.
3. The low voltage district system according to claim 1, wherein: the carrier device (3) is further configured to:
after receiving the acquisition instruction and before sending the current pulse signal, sending an application;
if the application passes, a current pulse signal is sent;
the switching device (2) is further configured to:
if the application is received for the first time, passing the application;
if the carrier equipment (3) for sending the application has received the acquisition instruction and the identification signal at the same time, the application is passed;
otherwise, the application is not passed.
4. A low voltage district system according to claim 3, characterized in that: the switching device (2) is further configured such that the method for determining whether the switching device has received an application for the first time comprises:
each switching device (2) outputs a request signal to other switching devices (2) when receiving the application for the first time;
acquiring response signals fed back by the switching devices (2);
and judging whether the received application is the first received application in all the switch devices (2) of the same type according to all the received response signals.
5. The low voltage district system according to claim 4, wherein: the switching device (2) is further configured to:
if the application is not received, the response signal presents a first state;
if the application is received, the response signal presents a second state.
6. The low voltage district system according to claim 2 or 5, characterized in that: the carrier device (3) is further configured to:
when the identification signal is received, judging whether the identification signal and the current pulse signal are sent out, if yes, the carrier device (3) is the 1 st carrier device (3) which receives the acquisition instruction, and if not, the carrier device (3) is not the 1 st carrier device (3) which receives the acquisition instruction.
7. The low voltage district system according to claim 6, wherein: the carrier devices (3) communicate with each other in a wireless manner.
8. The low voltage district system according to claim 7, wherein: the switching device (2) is further configured to:
after receiving the alert signal, no carrier signal is received over the power line.
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| CN202310612404.5A CN116345697B (en) | 2023-05-29 | 2023-05-29 | Low-voltage station area system |
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