CN216959432U - Wireless metering system suitable for medium and low voltage distribution network - Google Patents
Wireless metering system suitable for medium and low voltage distribution network Download PDFInfo
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- CN216959432U CN216959432U CN202221094760.XU CN202221094760U CN216959432U CN 216959432 U CN216959432 U CN 216959432U CN 202221094760 U CN202221094760 U CN 202221094760U CN 216959432 U CN216959432 U CN 216959432U
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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
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
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Abstract
The embodiment of the disclosure discloses a wireless measurement system suitable for medium and low voltage distribution network, the wireless measurement system suitable for medium and low voltage distribution network includes: the metering terminal is arranged at the gateway side and used for acquiring a voltage signal and a current signal and metering electric energy; and the current transformers are arranged on the node side and used for sending the current signals to the metering terminal in a wireless communication mode. According to the technical scheme, the current transformers are arranged at the plurality of nodes and transmit the induced current signals to the metering terminal on the gateway side in a wireless communication mode, and the metering terminal obtains the current signals and the voltage signals and then meters electric energy. The problem of current transformer in the current well low voltage distribution network pass through the mode transmission current signal of wiring, cause the circuit loaded down with trivial details is solved, the efficiency of installation and debugging has been improved, the cost of well low voltage distribution network later maintenance, transformation and dismantlement has been reduced.
Description
Technical Field
The application relates to the technical field of power distribution networks, in particular to a wireless metering system suitable for a medium and low voltage power distribution network.
Background
The medium and low voltage distribution network is a nerve ending of a power grid and directly faces to power consumers, and the electric energy borne by the medium and low voltage distribution network is closely related to the production life of the masses. In the prior art, a current transformer arranged at a measurement node is mainly used for transmitting a collected current signal to a terminal for electric energy metering. Because current transformer is the current signal who is gathered through the mode transmission of wiring, when the node that needs the measurement is too much, all carry out the wiring to the current transformer of every node and arrange, the circuit will be too loaded down with trivial details, the later stage is carried out the circuit and is maintained, reform transform and dismantle then need consume a large amount of efforts and material resources, not only influence the normal operating of each equipment, increase the unnecessary cost, still can cause a series of safety problems, the long-time power failure that the circuit was maintained, was caused among the transformation and the dismantlement process also can lead to extremely serious consequence.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems in the related art, the embodiment of the application provides a wireless metering system suitable for a medium and low voltage distribution network.
Specifically, the wireless metering system suitable for the medium and low voltage distribution network comprises:
the metering terminal is arranged at the gateway side and used for acquiring a voltage signal and a current signal and metering electric energy;
and the current transformers are arranged on the node side and used for sending the current signals to the metering terminal in a wireless communication mode.
Optionally, the metering terminal includes:
the metering module is used for metering electric energy according to the voltage signal and the current signal;
the voltage transformers are used for acquiring voltage signals and sending the voltage signals to the metering module;
the first communication module is used for sending timing signals to the plurality of current transformers so that the current transformers collect the current signals and the voltage transformers collect the voltage signals synchronously, and the received current signals are sent to the metering module.
Optionally, the current transformer comprises:
the current acquisition module is used for acquiring a current signal under the condition of receiving a control instruction;
the control module is used for sending the control instruction to the current acquisition module;
and the second communication module is used for receiving the timing signal and sending the timing signal to the control module so as to enable the control module to generate the control instruction and send the current signal to the metering terminal.
Optionally, the current collection module comprises: a CT module and an analog-to-digital conversion module.
Optionally, the current transformer further comprises: and a power management module.
Optionally, the power management module includes: a super capacitor and a battery.
Optionally, the current transformer further comprises: and the protection device is connected with the CT module.
Optionally, the control module is an MCU module.
Optionally, the sampling frequency of the current transformer and the voltage transformer is 60-100 points/cycle.
Optionally, the sampling frequency of the current transformer and the voltage transformer is 80 points/cycle.
The technical scheme provided by the embodiment of the application can have the following beneficial effects:
according to the wireless metering system suitable for the medium and low voltage power distribution network, the current transformers are arranged at the nodes, the current transformers transmit induced current signals to the metering terminals on the gateway side in a wireless communication mode, and the metering terminals perform electric energy metering after acquiring the current signals and the voltage signals. The problem of current transformer in the current well low voltage distribution network pass through the mode transmission current signal of wiring, cause the circuit loaded down with trivial details is solved, the efficiency of installation and debugging has been improved, the cost of well low voltage distribution network later maintenance, transformation and dismantlement has been reduced.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments when taken in conjunction with the accompanying drawings. In the drawings.
Fig. 1 shows a system architecture diagram of a wireless metering system suitable for a medium and low voltage distribution network according to an embodiment of the present application.
Fig. 2 shows a functional block diagram of a current transformer according to an embodiment of the present application.
Fig. 3 shows a schematic structural diagram of a current transformer according to an embodiment of the present application.
Detailed Description
Hereinafter, exemplary embodiments of the present application will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement them. Also, for the sake of clarity, parts not relevant to the description of the exemplary embodiments are omitted in the drawings.
The present application is made to solve, at least in part, the problems in the prior art that the inventors have discovered.
Fig. 1 shows a system architecture diagram of a wireless metering system suitable for a medium and low voltage distribution network according to an embodiment of the present application. As shown in fig. 1, the wireless metering system suitable for the medium and low voltage distribution network comprises a metering terminal 1 and a plurality of current transformers 2. The metering terminal 1 is arranged on the gateway side and used for acquiring a voltage signal, receiving a current signal sent by the current transformer 2 and then metering electric energy according to the voltage signal and the current signal. The current transformer 2 is arranged on the node side, interacts with the metering terminal 1 in a wireless communication mode, and sends the induced current signal to the metering terminal 1. The figure only schematically shows 3 nodes, namely a node a, a node b and a node c, and the current transformers 2 are respectively arranged on the nodes, and it can be understood that the nodes are adapted to the number of the current transformers, and do not form a limitation on the present application.
With continued reference to fig. 1, the metering terminal 1 includes a first communication module 11, a metering module 12, and a number of voltage transformers 13. The number of the voltage transformers 13 corresponds to that of the current transformers 2 one by one, 3 voltage transformers 13 are schematically shown in the figure, each voltage transformer 13 is used for collecting voltage signals of corresponding nodes and sending the voltage signals to the metering module 12, the first communication module 11 is used for sending timing signals to the current transformers 2, so that the current transformers 2 corresponding to the same node collect current signals and the voltage signals collected by the voltage transformers 13 are synchronous, the received current signals are sent to the metering module 12, and then the metering module 12 can measure electric energy according to the received voltage signals and the received current signals. Furthermore, the sampling frequency of the current transformer 2 and the voltage transformer 13 can be 60-100 points/cycle, for example, 80 points/cycle (1 cycle is 20 ms), the effective byte number transmitted per second is higher, the delay is small, the data transmission rate is high, the transmission is reliable, the signal aliasing in the sampling process is avoided, and the sampling precision is improved.
When signals are synchronously acquired, a terminal measurement signal is used as a reference signal, timing pulses are extracted, a timing signal is extracted every period, the rising edge of the timing signal triggers the first communication module 11, and a timing sequence is sent. And after the timing sequence is sent, immediately starting the current transformer 2, and sending the measured value to the current transformer 2 corresponding to each node when the timing signal is sent next time, so that the node side and the gateway side synchronously acquire signals. The method is generally short in synchronization distance and negligible in wireless transmission time, so that the data acquisition time of the node side and the data acquisition time of the gateway side can be kept synchronous, and the synchronization function is realized at low cost.
Fig. 2 illustrates a functional block diagram of a current transformer according to an embodiment of the present application. Fig. 3 shows a schematic structural diagram of a current transformer according to an embodiment of the present application.
As shown in fig. 2 and 3, the current transformer 2 includes a current collecting module 21, a control module 22, and a second communication module 23. The control module 22 may be an MCU or other single-chip microcomputer, which is not limited in this application. Specifically, the second communication module 23 receives the timing signal sent by the first communication module 11 and then sends the timing signal to the control module 22, so that the control module 22 generates a control instruction and sends the control instruction to the current collection module 21, the current collection module 21 collects a current signal after receiving the control instruction, and then the second communication module 23 sends the current signal to the metering terminal.
Further, the current collection module 21 includes a CT module and an Analog-to-Digital conversion module, the CT module is configured to sense a current signal of each node, and the Analog-to-Digital conversion module is an ADC (Analog-to-Digital Converter) module, performs data conversion on the current signal sensed by the CT module, and then sends the current signal to the metering terminal 1 through the second communication module 23.
Further, the current transformer 2 further includes a power management module 24. For example, when a hall current sensor or an electronic current transformer is used, the internal power management module 24 may include a super capacitor and a battery, which are mainly used for supplying power to other modules and performing level conversion.
Further, the current transformer 2 is also provided with a protection device, and the protection device is connected with the CT module to avoid the over-excitation of the current transformer and the burning loss of the current transformer.
Furthermore, a voltage detection device is arranged on a line for supplying power to the control module 22, and the voltage detection device protects the circuit to eliminate the influence of load fluctuation.
The application provides a be applicable to wireless measurement system's of well low voltage distribution network working process is: the method comprises the steps that a metering terminal is arranged on a gateway side, current transformers are respectively arranged on node sides, when a voltage transformer in the metering terminal collects voltage signals, a first communication module sends timing signals to the current transformers, a second communication module in the current transformers sends the timing signals to a control module after receiving the timing signals, the control module generates control instructions according to the control instructions to control current signals induced by a CT module, an analog-to-digital conversion module converts the current signals induced by the CT module and then sends the current signals to the first communication module of the metering terminal through the second communication module, synchronous collection of the voltage signals and the current signals is achieved, the metering module of the metering terminal receives the voltage signals collected by the voltage transformers and the current signals sent by the second communication module and then conducts electric energy metering, and information interaction with a master station is finally conducted.
The application provides a wireless measurement system suitable for medium and low voltage distribution network sets up current transformer through a plurality of nodes, and current transformer conveys the current signal of response to the measurement terminal of gateway side with wireless communication mode, and measurement terminal acquires and carries out the electric energy measurement behind current signal and the voltage signal. The problem of current transformer in the current well low voltage distribution network pass through the mode transmission current signal of wiring, cause the circuit loaded down with trivial details is solved, the efficiency of installation and debugging has been improved, the cost of well low voltage distribution network later maintenance, transformation and dismantlement has been reduced.
According to an embodiment of the application, the metering terminal comprises: the metering module is used for metering electric energy according to the voltage signal and the current signal; the voltage transformers are used for acquiring voltage signals and sending the voltage signals to the metering module; the first communication module is used for sending timing signals to the plurality of current transformers so that the current transformers collect the current signals and the voltage transformers collect the voltage signals synchronously, and the received current signals are sent to the metering module. By synchronously acquiring the current signal and the voltage signal, the metering error caused by sampling frequency spectrum leakage is avoided, and the electric energy metering is rapidly carried out.
According to an embodiment of the application, the current transformer comprises: the current acquisition module is used for acquiring a current signal under the condition of receiving a control instruction; the control module is used for sending the control instruction to the current acquisition module; and the second communication module is used for receiving the timing signal and sending the timing signal to the control module so as to enable the control module to generate the control instruction and send the current signal to the metering terminal. The current sensor realizes independent acquisition of current signals, and is smaller in size and more flexible in installation mode.
According to an embodiment of the application, the current collection module comprises: a CT module and an analog-to-digital conversion module. The data processing speed of the current acquisition module in the application is improved through the CT module and the analog-to-digital conversion module, the power consumption is low, and the requirement for high-precision measurement can be met.
According to an embodiment of the application, the current transformer further comprises: and a power management module. The power management module is the current transformer energy supply of this application for the system work of this application is more reliable.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (10)
1. The utility model provides a wireless measurement system suitable for medium and low voltage distribution network which characterized in that includes:
the metering terminal is arranged at the gateway side and used for acquiring a voltage signal and a current signal and metering electric energy;
and the current transformers are arranged on the node side and used for sending the current signals to the metering terminal in a wireless communication mode.
2. The system of claim 1, wherein the metering terminal comprises:
the metering module is used for metering electric energy according to the voltage signal and the current signal;
the voltage transformers are used for acquiring voltage signals and sending the voltage signals to the metering module;
the first communication module is used for sending timing signals to the plurality of current transformers so that the current transformers collect the current signals and the voltage transformers collect the voltage signals synchronously, and the received current signals are sent to the metering module.
3. The system of claim 2, wherein the current transformer comprises:
the current acquisition module is used for acquiring a current signal under the condition of receiving a control instruction;
the control module is used for sending the control instruction to the current acquisition module;
and the second communication module is used for receiving the timing signal and sending the timing signal to the control module so as to enable the control module to generate the control instruction and send the current signal to the metering terminal.
4. The system of claim 3, wherein the current collection module comprises: CT module and analog-to-digital conversion module.
5. The system of claim 3, wherein the current transformer further comprises: and a power management module.
6. The system of claim 5, wherein the power management module comprises: a super capacitor and a battery.
7. The system of claim 4, wherein the current transformer further comprises: and the protection device is connected with the CT module.
8. The system of claim 3, wherein the control module is an MCU module.
9. The system of claim 2, wherein the sampling frequency of the current transformer and the voltage transformer is 60-100 points/cycle.
10. The system of claim 8, wherein the sampling frequency of the current transformer and the voltage transformer is 80 points/cycle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221094760.XU CN216959432U (en) | 2022-05-09 | 2022-05-09 | Wireless metering system suitable for medium and low voltage distribution network |
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| CN202221094760.XU CN216959432U (en) | 2022-05-09 | 2022-05-09 | Wireless metering system suitable for medium and low voltage distribution network |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114994404A (en) * | 2022-07-28 | 2022-09-02 | 北京智芯半导体科技有限公司 | Apparatus, system, method, device, and medium for multi-node power metering |
| CN115032449A (en) * | 2022-08-10 | 2022-09-09 | 北京智芯半导体科技有限公司 | Electric energy metering method and device, electronic equipment, chip and readable storage medium |
-
2022
- 2022-05-09 CN CN202221094760.XU patent/CN216959432U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114994404A (en) * | 2022-07-28 | 2022-09-02 | 北京智芯半导体科技有限公司 | Apparatus, system, method, device, and medium for multi-node power metering |
| CN115032449A (en) * | 2022-08-10 | 2022-09-09 | 北京智芯半导体科技有限公司 | Electric energy metering method and device, electronic equipment, chip and readable storage medium |
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