CN113049865A - Power parameter detection device and method - Google Patents
Power parameter detection device and method Download PDFInfo
- Publication number
- CN113049865A CN113049865A CN201911367624.6A CN201911367624A CN113049865A CN 113049865 A CN113049865 A CN 113049865A CN 201911367624 A CN201911367624 A CN 201911367624A CN 113049865 A CN113049865 A CN 113049865A
- Authority
- CN
- China
- Prior art keywords
- voltage
- current
- acquisition module
- time synchronization
- load
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims description 8
- 238000005070 sampling Methods 0.000 claims abstract description 74
- 238000004891 communication Methods 0.000 claims abstract description 20
- 238000009434 installation Methods 0.000 abstract description 6
- 238000012360 testing method Methods 0.000 abstract description 3
- 230000001360 synchronised effect Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000001976 improved effect Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention provides an electric power parameter detection device which comprises a voltage acquisition module, one or more current acquisition modules and a communication bus, wherein the voltage acquisition module is used for sampling voltage signals of a power supply line and sending voltage sampling data packets comprising time synchronization information and the voltage signals to the current acquisition module, the current acquisition module carries out time synchronization according to the voltage sampling data packets, acquires current signals on a load after the time synchronization, and calculates electric power parameters of the load according to the voltage signals and the current signals. The invention divides the existing voltage acquisition and current acquisition which are integrated into a whole into two independent functional modules, and the modules synchronize the sampling data and transmit the sampling data through a communication line. Therefore, the volume of the electric meter can be remarkably reduced; the voltage test wire that every check point all must be connected when saving former ammeter installation has reduced the wire rod in a large number and has consumed to can shorten the installation engineering time by a wide margin.
Description
Technical Field
The invention relates to the technical field of electricity, in particular to a power parameter detection device and method.
Background
With the development of social economy, resources become in short supply, and energy conservation becomes more important. More and more power consumption units need to monitor the power consumption situation more accurately so as to reasonably distribute power resources and achieve the purpose of energy conservation. Therefore, a large number of power parameter detection devices need to be newly or additionally installed.
In the conventional power parameter measurement, a voltage signal and a current signal are simultaneously sampled at a measurement point, so that various power parameters are calculated. Therefore, each measuring device needs to be connected with voltage and current signals, and for occasions where the measuring devices are intensively and intensively installed, a large amount of materials are consumed, time and labor are wasted, and the construction difficulty is high
Disclosure of Invention
The invention aims to provide a power parameter detection device to solve the problems that the existing electricity meters with the same functions occupy a large amount of installation space and consume a large amount of manpower and material resources for installation and wiring due to large size, complex wiring and the like.
The embodiment of the invention provides.
In the power parameter detection device provided by the invention, the current acquisition module comprises a time synchronization unit, a sampling unit and a calculation unit,
the time synchronization unit carries out time synchronization according to the sampling cycle period of the voltage acquisition module and the time synchronization error between the current acquisition module and the voltage acquisition module;
the sampling unit is used for collecting current signals on the load after time synchronization;
the calculating unit is used for calculating the power parameter of the load according to the voltage signal and the current signal.
In the power parameter detection device provided by the invention, the number of the current collection modules is the same as that of the loads.
The power parameter detection device provided by the invention further comprises a current transformer, and the current acquisition module is connected to the load through the current transformer.
In the power parameter detection device provided by the invention, the communication bus comprises a sampling synchronization bus and a data communication bus.
The invention also provides a power parameter detection method, which comprises the following steps:
the voltage acquisition module samples voltage signals of a power supply line and sends voltage sampling data packets including time synchronization information and the voltage signals to the current acquisition module;
time synchronization is carried out by the current acquisition module according to the voltage sampling data packet;
and after time synchronization, a current signal on the load is acquired by a current acquisition module, and the power parameter of the load is calculated according to the voltage signal and the current signal.
In the power parameter detection method provided by the invention, in the step of time synchronization of the current acquisition module according to the voltage sampling data packet, time synchronization is carried out according to the sampling cycle period of the voltage acquisition module and the time synchronization error between the current acquisition module and the voltage acquisition module.
The embodiment of the invention has the following beneficial effects: according to the electric power parameter detection device provided by the invention, the existing voltage acquisition and current acquisition integrated into a whole are separated into two independent functional modules, and the modules are used for synchronizing sampling data and transmitting the sampling data through a communication line. The two modules have the same volume, and the single-point detection can realize the same function as the original electric meter only by interconnecting one voltage acquisition module and one current acquisition module, so that the volume of the electric meter can be obviously reduced. When a plurality of electric loads on the same group of power supply line are detected, the detection requirements can be met only by interconnecting one voltage acquisition module and the current acquisition modules with the same number as the electric loads, so that the voltage test line which is required to be connected at each detection point when the original electric meter is installed is saved, the consumption of wires is greatly reduced, and the installation and construction time can be greatly shortened.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic wiring diagram of an electrical parameter detection apparatus according to an embodiment of the present invention;
fig. 2 is a schematic flow chart illustrating a method for detecting a power parameter according to an embodiment of the invention.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Exemplary embodiments of the invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It is noted that the terms "equal," "same," "simultaneously," or other similar terms are not limited to the absolute equality or equality in mathematical terms, but may be similar in engineering sense or within an acceptable error range when practicing the claims of this patent. The term "coupled" or "connecting" is intended to encompass not only the direct connection of two entities, but also the indirect connection via other entities with beneficial and improved effects. The term "and/or" includes a combination of a plurality of related items and one of the plurality of related items.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
In order to better understand the technical solution of the present invention, the technical solution of the present invention will be described in detail below with reference to the drawings and the specific embodiments in the specification, and it should be understood that the embodiments and the specific features in the embodiments of the present invention are detailed descriptions of the technical solution of the present application, and are not limited to the technical solution of the present application, and the technical features in the embodiments and the examples of the present invention may be combined with each other without conflict.
Fig. 1 is a schematic wiring diagram of an electrical parameter detection apparatus according to an embodiment of the present invention. As shown in fig. 1, the power parameter detection device provided by the present invention is connected between a power supply line and a load to detect a power consumption parameter of the load. The power parameter detection device of the present invention includes:
the voltage acquisition module 10 is used for sampling voltage signals of a power supply line, and the sampled voltage signals are transmitted to all current acquisition modules on a bus through a high-speed communication bus; the voltage acquisition module transmits each sampling data to each current acquisition module in real time through a high-speed communication bus, and the sampling data packet also comprises time synchronization information which is used for time synchronization of all the current acquisition modules and the voltage acquisition modules on the line;
one or more current acquisition modules 20, performing time synchronization according to the voltage sampling data packet, and sampling current signals of each load line after the time synchronization; the current acquisition module calculates various current parameters of each load circuit according to the acquired current signal data; calculating power parameters such as power, electric energy and the like of each load circuit by combining voltage sampling data transmitted by the voltage acquisition module;
a communication bus 30, which comprises two groups of high-speed check asynchronous communication buses, wherein one group is specially used for transmitting voltage sampling data and time synchronization of each module on the bus, and the other group is used for transmitting measurement results and working parameters among the modules (using a Modbus-RTU communication protocol); the clock rate of the high-speed bus is not lower than 1MHz, so that the time synchronization error among the acquisition modules can be ensured to be less than 5us, and the synchronous sampling requirement of the power frequency signal can be completely met.
Specifically, in an embodiment of the present invention, the number of the current collecting modules 20 is the same as the number of the loads. For the detection of a single point (a three-phase power load), the same function as the original electric meter can be realized only by interconnecting one voltage acquisition module and one current acquisition module; when a plurality of electric loads on the same group of power supply lines are detected, the detection requirements can be met only by interconnecting one voltage acquisition module and the current acquisition modules with the same number as the electric loads (three-phase electric loads).
Specifically, in an embodiment of the present invention, a current transformer 40 is further included. The current collection module 20 is connected to the load through the current transformer 40.
Specifically, in an embodiment of the present invention, the voltage acquisition module transmits each sampling data to each current acquisition module in real time through the high-speed communication bus, and the sampling data packet further includes time synchronization information for time synchronization between all the current acquisition modules and the voltage acquisition modules on the line. After the time synchronization is stable, the voltage sampling value is equal to voltage sampling data sampled at the current sampling point, and various power parameters of the load can be calculated by combining the current sampling data.
Further, in an embodiment of the present invention, the current collecting module 20 includes a time synchronizing unit, a sampling unit and a calculating unit, and the time synchronizing unit performs time synchronization according to a sampling cycle period of the voltage collecting module and a time synchronization error between the current collecting module and the voltage collecting module; the sampling unit is used for collecting current signals on the load after time synchronization; the calculating unit is used for calculating the power parameter of the load according to the voltage signal and the current signal.
The electric power parameter detection device provided by the invention separates the existing voltage acquisition and current acquisition integrated into a whole into two independent functional modules, and the modules synchronize sampling data and transmit the sampling data through communication lines. The two modules have the same volume, and the single-point detection can realize the same function as the original electric meter only by interconnecting one voltage acquisition module and one current acquisition module, so that the volume of the electric meter can be obviously reduced. When a plurality of electric loads on the same group of power supply line are detected, the detection requirements can be met only by interconnecting one voltage acquisition module and the current acquisition modules with the same number as the electric loads, so that the voltage test line which is required to be connected at each detection point when the original electric meter is installed is saved, the consumption of wires is greatly reduced, and the installation and construction time can be greatly shortened.
Fig. 2 is a schematic flow chart illustrating a method for detecting a power parameter according to an embodiment of the invention. As shown in fig. 2, the method for detecting power parameters provided by the present invention is characterized by comprising the following steps:
step S1, a voltage signal of a power supply line is sampled by a voltage acquisition module, and a voltage sampling data packet comprising time synchronization information and the voltage signal is sent to a current acquisition module;
step S2, the current acquisition module carries out time synchronization according to the voltage sampling data packet;
and step S3, after time synchronization, collecting a current signal on the load by a current collecting module, and calculating the power parameter of the load according to the voltage signal and the current signal.
Specifically, in an embodiment of the present invention, the time synchronization unit uses the voltage acquisition module as a master station, all the current acquisition modules as slave stations, and the time of the voltage acquisition module is a time reference of the system, and is not synchronized with the real time. The voltage acquisition module numbers voltage sampling data (which can make the sampling data combination of single-phase voltage or multi-phase voltage) obtained by sampling the voltage sampling module at the time of the whole second to be 0, and sequentially increases the number of the voltage sampling data until the next sampling value at the time of the whole second, so that the cycle is performed. In step S2, time synchronization is performed according to the sampling cycle period of the voltage acquisition module and the time synchronization error between the current acquisition module and the voltage acquisition module. Calculating the sampling cycle period of the voltage acquisition module and the time synchronization error between the current acquisition module and the voltage acquisition module by the following steps: .
And step S21, the voltage acquisition module adds serial numbers to the voltage sampling data obtained by each sampling and sends the voltage sampling data to the current acquisition module on the bus. Each sampling value data packet with the number of 0 additionally carries time information, and the time information is the time of the message sending time and is marked as T0 (voltage acquisition module time).
Step S22, after the current collection module receives the voltage sampling data packet numbered 0, the current collection module stores the sampling data and records the time t0 of the receiving time (the time of the current collection module). Because a plurality of current collection modules are connected to the bus, in order to avoid communication conflict, after receiving a voltage sampling data packet with the same number as the own modbus communication address (marked as a), the current collection module sends time t0 recorded when receiving the data packet with the number of 0 to the voltage collection module, and the sent data also contains the time of sending time (marked as t1, the time of the current collection module) and the number a of the data packet (the modbus communication address of the current collection module).
And S23, after the voltage acquisition module receives the response information of the current module, storing corresponding data, and recording the time of receiving the data packet as T1.
And step S24, in a new sampling cycle, the voltage acquisition module sends the data packet in the step S21, and at the moment, the current module a records the time t2 of the data packet receiving moment.
And step S25, the voltage acquisition module adds time information T1 to the voltage sampling data packet with the number of a in the new sampling cycle and sends the voltage sampling data packet to the current acquisition module a.
Step S26, the current collection module a receives the sampling data packet with number a, stores the sampling data and records the time of receiving the sampling data packet as t 3. So far, the current acquisition module records the time T0, T1, T0, T1, T2 and T3. Therefore, the sampling cycle period Ts of the voltage acquisition module can be calculated to be t 2-t 0; the data packet transmission delay td between the voltage acquisition module and the current acquisition module a is [ (T1-T0) - (T1-T0) ]/2; and the time synchronization error tds between the current acquisition module a and the voltage acquisition module is T0-td-T0.
Furthermore, the current acquisition module can adjust the sampling cycle period of the voltage acquisition module to be consistent with that of the voltage acquisition module according to the sampling cycle period Ts of the voltage acquisition module; according to the time synchronization error tds, the self time can be adjusted to be synchronous with the voltage acquisition module. After the time synchronization is completed, the voltage acquisition module and the current acquisition module take the whole second as a sampling starting point according to the same agreed sampling frequency, and then the synchronous sampling of the voltage signal and the current signal can be realized.
The above detailed description is provided for the power parameter detection device provided by the present invention, and the principle and the implementation of the present invention are explained by applying specific examples, and the description of the above examples is only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (7)
1. The utility model provides an electric power parameter detection device, connects between power supply line and load, its characterized in that, includes voltage acquisition module, one or more current acquisition module and communication bus, one or more current acquisition module pass through communication bus communication connect in voltage acquisition module, voltage acquisition module is used for the sampling the voltage signal of power supply line will include time synchronization information and voltage signal's voltage sampling data package send to current acquisition module, current acquisition module basis voltage sampling data package carries out time synchronization to after time synchronization, gather the current signal on the load, the basis voltage signal with the electric power parameter of load is calculated to the current signal.
2. The power parameter detection device according to claim 1, wherein the current collection module includes a time synchronization unit, a sampling unit, and a calculation unit,
the time synchronization unit carries out time synchronization according to the sampling cycle period of the voltage acquisition module and the time synchronization error between the current acquisition module and the voltage acquisition module;
the sampling unit is used for collecting current signals on the load after time synchronization;
the calculating unit is used for calculating the power parameter of the load according to the voltage signal and the current signal.
3. The electrical parameter detection device of claim 1, wherein the number of current collection modules is the same as the number of loads.
4. The electrical parameter detection device of claim 1, further comprising a current transformer through which the current collection module is connected to the load.
5. The power parameter detection device of claim 1, wherein the communication bus comprises a sample synchronization bus and a data communication bus.
6. A power parameter detection method for a power parameter detection apparatus according to claims 1 to 5, characterized by comprising the steps of:
the voltage acquisition module samples voltage signals of a power supply line and sends voltage sampling data packets including time synchronization information and the voltage signals to the current acquisition module;
time synchronization is carried out by the current acquisition module according to the voltage sampling data packet;
and after time synchronization, a current signal on the load is acquired by a current acquisition module, and the power parameter of the load is calculated according to the voltage signal and the current signal.
7. The method according to claim 6, wherein in the step of performing time synchronization by the current collection module according to the voltage sampling data packet, the time synchronization is performed according to a sampling cycle period of the voltage collection module and a time synchronization error between the current collection module and the voltage collection module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911367624.6A CN113049865A (en) | 2019-12-26 | 2019-12-26 | Power parameter detection device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911367624.6A CN113049865A (en) | 2019-12-26 | 2019-12-26 | Power parameter detection device and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113049865A true CN113049865A (en) | 2021-06-29 |
Family
ID=76505610
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911367624.6A Pending CN113049865A (en) | 2019-12-26 | 2019-12-26 | Power parameter detection device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113049865A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114156738A (en) * | 2021-12-06 | 2022-03-08 | 石家庄嘉硕电子技术有限公司 | Distributed parameter acquisition system for low-voltage power distribution cabinet |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104698320A (en) * | 2015-03-23 | 2015-06-10 | 济南大学 | On-line measuring device and method for electrical parameters of power transmission and distribution line |
| CN109541361A (en) * | 2018-12-28 | 2019-03-29 | 深圳供电局有限公司 | A kind of public affairs low pressure side branch's load heavy duty prior-warning device and method |
| CN110068740A (en) * | 2019-05-22 | 2019-07-30 | 大连民族大学 | A kind of more Electric Power Parameter Detections |
| CN110231512A (en) * | 2019-07-04 | 2019-09-13 | 深圳曼顿科技有限公司 | Single firewire electric energy metering device |
-
2019
- 2019-12-26 CN CN201911367624.6A patent/CN113049865A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104698320A (en) * | 2015-03-23 | 2015-06-10 | 济南大学 | On-line measuring device and method for electrical parameters of power transmission and distribution line |
| CN109541361A (en) * | 2018-12-28 | 2019-03-29 | 深圳供电局有限公司 | A kind of public affairs low pressure side branch's load heavy duty prior-warning device and method |
| CN110068740A (en) * | 2019-05-22 | 2019-07-30 | 大连民族大学 | A kind of more Electric Power Parameter Detections |
| CN110231512A (en) * | 2019-07-04 | 2019-09-13 | 深圳曼顿科技有限公司 | Single firewire electric energy metering device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114156738A (en) * | 2021-12-06 | 2022-03-08 | 石家庄嘉硕电子技术有限公司 | Distributed parameter acquisition system for low-voltage power distribution cabinet |
| CN114156738B (en) * | 2021-12-06 | 2024-04-12 | 石家庄嘉硕电子技术有限公司 | Distributed parameter acquisition system for low-voltage power distribution cabinet |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102623966B (en) | Differential protection method for bus | |
| CN201438201U (en) | Secondary loop circuit voltage drop synchronous detection device for voltage mutual inductor | |
| WO2013010447A1 (en) | Carrier communication test device | |
| CN109617628B (en) | Multifunctional detection device and method for multi-meter-in-one acquisition equipment | |
| CN101576743A (en) | Distributed ring main unit monitor terminal | |
| CN101951024B (en) | Digital data acquisition device | |
| CN201402286Y (en) | Voltage drop detecting device of secondary circuit of voltage transformer | |
| CN102539916A (en) | Synchronous phasor measuring device of ship electrical power system | |
| CN107727910B (en) | Synchronous collection system of transformer substation's electric current based on passive electronic transformer | |
| CN105572516A (en) | Multifunctional FPGA acquisition unit with time reference output | |
| CN103575971A (en) | Intelligent substation universal data collection method | |
| CN103178987A (en) | Digital transformer substation distribution testing method based on ZigBee wireless technology | |
| CN208421081U (en) | Wireless on-load vector test instrument | |
| CN102298099A (en) | Power distribution and consumption monitoring and measuring apparatus possessing time calibration function | |
| CN201402293Y (en) | Distributed wireless insulation live testing system for high-voltage equipment | |
| CN201402287Y (en) | Voltage drop detecting device of secondary circuit of voltage transformer | |
| CN113049865A (en) | Power parameter detection device and method | |
| CN202084168U (en) | Energy consumption data acquisition device | |
| CN103151835B (en) | Sampling synchronization method and device of distributed DTU (Distribution Terminal Unit) | |
| CN205404700U (en) | Take multi -functional FPGA acquisition unit of time reference output | |
| CN204613347U (en) | A kind of compartment traveling wave ranging device | |
| CN201145944Y (en) | Network modularization electric power tolerance monitoring device | |
| CN204631193U (en) | A kind of separate type low voltage failure cable identification device | |
| CN203055150U (en) | Power consumption information data repeater | |
| CN209387803U (en) | A kind of partial discharge monitoring system with self-checking function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |