A phase recognition method for smart meters based on wireless communication

Abstract

The application provides a kind of smart meter phase recognition method based on wireless communication, it is related to electric power system technical field, the concentrator module detects when A phase passes zero point, its time data is collected, and its time data is converted into binary data, simultaneously, the concentrator module is transmitted into analysis module after the binary data of conversion, simultaneously, smart meter module is installed on the phase of grid three-phase electricity, when smart meter module detects the zero-crossing signal of the phase, its time data is collected, and its time data is converted into binary data, simultaneously, the binary data of smart meter module is transmitted into analysis module, by converting time data into binary data transmission, it can improve the detection of error, effectively improve the reliability and efficiency of data transmission, simultaneously, it can also simplify data processing process, reduces the complexity of data processing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power systems, and particularly relates to a smart meter phase recognition method based on wireless communication. BACKGROUND

[0002] With the rise of smart grids, smart meters, as the core components of advanced metering infrastructure, are becoming increasingly common. Compared with traditional mechanical or electronic meters, smart meters have more functions and significant advantages, can automatically record and transmit user's power usage, do not need manual meter reading, reduce labor costs and meter reading errors. Smart meter phase recognition is an important part of smart grid management, which is crucial to ensure the stable operation of the power system and improve energy utilization efficiency.

[0003] The existing phase detection method of the existing smart meter needs to be carried out by the existing voltage detection method, which determines the phase by measuring the voltage of each phase. In a three-phase alternating current circuit, the smart meter measures the voltage of each phase by using a voltage transformer or a voltage sensor, records the peak value of the voltage and the phase angle, and then transmits it to the computer of the staff. Through the calculation module and processing center in the computer, the transmitted data is calculated to determine the installation phase of the smart meter. However, the existing data transmission basically adopts coded data for transmission. The original data is edited into a plurality of digit letters for transmission in order to facilitate subsequent data accuracy determination. However, the use of coded data for transmission leads to a reduction in transmission efficiency due to the complex coding. At the same time, the coded data is more susceptible to interference during transmission, which is more likely to cause errors in the transmitted data.

[0004] Therefore, it is necessary to provide a new smart meter phase recognition method based on wireless communication to solve the above technical problems. SUMMARY

[0005] To solve the above technical problems, the present application provides a smart meter phase recognition method based on wireless communication.

[0006] The smart meter phase recognition method based on wireless communication provided by the present application comprises:

[0007] Step one, data collection, the concentrator module is connected with A phase, B phase and C phase of three-phase electricity respectively, when the concentrator module detects that A phase passes zero point, it collects time data and converts it into binary data, at the same time, the concentrator module transmits the converted binary data to the analysis module, at the same time, the smart meter module is installed on a certain phase of three-phase electricity, when the smart meter module detects the zero-crossing signal of the phase, it collects time data and converts it into binary data, at the same time, the smart meter module transmits the binary data to the analysis module;

[0008] Step two, data processing, the analysis module receives the binary data transmitted by the concentrator module and the smart meter module, the analysis module calculates and analyzes two groups of binary data, and transmits two groups of calculation results to the processing center;

[0009] Step three, data judgment, after the processing center receives the two groups of calculation results transmitted by the analysis module, if both groups of data results are zero, it is determined to be passed, the processing center issues a transmission instruction to the concentrator module and the smart meter module, so that the concentrator module and the smart meter module respectively transmit binary data to the calculation module;

[0010] Step four, phase judgment, after the calculation module receives the binary data transmitted by the concentrator module and the smart meter module, the calculation module converts two groups of binary data into time data, and calculates two groups of time data, the calculation module calculates the phase of three-phase electricity where the smart meter module is installed according to the calculation results and the internal set judgment condition.

[0011] Preferably, when the concentrator module detects that A phase passes zero point, the concentrator module regards the time when A phase passes zero point as time data, the concentrator module converts the time data into data B through binary conversion, and then introduces data B into C=B 17 +B 2 +1, then the concentrator module appends the calculated data C to the end of data B, so that E=B+C, then the concentrator module transmits data E and data C to the analysis module.

[0012] Preferably, when the smart meter module detects the zero-crossing signal of the phase, the smart meter module regards the time when it detects the zero-crossing signal of the phase as time data, the smart meter module converts the time data into data G through binary conversion, and then introduces G into H=G 17 +G 2 +1, then the smart meter module appends the calculated data H to the end of data G, so that K=G+H, then the concentrator module transmits data K and data H to the analysis module.

[0013] Preferably, the analysis module receives the data E and the data C sent by the calculator module, and then calculates E / C and transmits the calculation result to the processing center. Meanwhile, the analysis module receives the data K and the data H sent by the smart meter module, and then calculates K / H and transmits the calculation result to the processing center.

[0014] Preferably, the processing center receives the results of E / C and K / H transmitted by the analysis module, and determines that the installation is correct if both results are zero. The processing center then sends a transmission instruction to the concentrator module and the smart meter module, so that the concentrator module and the smart meter module transmit the data E, the data C, the data K and the data H to the calculation module. Meanwhile, the processing center causes the concentrator module and the smart meter module to delete the collected data. If the results of E / C and K / H are not all zero, the processing center causes the module corresponding to the non-zero data to re-convert the identified zero point in time into binary and re-import the calculation, and transmits the result to the analysis module for re-determination. The analysis module then transmits the result of the secondary determination to the processing center. If the installation is correct, the processing center sends an instruction to the concentrator module and the smart meter module, so that the concentrator module and the smart meter module transmit the data E, the data C, the data K and the data H to the calculation module. Meanwhile, the processing center causes the concentrator module and the smart meter module to delete the collected data. If the installation is not correct again, the processing center sends information to the staff, so that the staff maintains the module corresponding to the incorrect installation.

[0015] Preferably, the calculation module receives the data E and the data C transmitted by the concentrator module, and then calculates data X by subtracting the tail number of the data E from the data C. The calculation module converts the data X into the time of the identified phase zero point transmitted by the concentrator module in binary. The calculation module receives the data K and the data H transmitted by the smart meter module, and then calculates data Y by subtracting the tail number of the data K from the data H. The calculation module converts the data Y into the time of the identified phase zero point transmitted by the smart meter module in binary.

[0016] Preferably, the calculation module calculates the time of the identified phase zero point of the concentrator module and the time of the identified phase zero point of the smart meter module. If the time of the identified phase zero point of the concentrator module is equal to the time of the identified phase zero point of the smart meter module, it is determined that the smart meter module is installed in phase A. If the time of the identified phase zero point of the smart meter module is delayed by T / 3 through the zero point than the time of the identified phase zero point of the concentrator module, it is determined that the smart meter module is installed in phase B. If the time of the identified phase zero point of the smart meter module is delayed by T / 6 through the zero point than the time of the identified phase zero point of the concentrator module, it is determined that the smart meter module is installed in phase C. The calculation module transmits the determination result to the processing center.

[0017] Compared with the related art, the smart electric meter phase recognition method based on wireless communication has the following beneficial effects:

[0018] 1、The concentrator module detects that the A phase passes through zero point, acquires time data, and converts the time data into binary data, and the concentrator module transmits the converted binary data to the analysis module, and the smart electric meter module is installed on a certain phase of the three-phase power grid, and when the smart electric meter module detects the zero-crossing signal of the phase, acquires time data, and converts the time data into binary data, and the smart electric meter module transmits the binary data to the analysis module, the analysis module receives the binary data transmitted by the concentrator module and the smart electric meter module, the analysis module calculates and analyzes two groups of binary data, and transmits the two groups of calculation results to the processing center, and after the processing center receives the two groups of calculation results transmitted by the analysis module, if the two groups of data results are both zero, it is determined to be passed, the time data is converted into binary data for data transmission, which can improve the error detection efficiency, reduce the interference of binary data transmission, effectively improve the reliability and efficiency of data transmission, and simplify the data processing process, reduce the complexity of data processing, and the analysis module calculates and analyzes the data transmitted by the concentrator module and the smart electric meter module, instead of digit comparison of the data transmitted by the concentrator module and the smart electric meter module, which simplifies the data processing process and improves the processing efficiency of the data transmitted by the concentrator module and the smart electric meter module.

[0019] 2、The concentrator module converts the time data into data B through binary conversion, and imports data B into C=B17+B2+1, then the concentrator module appends the calculated data C to the end of data B, so that E=B+C, then the concentrator module transmits data E and data C to the analysis module, and the smart electric meter module converts the time data into data G through binary conversion, and imports G into H=G 17 +G 2 +1, then the smart electric meter module appends the calculated data H to the end of data G, so that K=G+H, then the concentrator module transmits data K and data H to the analysis module, the analysis module receives data E and data C sent by the calculator module, and the analysis module calculates E / C and transmits the calculation result to the processing center, and after the analysis module receives data K and data H sent by the smart electric meter module, the analysis module calculates K / H and transmits the calculation result to the processing center, the analysis module does not need to compare the data by digit, which effectively simplifies the data processing process, reduces the system complexity, and also speeds up the data processing speed.

[0020] 3, The application calculates the time of identifying the phase zero point of the concentrator module and the time of identifying the phase zero point of the smart meter module through the calculation module, if the time of identifying the phase zero point of the concentrator module is equal to the time of identifying the phase zero point of the smart meter module, it is determined that the smart meter module is installed in phase A, if the time of identifying the phase zero point of the smart meter module is delayed T / 3 through the zero point than the time of identifying the phase zero point of the concentrator module, it is determined that the smart meter module is installed in phase B, if the time of identifying the phase zero point of the smart meter module is delayed T / 6 through the zero point than the time of identifying the phase zero point of the concentrator module, it is determined that the smart meter module is installed in phase C, through the calculation mechanism, the accuracy of phase determination is effectively ensured, the data processing problem caused by phase error is effectively prevented, the stability and reliability of the system are improved, the process of phase determination is simplified, the intelligent level of the smart grid system is improved to a certain extent, and strong technical support is provided for the operation of the smart grid. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The flow chart of the smart meter phase identification method based on wireless communication provided by the application is shown in

[0022] Figure 2 The system block diagram of the smart meter phase identification method based on wireless communication provided by the application is shown in

[0023] Figure 3 The operating principle diagram of the smart meter phase identification method based on wireless communication provided by the application is shown in DETAILED DESCRIPTION

[0024] The application will be further described below in combination with the drawings and embodiments.

[0025] Please refer to Figure 1 , Figure 2 and Figure 3 , wherein Figure 1 The flow chart of the smart meter phase identification method based on wireless communication provided by the application is shown in Figure 2 The system block diagram of the smart meter phase identification method based on wireless communication provided by the application is shown in Figure 3 The operating principle diagram of the smart meter phase identification method based on wireless communication provided by the application is shown in

[0026] In the specific implementation process, as shown in Figure 1 , Figure 2 and Figure 3 , a smart meter phase identification method based on wireless communication includes

[0027] Step one, data collection, concentrator module is installed on the three-phase power grid, the concentrator module is connected with the three-phase A, B and C, when the concentrator module detects A phase through zero point, the time data is collected, and the time data is converted into binary data B, the concentrator module calculates and encodes the binary data B, calculates the data E and data C, the concentrator module transmits the data E and data C to the analysis module, at the same time, the smart meter module installed in a phase of the three-phase power grid detects the zero crossing signal of the phase, collects the time data, and converts the time data into binary data G, the smart meter module calculates and encodes the binary data G, calculates the data K and data H, and transmits the data K and data H to the analysis module

[0028] Step two, data processing, the analysis module receives the data E and data C sent by the calculator module, and the analysis module calculates the data E and data C, and transmits the calculation structure to the processing center, at the same time, the analysis module receives the data K and data H sent by the smart meter module, and the analysis module calculates the data K and data H, and transmits the calculation results to the processing center

[0029] Step three, data determination, the processing center receives the calculation results of data E and data C and the calculation results of data K and data H transmitted by the analysis module, if the two groups of data results are all zero, it is determined to pass, the processing center issues transmission instructions to the concentrator module and the smart meter module, so that the concentrator module and the smart meter module respectively transmit the data E, data C, data K and data H to the calculation module, and the processing center makes the concentrator module and the smart meter module delete the collected data

[0030] If the results of data E and data C and the results of data K and data H are all or one of them are not zero, the processing center makes the module corresponding to the non-zero data reconvert the zero position time point recognized by it into binary, and reimports calculation, and transmits the results to the analysis module for re-determination, the analysis module then transmits the results of secondary determination to the processing center, if the determination is passed, the processing center issues instructions to make the concentrator module and the smart meter module transmit the data E, data C, data K and data H to the calculation module, and the processing center makes the concentrator module and the smart meter module delete the collected data, if the determination is not passed again, the processing center sends information to the staff, so that the staff maintains the module corresponding to the determination not passed

[0031] Step four, phase determination, after receiving the data E and data C transmitted by the concentrator module, the calculation module calculates the data X through the data E and data C, the calculation module calculates the time of identifying the phase zero point transmitted by the concentrator module through the data X, after receiving the K and H data transmitted by the smart meter module, the calculation module calculates the data Y through K and H, the calculation module calculates the time of identifying the phase zero point transmitted by the smart meter module through the data Y, the calculation module calculates the time of identifying the phase zero point of the concentrator module and the time of identifying the phase zero point of the smart meter module, and the calculation module judges the calculation result of the time of identifying the phase zero point of the concentrator module and the time of identifying the phase zero point of the smart meter module through the internal setting of the judgment condition, if the time of identifying the phase zero point of the concentrator module is equal to the time of identifying the phase zero point of the smart meter module, it is determined that the smart meter module is installed in A phase, if the time of identifying the phase zero point of the smart meter module is delayed T / 3 through zero point than the time of identifying the phase zero point of the concentrator module, it is determined that the smart meter module is installed in B phase, if the time of identifying the phase zero point of the smart meter module is delayed T / 6 through zero point than the time of identifying the phase zero point of the concentrator module, it is determined that the smart meter module is installed in C phase, and the calculation module transmits the judgment result to the processing center;

[0032] When the concentrator module detects that A phase passes through zero point, the concentrator module regards the time of A phase passing through zero point as time data, the concentrator module converts the time data into data B through binary, and introduces data B into C=B 17 +B 2 +1, then the concentrator module appends the calculated data C to the end of data B, so that E=B+C, and then the concentrator module transmits data E and data C to the analysis module;

[0033] After detecting the zero-crossing signal of the phase where the smart meter module is located, the smart meter module transmits the time of detecting the zero-crossing signal of the phase where the smart meter module is located as time data, the smart meter module converts the time data into data G through binary, and introduces G into H=G 17 +G 2 +1, then the concentrator module appends the calculated data C to the end of data B, so that E=B+C, and then the concentrator module transmits data E and data C to the analysis module;

[0034] The phase zero point refers to a special point of the AC voltage waveform, which marks the position where a complete cycle begins or ends. Specifically, it refers to the point where the voltage waveform changes from negative to positive or from positive to negative. Since AC is periodic, there are two phase zero points in each cycle: one is the zero-crossing point from negative to positive, and the other is the zero-crossing point from positive to negative.

[0035] The analysis module receives the data E and the data C sent by the calculator module, and calculates E / C, and transmits the calculation result to the processing center. Meanwhile, the analysis module receives the data K and the data H sent by the smart meter module, and calculates K / H, and transmits the calculation result to the processing center.

[0036] The processing center receives the results of E / C and K / H transmitted by the analysis module. If both sets of data results are zero, it is determined to be passed. The processing center issues a transmission instruction to the concentrator module and the smart meter module, so that the concentrator module and the smart meter module transmit the data E, the data C, the data K and the data H to the calculation module, and at the same time, the processing center makes the concentrator module and the smart meter module delete the collected data. If the results of E / C and K / H are not all or one of them, the processing center makes the module corresponding to the non-zero data re-convert the zero position time point it identifies into binary, and re-imports calculation, and transmits the result to the analysis module for re-determination. The analysis module then transmits the result of the secondary determination to the processing center. If it is determined to be passed, the processing center issues an instruction to make the concentrator module and the smart meter module transmit the data E, the data C, the data K and the data H to the calculation module, and at the same time, the processing center makes the concentrator module and the smart meter module delete the collected data. If it is determined to be not passed again, the processing center sends information to the staff, so that the staff maintains the module corresponding to the determination not passed.

[0037] After receiving the data E and the data C transmitted by the concentrator module, the calculation module obtains the data X by subtracting the tail number of the data E from the data C. The calculation module converts the data X into the time of the phase zero point identified by the concentrator module through binary. After receiving the data K and the data H transmitted by the smart meter module, the calculation module obtains the data Y by subtracting the tail number of the data K from the data H. The calculation module converts the data Y into the time of the phase zero point identified by the smart meter module through binary.

[0038] The calculation module calculates the time of the phase zero point identified by the concentrator module and the time of the phase zero point identified by the smart meter module. If the time of the phase zero point identified by the concentrator module is equal to the time of the phase zero point identified by the smart meter module, it is determined that the smart meter module is installed in phase A. If the time of the phase zero point identified by the smart meter module is delayed by T / 3 through the zero point than the time of the phase zero point identified by the concentrator module, it is determined that the smart meter module is installed in phase B. If the time of the phase zero point identified by the smart meter module is delayed by T / 6 through the zero point than the time of the phase zero point identified by the concentrator module, it is determined that the smart meter module is installed in phase C. The calculation module transmits the determination result to the processing center.

[0039] The AC cycle of China is 50HZ, so each cycle is T=1 / 50=0.02 seconds, when the A phase is zero, the C phase is zero after T / 6 time, and the B phase is zero after T / 3 time.

[0040] The circuit and control involved in the present application are prior art, and will not be described in detail here.

[0041] The above is only an embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent flow transformation using the content of the present application specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A wireless communication-based phase identification method for a smart meter, characterized in that, Comprise: Step one, data collection, make concentrator module respectively with three-phase electric A phase, B phase and C phase connection, when the concentrator module detects A phase through zero point, collect its time data, and its time data is converted into binary data, at the same time, the concentrator module transmits the converted binary data to the analysis module, at the same time, the smart meter module is installed on a certain phase of the power grid three-phase electric, when the smart meter module detects the zero-crossing signal of the phase, it collects the time data and converts it into binary data, at the same time, the smart meter module transmits the binary data to the analysis module, wherein the concentrator module detects A phase through zero point, the concentrator module calls the time of A phase through zero point as time data, the concentrator module converts the time data into data B through binary, and the data B is introduced into C=B 17 +B 2 +1, then the concentrator module appends the calculated data C to the end of data B, so that E=B+C, then the concentrator module transmits data E and data C to the analysis module; Step two, data processing, analysis module receives the binary data transmitted by the concentrator module and the smart meter module, the analysis module calculates and analyzes two sets of binary data, and transmits the two sets of calculation results to the processing center; Step three, data judgment, after the processing center receives the two sets of calculation results transmitted by the analysis module, if both sets of data results are zero, it is determined to pass, and the processing center issues a transmission instruction to the concentrator module and the smart meter module, so that the concentrator module and the smart meter module respectively transmit binary data to the calculation module; Step four, phase judgment, after the calculation module receives the binary data transmitted by the concentrator module and the smart meter module, the calculation module converts the two sets of binary data into time data, and calculates the two sets of time data. The calculation module calculates the three-phase phase of the smart meter module according to the calculation results of the internal set judgment condition.

2. The method of claim 1, wherein the method further comprises: The smart meter module detects the zero-crossing signal of the phase, and the smart meter module transmits the time of the zero-crossing signal of the phase as time data. The smart meter module converts the time data into data G through binary conversion, and imports G into H=G 17 +G 2 +1. Then the smart meter module appends the calculated data H to the end of data G, so that K=G+H. Then the concentrator module transmits data K and data H to the analysis module.

3. The method of claim 2, wherein the method further comprises: After the analysis module receives the data E and the data C sent by the calculator module, the analysis module calculates E / C and transmits the calculation result to the processing center. At the same time, after the analysis module receives the data K and the data H sent by the smart meter module, the analysis module calculates K / H and transmits the calculation result to the processing center.

4. The method of claim 3, wherein the method further comprises: The processing center receives the results of E / C and K / H transmitted by the analysis module. If both sets of data results are zero, it is determined to pass, and the processing center issues a transmission instruction to the concentrator module and the smart meter module, so that the concentrator module and the smart meter module transmit data E, data C, data K and data H to the calculation module. At the same time, the processing center makes the concentrator module and the smart meter module delete the collected data. If the results of E / C and K / H are not all or one of them, the processing center makes the module corresponding to the non-zero data reconvert the zero position time point identified by it into binary and reimport calculation, and transmits the result to the analysis module for rejudgment. The analysis module then transmits the result of the second judgment to the processing center. If it is determined to pass, the processing center issues an instruction to make the concentrator module and the smart meter module transmit data E, data C, data K and H to the calculation module. At the same time, the processing center makes the concentrator module and the smart meter module delete the collected data. If it is determined not to pass again, the processing center sends information to the staff to make the staff maintain the module corresponding to the determination not to pass.

5. The method of claim 4, wherein the method further comprises: After the calculation module receives the data E and the data C transmitted by the concentrator module, the calculation module obtains data X by subtracting the mantissa of data E from data C. The calculation module converts data X into the time of identifying the phase zero point transmitted by the concentrator module through binary. After the calculation module receives the data K and the data H transmitted by the smart meter module, the calculation module obtains data Y by subtracting the mantissa of data K from data H. The calculation module converts data Y into the time of identifying the phase zero point transmitted by the smart meter module through binary.

6. The method of claim 5, wherein the method further comprises: The calculation module calculates the time of identifying the phase zero point of the concentrator module and the time of identifying the phase zero point of the smart meter module, if the time of identifying the phase zero point of the concentrator module is equal to the time of identifying the phase zero point of the smart meter module, it is determined that the smart meter module is installed in phase A, if the time of identifying the phase zero point of the smart meter module is delayed by T / 3 from the time of identifying the phase zero point of the concentrator module, it is determined that the smart meter module is installed in phase B, if the time of identifying the phase zero point of the smart meter module is delayed by T / 6 from the time of identifying the phase zero point of the concentrator module, it is determined that the smart meter module is installed in phase C, and the calculation module transmits the determination result to the processing center; wherein each period T=1 / M second, and M is the frequency of alternating current cycle.

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