A phase identification method based on HPLC Bluetooth communication system

Abstract

The present invention relates to the technical field of power transmission and communication, and discloses a phase identification method based on an HPLC Bluetooth communication system, wherein the HPLC Bluetooth communication system comprises an HPLC Bluetooth dual-mode module and a slave Bluetooth module; wherein the HPLC Bluetooth dual-mode module comprises a carrier module and a master Bluetooth module; the HPLC Bluetooth dual-mode module is installed on an electric energy meter or an intelligent circuit breaker, and the slave Bluetooth module is installed on electric power equipment, such as an electric energy meter, an intelligent circuit breaker, etc. The present invention solves the problem of automatic phase identification of a slave Bluetooth device in an HPLC Bluetooth communication system, helps to improve the level of three-phase imbalance and line loss sharing management of a distribution network, is of great significance to improving power supply reliability, and can be widely applied to the field of power transmission and communication.

Description

Technical Field

[0001] The present invention relates to the technical field of power transmission communication, and in particular to a phase identification method based on an HPLC Bluetooth communication system. Background Art

[0002] With the gradual promotion and application of advanced technologies such as information and communication, traditional power grids have begun to transform into digital power grids, especially low-voltage power distribution and measurement, which are rapidly developing in the direction of the power Internet of Things. At the power communication level, power carriers, as the most basic communication method for data collection in low-voltage substations, are currently beginning to transition from narrowband carriers to broadband carriers to meet the needs of upper-layer services for big data collection. In addition, Bluetooth technology is also gradually being applied in low-voltage substations. For example, IoT meters, meter box locks, micro-circuits behind meters, meter boxes, some sensor devices in distribution rooms, and even user electrical appliances all have Bluetooth communication solutions. The combination of HPLC and Bluetooth communication can realize monitoring and collection of substation environment and data, and user electrical equipment.

[0003] In 2019, State Grid released the "HPLC Technical Application Manual V2.7", which clarified the requirements for phase topology identification and its significance for refined management of substations. The combination of existing HPLC Bluetooth communication solutions can realize the collection of Bluetooth device information, but cannot identify the phase information of slave Bluetooth devices; or both the master and slave Bluetooth devices use the HPLC Bluetooth dual-mode solution, which increases the cost of the slave Bluetooth device, and the dual-chip module is large and not easy to promote and apply in batches. Summary of the invention

[0004] In view of the shortcomings and defects of the prior art, the present invention provides a phase identification method based on the HPLC Bluetooth communication system, which solves the problem of phase identification of Bluetooth devices in the HPLC Bluetooth communication system in the low-voltage power supply area while having cost advantages, realizes the refined management of the whole network equipment in the low-voltage power supply area, helps to improve the level of three-phase imbalance and line loss sharing management of the distribution network, is of great significance to improving power supply reliability, and can be widely used in the field of power transmission and communication.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] A phase identification method based on an HPLC Bluetooth communication system, wherein the HPLC Bluetooth communication system comprises an HPLC Bluetooth dual-mode module and a slave Bluetooth module; wherein the HPLC Bluetooth dual-mode module comprises a carrier module and a master Bluetooth module; the HPLC Bluetooth dual-mode module is installed on an electric energy meter or an intelligent circuit breaker, and the slave Bluetooth module is installed on an electric power device, such as an electric energy meter, an intelligent circuit breaker, etc. The method comprises the following steps:

[0007] S1: After the HPLC Bluetooth dual-mode module is powered on, the main Bluetooth module broadcasts and sends a clock synchronization message containing its own clock count at period T1;

[0008] S2: After receiving the clock synchronization message from the Bluetooth module, the offset is calculated based on the message transmission delay and the difference between its own clock count and the clock count of the main Bluetooth module of the HPLC Bluetooth dual-mode module;

[0009] S3: After the carrier module of the HPLC Bluetooth dual-mode module recognizes the device phase information, it simultaneously informs the main Bluetooth module of the HPLC Bluetooth dual-mode module of the information;

[0010] S4: The master Bluetooth module of the HPLC Bluetooth dual-mode module collects the current power frequency zero-crossing count C1, and broadcasts C1 and the phase information message period T2 of the phase information to the slave Bluetooth module;

[0011] S5: After receiving the phase information message from the Bluetooth module, collect the current power frequency zero-crossing count C2 and calculate the phase result from the Bluetooth module this time;

[0012] S6: Calculate the phase of the device to which the Bluetooth module belongs from the Bluetooth module statistics.

[0013] The HPLC Bluetooth dual-mode module and the slave Bluetooth module are provided with a zero-crossing acquisition circuit to complete the clock counting at the time of collecting the power frequency zero-crossing.

[0014] The clock count in step S1 is the Bluetooth chip master clock us level count.

[0015] In the step S3, the carrier module of the HPLC Bluetooth dual-mode module identifies the phase information through HPLC communication, and informs the main Bluetooth module of the HPLC Bluetooth dual-mode module through serial communication.

[0016] In the step S4, the GPIO pin interrupt of the main Bluetooth module chip of the HPLC Bluetooth dual-mode module captures the power frequency zero-crossing circuit level change and records the power frequency zero-crossing clock count C1.

[0017] In the step S5, after receiving the data packet from the Bluetooth module, the GPIO interrupt captures the current power frequency zero-crossing clock count C2;

[0018] Calculate the zero-crossing point difference between the main Bluetooth device and the Bluetooth module:

[0019] Δ t = |C2–offset–C1|% k, where k = power frequency cycle clock count;

[0020] According to the difference between the zero-crossing points of the master Bluetooth module and the slave Bluetooth module, the phase of the slave Bluetooth module is calculated as follows: tWithin the range of ±δ, the phases of the slave Bluetooth module and the HPLC Bluetooth dual-mode module are the same; if Δ t Within the range of 20 / 3ms±δ, the phase sequence difference between the slave Bluetooth module and the HPLC Bluetooth dual-mode module is 1; if Δ t Within the range of 2*20 / 3ms±δ, the phase sequence difference between the slave Bluetooth module and the HPLC Bluetooth dual-mode module is 2, where δ is the identification threshold.

[0021] In the step S6, three phase information recognition results are statistically calculated from the Bluetooth module more than 10 times, and the phase with the largest recognition result is used as the result of Bluetooth phase recognition.

[0022] The beneficial technical effects of the present invention are as follows: the problem of automatic phase recognition from Bluetooth devices in HPLC Bluetooth communication systems is solved, the requirements for in-depth application of matching substations are met, and refined management of power equipment in low-voltage substations is realized. This helps to improve the level of management of three-phase imbalance and line loss sharing in distribution networks, and is of great significance to improving power supply reliability. The combination of Bluetooth chips and industrial frequency zero-crossing circuits has a greater cost advantage and can be promoted and applied in large quantities. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The present invention is a structural schematic diagram of a HPLC-based Bluetooth communication system.

[0024] Figure 2 The present invention is a schematic diagram of the hardware structure of a HPLC-based Bluetooth dual-mode module.

[0025] Figure 3 The present invention is a schematic diagram of the hardware structure based on the Bluetooth module.

[0026] Figure 4 The present invention is an interactive flow chart of a phase identification method based on an HPLC Bluetooth communication system. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and do not limit the present invention.

[0028] A phase identification method based on an HPLC Bluetooth communication system, comprising:

[0029] like Figure 1 As shown, a HPLC-based Bluetooth communication system includes a HPLC Bluetooth dual-mode module and a slave Bluetooth module.

[0030] The HPLC Bluetooth communication system includes an HPLC Bluetooth dual-mode module and a slave Bluetooth module; wherein the HPLC Bluetooth dual-mode module includes a carrier module and a master Bluetooth module; the HPLC Bluetooth dual-mode module is installed on an electric energy meter or an intelligent circuit breaker, and the slave Bluetooth module is installed on electric power equipment, such as an electric energy meter, an intelligent circuit breaker, etc.

[0031] In this embodiment, the on-site operation and maintenance personnel configure it through the on-site mobile phone app, and the Bluetooth in the HPLC Bluetooth dual-mode module can establish a connection with all Bluetooth circuit breakers in the meter box.

[0032] like Figure 2 As shown, the HPLC Bluetooth dual-mode module has a zero-crossing acquisition circuit to complete the clock counting of the power frequency zero-crossing moment.

[0033] In this embodiment, the HPLC Bluetooth dual-mode module is installed on the circuit breaker, which meets the State Grid Corporation of China Q / GDW1344-2013 "Single-Phase Smart Energy Meter Type Specification", and the HPLC part meets the interconnection requirements.

[0034] like Figure 3 As shown, the slave Bluetooth module is provided with a zero-crossing acquisition circuit to complete the acquisition of the clock count at the moment when the power frequency crosses zero.

[0035] In this embodiment, the Bluetooth module is installed on the miniature circuit breaker and deployed as a hardware module on the hardware mainboard of the miniature circuit breaker.

[0036] like Figure 4 As shown, a phase identification method based on HPLC Bluetooth communication system comprises the following steps:

[0037] S1: After the HPLC Bluetooth dual-mode module is powered on, the main Bluetooth module broadcasts and sends a clock synchronization message containing its own clock count at period T1;

[0038] S2: After receiving the clock synchronization message from the Bluetooth module, the offset is calculated based on the message transmission delay and the difference between its own clock count and the clock count of the main Bluetooth module of the HPLC Bluetooth dual-mode module;

[0039] S3: After the carrier module of the HPLC Bluetooth dual-mode module recognizes the device phase information, it simultaneously informs the main Bluetooth module of the HPLC Bluetooth dual-mode module of the information;

[0040] S4: The master Bluetooth module of the HPLC Bluetooth dual-mode module collects the current power frequency zero-crossing count C1 and broadcasts C1 and the phase information message period T2 of the phase information to the slave Bluetooth module;

[0041] S5: After receiving the phase information message from the Bluetooth module, collect the current power frequency zero-crossing count C2 and calculate the phase result from the Bluetooth module this time;

[0042] S6: Calculate the phase of the device to which the Bluetooth module belongs from the Bluetooth module statistics.

[0043] The clock count in step S1 is the Bluetooth chip master clock us level count.

[0044] In the step S3, the carrier module of the HPLC Bluetooth dual-mode module identifies the phase information through HPLC communication, and informs the main Bluetooth module of the HPLC Bluetooth dual-mode module through serial communication.

[0045] In the step S4, the GPIO pin interrupt of the main Bluetooth module chip of the HPLC Bluetooth dual-mode module captures the power frequency zero-crossing circuit level change and records the power frequency zero-crossing clock count C1.

[0046] In the step S5, after receiving the data packet from the Bluetooth module, the GPIO interrupt captures the current power frequency zero-crossing clock count C2; the zero-crossing difference between the main Bluetooth device and the Bluetooth module is calculated as:

[0047] Δ t = |C2–offset–C1|% k, where k = power frequency cycle clock count

[0048] According to the difference between the zero-crossing points of the master Bluetooth module and the slave Bluetooth module, the phase of the slave Bluetooth module is calculated as follows: t Within the range of ±δ, the phases of the slave Bluetooth module and the HPLC Bluetooth dual-mode module are the same; if Δ t Within the range of 20 / 3ms±δ, the phase sequence difference between the slave Bluetooth module and the HPLC Bluetooth dual-mode module is 1; if Δ t Within the range of 2*20 / 3ms±δ, the phase sequence difference between the slave Bluetooth module and the HPLC Bluetooth dual-mode module is 2, where δ is the identification threshold.

[0049] In the step S6, three phase information recognition results are statistically calculated from the Bluetooth module more than 10 times, and the phase with the largest recognition result is used as the result of Bluetooth phase recognition.

[0050] In this embodiment, the master Bluetooth module and the slave Bluetooth always count in 1us, the broadcast clock counting period T1 is 1 minute, the k value is 20000us, the δ value is 0.8ms, and if the phase of the master module is phase A, if Δ t In the range of [-0.8ms, 0.8ms], the phase of the slave module device is the same as phase A. If Δ t In the range of [20 / 3-0.8ms, 20 / 3+0.8ms], the phase of the slave module is B. If Δ tIf the phase of the slave module device is in the range of [2*20 / 3-0.8ms, 2*20 / 3+0.8ms], the phase of the slave module device is C. After 10 rounds of identification, the phase identification result of the slave Bluetooth device takes the maximum value of the three-phase identification results.

[0051] The above embodiments are descriptions of specific implementation methods of the present invention rather than limitations of the present invention. Technical personnel in the relevant technical field may make various changes and modifications to obtain corresponding equivalent technical solutions without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should be included in the patent protection scope of the present invention.

Claims

1. A phase identification method based on an HPLC Bluetooth communication system, wherein the HPLC Bluetooth communication system comprises an HPLC Bluetooth dual-mode module and a slave Bluetooth module; wherein: The HPLC Bluetooth dual-mode module includes a carrier module and a master Bluetooth module; the HPLC Bluetooth dual-mode module is installed on an electric energy meter or an intelligent circuit breaker, and the slave Bluetooth module is installed on an electric power device, and the electric power device includes an electric energy meter and an intelligent circuit breaker. The method includes the following steps: S1: After the HPLC Bluetooth dual-mode module is powered on, the main Bluetooth module broadcasts and sends a clock synchronization message containing its own clock count at period T1; S2: After receiving the clock synchronization message from the Bluetooth module, the offset is calculated based on the message transmission delay and the difference between its own clock count and the clock count of the main Bluetooth module of the HPLC Bluetooth dual-mode module; S3: After the carrier module of the HPLC Bluetooth dual-mode module recognizes the device phase information, it synchronously informs the main Bluetooth module of the HPLC Bluetooth dual-mode module of the phase information; S4: The master Bluetooth module of the HPLC Bluetooth dual-mode module collects the current power frequency zero-crossing clock count C1, and broadcasts C1 and the phase information message period T2 of the phase information to the slave Bluetooth module; S5: After receiving the phase information message from the Bluetooth module, collect the current power frequency zero-crossing clock count C2, and calculate the phase result of the slave Bluetooth module based on the zero-crossing difference between the master Bluetooth module and the slave Bluetooth module: Calculate the zero-crossing point difference between the master and slave Bluetooth modules: Δ t = |C2 - offset - C1| % k, k = power frequency cycle clock count If Δ t Within the range of ±δ, the phases of the slave Bluetooth module and the HPLC Bluetooth dual-mode module are the same; if Δ t Within the range of 20 / 3ms±δ, the phase sequence difference between the slave Bluetooth module and the HPLC Bluetooth dual-mode module is 1; if Δ t In the range of 2*20 / 3ms±δ, the phase sequence difference between the slave Bluetooth module and the HPLC Bluetooth dual-mode module is 2, where δ is the identification threshold; combined with the HPLC Bluetooth dual-mode module phase, the slave Bluetooth module phase result is obtained; S6: Calculate the phase of the device to which the Bluetooth module belongs from the Bluetooth module statistics.

2. A HPLC-based Bluetooth communication system according to claim 1, characterized in that: The HPLC Bluetooth dual-mode module and the slave Bluetooth module are provided with a zero-crossing acquisition circuit to complete the clock counting at the time of collecting the power frequency zero-crossing.

3. A phase identification method based on HPLC Bluetooth communication system according to claim 1, characterized in that: The clock count in step S1 is the Bluetooth chip master clock us level count.

4. A phase identification method based on HPLC Bluetooth communication system according to claim 1, characterized in that: In step S3, the carrier module of the HPLC Bluetooth dual-mode module identifies the phase information through HPLC communication, and informs the main Bluetooth module of the HPLC Bluetooth dual-mode module through serial communication.

5. The phase identification method based on HPLC Bluetooth communication system according to claim 1, characterized in that: In the step S4, the GPIO pin interrupt of the main Bluetooth module chip of the HPLC Bluetooth dual-mode module captures the power frequency zero-crossing circuit level change and records the power frequency zero-crossing clock count C1.

6. A phase identification method based on HPLC Bluetooth communication system according to claim 1, characterized in that: In the step S6, three phase information recognition results are statistically calculated from the Bluetooth module more than 10 times, and the phase with the largest recognition result is used as the result of Bluetooth phase recognition.

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