Electric energy meter based on SOC chip integrating beidou positioning navigation and timing functions

Abstract

The application relates to an electric energy meter based on an SOC chip integrating Beidou positioning navigation and timing functions, and belongs to the electric meter measurement field.The electric energy meter comprises an XL9051 SOC chip, and an external radio frequency antenna, an HPLC circuit driving module, an Ethernet modulation and demodulation module and a signal acquisition module connected with the SOC chip.The XL9051 SOC chip integrates the Beidou positioning and timing functions, HRF, HPLC, Bluetooth, a data encryption module and an MCU into the same SOC chip.The HPLC, HRF and Bluetooth guarantee the communication capability of the electric energy meter, the data encryption module guarantees the data safety of the electric energy meter, the Beidou navigation positioning and timing functions enable the intelligent electric meter loaded with the chip to be more convenient to find in daily management and maintenance, accurate timing strengthens the cooperative work capability among the electric meters, and the electric meter is more in line with the intelligent power grid management demand.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of electric metering, and relates to an electric energy meter based on an SOC chip integrated with Beidou positioning and navigation and timing functions. BACKGROUND

[0002] With the development of smart grids, the requirements for the positioning and timing error of electric energy meters are gradually improved. At present, the electric energy meter positioning generally adopts the mode of binding the electric energy meter with the physical address of the household or uses HPLC (Broadband Power Line Communication) to collect address information, which is introduced into the concentrator for processing and then positioning. These modes have the problem of inaccurate positioning, especially in large communities and complex buildings, and the same problem also exists in the wild. This reduces the work efficiency of the operation and maintenance personnel in the process of intelligent management and daily operation of the electric meter. Therefore, the precise positioning function is imminent, which can quickly guide the operation and maintenance personnel to arrive at the scene, timely handle faults and replace equipment, and ensure the stability of power supply.

[0003] On the other hand, the modern power grid operation highly depends on accurate time synchronization. Many time-of-use pricing strategies, load monitoring and control, and key operations and meter reading information synchronization require electric energy meters and concentrators to have precise timing capabilities to ensure the timeliness and accuracy of data acquisition and operation execution. At present, some electric energy meters use high-precision clock sources to ensure clock synchronization, but the timing error of this mode will increase with time. Some electric energy meters try to introduce Beidou positioning and navigation and timing functions, but mostly use Beidou positioning modules for design. This scheme has many drawbacks: the use of Beidou positioning modules increases the PCB area of the electric energy meter, and the wiring and design are more complex, which is not conducive to miniaturization development. In addition, in the strong electromagnetic interference environment of power, it is easy to have problems such as signal transmission interruption and timing deviation. In addition, each module operates independently, making it difficult to manage power consumption, resulting in short battery life, and high cost. SUMMARY

[0004] Therefore, the purpose of the present application is to provide an electric energy meter based on an SOC chip integrated with Beidou positioning and navigation and timing functions, which integrates Beidou positioning, timing, HRF (High-speed Radio Frequency), HPLC, Bluetooth, data encryption module and MCU into the same SOC chip, to solve the deficiencies of traditional electric energy meters in power operation and maintenance management and precise time synchronization, meet the comprehensive needs of modern smart grids for electric energy meters in terms of multi-function, high reliability, miniaturization and low cost, and improve the operation efficiency and intelligent level of the power system.

[0005] To achieve the above purpose, the present application provides the following technical solutions:

[0006] An electric energy meter based on an SOC chip integrating Beidou positioning navigation and timing functions, comprising an XL9051 SOC chip, and a radio frequency antenna, an HPLC line driving module, an Ethernet modem module (ETH PHY) and a signal acquisition module externally connected therewith; the signal acquisition module comprises a coupling circuit, a voltage and current signal acquisition module and a filter (BPF);

[0007] The XL9051 SOC chip comprises an MCU, an ETH MAC, a DSP module, an encryption and decryption and chip ID storage module, a Bluetooth module, an HRF MAC&PHY, a high-speed radio frequency transceiver, an HPLC MAC, an HPLC AFE, a BDS, an SRAM, a power metering ADC module and a non-volatile flash (Nor Flash) module; the HPLC AFE comprises an ADC (analog-to-digital converter), a modem and a DAC (digital-to-analog converter); wherein the ETH MAC represents an Ethernet physical address and interface, the DSP represents a digital signal processing unit; the HRF MAC&PHY represents a high-speed wireless channel physical address and physical layer; the HPLC MAC represents a wideband power line carrier physical address, the HPLC AFE represents a wideband power line carrier analog front end; the BDS represents a Beidou navigation module; the SRAM represents a static random access memory;

[0008] The MCU communicates with the ETH MAC, the DSP, the encryption and decryption and chip ID storage module, the Bluetooth module, the HRF MAC&PHY, the high-speed radio frequency transceiver, the HPLC MAC, the HPLC AFE, the BDS, the power metering ADC module and the SRAM through an APB bus; the Ethernet modem module (ETH PHY) is connected with the ETH MAC, and is used for modulating an internal digital signal into an optical signal easy for Ethernet transmission, or demodulating an optical signal in an optical fiber into a digital signal processable by the system;

[0009] The ETH MAC is mainly used for networking; the DSP module is used for implementing various algorithms; and the MCU is responsible for controlling normal operation of the whole chip.

[0010] The configuration information and power information of the electric meter are stored in a non-volatile flash memory module, the communication signal on the power line passes through a coupling circuit, then passes through a filter (BPF) to reach the HPLC AFE, and after demodulation and ADC quantization of the modem of the HPLC AFE, reaches the MCU for processing. The voltage and current signals pass through a voltage and current signal acquisition module and are sent to a power metering ADC module, are quantized and sent to a DSP module for processing, and key information such as active power and reactive power is calculated and stored in an SRAM. The operation information and fault information of the electric meter and the power information are encrypted by an encryption and chip ID storage module, and under the control of the MCU, are sent out through a Bluetooth module, or are modulated by the HRF MAC&PHY and sent out through a high-speed radio frequency transceiver (HRF Transceiver), or are modulated by the modem of the HPLC AFE and DAC conversion, then are amplified by a driving module and coupled to the power line by a coupling circuit.

[0011] The BDS satellite information passes through a BDS dedicated antenna, then passes through a filter to reach a high-performance ADC, becomes a digital signal after the ADC, and is finally processed in a BDS core module (BDS Core) and communicated with the MCU, so that the electric meter obtains position information and time information.

[0012] Preferably, the XL9051 SOC chip further comprises a DMA, which communicates with the MCU through an APB bus; wherein the DMA represents a direct memory access module.

[0013] Preferably, the XL9051 SOC chip further comprises a UART (universal asynchronous receiver transmitter), an SPI, an I2C and a PWM modulation, which are controlled by the APB bus and communicate with external elements through a general IO port (such as GPIO MUX).

[0014] Preferably, the XL9051 SOC chip further comprises an SPC, which is controlled by the APB bus and communicates with an off-chip PSRAM through QSPI; wherein the SPC represents an interface controller; and the PSRAM represents a pseudo static random access memory.

[0015] Preferably, the XL9051 SOC chip further comprises an SFC, which is controlled by the APB bus and is used for controlling a non-volatile flash memory (Nor Flash) module; wherein the SFC represents a serial PLASH interface controller.

[0016] Preferably, the BDS shares the power management strategy with other functional modules, precisely controls the power consumption state of each functional module through intelligent low-power mode switching and cooperative working mechanism; specifically, during the period of non-positioning demand, such as when the electric energy meter is in the regular metering stage, the BDS can automatically reduce the power consumption or even make it enter the sleep state, thereby effectively reducing the energy consumption of the entire electric energy meter, prolonging the service life of the battery-powered electric energy meter, and reducing the increase in operation and maintenance costs caused by frequent battery replacement.

[0017] The electric energy meter integrates the BDS positioning and timing, HRF, HPLC, Bluetooth, data encryption module and MCU into the same SOC chip, which can improve the miniaturization and integration of the electric energy meter, optimize the power consumption, enhance the system stability, improve the anti-electromagnetic interference ability, synergistically enhance the function, and reduce the control cost.

[0018] Other advantages, objects, and features of the present application will be set forth in part in the following specification taken in conjunction with the accompanying drawings, and in part will become apparent to those skilled in the art from a consideration of the following specification and drawings. The objects and other advantages of the present application will be realized and attained by means of the instrumentalities and combinations pointed out in the following specification. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to make the purposes, technical solutions and advantages of the present application clearer, the preferred detailed description of the present application will be combined with the drawings to describe the present application, wherein:

[0020] Figure 1 XL9051 SOC chip function structure logic layout designed for the present application;

[0021] Figure 2 BDS core function schematic diagram of XL9051 SOC chip designed for the present application. DETAILED DESCRIPTION

[0022] The following describes the embodiments of the present invention by means of specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0023] Among them, the accompanying drawings are only for illustrative purposes and represent only schematic diagrams rather than actual pictures, and should not be understood as limiting the present invention. In order to better illustrate the embodiments of the present invention, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the dimensions of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the accompanying drawings.

[0024] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "back", etc. indicating directions or positional relationships, they are based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0025] See also Figures 1 and 2 The present invention provides an electric energy meter based on a system-on-chip (SOC) chip with integrated Beidou positioning, navigation, and timing functions. The meter includes the independently developed XL9051 SOC chip, an external radio frequency antenna, an HPLC line driver module, an Ethernet modem module (ETH PHY), and a signal acquisition module. The signal acquisition module includes a coupling circuit, a voltage and current signal acquisition module, and a filter (BPF).

[0026] The XL9051 SoC integrates Beidou positioning and timing, HRF (high-speed wireless communication), HPLC (high-bandwidth power line carrier communication), Bluetooth, a data encryption module, and an MCU into a single chip. HPLC, HRF, and Bluetooth ensure the meter's communication capabilities, while the data encryption module ensures meter data security. Beidou navigation and timing make smart meters equipped with this chip easier to locate during routine management and maintenance, and precise timing enhances interoperability between meters.

[0027] Figure 1 The dotted box shows the functional structure of the XL9051 SOC chip, and the peripheral components are necessary for its functions. By integrating Beidou positioning, navigation, and timing functions into the SOC chip, the XL9051 SOC chip reduces the use of external independent positioning modules and their related peripheral circuits, significantly streamlining the internal structure of the energy meter and effectively reducing the PCB size of the energy meter, making it suitable for smaller installation spaces and easier to deploy in various complex environments, thereby improving the versatility and adaptability of the energy meter. Figure 1 As shown, the XL9051 SoC includes an Ethernet interface (ETH MAC), a DSP (digital signal processing algorithm implementation module), an MCU, an encryption and decryption module and chip ID storage module, a Bluetooth module, a high-speed radio frequency (HRF) MAC and PHY module, a high-speed RF transceiver, a serial port controller (SPC), a serial PLASH interface controller (SFC), non-volatile flash memory (Nor Flash), a Broadband Data Streaming (BDS), static random access memory (SRAM), a power metering ADC module, a broadband power line carrier physical address (HPLC MAC), a broadband power line carrier analog front end (HPLC AFE), a UART (universal asynchronous receiver and transmitter), SPI, I2C communication protocols, and pulse width modulation (PWM). The MCU communicates with the ETH MAC, DSP, DMA, encryption and decryption module and chip ID storage module, Bluetooth module, HRF MAC and PHY module, high-speed RF transceiver, and BDS via the APB bus. Furthermore, the SFC, non-volatile flash memory module, SRAM, ADC, HPLC MAC, and HPLC AFE are also controlled via the APB bus. The SPC is controlled by the APB bus and communicates with the off-chip PSRAM via QSPI. The SFC is controlled by the APB bus and is used to control the non-volatile flash memory module. UART, SPI, I2C communication protocols, and PWM modulation are also controlled by the APB bus. The XL9051 uses UART, SPI, I2C, and PWM modulation to communicate with external components via general-purpose I / O ports. Meter power information and some configuration information are stored in the non-volatile flash memory.

[0028] ETH MAC is mainly used for networking, the DSP module implements various algorithms, and the MCU is responsible for controlling the normal operation of the entire chip. Under the control of the MCU, information is sent through Bluetooth or through the RF high-speed radio frequency transceiver after HRF MAC&PHY modulation. It can also be modulated by the HPLC AFE and amplified by the driver module, and finally coupled to the power line by the coupling circuit.

[0029] Figure 2 This is a schematic diagram of the solution for implementing an electric energy meter using the XL9051 SOC. Figure 2The design showcases several core functional modules, including SRAM for data storage, HPLC, HRF, and Bluetooth for communication, Nor Flash for storing meter configuration information and energy consumption, an energy metering ADC and energy metering unit (DSP) for quantizing voltage and current, encryption and decryption modules for chip ID storage, and a BeiDou module for receiving BeiDou positioning, navigation, and timing information. Communication signals on the power line pass through a coupling circuit and then a filter (BPF) to the HPLC AFE. After demodulation and ADC quantization by the HPLC AFE, the signals are processed by the MCU. Voltage and current signals are collected and then delivered to the power metering ADC module. Key information such as active and reactive power calculated by the DSP module is stored in SRAM. Meter operating and fault information, as well as energy consumption information, is encrypted by the encryption and decryption module and then transmitted to the antenna via a wireless transceiver. Alternatively, the signals are modulated by the HPLC AFE, amplified by the driver module, and coupled to the power line via a coupling circuit. Local transmission via Bluetooth is also possible. Beidou satellite information passes through a dedicated antenna for the Beidou functional module, then undergoes filtering before reaching a high-performance ADC. After passing through the ADC, it is converted into a digital signal. Finally, it is processed in the Beidou Navigation and Positioning Core Module (BDSCore) and communicates with the MCU, enabling the meter to obtain location and time information. Compared to implementing positioning and navigation functions through a combination of independent chips, the Beidou functional module integrated into the SoC chip can share power management strategies with other functional modules. Through intelligent low-power mode switching and collaborative working mechanisms, the power consumption of each functional module can be precisely controlled. During periods when positioning is not required, such as when the meter is in the regular metering phase, the Beidou module's power consumption can be automatically reduced or even put into sleep mode, effectively reducing the energy consumption of the entire meter, extending the service life of battery-powered meters, and reducing the increased operation and maintenance costs caused by frequent battery replacements.

[0030] Because it is integrated within the SoC, PCB board space and routing issues are reduced. Therefore, the integrated Beidou module significantly reduces the risk of failures caused by mechanical vibration, loose wiring, and poor contact compared to standalone module integration. The rigorous design of the SoC chip ensures the compatibility and coordinated stability of Beidou positioning and navigation functions with other core functions such as energy metering and communications. This ensures stable output of positioning and navigation information in complex and changing power operating environments, such as industrial plants with strong electromagnetic radiation areas and harsh outdoor weather conditions, providing reliable support for power operations and maintenance.

[0031] The SOC chip design fully considers the electrical compatibility between modules, uses electromagnetic shielding design, and adopts advanced packaging technology to place the Beidou positioning and navigation function under strict protection, so that it is not affected by external strong electromagnetic interference. In places such as substations and high-voltage distribution rooms where the electromagnetic environment is extremely complex, the Beidou satellite signal can still be accurately received to achieve stable positioning and accurate timing, effectively improving the working performance of the electric energy meter in a harsh electromagnetic environment and ensuring the accuracy of power data acquisition and transmission.

[0032] Under the SOC chip architecture, the Beidou positioning and navigation function can be deeply integrated and cooperatively optimized with other functions of the electric energy meter. For example, the communication mode of the electric energy meter can be intelligently adjusted according to the positioning information, and a backup communication link is preferentially enabled in remote mountainous areas or signal blocked areas. In addition, with precise timing, the metering data acquisition, storage, and reporting cycle of the electric energy meter can be synchronized to ensure accurate matching with the power grid system time, improve the accuracy of time-of-use pricing metering, improve the operating efficiency of the entire electric energy meter system, and assist in the intelligent management of the power grid.

[0033] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the present application, and all should be covered in the scope of the claims of the present application.

Claims

1. An electric energy meter based on a SOC chip integrating Beidou positioning, navigation and timing functions, characterized in that: The electric energy meter includes an XL9051 SOC chip, an external radio frequency antenna, an HPLC line driver module, an Ethernet modem module, and a signal acquisition module; the signal acquisition module includes a coupling circuit, a voltage and current signal acquisition module, and a filter; The XL9051 SOC chip includes an MCU, ETH MAC, DSP module, encryption and decryption and chip ID storage module, Bluetooth module, HRF MAC & PHY, high-speed RF transceiver, HPLC MAC, HPLC AFE, BDS, SRAM, power metering ADC module and non-volatile flash memory module; the HPLC AFE includes a modem, ADC and DAC; ETH MAC represents the Ethernet physical address and interface, DSP represents the digital signal processing unit; HRF MAC & PHY represents the high-speed wireless channel physical address and physical layer; HPLC MAC represents the broadband power line carrier physical address, HPLC AFE represents the broadband power line carrier analog front end; BDS represents the Beidou navigation module; SRAM represents static random access memory; The MCU communicates with the ETH MAC, DSP, encryption and decryption and chip ID storage module, Bluetooth module, HRF MAC & PHY, high-speed RF transceiver, HPLC MAC, HPLC AFE, BDS, power metering ADC module and SRAM via the APB bus; the Ethernet modem module is connected to the ETH MAC and is used to modulate the internal digital signal into an optical signal that is easy to transmit over Ethernet, or demodulate the optical signal in the optical fiber into a digital signal that can be processed by the system; The meter's configuration and energy information is stored in a non-volatile flash memory module. The signal on the power line passes through a coupling circuit and then a filter before reaching the HPLC AFE. After demodulation and ADC quantization by the HPLC AFE's modem, the signal reaches the MCU for processing. The voltage and current signals pass through the voltage and current signal acquisition module and reach the power metering ADC module. After quantization, they are sent to the DSP module for processing. The calculated active power and reactive power are stored in the SRAM. The meter's operating information, fault information, and energy information are encrypted by the encryption and decryption and chip ID storage modules. Under the control of the MCU, they are sent through the Bluetooth module, or modulated by the HRF MAC & PHY and then sent through a high-speed RF transceiver. Alternatively, they are modulated by the HPLC AFE's modem and converted by the DAC, amplified by the driver module, and coupled to the power line by the coupling circuit. Beidou satellite information passes through a BDS-specific antenna, then is filtered and reaches the ADC. After passing through the ADC, it is converted into a digital signal. Finally, it is processed in the Beidou navigation and positioning core module and communicates with the MCU, allowing the electricity meter to obtain location information and time information.

2. The electric energy meter based on the SOC chip integrating Beidou positioning navigation and timing functions according to claim 1 is characterized in that: The XL9051 SOC chip also includes a DMA, which communicates with the MCU via an APB bus; wherein DMA stands for direct memory access module.

3. The electric energy meter based on the SOC chip integrating Beidou positioning navigation and timing functions according to claim 1 is characterized in that: The XL9051 SOC chip also includes UART, SPI, I2C and PWM modulation, is controlled by the APB bus, and communicates with external components through the general IO port.

4. The electric energy meter based on the SOC chip integrating Beidou positioning navigation and timing functions according to claim 1 is characterized in that: The XL9051 SOC chip further includes an SPC, which is controlled by the APB bus and communicates with an off-chip PSRAM via QSPI. SPC stands for interface controller; PSRAM stands for pseudo-static random access memory.

5. The electric energy meter based on the SOC chip integrating Beidou positioning navigation and timing functions according to claim 1 is characterized in that: The XL9051 SOC chip further includes an SFC, which is controlled by the APB bus and is used to control the non-volatile flash memory module; wherein SFC represents a serial PLASH interface controller.

6. The electric energy meter based on the SOC chip integrating Beidou positioning navigation and timing functions according to claim 1 is characterized in that: The BDS shares power management strategies with other functional modules, and accurately controls the power consumption of each functional module through intelligent low-power mode switching and collaborative working mechanisms. Specifically, during periods of non-positioning requirements, the power consumption of the Beidou module is automatically reduced or even put into sleep mode.

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