PMU type feeder remote terminal

Abstract

The utility model discloses a PMU type feeder remote terminal, which belongs to the technical field of power distribution automation, and comprises an FTU module used for realizing the function of a traditional feeder remote terminal and meeting the access requirement of a power distribution automation master station; the PMU module is used for realizing high-precision sampling and high-precision synchronization functions and meeting the access requirement of a property management platform; the power supply module is used for providing a stable working power supply for the FTU module and the PMU module; the voltage transformer is used for collecting feeder line voltage; the current transformer is used for collecting feeder line current; wherein the FTU module and the PMU module are integrated in the same terminal, and no direct data interaction interface exists between the FTU module and the PMU module, so that the data security is ensured; the terminal not only meets the application requirement of a traditional feeder line remote terminal, but also meets the requirement of single-phase grounding real-time processing of an overhead line. And no data interaction interface exists between the FTU module and the PMU module, so that the data security is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to a PMU type feeder terminal, belonging to the technical field of power distribution automation. BACKGROUND

[0002] The feeder terminal unit (FTU) has remote control, remote measurement, remote signaling and fault detection functions, and communicates with the power distribution automation master station to provide power distribution system operation and various data, and executes the commands issued by the power distribution master station to control the power distribution equipment, realizes fault positioning, fault isolation and rapid recovery of power supply in non-fault area. The current feeder terminal unit (FTU) is difficult to solve the problem of accurate positioning of single-phase grounding, and the time-consuming of uploading the wave recording data is too long, which cannot upload the fault data to the master station in time and effectively. SUMMARY

[0003] The purpose of the present application is to provide a PMU type feeder terminal to solve the problems existing in the traditional feeder terminal unit (FTU).

[0004] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows: a PMU type feeder terminal, characterized in that it comprises:

[0005] The FTU module is used to realize the functions of the traditional feeder terminal unit, and meets the access requirements of the power distribution automation master station; the PMU module is used to realize high-precision sampling and high-precision synchronization functions, and meets the access requirements of the material management platform; the power module is used to provide stable working power supply for the FTU module and the PMU module; the voltage transformer is used to collect the feeder voltage; the current transformer is used to collect the feeder current; wherein the FTU module and the PMU module are integrated in the same terminal, and there is no direct data exchange interface between the FTU module and the PMU module, which ensures the data security;

[0006] The FTU module comprises: a data acquisition unit for collecting feeder state data through the voltage transformer and the current transformer; a communication unit responsible for communicating with the power distribution automation master station, uploading the feeder state data collected by the data acquisition unit to the power distribution automation master station, and receiving the control instructions of the power distribution automation master station; a control unit for remotely controlling the feeder according to the control instructions of the power distribution automation master station;

[0007] The PMU module comprises: a high-precision sampling unit which samples the feeder electrical quantity with high precision through a voltage transformer and a current transformer; a synchronization unit which adopts a high-precision clock synchronization technology and is used for ensuring time synchronization of the PMU module and the management platform, and through receiving a Beidou positioning system time reference signal, the time accuracy and consistency of the sampling data can be ensured; a communication unit which is responsible for communication with the management platform, uploads the sampled feeder electrical quantity data to the management platform, and receives control instructions or query requests of the management platform; and a control unit which is used for remotely controlling the feeder according to the control instructions of the management platform.

[0008] Further, the feeder state data comprises electrical quantity information of voltage, current and power factor.

[0009] Further, the data acquisition unit adopts a high-precision 16-bit analog-to-digital converter and samples 80 points per cycle.

[0010] Further, the high-precision sampling unit adopts a high-precision 16-bit analog-to-digital converter and samples 256 points per cycle to sample the feeder electrical quantity with high precision; the sampling frequency and resolution can be configured according to actual requirements.

[0011] Further, the control unit in the FTU module adopts a CPU of an RT1061 model.

[0012] Further, the control unit in the PMU module adopts a CPU of an STM32F407 model.

[0013] Compared with the prior art, the present application has the following technical effects:

[0014] 1. In the present application, the PMU module adopts the MQTT protocol to communicate with the management platform, and the data uploading time is greatly shortened.

[0015] 2. In the present application, the FTU module and the PMU module adopt modular design and are independently packaged in the same case or shell, and the case or shell has sufficient strength and protection level to protect the internal modules from the influence of the external environment.

[0016] 3. In the present application, the FTU module and the PMU module share the front-end voltage transformer and current transformer, effectively reducing the equipment cost.

[0017] 4. In the present application, the FTU module and the PMU module each have independent processors and memories and other resources, and can independently perform their respective functions. They have no direct data interaction interface and are only indirectly connected through power supply and shell infrastructure. This design avoids the security risks that may be caused by data interaction, and also simplifies the design and implementation of the system. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a schematic diagram of a PMU type feeder remote terminal. DETAILED DESCRIPTION

[0019] The application will be further described below in conjunction with the drawings and examples.

[0020] As Figure 1 shown, the PMU type feeder remote terminal of the embodiment includes the following:

[0021] 1. FTU module

[0022] The FTU module is mainly responsible for implementing the functions of traditional feeder remote terminals, including data acquisition, communication and control, etc. The core CPU uses RT1061.

[0023] (1) Data acquisition unit: This unit is responsible for acquiring feeder state data, including voltage, current, power factor and other electrical quantity information. The data acquisition unit uses a high-precision 16-bit analog-to-digital converter, with 80 points sampled per cycle, to ensure the accuracy and real-time performance of the acquired data.

[0024] (2) Communication unit: This unit is responsible for communicating with the distribution automation master station, uploading the acquired feeder state data to the master station, and receiving control instructions from the master station. The communication unit uses standard communication protocols and interfaces to ensure compatibility and stability with the master station.

[0025] (3) Control unit: This unit performs remote control of the feeder according to the control instructions from the master station, including switch control, protection action, etc. The control unit has the ability of fast response and reliable execution, ensuring the safety and stability of the feeder operation.

[0026] 2. PMU module

[0027] The PMU module is mainly responsible for implementing high-precision sampling and high-precision synchronization functions, meeting the real-time monitoring and synchronous analysis requirements of the feeder electrical quantity information of the management platform. The core CPU uses STM32F407. Specifically, the PMU module includes the following parts:

[0028] (1) High-precision sampling unit: This unit uses a high-precision 16-bit analog-to-digital converter to sample 256 points per cycle, and performs high-precision sampling on the feeder electrical quantity. The sampling frequency and resolution can be configured according to actual requirements, ensuring the accuracy and real-time performance of the sampled data.

[0029] (2) Synchronization unit: This unit uses high-precision clock synchronization technology to achieve time synchronization with the management platform or other PMU devices. By receiving the time reference signal of the Beidou positioning system, the synchronization unit can ensure the time accuracy and consistency of the sampled data.

[0030] (3) Communication unit: This unit is responsible for communication with the management platform, uploading the sampled feeder electrical quantity data to the management platform, and receiving control instructions or query requests from the management platform. The communication unit uses the MQTT communication protocol to ensure the real-time communication requirements between the management platform.

[0031] (4) Control unit: used for remote control of the feeder according to the control instructions of the management platform.

[0032] 3. Voltage transformer and current transformer

[0033] The voltage transformer and current transformer help the FTU module and PMU module to collect the electrical quantity information of the 10KV feeder; the FTU module and PMU module share the voltage and current transformer, effectively reducing the cost of the device.

[0034] 4. Integration of FTU module and PMU module

[0035] In the present application, the FTU module and PMU module are designed in a modular manner, each independently running without data interaction interface. This design ensures the independence and security of the two modules in terms of function, avoiding the security risks that may be caused by data interaction. At the same time, the two modules are integrated through common infrastructure such as power supply and shell, reducing the complexity and cost of the system.

[0036] Specifically, the FTU module and PMU module are physically installed in the same shell through a fixing method. The shell has sufficient strength and protection level to protect the internal modules from the external environment.

[0037] The power module provides stable power supply for the two modules to ensure their normal operation. In addition, the shell is also provided with necessary interfaces, indicator lights and other auxiliary equipment to facilitate users to connect and monitor the device.

[0038] Logically, the FTU module and PMU module each have independent processors and memories and other resources, and can independently perform their respective functions. They have no direct data interaction interface, but are indirectly connected through infrastructure such as power supply and shell. This design avoids the security risks that may be caused by data interaction, and also simplifies the design and implementation of the system.

[0039] The above only describes the preferred embodiment of the present application, and does not constitute a limitation on the protection scope of the present application. Any modification, equivalent replacement and improvement made within the spirit and principles of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A PMU-type feeder remote terminal, characterized in that, include: The FTU module is used to implement the traditional remote terminal function of the feeder, meeting the access requirements of the distribution automation master station; the PMU module is used to implement high-precision sampling and high-precision synchronization functions, meeting the access requirements of the property management platform; the power supply module is used to provide a stable operating power for the FTU module and the PMU module; the voltage transformer is used to collect the feeder voltage; the current transformer is used to collect the feeder current; the FTU module and the PMU module are integrated in the same terminal, and there is no direct data interaction interface between the FTU module and the PMU module, ensuring data security. The FTU module includes: a data acquisition unit, which acquires feeder status data through voltage transformers and current transformers; a communication unit, which is responsible for communicating with the distribution automation master station, uploading the feeder status data acquired by the data acquisition unit to the distribution automation master station, and receiving control commands from the distribution automation master station; and a control unit, which is used to remotely control the feeder according to the control commands from the distribution automation master station. The PMU module includes: a high-precision sampling unit, which performs high-precision sampling of feeder electrical quantities through voltage transformers and current transformers; a synchronization unit, which adopts high-precision clock synchronization technology to ensure that the PMU module is synchronized with the property management platform in time, and can ensure the time accuracy and consistency of the sampled data by receiving the time reference signal of the Beidou positioning system; a communication unit, which is responsible for communicating with the property management platform, uploading the sampled feeder electrical quantity data to the property management platform, and receiving control commands or query requests from the property management platform; and a control unit, which is used to remotely control the feeder according to the control commands of the property management platform.

2. The PMU-type feeder remote terminal according to claim 1, characterized in that: The feeder status data includes electrical quantity information such as voltage, current, and power factor.

3. The PMU-type feeder remote terminal according to claim 1, characterized in that: The data acquisition unit employs a high-precision 16-bit analog-to-digital converter, sampling 80 points per cycle.

4. A PMU-type feeder remote terminal according to claim 1, characterized in that: The high-precision sampling unit employs a high-precision 16-bit analog-to-digital converter, sampling 256 points per cycle to perform high-precision sampling of feeder electrical quantities.

5. A PMU-type feeder remote terminal according to claim 1, characterized in that: The control unit in the FTU module uses an RT1061 CPU.

6. A PMU-type feeder remote terminal according to claim 1, characterized in that: The control unit in the PMU module uses an STM32F407 CPU.

7. A PMU-type feeder remote terminal according to claim 1, characterized in that: The communication unit adopts the MQTT communication protocol to ensure the real-time communication requirements with the property management platform.

8. A PMU-type feeder remote terminal according to any one of claims 1-7, characterized in that: The FTU module and PMU module adopt a modular design, and each is independently packaged in the same chassis or enclosure, which can protect the internal modules from the influence of the external environment.

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