CN214622806U

CN214622806U - Centralized wired current synchronous acquisition device for grounding electrode of power transmission line

Info

Publication number: CN214622806U
Application number: CN202120393452.6U
Authority: CN
Inventors: 覃柳婷; 刘勇村; 辛灿洲
Original assignee: GUANGZHOU SCISUN TECHNOLOGY CO LTD
Current assignee: GUANGZHOU SCISUN TECHNOLOGY CO LTD
Priority date: 2021-02-22
Filing date: 2021-02-22
Publication date: 2021-11-05
Anticipated expiration: 2031-02-22

Abstract

The utility model relates to a transmission line grounding electrode centralized wired current synchronous acquisition device, which comprises a main control unit and an acquisition unit; the main control unit comprises a main control MCU and a synchronous acquisition control module which is electrically connected with the main control MCU and is used for accessing the analog signal sensor; the acquisition unit is provided with a plurality of acquisition modules, each acquisition module is independently provided with a slave MCU, an ADC module and a current sensor for acquiring grounding current of a grounding electrode feeder line, which are sequentially connected, and each acquisition module is mutually independent to acquire current and store the current in the local of the slave MCU; and the slave MCU of each acquisition module is in wired serial port communication connection with the master control MCU through the synchronous acquisition control module, and the external interrupt pins of the slave MCU of each acquisition module are respectively connected to the master control MCU. The utility model is used for the wired feed electric current of the centralized earthing pole of synchronous acquisition transmission line.

Description

Centralized wired current synchronous acquisition device for grounding electrode of power transmission line

Technical Field

The utility model belongs to the technical field of transmission line on-line monitoring and specifically relates to a centralized wired current synchronization acquisition device of transmission line earthing pole.

Background

With the rapid development of national economy, the power requirements of various regions are continuously increased, the power grid construction in China is unprecedented, and the high-voltage direct-current transmission project is developed very rapidly. The grounding electrode of the high-voltage direct-current transmission line plays an extremely important role in the operation of a direct-current transmission system: one is to clamp the neutral point and provide a dc current path. For example, a monopole earth return circuit and a double-pole two-end grounding directly transmit electric power for the system for a long time, so that the running reliability of the system is improved; and the neutral point potential is clamped, so that the damage to equipment caused by unbalance of the voltages of the two poles to the ground, such as a unipolar metal loop, ungrounded two ends of a bipolar, and the like, is avoided. Because powerful direct current is injected into the ground through the grounding electrode, the ground potential is greatly increased, new problems of step voltage, soil heating, electrode electric corrosion and the like occur, and the normal operation of a direct current system is damaged, so that the monitoring of the grounding electrode system is very important, and an important basis is provided for the operation, maintenance, detection and management of the grounding electrode.

At present, the operation parameter acquisition and the like of the direct current grounding electrode are basically completed by manual measurement, the automation degree is very low, the synchronism of the feed current acquisition is extremely poor, and the total current of the grounding electrode is not always kept unchanged, so that errors exist in the feed shunt coefficient calculation, and the operation condition of the whole grounding electrode system cannot be well fed back. However, the direct current converter station is used as a key device in the direct current transmission system, and the operation of the device is directly related to the stability of the whole high-voltage direct current transmission system, so that the monitoring of the operation condition of the earth electrode can be well completed by collecting the earth electrode feed earth current and the step voltage data, collecting the water level and temperature of the detection well, the device temperature of the central area, the soil temperature and humidity, the video and the like, and carrying out real-time online monitoring. And the operation condition of the whole grounding electrode system can be quickly fed back by the feed current and the shunt coefficient of the feed cable, so that the key point is to ensure the synchronism of the feed current measurement.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at gathers the wired feed current of the centralized earthing pole of transmission line in step.

In order to achieve the object, according to an aspect of the present invention, there is provided a centralized wired current synchronous collecting device for a power transmission line grounding electrode, comprising a main control unit and a collecting unit; the main control unit comprises a main control MCU and a synchronous acquisition control module which is electrically connected with the main control MCU and is used for accessing the analog signal sensor; the acquisition unit is provided with a plurality of acquisition modules, each acquisition module is independently provided with a slave MCU, an ADC module and a current sensor for acquiring grounding current of a grounding electrode feeder line, which are sequentially connected, and each acquisition module is mutually independent to acquire current and store the current in the local of the slave MCU; and the slave MCU of each acquisition module is in wired serial port communication connection with the master control MCU through the synchronous acquisition control module, and the external interrupt pins of the slave MCU of each acquisition module are respectively connected to the master control MCU.

Furthermore, the main control unit comprises a wireless synchronous communication module electrically connected with the main control MCU, the acquisition unit is provided with a plurality of current acquisition modules capable of realizing wireless communication and distributed in position, and each current acquisition module is respectively communicated with the wireless synchronous communication module.

Further, the main control unit comprises an RS485 data interface module, a switching value acquisition module and an Ethernet module which are respectively and electrically connected with the main control MCU, the acquisition unit is provided with an ultrasonic meteorological sensor to be connected with the RS485 data interface module, a tipping bucket type rainfall sensor to be connected with the switching value acquisition module, and a digital camera to be connected with the access Ethernet module.

Furthermore, the main control unit comprises a full-standard network wireless communication module for remote communication with the system background through a mobile network.

Further, the full-standard network wireless communication module is a full-network 4G wireless communication module.

Furthermore, the main control unit comprises a data storage module electrically connected with the main control MCU.

The power supply device further comprises a power supply unit which is provided with a battery charging and discharging control module, a power taking module and an energy storage module which are respectively and electrically connected with the battery charging and discharging control module, and the main control unit is provided with a power supply management module which is used for being controlled by the distribution and supply of a power supply in the main control MCU management device and is electrically connected with the battery charging and discharging management module.

Furthermore, the main control unit comprises a power-off protection clock module for providing a clock for the system, and the power-off protection clock module is electrically connected with the main control MCU.

The technology of the utility model has the following characteristics:

the feeder current centralized synchronous acquisition method is provided, synchronous acquisition of all the feeder currents is realized in a wired connection mode, the accuracy of the shunt coefficient of the feeder currents is improved, the operation condition of the whole direct current grounding electrode system is monitored more accurately, an important basis is provided for operation, maintenance, detection and management of the grounding electrode, and the operation reliability of the line is effectively improved.

The above description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention can be implemented according to the content of the description, and in order to make the said and other objects, features and advantages of the present invention more obvious and understandable, the following detailed description of the present invention is given.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like elements throughout the drawings.

In the drawings:

fig. 1 shows a system block diagram of the grounding electrode integrated online monitoring system of the present invention;

fig. 2 shows a communication schematic diagram of centralized wired synchronous acquisition of the present invention;

fig. 3 shows a flow chart of centralized wired synchronous acquisition of the present invention;

fig. 4 shows a schematic structural diagram of the electronic device of the present invention;

fig. 5 shows a schematic structural diagram of the computer-readable storage medium of the present invention.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

As shown in FIG. 1, the utility model discloses a whole earth electrode comprehensive on-line monitoring system divides into main control unit 1, power supply unit 2, acquisition unit 3 altogether.

The main control unit 1 is electrically connected with the power supply unit 2, and the acquisition unit 3 is electrically connected with the main control unit 1. The power supply unit 2 provides a power supply for the operation of the whole system, and the main control unit 1 controls the functions of the whole system, manages the power supply of the acquisition unit 3 and realizes the external sensor and image video acquisition of data acquisition.

The main control unit 1 comprises a central processing module 11, a power-off protection clock module 15, a data storage module 16, a debugging module 17, a power management module 12, an upper computer full-network-wide 4G wireless communication module 13, a lower computer communication module 14 and the like. The power-off protection clock module 15, the data storage module 16, the debugging module 17, the power management module 12, the upper computer full-network-communication 4G wireless communication module 13 (i.e., a full-standard network wireless communication module), and the lower computer communication module 14 are respectively connected with the central processing module 11 in an embedded manner.

The central processing module 11 includes a master MCU111 and a hardware watchdog circuit 112. The main control MCU111 is used for realizing the functions of the whole device, including data acquisition, processing, uploading to a background, power control of each sensor and the image video module, and the like. The hardware watchdog circuit 112 is not controlled by the main control MCU111 when operating, and when the program of the main control MCU111 is abnormal, the hardware watchdog circuit 112 outputs a reset level to the reset pin of the main control MCU111 for resetting.

The power-off protection clock module 15 is electrically connected with the main control MCU111, provides a clock for the system, can protect the clock to continue to run when the equipment is powered off or restarted, and ensures the accuracy of the system clock when the equipment resumes running.

The data storage module 16 is electrically connected to the main control MCU111, and is mainly used for storing data processed by the main control MCU111 and ensuring data integrity. When the wireless network communication is disconnected with the background server, the data to be uploaded can be stored, and the data can be continuously uploaded after the tape network is recovered, so that the integrity of the data is ensured.

The function of the debugging module 17 includes debugging the device, configuring parameters, downloading programs, and the like.

The power management module 12 of the main control unit 1 is electrically connected with the battery charging and discharging management module of the power supply unit 2. The power management module 12 is used for managing the distribution and supply of power inside the device, and is controlled by the main control MCU 111.

The upper computer whole network communication 4G wireless communication module 13 supports a mobile, Unicom and telecom operator 4G/3G/2G whole system network. The wireless remote monitoring system has the function that the sensor data, the image video data and the like which are acquired, analyzed and processed can be transmitted to a system background in a wireless mode, so that wireless remote monitoring is realized.

The lower computer module 14 comprises a synchronous acquisition control module 141, an RS485 data interface module 142, a wireless synchronous communication module 143, a switching value acquisition module 144, and an ethernet module 145. The module 14 is used for connecting an external data sensor, wherein the synchronous acquisition control module 141 can be used for connecting an analog signal sensor; the RS485 data interface module 142 is used for accessing an RS485 digital sensor, such as an ultrasonic meteorological sensor; the switching value acquisition module 144 is used to access a switching value type sensor, such as a dump bucket rainfall sensor; the wireless synchronous communication module 143 is used for accessing sensors which are far away and are not suitable for accessing in a wired manner, such as distributed grounding electrode grounding cable current acquisition sensors with scattered sensor installation positions, stepping voltage acquisition sensors, and the like; the ethernet communication module 145 is used for access of a digital camera, etc.

The power supply unit 2 is a power supply unit of the whole device and is composed of a battery charging and discharging control module 21, a power taking module 22 and an energy storage module 23. The battery charging and discharging control module 21 is electrically connected with the power taking module 22 and the energy storage module 23 respectively. The electricity taking module 22 can select a solar battery assembly or wind energy, ground wire induction energy taking and the like according to the field environment, and the energy storage module 23 can select a lead-acid storage battery, a lithium battery and the like. The battery charge-discharge controller module 21 has functions of automatic float charge energy, overvoltage protection, undervoltage protection, overcurrent protection, temperature compensation and the like.

The acquisition unit 3 can be accessed with different types of sensors according to the actual monitoring needs. When the grounding current of the centralized feed cable needs to be measured, the synchronous acquisition of the grounding current of the feed line can be realized by accessing the wired current sensor to the synchronous acquisition control module; when the current of the distributed feeder cable needs to be measured, a distributed wireless synchronous measurement current sensor can be selected, the synchronous acquisition of the ground current of the feeder line is realized, and data is uploaded to a host through a short-distance wireless communication module; the RS485 data interface module can be connected with an RS485 ultrasonic meteorological digital sensor; the switching value acquisition module is connected to the tipping bucket type rainfall sensor; an ethernet module or the like is connected to a digital camera or the like.

The utility model provides a centralized wired current synchronous acquisition method for it is concentrated to solve the earth electrode and go into ground cable distribution, realizes the problem of synchronous acquisition feed current.

Generally speaking, when using wired mode test earthing pole feeder to go into ground current, often be at the relatively concentrated earthing pole of feeder income ground cable distribution, when carrying out wired line collection, in the past, send the mode of gathering the instruction to the serial ports of collection module through master control MCU and gather in proper order, this kind of method is a rough synchronous mode only, has the degree of accuracy of calculating when having certain and has the error, for this reason, as shown in fig. 2-3, the utility model provides a solution as follows:

(1) the system is characterized in that multiple paths of acquisition modules are arranged, each path of acquisition module is independently provided with a slave MCU, an ADC module and a current sensor, the slave MCU, the ADC module and the current sensor are sequentially connected and are used for acquiring the grounding current of a grounding electrode feeder line, the acquisition modules are mutually and independently used for acquiring the current and storing the current data locally in the slave MCU, the slave MCU of each path of acquisition module is in wired serial port communication connection with the master MCU through a synchronous acquisition control module, and external interrupt pins of the slave MCU of each path of acquisition module are respectively connected to the master MCU.

(2) The master control MCU controls the power switch and the acquisition process of each path of acquisition module at the same time, and controls each path of slave MCU to turn off the power supply to enter a power saving mode when acquisition is not needed.

(3) When the timing sampling time point arrives or the feeding current data is requested to be acquired, the master control MCM opens the power supply of each acquisition module, and broadcasts and sends an acquisition instruction to each acquisition module through the serial port bus.

(4) And each path of acquisition module starts to carry out high-speed AD acquisition and circularly stores data locally in the slave MCU for backtracking.

(5) When the master control MCU synchronously sends level interrupt signals to the external interrupt pins of each slave MCU through the IO pin in an interrupt triggering mode, each path of acquisition module is triggered by interrupt to stop acquiring and storing the current acquired data locally in the slave MCU. Compared with the mode of stopping serial port broadcasting, the mode of interruption has the advantages that the response is faster, the synchronism is higher, the receiving and analyzing, the process switching and the like of each slave MCU are required, uncertain time delay can be caused, the synchronism is influenced, and errors are caused.

(6) And the main control MCU acquires the feeder current data of each acquisition module, performs analysis processing calculation and uploads the data to the background, and then closes the power supply of each acquisition module.

The utility model discloses a direct current earthing pole synthesizes on-line monitoring device can gather the data of various differences simultaneously (including wireless, wired sensor data etc.), the collection of video, image, can synthesize unified processing to all collection volumes, and data application wired mode such as short distance sensor is connected, and the monitoring volume of sensor data collection wireless mode far away to different mounting points monitors.

The device communication module is configured with a 4G full-network communication module. The device can upload the processed data to the server background through the mobile network.

Furthermore, the utility model discloses a centralized synchronous acquisition device can realize distributing characteristics to different earth electrode feeder cables, carries out the calculation of feed current synchronous acquisition and feeder cable reposition of redundant personnel coefficient, improves data measurement precision and earth electrode measurement work efficiency, is that a commonality is strong, simple to operate, method are simple and easy, measure accurate, stable performance, can eliminate earth electrode feeder cable reposition of redundant personnel coefficient's test error, have safety, simple and convenient, efficient characteristics.

The utility model discloses a centralized synchronous collection system, the centralized synchronous collection of compatible feeder current and the synchronous collection scheme of feeder current distributing type simultaneously, application scope is wide, and the commonality is strong, and convenience of customers carries out extensive deployment in the comprehensive monitoring demand of different earthing poles, has safety, simple and convenient, efficient characteristics, indirectly improves transmission line's operational reliability.

The centralized synchronous acquisition aims at the characteristics that the distribution of the grounding electrode grounding feed cables is centralized and the distance of each feed cable is short, the current sensors are connected into the cables in a wired connection mode, the synchronous acquisition of feed current data is realized by a wired synchronous measurement method, and the maximum 128 paths of the feed current sensors can be flexibly configured in the whole device.

The main control MCU analyzes, processes and calculates the measurement of different sensors and the acquired data of image video data, and transmits the data to the background server in a wireless communication mode to realize the remote monitoring of the direct grounding electrode system.

By adopting the power supply load graded management method, the power supply can be switched on and off according to the task condition, thereby achieving the energy-saving effect

It should be noted that:

the method used in this embodiment can be converted into program steps and apparatuses that can be stored in a computer storage medium, and the program steps and apparatuses are implemented by means of calling and executing by a controller, wherein the apparatuses should be understood as functional modules implemented by a computer program.

The algorithms and displays presented herein are not inherently related to any particular computer, virtual machine, or other apparatus. Various general purpose devices may be used with the teachings herein. The required structure for constructing such a device will be apparent from the description above. Furthermore, the present invention is not directed to any particular programming language. It is appreciated that a variety of programming languages may be used to implement the teachings of the present invention as described herein, and any descriptions of specific languages are provided above to disclose the best modes of the invention.

In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: rather, the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.

Those skilled in the art will appreciate that the modules in the device in an embodiment may be adaptively changed and disposed in one or more devices different from the embodiment. The modules or units or components of the embodiments may be combined into one module or unit or component, and furthermore they may be divided into a plurality of sub-modules or sub-units or sub-components. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features and/or processes or elements are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.

Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments may be used in any combination.

Various component embodiments of the invention may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. The present invention may also be embodied as apparatus or device programs (e.g., computer programs and computer program products) for performing a portion or all of the methods described herein. Such a program implementing the invention may be stored on a computer readable medium or may be in the form of one or more signals. Such a signal may be downloaded from an internet website or provided on a carrier signal or in any other form.

For example, fig. 4 shows a schematic structural diagram of an electronic device according to an embodiment of the present invention. The electronic device conventionally comprises a processor 31 and a memory 32 arranged to store computer-executable instructions (program code). The memory 32 may be an electronic memory such as a flash memory, an EEPROM (electrically erasable programmable read only memory), an EPROM, a hard disk, or a ROM. The memory 32 has a storage space 33 storing program code 34 for performing any of the method steps in the embodiments. For example, the storage space 33 for the program code may comprise respective program codes 34 for implementing respective steps in the above method. The program code can be read from or written to one or more computer program products. These computer program products comprise a program code carrier such as a hard disk, a Compact Disc (CD), a memory card or a floppy disk. Such a computer program product is typically a computer readable storage medium such as described in fig. 5. The computer readable storage medium may have memory segments, memory spaces, etc. arranged similarly to the memory 32 in the electronic device of fig. 4. The program code may be compressed, for example, in a suitable form. In general, the memory unit stores program code 41 for performing the steps of the method according to the invention, i.e. program code readable by a processor such as 31, which when run by an electronic device causes the electronic device to perform the individual steps of the method described above.

It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention can be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.

Claims

1. Centralized wired electric current synchronous acquisition device of transmission line earthing pole, its characterized in that:

comprises a main control unit and an acquisition unit;

the main control unit comprises a main control MCU and a synchronous acquisition control module which is electrically connected with the main control MCU and is used for accessing the analog signal sensor;

the acquisition unit is provided with a plurality of acquisition modules, each acquisition module is independently provided with a slave MCU, an ADC module and a current sensor for acquiring grounding current of a grounding electrode feeder line, which are sequentially connected, and each acquisition module is mutually independent to acquire current and store the current in the local of the slave MCU;

and the slave MCU of each acquisition module is in wired serial port communication connection with the master control MCU through the synchronous acquisition control module, and the external interrupt pins of the slave MCU of each acquisition module are respectively connected to the master control MCU.

2. The apparatus of claim 1, wherein: the master control unit comprises a wireless synchronous communication module electrically connected with the master control MCU, the acquisition unit is provided with a plurality of current acquisition modules capable of realizing wireless communication and distributed in position, and each current acquisition module is respectively communicated with the wireless synchronous communication module.

3. The apparatus of claim 2, wherein: the main control unit comprises an RS485 data interface module, a switching value acquisition module and an Ethernet module which are respectively and electrically connected with the main control MCU, the acquisition unit is provided with an ultrasonic meteorological sensor to be connected with the RS485 data interface module, a tipping bucket type rainfall sensor to be connected with the switching value acquisition module, and a digital camera to access the Ethernet module.

4. The apparatus of claim 1, wherein: the main control unit comprises a full-standard network wireless communication module for remote communication with the system background through a mobile network.

5. The apparatus of claim 4, wherein: the full-standard network wireless communication module is a full-network 4G wireless communication module.

6. The apparatus of claim 4, wherein: the main control unit comprises a data storage module electrically connected with the main control MCU.

7. The apparatus of claim 1, wherein: the power supply device is characterized by further comprising a power supply unit, wherein the power supply unit is provided with a battery charging and discharging control module, a power taking module and an energy storage module which are respectively electrically connected with the battery charging and discharging control module, and the main control unit is provided with a power supply management module which is used for being controlled by the main control MCU management device to distribute and supply power so as to be electrically connected with the battery charging and discharging management module.

8. The apparatus of claim 1, wherein: the master control unit comprises a power-off protection clock module for providing a clock for the system and is electrically connected with the master control MCU.