A reverse power prevention and control intelligent cloud system

Abstract

The application provides a reverse power supply prevention and control intelligent cloud system, and belongs to the technical field of reverse power supply risk cloud management. The reverse power supply prevention and control intelligent cloud system comprises an MIS system user file information management terminal, the MIS system is mounted with a reverse power supply potential user list, the MIS system realizes data interaction between the communication module and the handheld terminal, and the reverse power supply potential user list comprises a user number, a reverse power supply type, user transformer area and distribution network line division, a user end actual address and a user contact method. On the basis of intelligent control of reverse power supply users, a cloud collaborative management module is established, a multi-end collaborative information sharing concept is adopted, and the reverse power supply risk of multi-power supply users to the power grid side is reduced.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of anti-feed electricity risk cloud management, and particularly relates to an anti-feed electricity prevention and control intelligent cloud system. BACKGROUND

[0002] Clean energy such as photovoltaic and wind power develops rapidly due to its low-carbon environmental protection advantages, and the development momentum is becoming more and more fierce. With more and more distributed power sources connected to each voltage level distribution network, the traditional distribution network becomes a multi-terminal active network. New energy users also become the source of hidden troubles of anti-feed electricity to the distribution network. In order to improve the reliability of power supply, power users use dual power supply or dual loop power supply, and single power supply users set up self-provided emergency power supply at the user side, which makes the source and safety risk problem of anti-feed electricity more and more complex, endangering the safety of distribution network operating personnel and equipment. Therefore, it is imperative to study the safety risk management and control based on anti-feed electricity.

[0003] In order to improve the reliability of power supply, power users use dual power supply or dual loop power supply, or set up self-provided emergency power supply at the user side, which makes the source and safety risk problem of anti-feed electricity more and more complex, endangering the safety of distribution network operating personnel and equipment.

[0004] Patent document CN110165786A discloses an intelligent low-voltage photovoltaic anti-feed electricity monitoring and control system. The control unit collects switch action signals and transmits them to the communication module, and the communication module sends switch state information to the operation and maintenance personnel in real time. The technical solution is suitable for emergency circuit breaking after anti-feed electricity occurs, and cannot realize anti-feed electricity risk prevention. SUMMARY

[0005] The technical problem to be solved by the present application is to provide an anti-feed electricity prevention and control intelligent cloud system for intelligent and cloud collaborative management of anti-feed electricity behavior in view of the deficiencies of the prior art.

[0006] To solve the above technical problems, the technical scheme adopted by the present application is:

[0007] An anti-feed electricity prevention and control intelligent cloud system, comprising a MIS system user file information management terminal, the MIS system is mounted with an anti-feed electricity potential user list, the MIS system realizes data interaction between the communication module and the handheld terminal,

[0008] The anti-feed electricity potential user list includes user number, anti-feed electricity power supply type, user substation and distribution network line division, user end actual address, and user contact method,

[0009] The handheld terminal can download the anti-feed electricity potential user list from the MIS system,

[0010] The handheld terminal can field test electricity and upload the user end live user number to the MIS system.

[0011] The handheld terminal can store PMS line, transformer area, user power distribution room, etc. The handheld terminal is connected with the electric energy collection system. The electric energy collection system is arranged on the user end to send the voltage and power flow direction information monitored by the user end to the handheld terminal. The handheld terminal is mounted with a wireless communication chip. The electric energy collection system includes a smart meter or a current detector.

[0012] The communication module is a signal base station connected with the wireless communication chip. An open data transmission protocol interface is arranged on the signal base station.

[0013] The MIS system sends a reverse power supply danger warning to the corresponding user according to the user live number uploaded by the handheld terminal, and issues a user verification task to the handheld terminal. The task requires the user to verify the user power supply type and to publicize the hazards and safety knowledge of reverse power supply of self-provided power supply to the user. The verified user power supply type is uploaded through the handheld terminal. The MIS system uploads the user power supply type and the user live number uploaded by the handheld terminal to the reverse power supply potential user list after searching and copying.

[0014] The reverse power supply type includes dual power supply users, energy storage users, distributed photovoltaic users and self-provided power supply users.

[0015] Further, household self-generation and self-provided power, as a new concept emerging recently, has a rapid development from zero in recent years. Early household self-provided power usually needs to be connected by manual connection of workers during use, and the safety procedures of disconnecting power supply in advance are often marked in the instruction manual. Therefore, in the early stage, the self-provided power supply with small amount has little impact on the safety of power grid.

[0016] Further, dual power supply, self-provided power supply users and more and more new energy users send power back to the distribution network through the grid connection point, which seriously endangers the safety of field workers and power grid equipment. By analyzing the shortcomings of existing reverse power supply prevention and control technology, it is proposed to use MIS system to establish a reverse power supply risk management and control mechanism for distribution network with reverse power supply users as a tag, to ensure the safety of field workers and provide practical basis for the safety management of distribution network.

[0017] Further, the early anti-feed prevention device tends to be more electrical and mechanical structure, adopts point-to-point monitoring mode, realizes the protection of power grid and the management of anti-feed, and has certain feasibility under the premise that the self-provided power user scale is small and the record management is timely, but the device is not suitable for large-scale management of urban clusters. At the same time, it deviates from the development trend of intelligent and automatic power grid.

[0018] Further, the existing low-voltage distributed photovoltaic intelligent anti-feed prevention system includes four units: voltage monitoring unit, operation unit, automatic control unit and communication unit.

[0019] Further, the application of intelligent fusion terminal can improve the efficiency of accurate prevention and control. The MIS system is increased with user tags such as "anti-feed user" tag, and the anti-feed user system account is established. Through the fusion of handheld terminal by field operation personnel, the anti-feed user account information, user electrical drawings and distribution network line drawings can be retrieved by one key, and the current direction information of the user collected by the electric energy collection system can be used to automatically judge whether the anti-feed is connected and start the intelligent reminder and electricity verification, so as to greatly improve the retrieval efficiency and the accuracy and efficiency of prevention and control.

[0020] Further, based on the rapid progress of UPS (uninterruptible power supply) technology, the current market has various types of power supply which basically have the technical feature of being directly connected with the user end power supply line. This technical feature can meet the advantage of automatically switching power supply for users when the power grid is powered off. It ensures the uninterrupted operation of user end electrical equipment. However, due to various reasons, there is no clear requirement for the automatic cut-off device of the power supply line of the self-provided power supply, which also causes a part of the self-provided power supply to form a safety hazard of reverse power supply when the power grid is powered off.

[0021] Further, based on the development trend of power grid automation and intelligentization, a multi-element collaborative anti-feed inspection and management platform is established to build an anti-feed data management platform for the overall structural optimization of power grid.

[0022] Further, based on the MIS system, the list of potential anti-feed users is set to realize the rapid investigation and management of anti-feed users.

[0023] Further, reference is made to the following documents to improve the application of related technologies.

[0024] [1] Wang Longyu, Liu Can, Wang Bingdong, Cai Lei. Transmission network risk assessment method considering the influence of micro-grid charging station [J]. Power system protection and control, 2018, 46(05):114-121.

[0025] [2] Ma Jie, Zhao Dongsen. Discussion on the influence of small power anti-feed by substation outage accident [J]. Journal of State Grid Technical College, 2018, 21(01):9-12.

[0026] [3] Li Jie, Yin Duo, Chen Zengsheng, Liu Xiaoqin. 0.4 / 0.22kV low voltage distribution network construction anti-reverse power device development and application [J]. Communication power technology, 2020, 37(06): 277-278.

[0027] [4] Meng Kai. Low voltage distribution cabinet and anti-reverse power device function characteristics summary [J]. Mechanical management and development, 2019, 34(12): 267-269.

[0028] [5] Chen Da. The role of loss of voltage trip in preventing reverse power [J]. Popular power, 2017, 32(08): 28-29.

[0029] [6] Chen Xing, Huang Yunlong, Xu Kang. Research and application of low-voltage photovoltaic intelligent anti-reverse power system [J]. Electrical technology, 2019(08): 122-123+126.

[0030] Further, for the user with potential reverse power hidden trouble, a perfect reverse power potential user account information is established, grid service is carried out, low voltage is taken as a unit, medium voltage is taken as a unit, reverse power user system account is established, one key search is carried out, account information is sent by field operation or marketing personnel handheld terminal APP, terminal can also on-site electric test, store or receive PMS line, substation, user power distribution room and other drawing information, receive electric energy collection system user power information, judge whether it is reverse power according to power direction and intelligently remind, which can greatly improve the search efficiency and the accuracy and efficiency of prevention and control, and also facilitate the marketing department to efficiently carry out the normal anti-reverse power inspection work.

[0031] Compared with the prior art, the beneficial effects of the present application are as follows:

[0032] Further, the multi-to-multi data interaction transmission mode between the MIS system as the storage terminal and the handheld terminal is adopted, the open data transmission protocol interface is adopted, the compatibility of the number of users and ports is improved. Data management cooperation between other data platforms can be realized.

[0033] Further, the reverse power potential user list includes user number, reverse power supply type, user substation and distribution network line division, user end actual address, user contact information, meets the search mode of fast finding target user, line positioning and grid screening, reduces the troubleshooting time and improves the operation speed. The record of the type of reverse power supply is realized, which is convenient for management and further improves the search of the type of power supply. The user substation and distribution network line division are stored, which is convenient for searching the power supply in the line coverage range when the line is repaired. Prevent live working.

[0034] Furthermore, the handheld terminal can realize the retrieval of the list of potential users of reverse power transmission and the upload of the user's power number and related information.

[0035] Furthermore, an electric energy collection system is set up to achieve rapid early warning of reverse power transmission phenomena.

[0036] Furthermore, a review process is added to meet the data collection process for reporting, filing, publicizing safety regulations, and information filing of relevant numbers of self-provided power users.

[0037] Furthermore, digital information technology is being adopted to achieve precise prevention and control of reverse power transmission. A list of potential reverse power users is added to the existing MIS system, enabling one-click retrieval. This list is then sent to handheld terminals of distribution network operators and marketing personnel to achieve precise prevention and control of reverse power transmission. This includes targeted power outages for these potential users, regular power usage inspections, and pre-operation notifications to customers to ensure they cooperate with measures. With an open data interface, the handheld terminal can also perform on-site power testing and add a terminal to send information from the power collection system to determine in real time whether reverse power transmission exists. This provides data information services for on-site operators and marketing service personnel, enabling efficient work and precise prevention and control of reverse power transmission.

[0038] Furthermore, the communication of the intelligent cloud system for the prevention and control of reverse power transmission adopts wireless network, and a system ledger list of reverse power transmission users is established in the MIS system. Through the intelligent fusion handheld terminal of on-site workers, the reverse power transmission user ledger information, user electrical drawings and distribution network line drawings can be retrieved with one click (realizing intelligent reminders for the identification of reverse power transmission risk sources and reminders for safety measures one by one), and the user voltage and current direction collected by the power collection system can be used to automatically determine whether reverse power transmission occurs, and intelligent reverse power transmission reminders and safety measures can be taken on site, so as to greatly improve the retrieval efficiency and the accuracy and efficiency of prevention and control. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The present invention will be described in further detail below with reference to the accompanying drawings.

[0040] Figure 1 : Schematic diagram of system distribution of the present invention;

[0041] Figure 2 : Schematic diagram of the existing low-voltage distributed photovoltaic intelligent anti-reverse power transmission system. DETAILED DESCRIPTION

[0042] In order to better understand the present invention, the content of the present invention is further clearly described below in conjunction with the examples and drawings, but the protection content of the present invention is not limited to the following examples. In the following description, a large number of specific details are given in order to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without one or more of these details.

[0043] Embodiment 1

[0044] As Figure 1-2 shown, the embodiment provides a reverse power supply prevention and control intelligent cloud system, including a MIS system user profile information management terminal, the MIS system mounts a reverse power supply potential user list, the MIS system realizes data interaction between the communication module and the handheld terminal,

[0045] The reverse power supply potential user list includes user number, reverse power supply type, user substation and distribution network line division, user end actual address, user contact information,

[0046] The handheld terminal can download the reverse power supply potential user list from the MIS system,

[0047] The handheld terminal can field test electricity and upload the user end live user number to the MIS system.

[0048] The handheld terminal can store PMS line, substation, user power distribution room and other information, the handheld terminal is connected with the electric energy collection system, the electric energy collection system is arranged on the user end, the voltage and power flow direction information monitored by the user end are sent to the handheld terminal, the handheld terminal is mounted with a wireless communication chip, and the electric energy collection system includes a smart meter or a current detector.

[0049] The communication module is a signal base station connected with the wireless communication chip, and an open data transmission protocol interface is arranged on the signal base station.

[0050] The MIS system sends a reverse power supply danger warning to the corresponding user according to the user live number uploaded by the handheld terminal, and sends a user verification task to the handheld terminal, which requires the user to verify the user power supply type and publicize the hazards and safety knowledge of reverse power supply of self-provided power supply to the user, uploads the verified user power supply type through the handheld terminal, and the MIS system uploads the user power supply type and user live number uploaded by the handheld terminal after searching and copying to the reverse power supply potential user list.

[0051] The reverse power supply type includes dual power supply user, energy storage user, distributed photovoltaic user and self-provided power supply user.

[0052] In the MIS system, all possible reverse power supply users such as dual power supply users and self-provided emergency power supply users are added with a reverse power supply risk user label, and the intelligent handheld terminal can search the reverse power supply risk user list through the MIS system

[0053] At the same time, the cloud system can determine the user who has ever and real-time reverse power supply according to the history and real-time monitoring of voltage and current direction, and list the user in the reverse power supply risk user list

[0054] The MIS system is connected with a network cloud platform, and the network cloud platform automatically backs up the reverse power supply potential user list.

[0055] When the MIS system is offline, the handheld terminal automatically connects to the network cloud platform every 1 hour, and if the connection fails for 3 times, the handheld terminal automatically switches to the connection mode with the network cloud platform.

[0056] When the MIS system is reconnected, the MIS system sends a data review instruction to the network cloud platform at the offline time node, and the network cloud platform forwards the data received from the time node to the MIS system, realizing the offline backup of the MIS system.

[0057] The MIS system retrieves the user number, user substation and distribution line division, user actual address, and user contact information associated with the user power type and user power-on number uploaded by the handheld terminal in the MIS system, and copies and stores them together with the user power type in the reverse power supply potential user list.

[0058] The user power-on number includes the user number and the reverse power supply live identification code.

[0059] The user verification work includes the verification code associated with the user power-on number, the user number, the user substation and the distribution line division, the user actual address, and the user contact information.

[0060] The handheld terminal accesses the GIS system, retrieves and downloads all low-voltage users connected to the public substation drawing in the GIS system, and displays the connection position and connection mode of 400 / 220-volt users.

[0061] The GIS system and the electric energy collection system communicate information through a wireless private network.

[0062] Before the construction work, the handheld terminal accessing the MIS system and the electric energy collection system can one-key query all the reverse power supply risk user list, distribution line drawing, user electrical drawing, and substation drawing, and send the future power-off plan and the information of the safety technical measures required for user cooperation to these reverse power supply risk users, while the work personnel can also easily identify the reverse power supply risk source and safety technical measures plan in advance, fill out the work ticket, draw the reverse power supply risk point, and list the specific anti-reverse power supply safety measures. Not only can it help the work personnel to accurately and efficiently identify the risk source in advance, but also can reduce the on-site investigation, and improve the accuracy and efficiency of reverse power supply.

[0063] During the operation, the MIS system, the electric energy collection system, the GIS system and the like can also be used to monitor whether the reverse power supply risk user is reverse power supply in real time and to intelligently remind the operator to take safety measures one by one.

[0064] After the operation is completed, the intelligent cloud system or the 95598 system can be used to send the operation completion and the power supply recovery information to the user in time, and to remind the user to follow the relevant safety regulations and to standardize the operation of the self-provided power supply, the disconnection of the dual / multiple power supply, the normal power consumption and the safety operation process of the new energy power generation and grid connection.

[0065] At the same time, the grounding protection device is arranged on the line connection end of the user with the reverse power supply risk.

[0066] In actual use, the MIS system can be directly operated according to the information registered by the relevant user to realize the addition, correction and deletion of the relevant information records in the reverse power supply potential user list.

[0067] When the power grid equipment is operated, the device to be operated is first disconnected, and the handheld terminal is used to check whether the operating device is live.

[0068] The electric energy collection system can also be used to monitor the reverse power supply of the device position in the power grid, and the electric energy collection system feeds back the reverse power supply signal to the handheld terminal, which indicates that the user end of the operating device is live.

[0069] If the user end of the operating device is not live, it is safe and no mistake is made, and the normal related operation is continued.

[0070] If the user end of the operating device is live, it indicates that there is reverse power supply.

[0071] The handheld terminal is used to download the reverse power supply potential user list in the node range of the power grid operating device, and the corresponding user and the user area and the distribution network line of the live port node on the reverse power supply potential user list are checked one by one.

[0072] When the user with reverse power supply is on the reverse power supply potential user list, the corresponding user is contacted to explain the problem and to disconnect the power supply line of the user, the safety operation of the power grid equipment is prioritized, and after the related problem is found and solved in the user end, the power supply line is reconnected.

[0073] When the user with reverse power supply is not on the reverse power supply potential user list, the handheld terminal is used to upload the user live number, and the power supply line of the user end is disconnected, and the related operation of the power grid equipment is prioritized.

[0074] Secondly, according to the verification work issued by the MIS system, contact the corresponding users, eliminate the hidden dangers of reverse power transmission and solve them properly, publicize the hidden dangers and safety knowledge of reverse power transmission of self-contained power supplies to users, and finally reconnect the power supply line. At the same time, upload the user's power type and user power number to the MIS system through the handheld terminal and store the relevant information in the potential reverse power user list.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention and are not limiting. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in this field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A smart cloud-based system for preventing and controlling reverse power transmission, characterized by: It includes an MIS system user profile information management terminal, the MIS system is mounted with a list of potential users of reverse power transmission, and the MIS system realizes data interaction with the handheld terminal through a communication module. The list of potential reverse power users includes user number, reverse power source type, user area and distribution network line division, user terminal actual address, and user contact information. The handheld terminal is used to download the list of potential users of reverse power transmission from the MIS system. The handheld terminal is used for on-site power testing and uploading the user's power number of the user end to the MIS system; The MIS system sends a back-feed danger reminder to the corresponding user based on the user's power number uploaded by the handheld terminal, and at the same time sends a user verification task to the handheld terminal. The task requires verifying the user's power type and publicizing the hidden dangers and safety knowledge of back-feeding of self-provided power to the user. The verified user power type is uploaded through the handheld terminal. The MIS system retrieves and copies the user's power type and user power number uploaded by the handheld terminal and uploads them to the list of potential users of back-feeding.

2. The intelligent cloud-based system for preventing and controlling reverse power transmission according to claim 1, characterized in that: The handheld terminal stores information including PMS lines, substations, and user distribution rooms. The handheld terminal is connected to an electric energy collection system. The electric energy collection system is set on the user side and sends the voltage and flow direction information monitored at the user side to the handheld terminal. The handheld terminal is equipped with a wireless communication chip, and the electric energy collection system includes a smart meter or a current detector.

3. The intelligent cloud-based system for preventing and controlling reverse power transmission according to claim 2, characterized in that: The communication module is a signal base station connected to the wireless communication chip, and an open data transmission protocol interface is provided on the signal base station.

4. The intelligent cloud-based system for preventing and controlling reverse power transmission according to claim 1, characterized in that: The reverse power supply types include dual power users, energy storage users, distributed photovoltaic users, and self-provided power users.

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