Ring main unit protection, measurement and control integrated device

Abstract

The utility model discloses a ring main unit protection, measurement and control integrated device, and relates to the technical field of digital measurement and control integrated machines. The device comprises a main control unit and a sensing unit. The protection, measurement and control integrated device for the ring main unit adopts a modular extensible design and is composed of a main control unit, sensing units, aviation plug cables and the like, each module adopts an embedded design and is connected through a one-to-two network cable, one digital main control unit is connected with eight digital sensing units at most, and the digital sensing units are connected with the digital main control unit at most. Reasonable and orderly access of the distributed power supply is promoted, safe and reliable operation of the power distribution network is realized, real-time monitoring and control of power grid operation are realized, the intelligent level and the operation efficiency of a power system are improved, and the safety and the reliability of a power supply system are enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of digital integrated measurement and control machines, in particular to a ring network cabinet protection measurement and control integrated device. Background Art

[0002] The integrated device for power protection and measurement and control integrates protection, measurement and control functions into the same device, realizing information sharing and collaborative operation, which can effectively improve the operating efficiency and reliability of the system. The integrated device for power protection and measurement and control functions is generally installed in the ring main unit and can protect the use of the distribution network in the ring main unit.

[0003] Driven by the "dual carbon" strategy, more and more distributed power sources are connected to the distribution network. With the continuous improvement of DER (Distributed Energy Resource) penetration rate, the capacity of DER on some lines even exceeds the maximum load. DER is connected to the distribution network at a high proportion, and it is impossible to monitor and collect data of the power system in real time, and thus it is impossible to reasonably allocate electricity between regions, resulting in poor overall distribution stability of the distribution network and great dispatching pressure on the dispatching center, leading to unstable power supply in different regions, prone to power outages and other problems, and poor safety during equipment operation. In view of the shortcomings of the existing technology, we propose a ring network cabinet protection, measurement and control integrated device to solve the above problems. Utility Model Content

[0004] In view of the shortcomings of the prior art, the utility model provides an integrated protection, measurement and control device for a ring main unit, which solves the problem that when too many distributed power sources are connected to the distribution network, the overall distribution pressure of the distribution network is large, the load it bears cannot be reasonably distributed, and the power between regions cannot be reasonably allocated, resulting in poor power safety.

[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: a ring network cabinet protection measurement and control integrated device, including:

[0006] The main control unit comprises a first housing, a first main control board arranged at one side of the first housing, and a first aviation plug arranged at one side of the first housing;

[0007] The sensing unit is connected to the main control unit, and the sensing unit includes a second shell, a second main control board arranged at one side of the second shell, and a second aviation plug arranged at one side of the second shell.

[0008] Preferably, one side of the first housing is provided with a plurality of debugging serial ports for configuring cable connections.

[0009] Preferably, a first display screen is provided on one side of the first main control board.

[0010] Preferably, a second display screen is disposed on an upper portion of one side of the second main control board, and a control unit is disposed on a lower portion of one side of the second main control board.

[0011] Preferably, an embedded plate is disposed on one end outer wall of the first shell and the second shell.

[0012] The utility model discloses an integrated protection, measurement and control device for a ring main unit, which has the following beneficial effects: the integrated protection, measurement and control device for a ring main unit adopts a modular and expandable design, and is composed of a main control unit, a sensor unit, an aerial plug cable and other components. Each module adopts an embedded design, and the modules are connected by a one-to-two network cable. A digital main control unit can connect up to eight digital sensor units, thereby promoting the reasonable and orderly access of distributed power sources, realizing the safe and reliable operation of the distribution network, and realizing real-time monitoring and control of the power grid to improve the operation of the power grid, thereby improving the intelligence level and operation efficiency of the power system, and enhancing the safety and reliability of the power supply system. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 This is a front view of the main control unit structure of the utility model;

[0015] Figure 2 This is a side view of the main control unit structure of the utility model;

[0016] Figure 3 This is a schematic diagram of the back structure of the main control unit of the utility model;

[0017] Figure 4 This is a front view of the sensor unit structure of the utility model;

[0018] Figure 5 This is a side view of the sensor unit structure of the utility model;

[0019] Figure 6 This is a schematic diagram of the back structure of the sensor unit of the utility model;

[0020] Figure 7 This is a schematic diagram of the communication block diagram structure of the utility model system.

[0021] In the figure: 1. first shell; 11. first main control board; 12. first display screen; 13. debugging serial port; 14. first aviation plug; 2. second shell; 21. second main control board; 22. control unit; 23. second display screen; 24. second aviation plug; 3. embedded board. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model is described clearly and completely. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] The embodiment of the utility model provides an integrated protection, measurement and control device for a ring main unit, which solves the problem that when too many distributed power sources are connected to the distribution network, the overall distribution pressure of the distribution network is large, the load on it cannot be reasonably distributed, and the power between regions cannot be reasonably allocated, resulting in poor power safety. The utility model adopts a modular and expandable design, which is composed of a main control unit, a sensor unit, an aviation plug cable and other components. Each module adopts an embedded design, and the modules are connected by a one-to-two network cable. One digital main control unit can connect to a maximum of eight digital sensor units, which promotes the reasonable and orderly access of distributed power sources and realizes safe and reliable operation of the distribution network.

[0024] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0025] The utility model discloses a ring network cabinet protection measurement and control integrated device according to Figure 1-Figure 7 ,include:

[0026] Reference Figure 1-Figure 3As shown, the main control unit is connected to the sensor unit internally and provides various interfaces externally, such as multiple groups of debugging serial ports 13 and the first aviation plug 14. The main control unit mainly completes data acquisition, data processing and communication with the outside world. The main control unit adopts the advanced SylixOS real-time multi-task embedded operating system, and adopts a quad-core processor T3 with a main frequency of 1.2GHz, a DDR of 1GB, and an EMMC of 8GB. All components of the main control unit adopt industrial-grade chips and boards. The maximum amount of remote signaling collected by the main control unit is 4 remote signaling quantities. The main control unit includes a first shell 1, a first main control board 11 arranged on one side of the first shell 1, and a first aviation plug 14 arranged on one side of the first shell 1. The first aviation plug 14 is used for external wiring. A first display screen 12 is arranged on one side of the first main control board 11. The first display screen 12 is a liquid crystal panel. Multiple groups of debugging serial ports 13 for connecting cables are opened on one side of the first shell 1. Local and remote debugging can be performed through the debugging serial port 13, an encrypted Bluetooth port or Ethernet.

[0027] Reference Figure 4-Figure 6 As shown, the sensing unit collects the current, voltage and telemetering quantity in the compartment cabinet and outputs the remote control command. It has the functions of local operation, serial communication, anti-jump, etc. The sensing unit collects a maximum of 16 telemetering quantities, of which 6 telemetering quantities are standard and the other 10 telemetering quantities are optional. The sensing unit is connected to the main control unit. The sensing unit includes a second shell 2, a second main control board 21 arranged on one side of the second shell 2, and a second aviation plug 24 arranged on one side of the second shell 2. The second aviation plug 24 is used for external wiring. For details, refer to the attached Figure 4 A second display screen 23 and a switch are provided on the upper part of one side of the second main control board 21, a control unit 22 is provided on the lower part of one side of the second main control board 21, and an indicator light is provided on the second main control board 21 to facilitate debugging and maintenance by maintenance personnel.

[0028] Reference Figure 1 and Figure 4 The outer walls of one end of the first shell 1 and the second shell 2 are both provided with an embedded plate 3. The first shell 1 and the second shell 2 are both embedded and installed in the chassis through the embedded plate 3. When installed in the ring network cabinet, the structure is compact and small, the shell is sealed, and it has dustproof and rainproof functions.

[0029] The main control unit and the sensor unit are both digital units. The digital main control unit and the digital sensor unit form the required digital measurement and control integrated machine, which has rich self-diagnosis functions and supports board-level self-test, mutual test and self-recovery functions. Virtual remote signaling is used to upload software and hardware failures. The digital measurement and control integrated machine is designed to meet the primary and secondary integration ring network box of the State Grid. The digital measurement and control integrated machine is installed in the secondary room of the ring network cabinet, inside the ring network cabinet and box-type substation of the distribution network feeder loop. A digital main control unit can connect up to eight digital sensor units. The device is fully equipped It can realize the basic collection function, measurement and control and fault handling function, line loss measurement function, distributed feeder automation function, conventional protection, management function, timing and positioning function and safety function of the eight intervals of the primary and secondary integrated ring network box. For example, it can communicate with the upper station, send the collected and processed information upward and receive the command of the upper station, communicate with the lower station, collect and forward the data of intelligent devices such as network tables, DC panels and protection management machines, support active registration of terminals, support optical fiber communication with the same equipment, and complete optical fiber differential functions.

[0030] Reference Figure 7 The main control unit supports up to 8 bay units. The main control and bays exchange data through the BiFt3 protocol. The BiFt3 protocol is encoded and decoded by the FPGA of the main control and bays. The main control CPU is maintained by a PC locally. The digital sensor unit is not directly maintained locally. The PC-side maintenance is applicable to all local maintenance situations. The main control CPU, main control FPGA, and digital sensor peripheral communication port settings are maintained by directly connecting to the main control CPU. The upgrade of the digital sensor unit FPGA is maintained through its own maintenance port. The handheld Bluetooth is suitable for on-site operation and maintenance operations such as transmission and parameter modification. The main control CPU in the main control unit is connected to the distribution automation master station through the real-time channel and the management channel, and the relevant data can be transmitted through the distribution automation master station. The data is transmitted to the data middle platform, and the data middle platform can transmit the data to the Internet of Things platform. At the same time, the situation of the main control unit can also be understood and managed in real time through the Internet of Things platform, so that through real-time monitoring and data collection of the power system, problems in the power system can be discovered in time and corresponding processing can be carried out. At the same time, through the analysis and processing of the power system data, the operating efficiency and reliability of the power system can be improved, the automatic removal of power grid faults and the input of backup power supplies can be realized, the deployment efficiency can be improved, the scope of power outages can be reduced, the power outage time can be reduced, the operating pressure of the dispatching center can be reduced, the response speed of the power system can be improved, and the switching of distributed power sources in the power grid can be controlled through digital means to ensure the safety of people and equipment, improve power supply reliability, and promote the reasonable and orderly access of distributed power sources.

[0031] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A ring main unit protection, measurement and control integrated device, characterized in that: include: A main control unit comprises a first housing (1), a first main control board (11) arranged on one side of the first housing (1), and a first aviation plug (14) arranged on one side of the first housing (1); A sensor unit is connected to the main control unit, the sensor unit comprising a second housing (2), a second main control board (21) arranged on one side of the second housing (2), and a second aviation plug (24) arranged on one side of the second housing (2).

2. The ring main unit protection, measurement and control integrated device according to claim 1, characterized in that: One side of the first housing (1) is provided with a plurality of groups of debugging serial ports (13) for configuring cable connections.

3. The ring main unit protection, measurement and control integrated device according to claim 2, characterized in that: A first display screen (12) is provided on one side of the first main control board (11).

4. The ring main unit protection, measurement and control integrated device according to claim 1, characterized in that: A second display screen (23) is provided on an upper portion of one side of the second main control board (21), and a control unit (22) is provided on a lower portion of one side of the second main control board (21).

5. The ring main unit protection, measurement and control integrated device according to claim 1, characterized in that: An embedded plate (3) is provided on one end outer wall of the first shell (1) and the second shell (2).

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