CN111064078A

CN111064078A - Flexible and reliable power distribution terminal

Info

Publication number: CN111064078A
Application number: CN201911410740.1A
Authority: CN
Inventors: 陈羽; 彭克; 张新慧; 王敬华
Original assignee: Shandong University of Technology
Current assignee: Shandong University of Technology
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-04-24

Abstract

The invention discloses a flexible and reliable power distribution terminal which comprises a data acquisition module, a data processing module and a CPU controller, wherein the data acquisition module comprises an FPGA device, the FPGA device reads state quantity data latched by a shift register through a serial data line, the data acquisition module is connected with power distribution equipment, the data processing module is connected with the data acquisition module, and the CPU controller is connected with the data processing module.

Description

Flexible and reliable power distribution terminal

Technical Field

The invention relates to the technical field of power distribution terminals, in particular to a flexible and reliable power distribution terminal.

Background

The distribution terminal quantity is wide in multiple aspects, and the distribution terminal quantity is applied to various occasions such as an opening and closing station, a distribution station, a box-type substation, a ring main unit, a column switch, a recloser, a boundary switch, a distribution transformer and the like, and the performance and the reliability of the distribution terminal quantity have decisive influence on the performance and the stable operation of the whole distribution network wide area measurement and control system. Along with the development of a power distribution network, the conventional power distribution terminal cannot meet the requirement of power distribution automation, the conventional power distribution terminal is poor in configuration convenience and inconvenient to expand, and the hardware design is redundant, so that various actual conditions cannot be met.

Disclosure of Invention

This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.

The present invention has been made in view of the above-mentioned problems with the conventional flexible and reliable power distribution terminal.

Therefore, the invention aims to provide a flexible and reliable power distribution terminal, which utilizes an FPGA device to design a data acquisition module, is flexible in sampling, and reads state quantity data latched by a parallel/serial shift register through a serial data line, thereby reducing the number of connecting lines among modules and increasing the reliability.

In order to solve the technical problems, the invention provides the following technical scheme: this nimble reliable distribution terminal includes data acquisition module, data processing module and CPU controller, data acquisition module includes the FPGA device, the FPGA device reads the state quantity data that shift register latched through serial data line, distribution equipment is connected to the data acquisition module, data processing module connects the data acquisition module, CPU controller connection data processing module.

As a preferred embodiment of the flexible and reliable power distribution terminal of the present invention, wherein: one end of the FPGA device is connected to the data processing module, and the other end of the FPGA device is connected with the first port of the shift register.

As a preferred embodiment of the flexible and reliable power distribution terminal of the present invention, wherein: the second port of the shift register is directly connected with the data processing module by using a 2-dimensional DMA mode.

As a preferred embodiment of the flexible and reliable power distribution terminal of the present invention, wherein: the data acquisition module also comprises a switching value input module.

As a preferred embodiment of the flexible and reliable power distribution terminal of the present invention, wherein: the light-emitting quantity input module is connected to the CPU controller through a serial interface.

As a preferred embodiment of the flexible and reliable power distribution terminal of the present invention, wherein: the CPU controller is connected with an interface module, and the interface module comprises an Ethernet port, a USB maintenance port, an RS232 port, a program debugging console port and a CAN bus port.

As a preferred embodiment of the flexible and reliable power distribution terminal of the present invention, wherein: the interface module is connected with the CPU controller in a level conversion mode.

As a preferred embodiment of the flexible and reliable power distribution terminal of the present invention, wherein: the CPU controller is also connected with a power module.

The invention has the beneficial effects that: the invention adopts the sampling module which takes the FPGA as the core, and the FPGA reads the state quantity data latched by the parallel/serial shift register through the serial data line in addition to flexible analog quantity sampling, thereby reducing the number of connecting lines among the modules and increasing the reliability. The sampled data are directly stored in the data memory in sequence by utilizing a 2-dimensional DMA mode, so that the CPU occupancy rate is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:

fig. 1 is a block diagram of a flexible and reliable power distribution terminal according to an embodiment 1 of the present invention.

Fig. 2 is a block diagram of an embodiment 2 of the flexible and reliable power distribution terminal of the present invention.

Fig. 3 is a block diagram of the flexible and reliable power distribution terminal according to embodiment 3 of the present invention.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Furthermore, the present invention is described in detail with reference to the drawings, and in the detailed description of the embodiments of the present invention, the cross-sectional view illustrating the structure of the device is not enlarged partially according to the general scale for convenience of illustration, and the drawings are only exemplary and should not be construed as limiting the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.

Example 1

Referring to fig. 1, for the first embodiment of the present invention, a flexible and reliable power distribution terminal is provided, the flexible and reliable power distribution terminal includes a data acquisition module 100, a data processing module 200, and a CPU controller 300, the data acquisition module 100 includes an FPGA device 101, the FPGA device 101 reads state quantity data latched by a shift register 102 through a serial data line, the data acquisition module 100 is connected to a power distribution device, the data processing module 200 is connected to the data acquisition module 100, and the CPU controller is connected to the data processing module 200. The data processing module 200 of the present invention is used for performing digital-to-electrical conversion on the received sensor information, and may adopt a PCF8591 module or other conversion modules that conform to the required signal information.

Specifically, one end of the FPGA device 101 is connected to the data processing module 200, the other end of the FPGA device 101 is connected to the first port of the shift register 102, and the second port of the shift register 102 is directly connected to the data processing module 200 by using a 2-dimensional DMA mode.

The data acquisition module 100 further comprises a switching value input module 103, and the switching value input module 103 is connected to the CPU controller 300 through a serial interface 104.

The CPU controller 300 of the present invention is also connected to a power module 302.

The hardware of the device adopts a modularized overall structure, adopts a high-performance digital signal processor and a large-scale field programmable logic array FPGA high-performance device, has strong real-time signal processing capacity, and meets the relatively complex functions of peer-to-peer communication, system management, man-machine interaction and the like of a wide area measurement and control system of the intelligent power distribution network. The FPGA controls the switching of the multi-way switch and the ADC sampling time sequence according to the set channel number and the sampling rate, and the data of the ADC is directly sent to the processor through the high-speed serial port. The FPGA latches the state quantity at the same time, then reads the state quantity into an internal register in a serial mode, and then sends the state quantity to the processor according to the time sequence of a high-speed serial port connected with the processor. The two high-speed serial ports adopt a DMA mode, and interrupt and inform the processor to process data after receiving a certain amount of data.

Example 2

Referring to fig. 2, a second embodiment of the present invention, which is different from the first embodiment, is: the CPU controller 300 is connected to an interface module 301, and the interface module 301 is connected to the CPU controller 300 by level conversion. The interface module 301 includes an ethernet port 301a, a USB maintenance port 301b, an RS232 port 301c, a program debug console port 301d, and a CAN bus port 301 e.

Compared with embodiment 1, further, the flexible and reliable power distribution terminal comprises a data acquisition module 100, a data processing module 200 and a CPU controller 300, wherein the data acquisition module 100 comprises an FPGA device 101, a serial data line of the FPGA device 101 reads state quantity data latched by a shift register 102, the data acquisition module 100 is connected with power distribution equipment, the data processing module 200 is connected with the data acquisition module 100, and the CPU controller is connected with the data processing module 200. The data processing module 200 of the present invention is used for performing digital-to-electrical conversion on the received sensor information, and may adopt a PCF8591 module or other conversion modules that conform to the required signal information.

The CPU controller 300 is connected with an interface module 301, and the interface module 301 is connected with the CPU controller 300 in a level conversion mode. The interface module 301 includes an ethernet port 301a, a USB maintenance port 301b, an RS232 port 301c, a program debug console port 301d, and a CAN bus port 301 e. And a network maintenance interface and PC machine tool software are configured to support online configuration, program loading and unloading and device running state monitoring. The system is provided with an Ethernet communication port, supports network communication protocols such as IEC60870-5-104 and the like, realizes high-speed data transmission and WEB service, and can remotely upgrade programs. The terminal is provided with an EIA/RS-232 communication port and supports a plurality of communication protocols such as IEC60870-5-101, DNP3.0, SC1801, MODBUS and the like. The intelligent switching station is provided with a CAN field bus interface, and a plurality of intelligent terminals CAN be networked by twisted-pair wires, optical fibers or other types of communication media through the interface to form a distributed switching station and a ring main unit terminal device. The system is provided with a network maintenance port and is used for uploading and downloading configuration mode words and application programs, upgrading and updating programs and inquiring historical data. The flexible communication networking scheme is suitable for various communication modes (optical fibers, audio cables, power distribution carriers, wireless networks, mobile public networks and the like). The online configuration function supports remote and local configuration modes, and configuration and maintenance are convenient. Communication parameter configuration: IP address, station address, baud rate, check bit, stop bit, etc.

The rest of the structure is the same as that of embodiment 1.

Example 3

Referring to fig. 3, a third embodiment of the present invention is different from the second embodiment in that: the CPU controller 300 is also connected with a display module 400.

Compared with embodiment 2, further, the flexible and reliable power distribution terminal comprises a data acquisition module 100, a data processing module 200 and a CPU controller 300, wherein the data acquisition module 100 comprises an FPGA device 101, a serial data line of the FPGA device 101 reads state quantity data latched by the shift register 102, the data acquisition module 100 is connected with power distribution equipment, the data processing module 200 is connected with the data acquisition module 100, and the CPU controller is connected with the data processing module 200. The data processing module 200 of the present invention is used for performing digital-to-electrical conversion on the received sensor information, and may adopt a PCF8591 module or other conversion modules that conform to the required signal information.

The CPU controller 300 of the present invention is further connected to a power module 302 and a display module 400, wherein the power module 302 is a storage battery or a super capacitor, and the display module 400 is a liquid crystal display.

The rest of the structure is the same as that of embodiment 2.

It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.

Claims

1. A flexible and reliable power distribution terminal, characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,

the data acquisition module (100) comprises an FPGA device (101), the FPGA device (101) reads state quantity data latched by a shift register (102) through a serial data line, and the data acquisition module (100) is connected with power distribution equipment;

the data processing module (200), the data processing module (200) is connected with the data acquisition module (100);

a CPU controller (300) connected to the data processing module (200).

2. The flexible and reliable power distribution terminal of claim 1, wherein: one end of the FPGA device (101) is connected to the data processing module (200), and the other side of the FPGA device (101) is connected with a first port of the shift register (102).

3. The flexible and reliable power distribution terminal of claim 2, wherein: the second port of the shift register (102) is directly connected to the data processing module (200) using a 2-dimensional DMA mode.

4. A flexible and reliable power distribution terminal according to claim 2 or 3, characterized in that: the data acquisition module (100) further comprises a switching value input module (103).

5. The flexible and reliable power distribution terminal of claim 4, wherein: the light-on quantity input module (103) is connected to the CPU controller (300) through a serial interface (104).

6. The flexible and reliable power distribution terminal of claim 4 or 5, wherein: the CPU controller (300) is connected with an interface module (301), and the interface module (301) comprises an Ethernet port (301a), a USB maintenance port (301b), an RS232 port (301c), a program debugging console port (301d) and a CAN bus port (301 e).

7. The flexible and reliable power distribution terminal of claim 6, wherein: the interface module (301) is connected with the CPU controller (300) in a level conversion mode.

8. The flexible reliable power distribution terminal of claim 7, wherein: the CPU controller (300) is also connected with a power supply module (302).