CN218498872U

CN218498872U - DTU data acquisition system

Info

Publication number: CN218498872U
Application number: CN202222212468.XU
Authority: CN
Inventors: 林国伟; 严永生; 马建春; 高有伦
Original assignee: Aerospace Yinshan Electric Co ltd
Current assignee: Aerospace Yinshan Electric Co ltd
Priority date: 2022-08-22
Filing date: 2022-08-22
Publication date: 2023-02-17
Anticipated expiration: 2032-08-22

Abstract

The utility model discloses a DTU data acquisition system relates to electrical equipment technical field. The DTU data acquisition system comprises a control unit, an analog-to-digital conversion unit and a plurality of interval units; the control unit comprises a CPU processor and an FSMC controller, wherein the FSMC controller is electrically connected with the CPU processor; the analog-to-digital conversion unit is electrically connected with the FSMC controller; each interval unit is respectively and electrically connected with the analog-to-digital conversion unit and the FSMC controller. According to the utility model discloses a DTU data acquisition system connects a plurality of interval units through using the FSMC controller in the control unit, and to a great extent simplifies the complexity of system data acquisition link, improves the real-time of data acquisition rate and system, reduces the rate of utilization of CPU treater and MCU's IO mouth quantity, also provides very favorable condition for the follow-up more interval units of extension of system.

Description

DTU data acquisition system

Technical Field

The utility model belongs to the technical field of the electrical equipment technique and specifically relates to a DTU data acquisition system is related to.

Background

The centralized DTU (station terminal) is widely applied to a power distribution network switching station, a ring network unit, a distribution room and a box-type substation, and can realize remote signaling, remote measurement, remote control, protection and feeder automation functions of a plurality of line intervals.

In the application of a centralized DTU, a plurality of line interval units are needed, each interval unit is provided with 8-path remote signaling data and 4-path current measurement data, and the sampling data volume is large; when a plurality of interval units work simultaneously, the MCU responsible for data acquisition has a higher occupancy rate, and usually the MCU with a higher main frequency and more IO ports needs to be selected, which results in higher system cost, higher difficulty in subsequently expanding more interval units, and poor system expansibility.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a DTU data acquisition system.

According to the utility model discloses DTU data acquisition system, include:

the control unit comprises a CPU processor and an FSMC controller, wherein the FSMC controller is electrically connected with the CPU processor;

the analog-to-digital conversion unit is electrically connected with the FSMC controller;

a plurality of spacer units, each of the spacer units being electrically connected to the analog-to-digital conversion unit and the FSMC controller, respectively.

According to some embodiments of the present invention, the power supply unit is electrically connected to the control unit.

According to some embodiments of the invention, the power supply unit comprises:

a protection filter circuit;

and the input end of the DC-DC module is electrically connected with the protection filter circuit, and the output end of the DC-DC module is electrically connected with the control unit.

According to some embodiments of the invention, the FSMC controller is electrically connected with the CPU processor through an AHB bus.

According to some embodiments of the present invention, the analog-to-digital conversion unit is provided with a parallel bus interface, through which the analog-to-digital conversion unit passes with the FSMC controller is electrically connected.

According to some embodiments of the invention, the spacer unit comprises:

the current transformer is electrically connected with the FSMC controller;

and the optical coupling isolation circuit is electrically connected with the FSMC controller.

According to some embodiments of the invention, a plurality of the spacer units are electrically connected to the FSMC controller by means of a parallel bus.

According to some embodiments of the invention, the interval units are different, and different parallel bus addresses are used.

According to the utility model discloses DTU data acquisition system has following beneficial effect at least: the interval unit provides an interface for external signals, is used for acquiring external signals such as remote signaling data and line current signals, and sending the remote signaling data to the FSMC controller and sending the line current signals to the analog-to-digital conversion unit; the analog-to-digital conversion unit is used for converting the line current signal from an analog signal to a digital signal and then sending the digital signal to the FSMC controller; the control unit comprises a CPU processor and an FSMC controller, and the FSMC controller sends the received signals to the CPU processor so that the CPU processor controls the working state of the system according to the signals. According to the utility model discloses DTU data acquisition system, through using FSMC controller to connect a plurality of interval units in the control unit inside, simplify the complexity of system data acquisition link to a great extent, improve the real-time of data acquisition rate and system, reduce the rate of utilization of CPU treater and MCU's IO mouth quantity, also provide very favorable condition for the more interval units of the follow-up extension of system; therefore, the utility model discloses DTU data acquisition system has advantages such as with low costs, the integrated level is high, the real-time is good, small.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural diagram of a DTU data acquisition system according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a power supply unit according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of an analog-to-digital conversion unit according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a spacing unit according to an embodiment of the present invention;

reference numerals:

the control unit 100, the CPU processor 110, the FSMC controller 120, the analog-to-digital conversion unit 200, the spacing unit 300, the current transformer 310, the optical coupling isolation circuit 320, the power supply unit 400, the protection filter circuit 410 and the DC-DC module 420.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, a plurality of meanings are one or more, a plurality of meanings are two or more, and the terms greater than, smaller than, exceeding, etc. are understood as excluding the number, and the terms greater than, lower than, within, etc. are understood as including the number. If there is a description of first and second for the purpose of distinguishing technical features only, this is not to be understood as indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the terms such as setting, installing, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meaning of the terms in the present invention by combining the specific contents of the technical solution.

Interpretation of terms:

DTU: a Data Transfer Unit, a Data Transfer Unit; the DTU (delay tolerant unit), namely switching station terminal equipment, is generally installed at a conventional switching station, an outdoor small-sized switching station, a ring main unit, a small-sized substation, a box-type substation and the like, and is used for collecting and calculating position signals, voltage, current, active power, reactive power, power factors, electric energy and other data of the switching equipment, performing switching-on and switching-off operation on a switch, and realizing fault identification and isolation of a feeder switch and recovery power supply of a non-fault section;

and (3) FSMC: a Flexible Static Memory Controller, a Flexible Static Memory Controller;

AHB: advanced High Performance Bus.

As shown in fig. 1, the DTU data acquisition system according to the embodiment of the present invention includes a control unit 100, an analog-to-digital conversion unit 200, and a plurality of spacing units 300; the control unit 100 comprises a CPU processor 110 and an FSMC controller 120, wherein the FSMC controller 120 is electrically connected with the CPU processor 110; the analog-to-digital conversion unit 200 is electrically connected with the FSMC controller 120; each of the spacing units 300 is electrically connected to the analog-to-digital conversion unit 200 and the FSMC controller 120, respectively.

The interval unit 300 provides an interface for external signals, and is configured to acquire external signals such as remote signaling data and line current signals, send the remote signaling data to the FSMC controller 120, and send the line current signals to the analog-to-digital conversion unit 200; the analog-to-digital conversion unit 200 is configured to convert the line current signal from an analog signal to a digital signal and send the digital signal to the FSMC controller 120; the control unit 100 includes a CPU processor 110 and an FSMC controller 120, and the FSMC controller 120 transmits the received signals to the CPU processor 110, so that the CPU processor 110 controls the operating state of the system according to the signals. Wherein, the utility model discloses the control unit 100 indicates MCU, connects a plurality of interval units 300 through using FSMC controller 120 at MCU inside, and to a great extent simplifies the complexity of system data acquisition link, improves the real-time of data acquisition speed and system, reduces CPU treater 110's the rate of utilization and MCU's IO mouth quantity, also provides very favorable condition for the follow-up more interval units 300 of extension of system. Therefore, the utility model discloses DTU data acquisition system has advantages such as with low costs, the integrated level is high, the real-time is good, small.

As shown in fig. 1, in some embodiments of the present invention, the DTU data acquisition system further includes a power supply unit 400, the power supply unit 400 is electrically connected to the control unit 100, and the power supply unit 400 is responsible for supplying power to the entire system.

As shown in fig. 2, in some embodiments of the present invention, the power supply unit 400 includes a protection filter circuit 410 and a DC-DC module 420, an input terminal of the DC-DC module 420 is electrically connected to the protection filter circuit 410, and an output terminal of the DC-DC module 420 is electrically connected to the control unit 100. The protection filter circuit 410 may adopt a common overvoltage/overcurrent protection circuit and a common filter circuit, and detect and filter an externally provided power signal, and then send the power signal to the DC-DC module 420, so as to convert the external power signal into a power signal required by the system (for example, convert a 24V power into a stable 5V power), and supply power to the system.

As shown in fig. 1, in some embodiments of the present invention, the FSMC controller 120 is electrically connected to the CPU processor 110 via a high-speed bus in the AHB chip, so as to realize efficient real-time transmission of data.

In some embodiments of the present invention, the analog-to-digital conversion unit 200 is provided with a parallel bus interface, and the analog-to-digital conversion unit 200 is electrically connected to the FSMC controller 120 through the parallel bus interface. As shown in fig. 3, in some examples, the analog-to-digital conversion unit 200 includes two analog-to-digital conversion chips (model including but not limited to AD 7616), and the analog-to-digital conversion unit 200 is connected to n (n is a positive integer) current signal output ports of the spacing unit 300, converts the 4 × n analog signals into digital signals, and sends the digital signals to the FSMC controller 120 of the control unit 100 in a parallel bus manner.

As shown in fig. 4, in some embodiments of the present invention, the spacing unit 300 includes a current transformer 310 and an optical coupling isolation circuit 320, and both the current transformer 310 and the optical coupling isolation circuit 320 are electrically connected to the FSMC controller 120. The current transformer 310 is configured to convert an externally input current signal into a voltage signal, and send the voltage signal to the analog-to-digital conversion unit 200; the optical coupler isolation circuit 320 is used for receiving and isolating an external remote signaling input signal, and then sending the remote signaling input signal to the FSMC controller 120.

In some embodiments of the present invention, a plurality of bay units 300 are electrically connected to the FSMC controller 120 by way of parallel buses, and different bay units 300 use different parallel bus addresses, but use the same parallel bus data signals, thereby improving data acquisition efficiency and system real-time performance.

According to the utility model discloses DTU data acquisition system, through using FSMC parallel bus technique, to a great extent simplify the complexity of system data acquisition link, improve data acquisition rate, reduce CPU processor 110's rate of utilization, reduce system cost; as well as providing greater convenience for expanding the number of subsequent spacing units 300.

In the description herein, references to the description of the term "one embodiment," "a further embodiment," "some specific embodiments," or "some examples," etc., mean that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A DTU data acquisition system, comprising:

a plurality of interval units, each of which is electrically connected with the analog-to-digital conversion unit and the FSMC controller respectively; the interval units are electrically connected with the FSMC controller in a parallel bus mode, and different interval units adopt different parallel bus addresses;

the spacing unit includes:

the current transformer is electrically connected with the FSMC controller;

2. The DTU data acquisition system of claim 1, further comprising a power supply unit, the power supply unit being electrically connected to the control unit.

3. The DTU data acquisition system of claim 2, wherein the power supply unit comprises:

a protection filter circuit;

4. The DTU data acquisition system of claim 1, wherein the FSMC controller is electrically connected to the CPU processor via an AHB bus.

5. The DTU data acquisition system of claim 1, wherein the analog-to-digital conversion unit is provided with a parallel bus interface, and the analog-to-digital conversion unit is electrically connected to the FSMC controller through the parallel bus interface.