CN212304865U

CN212304865U - Intelligent direct current automatic protection switching device

Info

Publication number: CN212304865U
Application number: CN202021237504.2U
Authority: CN
Inventors: 孟祥海; 刘亮
Original assignee: DALIAN LVSHUN POWER AND ELECTRONIC EQUIPMENT CO LTD
Current assignee: DALIAN LVSHUN POWER AND ELECTRONIC EQUIPMENT CO LTD
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2021-01-05
Anticipated expiration: 2030-06-30

Abstract

The invention discloses an intelligent direct current automatic protection switching device, relates to the field of direct current protection, and particularly relates to an intelligent direct current automatic protection switching device. Intelligent direct current automatic protection switching device, its characterized in that includes: the device comprises a background monitoring upper computer module (100), a monitoring host module (200), a first charging set module (300), a second charging set module (400), a direct current voltage and current acquisition module (500), a switching value acquisition and output module (600) and a public charging set module (700). Compared with the prior art, the automatic switching control device realizes intelligent protection, forms a one-use one-standby protection mode, and finally realizes continuous power supply of the direct current bus, thereby ensuring the normal operation of primary equipment of the transformer substation, and having reliable power supply, simple operation and convenient maintenance.

Description

Intelligent direct current automatic protection switching device

Technical Field

The invention relates to a direct current protection device, in particular to an intelligent direct current automatic protection switching device.

Background

At present, a large amount of equipment requiring direct current power supply is used in systems such as electric power, petrifaction, steel, medical health, fire fighting and the like. When the commercial power is cut off, the direct current power supply system is required to supply stable power, and the longer the power supply time is, the better the power supply time is.

In a transformer substation of 110KV or above, a primary device in the prior art usually adopts a direct-current power supply as an operating power supply of the device, the power supply stability of the direct-current power supply is particularly important, and when a direct-current charger runs, a fault often needs to be caused by manually operating an interconnection switch to perform interconnection power supply of two sections of buses.

Disclosure of Invention

In order to effectively solve the technical problems, the invention provides an intelligent direct current automatic protection switching device, which is characterized by comprising the following components: the device comprises a background monitoring host computer module, a first charger set module, a second charger set module, a direct current voltage and current acquisition module, a switching value acquisition output module and a common charger set module, wherein: the background monitoring host computer module is connected with the monitoring host computer module, and the monitoring host computer module is respectively connected with the first charging set module, the second charging set module, the direct-current voltage and current acquisition module, the switching value acquisition and output module and the public charging set module;

the direct current voltage current acquisition module includes: the novel module of direct current collection one and the novel module of direct current collection two, the switching value gathers output module and includes: data acquisition module, optoelectronic isolation module, singlechip, communication module, IO module, opto-coupler module, control module, data expansion module, wherein: the data acquisition module is connected with the photoelectric isolation module, the photoelectric isolation module is connected with the data expansion module, the data expansion module is connected with the singlechip, the singlechip is connected with the optocoupler module, the optocoupler module is connected with the communication module, the communication module is connected with the I/O module, and the I/O module is connected with the control module;

the control module includes: the system comprises a first contactor CZ01, a second contactor CZ02, a first manual switch ZK01, a second manual switch ZK02, a first switch ZK101, a second switch ZK102, a third switch ZK103, a first breaker G01, a second breaker G02, a third breaker G03, a first alternating current power supply mutual switching module HT1, a second alternating current power supply mutual switching module HT2, a third alternating current power supply mutual switching module HT3, a first lightning arrester B1, a second lightning arrester B2 and a third lightning arrester B3, wherein: the first contactor CZ01 and the first manual switch ZK01 are connected in parallel and then connected in series with the second switch ZK102, the second contactor CZ02 is connected in parallel and then connected in series with the second manual switch ZK02, the first switch ZK101 is connected in series with the first charger set module, the third switch ZK103 is connected in series with the second charger set module, the second switch ZK102 is connected with the common charger set module and the second breaker G02, the alternating current power supply mutual switching module II HT2 is sequentially connected in series, a second lightning arrester B2 is connected between the circuit breaker II G02 and the alternating current power supply mutual switching module II HT2, the first charger group module is sequentially connected in series with the circuit breaker I G01 and the alternating current power supply mutual switching module I HT1, a first lightning arrester B1 is connected between the circuit breaker I G01 and the alternating current power supply mutual switching module I HT1, the second charger group module is sequentially connected in series with the circuit breaker III G03 and the alternating current power supply mutual switching module III HT3, and a third lightning arrester B3 is connected between the circuit breaker III G03 and the alternating current power supply mutual switching module III HT 3.

According to above intelligent direct current automatic protection auto-change over device, its characterized in that: the optoelectronic isolation module includes: the photoelectric isolation element is TLP 521-4.

According to above intelligent direct current automatic protection auto-change over device, its characterized in that: the data expansion module includes: and the data expansion chip has the model of PCF 8574.

According to above intelligent direct current automatic protection auto-change over device, its characterized in that: the type of the single chip microcomputer is AT89C 2051.

According to above intelligent direct current automatic protection auto-change over device, its characterized in that: the optical coupling module includes: the optical coupler element is 6N 137.

According to above intelligent direct current automatic protection auto-change over device, its characterized in that: the communication module includes: the communication chip, the communication chip model is MAX 485.

Compared with the prior art, the automatic switching control device realizes intelligent protection, forms a one-use one-standby protection mode, and finally realizes continuous power supply of the direct current bus, thereby ensuring the normal operation of primary equipment of the transformer substation, and having reliable power supply, simple operation and convenient maintenance.

Drawings

Fig. 1 is a schematic structural diagram of an intelligent direct current automatic protection switching device.

Fig. 2 is a schematic structural diagram of a dc voltage and current acquisition module of the intelligent dc automatic protection switching device.

Fig. 3 is a schematic structural diagram of a control circuit of the intelligent direct current automatic protection switching device.

Detailed Description

The present embodiment will be further explained with reference to the accompanying drawings:

intelligent direct current automatic protection switching device, its characterized in that includes: the system comprises a background monitoring upper computer module 100, a monitoring host module 200, a first charging set module 300, a second charging set module 400, a direct current voltage and current acquisition module 500, a switching value acquisition output module 600 and a public charging set module 700, wherein: the background monitoring host computer module 100 is connected with the monitoring host computer module 200, and the monitoring host computer module 200 is respectively connected with the first charger set module 300, the second charger set module 400, the direct current voltage and current acquisition module 500, the switching value acquisition output module 600 and the public charger set module 700;

the dc voltage and current collecting module 500 includes: the novel module one of direct current collection and the novel module two of direct current collection, switching value acquisition output module 600 includes: data acquisition module 601, optoelectronic isolation module 602, singlechip 603, communication module 604, I/O module 605, opto-coupler module 606, control module 607, data expansion module 608, wherein: the data acquisition module 601 is connected with the photoelectric isolation module 602, the photoelectric isolation module 602 is connected with the data expansion module 608, the data expansion module 608 is connected with the single chip microcomputer 603, the single chip microcomputer 603 is connected with the optical coupling module 606, the optical coupling module 606 is connected with the communication module 604, the communication module 604 is connected with the I/O module 605, and the I/O module 605 is connected with the control module 607;

the control module 607 includes: the system comprises a first contactor CZ01, a second contactor CZ02, a first manual switch ZK01, a second manual switch ZK02, a first switch ZK101, a second switch ZK102, a third switch ZK103, a first breaker G01, a second breaker G02, a third breaker G03, a first alternating current power supply mutual switching module HT1, a second alternating current power supply mutual switching module HT2, a third alternating current power supply mutual switching module HT3, a first lightning arrester B1, a second lightning arrester B2 and a third lightning arrester B3, wherein: the first contactor CZ01 and the first manual switch ZK01 are connected in parallel and then connected in series with the second switch ZK102, the second contactor CZ02 is connected in parallel and then connected in series with the second manual switch ZK02, the first switch ZK101 is connected in series with the first charger set module 300, the third switch ZK103 is connected in series with the second charger set module 400, the second switch ZK102 is connected with the common charger set module 700 and the second breaker G02, the alternating current power supply mutual switching module II HT2 is sequentially connected in series, a second arrester B2 is connected between the circuit breaker II G02 and the alternating current power supply mutual switching module II HT2, the first charger group module 300, the circuit breaker I G01 and the alternating current power supply mutual switching module I HT1 are sequentially connected in series, a first arrester B1 is connected between the circuit breaker I G01 and the alternating current power supply mutual switching module I HT1, the second charger group module 400, the circuit breaker III G03 and the alternating current power supply mutual switching module III HT3 are sequentially connected in series, and a third arrester B3 is connected between the circuit breaker III G03 and the alternating current power supply mutual switching module III HT 3.

The optoelectronic isolation module 602 includes: the photoelectric isolation element is TLP 521-4.

The data expansion module 608 includes: and the data expansion chip has the model of PCF 8574.

The type of the single chip microcomputer 603 is AT89C 2051.

The optical coupling module 606 includes: the optical coupler element is 6N 137.

The communication module 604 includes: the communication chip, the communication chip model is MAX 485.

In the intelligent direct-current automatic protection switching device, a monitoring host module 200 is mainly responsible for displaying the working state and parameter setting of a system, the states of two sections of buses are judged by collecting the running state of a charger, the current and voltage of a direct-current bus and the switching value, and when the charger faults of a first charger set module 300 and a second charger set module 400 and the condition that the buses of the first charger set module 300 and the second charger set module 400 are powered off are judged, the contactors of the first charger set module 300 and the second charger set module 400 are subjected to switching control, so that the protection function of a public charger set module 700 is realized. The dc voltage and current collection module 500 is mainly responsible for the output of the dc charger and the voltage and current collection of the dc bus. The switching value acquisition and output module 600 acquires the states of the contactors of the first charger set module 300 and the second charger set module 400, and controls the contactor coils of the first charger set module 300 and the second charger set module 400 through the control module 607.

The direct current voltage and current acquisition module 500 is responsible for acquiring the current and voltage of a charger and a direct current bus which need to be monitored in the system, and transmitting the monitoring result to the monitoring host module 200 through an RS485 interface; the monitoring host module 200 sends the result to the background monitoring host module 100 for processing. The dc voltage and current collection module 500 mainly functions as a dc sampling circuit.

The switching value acquisition output module 600 is responsible for various nodes needing to be monitored in the system, such as: monitoring fuses, switches and the like, and sending monitoring results to the monitoring host module 200 through an RS485 interface; the monitoring host module 200 sends the result to the background monitoring host module 100 for processing, and meanwhile, the monitoring host module 200 transmits the relay control command issued by the background monitoring host module 100 to the module for execution. After the input signal is photoelectrically isolated, the data expansion chip PCF8574 of the data expansion module 608 passes the collected switching signal through I²The C bus is fed to a single chip 603 with the model AT89C 2051. The single chip microcomputer 603 sends the signal to the communication module 604 through the optical coupling module 606, and the communication module 604 transmits the collected switch information to the monitorAnd the monitoring host module 200 displays the states of the switches through the acquired information. Meanwhile, the monitoring host module 200 issues a switch command to the I/O module 605 through the communication module 604, and the I/O module 605 controls operations such as switching of the contactors of the first charger set module 300 and the second charger set module 400 through the control module 607. The number of chips of the I/O module 605 may be extended by address coding if needed by the system.

The control module 607 can realize local control, automatic protection and automatic remote control, and when the system is in an automatic protection state, the contactors of the first charger set module 300 and the second charger set module 400 are in a disconnection state, and the system normally operates. When the first charger set module 300 and the second charger set module 400 have faults, the system switches the buses of the first charger set module 300 and the second charger set module 400 into the common charger set module 700 by controlling the contactors of the first charger set module 300 and the second charger set module 400 according to the acquisition quantity analysis. The local control state requires the selection of a manual control state on the monitoring host module 200, the manual switching of the first charger set module 300 bus is performed by closing the first manual switch ZK01, and the manual switching of the second manual switch ZK02 is performed by manually switching the second charger set module 400 bus.

In the direct-current double-bus power supply system, when a first charger set module 300 and a second charger set module 400 operate normally, the first charger set module 300 is provided with a direct-current bus at the I section, the second charger set module 400 is provided with a direct-current bus at the II section, a public charger set module 700 is used as a hot standby, and the output of the public charger set module 700 is connected to the direct-current bus at the I section and the direct-current bus at the II section through a contactor. When the first charger set module 300 fails, the monitoring host module 200 provides a pull-in command to the first contactor CZ01 after comprehensive judgment by judging that the output voltage of the first charger set module 300 is out of voltage, the data acquisition module 601 provides the voltage and the current of the I-section direct current bus, and the I/O module 605 provides the switching value of the switch and the contactor, so as to realize the function that the common charger set module 700 carries the I-section bus. When the second charger set module 400 fails, the monitoring host module 200 determines that the output voltage of the second charger set module 400 is not pressurized, the data acquisition module 601 provides the voltage and the current of the direct current bus at the section II, the I/O module 605 provides the switching value of the switch and the contactor, and after comprehensive determination, a pull-in command is given to the second contactor CZ02, so that the function that the public charger set module 700 carries the bus at the section II is realized,

when the first charger set module 300 is provided with the I-section direct-current bus and the second charger set module 400 is abnormal at the same time, the intelligent direct-current automatic protection switching device judges the data volume and the acquisition volume, and the monitoring host sends a pull-in command to the first contactor CZ01 and the second contactor CZ02, so that the function that the public charger set module 700 is provided with the I, II-section direct-current bus is realized.

Claims

1. Intelligent direct current automatic protection switching device, its characterized in that includes: background control host computer module (100), monitoring host computer module (200), first machine group module (300), second machine group module (400), direct current voltage electric current collection module (500), switching value collection output module (600), public machine group module (700) that charges, wherein: the background monitoring host computer module (100) is connected with the monitoring host computer module (200), and the monitoring host computer module (200) is respectively connected with the first charger set module (300), the second charger set module (400), the direct-current voltage and current acquisition module (500), the switching value acquisition output module (600) and the public charger set module (700);

the direct voltage current collection module (500) comprises: the novel module one of direct current collection and the novel module two of direct current collection, switching value acquisition output module (600) includes: data acquisition module (601), optoelectronic isolation module (602), singlechip (603), communication module (604), I/O module (605), opto-coupler module (606), control module (607), data expansion module (608), wherein: the data acquisition module (601) is connected with the photoelectric isolation module (602), the photoelectric isolation module (602) is connected with the data expansion module (608), the data expansion module (608) is connected with the single chip microcomputer (603), the single chip microcomputer (603) is connected with the optical coupling module (606), the optical coupling module (606) is connected with the communication module (604), the communication module (604) is connected with the I/O module (605), and the I/O module (605) is connected with the control module (607);

the control module (607) comprises: the system comprises a first contactor CZ01, a second contactor CZ02, a first manual switch ZK01, a second manual switch ZK02, a first switch ZK101, a second switch ZK102, a third switch ZK103, a first breaker G01, a second breaker G02, a third breaker G03, a first alternating current power supply mutual switching module HT1, a second alternating current power supply mutual switching module HT2, a third alternating current power supply mutual switching module HT3, a first lightning arrester B1, a second lightning arrester B2 and a third lightning arrester B3, wherein: the first contactor CZ01 and the first manual switch ZK01 are connected in parallel and then connected in series with the second switch ZK102, the second contactor CZ02 is connected in parallel and then connected in series with the second manual switch ZK02, the first switch ZK101 is connected in series with the first charger set module (300), the third switch ZK103 is connected in series with the second charger set module (400), the second switch ZK102 is connected with the common charger set module (700) and the second breaker G02, the alternating current power supply mutual switching module II HT2 is sequentially connected in series, a second lightning arrester B2 is connected between the circuit breaker II G02 and the alternating current power supply mutual switching module II HT2, the first charger group module (300) is sequentially connected in series with the circuit breaker I G01 and the alternating current power supply mutual switching module I HT1, a first lightning arrester B1 is connected between the circuit breaker I G01 and the alternating current power supply mutual switching module I HT1, the second charger group module (400) is sequentially connected in series with the circuit breaker III G03 and the alternating current power supply mutual switching module III HT3, and a third lightning arrester B3 is connected between the circuit breaker III G03 and the alternating current power supply mutual switching module III HT 3.

2. The intelligent dc automatic protection switching device according to claim 1, wherein: the optoelectronic isolation module (602) comprises: the photoelectric isolation element is TLP 521-4.

3. The intelligent dc automatic protection switching device according to claim 1, wherein: the data expansion module (608) comprises: and the data expansion chip has the model of PCF 8574.

4. The intelligent dc automatic protection switching device according to claim 1, wherein: the type of the single chip microcomputer (603) is AT89C 2051.

5. The intelligent dc automatic protection switching device according to claim 1, wherein: the optocoupler module (606) includes: the optical coupler element is 6N 137.

6. The intelligent dc automatic protection switching device according to claim 1, wherein: the communication module (604) comprises: the communication chip, the communication chip model is MAX 485.