CN205407406U

CN205407406U - Two switching of power control system of CEMS

Info

Publication number: CN205407406U
Application number: CN201620267184.2U
Authority: CN
Inventors: 陈天琪; 徐鸿飞
Original assignee: Datang Guizhou Faer Power Generation Co Ltd
Current assignee: Datang Guizhou Faer Power Generation Co Ltd
Priority date: 2016-03-31
Filing date: 2016-03-31
Publication date: 2016-07-27
Anticipated expiration: 2026-03-31

Abstract

The utility model provides a two switching of power control system of CEMS, does CEMS power supply thread loop through ac contactor KM1's normal open auxiliary contact KM1 1 be connected normally closed auxiliary contact KM2 with switch K1 with security personnel's section power 2 establish ties later to normal open auxiliary contact KM1 with ac contactor KM1 1 and between the switch K1 with the L1 and N1 series connection of security personnel section power, the utility model discloses an adopt UPS power and security personnel's section power interlocking power supply, ensure the two switching of power of CEMS, solved single power supply important equipment problem because of losing the electricity and restarting when losing the electricity, simultaneously through increasing the high power load delay control return circuit, avoid in the return circuit power of important equipment less and appear robbing the electric current and leading to the problem that important equipment restarted switching in the twinkling of an eye other high -power additional equipment, thereby CEMS double - circuit switching of power effect has been reached.

Description

A kind of dual power supply handover control system of CEMS

Technical field

The utility model belongs to thermal power generating technology field, is specifically related to double electricity of a kind of CEMS Source handover control system.

Background technology

Fume continuous monitoring system be called for short CEMS, be in Coal,steam plant with FGD system not The part that can or lack, is the important leverage of flue gas desulphurization system works fine.I am company CEMS The single channel security personnel's section 220V power supply used before the Power supply alteration of cell.Often as unit mediate or The switching of the person's section of security personnel bus power supply causes CEMS system host computer and Siemens's U23 gas analysis Instrument moment dead electricity and restart, Siemens's U23 instrument is restarted every time all can about 30 minutes pre- Heat the time, after host computer dead electricity improper restart may result in PAS-DAS software document damage, Cause configuration file to be lost, thus can cause uploading environment protection digital and go out active, to environment monitoring Bring puzzlement greatly.

And during transformation double loop power supply, a road uses ups power, a road to use security personnel's section Power supply, in dual power supply switching tests, when often occurring power supply to switch, visual plant is attached and sets For robbing the problem that electric current causes equipment to be restarted, the heating tape merit of especially CEMS pretreatment system Rate (accounting for the 80% of whole load) is spent conference moment and is worn voltage down, causes Siemens's U23 instrument Restart, thus lose the anticipated effect reached of dual power supply switching.It is thus desirable to solve double electricity simultaneously The problem that source powers and brought after dual power supply.

Utility model content

For solving above-mentioned technical problem, the utility model provides the dual power supply of a kind of CEMS and cuts Changing control system, the dual power supply handover control system of this CEMS is by using ups power and security personnel Section power interlock is powered, and what when solving single power supply dead electricity, visual plant was restarted because of dead electricity asks Topic；Simultaneously by increasing high power load delays time to control loop, solve when dual power supply switches The problem that electric current causes visual plant to be restarted robbed by the powerful device occurred.

The utility model is achieved by the following technical programs.

The dual power supply handover control system of a kind of CEMS that the utility model provides, including security personnel Section power supply, ups power, CEMS power main line, A.C. contactor KM1 and auxiliary contact thereof, A.C. contactor KM2 and auxiliary contact thereof；Described CEMS main line of powering passes sequentially through exchange and connects The normally opened auxiliary contact KM1-1 of tentaculum KM1 and switch K1 is connected with security personnel's section power supply, normally closed auxiliary In normally opened auxiliary contact KM1-1 and switch after helping contact KM2-2 to connect with A.C. contactor KM1 Between K1, L1 and N1 with security personnel's section power supply connects；

Described CEMS main line of powering also passes sequentially through the normally opened auxiliary contact of A.C. contactor KM2 KM2-1 and switch K2 is connected with ups power, normally closed auxiliary contact KM1-2 and A.C. contactor After KM2 series connection between normally opened auxiliary contact KM2-1 and switch K2 with L2 and N2 of ups power Series connection.

Described CEMS powers and is additionally provided with high power load delay regulation circuit, big merit on main line Rate load delay controls loop and includes time-delay relay TC and replicate contact, A.C. contactor KM3 and auxiliary contact thereof, time-delay relay TC concatenates after connecting with normally closed auxiliary contact KM3-2 In CEMS power main line live wire and zero line between；

The normally opened auxiliary contact TC-1 of time-delay relay TC goes here and there after connecting with A.C. contactor KM3 Be connected to CEMS power main line live wire and zero line between, and the two ends of normally opened auxiliary contact TC-1 are also It is parallel with normally opened auxiliary contact KM3-3；

High power load is serially connected with CEMS by two pairs of contacts of normally opened auxiliary contact KM3-1 and supplies Between live wire and the zero line of electricity main line.

Described CEMS power main line live wire and zero line between directly concatenate low-power load.

Described high power load is heating tape heater.

Described low-power load is host computer and Siemens's U23 gas analyzer of CEMS system.

The beneficial effects of the utility model are: by using ups power and security personnel's section power supply mutual Lock power supply, it is ensured that CEMS dual power supply switch, when solving single power supply dead electricity visual plant because of Dead electricity and the problem restarted；Simultaneously by increasing high power load delays time to control loop, it is to avoid return In road the power of visual plant less and occur in switching other high-power auxiliary devices of moment rob Electric current and cause the problem that visual plant restarts；The utility model ensure that the double electricity of CEMS system Source switching can effectively be carried out, and reduces the auxiliary device interference to capital equipment as far as possible； Guarantee that U23 gas analyzer will not moment dead electricity be restarted, thus ensure environment protection digital continuously the most not Interrupt monitoring, gather, reliability, stability and the accuracy of environment protection digital monitoring is provided Big guarantee, thus reached CEMS double loop power supply switching effect.

Accompanying drawing explanation

Fig. 1 is control principle drawing of the present utility model.

Detailed description of the invention

The technical solution of the utility model is described further below, but claimed scope is not It is confined to described.

The dual power supply handover control system of a kind of CEMS as shown in Figure 1, including security personnel's section electricity Source, ups power, CEMS power main line, A.C. contactor KM1 and auxiliary contact, exchange Contactor KM2 and auxiliary contact thereof；Described CEMS main line of powering passes sequentially through A.C. contactor The normally opened auxiliary contact KM1-1 of KM1 and switch K1 is connected with security personnel's section power supply, and normally closed auxiliary is touched Point KM2-2 connect with A.C. contactor KM1 after in normally opened auxiliary contact KM1-1 and switch K1 it Between with security personnel section power supply L1 and N1 connect；Described CEMS main line of powering also passes sequentially through exchange The normally opened auxiliary contact KM2-1 of contactor KM2 and switch K2 is connected with ups power, normally closed auxiliary In normally opened auxiliary contact KM2-1 and switch after helping contact KM1-2 to connect with A.C. contactor KM2 Between K2, L2 and N2 with ups power connects.

Described CEMS powers and is additionally provided with high power load delay regulation circuit, big merit on main line Rate load delay controls loop and includes time-delay relay TC and replicate contact, A.C. contactor KM3 and auxiliary contact thereof, time-delay relay TC concatenates after connecting with normally closed auxiliary contact KM3-2 In CEMS power main line live wire and zero line between.

The normally opened auxiliary contact TC-1 of time-delay relay TC goes here and there after connecting with A.C. contactor KM3 Be connected to CEMS power main line live wire and zero line between, and the two ends of normally opened auxiliary contact TC-1 are also It is parallel with normally opened auxiliary contact KM3-3；High power load is by normally opened auxiliary contact KM3-1's The two pairs of contacts be serially connected with CEMS power main line live wire and zero line between.

Described high power load is heating tape heater.

The utility model utilizes the normally-closed contact KM1-2 of the A.C. contactor KM1 of security personnel's section power supply And the coil KM2 of the A.C. contactor of ups power forms one between L2, N2 of ups power Individual control loop controls ups power；Utilize the normally-closed contact of the ac contactor of ups power The coil KM1 of the A.C. contactor of KM2-2 and security personnel's section power supply is at L1, N1 of security personnel's section power supply Between formed one control loop control ensure public security section power supply.

Increase exchanges contactor KM3, increases by a pair A.C. contactor normal before heating tape heater Open contact KM3-1 to control the Guan Bi of heating tape heater；Utilize the time delay of time-delay relay TC The coil of Guan Bi contact TC-1 and the A.C. contactor KM3 of heating tape forms one and controls loop Control the first Guan Bi of heating tape contactor；Utilize the A.C. contactor KM3's before heating tape Normally opened contact KM3-3 forms a Self-closing lock loop with its coil, it is ensured that persistently closing of heating tape Close；Utilize normally-closed contact KM3-2 and the time-delay relay of the A.C. contactor KM3 before heating tape The coil of TC forms a control loop and controls delayed relay.

In actual use, CEMS is currently in use ups power to the utility model, UPS suddenly Power loss, the normally-closed contact KM2-2 of the A.C. contactor KM2 of ups power will close automatically Close, so that the coil of the A.C. contactor KM1 of security personnel's section power supply is charged, thus the section of security personnel A.C. contactor normally opened contact KM1-1 closes, and security personnel's section is powered.Ups power dead electricity moment accompanies The normally opened auxiliary contact KM3-1 of the A.C. contactor KM3 before the torrid zone disconnects, when security personnel's section energising After, Siemens's U23 gas analyzer is just the most charged, and time-delay relay TC starts timing, when Reaching time-delay relay timing closing contact TC-1 Guan Bi after the setting time, before heating tape, exchange connects The coil of tentaculum KM3 is charged, the normally opened auxiliary contact KM3-1 Guan Bi of A.C. contactor KM3, A.C. contactor normally-closed contact KM3-2 disconnects, the coil losing electricity of time-delay relay TC, stops work Making, the normally opened contact KM3-3 Guan Bi of A.C. contactor KM3, before heating tape, A.C. contactor is certainly Locked loop is energized, and heating tape heater starts normally to work；In like manner after security personnel's section dead electricity, UPS Power supply also can be powered moment.

Use CEMS system normal operation after the technical program, do not occur accompanying when dual power supply switches The torrid zone excessive situation wearing Siemens's U23 gas analyzer down of power, KM1-3, KM2-3 two is right Contact is also used as monitoring stations to monitor CEMS power supply, has ensured what environment protection digital was monitored Stability, drastically increases the stability that equipment runs.

The utility model ensure that the switching of CEMS system dual power supply can effectively be carried out, and to the greatest extent may be used The minimizing auxiliary device interference to capital equipment of energy；Guarantee that U23 gas analyzer will not moment Dead electricity is restarted, thus ensures that the continuous of environment protection digital does not interrupt monitoring, collection, to environment protection digital The reliability of monitoring, stability and accuracy provide maximum guarantee, thus have reached CEMS Double loop power supply switching effect.

Claims

1. a dual power supply handover control system of CEMS, including security personnel's section power supply, UPS electricity Source, CEMS power main line, A.C. contactor KM1 and auxiliary contact thereof, A.C. contactor KM2 And auxiliary contact, it is characterised in that: described CEMS main line of powering passes sequentially through ac contactor The normally opened auxiliary contact KM1-1 of device KM1 and switch K1 is connected with security personnel's section power supply, normally closed auxiliary Contact KM2-2 connect with A.C. contactor KM1 after in normally opened auxiliary contact KM1-1 and switch K1 Between with security personnel section power supply L1 and N1 connect；

2. the dual power supply handover control system of CEMS as claimed in claim 1, its feature exists It is additionally provided with high power load delay regulation circuit, big merit on: described CEMS powers main line Rate load delay controls loop and includes time-delay relay TC and replicate contact, A.C. contactor KM3 and auxiliary contact thereof, time-delay relay TC concatenates after connecting with normally closed auxiliary contact KM3-2 In CEMS power main line live wire and zero line between；

3. the dual power supply handover control system of CEMS as claimed in claim 1 or 2, its feature Be: described CEMS power main line live wire and zero line between directly concatenate low-power load.

4. the dual power supply handover control system of CEMS as claimed in claim 2, its feature exists In: described high power load is heating tape heater.

5. the dual power supply handover control system of CEMS as claimed in claim 3, its feature exists In: described low-power load is host computer and Siemens's U23 gas analyzer of CEMS system.