CN215679129U - Valve closing time testing arrangement based on homemade DCS system - Google Patents
Valve closing time testing arrangement based on homemade DCS system Download PDFInfo
- Publication number
- CN215679129U CN215679129U CN202121110882.9U CN202121110882U CN215679129U CN 215679129 U CN215679129 U CN 215679129U CN 202121110882 U CN202121110882 U CN 202121110882U CN 215679129 U CN215679129 U CN 215679129U
- Authority
- CN
- China
- Prior art keywords
- data
- signal
- valve
- closing time
- data acquisition
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Testing And Monitoring For Control Systems (AREA)
Abstract
The utility model discloses a valve closing time testing device based on a domestic DCS (distributed control system), which comprises a switching value data acquisition channel, an analog quantity data acquisition channel, a data acquisition part, a data processing part, a data communication part, a power supply part and a display part, wherein the switching value data acquisition channel and the analog quantity data acquisition channel are connected with the data acquisition part, the data acquisition part is connected with the data processing part, the data processing part is connected with the data communication part, the data communication part is connected with the display part, and the power supply part supplies power to the whole testing device; the utility model has the advantages that: the acquired signals have no time difference, the test result is more accurate, and the method is suitable for a domestic DCS system.
Description
Technical Field
The utility model relates to the field of automatic control, in particular to a valve closing time testing device based on a domestic DCS (distributed control system).
Background
When the unit trips, the main steam valve and the regulating valve are closed simultaneously, and steam inlet is cut off, so that the safety of the unit is guaranteed. As important equipment for guaranteeing safe and stable operation of the unit, closing time of a main valve and a regulating valve has important significance, and each power plant is required to carry out a valve closing time test regularly.
At present, the process of DCS localization is increasingly promoted, but the technology of the valve closing time test which is crucial to the quality of the adjustment and control of the steam turbine is still limited by foreign technologies. The valve closing time testing device of the Siemens T3000 electro-hydraulic control system obtains the total closing time of the valve by calculating the LVDT signals. In such a test method, the LVDT signal is subjected to a time difference through transmission and processing by a controller, so that the test result is inaccurate.
CN 204729139U's of grant bulletin number utility model patent "steam turbine main steam door closing time measuring device" discloses a steam turbine main steam door closing time measuring device, and this method is through using travel switch and collection system to gather the complete signal of closing of unit tripping operation signal and main steam door, calculates steam turbine main steam door closing time to eliminate the error that LVDT analog signal brought through communication module and controller operation, realize the automatic measurement of main steam door closing time when the online shut-off of unit or trip, improve main steam door closing time measuring accuracy. Although the method avoids the time error caused by the fact that the LVDT analog quantity signals pass through the communication module and the processor, the device is only suitable for the valve provided with the travel switch, the device needs to modify the LVDT valve in practical application and additionally provide the travel switch and the cable, and the device is difficult to popularize. And the device can only measure the total closing time of the main throttle valve and cannot measure the delay time.
In summary, at present, there is no valve closing time testing device suitable for the domestic DCS control system.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that no valve closing time testing device suitable for a domestic DCS (distributed control system) is available at present.
The utility model solves the technical problems through the following technical means: the utility model provides a valve closing time testing arrangement based on domestic DCS system, includes switching value data acquisition passageway, analog quantity data acquisition passageway, data acquisition part, data processing part, data communication part, power supply part and display part, switching value data acquisition passageway, analog quantity data acquisition passageway all are connected with the data acquisition part, and the data acquisition part is connected with the data processing part, and the data processing part meets with the data communication part, and the data communication part is connected with the display part, the power supply part supplies power for whole testing arrangement.
The switching value data acquisition channel and the analog value data acquisition channel respectively receive the switching value signals and the analog value signals of the DCS and transmit the switching value signals and the analog value signals to the data acquisition part to obtain the closing time of the valve through the data processing part, the acquired signals have no time difference, the test result is accurate, and the method is suitable for the domestic DCS.
Furthermore, the switching value data acquisition channels are provided with a plurality of switching value data acquisition channels which are respectively connected with a front opening button of the centralized control room panel, a full-opening feedback signal of the main valve, a full-closing feedback signal of the main valve, and a full-opening feedback signal and a full-closing feedback signal of the valve provided with the limit switch.
Furthermore, a plurality of analog quantity data acquisition channels are provided and respectively receive a voltage signal of a front brake-opening button of the centralized control room panel and an analog quantity opening degree feedback signal of each valve.
Furthermore, the data acquisition part comprises a first DI signal acquisition module, a second DI signal acquisition module, an A/D converter and an AI signal acquisition module, the data processing part comprises a data centralized processor, the switching data acquisition channels are connected with the digital signal acquisition ports of the first DI signal acquisition module in a one-to-one correspondence manner, the analog quantity data acquisition channels are connected with the analog signal acquisition ports of the A/D converter and the data acquisition ports of the AI signal acquisition module in a one-to-one correspondence manner, and the first DI signal acquisition module, the second DI signal acquisition module and the AI signal acquisition module transmit data to the data centralized processor through RS485 communication cables.
Furthermore, the first DI signal acquisition module and the second DI signal acquisition module are both KM234A, the AI signal acquisition module is KM231A, and the a/D converter is AAD08Q 2500.
Furthermore, the data processing part further comprises a clock unit, and the clock unit is respectively connected with the first DI signal acquisition module, the second DI signal acquisition module, the A/D converter and the AI signal acquisition module and is used for synchronizing clocks among the modules.
Still further, the model of the clock unit is FM 197.
Furthermore, the data communication part comprises a switch, a TCP/IP local area network and an HDMI interface, and the switch is connected with the communication interface of the data centralized processor; the switch is connected with the TCP/IP local area network and is used for data communication between the data centralized processor and the upper computer; the switch is connected with the HDMI interface and used for data communication between the data concentration processor and the touch screen display.
Still further, the power supply part comprises a plurality of redundant power supply units, and the plurality of power supply units independently supply power to each module. The power supply part is not simply provided with multiple paths of power supplies, but is designed into a redundant power supply unit. The redundant power supply unit, i.e. one of all power supply units, is a main power supply, and is also a standby auxiliary power supply. The auxiliary power supply is enabled only when the main power supply is powered off. Two paths of power supplies can be switched mutually, and the purpose is to avoid the system power loss caused by faults.
Still further, the display part comprises an upper computer, and the upper computer is connected with the switch through a TCP/IP local area network.
Still further, the display part also comprises a touch screen display, and the touch screen display is connected with the switch through an HDMI interface.
The utility model has the advantages that: the switching value data acquisition channel and the analog value data acquisition channel respectively receive the switching value signals and the analog value signals of the DCS and transmit the switching value signals and the analog value signals to the data acquisition part to obtain the closing time of the valve through the data processing part, the acquired signals have no time difference, the test result is accurate, and the method is suitable for the domestic DCS.
Drawings
Fig. 1 is a schematic structural diagram of a valve closing time testing apparatus based on a domestic DCS system according to an embodiment of the present invention;
fig. 2 is a flowchart of a conventional test performed in a shutdown state of a valve closing time testing apparatus based on a domestic DCS system according to an embodiment of the present invention;
fig. 3 is a flow chart of a standby test of a valve closing time testing apparatus based on a domestic DCS system according to an embodiment of the present invention;
fig. 4 is a schematic diagram of main valve data calculation and processing of a valve closing time testing device based on a domestic DCS system according to an embodiment of the present invention;
fig. 5 is a schematic diagram of calculation processing of adjustment valve data of a valve closing time testing apparatus based on a domestic DCS system according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, a valve closing time testing device based on a domestic DCS system includes a switching value data acquisition channel 1, an analog value data acquisition channel 2, a data acquisition part 3, a data processing part 4, a data communication part 5, a power supply part 6 and a display part 7, wherein the switching value data acquisition channel 1 and the analog value data acquisition channel 2 are both connected with the data acquisition part 3, the data acquisition part 3 is connected with the data processing part 4, the data processing part 4 is connected with the data communication part 5, the data communication part 5 is connected with the display part 7, and the power supply part 6 supplies power to the whole testing device.
The switching value data acquisition channels 1 are provided with a plurality of switching value data acquisition channels which are respectively connected with a front opening button of the centralized control room panel, a full-opening feedback signal of the main valve, a full-closing feedback signal of the main valve, and a full-opening feedback signal and a full-closing feedback signal of the valve provided with the limit switch.
The analog quantity data acquisition channels 2 are provided with a plurality of channels and respectively receive voltage signals of a front brake-opening button of the centralized control room and analog quantity opening degree feedback signals of all valves.
The data acquisition part 3 includes a first DI signal acquisition module 302, a second DI signal acquisition module 303, an a/D converter 301, and an AI signal acquisition module 304. The data processing section 4 includes a data concentration processor 401. The switching value data acquisition channels 1 are connected to the digital signal acquisition ports of the first DI signal acquisition module 302 in a one-to-one correspondence manner, and the analog value data acquisition channels 2 are connected to the analog signal acquisition ports of the a/D converter 301 and the data acquisition ports of the AI signal acquisition module 304 in a one-to-one correspondence manner. The first DI signal acquisition module 302, the second DI signal acquisition module 302 and the AI signal acquisition module 304 transmit data to the data centralized processor 401 through the RS485 communication cable.
The first DI signal acquisition module 302 and the second DI signal acquisition module 303 are both KM234A, the AI signal acquisition module 304 is KM231A, and the a/D converter 301 is AAD08Q 2500.
The data processing part 4 comprises a data centralized processor 401, the data centralized processor 401 is used for preprocessing data and calculating data, and the calculation result is sent to an upper computer 701 and a touch screen display 702 through a data communication part 5.
The data processing part 4 further comprises a clock unit 402, wherein the model of the clock unit 402 is FM 197; the clock unit 402 is connected to the second DI signal acquisition module 303, the a/D converter 301, and the AI signal acquisition module 304, respectively.
The data communication part 5 comprises a switch 501, a TCP/IP local area network 502 and an HDMI interface 503, and the display part 7 comprises an upper computer 701 and a touch screen display 702; the switch 501 connects the data centralized processor 401 with the upper computer 701 through the TCP/IP lan 502, and the switch 501 is used for data communication between the data centralized processor 401 and the upper computer 701; the switch 501 connects the data concentration processor 401 with the touch screen display 702 through the HDMI interface 503, and is also used for data communication between the data concentration processor 401 and the touch screen display 702.
The power supply part 6 is a redundant power supply unit which is two independent redundant power supply sources, and each power supply unit can independently supply power to each module. The power supply portion 6 in this embodiment includes a first power supply unit 601 and a second power supply unit 602, and the first power supply unit 601 supplies power to each module during normal operation, and switches to the second power supply unit 602 to supply power when the first power supply unit 601 fails, and switches back to the first power supply unit 601 to supply power when the first power supply unit 601 recovers to be normal.
The method comprises the following steps:
when the device is used, a tripping instruction and an opening degree feedback signal of a valve to be tested are connected into the testing device. If the signal is the switching value, the signal is connected with the switching value data acquisition channel 1, if the signal is the analog value, the signal is connected with the analog value data acquisition channel 2, and the first switching value data acquisition channel 1 and the analog value data acquisition channel 2 are used for connecting a tripping command. Analog quantity signals acquired by the analog quantity data acquisition channel 2 pass through two devices, wherein one of the analog quantity signals is directly sent to the AI signal acquisition module 304 and is directly sent to the processor 401 for signal processing, and the other one of the analog quantity signals is directly converted into switching value signals through the A/D converter 301 and then is sent to the processor 401. The data processing part 4 calculates the valve closing delay time, the valve closing time and the total valve closing time according to the measured data, and sends the data to the touch screen display 702 of the display part 7 through the data communication part 5 for display, and can also transmit the data to the NT6000 system of the upper computer 701 (an engineer station or an operator station) for display, recording and processing. Therefore, the on-line test of the closing time of the valve is realized.
Fig. 2 and 3 are two usage scenarios of the device. The following describes the calculation processes of the valve closing delay time, the valve closing time and the total valve closing time in two usage scenarios.
Fig. 2 is a flowchart of a conventional test in a shutdown state. Suppose there are N main ports with limit switches installed and M regulating ports with LVDTs installed. The valve closing time test should be performed during the unit down time for maintenance as required by regulations. The test procedure when the device was used in the experiment is shown in figure 2.
The method comprises the following steps: and opening all the valves to be tested to a full-open position, and after the test conditions are met, pressing a front opening button by an operator to send an opening instruction and closing all the valves to be tested.
Step two: the test device receives a trip instruction, and the time for detecting the trip instruction is x0。
Step three: the device receives an opening degree feedback signal of the valve.
Step four: and calculating the valve closing delay time from the trip instruction to the valve to start to close, the valve self-closing time and the total valve closing time according to the acquired signals.
As shown in FIG. 4, taking the nth main throttle as an example, N is less than or equal to N. The main valve is fully opened with a signal of yn1，yn11 indicates that the main throttle is in a fully opened state, and y is after the brake is openedn1Change from 1 to 0, record time xn1I.e. the disappearance time of the main valve full opening signal is xn1. Similarly, the main valve is fully closedn2Recording the time of arrival of the full off signal as xn2. The closing delay time t of the main valven0The self-closing time t of the main valven1Total closing time t of the valvenThe calculation formula of (c) is as follows.
tn0＝xn1-x0
tn1＝xn2-xn1
tn＝tn0+tn1＝xn2-x0
As shown in FIG. 5, taking the mth adjustment port as an example, M is less than or equal to M. Gate LVDT signal y collected by analog data collecting channel 2mThe signal passes through two devices. One path is converted into a gate-adjusting full-open signal x by an A/D converter 301m1And gate full-off signal xm2. The switching logic is as follows, assuming full closing with a valve opening of 3%, where y is ym1The valve opening is 97 percent and is fully opened at the momenty＝ym2. When y ism≤ym1，xm11, otherwise xm10. When y ism≥ym2，xm21, otherwise xm20. The closing delay time t of the regulating valvem0Time t of closing of valve itselfm1Total closing time t of the valvemThe calculation formula is as follows.
tm0＝xm1-x0
tm0＝xm2-xm1
tm＝tm0+tm1＝xm2-x0
Fig. 3 is a flow chart of the standby test. When the unit is in a normal operation state, the testing device is in a standby state, data are uninterruptedly tested in the standby state, and when the unit trips due to the abnormal condition, the device can measure the closing time of the valve after the unit trips so as to be analyzed by technicians. Suppose there are N main ports with limit switches installed and M regulating ports with LVDTs installed. The test procedure when the device was used in the experiment is shown in figure 3.
The method comprises the following steps: the test device receives a trip instruction, and the time for detecting the trip instruction is x0。
Step two: the device receives an opening degree feedback signal of the valve.
Step three: and calculating the valve closing delay time from the trip instruction to the valve to start to close, the valve self-closing time and the total valve closing time according to the acquired signals.
As shown in FIG. 4, taking the nth main throttle as an example, N is less than or equal to N. The main valve is fully opened with a signal of yn1，yn11 indicates that the main throttle is in a fully opened state, and y is after the brake is openedn1Change from 1 to 0, record time xn1I.e. the disappearance time of the main valve full opening signal is xn1. Similarly, the main valve is fully closedn2Recording the time of arrival of the full off signal as xn2. The closing delay time t of the main valven0The self-closing time t of the main valven1Valve assemblyOff time tnThe calculation formula of (c) is as follows.
tn0＝xn1-x0
tn1＝xn2-xn1
tn＝tn0+tn1＝xn2-x0
As shown in FIG. 5, taking the mth adjustment port as an example, M is less than or equal to M. Gate LVDT signal y collected by analog data collecting channel 2mThe signal passes through two devices. One path is converted into a gate-adjusting full-open signal x by an A/D converter 301m1And gate full-off signal xm2. The switching logic is as follows, assuming full closing with a valve opening of 3%, where y is ym1The valve opening is 97% of full opening, and y is equal to ym2. When y ism≤ym1，xm11, otherwise xm10. When y ism≥ym2，xm21, otherwise xm20. The closing delay time t of the regulating valvem0Time t of closing of valve itselfm1Total closing time t of the valvemThe calculation formula is as follows.
tm0＝xm1-x0
tm1＝xm2-xm1
tm＝tm0+tm1＝xm2-x0。
It should be noted that the present invention only protects the hardware circuit architecture, and does not protect the above test process, and the calculation formula related to the data processing portion 4 in the above test process is not within the protection scope of the present invention.
Through the technical scheme, the switching value data acquisition channel 1 and the analog value data acquisition channel 2 respectively receive the switching value signals and the analog value signals of the DCS and transmit the switching value signals and the analog value signals to the data acquisition part 3 to obtain the closing time of the valve through the data processing part 4, the acquired signals have no time difference, the test result is accurate, and the method is suitable for the domestic DCS.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a valve closing time testing arrangement based on localized DCS system, its characterized in that, includes switching value data acquisition passageway, analog quantity data acquisition passageway, data acquisition part, data processing part, data communication part, power supply part and display segment, switching value data acquisition passageway, analog quantity data acquisition passageway all are connected with the data acquisition part, and the data acquisition part is connected with the data processing part, and the data processing part meets with the data communication part, and the data communication part is connected with the display segment, the power supply part is for whole testing arrangement power supply.
2. The device for testing the closing time of the valve based on the domestic DCS system of claim 1, wherein the switching value data acquisition channels are provided with a plurality of channels, and are respectively connected with a front opening button of the centralized control room panel, a full opening feedback signal of the main throttle valve, a full closing feedback signal of the main throttle valve, and a full opening feedback signal and a full closing feedback signal of the valve provided with the limit switch.
3. The device for testing the closing time of the valve based on the domestic DCS of claim 1, wherein the analog data acquisition channels are provided with a plurality of channels for receiving a voltage signal of a front opening button of the centralized control room panel and an analog opening degree feedback signal of each valve respectively.
4. The valve closing time testing device of claim 1, wherein the data collecting part comprises a first DI signal collecting module, a second DI signal collecting module, an a/D converter and an AI signal collecting module, the data processing part comprises a data centralized processor, the switching data collecting channels are connected with the digital signal collecting ports of the first DI signal collecting module in a one-to-one correspondence manner, the analog data collecting channels are connected with the analog signal collecting ports of the a/D converter and the data collecting ports of the AI signal collecting module in a one-to-one correspondence manner, and the first DI signal collecting module, the second DI signal collecting module and the AI signal collecting module transmit data to the data centralized processor through RS485 communication cables.
5. The device of claim 4, wherein the first DI signal acquisition module and the second DI signal acquisition module are both KM234A, the AI signal acquisition module is KM231A, and the A/D converter is AAD08Q 2500.
6. The valve closing time testing device based on the localized DCS system of claim 4, wherein the data processing part further comprises a clock unit, and the clock unit is respectively connected with the second DI signal acquisition module, the A/D converter and the AI signal acquisition module.
7. The device for testing the closing time of the valve based on the domestic DCS system of claim 6, wherein the type of the clock unit is FM 197.
8. The valve closing time testing device based on the domestic DCS system of claim 1, wherein the data communication part comprises a switch, a TCP/IP local area network and an HDMI interface, the switch is connected with the communication interface of the data centralized processor; the switch is connected with a TCP/IP local area network; the switch is also connected with the HDMI interface.
9. The device for testing the closing time of the valve based on the domestic DCS system of claim 8, wherein the display part comprises an upper computer, and the upper computer is connected with the switch through a TCP/IP local area network.
10. The device for testing valve closing time of a domestic DCS system of claim 9, wherein said display unit further comprises a touch screen display, said touch screen display being connected to the switch via an HDMI interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121110882.9U CN215679129U (en) | 2021-05-21 | 2021-05-21 | Valve closing time testing arrangement based on homemade DCS system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121110882.9U CN215679129U (en) | 2021-05-21 | 2021-05-21 | Valve closing time testing arrangement based on homemade DCS system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215679129U true CN215679129U (en) | 2022-01-28 |
Family
ID=79972604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121110882.9U Active CN215679129U (en) | 2021-05-21 | 2021-05-21 | Valve closing time testing arrangement based on homemade DCS system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215679129U (en) |
-
2021
- 2021-05-21 CN CN202121110882.9U patent/CN215679129U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111337781B (en) | Sampling abnormity control decoupling direct current protection field test system and method | |
| CN109582004B (en) | Intelligent detection platform | |
| CN101465563A (en) | Integrated automation integration protection method and system | |
| CN104967220A (en) | Transformer substation monitoring system | |
| CN104076807A (en) | Method of debugging automation system of intelligent substation | |
| CN215679129U (en) | Valve closing time testing arrangement based on homemade DCS system | |
| Knezev et al. | Automated circuit breaker monitoring | |
| Deliyannides et al. | Design criteria for an integrated microprocessor-based substation protection and control system | |
| CN112034411B (en) | Intelligent isolation switch equipment and electric energy meter running state analysis method | |
| Zhang et al. | Research and Application of Collaborative Testing Technology for Safety and Stability Control System Based on Distributed Simulation | |
| CN106844127A (en) | A kind of highly reliable modular testing emulation platform | |
| CN115641973B (en) | Verification system and method for reactor core neutron flux measurement system | |
| CN114114893A (en) | I/O high-speed processing method for DEH system of ultra-supercritical unit | |
| CN111580504A (en) | Simulation test platform of submarine cable oil pump station control system | |
| CN113030607A (en) | Automatic test system of distribution automation terminal | |
| CN108536038B (en) | Automatic control simulation system for centrifugal cascade process | |
| KR20010076546A (en) | Instrumentation and Control System in Nuclear Power Plant | |
| CN117169640B (en) | Multiple ratio differential verification method and device under multi-distributed new energy access feeder line | |
| LU503552B1 (en) | System for simulation of operating conditions of high voltage primary equipment in a low voltage environment | |
| CN109709477A (en) | The test macro of protective relaying device under a kind of mixed connection mode | |
| Kayano et al. | Distribution substation transformer and circuit breaker diagnoses with the assistance of realtime monitoring | |
| CN111600773B (en) | HDLC protocol simulation-based integrated test device and method for stability system | |
| Teoh et al. | Process bus busbar protection-a stepping stone towards digital substation | |
| CN105929269A (en) | Nuclear power plant electric head clamp hybrid simulation testing system and method | |
| CN117013484A (en) | Online checking method for relay protection of power grid system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |