CN113268041B - Rectifying system starting control method and system based on DCS system - Google Patents
Rectifying system starting control method and system based on DCS system Download PDFInfo
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- CN113268041B CN113268041B CN202110479772.8A CN202110479772A CN113268041B CN 113268041 B CN113268041 B CN 113268041B CN 202110479772 A CN202110479772 A CN 202110479772A CN 113268041 B CN113268041 B CN 113268041B
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- 238000000034 method Methods 0.000 title claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000001514 detection method Methods 0.000 claims description 13
- 238000000746 purification Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000013024 troubleshooting Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
- G05B19/41845—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by system universality, reconfigurability, modularity
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/33—Director till display
- G05B2219/33273—DCS distributed, decentralised controlsystem, multiprocessor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Quality & Reliability (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Rectifiers (AREA)
Abstract
The invention belongs to the technical field of rectification system control, and provides a rectification system starting control method based on a DCS system, which comprises the following steps: s1, informing an electric operator of opening a high-voltage switch through a DCS system output signal; s2, opening the interlocking of the rectification system through the DCS system, and resetting the parking signal; s3, detecting whether the rectification system meets a driving standard or not through a PLC (programmable logic controller) of the rectification system; s4, when the rectifying system meets the driving standard, sending a driving signal to the rectifying system through the DCS system, and then receiving a rectifying system operation signal sent by the rectifying system; s5, parameters of the rectifying system are adjusted through the PLC controller, so that the rectifying system can normally operate. The invention also provides a rectifying system starting control system based on the DCS system, which has the advantages that the one-key starting of the rectifying system is realized, the operation and working conditions of the on-site water pump, the direct-current knife and the like can be automatically judged, and the working efficiency of personnel is improved.
Description
Technical Field
The invention relates to the technical field of rectification system control, in particular to a rectification system starting control method and system based on a DCS (distributed control system).
Background
The rectification system comprises an electrolytic rectification system, and the electrolytic rectification system is mainly used for producing chemical products. In the production process of chemicals, the electrolytic rectifying system needs to control the electrolytic process through the current magnitude, so that the production quality of the chemicals is ensured.
At present, the rectification system is manually started and stopped, manual operation is needed on the manual site, and judgment conditions for the starting and stopping are complex, so that error in judgment of the starting and stopping conditions often occurs in the manual operation process, and the production efficiency of the rectification system and the whole production line is low and faults occur easily.
Disclosure of Invention
The invention aims to provide a rectifying system starting control method based on a DCS system, which is used for solving the problems of inaccurate starting control and low starting efficiency of the rectifying system.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a rectifying system starting control method based on a DCS system comprises the following steps:
s1, informing an electric operator of opening a high-voltage switch through a DCS system output signal;
s2, opening the interlocking of the rectification system through the DCS system, and resetting the parking signal;
s3, detecting whether the rectification system meets a driving standard or not through a PLC (programmable logic controller) of the rectification system;
s4, when the rectifying system meets the driving standard, sending a driving signal to the rectifying system through the DCS system, and then receiving a rectifying system operation signal sent by the rectifying system;
s5, parameters of the rectifying system are adjusted through the PLC controller, so that the rectifying system can normally operate.
Further, the step S3 specifically includes:
s31, sending a start button signal to a PLC (programmable logic controller) of the rectification system through the DCS;
s32, after receiving a start button signal, the PLC detects whether the rectification system meets a start standard according to preset process conditions;
and S33, when the rectifying system meets the driving standard, the PLC feeds back the detecting result of the rectifying system to the DCS.
Further, the step S5 specifically includes:
s51, after receiving a rectifying operation signal, the DCS system automatically inputs an interlock;
s52, setting a given current rate and a given current value of the rectifying system through the DCS system, and secondarily confirming the given current value, so that the current of the rectifying system automatically rises and falls according to the given current value.
Further, the step S52 of automatically raising and lowering the current of the rectifying system according to the given current value specifically includes:
s521, setting a given current rate and a given current value of the rectification system through the DCS system, and secondarily confirming;
s522, sending given current received by the DCS system and a given current rate to a rectification system, and judging the deviation between the current actual current and the given current value by a PLC (programmable logic controller);
s523, automatically lifting the current according to the current set rate through the PLC.
The invention also aims to provide a rectifying system starting control system based on the DCS system, which comprises the following components:
the output notification module is used for notifying an electric operator to open the high-voltage switch through a DCS system output signal;
the interlocking release module is used for opening the interlocking of the rectification system through the DCS system and resetting the parking signal;
the starting standard detection module is used for detecting whether the rectification system meets the starting standard or not through a PLC (programmable logic controller) of the rectification system;
the operation module is used for sending a driving signal to the rectification system through the DCS system when the rectification system meets the driving standard, and then receiving a rectification system operation signal sent by the rectification system;
and the adjusting module is used for adjusting parameters of the rectifying system through the PLC controller so that the rectifying system can normally operate.
Further, the driving standard judging module includes:
the start button signal output unit is used for sending a start button signal to the PLC of the rectification system through the DCS;
the detection unit is used for detecting whether the rectification system meets the starting standard according to preset process conditions after the PLC receives the starting button signal;
and the detection feedback unit is used for feeding back the detection result of the rectification system to the DCS by the PLC when the rectification system meets the driving standard.
Further, the adjusting module specifically includes:
the interlocking input unit is used for automatically inputting interlocking into the DCS system after receiving the rectifying operation signal;
and the current lifting unit is used for setting a given current rate and a given current value of the rectification system through the DCS system and secondarily confirming the given current value, so that the current of the rectification system automatically lifts and lowers the current according to the given current value.
Further, the current setting unit includes:
the current setting subunit is used for setting a given current rate and a given current value of the rectification system through the DCS system and secondarily confirming the given current rate and the given current value;
the current judging subunit is used for sending the given current received by the DCS system to the rectifying system at a given current rate, and the PLC controller is used for judging the deviation between the current actual current and the given current value;
and the current automatic lifting subunit is used for automatically lifting the current according to the current set rate through the PLC.
Compared with the prior art, the invention at least comprises the following beneficial effects:
(1) The invention can realize one-key start of the rectification system, so that operators in the process can start the rectification system in the background of the DCS system, can automatically judge the operation and working conditions of the on-site water pump, the direct-current knife and the like, and improves the working efficiency of the operators;
(2) According to the invention, the unified operation and control of the driving of the plurality of electrolytic tank rectifying systems are realized through the DCS system.
Drawings
FIG. 1 is a general flow chart of a first embodiment of the present invention;
FIG. 2 is a flowchart of step S3 in a first embodiment of the present invention;
FIG. 3 is a flowchart of step S5 in a first embodiment of the present invention;
FIG. 4 is a flowchart of step S52 in the first embodiment of the present invention;
FIG. 5 is a schematic view of the overall framework of a second embodiment of the present invention;
FIG. 6 is a schematic diagram of a driving standard judging module according to a second embodiment of the present invention;
FIG. 7 is a schematic diagram of a frame of an adjustment module according to a second embodiment of the present invention;
fig. 8 is a schematic diagram of a frame of a current setting unit in the second embodiment of the invention.
Detailed Description
The following are specific embodiments of the present invention, and the technical solutions of the present invention are further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
Example 1
As shown in FIG. 1, the method for controlling the startup of the rectification system based on the DCS system comprises the following steps:
s1, informing an electric operator of opening a high-voltage switch through a DCS system output signal;
s2, opening the interlocking of the rectification system through the DCS system, and resetting the parking signal;
s3, detecting whether the rectification system meets a driving standard or not through a PLC (programmable logic controller) of the rectification system;
s4, when the rectifying system meets the driving standard, sending a driving signal to the rectifying system through the DCS system, and then receiving a rectifying system operation signal sent by the rectifying system;
s5, parameters of the rectifying system are adjusted through the PLC controller, so that the rectifying system can normally operate.
Further, as shown in fig. 2, step S3 specifically includes:
s31, sending a start button signal to a PLC (programmable logic controller) of the rectification system through the DCS;
s32, after receiving a start button signal, the PLC detects whether the rectification system meets a start standard according to preset process conditions;
and S33, when the rectifying system meets the driving standard, the PLC feeds back the detecting result of the rectifying system to the DCS.
In a specific operation process, a DCS system operator clicks a start driving button, and after receiving a one-key driving signal, a PLC (programmable logic controller) of the rectification system judges driving conditions and executes actions in sequence.
The specific driving judgment can sequentially carry out the following procedures: the process conditions are satisfied; detecting whether a water pump of the water purification unit is started, and if not, starting the water pump of the water purification unit; detecting whether the pure water pressure reaches more than or equal to 0.08Mpa; detecting whether the positive and negative direct current cutters are in a closed position, and if the positive and negative direct current cutters are not in a closed position, closing the positive cutters first and then closing the negative cutters; detecting that the direct current transformer is normal; the high-voltage switch is detected to be in a closing system to perform self-resetting on faults; detecting no lock pulse fault; detecting no "trip fault"; channel A is given zero return; the B channel is given a return to zero.
Under the condition that the detection is normal, the PLC can feed back a 'rectifier preparation OK' signal of the DCS system; otherwise, a "rectifier fault" signal is fed back.
Further, as shown in fig. 3, step S5 specifically includes:
s51, after receiving a rectifying operation signal, the DCS system automatically inputs an interlock;
s52, setting a given current rate and a given current value of the rectifying system through the DCS system, and secondarily confirming the given current value, so that the current of the rectifying system automatically rises and falls according to the given current value.
In a specific operation process, after receiving the 'rectifier preparation OK' signal, the DCS system sends a 'pulse combination' signal and an automatic reset 'start driving' signal to the rectification system. And when the DCS system receives a rectifier fault signal, an electric operator can be provided for troubleshooting the fault.
When the DCS system subsequently receives the 'rectifier operation' signal and the 'rectifier stop' signal disappears, the DCS system automatically inputs corresponding interlocking;
further, as shown in fig. 4, the step S52 of automatically raising and lowering the current of the rectifying system according to the given current value specifically includes:
s521, setting a given current rate and a given current value of the rectification system through the DCS system, and secondarily confirming;
s522, sending given current received by the DCS system and a given current rate to a rectification system, and judging the deviation between the current actual current and the given current value by a PLC (programmable logic controller);
s523, automatically lifting the current according to the current set rate through the PLC.
In the invention, the logic judgment of one-key driving operation and the logic control of automatic current lifting are added in the PLC controller to realize the sequential control operation of the rectification system.
The invention realizes the one-key start of the rectifying system, so that operators in the process can start the rectifying system in the background of the DCS system, can automatically judge the operation and working conditions of the on-site water pump, the direct-current knife and the like, improves the working efficiency of the operators, and can timely find faults in the rectifying system.
Example two
As shown in fig. 5, the rectification system start control system based on the DCS system of the present invention includes:
the output notification module is used for notifying an electric operator to open the high-voltage switch through a DCS system output signal;
the interlocking release module is used for opening the interlocking of the rectification system through the DCS system and resetting the parking signal;
the starting standard detection module is used for detecting whether the rectification system meets the starting standard or not through a PLC (programmable logic controller) of the rectification system;
the operation module is used for sending a driving signal to the rectification system through the DCS system when the rectification system meets the driving standard, and then receiving a rectification system operation signal sent by the rectification system;
and the adjusting module is used for adjusting parameters of the rectifying system through the PLC controller so that the rectifying system can normally operate.
As shown in fig. 6, the driving standard judging module includes:
the start button signal output unit is used for sending a start button signal to the PLC of the rectification system through the DCS;
the detection unit is used for detecting whether the rectification system meets the starting standard according to preset process conditions after the PLC receives the starting button signal;
and the detection feedback unit is used for feeding back the detection result of the rectification system to the DCS by the PLC when the rectification system meets the driving standard.
As shown in fig. 7, the adjustment module specifically includes:
the interlocking input unit is used for automatically inputting interlocking into the DCS system after receiving the rectifying operation signal;
and the current lifting unit is used for setting a given current rate and a given current value of the rectification system through the DCS system and secondarily confirming the given current value, so that the current of the rectification system automatically lifts and lowers the current according to the given current value.
As shown in fig. 8, the current setting unit includes:
and the current setting subunit is used for setting a given current rate and a given current value of the rectifying system through the DCS system and secondarily confirming the given current rate and the given current value.
The current judging subunit is used for sending the given current received by the DCS system to the rectifying system at a given current rate, and the PLC controller is used for judging the deviation between the current actual current and the given current value;
and the current automatic lifting subunit is used for automatically lifting the current according to the current set rate through the PLC.
The invention realizes the one-key start of the rectifying system, so that operators in the process can start the rectifying system in the background of the DCS system, can automatically judge the operation and working conditions of the on-site water pump, the direct-current knife and the like, improves the working efficiency of the operators, and can timely find faults in the rectifying system.
According to the invention, the DCS system can perform unified driving operation and control on the rectifying systems of the plurality of electrolytic tanks according to driving judgment conditions of different rectifying systems, so that the working efficiency of personnel is improved, and the stability of the rectifying systems is ensured.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (6)
1. The method for controlling the startup of the rectification system based on the DCS system is characterized by comprising the following steps:
s1, informing an electric operator of opening a high-voltage switch through a DCS system output signal;
s2, opening the interlocking of the rectification system through the DCS system, and resetting the parking signal;
s3, detecting whether the rectification system meets a driving standard or not through a PLC (programmable logic controller) of the rectification system;
s4, when the rectifying system meets the driving standard, sending a driving signal to the rectifying system through the DCS system, and then receiving a rectifying system operation signal sent by the rectifying system;
s5, parameters of the rectification system are adjusted through the PLC controller so that the rectification system can normally operate;
the step S3 specifically comprises the following steps:
s31, sending a start button signal to a PLC (programmable logic controller) of the rectification system through the DCS;
s32, after receiving a start button signal, the PLC detects whether the rectification system meets a start standard according to preset process conditions;
s33, when the rectifying system meets the driving standard, the PLC feeds back the detecting result of the rectifying system to the DCS;
the specific driving judgment can sequentially carry out the following procedures: the process conditions are satisfied; detecting whether a water pump of the water purification unit is started, and if not, starting the water pump of the water purification unit; detecting whether the pure water pressure reaches more than or equal to 0.08Mpa; detecting whether the positive and negative direct current cutters are in a closed position, and if the positive and negative direct current cutters are not in a closed position, closing the positive cutters first and then closing the negative cutters; detecting that the direct current transformer is normal; the high-voltage switch is detected to be in a closing system to perform self-resetting on faults; detecting no lock pulse fault; detecting no "trip fault"; channel A is given zero return; the B channel is given a return to zero.
2. The method for controlling the start-up of a rectification system based on a DCS system according to claim 1, wherein step S5 comprises:
s51, after receiving a rectifying operation signal, the DCS system automatically inputs an interlock;
s52, setting a given current rate and a given current value of the rectifying system through the DCS system, and secondarily confirming the given current value, so that the current of the rectifying system automatically rises and falls according to the given current value.
3. The method for controlling the startup of a rectification system based on a DCS system according to claim 2, wherein the step S52 of automatically raising and lowering the current according to the given current value comprises the steps of:
s521, setting a given current rate and a given current value of the rectification system through the DCS system, and secondarily confirming;
s522, sending given current received by the DCS system and a given current rate to a rectification system, and judging the deviation between the current actual current and the given current value by a PLC (programmable logic controller);
s523, automatically lifting the current according to the current set rate through the PLC.
4. A rectifying system start control system based on a DCS system, comprising:
the output notification module is used for notifying an electric operator to open the high-voltage switch through a DCS system output signal;
the interlocking release module is used for opening the interlocking of the rectification system through the DCS system and resetting the parking signal;
the starting standard detection module is used for detecting whether the rectification system meets the starting standard or not through a PLC (programmable logic controller) of the rectification system;
the operation module is used for sending a driving signal to the rectification system through the DCS system when the rectification system meets the driving standard, and then receiving a rectification system operation signal sent by the rectification system;
the adjusting module is used for adjusting parameters of the rectifying system through the PLC controller to enable the rectifying system to normally operate;
the driving standard judging module comprises:
the start button signal output unit is used for sending a start button signal to the PLC of the rectification system through the DCS;
the detection unit is used for detecting whether the rectification system meets the starting standard according to preset process conditions after the PLC receives the starting button signal;
the detection feedback unit is used for feeding back the detection result of the rectification system to the DCS by the PLC when the rectification system meets the driving standard;
the specific driving judgment can sequentially carry out the following procedures: the process conditions are satisfied; detecting whether a water pump of the water purification unit is started, and if not, starting the water pump of the water purification unit; detecting whether the pure water pressure reaches more than or equal to 0.08Mpa; detecting whether the positive and negative direct current cutters are in a closed position, and if the positive and negative direct current cutters are not in a closed position, closing the positive cutters first and then closing the negative cutters; detecting that the direct current transformer is normal; the high-voltage switch is detected to be in a closing system to perform self-resetting on faults; detecting no lock pulse fault; detecting no "trip fault"; channel A is given zero return; the B channel is given a return to zero.
5. The system of claim 4, wherein the adjusting module specifically comprises:
the interlocking input unit is used for automatically inputting interlocking into the DCS system after receiving the rectifying operation signal;
and the current lifting unit is used for setting a given current rate and a given current value of the rectification system through the DCS system and secondarily confirming the given current value, so that the current of the rectification system automatically lifts and lowers the current according to the given current value.
6. The DCS-based rectifier system start-up control system of claim 5, wherein the current setting unit comprises:
the current setting subunit is used for setting a given current rate and a given current value of the rectification system through the DCS system and secondarily confirming the given current rate and the given current value;
the current judging subunit is used for sending the given current received by the DCS system to the rectifying system at a given current rate, and the PLC controller is used for judging the deviation between the current actual current and the given current value;
and the current automatic lifting subunit is used for automatically lifting the current according to the current set rate through the PLC.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201869092U (en) * | 2010-04-26 | 2011-06-15 | Abb公司 | Power supply related equipment and frequency converter comprising same |
| CN212518690U (en) * | 2020-05-12 | 2021-02-09 | 杨立如 | Integral starting rectifying device of small-sized direct current generator set |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103510124B (en) * | 2012-06-15 | 2015-11-04 | 沈阳铝镁设计研究院有限公司 | A kind of micro grid control system of automatic adjustment electrolytic aluminum DC load and device |
| CN106406210A (en) * | 2016-08-24 | 2017-02-15 | 苏州哈度软件有限公司 | Electrolytic tank electrical equipment control system |
| CN109613937B (en) * | 2019-01-29 | 2024-02-13 | 陕西华秦新能源科技有限责任公司 | Control device of oxyhydrogen generator |
| CN212103038U (en) * | 2020-04-30 | 2020-12-08 | 洛阳三轩金研环保科技有限公司 | Centralized control system of silver electrolysis trough electrolyte |
| CN112564515A (en) * | 2020-12-22 | 2021-03-26 | 哈尔滨工业大学 | 560kA aluminum electrolysis power supply system based on switching control and control method thereof |
-
2021
- 2021-04-30 CN CN202110479772.8A patent/CN113268041B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201869092U (en) * | 2010-04-26 | 2011-06-15 | Abb公司 | Power supply related equipment and frequency converter comprising same |
| CN212518690U (en) * | 2020-05-12 | 2021-02-09 | 杨立如 | Integral starting rectifying device of small-sized direct current generator set |
Non-Patent Citations (1)
| Title |
|---|
| 离子膜整流装置的选用;郑德兴;《氯碱工业》;第48卷(第2期);全文 * |
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