CN102400900B - Automatic synchronizer control device based on distributed control system - Google Patents
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Abstract
The invention relates to an automatic synchronizer control device based on a distributed control system. When load of a speed regulating motor is increased and reduced, one end of a working coil is connected with a firing line of an alternating current power supply through a fourth or first relay, and the other end of the working coil is directly connected with a zero line of the power supply. One end of a control coil is connected with the firing line through a second relay and the first relay, and the other end of the control coil is connected with the zero line of the power supply through a third relay so as to reduce load; or one end of the control coil is connected with the zero line of the power supply through a sixth relay and the other end of the control coil is connected with the firing line of the power supply through a fifth relay and the fourth relay so as to increase load. Therefore, the working coil is only electrified in the processes of increasing and reducing load; moreover, when the load of the control coil is increased and reduced, the firing line and the zero line can be switched, the automatic control over a synchronizer speed regulating motor is realized, the device is effective and reliable, the safety of a steam feed pump is improved, and cost of operation workers is greatly reduced.
Description
Technical field
The present invention relates to a kind of synchronizer automatic controller, particularly a kind of synchronizer automatic controller based on Distributed Control System.
Background technique
At present, lack automatic mean of calculating for steam feed pump synchronizer, steam feed pump cannot be realized manipulation system far away, and the rotating speed control of synchronizer must be carried out on the spot, and this not only can affect adjusting efficiency greatly, and generation also may cause the accident.
For example, in an accident, in pump dise, person on duty finds that steam-operating drops to 2940 revs/min to revolution speed by 3021 revs/min, feed pressure is followed decline (minimum 2700 left and right of rotating speed), when bearing oil pressure rocks 0.11～0.13MPa, the outer behaviour of notice, to site inspection, finds that this steam-operating is large to pump vibration, automatic main throttle valve has turned down 1/3 of former aperture, on the spot pulse oil pressure 0.33MPa; Starting other to pump, stop, in the process of this steam-operating to pump, finding that again small turbine high pressure shaft seal is rubescent, promptly clap immediately car, this steam-operating is threaded off to pump, in 3 seconds of coasting operation, closes steam-operating to pump and steam turbine simultaneously.Maintenance is opened immediately clutch protective housing and is carried out jiggering, and turbine rotor has coiled motionless.After disintegrating, find that damage in various degree all occurs for small turbine bearing, cylinder, vapour rotor.Reason by analysis, finds that the admission flow of steam feed pump described in above-mentioned accident transfinites (code regulation is 30.5T/H to the maximum, and when actual motion, table meter shows 35T/H), causes load to gather way too fast; And, find that flow reduces duration of load application while transfiniting long again, be to cause one of principal element that current accident occurs.
There is no automatic mean of calculating, is mainly that this motor has two groups of coils, actuating coil Q1 and control coil Q2 because the control motor that described steam feed pump synchronizer is joined is AC single phase asynchronous machine; When load increase and decrease, actuating coil Q1 is charged, and to add different power supplys when the upper load increase and decrease of control coil Q2, and the live wire of ac power supply and zero line will frequently switch, and when actuating coil Q1 switches on separately, motor does not turn, long-time energising can burn out again, controls very trouble.To this, give the old DCS control system (Distributed Control System) of Heat & Control Pty Ltd. of Hollysys that adopts of pump deaerating type of cycles, cannot directly realize the control function of this AC motor; Increase control system and fastener, in existing rack, cannot carry out again; If make DC MOTOR CONTROL into, be difficult to find the motor of coupling, and motor retrofit is because site space problem, cannot accessory axial organ, and main be on-the-spot without DC electrical source, be therefore difficult to realize the automatic control of synchronizer motor.
Summary of the invention
The object of this invention is to provide a kind of synchronizer automatic controller based on Distributed Control System, utilize DCS(Distributed Control System) export feature flexibly, by DCS control system and the combination of conventional motors control principle, by flexible wiring, realize the automatic adjusting of ac adjustable speed motor in synchronizer.
In order to achieve the above object, technological scheme of the present invention is to provide a kind of synchronizer automatic controller based on Distributed Control System, it is provided with the first relay to the six relays, with the corresponding connection of speed-adjustable motor in steam feed pump synchronizer, according to the command signal of the increasing and decreasing load of providing to the Distributed Control System of pump deaerating type of cycles, to applying of ac power supply on the actuating coil of described speed-adjustable motor, and on control coil, the switching of live wire and zero line is controlled;
In the time that speed-adjustable motor is carried out to the operation of load shedding, make the port of described actuating coil first end, by the first relay of closure, be connected with the live wire of ac power supply; The port of described actuating coil the second end, is connected with the zero line of ac power supply;
Now, the port of described control coil first end, is connected with power firestreak with the first relay by the second relay of closure; The port of described control coil the second end, is connected with zero-power line by the 3rd relay of closure, realizes load shedding;
In the time speed-adjustable motor being increased to the operation of load, make the port of described actuating coil first end, by the 4th relay of closure, be connected with the live wire of ac power supply; The port of described actuating coil the second end, is connected with zero-power line;
Now, the port of described control coil first end, by the 6th relay of closure, is connected with zero-power line; The port of described control coil the second end, is connected with power firestreak with the 4th relay by the 5th relay of closure, realizes and increases load.
Described Distributed Control System provides three sub signals as one group of load shedding instruction; Three sub signals of described load shedding instruction start simultaneously or close, and the closed or disconnection simultaneously of described first, second, third relay of corresponding control.
Described Distributed Control System also provides other three sub signals to increase load instruction as one group; Three sub signals of described increasing load instruction start simultaneously or close, and correspondence is controlled described the 4th, the 5th, the 6th relay while closure or disconnects.
The startup of three sub signals of described load shedding instruction or close, the load shedding button being arranged by described Distributed Control System is controlled.
The startup of three sub signals of described increasing load instruction or close, the increasing load button being arranged by described Distributed Control System is controlled.
Described load shedding instruction and described increasing load instruction locking each other.
Some signals of described load shedding instruction and the instruction of described increasing load are by providing to relay switching variable output module for subsequent use in the Distributed Control System of pump deaerating type of cycles.
Actuating coil and control coil described in synchronizer speed-adjustable motor, it is to carry out in the on-the-spot junction box who arranges of steam feed pump separately by corresponding some relays and the wiring that live wire and the zero line of ac power supply are connected.
Compared with prior art, the synchronizer automatic controller based on Distributed Control System of the present invention, its advantage is: the present invention has utilized to carrying relay switching variable output module for subsequent use in existing DCS control system in pump deaerating type of cycles; Using increasing and decreasing load button to send after corresponding command signal, can make the actuating coil of described synchronizer speed-adjustable motor, only charged in the operating process of increasing and decreasing load; And, make described control coil in the time of increasing and decreasing load, live wire and zero line are realized and being switched, thereby have realized the automatic control of synchronizer speed-adjustable motor, and device is effectively reliable, has improved the Security of steam feed pump work, has also greatly saved and has operated artificial cost.
Brief description of the drawings
Fig. 1 is the elementary diagram that the present invention is based on the synchronizer automatic controller of Distributed Control System.
Embodiment
Below in conjunction with brief description of the drawings the specific embodiment of the present invention.
Give in the steam feed pump synchronizer of pump deaerating type of cycles, the speed-adjustable motor of joining is AC single phase asynchronous machine; Synchronizer automatic controller based on Distributed Control System of the present invention, applies the upper ac power supply of the actuating coil Q1 of this synchronizer motor, and the upper Live line Zero line switching of control coil Q2 etc. is controlled automatically.
In the time realizing speed-regulating function, in described synchronizer automatic controller, be provided with load shedding button and increase the corresponding control command of sending of load button; Wherein, described load shedding pushbutton enable, can send three sub signals: CHDOBY16, CHDOBY17, CHDOBY18, sets this three sub signal as one group of load shedding instruction conducting simultaneously in button attribute; Described increasing load pushbutton enable, can send three sub signals: CHDOBY19, CHDOBY20, CHDOBY21, sets this three sub signal and increases load instruction conducting simultaneously as one group.Locking each other between two groups of signals of described increasing and decreasing load instruction, that is to say, described increasing load three sub signals of instruction and three sub signals of described load shedding instruction will can not start simultaneously.
Realize to described in utilizing the duplicate relay output module carrying in existing DCS control system (Distributed Control System) in pump deaerating type of cycles.For example, while using the DCS control system of Heat & Control Pty Ltd. of Hollysys, can directly use wherein FM171 model Shi six road relay switching variable output modules, export six sub signals of above-mentioned two groups of increasing and decreasing load instructions.Above-mentioned signal is pressed the designed schematic diagram wiring of Fig. 1 afterwards in output.
As shown in Figure 1, in synchronizer automatic controller of the present invention, install first, second, third relay, received respectively three sub signal CHDOBY16 of described one group of load shedding instruction, the control of CHDOBY17, CHDOBY18; Also be provided with the 4th, the 5th, the 6th relay, receive respectively described one group and increase three sub signal CHDOBY19 of load instruction, the control of CHDOBY20, CHDOBY21.
In the process of load shedding operation, control described three sub signal CHDOBY16, CHDOBY17, CHDOBY18 conducting simultaneously, make first, second, third relay closes.Now, the port A63 of actuating coil Q1 one end of synchronizer speed-adjustable motor, the live wire 220V(A via the first relay of closure, circuit breaker Q F with 220V ac power supply) be connected; The port N61 of the actuating coil Q1 the other end, by circuit breaker Q F and zero-power line 220V(N) be connected.The port A65 of control coil Q2 one end of synchronizer speed-adjustable motor, via the second relay of closure and the first relay, circuit breaker Q F, with the live wire 220V(A of 220V ac power supply) be connected; The port A67 of the control coil Q2 the other end, via the 3rd relay, the circuit breaker Q F of closure, with zero-power line 220V(N) be connected.
Increasing in the process of load operation, control described three sub signal CHDOBY19, CHDOBY20, CHDOBY21 conducting simultaneously, make the 4th, the 5th, the 6th relay closes.Now, the port A63 of the actuating coil Q1 of synchronizer speed-adjustable motor, via the 4th relay of closure and the live wire 220V(A of 220V ac power supply) be connected; The port N61 of actuating coil Q1 and zero-power line 220V(N) be connected.The port A65 of control coil Q2, via the 6th relay and the zero-power line 220V(N of closure) be connected; The port A67 of control coil Q2, via the 5th relay and the 4th relay of closure, with the live wire 220V(A of 220V ac power supply) be connected.
That is to say, in speed regulation process, do not need actuating coil Q1 to switch on for a long time, only in the time increasing the operation of load or load shedding, just control actuating coil Q1 charged, make its port A63 meet power firestreak 220V(A), port N61 meets zero-power line 220V(N).When the port A65 of control coil Q2 meets power firestreak 220V(A), port A67 meets zero-power line 220V(N) time, realize load shedding; When the port A67 of control coil Q2 meets power firestreak 220V(A), port A65 meets zero-power line 220V(N) time, realize and increase load.And, between two groups of command signals due to increasing and decreasing load, set locking each other, first, second, third relay and the 4th, the 5th, the 6th relay be not adhesive simultaneously just, thereby can avoid ac power supply live wire, zero line to meet and discuss, and prevents from quick-fried fuse and jump electrical phenomena occurring.
Coordinate the elementary diagram referring to Fig. 1, for the ease of wiring and later looking up the fault, the wiring of above-mentioned some relays and ac power supply and synchronizer speed-adjustable motor is specifically carried out in the on-the-spot junction box who arranges of steam feed pump, and wiring situation is as shown in table 1.
Corresponding with Fig. 1, the port of label I1, I2 in table 1, directly with power firestreak 220V(A in power cabinet) and zero-power line 220V(N) corresponding connection.
Table 1
The port of label I4 ~ I15, corresponding the first port and the second port arranging on the first to the 6th relay, its corresponding totally six sub signal controls of accepting described increasing and decreasing load instruction:, the first relay has the first port I4 and the second port I5, it is corresponding accept described to signal CHDOBY16-1 in the DCS control cabinet of pump deaerating type of cycles ,-2 control; The second relay has the first port I6 and the second port I7, it is corresponding accept described to signal CHDOBY17-1 in the DCS control cabinet of pump deaerating type of cycles ,-2 control; The corresponding relation of other ports and control signal can be by that analogy.
In addition, the port of label I5, I7, I8, I9, is directly connected with the actuating coil Q1 of synchronizer speed-adjustable motor or the corresponding port of control coil Q2.The port of label I4, I6, I10 ~ I15, or separately by the port of docking described I5, I7, I8 or I9, be connected with described actuating coil Q1 or control coil Q2; Or separately by the described port I1 of docking or I2, with power firestreak 220V(A) and zero-power line 220V(N) be connected.The port N61 of described actuating coil Q1, also by craft port I2 and zero-power line 220V(N) be connected.
In same a line of table 1, some ports shown in secondary series, dock with the same port in the 3rd row by butted line: for example, the second port I5 of the first relay, respectively with the port A63 of actuating coil Q1, the first port I6 of the second relay, the second port I11 of the 4th relay, the corresponding connection of the first port I12 of the 5th relay.The situation of the docking of port shown in table 1, corresponding mutually in Fig. 1, repeat no more herein.Port I3, the I16 ~ I20 of other settings are for subsequent use.
In sum, synchronizer automatic controller of the present invention, has utilized to carrying relay switching variable output module for subsequent use in existing DCS control system in pump deaerating type of cycles; Using increasing and decreasing load button to send after corresponding command signal, can make the actuating coil Q1 of described synchronizer speed-adjustable motor, only charged in the operating process of increasing and decreasing load; And, make described control coil Q2 in the time of increasing and decreasing load, live wire and zero line are realized and being switched, thereby have realized the automatic control of synchronizer speed-adjustable motor, and device is effectively reliable, has improved the Security of steam feed pump work, has also greatly saved and has operated artificial cost.
Although content of the present invention has been done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.Read after foregoing those skilled in the art, for multiple amendment of the present invention and substitute will be all apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (8)
1. the synchronizer automatic controller based on Distributed Control System, it is characterized in that, be provided with the first relay to the six relays, with the corresponding connection of speed-adjustable motor in steam feed pump synchronizer, according to the command signal of the increasing and decreasing load of providing to the Distributed Control System of pump deaerating type of cycles, applying of the upper ac power supply of actuating coil (Q1) to described speed-adjustable motor, and the switching of the upper live wire of control coil (Q2) and zero line is controlled;
In the time that speed-adjustable motor is carried out to the operation of load shedding, make the port (A63) of described actuating coil (Q1) first end, be connected with the live wire of ac power supply by the first relay of closure; The port (N61) of described actuating coil (Q1) the second end is connected with zero-power line;
Now, the port (A65) of described control coil (Q2) first end, by the second relay and first relay of closure, is connected with power firestreak; The port (A67) of described control coil (Q2) the second end, is connected with zero-power line by the 3rd relay of closure, realizes load shedding;
In the time speed-adjustable motor being increased to the operation of load, make the port (A63) of described actuating coil (Q1) first end, be connected with the live wire of ac power supply by the 4th relay of closure; The port (N61) of described actuating coil (Q1) the second end, is connected with the zero-power line of ac power supply;
Now, the port (A65) of described control coil (Q2) first end, is connected with zero-power line by the 6th relay of closure; The port (A67) of described control coil (Q2) the second end, by the 5th relay and the 4th relay of closure, is connected with power firestreak, realizes and increases load.
2. the synchronizer automatic controller based on Distributed Control System as claimed in claim 1, is characterized in that, described Distributed Control System provides three sub signals (CHDOBY16, CHDOBY17, CHDOBY18) as one group of load shedding instruction; Three sub signals of described load shedding instruction start simultaneously or close, and the closed or disconnection simultaneously of described first, second, third relay of corresponding control.
3. the synchronizer automatic controller based on Distributed Control System as claimed in claim 2, is characterized in that, described Distributed Control System provides other three sub signals (CHDOBY19, CHDOBY20, CHDOBY21) to increase load instruction as one group; Three sub signals of described increasing load instruction start simultaneously or close, and correspondence is controlled described the 4th, the 5th, the 6th relay while closure or disconnects.
4. the synchronizer automatic controller based on Distributed Control System as claimed in claim 3, is characterized in that, the startup of three sub signals of described load shedding instruction or close, and the load shedding button being arranged by described Distributed Control System is controlled.
5. the synchronizer automatic controller based on Distributed Control System as claimed in claim 4, is characterized in that, the startup of three sub signals of described increasing load instruction or close, and the increasing load button being arranged by described Distributed Control System is controlled.
6. the synchronizer automatic controller based on Distributed Control System as described in claim 3 or 5, is characterized in that, described load shedding instruction and described increasing load instruction locking each other.
7. the synchronizer automatic controller based on Distributed Control System as claimed in claim 6, it is characterized in that, some signals of described load shedding instruction and the instruction of described increasing load are by providing to relay switching variable output module for subsequent use in the Distributed Control System of pump deaerating type of cycles.
8. the synchronizer automatic controller based on Distributed Control System as claimed in claim 7, it is characterized in that, actuating coil described in synchronizer speed-adjustable motor (Q1) and control coil (Q2), it is to carry out in the on-the-spot junction box who arranges of steam feed pump separately by corresponding some relays and the wiring that live wire and the zero line of ac power supply are connected.
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| CN201110298838.XA CN102400900B (en) | 2011-09-28 | 2011-09-28 | Automatic synchronizer control device based on distributed control system |
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| CN201110298838.XA CN102400900B (en) | 2011-09-28 | 2011-09-28 | Automatic synchronizer control device based on distributed control system |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55131594A (en) * | 1979-03-29 | 1980-10-13 | Nippon Air Brake Co Ltd | Air compressor control mechanism |
| CN2206512Y (en) * | 1994-11-05 | 1995-08-30 | 黄忠益 | Double-power-supply full-automatic switching device |
| CN200968278Y (en) * | 2006-11-17 | 2007-10-31 | 贵阳铝镁设计研究院 | No-shutdown change-over circuit for local and remote controlling |
| CN101572494A (en) * | 2009-06-17 | 2009-11-04 | 雷勋华 | Method for frequency and phase conversion for alternating straight-polarity power supply and reversed-polarity power supply by mechanical way |
| CN202417899U (en) * | 2011-09-28 | 2012-09-05 | 上海高桥捷派克石化工程建设有限公司 | Synchronizer automatic control device based on DCS (Distributed Control System) |
-
2011
- 2011-09-28 CN CN201110298838.XA patent/CN102400900B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55131594A (en) * | 1979-03-29 | 1980-10-13 | Nippon Air Brake Co Ltd | Air compressor control mechanism |
| CN2206512Y (en) * | 1994-11-05 | 1995-08-30 | 黄忠益 | Double-power-supply full-automatic switching device |
| CN200968278Y (en) * | 2006-11-17 | 2007-10-31 | 贵阳铝镁设计研究院 | No-shutdown change-over circuit for local and remote controlling |
| CN101572494A (en) * | 2009-06-17 | 2009-11-04 | 雷勋华 | Method for frequency and phase conversion for alternating straight-polarity power supply and reversed-polarity power supply by mechanical way |
| CN202417899U (en) * | 2011-09-28 | 2012-09-05 | 上海高桥捷派克石化工程建设有限公司 | Synchronizer automatic control device based on DCS (Distributed Control System) |
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