CN114664064B - Alarm device of cooler and transformer system - Google Patents
Alarm device of cooler and transformer system Download PDFInfo
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- CN114664064B CN114664064B CN202210439438.4A CN202210439438A CN114664064B CN 114664064 B CN114664064 B CN 114664064B CN 202210439438 A CN202210439438 A CN 202210439438A CN 114664064 B CN114664064 B CN 114664064B
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B7/00—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00
- G08B7/06—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources
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Abstract
The application relates to an alarm device of a cooler and a transformer system. The alarm device comprises a logic OR module, a logic NOT module, a first logic AND module and an alarm module; the logic or module is used for acquiring a first level signal output by a first normally open contact connected with a power supply of the cooler; the logic NOT module is used for acquiring a second level signal output by a second normally open contact connected with the cooler; the first logic AND module is used for acquiring a disconnecting link switching state signal of the isolating disconnecting link, determining a first logic result according to the disconnecting link switching state signal, the first level signal and the second level signal, and outputting the first logic result to the alarm module so that the alarm module determines to output an alarm signal according to the first logic result. By adopting the device, the running risk can be reduced.
Description
Technical Field
The application relates to the technical field of nuclear power, in particular to an alarm device of a cooler and a transformer system.
Background
The power transmission and the power failure of a transformer in a nuclear power plant can influence the starting and stopping of a cooler of the transformer, the cooler is started when the transformer transmits power, and the cooler is stopped when the transformer fails.
At present, an isolation disconnecting link is required to be manually operated to supply power to a transformer or stop power supply, and then the starting and stopping of a cooler are controlled according to the state of the expanding point intermediate relay. For example, when the isolating switch is switched on, the point-expanding intermediate relay is powered off, so that the cooler is started; when the isolating knife switch is opened, the intermediate relay at the expanding point is electrified, so that the cooler is stopped.
However, in the event of an abnormal operation of the cooler, the current mode of operation presents an operational risk.
Disclosure of Invention
In view of the foregoing, it is desirable to provide an alarm device for a cooler and a transformer system capable of giving an alarm when the cooler is abnormally operated.
In a first aspect, the present application provides an alarm device for a cooler, the alarm device comprising a logic or module, a logic not module, a first logic and module, and an alarm module;
the logic or module is used for acquiring a first level signal output by a first normally open contact connected with a power supply of the cooler;
the logic NOT module is used for acquiring a second level signal output by a second normally open contact connected with the cooler;
the first logic AND module is used for acquiring a disconnecting link switching state signal of the isolating disconnecting link, determining a first logic result according to the disconnecting link switching state signal, the first level signal and the second level signal, and outputting the first logic result to the alarm module so that the alarm module can determine and output an alarm signal according to the first logic result.
In one embodiment, the logic or module is further configured to output a second logic result to the first logic and module according to the first level signal;
the logic NOT module is further used for outputting a third logic result to the first logic AND module according to the second level signal;
the first logic AND module is further configured to determine the first logic result according to the switch opening/closing status signal, the second logic result and the third logic result
In one embodiment, the number of the second normally open contacts is N, and the alarm device further includes N-1 second logical and modules, where each second logical and module forms a serial logical and circuit, where N is an integer greater than 0;
the serial logic AND circuit is used for determining a fourth logic result according to the second level signals output by the N second normally open contacts and outputting the fourth logic result to the logic NOT module;
the logic NOT module is used for performing NOT logic operation on the fourth logic result to obtain the third logic result, and outputting the third logic result to the first logic AND module.
In one embodiment, a first and second and module in the serial logic and circuit is connected with two second normally-open contacts, and is used for acquiring second level signals output by the two second normally-open contacts, and determining a logic and result according to the acquired second level signals;
the other second logic AND modules in the serial logic AND circuit are respectively connected with a corresponding second normally-open contact and are used for obtaining a second level signal output by the corresponding second normally-open contact;
the other second logical AND modules in the serial logical AND circuit are used for acquiring the logical AND result output by the last second logical AND module and determining the logical AND result output by the second logical AND module according to the acquired second level signal and the logical AND result, wherein the fourth logical AND result is the logical AND result output by the N-1 second logical AND module.
In one embodiment, the alarm device further includes a third logical and module, two input ends of the third logical and module are respectively connected with the output end of the logical or module and the output end of the logical not module, the output end of the third logical and module is connected with the first input end of the first logical and module, and the output end of the first logical and module is connected with the input end of the alarm module.
In one embodiment, the second input end of the first logic and module is connected to one end of the isolation switch, and is configured to receive a switch on/off state signal output by the isolation switch.
In one embodiment, the two inputs of the logic or module are respectively connected to the outputs of the two first normally open contacts.
In one embodiment, the power supply of the cooler includes a main power supply and a standby power supply, where the main power supply and the standby power supply are respectively connected with the input ends of the corresponding first normally open contacts.
In one embodiment, the alarm module is configured to output the alarm signal when the first logic result indicates that the isolation switch is triggered by mistake to cause the cooler to stop working.
In a second aspect, the application also provides a transformer system comprising a transformer, a cooler connected to the transformer and an alarm device as described in any of the preceding claims.
The alarm device of the cooler and the transformer system comprise a logic OR module, a logic NOT module, a first logic AND module and an alarm module; the logic or module is used for acquiring a first level signal output by a first normally open contact connected with a power supply of the cooler; the logic NOT module is used for acquiring a second level signal output by a second normally open contact connected with the cooler; the first logic AND module is used for acquiring a disconnecting link switching state signal of the isolating disconnecting link, determining a first logic result according to the disconnecting link switching state signal, the first level signal and the second level signal, and outputting the first logic result to the alarm module so that the alarm module can determine and output an alarm signal according to the first logic result. In this embodiment, because the alarm device of the cooler can be according to the switch state signal, combine first level signal and second level signal to confirm whether output alarm signal, consequently, the condition that the cooler is unusual has been caused to the isolation switch of manual misoperation been considered to the cooling alarm device of this embodiment to can in time send out the warning, thereby this embodiment has solved the problem that exists the operation risk in the traditional operation mode, has reduced the operation risk.
Drawings
FIG. 1 is a schematic diagram of a conventional circuit for isolating auxiliary contacts of a knife switch;
FIG. 2 is a schematic circuit diagram of a prior art extended-point intermediate relay;
FIG. 3 is a schematic circuit diagram of a K145-K147 relay in the prior art;
FIG. 4 is a schematic diagram of a conventional control cooler;
FIG. 5 is a schematic diagram of a conventional alarm circuit;
FIG. 6 is a schematic diagram of the alarm device of the cooler of the present application;
FIG. 7 is a schematic diagram of the connection of the alarm device of the cooler of the present application;
FIG. 8 is a schematic diagram of a DCS of a middle alarm device of a transformer system;
FIG. 9 is a schematic diagram of an alarm screen of the transformer system;
FIG. 10 is a schematic circuit diagram of an optimized isolation switch auxiliary contact in the present application;
FIG. 11 is a schematic diagram of the logic configuration of the alarm device of the cooler of the present application.
Detailed Description
The numbering of the components itself, e.g. "first", "second", etc., is used herein merely to distinguish between the described objects and does not have any sequential or technical meaning. The term "coupled" as used herein includes both direct and indirect coupling (coupling), unless otherwise indicated. In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
In the present application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
At present, the power transmission and the power failure of a transformer in a nuclear power plant can influence the starting and stopping of a cooler of the transformer, the cooler is started when the transformer transmits power, and the cooler is stopped when the transformer fails. Fig. 1 to 5 are schematic diagrams of the operation mode of a cooler in the conventional art.
Fig. 1 is a circuit schematic diagram of an auxiliary contact of an isolation switch in the conventional technology. HZTB is an auxiliary contact of the isolating switch on the high voltage side of the transformer, and is a normally closed contact. When the isolating switch is manually operated to break, the power transmission of the transformer is stopped, and the isolating switch auxiliary contact HZTB is closed; when the isolating switch is manually operated to switch on, power is transmitted to the transformer, and the isolating switch auxiliary contact HZTB is disconnected.
Fig. 2 is a circuit schematic diagram of a point-expansion intermediate relay in the conventional technology. Further, with reference to fig. 1 and fig. 2, when the isolating switch is opened, the isolating switch auxiliary contact HZTB is closed, the intermediate relay ZJ1 is powered on, and then the normally open switch of ZJ1 is closed, so that the K145 relay, the K146 relay and the K147 relay are powered on. When the isolating switch is switched on, the isolating switch auxiliary contact HZTB is disconnected, the intermediate relay ZJ1 is powered off, and then the ZJ1 normally open switch is disconnected, so that the K145 relay, the K146 relay and the K147 relay are powered off.
Fig. 3 is a circuit schematic diagram of a K145-K147 relay in the conventional art. Referring to fig. 3, when the K145 relay, the K146 relay, and the K147 relay are powered on, the K145 normally closed switch, the K146 normally closed switch, and the K147 normally closed switch are all turned off, so that the KM11 relay, the KM12 relay, the KM13 relay, the KM14 relay, the KM15 relay, the KM16 relay, and the KM101 relay are all powered off. When the K145 relay, the K146 relay and the K147 relay lose electricity, the K145 normally-closed switch, the K146 normally-closed switch and the K147 normally-closed switch are all closed, so that the KM11 relay, the KM12 relay, the KM13 relay, the KM14 relay, the KM15 relay, the KM16 relay and the KM101 relay are all electrified.
Fig. 4 is a circuit diagram of a control cooler in the prior art. Referring to fig. 4, the km11 relay-KM 16 relay is powered on or powered off to control the on or off of the K126 normally open switch-K131 normally open switch respectively. More specifically, when the KM11 relay is powered on, the K126 normally open switch is closed, and when the KM11 relay is powered off, the K126 normally open switch is opened. The principles of the KM12 relay control K127 normally open switch, the KM13 relay control K128 normally open switch, the KM14 relay control K129 normally open switch, the KM15 relay control K130 normally open switch and the KM16 relay control K131 normally open switch are the same, and are not repeated here. Further, the K126 normally open switch-K131 normally open switch respectively controls the start or stop of the No. 1-No. 6 coolers. Specifically, when the K126 normally open switch is closed, the No. 1 cooler receives a throw-in signal, and then the No. 1 cooler starts to operate; when the K126 normally open switch is opened, the No. 1 cooler stops running, and so on.
Fig. 5 is a circuit schematic diagram of an alarm circuit in the prior art. Wherein the KM11 normally closed switch-KM 16 normally closed switch is controlled by the KM11 relay-KM 16 relay respectively. Specifically, when the KM11 relay is powered on, the KM11 normally-closed switch is opened, when the KM11 relay is powered off, the KM11 normally-closed switch is closed, and so on. The KMS1 normally-closed switch and the KMS2 normally-closed switch are controlled by a KMS1 contactor and a KMS2 contactor respectively. The cooler is provided with two paths of power supplies, namely a first-stage power supply and a second-stage power supply, when the first-stage power supply is started, the KMS1 contactor is powered on, and then the normally closed switch of the KMS1 is disconnected; when one section of power supply is stopped, the KMS1 contactor is powered off, and then the KMS1 normally-closed switch is closed. When the two-stage power supply is started, the KMS2 contactor is powered on, and then the normally closed switch of the KMS2 is disconnected; when the two-stage power supply is stopped, the KMS2 contactor is powered off, and then the KMS2 normally-closed switch is closed. The K147 normally closed switch is controlled by a K147 relay, and is not described herein.
Referring to fig. 1 to 5, in a normal state, if the isolating switch is manually operated to open (i.e. the transformer fails), the relay ZJ1 is powered on, and the ZJ1 normally open switch is closed. And then the K145 relay, the K146 relay and the K147 relay are powered. Further, the K145 normally-closed switch, the K146 normally-closed switch and the K147 normally-closed switch are disconnected, the KM11 relay, the KM12 relay, the KM13 relay, the KM14 relay, the KM15 relay and the KM16 relay are all powered off, so that the K126 normally-open switch-K131 normally-open switch is all disconnected, and all coolers stop running. Because the K147 normally closed switch is opened, the KM101 relay is powered off, so that an alarm loop is not closed, and an alarm is not sent out at the moment.
If the isolation disconnecting link is manually operated to be closed (namely, the transformer is powered on), the relay ZJ1 is powered off, and the ZJ1 normally open switch is disconnected. And then the K145 relay, the K146 relay and the K147 relay lose power. Further, the K145 normally-closed switch, the K146 normally-closed switch and the K147 normally-closed switch are closed, the KM11 relay, the KM12 relay, the KM13 relay, the KM14 relay, the KM15 relay and the KM16 relay are all electrified, so that the K126 normally-open switch-K131 normally-open switch is all closed, and all coolers are all started to run.
When the isolating knife switch is switched on, the K147 normally closed switch is closed, and the K101 relay is electrified. If at this time, the first-stage power supply and the second-stage voltage of the K147 normally-open switch cooler stop working completely, then the KMS1 normally-closed switch and the KMS2 normally-closed switch are closed, and the alarm loop is closed, so that an alarm is given. Or if the KM11 relay-KM 16 relay is abnormal, the cooler stops working completely, the KM11 normally closed switch-KM 16 normally closed switch is also closed completely, and the alarm loop is closed, so that an alarm is sent out.
However, in the traditional operation mode, if the situation that the auxiliary contact HZTB is closed by mistake or the intermediate relay ZJ1 is in misoperation to obtain electricity occurs in the process of operating the actual cooler by manual misoperation of the isolating switch to open the switch, the K145 relay-K147 relay is powered on, the K145 normally-closed switch-K147 normally-closed switch is disconnected, and the KM11 relay-KM 16 relay and the KM101 relay are powered off, so that the cooler can be completely stopped. And because the K147 normally closed switch is opened and the K101 relay is powered off under the condition, an alarm can not be sent out, and thus, the operation risk exists.
In view of the above, it is necessary to provide an alarm device for a cooler.
Fig. 6 is a schematic structural diagram of an alarm device of a cooler according to the present application, and as shown in fig. 6, an alarm device 600 of a cooler according to the present application includes a logic or module 601, a logic not module 602, a first logic and module 603, and an alarm module 604.
The logic or module 601 is configured to obtain a first level signal output by a first normally open contact connected to a power supply of the cooler.
The first normally open contact is closed when the power supply of the cooler is normal, and is opened when the power supply of the cooler is abnormal. The first level signal may be a high level signal when the first normally open contact is closed, a low level signal when the first normally open contact is open, or a logic signal, for example, a signal of logic 1 when the first normally open contact is closed, or a signal of logic 0 when the first normally open contact is closed.
And the logic NOT module 602 is used for acquiring a second level signal output by a second normally-open contact connected with the cooler.
The second normally open contact is closed when the cooler is in normal operation, and is opened when the cooler is out of operation. Similarly, the second level signal may be a high level signal when the second normally open contact is closed, a low level signal when the second normally open contact is open, or a logic signal, for example, a signal of logic 1 when the second normally open contact is closed, or a signal of logic 0 when the second normally open contact is closed.
The first logic and module 603 is configured to obtain a switch on/off state signal of the isolation switch, determine a first logic result according to the switch on/off state signal, the first level signal, and the second level signal, and output the first logic result to the alarm module 604, so that the alarm module 604 determines to output an alarm signal according to the first logic result.
When the isolating disconnecting link is a disconnecting link, the disconnecting link on-off state signal is a signal of logic 1; when the isolating switch is the switch-off, the switch-on and switch-off state signal is a logic 0 signal. Further, the auxiliary contact HZTB or the intermediate relay ZJ1 at the disconnecting link position affects the switch on/off state signal. Specifically, when the auxiliary contact HZTB at the disconnecting link disconnecting position is closed, the disconnecting link opening and closing state signal is a signal of logic 1; when the auxiliary contact HZTB at the disconnecting link disconnecting position is disconnected, the disconnecting link switching state signal is a logic 0 signal. When the expanding point intermediate relay ZJ1 is closed, the switch opening and closing state signal is a logic 1 signal; when the point-expanding intermediate relay ZJ1 is disconnected, the disconnecting link on-off state signal is a logic 0 signal. One way to achieve this is that the switch open/close status signal is a logic 1 signal as long as the isolating switch is open, the isolating switch open position auxiliary contact HZTB is closed or the expanding intermediate relay ZJ1 is closed. Of course, the switch on/off state signal may be a different level signal, which is not limited in this embodiment.
Further, the alarm device 600 of the cooler determines the first logic result according to the switch on/off state signal, the first level signal and the second level signal. For example, when the switch on/off state signal is a logic 1 signal and the first level signal and the second level signal are both high, the first logic result is a logic 1 result. Wherein the first logical result is a logical result, the first logical result being either a logical 1 result or a logical 0 result.
Further, the alarm module 604 receives the first logic result, so that the alarm module 604 determines to output an alarm signal according to the first logic result. For example, the alarm module 604 receives a first logic result, and outputs an alarm signal when the first logic result is logic 1. It can be appreciated that the alarm module 604 can be connected to a reminding device such as a flash lamp and a loudspeaker, and the reminding device sends out a reminder when receiving an alarm signal.
The alarm device of the cooler provided by the embodiment comprises a logic OR module, a logic NOT module, a first logic AND module and an alarm module, wherein the logic OR module is used for acquiring a first level signal output by a first normally-open contact connected with a power supply of the cooler; the logic NOT module is used for acquiring a second level signal output by a second normally open contact connected with the cooler; the first logic AND module is used for acquiring a disconnecting link switching state signal of the disconnecting link, determining a first logic result according to the disconnecting link switching state signal, the first level signal and the second level signal, and outputting the first logic result to the alarm module so that the alarm module can determine and output an alarm signal according to the first logic result. In this embodiment, because the alarm device of the cooler can be according to the switch state signal, combine first level signal and second level signal to confirm whether output alarm signal, consequently, the condition that the cooler is unusual has been led to the fact to the isolation switch of manual misoperation to the cooling alarm device of this embodiment has been considered to can in time send the warning, thereby the problem that exists the operation risk in the traditional operation mode has been solved to this embodiment, has reduced the operation risk.
Furthermore, in the embodiment, the situation that the auxiliary contact is closed by mistake at the disconnecting link disconnecting position or the cooler is stopped completely after the relay in the expanded point is in a misoperation can be identified, and then an alarm is sent.
Optionally, the logic or module is further configured to output a second logic result to the first logic and module according to the first level signal; the logic NOT module is also used for outputting a third logic result to the first logic AND module according to the second level signal; the first logic AND module is further used for determining a first logic result according to the switch on-off state signal, the second logic result and the third logic result.
In this embodiment, the second logic result, the third logic result and the switch open/close status signal are all logic signals, i.e. are either logic 1 or logic 0.
The logic or module may output a second logic result to the first logic and module according to the first level signal. For example, when the first level signal is high, the second logic result is logic 1, and when the second level signal is low, the second logic result is logic 0.
Similarly, the logic NOT module outputs a third logic result to the first logic AND module according to the second level signal. For example, when the second level signal is at a high level, the third logic result is a logic 1.
The first logic AND module determines a first logic result according to the switch on-off state signal, the second logic result and the third logic result. One implementation manner is that the first logic and module is logic 1 only when the switch on/off status signal, the second logic result and the third logic result are all logic 1, otherwise the first logic result is logic 0.
The logic or module in this embodiment is further configured to output a second logic result to the first logic and module according to the first level signal; the logic NOT module is also used for outputting a third logic result to the first logic AND module according to the second level signal; the first logic AND module is further used for determining a first logic result according to the switch on-off state signal, the second logic result and the third logic result. Further, according to the embodiment, the first logic result can be determined according to the switch on-off state signal, the first level signal and the second level signal, so that an alarm signal is output, and the running risk is reduced.
Optionally, the number of the second normally open contacts is N, and the alarm device further comprises N-1 second logical and modules, each second logical and module forms a serial logical and circuit, wherein N is an integer greater than 0; the series logic AND circuit is used for determining a fourth logic result according to the second level signals output by the N second normally open contacts and outputting the fourth logic result to the logic NOT module; and the logic NOT module is used for performing NOT logic operation processing on the fourth logic result to obtain a third logic result and outputting the third logic result to the first logic AND module.
In this embodiment, the logic or module obtains N first level signals of N second normally open contacts, and a serial logic and circuit formed by each second logic and module is configured to determine a fourth logic result according to the determination, where the fourth logic result is also a logic signal.
The logic NOT module receives a fourth logic result and performs NOT logic operation on the fourth logic result, and when the fourth logic result is logic 1, the third logic result output by the logic NOT module is logic 0; when the fourth logic result is logic 0, the third logic result output by the logic not module is logic 1.
In this embodiment, the number of the second normally open contacts is N, and the alarm device further includes N-1 second logical and modules, where N is an integer greater than 0; the series logic AND circuit is used for determining a fourth logic result according to the second level signals output by the N second normally open contacts and outputting the fourth logic result to the logic NOT module; and the logic NOT module is used for performing NOT logic operation processing on the fourth logic result to obtain a third logic result and outputting the third logic result to the first logic AND module, so that the speed and the efficiency of determining the first logic result by the alarm device of the cooler are improved.
Optionally, a first logic AND module in the serial logic AND circuit is connected with the two second normally-open contacts, and is used for acquiring second level signals output by the two second normally-open contacts, and determining a logic AND result according to the acquired second level signals; the other second logic AND modules in the serial logic AND circuit are respectively connected with a corresponding second normally-open contact and are used for acquiring a second level signal output by the corresponding second normally-open contact; and the other second logical AND modules in the serial logical AND circuit are used for acquiring the logical AND result output by the last second logical AND module and determining the logical AND result output by the second logical AND module according to the acquired second level signal and the logical AND result, wherein the fourth logical AND result is the logical AND result output by the N-1 second logical AND module.
In the present embodiment, if there are 4 second normally open contacts (second normally open contact 1, second normally open contact 2, second normally open contact 3, and second normally open contact 4) and 3 second logical AND modules (second logical AND module 1, second logical AND module 2, and second logical AND module 3). The second logical AND module 1 acquires the second level signals of the second normally-open contact 1 and the second normally-open contact 2, and determines a logical AND result 1. Further, the second logic and module 2 obtains the logic and result 1 and the second level signal of the second normally open contact 3, and determines the logic and result 2 according to the logic and result 1 and the second level signal of the second normally open contact 3. Further, the second and module 3 obtains the second level result of the and result 2 and the second normally open contact 4, determines the and result 3, and the and result 3 is the fourth logic result.
It will be appreciated that the order of the second logic and modules and the second normally open contacts may be adjusted, and the present embodiment is not limited.
In this embodiment, a first and a second and modules in the serial logic and circuits are connected with two second normally-open contacts, and are used for obtaining second level signals output by the two second normally-open contacts, and determining a logic and result according to the obtained second level signals; the other second logic AND modules in the serial logic AND circuit are respectively connected with a corresponding second normally-open contact and are used for acquiring a second level signal output by the corresponding second normally-open contact; and the other second logical AND modules in the serial logical AND circuit are used for acquiring the logical AND result output by the last second logical AND module and determining the logical AND result output by the second logical AND module according to the acquired second level signal and the logical AND result, wherein the fourth logical AND result is the logical AND result output by the N-1 second logical AND module. Therefore, the alarm device of the cooler provided by the embodiment can accurately output an alarm signal.
Optionally, the alarm device further includes a third logical and module, two input ends of the third logical and module are respectively connected with the output end of the logical or module and the output end of the logical non-module, the output end of the third logical and module is connected with the first input end of the first logical and module, and the output end of the first logical and module is connected with the input end of the alarm module.
Fig. 7 is a schematic diagram of connection relation of the alarm device of the cooler according to the present application, as shown in fig. 7, in this embodiment, the output end of the logic or module 701 and the output end of the logic not module 702 are connected to the third logic and module 703, the output end of the third logic and module 703 is connected to the first input end of the first logic and module 704, and the output end of the first logic and module 704 is connected to the input end of the alarm module 705.
Optionally, the second input end of the first logic AND module is connected with one end of the isolation switch, and is used for receiving a switch on-off state signal output by the isolation switch.
With continued reference to fig. 7, a second input terminal of the first logic and module 704 is connected to one end of the isolation switch 706, for receiving a switch on/off state signal output by the isolation switch.
The alarm device in this embodiment further includes a third logical and module, where two input ends of the third logical and module are connected to the output end of the logical or module and the output end of the logical not module, respectively, the output end of the third logical and module is connected to the first input end of the first logical and module, the output end of the first logical and module is connected to the input end of the alarm module, and the second input end of the first logical and module is connected to one end of the isolation knife for receiving the switch on/off status signal output by the isolation knife. Therefore, the implementation comprehensively considers the situations of abnormal coolers such as false operation of the isolating switch, false closing of auxiliary contacts at the isolating switch opening position or false operation of the point-expanding intermediate relay, and the like, and can give an alarm to reduce the running risk.
Of course, fig. 7 is only an alternative connection of the alarm device of the present application. Alternatively, the output of the logic or module 702 and the switch opening/closing signal output by the isolation switch 706 are connected to the input of the third logic and module 703, and the output of the third logic and module 703 and the output of the logic not module 702 are used together as the input of the first logic and module 704. The present embodiment is not limited.
Optionally, two input ends of the logic or module are respectively connected with output ends of the two first normally open contacts.
In this embodiment, two input ends of the logic or module are respectively connected with output ends of the two first normally open contacts, so that the logic or module outputs a second logic result to the first logic and module according to the first level signals output by the two first normally open contacts. More specifically, the two first normally open contacts are logically or connected, for example, as long as one of the two first level signals is high, the second logic result is a logic 1; when both first level signals are low, the second logic result is logic 0.
In the embodiment, the two input ends of the logic or module are respectively connected with the output ends of the two first normally open contacts, so that the stability of the alarm device of the cooler is improved.
Optionally, the power supply of the cooler includes a main power supply and a standby power supply, and the main power supply and the standby power supply are respectively connected with the input ends of the corresponding first normally open contacts.
In the alarm device of the cooler, a main power supply of the cooler is connected with a first normally open contact of the main power supply, and a standby power supply is connected with the first normally open contact of the standby power supply. When the main power supply is started, the first normally open contact of the main power supply is closed; when the standby power supply is started, the first normally open contact of the standby power supply is closed. The first normally open contact of the main power supply and the first normally open contact of the standby power supply are electrically locked and mechanically interlocked, that is, only one of the first normally open contact of the main power supply and the first normally open contact of the standby power supply is in a closed state at the same time.
The power supply of the cooler in this embodiment includes a main power supply and a standby power supply, which are respectively connected with the input ends of the corresponding first normally open contacts, so that the stability and accuracy of the alarm device of the cooler are improved.
Optionally, the alarm module is used for outputting an alarm signal when the first logic result indicates that the isolation switch is triggered by mistake to cause the cooler to stop working.
In this embodiment, the alarm module outputs an alarm signal when the first logic result indicates that the isolation switch is triggered by mistake to cause the cooler to stop working. One implementation manner is that when the first level signal output by the first normally open contact is high level (the power supply is normal), the second level signal output by the second normally open contact is low level (the states of the coolers are all abnormal), and the disconnecting link switching signal is logic 1 (the isolating disconnecting link is disconnected), the first logic result is logic 1. That is, the power supply state of the cooler is normal during the operation of the cooler, and at this time, if the cooler is completely stopped due to the erroneous touch of the isolating switch, the alarm module will send an alarm signal.
In this embodiment, the alarm module is used for outputting alarm signals when the first logic result indicates that the isolation switch is triggered by mistake to cause the cooler to stop working, so that operation and maintenance personnel can quickly identify and locate the fault, and the operation risk is reduced.
The embodiment also provides a transformer system, which comprises a transformer, a cooler connected with the transformer and an alarm device of any one of the above. Wherein the transformer system further comprises a distributed computer control system (Distributed Control System, DCS) to which the first level signal output by each element, e.g. the first normally open contact, is input.
Fig. 8 is a DCS schematic diagram of a medium alarm device of a transformer system. The first normally open contact can be used for multiplexing a KMS1 contactor and a KMS2 contactor in the prior art, and can also be used for multiplexing a KMS1 normally closed switch and a KMS1 normally open switch. The second normally open contact can multiplex the K126 normally open switch to the K131 normally open switch. The KMS1 contactor and the KMS2 contactor are logically or connected, and the logic or module 801 is configured to output a first level signal output according to the first normally open contact to the third logic and module 804. The normally open switches K126 to K131 are logically connected in series and are inverted after being connected. Specifically, logic or module 801 outputs a logic 1 when either the KMS1 contactor or KMS2 contactor is powered (i.e., the first normally open contact is closed). When the K126 normally open switch-K131 normally open switch is all open, the second logical and module 802 outputs a logical 0, the logical not module 803 outputs a logical 1, and the third logical and module 804 outputs a logical 1. The disconnecting link on-off state signal outputs logic 1 when the isolating disconnecting link is off, and outputs logic 0 when the isolating disconnecting link is on. Further, when any one of the KMS1 contactor or the KMS2 contactor is powered on, the K126 normally open switch-K131 normally open switch is all opened, and the isolation knife switch is off, the first logical and module 805 will output a logical 1 finally, so that the alarm module 806 can output an alarm signal and send an alarm.
Fig. 9 is a schematic diagram of an alarm screen of the transformer system. The transformer system can also comprise a display device, such as an industrial personal computer, and a monitoring panel picture of the industrial personal computer displays various alarm information, such as an excitation system power supply alarm, in the transformer system. With reference to fig. 8, if the cooler is completely stopped due to the false touching of the isolating switch, a main transformer cooler complete stop alarm is displayed, so that an operation and maintenance person can quickly identify the positioning problem.
FIG. 10 is a schematic circuit diagram of an optimized isolation switch auxiliary contact in the present application. Further, as shown in fig. 10, in this embodiment, a human intervention switch ST1 may be connected in series on the basis of fig. 1. When the isolating switch is in false touch, operation and maintenance personnel recognize the problem through alarming, and the power-on and power-off state of the transformer can be rapidly switched through the ST1 switch, so that the operation of the cooler is recovered.
The alarm device of the cooler provided by the embodiment realizes the total stop alarm of the cold zone device by carrying out logic configuration on each signal sent into the transformer system of the DCS. FIG. 11 is a schematic diagram of the logic configuration of the alarm device of the cooler of the present application. As shown in fig. 11, the alarm device of the cooler in the embodiment of the present application can multiplex elements and devices in the conventional art. Specifically, first, a KMS1 normally open switch and a KMS2 normally open switch (i.e., first normally open contacts) corresponding to a first power supply and a second power supply of the cooler are logically or-connected to the DCS. And secondly, carrying out logic series connection on the control switches K126 to K131 (namely second normally open contacts) of the coolers in each group on the DCS, and carrying out inverse logic operation after the logic series connection. And finally, outputting a first logic result after logically ANDed with the isolation switch DCS by the second logic result output by the first normally-open contact connected in OR relation, and the third logic result output by each second normally-open contact which is connected in series and inverted. When the first logic result is logic 1, the alarm module outputs an alarm signal, and the alarm signal is sent to a monitoring panel picture of the industrial personal computer so as to display the 'main transformer cooler total stop alarm'.
Therefore, operation and maintenance personnel can directly judge the fault without analysis, so that the fault pre-judging and searching time is greatly reduced, the problem of complete stop of the cooler is effectively solved, and the operation stability is improved. Furthermore, the embodiment does not need to add other equipment and circuits on the premise of ensuring that all original functions are unchanged, and can realize the original alarm function which cannot be realized by only carrying out logic configuration on signals sent into a transformer system again, so that the embodiment has low cost and strong practicability.
The various modules in the alarm device of the cooler described above may be implemented in whole or in part by software, hardware, and combinations thereof. The above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may call and execute operations corresponding to the above modules.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples illustrate only a few embodiments of the application and are described in detail herein without thereby limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of the application should be assessed as that of the appended claims.
Claims (10)
1. An alarm device of a cooler is characterized by comprising a logic OR module, a logic NOT module, a first logic AND module, a third logic AND module and an alarm module;
the two input ends of the logic OR module are respectively connected with the output ends of the two first normally open contacts and are used for acquiring first level signals output by the first normally open contacts connected with a power supply of the cooler; the first level signal output when the first normally open contact is closed is a high level signal; the first level signal output when the first normally open contact is opened is a low level signal;
the logic NOT module is used for acquiring a second level signal output by a second normally open contact connected with the cooler; the second level signal output when the second normally open contact is closed is a high level signal; the second level signal output when the second normally open contact is opened is a low level signal;
the second input end of the first logic AND module is connected with one end of an isolation disconnecting link, and is used for acquiring a disconnecting link switching state signal of the isolation disconnecting link, determining a first logic result according to the disconnecting link switching state signal, the first level signal and the second level signal, and outputting the first logic result to the alarm module so that the alarm module can determine to output an alarm signal according to the first logic result;
the two input ends of the third logical AND module are respectively connected with the output end of the logical OR module and the output end of the logical NOT module, the output end of the third logical AND module is connected with the first input end of the first logical AND module, and the output end of the first logical AND module is connected with the input end of the alarm module.
2. The alarm device of claim 1, wherein the logic or module is further configured to output a second logic result to the first logic and module according to the first level signal;
the logic NOT module is further used for outputting a third logic result to the first logic AND module according to the second level signal;
the first logic AND module is further configured to determine the first logic result according to the switch opening and closing state signal, the second logic result and the third logic result.
3. The alarm device of claim 2, wherein the number of the second normally open contacts is N, and the alarm device further comprises N-1 second logical and modules, each of the second logical and modules forming a serial logical and circuit, wherein N is an integer greater than 0;
the serial logic AND circuit is used for determining a fourth logic result according to the second level signals output by the N second normally open contacts and outputting the fourth logic result to the logic NOT module;
and the logic NOT module is used for performing NOT logic operation on the fourth logic result to obtain the third logic result, and outputting the third logic result to the first logic AND module.
4. The alarm device according to claim 3, wherein a first second logical AND module in the series logical AND circuit is connected to the two second normally open contacts, and is configured to obtain second level signals output by the two second normally open contacts, and determine a logical AND result according to the obtained second level signals;
the other second logic AND modules in the serial logic AND circuit are respectively connected with a corresponding second normally-open contact and are used for obtaining a second level signal output by the corresponding second normally-open contact;
and the other second logical AND modules in the serial logical AND circuit are used for acquiring the logical AND result output by the last second logical AND module and determining the logical AND result output by the second logical AND module according to the acquired second level signal and the logical AND result, wherein the fourth logical AND result is the logical AND result output by the N-1 second logical AND module.
5. The alarm device of claim 1, wherein the power supply of the cooler comprises a main power supply and a standby power supply, and the main power supply and the standby power supply are respectively connected with the input ends of the corresponding first normally open contacts.
6. The alarm device of claim 1, wherein the alarm module is configured to output the alarm signal when the first logic result indicates that the isolation knife is triggered by a mistake to cause the cooler to cease operation.
7. A transformer system comprising a transformer, a cooler connected to the transformer and an alarm device according to any one of claims 1-6.
8. The transformer system of claim 7, further comprising:
and the distributed computer control system is used for receiving the first level signal output by the first normally open contact.
9. The transformer system of claim 7, further comprising:
and the display equipment is used for displaying each alarm information in the transformer system.
10. The transformer system of claim 9, wherein the alarm information displayed by the display device is a main transformer chiller stop alarm if a chiller stop occurs due to a false touch of the isolation knife.
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| CN202210439438.4A CN114664064B (en) | 2022-04-25 | 2022-04-25 | Alarm device of cooler and transformer system |
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| CN202210439438.4A CN114664064B (en) | 2022-04-25 | 2022-04-25 | Alarm device of cooler and transformer system |
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| US20210118279A1 (en) * | 2019-10-22 | 2021-04-22 | Lifewhere, Llc | Current sensing device |
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