CN206759035U - Circuit and device for protection equipment - Google Patents
Circuit and device for protection equipment Download PDFInfo
- Publication number
- CN206759035U CN206759035U CN201720626128.8U CN201720626128U CN206759035U CN 206759035 U CN206759035 U CN 206759035U CN 201720626128 U CN201720626128 U CN 201720626128U CN 206759035 U CN206759035 U CN 206759035U
- Authority
- CN
- China
- Prior art keywords
- relay
- circuit
- equipment
- loop
- relays
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000001960 triggered effect Effects 0.000 claims abstract description 19
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 5
- 230000005611 electricity Effects 0.000 description 4
- 239000000446 fuel Substances 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model embodiment provides a kind of circuit and device for protection equipment, belongs to field of thermal power.The circuit includes：For the commands relays group being connected with power supply, including at least one first relay, closed for being triggered when control system detects equipment operation irregularity by the control system；And at least one second relay, the input circuit of at least one second relay obtains electric in the case where at least one first relay is triggered closure so that the output loop for being connected at least one second relay of the control loop of the equipment is closed so that the equipment is out of service.The device includes：Multiple power supplys；And the multiple above-mentioned circuits for protection equipment being connected respectively with the multiple power supply.Thereby, realize makes equipment out of service when detecting equipment operation irregularity.
Description
Technical field
Field of thermal power is the utility model is related to, more particularly to a kind of circuit and device for protection equipment.
Background technology
The large-sized boiler device systems such as thermal power plant are complicated, provided with sending air-introduced machine, fuel feed system, water supply system etc.
More set system or equipments, once the event for jeopardizing system safety operation must be reliably reliable by above-mentioned working substance supply system
Cut-out, ensure that equipment safety operation does not cause the accident expansion.In the fired power generating unit of routine, MFT action objects nearly 100,
MFT occurs under any circumstance all must reliably cut off these equipment.Large-sized boiler MFT (Main Fuel at this stage
Trip, referring to boiler main fuel trip protection) protection is more by the way of power failure tripping, typically using two-way protection power source by cutting
Rear Drive Protecting Circuit is changed, as shown in figure 1, Fig. 1 is the dead electricity that a typical direct current double loop power supply passes through diode switching
Trip(ping) circuit schematic diagram.There is can cause to protect all or part of mistake when the loop after power transfer device has broken string for this
It is dynamic, cause boiler extinguishment to influence equipment stable operation.
Utility model content
The purpose of the utility model embodiment is to provide a kind of circuit and device for protection equipment, and it may be implemented in
Make equipment out of service during detection device operation irregularity.
To achieve these goals, the one side of the utility model embodiment provides a kind of electricity for protection equipment
Road, the circuit include：For the commands relays group being connected with power supply, including at least one first relay, for controlling
System detectio is closed to during equipment operation irregularity by control system trigger；And at least one second relay, at least one
The input circuit of two relays obtains electric in the case where at least one first relay is triggered closure so that is connected to equipment
The output loop of at least one second relay of control loop is closed so that equipment is out of service.
Alternatively, the circuit also includes：Hand trip(ping) relay, the first output loop of hand trip(ping) relay with least
The input circuit connection of one the second relay, the second output loop of hand trip(ping) relay are connected with control system, and second
The closure Triggering Control System record of output loop is triggered the number of closure and the letter of time correlation with hand trip(ping) relay
Breath.
Alternatively, the circuit also includes：Latch-in relay and the 3rd relay, the normally opened contact of latch-in relay and
The series circuit of the normally-closed contact composition of 3rd relay is connected with the input circuit of at least one second relay.
Alternatively, at least one second relay includes being connected respectively to multiple outputs time of the different controlled terminals of equipment
Road.
Alternatively, at least one first relay includes three relays, and commands relays group also includes logic module, patrolled
The input for collecting module is connected with the output loop of three relays, output end and the input circuit of at least one second relay
Connection, the output loops of at least two relays of the logic module in three relays be triggered closure when trigger it is at least one
The input circuit of second relay obtains electric.
Additionally, the another aspect of the utility model embodiment provides a kind of device for protection equipment, the device
Including：Multiple power supplys；And the multiple above-mentioned circuits for protection equipment being connected respectively with multiple power supplys.
Alternatively, control system is distributed monitoring control system.
Alternatively, at least one second relay in multiple circuits is corresponding with the same controlled terminal of equipment more
Individual output loop is in parallel.
Pass through above-mentioned technical proposal, at least one first relay is associated with least one second relay, examining
At least one first relay closure is closed when measuring equipment operation irregularity, and then the input circuit of at least one relay obtains
Electricity, and then cause the output loop of at least one second relay closes make it that equipment is out of service.In this way, realize in equipment
Make equipment out of service during operation irregularity.
The further feature and advantage of the utility model embodiment will give in detail in subsequent specific embodiment part
Explanation.
Brief description of the drawings
Accompanying drawing is that the utility model embodiment is further understood for providing, and one of constitution instruction
Point, it is used to explain the utility model embodiment together with following embodiment, but do not form to the utility model
The limitation of embodiment.In the accompanying drawings：
Fig. 1 is the power failure tripping circuit theory figure that a direct current double loop power supply passes through diode switching；
Fig. 2 is the connection diagram of the circuit for protection equipment provided according to an embodiment of the present utility model；
Fig. 3 is the connection signal of the circuit for protection equipment provided according to another embodiment of the present utility model
Figure；
Fig. 4 is the connection signal of the circuit for protection equipment provided according to another embodiment of the present utility model
Figure；
Fig. 5 is " two from three " logic schematic diagram provided according to an embodiment of utility model；And
Fig. 6 is the structured flowchart of the device for protection equipment provided according to an embodiment of the present utility model.
Description of reference numerals
The relay input circuit of 1 first relay output loop 2 second
The latch-in relay normally opened contact of 3 the first output loop of hand trip(ping) relay 4
The relay output loop of 5 the 3rd relay normally closed contact 6 second
81st, 82,83 with the OR gate of door 9
11st, the power supply of 12,13 relay output loop 7
The DCS reset instructions of 16 self-sustaining contact 17
The latch-in relay input circuit of 20 logic module 51
52 latch-in relay output loops
53 power supplys switch the hand trip(ping) button of diode 54
55 MFT relays 3 take the latch-in relay group of 2 loop 56
58 exit relay groups
Embodiment
The embodiment of the utility model embodiment is described in detail below in conjunction with accompanying drawing.It should be understood that
It is specific embodiment described herein is merely to illustrate and explains the utility model embodiment, is not limited to this
Utility model embodiment.
A kind of circuit for protection equipment is provided according to the one side of the utility model embodiment.The circuit includes
Commands relays group and at least one second relay.Wherein, the commands relays group is connected with power supply, including at least one
One relay, for being closed when control system detects equipment operation irregularity by control system trigger.At least one second after
The input circuit of electrical equipment obtains electric in the case where at least one first relay is triggered closure so that is connected to the control of equipment
The output loop of at least one second relay in loop is closed so that equipment is out of service.Set in this way, realizing detecting
Make it that equipment is out of service in the case of standby operation irregularity.In addition, by make at least one first relay be triggered closure and
The output loop closure realization of at least one second relay makes equipment out of service, avoids in the prior art because power supply switches
False protection caused by broken string caused by the reasons such as loosening occurs for the loop after device；Solving use " power failure tripping " scheme makes
Obtain whole relay coils coil scaling loss and the equipment thereby resulted in caused by long-term live line work in normal course of operation
Tripping operation.
Fig. 2 is the connection diagram of the circuit for protection equipment provided according to an embodiment of the present utility model.
As shown in Fig. 2 the first relay output loop 1 connects the second relay input circuit 2.It is triggered closure in the first relay
In the case of, the second relay input circuit 2 must be electric via the first relay output loop 1, and then causes the defeated of the second relay
Go out circuit closed with out of service by the control loop equipment of equipment.In addition, the second relay can include connecting respectively
It is connected to multiple output loops of the different controlled terminals of equipment, you can multiple output loops including controlling distinct device.In addition,
In the embodiment, the circuit for protection equipment may also include multiple first relays and multiple second relays.Multiple
The output loop of one relay is in parallel, and the input circuit of multiple second relays is in parallel.Any relay in multiple first relays
Device is triggered, and to may be such that the input circuit of multiple second relays obtains electric with so that corresponding output loop is closed so as to set for closure
It is standby out of service.Wherein, the output loop of multiple second relays can connect the control loop of distinct device to control difference
Equipment.In addition, at least two the control loop of same equipment can be connected to control in the output loop of multiple second relays
Same equipment is made, in this way, protective loop uses redundant fashion, can effectively be reduced because loop problem causes protection according to dynamic machine
Rate.
According in embodiment of the present utility model, circuit may also include hand trip(ping) relay.Wherein hand trip(ping)
First output loop of relay is connected with the input circuit of at least one second relay, and the second of hand trip(ping) relay is defeated
Go out loop to be connected with control system.Triggering hand trip(ping) relay makes to go smoothly manually after staff judges abnormal conditions occur
The coil of dynamic tripping relay obtains electric and then hand trip(ping) relay the first output loop closure, and then the second relay is defeated
Go out circuit closed.Meanwhile hand trip(ping) relay the second output loop closure Triggering Control System record with hand trip(ping) after
Electrical equipment is triggered the number of closure and the information of time correlation.
Fig. 3 is the connection signal of the circuit for protection equipment provided according to another embodiment of the present utility model
Figure.As shown in figure 3, in addition to the first relay output loop 1 is connected with the second relay input circuit 2, hand trip(ping) relay
First output loop 3 is also connected with the second relay input circuit.In this way, dual mode controls the second relay so that pair sets
Standby protection is relatively reliable.
According in embodiment of the present utility model, the circuit for protection equipment may also include latch-in relay and
3rd relay.Wherein, the normally-closed contact of the normally opened contact of latch-in relay and the 3rd relay composition series circuit with
The input circuit connection of at least one second relay.Fig. 4 is used for according to what another embodiment of the present utility model provided
The connection diagram of the circuit of protection equipment.Touched as shown in figure 4, the relay of latch-in relay normally opened contact 3 and the 3rd is normally closed
The series connection of point 5, circuit and the first relay output loop 1, the first output loop of hand trip(ping) relay 3 after both series connection are simultaneously
Connection, circuit in parallel are connected to the second relay input circuit 2.In addition, in this embodiment, the input of latch-in relay
Loop can be with the output loop of at least one first relay and/or the first output loop of hand trip(ping) relay and at least
The input circuit connection of one the second relay, is triggered at least one first relay and/or hand trip(ping) relay
In the case of latch-in relay be triggered, and then cause at least one second relay input circuit obtain it is electric so that be connected to
The output loop of at least one second relay of the control loop of equipment is closed so that equipment is out of service.
According in embodiment of the present utility model, at least one first relay can include three relays, refer to
Make relay group also include logic module, the input of logic module is connected with the output loop of three relays, output end with
The input circuit connection of at least one second relay, the output of at least two relays of the logic module in three relays
Loop be triggered closure when trigger at least one second relay input circuit obtain it is electric.Wherein, in this embodiment, logic
Module can " two from three " logic judgment.Fig. 5 is " two from three " logic theory provided according to an embodiment of utility model
Figure.As shown in figure 5, logic module 20 includes and door 81 and door 82 and door 83 and OR gate 9.Relay output loop 11 connect with
Door 81 and be connected with door 82, relay output loop 12 with door 82 and be connected with door 83, relay output loop 13 and door 81 and
With door 83, OR gate 9 is all connected with door 81, with door 82, with door 83.In this way, relay output loop 11, relay output loop
12nd, in relay output loop 13 any two be triggered closure when, may be such that be connected with logic module 20 it is at least one
The input circuit of second relay obtains electric.
A kind of device of user's protection equipment is provided according to the another aspect of the utility model embodiment.The device includes
The circuit for protection equipment described in multiple power supplys and the above-mentioned embodiment being connected respectively with multiple power supplys.Wherein, control
System processed can use distributed monitoring control system.In addition, at least one second relay in multiple circuits is same with equipment
The corresponding multiple output loops of one controlled terminal are in parallel.
Fig. 6 is the structured flowchart of the device for protection equipment provided according to an embodiment of the present utility model.Such as
Shown in Fig. 6, use two power supplys as two circuit loop independences, two circuit loops be connected with the second relay input circuit with
Obtain it electric, and then the output loop of the second relay is closed so that by the control of connected control loop accordingly
Equipment it is out of service.In this embodiment, multiple latch-in relays and multiple second relays can be included.Self-sustaining
Relay input circuit 51 can include the coil of multiple latch-in relays.Accordingly, latch-in relay output loop 52
The normally opened contact of multiple latch-in relays can be included, the normally opened contact of the plurality of latch-in relay can correspond to difference respectively
The control loop of equipment.Also, multiple second relays are also corresponding with the control loop of distinct device.Correspond to oneself of same equipment
The normally opened contact of guard relay controls the triggering of corresponding second relay to control the operation of relevant device.In addition, manually
Relay output loop 3 can include two normally opened contacts to control the triggering of latch-in relay.
In summary, the input circuit of at least one second relay is triggered closure at least one first relay
In the case of it is electric so that be connected at least one second relay of the control loop of equipment output loop close so that equipment
It is out of service.Cause that equipment is out of service in the case where detecting equipment operation irregularity in this way, realizing.Will in the prior art
Power failure tripping be changed to avoid with electric tripping and break because the loop after power transfer device occurs to loosen etc. caused by reason
Cause false protection, solve and cause whole relay coils to be in band in normal course of operation by the way of power failure tripping
Electricity condition and caused by coil easy scaling loss the problem of, it also avoid therefore and caused by equipment component trip.Protective loop uses
Redundant fashion, effectively reduce because loop problem causes protection according to dynamic probability.Multiple power supplies are independently-powered, solve loop
To the ring and problem of dc source.
The optional embodiment of the utility model example is described in detail above in association with accompanying drawing, still, the utility model is implemented
Mode is not limited to the detail in above-mentioned embodiment, can in the range of the technology design of the utility model embodiment
To carry out a variety of simple variants to the technical scheme of the utility model embodiment, these simple variants belong to the utility model
The protection domain of embodiment.
It is further to note that each particular technique feature described in above-mentioned embodiment, in not lance
In the case of shield, it can be combined by any suitable means.In order to avoid unnecessary repetition, the utility model is implemented
Mode no longer separately illustrates to various combinations of possible ways.
In addition, it can also be combined between a variety of embodiments of the utility model embodiment, only
Wanting it, it should equally be considered as interior disclosed in the utility model embodiment without prejudice to the thought of the utility model embodiment
Hold.
Claims (8)
1. a kind of circuit for protection equipment, it is characterised in that the circuit includes：
For the commands relays group being connected with power supply, including at least one first relay, for being detected in control system
Triggered and close by the control system during equipment operation irregularity；And
At least one second relay, the input circuit of at least one second relay is at least one first relay
Device be triggered closure in the case of it is electric so that be connected at least one second relay of the control loop of the equipment
Output loop close so that the equipment is out of service.
2. circuit according to claim 1, it is characterised in that the circuit also includes：
Hand trip(ping) relay, the first output loop of the hand trip(ping) relay and at least one second relay
Input circuit is connected, and the second output loop of the hand trip(ping) relay is connected with the control system, second output
The number for closure that the closure triggering control system in loop records and the hand trip(ping) relay is triggered and time correlation
Information.
3. circuit according to claim 2, it is characterised in that the circuit also includes：
Latch-in relay and the 3rd relay, the normally opened contact of the latch-in relay and the 3rd relay it is normally closed
The series circuit of contact composition is connected with the input circuit of at least one second relay.
4. circuit according to claim 1, it is characterised in that at least one second relay includes being connected respectively to
Multiple output loops of the different controlled terminals of the equipment.
5. circuit as claimed in any of claims 1 to 4, it is characterised in that at least one first relay
Including three relays, the commands relays group also includes logic module, the input of the logic module with described three
The output loop connection of relay, output end are connected with the input circuit of at least one second relay, the logic mould
The output loop of at least two relays of the block in three relays be triggered closure when trigger described at least one the
The input circuit of two relays obtains electric.
6. a kind of device for protection equipment, it is characterised in that the device includes：
Multiple power supplys；And
What is be connected respectively with the multiple power supply multiple as claimed in any of claims 1 to 4 is used for protection equipment
Circuit.
7. device according to claim 6, it is characterised in that the control system is distributed monitoring control system.
8. device according to claim 6, it is characterised in that at least one second relay in the multiple circuit
The multiple output loops corresponding with the same controlled terminal of the equipment are in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720626128.8U CN206759035U (en) | 2017-06-01 | 2017-06-01 | Circuit and device for protection equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720626128.8U CN206759035U (en) | 2017-06-01 | 2017-06-01 | Circuit and device for protection equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206759035U true CN206759035U (en) | 2017-12-15 |
Family
ID=60621690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720626128.8U Active CN206759035U (en) | 2017-06-01 | 2017-06-01 | Circuit and device for protection equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206759035U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113267991A (en) * | 2021-04-13 | 2021-08-17 | 华能国际电力股份有限公司上海石洞口第一电厂 | Boiler MFT protection system and method thereof |
-
2017
- 2017-06-01 CN CN201720626128.8U patent/CN206759035U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113267991A (en) * | 2021-04-13 | 2021-08-17 | 华能国际电力股份有限公司上海石洞口第一电厂 | Boiler MFT protection system and method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2850708B1 (en) | Method and apparatus for localizing and quenching an arc | |
| KR20120089751A (en) | Device and method to break the current of a power transmission or distribution line and current limiting arrangement | |
| CN107234969B (en) | Electric car and its high pressure protector | |
| CN108565974A (en) | One kind being based on the self-powered long-range failure protection method and system of protective device | |
| CN102299563A (en) | Digital-analog (DA) protection method for intelligent distribution network | |
| CN103746349A (en) | Circuit breaker failure protection mechanism of transformer substation and optimal configuration method for circuit breaker protection | |
| CN206759035U (en) | Circuit and device for protection equipment | |
| CN201829929U (en) | Novel hard trip loop for large-scale thermal power unit MFT (main fuel trip) | |
| CN106329499A (en) | DC grounding protection method for single-rail backflow power supply system | |
| TWI740940B (en) | Fault current limiter and method thereof | |
| CN106711970A (en) | Closing failure protection method for unified power flow controller provided with series transformer | |
| CN205407404U (en) | A an equipment and a system of change group for sending out switching of power of change group | |
| CN207339250U (en) | Transformer non-exciting regulation switch protecting circuit | |
| CN104348133B (en) | Reactor protection system internal electric source interlocking controller | |
| CN108493911B (en) | Pressure ring network protection method in a kind of magnetic floating traffic | |
| CN206158915U (en) | A lose electronic type no. 3 of doing and select two guard signal circuit for protecting hydraulic generator | |
| CN205791495U (en) | The protection of controller switching equipment intelligent switch-on controls device | |
| CN205992731U (en) | A kind of arc light protecting system with selectivity trip avoidance function | |
| CN204947581U (en) | A kind of station service cuts decision logic circuit soon | |
| CN106410741A (en) | Self-power transmission device of universal circuit breaker | |
| CN203151213U (en) | Converter station valve water cooling system signal power source | |
| CN213421160U (en) | Control loop for FSSS system | |
| CN204068206U (en) | The control device of steam turbine jumped by a kind of generator connection | |
| CN107910949A (en) | One kind is stopped in emergency circuit and its implementation | |
| CN202997534U (en) | Intelligent device and system for removing line faults of overhead contact line system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |