CN107612031A - Cogeneration grid-connected system - Google Patents
Cogeneration grid-connected system Download PDFInfo
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- CN107612031A CN107612031A CN201710922637.XA CN201710922637A CN107612031A CN 107612031 A CN107612031 A CN 107612031A CN 201710922637 A CN201710922637 A CN 201710922637A CN 107612031 A CN107612031 A CN 107612031A
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- 230000008901 benefit Effects 0.000 abstract description 5
- 239000002918 waste heat Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 230000010354 integration Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The invention discloses a kind of cogeneration grid-connected system, including afterheat generating system, total drop power station, grid-connected mother section, described afterheat generating system connects grid-connected mother section through current limiting switch cabinet, described grid-connected mother section includes bus PT cabinets 1YH, access cabinet 52F, outgoing line cabinet 52F2, outgoing line cabinet 52F1, described current limiting cabinet output end is connected with access cabinet, the output of the access cabinet connects bus PT cabinets respectively, outgoing line cabinet 52F1, outgoing line cabinet 52F2, the bus 1 in power station always drops through switch cubicle 52F4 connections in described outgoing line cabinet 52F1, the bus 2 in power station always drops through switch cubicle 52F3 connections in described outgoing line cabinet 52F2.The advantage of the invention is that：The complexity of wiring when system can reduce grid-connected in total drop; afterheat generating system and the stability always dropped are improved, the interlocking between switch cubicle is set, improves power quality; unit safety stable operation is ensure that, is that follow-up multiple power sources are grid-connected and interlock protection is offered reference；Realize the reliability of supply network, security, economical.
Description
Technical field
The present invention relates to afterheat generating system field, more particularly to cogeneration grid-connected system and its interlocking.
Background technology
In clinker production process, kiln hood chamotte cooler and kiln tail preheater will produce the simultaneously outer substantial amounts of waste gas of row
(EGT is at 330~390 DEG C or so), for fully recovery waste gas in waste heat, reduce the influence to environment, meanwhile, also for
By cogeneration, saving energy, lowering energy consumption and reducing pollutants discharge and consumption reduction are realized, alleviates the pressure of factory's supply of electric power, is produced by clinker
In cogeneration, can not only realize energy-saving and emission-reduction, can also reduce production cost to greatest extent, improve the competition of product
Power, the economic benefit, social benefit and environmental benefit of project are realized comprehensively.
The electricity that afterheat generating system sends recovery waste heat needs grid integration to total drop, to ensure whole electric power system
Stability, improve power quality, overcome former total drop main electrical scheme complicated, cogeneration can not in the usual way grid-connected problem, it is necessary to
Redesign the grid-connected mode of connection.And in order to ensure unit safety stable operation, it is grid-connected in interlocking problem should also be as together
Consider, therefore, it is necessary to design a kind of cement afterheat generation grid-connected system regarding to the issue above.
The content of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of cogeneration grid-connected system, the system energy
The complexity of wiring when enough reducing grid-connected in total drop, improves afterheat generating system and the stability always dropped, improves power quality.
To achieve these goals, the technical solution adopted by the present invention is：A kind of cogeneration grid-connected system, including waste heat
Electricity generation system, power station, grid-connected mother section always drop, described afterheat generating system connects grid-connected mother section, institute through current limiting switch cabinet
The grid-connected mother section stated includes bus PT cabinets 1YH, access cabinet 52F, outgoing line cabinet 52F2, outgoing line cabinet 52F1, and described current limiting cabinet is defeated
Go out end to be connected with access cabinet, the output for accessing cabinet connects bus PT cabinets, outgoing line cabinet 52F1, outgoing line cabinet 52F2 respectively, described
Outgoing line cabinet 52F1 through switch cubicle 52F4 connections always drop power station bus 1, described outgoing line cabinet 52F2 is through switch cubicle 52F3 connections
The bus 2 in total drop power station.
Bus 1 is connected by switch cubicle QF14 with 1# transformers, and bus 2 is connected by switch cubicle QF15 with 2# transformers,
Bus 1 is through switch cubicle QF18 connections bus 3, and bus 3 is connected through switch cubicle QF16 with bus 2, and bus 3 is through switch cubicle QF17 and 3#
Transformer connects.
Described switch cubicle 52F4 and switch cubicle QF14, switch cubicle QF17, switch cubicle QF18, switch cubicle 52F3 interlockings are set
Put.
When meeting switch cubicle QF14 combined floodgates, switch cubicle QF18 separating brakes, switch cubicle 52F3 separating brakes or meet switch cubicle
When QF14 separating brakes, switch cubicle QF17 close a floodgate, switch cubicle QF18 closes a floodgate, switch cubicle 52F4 could close a floodgate.
The shutting-brake control loop of switch cubicle 52F4 inner breakers in closing switch, closing coil, switch cubicle 52F3 including breaking
Road device normally-closed contact K1, switch cubicle QF14 inner breaker normally opened contacts K2, normally-closed contact K3, switch cubicle QF17 inner breakers are normally opened
Contact K4, switch cubicle QF18 inner breaker normally-closed contacts K5, normally opened contact K6 ,+KM connect through closing switch, closing coil successively
Normally-closed contact K1, normally-closed contact K1 connect normally-closed contact K3, normally opened contact K2 respectively, and normally opened contact K2 connects through normally-closed contact K5
- KM is met, normally-closed contact K3 passes through normally opened contact K4, normally opened contact K6 connections-KM successively.
Meeting switch cubicle QF15 combined floodgates, switch cubicle QF16 separating brakes and 52F4 separating brakes or switch cubicle QF15 separating brakes, switch
When cabinet QF16 combined floodgates, switch cubicle QF17 combined floodgates and 52F4 separating brakes, switch cubicle 52F3 could close a floodgate.
The closing circuit of switch cubicle 52F3 inner breakers includes switch cubicle QF15 inner breaker normally opened contacts K7, normally-closed contact
K8, switch cubicle QF16 inner breaker normally opened contacts K9, normally-closed contact K10, switch cubicle QF17 inner breaker normally opened contacts K4, switch
Cabinet 52F4 inner breaker normally-closed contacts K11 ,+KM connect normally-closed contact K11, normally-closed contact K11 after closing switch, closing coil
Connect normally opened contact K7 respectively, normally-closed contact K8, normally opened contact K7 are passed through successively through normally opened contact K10 connection-KM, normally-closed contact K8
Normally opened contact K9, normally opened contact K4 connections-KM.
When meeting switch cubicle 52F3 combined floodgates and 52F1 separating brakes, switch cubicle 52F2 could close a floodgate；Break in switch cubicle 52F2
It is normally closed that the closing circuit of road device includes closing switch, closing coil, 52F3 inner breaker normally opened contact K12,52F1 inner breakers
Contact K13 ,+KM connection-KM after closing switch, closing coil, normally opened contact K12, normally-closed contact K13.
When meeting switch cubicle 52F4 combined floodgates and switch cubicle 52F2 separating brakes, 52F1 could close a floodgate；Wherein 52F1 closing circuits
Including closing switch, closing coil, switch cubicle 52F4 inner breaker normally opened contacts K14, switch cubicle 52F2 inner breakers it is normally closed
Contact K15 ,+the KM connection-KM after closing switch, closing coil, normally opened contact K14, normally-closed contact K15 successively.
Meeting that 52F1 closes a floodgate or 52F2 closes a floodgate one of them, 52F could close a floodgate；The closing circuit of 52F inner breakers
Including normally opened contact K17 ,+KM in closing switch, closing coil, 52F1 inner breaker normally opened contacts K16,52F2 successively through closing a floodgate
Connection-KM after switch, closing coil, normally opened contact K16, normally opened contact K17 are connected in parallel on normally opened contact K16 both ends.
Described afterheat generating system includes grid-connected bus, grid-connection cabinet 52G, switch cubicle 52H, switch cubicle 52P, switch cubicle
52S, cogeneration station, cogeneration station are connected by switch cubicle 52S with switch cubicle 52G, the grid-connected bus of switch cubicle 52G connections,
Grid-connected bus is through 52H connection house transformers, and grid-connected bus is through 52P connection current limiting switch cabinets.
When meeting that switch cubicle 52F closes a floodgate and current limiting switch cabinet closes a floodgate, switch cubicle 52P could closing operation；It is disconnected in 52F
Road device closing circuit includes closing switch, closing coil, the normally opened contact K18 of 52F inner breakers, current limiting switch cabinet inner breaker
Normally opened contact K19 ,+KM be connected after the closing switch, closing coil of 52F inner breakers with normally opened contact K18, normally opened contact
K18 is through normally opened contact K19 connections-KM.
When switch cubicle 52P closes a floodgate, switch cubicle 52S closes a floodgate, switch cubicle 52H combined floodgates three meets simultaneously, switch cubicle 52G is
It can close a floodgate；Closing circuit of circuit breaker in switch cubicle 52G is included in the closing switch, closing coil, switch cubicle 52P of the breaker
The normally opened contact K20 of breaker, switch cubicle 52S inner breaker normally opened contacts K21,52H inner breakers is normally opened in switch cubicle
Contact K22 ,+KM connect after closing switch, closing coil, normally opened contact K20, normally opened contact K21, normally opened contact K22 successively
Meet-KM.
The advantage of the invention is that：The complexity of wiring when system can reduce grid-connected in total drop, improves cogeneration
System and the stability always dropped, set the interlocking between switch cubicle, improve power quality, it is ensured that unit safety stable operation,
It is grid-connected and interlock protection is offered reference for follow-up multiple power sources；Realize the reliability of supply network, security, economical.
Brief description of the drawings
Mark in the content and figure expressed below each width accompanying drawing of description of the invention is briefly described：
Fig. 1 is grid-connected system elementary diagram of the present invention；
Fig. 2 is the grid-connected mother segment structure schematic diagram of the present invention；
Fig. 3 is switch cubicle 52F4 interlock logic figures of the present invention；
Fig. 4 is switch cubicle 52F4 locking principle figures of the present invention；
Fig. 5 is switch cubicle 52F3 interlock logic figures of the present invention；
Fig. 6 is switch cubicle 52F3 locking principle figures of the present invention；
Fig. 7 is switch cubicle 52F2 interlock logic figures of the present invention；
Fig. 8 is switch cubicle 52F2 locking principle figures of the present invention；
Fig. 9 is switch cubicle 52F1 interlock logic figures of the present invention；
Figure 10 is switch cubicle 52F1 locking principle figures of the present invention；
Figure 11 is switch cubicle 52F interlock logic figures of the present invention；
Figure 12 is switch cubicle 52F schematic diagrams of the present invention；
Figure 13 is 52P locking principles figure of the present invention；
Figure 14 is switch cubicle 52G locking principle figures of the present invention.
Embodiment
It is further detailed to the embodiment work of the present invention by the description to optimum embodiment below against accompanying drawing
Thin explanation.
As shown in Figure 1, 2, total drop includes three main transformers in cogeneration factory, divides into two sections of 6kV buses, wherein 3#
Main transformer is standby.15MW cogeneration units want two sections of 6kV buses under three main transformers of grid integration, and design is considered as
Ad hoc cogeneration mother section is always dropping, and cogeneration is sent to total drop from T/G factory buildings and first passes through current limiting switch cabinet IS-LIMITER
Cogeneration mother section is accessed, if access cabinet, when, bus PT cabinets, outgoing line cabinet two sides is respectively connected to always drop two sections of mothers 6kV
Line.Public grid-connected bus is designed, two-way grid-connection cabinet is realized grid-connected with always two sections of buses of drop.
Specific parallel network circuit includes：Afterheat generating system, power station, grid-connected mother section always drop, afterheat generating system is through current limliting
Switch cubicle connects grid-connected mother section, and grid-connected mother section includes bus PT cabinets 1YH, access cabinet 52F, outgoing line cabinet 52F2, outgoing line cabinet
52F1, current limiting cabinet IS-LIMITER output ends are connected with access cabinet, and access cabinet 52F output connects bus PT cabinets, outlet respectively
The bus 1 in power station always drops through switch cubicle 52F4 connections in cabinet 52F1, outgoing line cabinet 52F2, outgoing line cabinet 52F1, and outgoing line cabinet 52F2 is through switch
The bus 2 in power station always drops in cabinet 52F3 connections.
Bus 1 is connected by switch cubicle QF14 with 1# transformers, and bus 2 is connected by switch cubicle QF15 with 2# transformers,
Bus 1 is through switch cubicle QF18 connections bus 3, and bus 3 is connected through switch cubicle QF16 with bus 2, and bus 3 is through switch cubicle QF17 and 3#
Transformer connects.
Afterheat generating system includes grid-connected bus, grid-connection cabinet 52G, switch cubicle 52H, switch cubicle 52P, switch cubicle 52S, waste heat
Power station, cogeneration station are connected by switch cubicle 52S with switch cubicle 52G, the grid-connected bus of switch cubicle 52G connections, grid-connected bus
Through 52H connection house transformers, grid-connected bus is through 52P connection current limiting switch cabinets.
Chain logical relation is complicated after three main transformers, two sections of bus access cogenerations, except the two of normal operation to be considered
Platform main transformer, it is contemplated that 3# spare transformers ensure chain safe and reliable in the case of putting into operation, generator component two is returned
Need well to design the interlock connection of its switch cubicle while road is grid-connected, it is ensured that unit safety stable operation.
As shown in Figure 3, Figure 4, switch cubicle 52F4 and switch cubicle QF14, switch cubicle QF17, switch cubicle QF18, switch cubicle 52F3
Interlocking is set.When meeting switch cubicle QF14 combined floodgates, switch cubicle QF18 separating brakes, switch cubicle 52F3 separating brakes or meet switch cubicle
When QF14 separating brakes, switch cubicle QF17 close a floodgate, switch cubicle QF18 closes a floodgate, switch cubicle 52F4 could close a floodgate.
The shutting-brake control loop of switch cubicle 52F4 inner breakers in closing switch, closing coil, switch cubicle 52F3 including breaking
Road device normally-closed contact K1, switch cubicle QF14 inner breaker normally opened contacts K2, normally-closed contact K3, switch cubicle QF17 inner breakers are normally opened
Contact K4, switch cubicle QF18 inner breaker normally-closed contacts K5, normally opened contact K6 ,+KM connect through closing switch, closing coil successively
Normally-closed contact K1, normally-closed contact K1 connect normally-closed contact K3, normally opened contact K2 respectively, and normally opened contact K2 connects through normally-closed contact K5
- KM is met, normally-closed contact K3 passes through normally opened contact K4, normally opened contact K6 connections-KM successively.When switch cubicle 52F4 inner breakers close a floodgate
When, it is necessary to it is corresponding it is corresponding with it is interlocked other switch cubicles action caused by auxiliary contact closure open realize close
The energization in lock loop, so as to realize that closing coil is powered, then 52F4 could close a floodgate completion.
As shown in Figure 5,6, switch cubicle QF15 combined floodgates, switch cubicle QF16 separating brakes and 52F4 separating brakes or switch cubicle are being met
When QF15 separating brakes, switch cubicle QF16 combined floodgates, switch cubicle QF17 combined floodgates and 52F4 separating brakes, switch cubicle 52F3 could close a floodgate.
The closing circuit of switch cubicle 52F3 inner breakers includes switch cubicle QF15 inner breaker normally opened contacts K7, normally-closed contact
K8, switch cubicle QF16 inner breaker normally opened contacts K9, normally-closed contact K10, switch cubicle QF17 inner breaker normally opened contacts K4, switch
Cabinet 52F4 inner breaker normally-closed contacts K11 ,+KM connect normally-closed contact K11, normally-closed contact K11 after closing switch, closing coil
Connect normally opened contact K7 respectively, normally-closed contact K8, normally opened contact K7 are passed through successively through normally opened contact K10 connection-KM, normally-closed contact K8
Normally opened contact K9, normally opened contact K4 connections-KM.
Normally opened contact K11 closure and normally opened contact K7 closure, normally-closed contact K10 closure when or normally opened contact K11 closure,
When normally-closed contact K8 is closed and normally opened contact K9 closures, normally opened contact K4 are closed, now closing switch closure just can return combined floodgate
Road forms electrical circuit, and combined floodgate could act completion.It is respectively now that switch cubicle QF15 is closed a floodgate, opened corresponding to auxiliary contacts of circuit breaker
Pass cabinet QF16 separating brakes and 52F4 separating brakes or switch cubicle QF15 separating brakes, switch cubicle QF16 combined floodgates, switch cubicle QF17 combined floodgates and 52F4
Separating brake.Because the combined floodgate sub-switching operation of switch cubicle has control of main circuit breaker, the auxiliary contact of the breaker of each switch cubicle are joined
Lock, which is arranged in the closing circuit of other breaker of switch cabinet, will form electric interlock, so as to ensure the peace of switch cubicle unlatching
Entirely.
As shown in Figure 7,8, when meeting switch cubicle 52F3 combined floodgates and 52F1 separating brakes, switch cubicle 52F2 could close a floodgate；Opening
Closing the closing circuit of cabinet 52F2 inner breakers includes closing switch, closing coil, 52F3 inner breaker normally opened contacts K12,52F1
Inner breaker normally-closed contact K13 ,+KM connection-KM after closing switch, closing coil, normally opened contact K12, normally-closed contact K13.
52F2 combined floodgate closes needs in 52F3 combined floodgates and 52F1 separating brakes, now the normally opened contact K12 closures of 52F3 inner breakers, 52F
The normally-closed contact K13 of inner breaker is also closed, and now closing switch closes, and 52F2 inner breakers closing circuit could form electricity and return
Road, so as to close a floodgate, electric loop otherwise can not be formed, can not be closed a floodgate.
As shown in Fig. 9,10, when meeting switch cubicle 52F4 combined floodgates and switch cubicle 52F2 separating brakes, 52F1 could close a floodgate；Wherein
52F1 closing circuits are including in closing switch, closing coil, switch cubicle 52F4 inner breaker normally opened contacts K14, switch cubicle 52F2
The normally-closed contact K15 ,+KM of breaker successively after closing switch, closing coil, normally opened contact K14, normally-closed contact K15 connection-
KM.Switch cubicle 52F4 inner breaker normally opened contacts K14, the normally-closed contact K15 of switch cubicle 52F2 inner breakers are arranged in series in
In the closing circuit of 52F1 breaker, only when K15, K15 are closed, that is, switch cubicle 52F4 closes a floodgate and switch cubicle
During 52F2 separating brakes, now closing switch closure can just make switch cubicle 52F1 closing circuit of circuit breaker form electrical circuit, complete to close
Lock operates.
As shown in Figure 11,12, meeting that 52F1 closes a floodgate or 52F2 closes a floodgate one of them, 52F could close a floodgate；Break in 52F
The closing circuit of road device includes normally opened contact in closing switch, closing coil, 52F1 inner breaker normally opened contacts K16,52F2
Connection-KM after closing switch, closing coil, normally opened contact K16, normally opened contact K17 are connected in parallel on normally opened touch successively by K17 ,+KM
Point K16 both ends.In any closure of normally opened contact K16 or K17, the closing switch of operation 52F inner breakers can make closing circuit
Electrical circuit is formed, now meets that 52F1 inner breakers close a floodgate or 52F2 inner breakers close a floodgate.
When meeting that switch cubicle 52F closes a floodgate and current limiting switch cabinet closes a floodgate, switch cubicle 52P could closing operation；It is disconnected in 52F
Road device closing circuit includes closing switch, closing coil, the normally opened contact K18 of 52F inner breakers, current limiting switch cabinet inner breaker
Normally opened contact K19 ,+KM be connected after the closing switch, closing coil of 52F inner breakers with normally opened contact K18, normally opened contact
K18 is through normally opened contact K19 connections-KM.
When switch cubicle 52P closes a floodgate, switch cubicle 52S closes a floodgate, switch cubicle 52H combined floodgates three meets simultaneously, switch cubicle 52G is
It can close a floodgate；Closing circuit of circuit breaker in switch cubicle 52G is included in the closing switch, closing coil, switch cubicle 52P of the breaker
The normally opened contact K20 of breaker, switch cubicle 52S inner breaker normally opened contacts K21,52H inner breakers is normally opened in switch cubicle
Contact K22 ,+KM connect after closing switch, closing coil, normally opened contact K20, normally opened contact K21, normally opened contact K22 successively
Meet-KM.
The interlock logic and implementation of the switch cubicle in grid-connected system are described above, by disconnected in switch cubicle
The auxiliary contact of road device realize interlocking, ensure that the security of the closing operation of switch cubicle so that whole grid-connected system can be with
Safely and steadily run.
Obviously present invention specific implementation is not subject to the restrictions described above, as long as employing the methodology and skill of the present invention
The improvement for the various unsubstantialities that art scheme is carried out, within protection scope of the present invention.
Claims (10)
1. a kind of cogeneration grid-connected system, including afterheat generating system, power station always drops, it is characterised in that：Also include grid-connected mother
Join section, described afterheat generating system connects grid-connected mother section through current limiting switch cabinet, and described grid-connected mother section includes bus PT
Cabinet 1YH, access cabinet 52F, outgoing line cabinet 52F2, outgoing line cabinet 52F1, described current limiting cabinet output end are connected with access cabinet, the access
The output of cabinet connects bus PT cabinets, outgoing line cabinet 52F1, outgoing line cabinet 52F2, described outgoing line cabinet 52F1 through switch cubicle 52F4 companies respectively
The bus 1 in total drop power station is connect, the bus 2 in power station always drops through switch cubicle 52F3 connections in described outgoing line cabinet 52F2.
A kind of 2. cogeneration grid-connected system as claimed in claim 1, it is characterised in that：Bus 1 by switch cubicle QF14 with
1# transformers are connected, and bus 2 is connected by switch cubicle QF15 with 2# transformers, and bus 1 is female through switch cubicle QF18 connections bus 3
Line 3 is connected through switch cubicle QF16 with bus 2, and bus 3 is connected through switch cubicle QF17 with 3# transformers.
A kind of 3. cogeneration grid-connected system as claimed in claim 2, it is characterised in that：Described switch cubicle 52F4 and switch
Cabinet QF14, switch cubicle QF17, switch cubicle QF18, switch cubicle 52F3 interlockings are set.
A kind of 4. cogeneration grid-connected system as claimed in claim 3, it is characterised in that：Meet switch cubicle QF14 close a floodgate,
When switch cubicle QF18 separating brakes, switch cubicle 52F3 separating brakes or meet switch cubicle QF14 separating brakes, switch cubicle QF17 close a floodgate, switch cubicle
When QF18 closes a floodgate, switch cubicle 52F4 could close a floodgate.
A kind of 5. cogeneration grid-connected system as described in claim 1 or 2 or 3, it is characterised in that：It is breaking in switch cubicle 52F4
The shutting-brake control loop of device includes closing switch, closing coil, switch cubicle 52F3 inner breaker normally-closed contacts K1, switch cubicle QF14
Inner breaker normally opened contact K2, normally-closed contact K3, switch cubicle QF17 inner breaker normally opened contacts K4, switch cubicle QF18 inner breakers
Normally-closed contact K5, normally opened contact K6 ,+KM connect normally-closed contact K1, normally-closed contact K1 difference through closing switch, closing coil successively
Normally-closed contact K3, normally opened contact K2, normally opened contact K2 are connected through normally-closed contact K5 connection-KM, normally-closed contact K3 successively by normal
Open contact K4, normally opened contact K6 connections-KM.
A kind of 6. cogeneration grid-connected system as described in claim 1 or 2 or 3, it is characterised in that：Meeting switch cubicle QF15
Close a floodgate, switch cubicle QF16 separating brakes and 52F4 separating brakes or switch cubicle QF15 separating brakes, switch cubicle QF16 combined floodgates, switch cubicle QF17 close a floodgate
And during 52F4 separating brakes, switch cubicle 52F3 could close a floodgate.
A kind of 7. cogeneration grid-connected system as claimed in claim 6, it is characterised in that：The conjunction of switch cubicle 52F3 inner breakers
Lock loop includes switch cubicle QF15 inner breaker normally opened contacts K7, normally-closed contact K8, switch cubicle QF16 inner breaker normally opened contacts
K9, normally-closed contact K10, switch cubicle QF17 inner breaker normally opened contacts K4, switch cubicle 52F4 inner breaker normally-closed contacts K11 ,+KM
Normally-closed contact K11 is connected after closing switch, closing coil, normally-closed contact K11 connects normally opened contact K7, normally-closed contact respectively
K8, normally opened contact K7 through normally opened contact K10 connection-KM, normally-closed contact K8 successively through normally opened contact K9, normally opened contact K4 connections-
KM。
A kind of 8. cogeneration grid-connected system as described in claim 1 or 2 or 3, it is characterised in that：Meeting switch cubicle 52F3
When combined floodgate and 52F1 separating brakes, switch cubicle 52F2 could close a floodgate；Opened in the closing circuit of switch cubicle 52F2 inner breakers including combined floodgate
Pass, closing coil, 52F3 inner breaker normally opened contact K12,52F1 inner breaker normally-closed contact K13 ,+KM are through closing switch, conjunction
Connection-KM after brake cable circle, normally opened contact K12, normally-closed contact K13.
A kind of 9. cogeneration grid-connected system as claimed in claim 1, it is characterised in that：Meet switch cubicle 52F4 close a floodgate and
During switch cubicle 52F2 separating brakes, 52F1 could close a floodgate；Wherein 52F1 closing circuits include closing switch, closing coil, switch cubicle
52F4 inner breaker normally opened contacts K14, the normally-closed contact K15 ,+KM of switch cubicle 52F2 inner breakers are successively through closing switch, conjunction
Connection-KM after brake cable circle, normally opened contact K14, normally-closed contact K15.
A kind of 10. cogeneration grid-connected system as claimed in claim 1, it is characterised in that：Meet 52F1 close a floodgate or
52F2 closes a floodgate one of them, and 52F could close a floodgate；The closing circuit of 52F inner breakers includes closing switch, closing coil, 52F1
Normally opened contact K17 ,+KM are successively through closing switch, closing coil, normally opened contact K16 in inner breaker normally opened contact K16,52F2
Connection-KM afterwards, normally opened contact K17 are connected in parallel on normally opened contact K16 both ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710922637.XA CN107612031B (en) | 2017-09-30 | 2017-09-30 | Waste heat power generation grid-connected system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710922637.XA CN107612031B (en) | 2017-09-30 | 2017-09-30 | Waste heat power generation grid-connected system |
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| Publication Number | Publication Date |
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| CN107612031A true CN107612031A (en) | 2018-01-19 |
| CN107612031B CN107612031B (en) | 2024-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710922637.XA Active CN107612031B (en) | 2017-09-30 | 2017-09-30 | Waste heat power generation grid-connected system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110896222A (en) * | 2018-09-13 | 2020-03-20 | 中国石化工程建设有限公司 | Reactive compensation method of asynchronous generator |
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