CN107612031B - Waste heat power generation grid-connected system - Google Patents
Waste heat power generation grid-connected system Download PDFInfo
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- CN107612031B CN107612031B CN201710922637.XA CN201710922637A CN107612031B CN 107612031 B CN107612031 B CN 107612031B CN 201710922637 A CN201710922637 A CN 201710922637A CN 107612031 B CN107612031 B CN 107612031B
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- 239000002918 waste heat Substances 0.000 title claims abstract description 40
- 238000010248 power generation Methods 0.000 title claims abstract description 31
- 230000009467 reduction Effects 0.000 claims abstract description 11
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 14
- 230000020169 heat generation Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002912 waste gas Substances 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 230000000875 corresponding effect Effects 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The invention discloses a waste heat power generation grid-connected system, which comprises a waste heat power generation system, a total power reduction station and a grid-connected bus-connected section, wherein the waste heat power generation system is connected with the grid-connected bus-connected section through a current limiting switch cabinet, the grid-connected bus-connected section comprises a bus PT cabinet 1YH, an access cabinet 52F, an outgoing line cabinet 52F2 and an outgoing line cabinet 52F1, the output end of the current limiting cabinet is connected with the access cabinet, the output of the access cabinet is respectively connected with a bus PT cabinet, the outgoing line cabinet 52F1 and the outgoing line cabinet 52F2, the outgoing line cabinet 52F1 is connected with the bus 1 of the total power reduction station through a switch cabinet 52F4, and the outgoing line cabinet 52F2 is connected with the bus 2 of the total power reduction station through a switch cabinet 52F 3. The invention has the advantages that: the system can reduce the complexity of wiring in total drop during grid connection, improve the stability of a waste heat power generation system and the total drop, set the interlocking between the switch cabinets, improve the power quality, ensure the safe and stable operation of the unit and provide reference for the subsequent grid connection and interlocking protection of various power supplies; the reliability, the safety and the economy of the power supply network are realized.
Description
Technical Field
The invention relates to the field of waste heat power generation systems, in particular to a waste heat power generation grid-connected system and interlocking thereof.
Background
In the cement clinker production process, the kiln head clinker cooler and the kiln tail preheater generate and discharge a large amount of waste gas (the temperature of the waste gas is about 330-390 ℃), so that the waste heat in the waste gas is fully recovered, the influence on the environment is reduced, meanwhile, the energy conservation, the consumption reduction, the emission reduction and the consumption reduction are realized for generating power through the waste heat, the shortage condition of power supply of a factory is relieved, the energy conservation and the emission reduction can be realized through the waste heat power generation in the clinker production, the production cost can be reduced to the greatest extent, the competitiveness of the product is improved, and the economic benefit, the social benefit and the environmental benefit of the project are comprehensively realized.
The waste heat power generation system connects the power generated by the recovered waste heat to the total drop in a grid connection mode, so that the stability of the whole power supply system is ensured, the power quality is improved, the problems that the primary drop is complicated in wiring and the waste heat power generation cannot be connected in a grid connection mode in a conventional mode are solved, and the grid connection mode needs to be redesigned. In order to ensure safe and stable operation of the unit, the interlocking problem in grid connection should be considered together, so that a cement waste heat power generation grid connection system is necessary to be designed according to the problem.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a waste heat power generation grid-connected system, which can reduce the complexity of wiring in total drop during grid connection, improve the stability of the waste heat power generation system and the total drop and improve the power quality.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: the utility model provides a waste heat power generation grid-connected system, includes waste heat power generation system, total power station, the female section that allies oneself with that is incorporated into the power networks, waste heat power generation system connect the female section that allies oneself with that is incorporated into the power networks through current limiting switch cabinet, the female section that allies oneself with that is incorporated into the power networks include busbar PT cabinet 1YH, access cabinet 52F, be qualified for the next round of competitions cabinet 52F2, be qualified for the next round of competitions cabinet 52F1, be connected with the access cabinet with the current limiting cabinet output, the busbar PT cabinet is connected respectively to the output of access cabinet, be qualified for the next round of competitions cabinet 52F1, be qualified for the next round of competitions cabinet 52F2 connect the busbar 1 of total power station through switch cabinet 52F4, be qualified for the next round of competitions cabinet 52F3 connect the busbar 2 of total power station.
Bus 1 is connected with a No. 1 transformer through a switch cabinet QF14, bus 2 is connected with a No. 2 transformer through a switch cabinet QF15, bus 1 is connected with bus 3 through a switch cabinet QF18, bus 3 is connected with bus 2 through a switch cabinet QF16, and bus 3 is connected with a No. 3 transformer through a switch cabinet QF 17.
The switch cabinet 52F4 is interlocked with the switch cabinets QF14, QF17, QF18 and 52F 3.
Switch cabinet 52F4 can be switched on when switch cabinet QF14 switch-on, switch cabinet QF18 switch-off and switch cabinet 52F3 switch-off are met or switch cabinet QF14 switch-off, switch cabinet QF17 switch-on and switch cabinet QF18 switch-on are met.
The switching-on control loop of the breaker in the switch cabinet 52F4 comprises a switching-on switch, a switching-on coil, a normally-closed contact K1 of the breaker in the switch cabinet 52F3, a normally-open contact K2 of the breaker in the switch cabinet QF14, a normally-closed contact K3, a normally-open contact K4 of the breaker in the switch cabinet QF17, a normally-closed contact K5 of the breaker in the switch cabinet QF18, a normally-open contact K6, and +KM are sequentially connected with the normally-closed contact K1 through the switching-on switch and the switching-on coil, the normally-closed contact K1 is respectively connected with the normally-closed contact K3 and the normally-open contact K2, the normally-open contact K2 is connected with-KM, and the normally-closed contact K3 is sequentially connected with-KM through the normally-open contact K4 and the normally-open contact K6.
When the switch cabinet QF15 switch-on, the switch cabinet QF16 switch-off and 52F4 switch-off or the switch cabinet QF15 switch-off, the switch cabinet QF16 switch-on, the switch cabinet QF17 switch-on and 52F4 switch-off are met, the switch cabinet 52F3 can be switched on.
The switching-on loop of the breaker in the switch cabinet 52F3 comprises a breaker normally-open contact K7 in the switch cabinet QF15, a normally-closed contact K8, a breaker normally-open contact K9 in the switch cabinet QF16, a normally-closed contact K10, a breaker normally-open contact K4 in the switch cabinet QF17, and a breaker normally-closed contact K11 in the switch cabinet 52F4, wherein +KM is connected with the normally-closed contact K11 after passing through a switching-on switch and a switching-on coil, the normally-closed contact K11 is respectively connected with the normally-open contact K7 and the normally-closed contact K8, the normally-open contact K7 is connected with-KM, and the normally-closed contact K8 is sequentially connected with-KM through the normally-open contact K9 and the normally-open contact K4.
When the switch cabinet 52F3 is closed and the switch cabinet 52F1 is opened, the switch cabinet 52F2 can be closed; the switching-on loop of the breaker in the switch cabinet 52F2 comprises a switching-on switch, a switching-on coil and normally-open contacts K12 and K13 of the breaker in the 52F3 and normally-closed contacts K13 of the breaker in the 52F1, and +KM is connected with the switching-on switch, the switching-on coil, the normally-open contacts K12 and the normally-closed contacts K13.
When the switch cabinet 52F4 is closed and the switch cabinet 52F2 is opened, the switch cabinet 52F1 can be closed; the 52F1 switching-on loop comprises a switching-on switch, a switching-on coil, a normally open contact K14 of a circuit breaker in a switch cabinet 52F4 and a normally closed contact K15 of the circuit breaker in a switch cabinet 52F2, and the +KM is connected with the-KM after passing through the switching-on switch, the switching-on coil, the normally open contact K14 and the normally closed contact K15 in sequence.
When one of 52F1 closing or 52F2 closing is met, 52F can be closed; the switching-on loop of the circuit breaker in 52F comprises a switching-on switch, a switching-on coil and normally open contacts K16 and K17 in 52F2 of the circuit breaker in 52F1, wherein +KM is connected with-KM after passing through the switching-on switch, the switching-on coil and the normally open contact K16 in sequence, and the normally open contacts K17 are connected at two ends of the normally open contact K16 in parallel.
The waste heat power generation system comprises a grid-connected bus, a grid-connected cabinet 52G, a switch cabinet 52H, a switch cabinet 52P, a switch cabinet 52S and a waste heat power station, wherein the waste heat power station is connected with the switch cabinet 52G through the switch cabinet 52S, the switch cabinet 52G is connected with the grid-connected bus, the grid-connected bus is connected with a transformer for a factory through the 52H, and the grid-connected bus is connected with the current-limiting switch cabinet through the 52P.
When the switch cabinet 52F is closed and the current-limiting switch cabinet is closed, the switch cabinet 52P can be closed; the circuit breaker switching-on loop in 52F includes switch-on switch, switch-on coil, the normally open contact K18 of 52F circuit breaker, the normally open contact K19 of current limiting switch cabinet circuit breaker, +KM is connected with normally open contact K18 after 52F circuit breaker's switch-on switch, switch-on coil, and normally open contact K18 often opens contact K19 and connects-KM.
When the switch cabinet 52P is closed, the switch cabinet 52S is closed and the switch cabinet 52H is closed, the switch cabinet 52G can be closed; the circuit breaker closing loop in the switch cabinet 52G comprises a closing switch, a closing coil, a normally open contact K20 of the circuit breaker in the switch cabinet 52P, a normally open contact K21 of the circuit breaker in the switch cabinet 52S and a normally open contact K22 of the circuit breaker in the switch cabinet 52H, and the +KM is connected with the switching-KM after passing through the closing switch, the closing coil, the normally open contact K20, the normally open contact K21 and the normally open contact K22 in sequence.
The invention has the advantages that: the system can reduce the complexity of wiring in total drop during grid connection, improve the stability of a waste heat power generation system and the total drop, set the interlocking between the switch cabinets, improve the power quality, ensure the safe and stable operation of the unit and provide reference for the subsequent grid connection and interlocking protection of various power supplies; the reliability, the safety and the economy of the power supply network are realized.
Drawings
The contents of the drawings and the marks in the drawings of the present specification are briefly described as follows:
FIG. 1 is a schematic diagram of a grid-connected system of the present invention;
FIG. 2 is a schematic diagram of a grid-connected bus segment structure according to the present invention;
FIG. 3 is a logic diagram of the interlock for switch cabinet 52F4 of the present invention;
FIG. 4 is a schematic diagram of the interlocking of the switch cabinet 52F4 of the present invention;
FIG. 5 is a logic diagram of the interlocking of the switch cabinet 52F3 of the present invention;
FIG. 6 is a schematic diagram of the interlocking of the switch cabinet 52F3 of the present invention;
FIG. 7 is a logic diagram of the interlocking of the switch cabinet 52F2 of the present invention;
FIG. 8 is a schematic diagram of the interlocking of the switch cabinet 52F2 of the present invention;
FIG. 9 is a logic diagram of the interlock for switch cabinet 52F1 of the present invention;
FIG. 10 is a schematic diagram of the interlocking of the switch cabinet 52F1 of the present invention;
FIG. 11 is a logic diagram of the interlock for switch cabinet 52F of the present invention;
FIG. 12 is a schematic diagram of a switch cabinet 52F of the present invention;
FIG. 13 is a schematic diagram of a 52P interlock according to the present invention;
fig. 14 is a schematic diagram of the interlocking of the switch cabinet 52G of the present invention.
Detailed Description
The following detailed description of the invention refers to the accompanying drawings, which illustrate preferred embodiments of the invention in further detail.
As shown in fig. 1 and 2, the total drop in the waste heat power plant comprises three main transformers, and two sections of 6kV buses are arranged below the main transformers, wherein the 3# main transformer is changed into standby. The 15MW waste heat generator set IS connected with two sections of 6kV buses under three main transformers in a grid connection mode, the waste heat generation bus-bar section IS specially arranged in total descent in design consideration, waste heat generation IS sent to the total descent from a T/G factory building, the waste heat generation bus-bar section IS connected with the waste heat generation bus-bar section through a current limiting switch cabinet IS-LIMITER, one side of the connection cabinet and one side of a bus PT cabinet are arranged, and two sides of an outgoing line cabinet are connected with the two sections of 6kV buses in total descent respectively. And designing a public grid-connected bus, and realizing grid connection with the total two-section bus by the two-way grid-connected cabinet.
The specific grid-connected circuit comprises: the waste heat power generation system IS connected with the grid-connected bus-connected section through a current limiting switch cabinet, the grid-connected bus-connected section comprises a bus PT cabinet 1YH, an access cabinet 52F, an outgoing cabinet 52F2 and an outgoing cabinet 52F1, the output end of the current limiting cabinet IS-LIMITER IS connected with the access cabinet, the output end of the access cabinet 52F IS respectively connected with the bus PT cabinet, the outgoing cabinet 52F1 and the outgoing cabinet 52F2, the outgoing cabinet 52F1 IS connected with the bus 1 of the total power reduction station through a switch cabinet 52F4, and the outgoing cabinet 52F2 IS connected with the bus 2 of the total power reduction station through a switch cabinet 52F 3.
Bus 1 is connected with a No. 1 transformer through a switch cabinet QF14, bus 2 is connected with a No. 2 transformer through a switch cabinet QF15, bus 1 is connected with bus 3 through a switch cabinet QF18, bus 3 is connected with bus 2 through a switch cabinet QF16, and bus 3 is connected with a No. 3 transformer through a switch cabinet QF 17.
The waste heat power generation system comprises a grid-connected bus, a grid-connected cabinet 52G, a switch cabinet 52H, a switch cabinet 52P, a switch cabinet 52S and a waste heat power station, wherein the waste heat power station is connected with the switch cabinet 52G through the switch cabinet 52S, the switch cabinet 52G is connected with the grid-connected bus, the grid-connected bus is connected with a transformer for a factory through the 52H, and the grid-connected bus is connected with the current-limiting switch cabinet through the 52P.
The interlocking logic relationship of the three main transformers and the two sections of buses after being connected into the waste heat power generation is complex, and besides the two main transformers which are in normal operation, the interlocking safety and reliability are guaranteed under the condition that the 3# standby transformer is put into operation, the interlocking relationship of the switch cabinets of the two loops of the generator components is designed when the two loops are connected into the grid, so that the safe and stable operation of the unit is ensured.
As shown in fig. 3 and 4, the switch cabinet 52F4 is interlocked with the switch cabinets QF14, QF17, QF18, and 52F 3. Switch cabinet 52F4 can be switched on when switch cabinet QF14 switch-on, switch cabinet QF18 switch-off and switch cabinet 52F3 switch-off are met or switch cabinet QF14 switch-off, switch cabinet QF17 switch-on and switch cabinet QF18 switch-on are met.
The switching-on control loop of the breaker in the switch cabinet 52F4 comprises a switching-on switch, a switching-on coil, a normally-closed contact K1 of the breaker in the switch cabinet 52F3, a normally-open contact K2 of the breaker in the switch cabinet QF14, a normally-closed contact K3, a normally-open contact K4 of the breaker in the switch cabinet QF17, a normally-closed contact K5 of the breaker in the switch cabinet QF18, a normally-open contact K6, and +KM are sequentially connected with the normally-closed contact K1 through the switching-on switch and the switching-on coil, the normally-closed contact K1 is respectively connected with the normally-closed contact K3 and the normally-open contact K2, the normally-open contact K2 is connected with-KM, and the normally-closed contact K3 is sequentially connected with-KM through the normally-open contact K4 and the normally-open contact K6. When the breaker in the switch cabinet 52F4 is closed, the auxiliary contacts corresponding to the other switch cabinets interlocked with the corresponding actions are required to be closed and opened to realize the energizing of the closing loop, so that the closing coil is energized, and then the closing of the switch cabinet 52F4 can be completed.
As shown in fig. 5 and 6, the switch cabinet 52F3 can be closed when the switch cabinet QF15 closing, the switch cabinet QF16 opening and 52F4 opening or the switch cabinet QF15 opening, the switch cabinet QF16 closing, the switch cabinet QF17 closing and 52F4 opening are satisfied.
The switching-on loop of the breaker in the switch cabinet 52F3 comprises a breaker normally-open contact K7 in the switch cabinet QF15, a normally-closed contact K8, a breaker normally-open contact K9 in the switch cabinet QF16, a normally-closed contact K10, a breaker normally-open contact K4 in the switch cabinet QF17, and a breaker normally-closed contact K11 in the switch cabinet 52F4, wherein +KM is connected with the normally-closed contact K11 after passing through a switching-on switch and a switching-on coil, the normally-closed contact K11 is respectively connected with the normally-open contact K7 and the normally-closed contact K8, the normally-open contact K7 is connected with-KM, and the normally-closed contact K8 is sequentially connected with-KM through the normally-open contact K9 and the normally-open contact K4.
When the normally open contact K11 is closed and the normally open contact K7 is closed, or when the normally open contact K11 is closed, the normally closed contact K8 is closed and the normally open contact K9 is closed and the normally open contact K4 is closed, the closing switch is closed at the moment to enable the closing loop to form an electric loop, and closing can be completed. At the moment, the auxiliary contacts of the circuit breaker are respectively switched on by the switch cabinet QF15, switched off by the switch cabinet QF16 and switched off by 52F4 or switched off by the switch cabinet QF15, switched on by the switch cabinet QF16, switched on by the switch cabinet QF17 and switched off by 52F 4. Because the switching-on and switching-off operations of the switch cabinets are controlled by the main circuit breaker, the auxiliary contacts of the circuit breakers of each switch cabinet are interlocked and arranged in the switching-on loops of the circuit breakers of other switch cabinets, so that the safety of the opening of the switch cabinets is ensured.
As shown in fig. 7 and 8, when the switch cabinet 52F3 is closed and the switch cabinet 52F1 is opened, the switch cabinet 52F2 can be closed; the switching-on loop of the breaker in the switch cabinet 52F2 comprises a switching-on switch, a switching-on coil and normally-open contacts K12 and K13 of the breaker in the 52F3 and normally-closed contacts K13 of the breaker in the 52F1, and +KM is connected with the switching-on switch, the switching-on coil, the normally-open contacts K12 and the normally-closed contacts K13. When 52F3 is closed and 52F1 is opened, normally open contact K12 of the breaker in 52F3 is closed, normally closed contact K13 of the breaker in 52F is also closed, and the closing switch is closed, so that an electric loop can be formed in a closing loop of the breaker in 52F2, and if not, an electric loop cannot be formed, and the closing cannot be performed.
As shown in fig. 9 and 10, when the switch cabinet 52F4 is closed and the switch cabinet 52F2 is opened, the switch cabinet 52F1 can be closed; the 52F1 switching-on loop comprises a switching-on switch, a switching-on coil, a normally open contact K14 of a circuit breaker in a switch cabinet 52F4 and a normally closed contact K15 of the circuit breaker in a switch cabinet 52F2, and the +KM is connected with the-KM after passing through the switching-on switch, the switching-on coil, the normally open contact K14 and the normally closed contact K15 in sequence. The normally open contact K14 of the breaker in the switch cabinet 52F4 and the normally closed contact K15 of the breaker in the switch cabinet 52F2 are arranged in series in the switching-on loop of the breaker of the switch cabinet 52F1, and only when the K15 and the K15 are both closed, namely when the switch cabinet 52F4 is switched on and the switch cabinet 52F2 is switched off, the switching-on switch is closed at the moment to enable the switching-on loop of the breaker of the switch cabinet 52F1 to form a circuit loop, so that switching-on operation is completed.
As shown in fig. 11 and 12, when one of the 52F1 closing and the 52F2 closing is satisfied, the 52F can be closed; the switching-on loop of the circuit breaker in 52F comprises a switching-on switch, a switching-on coil and normally open contacts K16 and K17 in 52F2 of the circuit breaker in 52F1, wherein +KM is connected with-KM after passing through the switching-on switch, the switching-on coil and the normally open contact K16 in sequence, and the normally open contacts K17 are connected at two ends of the normally open contact K16 in parallel. When any of the normally open contacts K16 or K17 is closed, a closing switch of the breaker in the 52F is operated to enable the closing loop to form an electric loop, and at the moment, the closing of the breaker in the 52F1 or the closing of the breaker in the 52F2 is met.
When the switch cabinet 52F is closed and the current-limiting switch cabinet is closed, the switch cabinet 52P can be closed; the circuit breaker switching-on loop in 52F includes switch-on switch, switch-on coil, the normally open contact K18 of 52F circuit breaker, the normally open contact K19 of current limiting switch cabinet circuit breaker, +KM is connected with normally open contact K18 after 52F circuit breaker's switch-on switch, switch-on coil, and normally open contact K18 often opens contact K19 and connects-KM.
When the switch cabinet 52P is closed, the switch cabinet 52S is closed and the switch cabinet 52H is closed, the switch cabinet 52G can be closed; the circuit breaker closing loop in the switch cabinet 52G comprises a closing switch, a closing coil, a normally open contact K20 of the circuit breaker in the switch cabinet 52P, a normally open contact K21 of the circuit breaker in the switch cabinet 52S and a normally open contact K22 of the circuit breaker in the switch cabinet 52H, and the +KM is connected with the switching-KM after passing through the closing switch, the closing coil, the normally open contact K20, the normally open contact K21 and the normally open contact K22 in sequence.
The interlocking logic and the implementation mode of the switch cabinet in the grid-connected system are described, the interlocking is realized through the auxiliary contact of the breaker in the switch cabinet, the safety of the switching-on operation of the switch cabinet is ensured, and the whole grid-connected system can safely and stably operate.
It is obvious that the specific implementation of the present invention is not limited by the above-mentioned modes, and that it is within the scope of protection of the present invention only to adopt various insubstantial modifications made by the method conception and technical scheme of the present invention.
Claims (7)
1. The utility model provides a waste heat power generation grid-connected system, includes waste heat power generation system, total power station that falls, its characterized in that: the system comprises a power generation system, a power generation system and a power generation system, wherein the power generation system is connected with the power generation system through a current limiting switch cabinet, the power generation system comprises a bus PT cabinet 1YH, an access cabinet 52F, an outgoing line cabinet 52F2 and an outgoing line cabinet 52F1, the output end of the current limiting switch cabinet is connected with the access cabinet, the output end of the access cabinet is respectively connected with the bus PT cabinet, the outgoing line cabinet 52F1 and the outgoing line cabinet 52F2, the outgoing line cabinet 52F1 is connected with a bus 1 of a total power reduction station through a switch cabinet 52F4, and the outgoing line cabinet 52F2 is connected with a bus 2 of the total power reduction station through a switch cabinet 52F 3; bus 1 is connected with a No. 1 transformer through a switch cabinet QF14, bus 2 is connected with a No. 2 transformer through a switch cabinet QF15, bus 1 is connected with bus 3 through a switch cabinet QF18, bus 3 is connected with bus 2 through a switch cabinet QF16, and bus 3 is connected with a No. 3 transformer through a switch cabinet QF 17;
the switch cabinet 52F4 is interlocked with the switch cabinets QF14, QF17, QF18 and 52F 3; when the switch cabinet QF14 is closed, the switch cabinet QF18 is opened and the switch cabinet 52F3 is opened or the switch cabinet QF14 is opened, the switch cabinet QF17 is closed and the switch cabinet QF18 is closed, the switch cabinet 52F4 can be closed;
the switching-on control loop of the breaker in the switch cabinet 52F4 comprises a switching-on switch, a switching-on coil, a normally-closed contact K1 of the breaker in the switch cabinet 52F3, a normally-open contact K2 of the breaker in the switch cabinet QF14, a normally-closed contact K3, a normally-open contact K4 of the breaker in the switch cabinet QF17, a normally-closed contact K5 of the breaker in the switch cabinet QF18, a normally-open contact K6, +KM sequentially passes through the switching-on switch and the switching-on coil to be connected with the normally-closed contact K1, the normally-closed contact K1 is respectively connected with the normally-closed contact K3 and the normally-open contact K2, the normally-open contact K5 is connected with-KM, and the normally-closed contact K3 is sequentially connected with-KM through the normally-open contact K4 and the normally-open contact K6; when the switch cabinet QF15 switch-on, the switch cabinet QF16 switch-off and 52F4 switch-off or the switch cabinet QF15 switch-off, the switch cabinet QF16 switch-on, the switch cabinet QF17 switch-on and 52F4 switch-off are met, the switch cabinet 52F3 can be switched on; the switching-on loop of the breaker in the switch cabinet 52F3 comprises a breaker normally-open contact K7 in the switch cabinet QF15, a normally-closed contact K8, a breaker normally-open contact K9 in the switch cabinet QF16, a normally-closed contact K10, a breaker normally-open contact K4 in the switch cabinet QF17, and a breaker normally-closed contact K11 in the switch cabinet 52F4, wherein +KM is connected with the normally-closed contact K11 after passing through a switching-on switch and a switching-on coil, the normally-closed contact K11 is respectively connected with the normally-open contact K7 and the normally-closed contact K8, the normally-open contact K7 is connected with-KM, and the normally-closed contact K8 is sequentially connected with-KM through the normally-open contact K9 and the normally-open contact K4.
2. The cogeneration grid-tie system of claim 1 wherein: when the switch cabinet 52F3 is closed and the switch cabinet 52F1 is opened, the switch cabinet 52F2 can be closed; the switching-on loop of the breaker in the switch cabinet 52F2 comprises a switching-on switch, a switching-on coil and normally-open contacts K12 and K13 of the breaker in the 52F3 and normally-closed contacts K13 of the breaker in the 52F1, and +KM is connected with the switching-on switch, the switching-on coil, the normally-open contacts K12 and the normally-closed contacts K13.
3. The cogeneration grid-tie system of claim 1 wherein: when the switch cabinet 52F4 is closed and the switch cabinet 52F2 is opened, the switch cabinet 52F1 can be closed; the 52F1 switching-on loop comprises a switching-on switch, a switching-on coil, a normally open contact K14 of a circuit breaker in a switch cabinet 52F4 and a normally closed contact K15 of the circuit breaker in a switch cabinet 52F2, and the +KM is connected with the-KM after passing through the switching-on switch, the switching-on coil, the normally open contact K14 and the normally closed contact K15 in sequence.
4. The cogeneration grid-tie system of claim 1 wherein: when one of 52F1 closing or 52F2 closing is met, 52F can be closed; the switching-on loop of the circuit breaker in 52F comprises a switching-on switch, a switching-on coil and normally open contacts K16 and K17 in 52F2 of the circuit breaker in 52F1, wherein +KM is connected with-KM after passing through the switching-on switch, the switching-on coil and the normally open contact K16 in sequence, and the normally open contacts K17 are connected at two ends of the normally open contact K16 in parallel.
5. The cogeneration grid-tie system of claim 1 wherein: the waste heat power generation system comprises a grid-connected bus, a grid-connected cabinet 52G, a switch cabinet 52H, a switch cabinet 52P, a switch cabinet 52S and a waste heat power station, wherein the waste heat power station is connected with the switch cabinet 52G through the switch cabinet 52S, the switch cabinet 52G is connected with the grid-connected bus, the grid-connected bus is connected with a transformer for a factory through the 52H, and the grid-connected bus is connected with the current-limiting switch cabinet through the 52P.
6. The cogeneration grid-tie system of claim 5 wherein: when the switch cabinet 52F is closed and the current-limiting switch cabinet is closed, the switch cabinet 52P can be closed; the circuit breaker switching-on loop in 52F includes switch-on switch, switch-on coil, the normally open contact K18 of 52F circuit breaker, the normally open contact K19 of current limiting switch cabinet circuit breaker, +KM is connected with normally open contact K18 after 52F circuit breaker's switch-on switch, switch-on coil, and normally open contact K18 often opens contact K19 and connects-KM.
7. The cogeneration grid-tie system of claim 5 wherein: when the switch cabinet 52P is closed, the switch cabinet 52S is closed and the switch cabinet 52H is closed, the switch cabinet 52G can be closed; the circuit breaker closing loop in the switch cabinet 52G comprises a closing switch, a closing coil, a normally open contact K20 of the circuit breaker in the switch cabinet 52P, a normally open contact K21 of the circuit breaker in the switch cabinet 52S and a normally open contact K22 of the circuit breaker in the switch cabinet 52H, and the +KM is connected with the switching-KM after passing through the closing switch, the closing coil, the normally open contact K20, the normally open contact K21 and the normally open contact K22 in sequence.
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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107612031A CN107612031A (en) | 2018-01-19 |
| CN107612031B true CN107612031B (en) | 2024-01-23 |
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Family Applications (1)
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