CN113964873B - Garbage power generation grid-connected and security power supply system - Google Patents
Garbage power generation grid-connected and security power supply system Download PDFInfo
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- CN113964873B CN113964873B CN202111420063.9A CN202111420063A CN113964873B CN 113964873 B CN113964873 B CN 113964873B CN 202111420063 A CN202111420063 A CN 202111420063A CN 113964873 B CN113964873 B CN 113964873B
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- 238000010248 power generation Methods 0.000 title claims abstract description 24
- 238000002679 ablation Methods 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 5
- 238000012423 maintenance Methods 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 7
- 238000011161 development Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- 239000002699 waste material Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/007—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources
- H02J3/0073—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources for providing alternative feeding paths between load and source when the main path fails, e.g. transformers, busbars
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Abstract
The invention discloses a garbage power generation grid-connected and security power supply system, which comprises a plurality of garbage power stations, booster station buses, a booster transformer and a 35KV power supply grid, wherein each garbage power station is connected with the booster station bus through a power station interconnection incoming line cabinet, and the booster station bus is connected with the 35KV power supply grid through the booster transformer; and controlling the grid-connected operation of each garbage power station by controlling the power station contact incoming line cabinet of each garbage power station. The invention has the advantages that: the system is safe and reliable for the grid connection of the garbage generator set, and meanwhile, the safety power switch cabinet is arranged, so that the requirements of safe operation and maintenance are met, the functions of safety and automation are also embodied on operation management, and the system has good popularization prospect; and the interlocking is arranged, so that the interlocking is arranged between the input of the safety power switch cabinet and the grid-connected related switch, and the safety and reliability of the input are ensured.
Description
Technical Field
The invention relates to the technical field of power generation, in particular to a garbage power generation grid-connected and security power supply system.
Background
With the rapid development of urban construction in China, urban garbage is gradually increased, the annual garbage yield is hundreds of millions of tons, and garbage surrounding cities become a global trend. In China, which is currently developing at a high speed, the problem of 'garbage surrounding city' is encountered. Aiming at the difficult problem, the urban garbage is required to be reasonably treated, so that the environmental pollution is reduced, and the necessity is high. In recent years, the domestic garbage incineration power generation technology has faster development, and the popularization and the application of garbage incineration power generation have positive significance for urban garbage treatment. With the gradual domestic and standardized development of domestic garbage incineration treatment, urban garbage is increasingly increased, and the garbage incineration power generation technology is imperative, so that the method has a considerable prospect. In the prior art, the mode that one generator set generates electricity but the generator set generates electricity by garbage combustion cannot meet the demands of users, but the power supply mode of two or more generator sets is not disclosed in the literature, and how to realize and how to ensure that the multiple generator sets are connected in multiple loops under the condition of overhauling and the like needs to be considered for solving, and no relevant solution exists in the prior art.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a garbage power generation grid-connected and security power supply system, solves the problem of multi-loop grid connection of more than two generator sets based on the power supply modes of the two or more than two generator sets, increases a security power supply loop, ensures safe and stable operation of the generator sets, provides reference for the subsequent grid connection and interlocking protection of various power supplies, and realizes the reliability, safety and economy of a power supply network.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: a garbage power generation grid-connected and security power supply system comprises a plurality of garbage power stations, booster station buses, a booster transformer and a 35KV power supply grid, wherein each garbage power station is connected with the booster station bus through a power station connection incoming line cabinet, and the booster station bus is connected with the 35KV power supply grid through the booster transformer; and controlling the grid-connected operation of each garbage power station by controlling the power station contact incoming line cabinet of each garbage power station.
Each garbage power station comprises a generator set and a power station bus, wherein the generator set is connected with the power station bus through a switch cabinet, and the power station bus is connected with a booster station bus through a communication incoming line cabinet; the buses of each power station are sequentially connected in series through the isolating switch cabinet and the bus-bar switch cabinet.
And one of the garbage power stations is selected, and a power station bus is connected to a low-voltage power supply grid through a safety power connection incoming line cabinet.
The safety power supply interconnection incoming line cabinet, the power station interconnection incoming line cabinet and the bus-bar switch cabinet are provided with interlocking control to control opening and closing of the safety power supply interconnection incoming line cabinet and the power station interconnection incoming line cabinet; the interlocking control sets the interlocking through relay contacts in each switch cabinet.
The number of the garbage power stations is two, namely a 1# power station and a 2# power station; the power station bus of the No. 1 power station is connected to a low-voltage power supply grid through a security power connection incoming line cabinet; the power station bus of the No. 1 power station is connected with the booster station bus through the inlet wire cabinet 52F1 which is connected with the booster station bus after the 52P12 contacts with the inlet wire cabinet; the power station bus of the No. 1 power station is connected to the power station bus of the No. 2 power station after passing through the isolating switch cabinet 52GL and the bus switch cabinet 52 ML; the power station bus of the No. 2 power station is connected to the booster station bus after passing through the 52P2 communication incoming line cabinet and the booster station bus incoming line cabinet 52F 2.
The safety power supply interconnection incoming line cabinet 52P11 is put into use when a booster station bus, a booster station and/or a 35KV power supply grid fails; an interlocking system is arranged between the security power connection incoming line cabinet 52P11 and the bus-bar switch cabinet 52ML, the connection incoming line cabinet 52P12 and the connection incoming line cabinet 52P2, and the interlocking relationship is as follows: when the 52ML cabinet is in the opening position and the 52P12 cabinet is in the opening position; or 52ML cabinet is in a closing position, 52P12 cabinet is in a separating brake position and 52P2 cabinet is in a separating brake position, 52P11 cabinet allows closing; when the 52ML cabinet is at the opening position and the 52P12 cabinet is at the closing position; or 52ML cabinet closing position, 52P12 cabinet, 52P2 cabinet any closing position, 52P11 cabinet opening.
When no faults exist in a booster station bus, a booster station and/or a 35KV power supply grid, 52P11 is switched off, and then a 1# power station and a 2# power station are put into grid connection; wherein, the No. 1 unit is connected in grid: when 52F1 cabinet is switched on, 52P12 can be switched on, and after the synchronization is found in the grid-connected cabinet 52G1 of the No. 1 generator set, the generated electricity is connected to a public grid-connected bus through 52F1 and 52P12 and then is sent to a power grid through a step-up transformer; ablation 52P12 loop: when one of the three of the 52F1 cabinet tripping, the 52P11 cabinet closing and the 52ML cabinet closing is about to occur, the 52P12 cabinet is opened; the grid-connected machine set No. 2 is connected with the grid-connected machine set, the grid-connected machine set No. 2 is connected with the grid-connected machine set No. 52, the grid-connected machine set No. 52 is connected with the grid-connected machine set No. 52, and the grid-connected machine set No. 52 is connected with the grid through the step-up transformer after the grid-connected machine set No. 52; ablation 52P2 loop: when one of the 52F2 cabinet tripping and the 52ML cabinet closing is about to occur, the 52P2 cabinet is opened.
The invention has the advantages that: the system is safe and reliable for the grid connection of the garbage generator set, and meanwhile, the safety power switch cabinet is arranged, so that the requirements of safe operation and maintenance are met, the functions of safety and automation are also embodied on operation management, and the system has good popularization prospect; and the interlocking is arranged, so that the interlocking is arranged between the input of the safety power switch cabinet and the grid-connected related switch, and the safety and reliability of the input are ensured.
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 the electrical principle of the system of the present invention;
FIG. 2 is a wiring electrical diagram of the system of the present invention
FIG. 3 is a diagram of the interlocking relationship of the 52P11 switch cabinet of the present invention;
FIG. 4 is a diagram of the interlocking relationship of the 52P12 switch cabinet of the present invention;
fig. 5 is a diagram of the interlocking relationship of the 52P2 switch cabinet 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.
The application mainly aims at the implementation scheme of grid connection and overhaul of a garbage power plant. Firstly, the factory buildings of a power plant are in a first period, a second period or three-four-five periods, the power generated in each period is the same or different, and a 10KV power grid can be used for directly connecting to the grid, but when the power generated in a plurality of periods of power plants is large, the power generated in the power plants cannot be directly connected to the grid, an electric scheme of the grid connection of each period of factory buildings is required to be designed, meanwhile, how to overhaul is required to be realized is also required to be considered, meanwhile, the grid connection interlocking logic is also required to be considered, so that safe and reliable operation is ensured, and based on the system, the system and the method, disclosed by the application, are specifically designed as follows:
A garbage power generation grid-connected and security power supply system comprises a plurality of garbage power stations, booster station buses, a booster transformer and a 35KV power supply grid, wherein each garbage power station is connected with the booster station bus through a power station connection incoming line cabinet, and the booster station bus is connected with the 35KV power supply grid through the booster transformer; and controlling the grid-connected operation of each garbage power station by controlling the power station contact incoming line cabinet of each garbage power station. The garbage power stations are respectively a 1# garbage power station, a 2# garbage power station and a 3# garbage power station, each garbage power station adopts a 10KV voltage standard, and in order to achieve larger power generation power, the garbage power stations cannot be directly connected in a grid mode, and therefore a booster station bus is used for boosting the power generated by each power station through boosting change and then transmitting the boosted power to a 35KV power grid so as to achieve grid connection of the power stations, and the garbage power stations can be achieved through controlling each switch cabinet.
In order to ensure that each garbage power station comprises a generator set and a power station bus, the generator set is connected with the power station bus through a switch cabinet, and the power station bus is connected with a booster station bus through a communication incoming line cabinet; the buses of each power station are sequentially connected in series through the isolating switch cabinet and the bus-bar switch cabinet. And one of the garbage power stations is selected, and a power station bus is connected to a low-voltage power supply grid through a safety power connection incoming line cabinet. In order to realize convenient maintenance or when 35KV faults and maintenance are carried out, the power generation of the power station is normally connected with the grid, a safety power supply is arranged, and the power grid is integrated into a relatively low-voltage power grid of 10KV in a mode that the safety power supply is communicated with a wire inlet cabinet.
In order to ensure safety, the control of grid connection and safety power supply input is realized, so that reliable control of the grid connection and safety power supply interconnection incoming line cabinet is realized, and interlocking control is arranged on the safety power supply interconnection incoming line cabinet, the power station interconnection incoming line cabinet and the bus-bar switch cabinet to control opening and closing of the safety power supply interconnection incoming line cabinet; the interlocking control realizes the interlocking of switching on and switching off among the switch cabinets through the arrangement of the normally open and normally closed contacts of the relays in the switch cabinets by setting the interlocking through the relay contacts in the switch cabinets, thereby avoiding the safety accidents of switching on and switching off and ensuring the safe operation of grid connection.
The application is illustrated by way of example with two waste power stations, as shown in figures 1 and 2, respectively a 1# power station and a 2# power station; i.e. the 1# generator, the 2# generator and the transformers of the corresponding various power stations in the figure.
The wiring schematic diagram is shown in figures 1 and 2, and a power station bus of a No. 1 power station is connected into a 10KV low-voltage power supply grid through a security power supply interconnection incoming line cabinet 52P 11; the power station bus of the No. 1 power station is connected with the booster station bus through the inlet wire cabinet 52F1 which is connected with the booster station bus after the 52P12 contacts with the inlet wire cabinet; the power station bus of the No. 1 power station is connected to the power station bus of the No. 2 power station after passing through the isolating switch cabinet 52GL and the bus switch cabinet 52 ML; the power station bus of the No. 2 power station is connected to the booster station bus after passing through the 52P2 communication incoming line cabinet and the booster station bus incoming line cabinet 52F 2.
The safety power supply interconnection incoming line cabinet 52P11 is put into use when a booster station bus, a booster station and/or a 35KV power supply grid fails; an interlocking system is arranged between the security power connection incoming line cabinet 52P11 and the bus-bar switch cabinet 52ML, the connection incoming line cabinet 52P12 and the connection incoming line cabinet 52P2, and the interlocking relationship is as follows: when the 52ML cabinet is in the opening position and the 52P12 cabinet is in the opening position; or 52ML cabinet is in a closing position, 52P12 cabinet is in a separating brake position and 52P2 cabinet is in a separating brake position, 52P11 cabinet allows closing; when the 52ML cabinet is at the opening position and the 52P12 cabinet is at the closing position; or 52ML cabinet closing position, 52P12 cabinet, 52P2 cabinet any closing position, 52P11 cabinet opening. Therefore, the power generation of the power station can be directly connected to 10KV during maintenance, and the continuous and effective performance of the power generation is ensured; and maintenance is not delayed, so that continuous and effective power generation and safe and reliable operation of the grid connection of the system are ensured.
When no faults exist in a booster station bus, a booster station and/or a 35KV power supply grid, 52P11 is switched off, and then a 1# power station and a 2# power station are put into grid connection; wherein, the No. 1 unit is connected in grid: when 52F1 cabinet is switched on, 52P12 can be switched on, and after the synchronization is found in the grid-connected cabinet 52G1 of the No. 1 generator set, the generated electricity is connected to a public grid-connected bus through 52F1 and 52P12 and then is sent to a power grid through a step-up transformer; ablation 52P12 loop: when one of the three of the 52F1 cabinet tripping, the 52P11 cabinet closing and the 52ML cabinet closing is about to occur, the 52P12 cabinet is opened; the grid-connected machine set No. 2 is connected with the grid-connected machine set, the grid-connected machine set No. 2 is connected with the grid-connected machine set No. 52, the grid-connected machine set No. 52 is connected with the grid-connected machine set No. 52, and the grid-connected machine set No. 52 is connected with the grid through the step-up transformer after the grid-connected machine set No. 52; ablation 52P2 loop: when one of the 52F2 cabinet tripping and the 52ML cabinet closing is about to occur, the 52P2 cabinet is opened. The interlocking relation among the switch cabinets is set to ensure safe and reliable system integration into the power grid, avoid conflict among power stations directly integrated into the power grid, and ensure safe and reliable operation of the system.
The application solves the problem of multi-loop grid connection of more than two generator sets based on the power supply modes of the two or more than two generator sets, increases a security power supply loop, ensures safe and stable operation of the generator sets, provides reference for the subsequent grid connection and interlocking protection of various power supplies, and realizes the reliability, the security and the economy of a power supply network.
As shown in fig. 1 and 2, a public grid-connected bus is designed to solve the grid-connected problem of two units. The 2X 6MW generating set of the garbage power plant operates in a split mode, and is designed to be used in a booster station for a 10kV bus-tie section, and two generating sets are respectively connected into the booster station for the 10kV bus-tie section.
The safety power supply is designed to ensure that the unit can run and overhaul more reliably. If a 10/35kV booster station or a 35kV line fails, the power supply circuit is put into a security protection power supply circuit, so that the security maintenance and temporary power generation grid connection of two sets of generator sets can be ensured.
The problem of the interlocking of two units of garbage power generation and a safety power supply is solved, and an interlocking schematic diagram is shown in figures 3,4 and 5:
Case 1: under the condition of no power such as the failure of a 10/35kV booster station or a 35kV line, the system is put into a security power circuit: when the 52ML cabinet is in the opening position and the 52P12 cabinet is in the opening position; or when the 52ML cabinet is in the closing position, the 52P12 cabinet is in the opening position and the 52P2 cabinet is in the opening position, a security power circuit can be put into, namely the 52P11 cabinet is closed. Cutting off a safety power supply loop: when the 52ML cabinet is in a switching-off position and the 52P12 cabinet is in a switching-on position; or the 52ML cabinet closing position, and when the 52P12 cabinet 52P2 cabinet only has one closing position, the security power circuit can be cut off, namely the 52P11 cabinet is opened.
Case 2: under the normal condition of a 10/35kV booster station, the No. 1 unit is connected with a grid. 52ML cabinet and 52P11 cabinet separating brake position, 52P12 just can be closed when 52F1 cabinet is closed, and the electricity that like this 1# generating set is incorporated into the net and is connected into the generating line through 52F1 and 52P12 after the synchronization was found to the grid-connected cabinet 52G1, and then sends into the electric wire netting through the step-up transformer. Ablation 52P12 loop: when one of the three of the 52F1 cabinet tripping, the 52P11 cabinet closing and the 52ML cabinet closing is about to occur, the 52P12 cabinet is opened.
Case 3: under the normal condition of a 10/35kV booster station, the No. 2 unit is connected with a grid. When 52F2 cabinet is closed at the opening position of 52ML cabinet, 52P2 can be closed, so that after the synchronization is found by 52G2 of the 2# generator set grid-connected cabinet, the common grid-connected bus is connected through 52F2 and 52P12 and 52F2 and 52P2 cabinets, and the common grid-connected bus is fed into a power grid through a step-up transformer. Ablation 52P2 loop: when one of the 52F2 cabinet tripping and the 52ML cabinet closing is about to occur, the 52P2 cabinet is opened. The linkage relation solves the problem of linkage of the grid connection and the safety power supply of the two garbage power generation units, and ensures safe and stable operation of the units.
After the power generation grid-connected and security power supply system is applied in accordance with the application places, the requirements of safe operation and maintenance are met, the functions of safety and automation are also embodied in operation management, and the power generation grid-connected and security power supply system has good popularization prospect. After the scheme is implemented by the applicant, the two sets of generator set power supply grid-connected systems of the project are safe and reliable to operate, power generation can provide 9120 ten thousand kW for society every year, the power generation is equivalent to 5928 ten thousand yuan per year, and 20 ten thousand tons of household garbage are treated every year. Great benefits are made for national economy and social development.
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 (4)
1. A garbage power generation grid-connected and security power system is characterized in that: the garbage power station comprises a plurality of garbage power stations, booster station buses, a booster transformer and a 35KV power supply grid, wherein each garbage power station is connected with the booster station bus through a power station connection incoming line cabinet, and the booster station bus is connected with the 35KV power supply grid through the booster transformer; the grid-connected operation of each garbage power station is controlled by controlling a power station contact incoming line cabinet of each garbage power station;
The safety power supply interconnection incoming line cabinet, the power station interconnection incoming line cabinet and the bus-bar switch cabinet are provided with interlocking control to control opening and closing of the safety power supply interconnection incoming line cabinet and the power station interconnection incoming line cabinet; the interlocking control is that the interlocking is set through relay contacts in each switch cabinet;
The number of the garbage power stations is two, namely a 1# power station and a 2# power station; the power station bus of the No. 1 power station is connected to a low-voltage power supply grid through a security power connection incoming line cabinet; the power station bus of the No. 1 power station is connected with the booster station bus through the inlet wire cabinet 52F1 which is connected with the booster station bus after the 52P12 contacts with the inlet wire cabinet; the power station bus of the No. 1 power station is connected to the power station bus of the No. 2 power station after passing through the isolating switch cabinet 52GL and the bus-bar switch cabinet 52 ML; the power station bus of the No. 2 power station is connected to the booster station bus after passing through a 52P2 contact incoming line cabinet and a booster station bus incoming line cabinet 52F 2;
The safety power supply interconnection incoming line cabinet 52P11 is put into use when a booster station bus, a booster station and/or a 35KV power supply grid fails; an interlocking system is arranged between the security power connection incoming line cabinet 52P11 and the bus-bar switch cabinet 52ML, the connection incoming line cabinet 52P12 and the connection incoming line cabinet 52P2, and the interlocking relationship is as follows: when the 52ML cabinet is in the opening position and the 52P12 cabinet is in the opening position; or 52ML cabinet is in a closing position, 52P12 cabinet is in a separating brake position and 52P2 cabinet is in a separating brake position, 52P11 cabinet allows closing; when the 52ML cabinet is at the opening position and the 52P12 cabinet is at the closing position; or 52ML cabinet closing position, 52P12 cabinet, 52P2 cabinet any closing position, 52P11 cabinet opening.
2. The garbage power grid-connected and security power system as claimed in claim 1, wherein: each garbage power station comprises a generator set and a power station bus, wherein the generator set is connected with the power station bus through a switch cabinet, and the power station bus is connected with a booster station bus through a communication incoming line cabinet; the buses of each power station are sequentially connected in series through the isolating switch cabinet and the bus-bar switch cabinet.
3. The garbage power grid-connected and security power system as claimed in claim 2, wherein: and one of the garbage power stations is selected, and a power station bus is connected to a low-voltage power supply grid through a safety power connection incoming line cabinet.
4. The garbage power grid-connected and security power system as claimed in claim 1, wherein: when no faults exist in a booster station bus, a booster station and/or a 35KV power supply grid, 52P11 is switched off, and then a 1# power station and a 2# power station are put into grid connection; wherein, the No. 1 unit is connected in grid: when 52F1 cabinet is switched on, 52P12 can be switched on, and after the synchronization is found in the grid-connected cabinet 52G1 of the No. 1 generator set, the generated electricity is connected to a public grid-connected bus through 52F1 and 52P12 and then is sent to a power grid through a step-up transformer; ablation 52P12 loop: when one of the three of the 52F1 cabinet tripping, the 52P11 cabinet closing and the 52ML cabinet closing is about to occur, the 52P12 cabinet is opened; the grid-connected machine set No. 2 is connected with the grid-connected machine set, the grid-connected machine set No. 2 is connected with the grid-connected machine set No. 52, the grid-connected machine set No. 52 is connected with the grid-connected machine set No. 52, and the grid-connected machine set No. 52 is connected with the grid through the step-up transformer after the grid-connected machine set No. 52; ablation 52P2 loop: when one of the 52F2 cabinet tripping and the 52ML cabinet closing is about to occur, the 52P2 cabinet is opened.
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