CN113964873A - 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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- CN113964873A CN113964873A CN202111420063.9A CN202111420063A CN113964873A CN 113964873 A CN113964873 A CN 113964873A CN 202111420063 A CN202111420063 A CN 202111420063A CN 113964873 A CN113964873 A CN 113964873A
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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
Abstract
The invention discloses a garbage power grid-connection and security power supply system which comprises a plurality of garbage power stations, a booster station bus, a booster transformer and a 35KV power supply grid, wherein each garbage power station is connected to the booster station bus through a power station connection incoming line cabinet, and the booster station bus is connected to 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 connection incoming line cabinet of each garbage power station. The invention has the advantages that: the safe and reliable grid-connected system is provided 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 safe and automatic functions are embodied on the aspect of operation management, and the popularization prospect is good; the interlock is arranged, so that the interlock is arranged between the safety power switch cabinet and the input of the related switch connected with the grid, 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 urbanization construction in China, urban garbage is gradually increased, the annual garbage production amount is hundreds of millions of tons, and the city surrounded by garbage becomes a global trend. In China, which is currently in high-speed development, the problem of 'refuse surrounding city' is encountered. Aiming at the problem, the municipal refuse needs to be reasonably treated, so that the environmental pollution is reduced, and the method is imperative. In recent years, the development of domestic waste incineration power generation technology is fast, and the popularization and the application of waste incineration power generation have positive significance for urban waste treatment. Along with the gradual localization and standardization development of domestic waste incineration treatment, the urban waste is increasing day by day, and the waste incineration power generation technology is absolutely necessary and has considerable prospect. In the prior art, a mode that one generator set generates power but the generator set generates power by burning garbage cannot meet the requirements of users, while a power supply mode of two or more generator sets is not disclosed in documents, and the problem that how to realize and guarantee multi-loop grid connection of the multiple generator sets under the conditions of maintenance and the like needs to be considered and solved, and no related solution exists in the prior art.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a garbage power grid-connection and security power supply system, which solves the problem of multi-loop grid connection of more than two generator sets based on the power supply modes of two or more generator sets, increases security power supply loops, ensures safe and stable operation of the generator sets, provides reference for subsequent multiple power supply grid connection and interlocking protection, and realizes the reliability, safety and economy of a power supply network.
In order to achieve the purpose, the invention adopts the technical scheme that: a garbage power generation grid-connection and security power supply system comprises a plurality of garbage power stations, a booster station bus, a booster transformer and a 35KV power supply grid, wherein each garbage power station is connected to the booster station bus through a power station interconnection incoming cabinet, and the booster station bus is connected to 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 connection 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 to the power station bus through a switch cabinet, and the power station bus is connected to the booster station bus through a communication incoming line cabinet; buses of each power station are sequentially connected in series through an isolation switch cabinet and a bus-coupled switch cabinet.
And (4) selecting one of the garbage power stations, and connecting the bus of the garbage power station into a low-voltage power supply grid through a security power supply interconnection incoming cabinet.
Setting interlocking control on a security power supply interconnection incoming line cabinet, a power station interconnection incoming line cabinet and a bus-bar switch cabinet to control the opening and closing of the security power supply interconnection incoming line cabinet, the power station interconnection incoming line cabinet and the bus-bar switch cabinet; the interlocking control is interlocked through relay contacts in each switch cabinet.
The number of the garbage power stations is two, and the two garbage power stations are respectively a 1# power station and a 2# power station; a generating station bus of the No. 1 generating station is connected to a low-voltage power supply grid through a security power supply interconnection incoming line cabinet; a power station bus of the No. 1 power station is connected with the inlet wire cabinet through 52P12, and then the inlet wire cabinet 52F1 connected with the booster station bus is connected to the booster station bus; a power station bus of the No. 1 power station is connected to a power station bus of the No. 2 power station after passing through an isolation switch cabinet 52GL and a bus switch cabinet 52 ML; a power station bus of the 2# power station is connected with the inlet wire cabinet and the booster station bus inlet wire cabinet 52F2 through 52P2 and then is connected to the booster station bus.
The security power supply interconnection incoming line cabinet 52P11 is put into use when a bus of the booster station, the booster station and/or a 35KV power supply grid fails; an interlocking system is arranged between the emergency power supply interconnection inlet cabinet 52P11 and the bus-bar switch cabinet 52ML, the interconnection inlet cabinet 52P12 and the interconnection inlet cabinet 52P2, and the interlocking relationship is as follows: when the 52ML cabinet is in the open position and the 52P12 cabinet is in the open 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, the 52P11 cabinet allows closing; when 52ML cabinet is open position and 52P12 cabinet is closed position; or the 52ML cabinet is in the on position, and the 52P11 cabinet is in the off position when the 52P12 cabinet or the 52P2 cabinet is in any on position.
When the bus of the booster station, the booster station and/or the 35KV power supply grid has no fault, the 52P11 is switched off, and then the power station is put into a No. 1 power station and a No. 2 power station for grid connection; wherein, 1# unit is incorporated into the power networks: the 52ML cabinet and the 52P11 cabinet are switched off, when the 52F1 cabinet is switched on, the 52P12 can be switched on, and after the 1# generating set grid-connected cabinet 52G1 finds out the synchronization, the generated electricity is accessed to a public grid-connected bus through the 52F1 and the 52P12 and then is sent to a power grid through a step-up transformer; cut 52P12 loop: when one of the 52F1 cabinet tripping, the 52P11 cabinet closing and the 52ML cabinet closing is about to occur, the 52P12 cabinet opens; when the 2# generator set is connected to the grid, the 52ML cabinet is in a switch-off position, and the 52F2 cabinet is switched on, the 52P2 can be switched on, so that the 52G2 of the 2# generator set grid-connected cabinet accesses a public grid-connected bus through the 52F2 and 52P12 as well as the 52F2 and 52P2 cabinets after finding the same period, and the bus is sent to a power grid through a step-up transformer; cut 52P2 loop: when one of the 52F2 cabinet tripping and the 52ML cabinet closing occurs, the 52P2 cabinet is opened.
The invention has the advantages that: the safe and reliable grid-connected system is provided 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 safe and automatic functions are embodied on the aspect of operation management, and the popularization prospect is good; the interlock is arranged, so that the interlock is arranged between the safety power switch cabinet and the input of the related switch connected with the grid, and the safety and reliability of the input are ensured.
Drawings
The contents of the expressions in the various figures of the present specification and the labels in the figures are briefly described as follows:
FIG. 1 is an electrical schematic of the system of the present invention;
FIG. 2 is an electrical schematic of the system wiring 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 52P11 switch cabinet of the present invention;
fig. 5 is an interlocking relationship diagram of the 52P2 switch cabinet of the invention.
Detailed Description
The following description of preferred embodiments of the invention will be made in further detail with reference to the accompanying drawings.
The application mainly aims at the implementation scheme of grid connection and maintenance design of the garbage power plant. Firstly, the plants of the power plant are generally in the first period, the second period or the third period, the fourth period and the fifth period, the generating power in each period is the same or different, the 10KV power grid can be directly connected to the power grid, but when the power plants in multiple periods generate electricity, the generating power is large, the direct connection cannot be realized, the electrical scheme of the plants connected to the power grid in each period needs to be designed, how to realize maintenance is also considered, and the safe and reliable operation is ensured by considering the interlocking logic of the connected power grid, therefore, the system of the application is specifically designed as follows:
a garbage power generation grid-connection and security power supply system comprises a plurality of garbage power stations, a booster station bus, a booster transformer and a 35KV power supply grid, wherein each garbage power station is connected to the booster station bus through a power station connection incoming cabinet, and the booster station bus is connected to 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 connection incoming line cabinet of each garbage power station. The plurality of 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 ensure that the generated power is large and the garbage power stations cannot be directly connected to the grid, a booster station bus is arranged for boosting the generated power of each power station and transmitting the boosted power to a 35KV power grid so as to realize the grid connection of the plurality of power stations, and the grid connection can be realized by controlling each switch cabinet.
Each garbage power station comprises a generator set and a power station bus, wherein the generator set is connected to the power station bus through a switch cabinet, and the power station bus is connected to the booster station bus through a communication incoming line cabinet; buses of each power station are sequentially connected in series through an isolation switch cabinet and a bus-coupled switch cabinet. And (4) selecting one of the garbage power stations, and connecting the bus of the garbage power station into a low-voltage power supply grid through a security power supply interconnection incoming cabinet. In order to realize convenient maintenance or normal grid connection of power generation of a power station during 35KV fault and maintenance, a security power supply is arranged, and a power grid is connected into a 10KV relatively low-voltage power grid in a mode that the security power supply is connected with a wire inlet cabinet.
In order to ensure safety and realize control on grid connection and security power supply input, so that reliable control on the grid connection and security power supply connection incoming line cabinet is realized, and interlocking control is set for the security power supply connection incoming line cabinet, the power station connection incoming line cabinet and the bus connection switch cabinet to control the on-off of the security power supply connection incoming line cabinet, the power station connection incoming line cabinet and the bus connection switch cabinet; the interlocking control sets interlocking through the relay contacts in each switch cabinet, and realizes the interlocking of switching on and switching off between the switch cabinets through the setting of the normally open contacts and the normally closed contacts of the relays in the switch cabinets, thereby avoiding the safety accidents of switching on and switching off and ensuring the safe operation of grid connection.
The present application will be described by taking two garbage power stations as an example, as shown in fig. 1 and 2, which are a 1# power station and a 2# power station, respectively; namely 1# generator, 2# generator and their corresponding transformer of various power stations in the figure.
The wiring schematic diagram is shown in fig. 1 and 2, a power station bus of a 1# power station is connected to a 10KV low-voltage power supply grid through a security power supply interconnection incoming line cabinet 52P 11; a power station bus of the No. 1 power station is connected with the inlet wire cabinet through 52P12, and then the inlet wire cabinet 52F1 connected with the booster station bus is connected to the booster station bus; a power station bus of the No. 1 power station is connected to a power station bus of the No. 2 power station after passing through an isolation switch cabinet 52GL and a bus switch cabinet 52 ML; a power station bus of the 2# power station is connected with the inlet wire cabinet and the booster station bus inlet wire cabinet 52F2 through 52P2 and then is connected to the booster station bus.
The security power supply interconnection incoming line cabinet 52P11 is put into use when the bus of the booster station, the booster station and/or the 35KV power supply grid fails; an interlocking system is arranged between the emergency power supply interconnection inlet cabinet 52P11 and the bus-bar switch cabinet 52ML, the interconnection inlet cabinet 52P12 and the interconnection inlet cabinet 52P2, and the interlocking relationship is as follows: when the 52ML cabinet is in the open position and the 52P12 cabinet is in the open 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, the 52P11 cabinet allows closing; when 52ML cabinet is open position and 52P12 cabinet is closed position; or the 52ML cabinet is in the on position, and the 52P11 cabinet is in the off position when the 52P12 cabinet or the 52P2 cabinet is in any on position. Therefore, the power generation of the power station can be directly connected to 10KV in the process of maintenance, and the continuous and effective operation of power generation is ensured; and the maintenance can not be delayed, so that the continuous effective power generation and safe and reliable operation of the grid connection of the system are ensured.
When the bus of the booster station, the booster station and/or the 35KV power supply grid has no fault, the 52P11 is switched off, and then the power station is put into a No. 1 power station and a No. 2 power station for grid connection; wherein, 1# unit is incorporated into the power networks: the 52ML cabinet and the 52P11 cabinet are switched off, when the 52F1 cabinet is switched on, the 52P12 can be switched on, and after the 1# generating set grid-connected cabinet 52G1 finds out the synchronization, the generated electricity is accessed to a public grid-connected bus through the 52F1 and the 52P12 and then is sent to a power grid through a step-up transformer; cut 52P12 loop: when one of the 52F1 cabinet tripping, the 52P11 cabinet closing and the 52ML cabinet closing is about to occur, the 52P12 cabinet opens; when the 2# generator set is connected to the grid, the 52ML cabinet is in a switch-off position, and the 52F2 cabinet is switched on, the 52P2 can be switched on, so that the 52G2 of the 2# generator set grid-connected cabinet accesses a public grid-connected bus through the 52F2 and 52P12 as well as the 52F2 and 52P2 cabinets after finding the same period, and the bus is sent to a power grid through a step-up transformer; cut 52P2 loop: when one of the 52F2 cabinet tripping and the 52ML cabinet closing occurs, the 52P2 cabinet is opened. The interlocking relation among the switch cabinets is set to ensure that the system is safely and reliably merged into the power grid, so that the conflict between power stations directly merged into the power grid is avoided, and the safe and reliable operation of the system is ensured.
The power supply system solves the problem of multi-loop grid connection of more than two generator sets based on the power supply modes of two or more generator sets, increases a security power supply loop, ensures safe and stable operation of the generator sets, provides reference for subsequent multi-power grid connection and interlocking protection, and realizes reliability, safety and economy of a power supply network.
As shown in fig. 1 and 2, a common grid-connected bus is designed to solve the grid-connected problem of two units. The garbage power plant 2 x 6MW generator set runs in a row, a 10kV bus connection section is specially arranged in a booster station, and the two generator sets are respectively connected into the 10kV bus connection section specially arranged in the booster station.
The design of the security power supply ensures that the operation and the maintenance of the unit are more reliable. If the 10/35kV booster station or the 35kV line breaks down, a security power supply loop is put into the booster station, so that the safe maintenance and temporary power generation grid connection of the two sets of generator sets can be guaranteed.
The problem of the interlocking of two sets of garbage power generation grid-connected and security power supply is solved, and the interlocking schematic diagram is shown in figures 3, 4 and 5:
case 1: under the condition of no electricity such as 10/35kV booster station or 35kV line failure, a security power supply circuit is put into operation: 52ML cabinet open position and 52P12 cabinet open position; or 52ML cabinet switch-on position, 52P12 cabinet switch-off position and 52P2 cabinet switch-off position, the safety power circuit, namely 52P11 cabinet switch-on can be put into. Cutting off a security power supply loop: 2ML cabinet open position and 52P12 cabinet closed position; or 52ML cabinet on-off position, and 52P12 cabinet 52P2 cabinet can cut off the safety power circuit, namely 52P11 cabinet off-off, as long as there is one on-off position.
Case 2: under the normal condition of an 10/35kV booster station, a 1# unit is connected to the grid. The 52ML cabinet and the 52P11 cabinet are switched off, when the 52F1 cabinet is switched on, the 52P12 can be switched on, so that the 1# generating set grid-connected cabinet 52G1 finds out the synchronization, the generated electricity is connected to a public grid-connected bus through the 52F1 and the 52P12, and then the electricity is sent to a power grid through a step-up transformer. Cut 52P12 loop: when one of the three, namely the tripping of the 52F1 cabinet, the closing of the 52P11 cabinet and the closing of the 52ML cabinet, the 52P12 cabinet is opened.
Case 3: under the normal condition of an 10/35kV booster station, a 2# unit is connected to the grid. The 52ML cabinet is in a switch-off position, when the 52F2 cabinet is switched on, the 52P2 cabinet can be switched on, so that the 2# generating set grid-connected cabinet 52G2 is connected to a public grid-connected bus through the 52F2, the 52P12, the 52F2 and the 52P2 cabinet after the synchronization is found, and the public grid-connected bus is sent to a power grid through a booster transformer. Cut 52P2 loop: when one of the 52F2 cabinet tripping and the 52ML cabinet closing occurs, the 52P2 cabinet is opened. The interlocking relation solves the interlocking problem of the two garbage power generating units in grid connection and a security power supply, and ensures the safe and stable operation of the units.
The power generation grid-connected and security power supply system meets the requirements of safe operation and maintenance after being applied in the application places, embodies the functions of safety and automation in operation management, and has good popularization prospect. After the scheme is implemented, the two generator set power supply grid-connected systems of the project are safe and reliable to operate, the power generation can provide 9120 ten thousand kW per hour of electric quantity for the society every year, the electricity cost is reduced to 5928 ten thousand yuan every year, and 20 ten thousand tons of domestic garbage are treated every year. Great benefits are made for the development of national economy and society.
It is clear that the specific implementation of the invention is not restricted to the above-described embodiments, but that various insubstantial modifications of the inventive process concept and technical solutions are within the scope of protection of the invention.
Claims (7)
1. A garbage power grid-connected and security power supply system is characterized in that: the system comprises a plurality of garbage power stations, a booster station bus, a booster transformer and a 35KV power supply grid, wherein each garbage power station is connected to the booster station bus through a power station interconnection incoming line cabinet, and the booster station bus is connected to 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 connection incoming line cabinet of each garbage power station.
2. The grid-connected and security power supply system for garbage power generation 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 to the power station bus through a switch cabinet, and the power station bus is connected to the booster station bus through a communication incoming line cabinet; buses of each power station are sequentially connected in series through an isolation switch cabinet and a bus-coupled switch cabinet.
3. The grid-connected and security power supply system for garbage power generation as claimed in claim 2, wherein: and (4) selecting one of the garbage power stations, and connecting the bus of the garbage power station into a low-voltage power supply grid through a security power supply interconnection incoming cabinet.
4. The grid-connected and security power supply system for garbage power generation as claimed in any one of claims 1 to 3, characterized in that: setting interlocking control on a security power supply interconnection incoming line cabinet, a power station interconnection incoming line cabinet and a bus-bar switch cabinet to control the opening and closing of the security power supply interconnection incoming line cabinet, the power station interconnection incoming line cabinet and the bus-bar switch cabinet; the interlocking control is interlocked through relay contacts in each switch cabinet.
5. The grid-connected and security power supply system for garbage power generation as claimed in claim 4, wherein: the number of the garbage power stations is two, and the two garbage power stations are respectively a 1# power station and a 2# power station; a generating station bus of the No. 1 generating station is connected to a low-voltage power supply grid through a security power supply interconnection incoming line cabinet; a power station bus of the No. 1 power station is connected with the inlet wire cabinet through 52P12, and then the inlet wire cabinet 52F1 connected with the booster station bus is connected to the booster station bus; a power station bus of the No. 1 power station is connected to a power station bus of the No. 2 power station after passing through an isolation switch cabinet 52GL and a bus switch cabinet 52 ML; a power station bus of the 2# power station is connected with the inlet wire cabinet and the booster station bus inlet wire cabinet 52F2 through 52P2 and then is connected to the booster station bus.
6. The grid-connected and security power supply system for garbage power generation as claimed in claim 5, wherein: the security power supply interconnection incoming line cabinet 52P11 is put into use when a bus of the booster station, the booster station and/or a 35KV power supply grid fails; an interlocking system is arranged between the emergency power supply interconnection inlet cabinet 52P11 and the bus-bar switch cabinet 52ML, the interconnection inlet cabinet 52P12 and the interconnection inlet cabinet 52P2, and the interlocking relationship is as follows: when the 52ML cabinet is in the open position and the 52P12 cabinet is in the open 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, the 52P11 cabinet allows closing; when 52ML cabinet is open position and 52P12 cabinet is closed position; or the 52ML cabinet is in the on position, and the 52P11 cabinet is in the off position when the 52P12 cabinet or the 52P2 cabinet is in any on position.
7. The grid-connected and security power supply system for garbage power generation as claimed in claim 6, wherein: when the bus of the booster station, the booster station and/or the 35KV power supply grid has no fault, the 52P11 is switched off, and then the power station is put into a No. 1 power station and a No. 2 power station for grid connection; wherein, 1# unit is incorporated into the power networks: the 52ML cabinet and the 52P11 cabinet are switched off, when the 52F1 cabinet is switched on, the 52P12 can be switched on, and after the 1# generating set grid-connected cabinet 52G1 finds out the synchronization, the generated electricity is accessed to a public grid-connected bus through the 52F1 and the 52P12 and then is sent to a power grid through a step-up transformer; cut 52P12 loop: when one of the 52F1 cabinet tripping, the 52P11 cabinet closing and the 52ML cabinet closing is about to occur, the 52P12 cabinet opens; when the 2# generator set is connected to the grid, the 52ML cabinet is in a switch-off position, and the 52F2 cabinet is switched on, the 52P2 can be switched on, so that the 52G2 of the 2# generator set grid-connected cabinet accesses a public grid-connected bus through the 52F2 and 52P12 as well as the 52F2 and 52P2 cabinets after finding the same period, and the bus is sent to a power grid through a step-up transformer; cut 52P2 loop: when one of the 52F2 cabinet tripping and the 52ML cabinet closing occurs, the 52P2 cabinet is opened.
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| CN202111420063.9A CN113964873A (en) | 2021-11-26 | 2021-11-26 | Garbage power generation grid-connected and security power supply system |
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