CN118040626B - Combined tripping method and device for water-light complementary system protection device - Google Patents
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Abstract
The invention provides a combined tripping method and a device of a protection device of a water-light complementary system, which relate to the technical field of clean energy multi-energy complementation, wherein the water-light complementary system is formed by connecting a photovoltaic power station to a connecting transformer of a hydropower plant through a plurality of power transmission lines, a first circuit breaker arranged on a plurality of current collection lines connected with the photovoltaic power station, a second circuit breaker of a combined tripping photovoltaic power station arranged on each power transmission line and a third circuit breaker of the combined tripping power plant are connected through a protection pressing plate connecting sheet, and the method comprises the following steps: determining at least two target collecting lines to be tripped based on the power capacity limit of a target power transmission line with any fault in the plurality of power transmission lines; the first and second target circuit breakers corresponding to the power transmission lines are tripped out, and the third target circuit breaker corresponding to the power transmission line is marked on each item. Therefore, the safe and stable operation of the non-fault transmission line and the hydropower plant interconnection transformer is ensured, and the grid-connected capacity of the current collection line can be ensured to the greatest extent.
Description
Technical Field
The invention relates to the technical field of clean energy multi-energy complementation, in particular to a method and a device for combining tripping of a protection device of a water-light complementation system.
Background
In the related technology, when any power transmission line in the water-light complementary system is tripped abnormally, only a breaker of the abnormal power transmission line is tripped, but the transmission capacity of the rest power transmission lines exceeds the designed thermal stability limit, so that the safe operation of the power transmission lines and corresponding loads is threatened, and a more reliable tripping method of the protection device of the water-light complementary system is needed.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent.
Therefore, the first purpose of the invention is to provide a method for combining the protection device of the water-light complementary system, which not only ensures the safe and stable operation of the non-fault transmission line and the communication transformer of the hydropower plant, but also can maximally ensure the grid-connected capacity of the current collection line.
The second purpose of the invention is to provide a jump device of the water-light complementary system protection device.
A third object of the present invention is to propose an electronic device.
A fourth object of the present invention is to propose a non-transitory computer readable storage medium storing computer instructions.
To achieve the above object, an embodiment of the present invention provides a method for tripping a protection device of a water-light complementary system, wherein the water-light complementary system is formed by connecting a photovoltaic power station to a contact transformer of a hydropower plant through a plurality of power transmission lines, the photovoltaic power station is connected to a plurality of current collection lines, each current collection line is provided with a first circuit breaker, each power transmission line is provided with a second circuit breaker of the tripping photovoltaic power station and a third circuit breaker of the tripping power plant, and each first circuit breaker, each second circuit breaker and each third circuit breaker are connected through a protection pressing plate connecting piece, the method includes:
when any target transmission line of the plurality of transmission lines fails, determining at least two target collection lines to be tripped based on the power capacity limit according to the target transmission line;
and tripping the target first circuit breaker and the target second circuit breaker corresponding to the target power transmission line and the target third circuit breaker corresponding to each target power transmission line.
To achieve the above object, a second aspect of the present invention provides a trip device of a protection device of a water-light complementary system, wherein the water-light complementary system is formed by connecting a photovoltaic power station to a contact transformer of a hydropower plant through a plurality of power transmission lines, the photovoltaic power station is connected to a plurality of current collection lines, each current collection line is provided with a first circuit breaker, each power transmission line is provided with a second circuit breaker of the trip photovoltaic power station and a third circuit breaker of the trip power plant, and each first circuit breaker, each second circuit breaker and each third circuit breaker are connected through a protection pressure plate connecting sheet, the device comprises:
The determining module is used for determining at least two target power collection lines to be tripped on the basis of the power capacity limit according to the target power transmission line when any one of the plurality of power transmission lines fails;
And the tripping module is used for tripping the target first circuit breaker and the target second circuit breaker corresponding to the target power transmission line and the target third circuit breaker corresponding to each item of target power collection line.
To achieve the above object, an embodiment of a third aspect of the present invention provides an electronic device, including: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of the first aspect.
To achieve the above object, an embodiment of a fourth aspect of the present invention proposes a non-transitory computer-readable storage medium storing computer instructions for causing the computer to execute the method according to the first aspect.
The embodiment of the invention provides a combined tripping method, a device, electronic equipment and a storage medium of a protection device of a water-light complementary system, wherein the water-light complementary system is formed by connecting a photovoltaic power station to a hydropower station contact transformer through a plurality of power transmission lines, a first circuit breaker arranged on a plurality of power collection lines connected with the photovoltaic power station, a second circuit breaker arranged on each power transmission line and a third circuit breaker of a combined tripping photovoltaic power plant, and the two or more power collection lines are determined to be tripped based on the power capacity limit of a target power transmission line with any fault in the plurality of power transmission lines through a protection pressing plate connecting sheet; the first and second target circuit breakers corresponding to the power transmission lines are tripped out, and the third target circuit breaker corresponding to the power transmission line is marked on each item. Therefore, the safe and stable operation of the non-fault transmission line and the hydropower plant interconnection transformer is ensured, and the grid-connected capacity of the current collection line can be ensured to the greatest extent.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
Fig. 1 is a schematic flow chart of a method for jointly tripping a protection device of a water-light complementary system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a water-light complementary system protection device according to an embodiment of the present invention;
FIG. 3 is a schematic flow chart of a method for combining the protection devices of the water-light complementary system according to another embodiment of the present invention;
fig. 4 is a schematic structural diagram of a jump device of a protection device of a water-light complementary system according to an embodiment of the present invention.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
The technical scheme of the invention is to acquire, store, use, process and the like data, which all meet the relevant regulations of national laws and regulations.
The following describes a method and a device for combining tripping of a protection device of a water-light complementary system according to the embodiment of the invention with reference to the attached drawings.
Fig. 1 is a schematic flow chart of a method for tripping a protection device of a water-light complementary system according to an embodiment of the present invention, where a main wiring diagram of the protection device of the water-light complementary system is shown in fig. 2, specifically, the water-light complementary system is formed by connecting a photovoltaic power station to a hydropower plant interconnection transformer through a plurality of power transmission lines (a first power transmission line, a second power transmission line, an nth power transmission line), the photovoltaic power station is connected to a plurality of current collection lines (a first current collection line, a second current collection line, a third current collection line, an mth current collection line), each current collection line is provided with a third circuit breaker 23, each power transmission line is provided with a second circuit breaker 22 of the water-tripping photovoltaic power station and a first circuit breaker 21 of the water-tripping power station, each first circuit breaker, the second circuit breaker and the third circuit breaker are connected through a protection platen connection sheet (not shown in the figure), an input end of the hydropower plant interconnection transformer is further provided with a fourth circuit breaker 24, and an output of the hydropower plant interconnection transformer is connected to a plant system.
As shown in fig. 1, the method comprises the steps of:
Step 101, when any target transmission line in a plurality of transmission lines fails, determining at least two target collection lines to be tripped based on the power capacity limit according to the target transmission line.
Alternatively, the power transmission line may be laid by using a hybrid of an overhead steel-cored aluminum strand and a cable, specifically, the overhead steel-cored aluminum strand of the power transmission line may each use 240 square millimeter wires, and the two-end incoming and outgoing cable uses 500 square millimeters, but not limited thereto, and the embodiment is not particularly limited thereto.
In some embodiments, the target transmission line power capacity limit is determined based on a material parameter of the transmission line, a wire length of the transmission line, and a wire cross-sectional area.
Specifically, cables are adopted for entering and exiting from two ends of a hydropower plant and a photovoltaic power station, the cross section area of each cable is 500 square millimeters, the middle part of each cable is an overhead steel-cored aluminum stranded wire, and under the condition that the cross section area of each overhead steel-cored aluminum stranded wire is 240 square millimeters, the power capacity of each power transmission line design limit is 27MW, so that the transmission power of each power transmission line is ensured not to exceed 27MW when the power transmission lines normally run.
And 102, tripping the target first circuit breaker and the target second circuit breaker corresponding to the target power transmission line and the target third circuit breaker corresponding to each target power transmission line.
Optionally, the first circuit breaker of target, the second circuit breaker of target and the third circuit breaker of target are also connected through the protection clamp plate connection piece, based on protection clamp plate connection piece connection, realize the synchronous allies oneself with of first circuit breaker of target, second circuit breaker of target and third circuit breaker of target and jump, guarantee non-trouble transmission line and hydropower plant's contact transformer safe and stable operation.
Wherein, the protection pressing plate connecting sheet is directly connected into the tripping operation loop of the corresponding collecting circuit breaker.
The method for the jump-connection of the protection device of the water-light complementary system comprises the steps that a photovoltaic power station is connected to a hydropower plant contact transformer through a plurality of power transmission lines to form the water-light complementary system, a first circuit breaker arranged on a plurality of power collection lines connected with the photovoltaic power station, a second circuit breaker of the jump-connection photovoltaic power station arranged on each power transmission line and a third circuit breaker of the jump-connection power plant are connected through a protection pressing plate connecting sheet, and at least two target power collection lines needing to be jumped off are determined based on the power capacity limit of any fault target power transmission line in the plurality of power transmission lines; the first and second target circuit breakers corresponding to the power transmission lines are tripped out, and the third target circuit breaker corresponding to the power transmission line is marked on each item. Therefore, the safe and stable operation of the non-fault transmission line and the hydropower plant interconnection transformer is ensured, and the grid-connected capacity of the current collection line can be ensured to the greatest extent.
For clarity of explanation of the above embodiment, fig. 3 is a schematic flow chart of a jump method of another protection device for a water-light complementary system according to an embodiment of the present invention.
Step 301, when any one of the plurality of power transmission lines fails, setting a target power collection line with the smallest power transmission line power of the plurality of power collection lines as a combined-skip public line based on the condition that two target power collection lines need to be skipped according to the power capacity limit of the target power transmission line.
Optionally, when any one of the plurality of power transmission lines fails, based on determining that two target power collection lines need to be tripped according to the power capacity limit of the target power transmission line, when the power capacity limit of the target power transmission line is met, the target power collection line of any one of the plurality of power collection lines may be set as a jointly tripped public line.
The target current collecting circuit with the minimum power of the power transmission lines in the plurality of current collecting circuits is set as the combined-tripping public circuit, so that the grid-connected capacity of the current collecting circuit can be ensured to the greatest extent.
Step 302, using any one candidate collecting line except the target collecting line in the combined-jump public line and the collecting lines as two target collecting lines.
In some embodiments, the water-light complementary system is formed by connecting a photovoltaic power station to a hydropower plant communication transformer through three power transmission lines, and under the condition that the photovoltaic power station is connected with four current collection lines (22.05 MW, 17.8MW, 19.5MW and 18.55 MW), as only four current collection lines are provided, the possibility of repeated jump occurs when a jump mechanism is provided, meanwhile, a second current collection line (17.8 MW) is provided as a jump public line in consideration of different capacities of the current collection lines, and the second current collection line is jumped out for all three power transmission lines, and then the other three current collection lines are jumped. The specific jump design can be as follows: the first power transmission line jumps to the first and second current collecting lines; the second power transmission line jumps the second and third current collecting lines; and the third power transmission line jumps the second and the fourth current collecting lines.
And the candidate current collecting lines corresponding to different target power transmission lines are unique.
The method for connecting the protection device of the water-light complementary system comprises the steps that a photovoltaic power station is connected to a hydropower plant contact transformer through a plurality of power transmission lines to form the water-light complementary system, a first circuit breaker arranged on a plurality of power collection lines connected with the photovoltaic power station, a second circuit breaker of the connected photovoltaic power station arranged on each power transmission line and a third circuit breaker of the connected water power plant are connected through a protection pressing plate connecting sheet, when any one of the plurality of power transmission lines fails, the target power collection line with the minimum power transmission line power in the plurality of power collection lines is set to be a connected public line under the condition that two target power collection lines need to be disconnected according to the power capacity limit of the target power transmission line; taking any one candidate collecting circuit except the target collecting circuit in the combined-jump public circuit and the collecting circuits as two target collecting circuits; the first and second target circuit breakers corresponding to the power transmission lines are tripped out, and the third target circuit breaker corresponding to the power transmission line is marked on each item. Therefore, through the circuit breakers on the combined-tripping power transmission line and the current collecting line, the real-time transmission power of the non-fault power transmission line is ensured to safely and stably run below the design power, and the grid-connected capacity of the current collecting line can be ensured to the greatest extent.
In order to realize the embodiment, the invention also provides a jump device of the water-light complementary system protection device.
Fig. 4 is a schematic structural diagram of a jump device of a protection device of a water-light complementary system according to an embodiment of the present invention.
As shown in fig. 4, the trip device 40 of the water light complementary system protection device includes: a determination module 41, and a trip module 42.
The determining module is used for determining at least two target power collection lines to be tripped on the basis of the power capacity limit according to the target power transmission line when any one of the plurality of power transmission lines fails;
And the tripping module is used for tripping the target first circuit breaker and the target second circuit breaker corresponding to the target power transmission line and the target third circuit breaker corresponding to each item of target power collection line.
Further, in one possible implementation of the embodiment of the present invention, the target transmission line power capacity limit is determined based on a material parameter of the transmission line, a wire length of the transmission line, and a wire cross-sectional area.
Further, in one possible implementation manner of the embodiment of the present invention, the determining module is specifically configured to:
When any target power transmission line of the plurality of power transmission lines fails, setting a target power collection line with the minimum power transmission line power of the plurality of power collection lines as a combined-skip public line based on the condition that two target power collection lines need to be skipped according to the power capacity limit of the target power transmission line;
and taking any one candidate collecting circuit except the target collecting circuit in the combined-jump public circuit and the collecting circuits as two target collecting circuits.
Further, in one possible implementation manner of the embodiment of the present invention, candidate collector lines corresponding to different target power transmission lines are unique.
It should be noted that the foregoing explanation of the method embodiment is also applicable to the apparatus of this embodiment, and will not be repeated here.
The invention provides a combined tripping device of a protection device of a water-light complementary system, wherein the water-light complementary system is formed by connecting a photovoltaic power station to a hydropower plant connecting transformer through a plurality of power transmission lines, a first circuit breaker arranged on a plurality of current collection lines connected with the photovoltaic power station, a second circuit breaker of a combined tripping photovoltaic power station arranged on each power transmission line and a third circuit breaker of a combined tripping power plant are connected through a protection pressing plate connecting sheet, and at least two target current collection lines needing tripping are determined based on the power capacity limit of a target power transmission line with any fault in the plurality of power transmission lines; the first and second target circuit breakers corresponding to the power transmission lines are tripped out, and the third target circuit breaker corresponding to the power transmission line is marked on each item. Therefore, the safe and stable operation of the non-fault transmission line and the hydropower plant interconnection transformer is ensured, and the grid-connected capacity of the current collection line can be ensured to the greatest extent.
In order to achieve the above embodiment, the present invention further provides an electronic device, including:
at least one processor; and
A memory communicatively coupled to the at least one processor; wherein,
The memory stores instructions executable by the at least one processor to enable the at least one processor to perform the aforementioned method.
To achieve the above embodiments, the present invention also proposes a non-transitory computer-readable storage medium storing computer instructions for causing the computer to execute the aforementioned method.
In order to realize the above embodiments, the present invention also proposes a computer program product comprising a computer program which, when executed by a processor, implements a method according to the foregoing.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and additional implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order from that shown or discussed, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present invention.
Logic and/or steps represented in the flowcharts or otherwise described herein, e.g., a ordered listing of executable instructions for implementing logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). In addition, the computer readable medium may even be paper or other suitable medium on which the program is printed, as the program may be electronically captured, via, for instance, optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner, if necessary, and then stored in a computer memory.
It is to be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. As with the other embodiments, if implemented in hardware, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.
Those of ordinary skill in the art will appreciate that all or a portion of the steps carried out in the method of the above-described embodiments may be implemented by a program to instruct related hardware, where the program may be stored in a computer readable storage medium, and where the program, when executed, includes one or a combination of the steps of the method embodiments.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing module, or each unit may exist alone physically, or two or more units may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules. The integrated modules may also be stored in a computer readable storage medium if implemented in the form of software functional modules and sold or used as a stand-alone product.
The above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, or the like. While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (10)
1. The utility model provides a water light complementary system protection device's allies oneself with and jumps method, wherein, water light complementary system is by photovoltaic power plant inserts to hydropower plant's contact transformer through many transmission lines and forms, just photovoltaic power plant is connected with many collection lines, each collection line all is provided with the third circuit breaker, each be provided with the second circuit breaker of allies oneself with jumping photovoltaic power plant and allies oneself with the first circuit breaker of water power plant on the transmission line, each first circuit breaker, second circuit breaker, third circuit breaker pass through the protection clamp plate connection piece and connect, the method includes:
When any target transmission line in the plurality of transmission lines fails, determining at least two target collection lines to be tripped based on the power capacity limit according to the target transmission line;
and tripping the target first circuit breaker and the target second circuit breaker corresponding to the target power transmission line and the target third circuit breaker corresponding to each target power transmission line.
2. The method of claim 1, wherein the target transmission line power capacity limit is determined based on a material parameter of the transmission line, a wire length of the transmission line, and a wire cross-sectional area.
3. The method of claim 1, wherein the determining at least two target collector lines to trip when any one of the plurality of power transmission lines fails based on the target power transmission line power capacity limit, further comprises:
when any target power transmission line of the plurality of power transmission lines fails, setting a target power collection line with the minimum power transmission line power of the plurality of power collection lines as a combined-skip public line based on the condition that two target power collection lines need to be skipped according to the power capacity limit of the target power transmission line;
and taking any one candidate collecting circuit except the target collecting circuit in the combined-jump public circuit and the collecting circuits as two target collecting circuits.
4. A method according to claim 3, wherein the candidate collector lines corresponding to different target transmission lines are unique.
5. The utility model provides a water light complementary system protection device's allies oneself with device that jumps, wherein, water light complementary system is by photovoltaic power plant inserts to hydropower plant's contact transformer through many transmission lines and forms, just photovoltaic power plant is connected with many collection lines, each all be provided with the third circuit breaker on the collection line, each all be provided with the second circuit breaker of allies oneself with jumping photovoltaic power plant and allies oneself with the first circuit breaker of water power plant on the transmission line, each first circuit breaker, second circuit breaker, third circuit breaker pass through the protection clamp plate connection piece and connect, the device includes:
the determining module is used for determining at least two target power collecting lines to be tripped on the basis of the power capacity limit according to the target power transmission line when any one of the plurality of power transmission lines fails;
And the tripping module is used for tripping the target first circuit breaker and the target second circuit breaker corresponding to the target power transmission line and the target third circuit breaker corresponding to each item of target power collection line.
6. The apparatus of claim 5, wherein the target transmission line power capacity limit is determined based on a material parameter of the transmission line, a wire length of the transmission line, and a wire cross-sectional area.
7. The apparatus of claim 5, wherein the determining module is specifically configured to:
when any target power transmission line of the plurality of power transmission lines fails, setting a target power collection line with the minimum power transmission line power of the plurality of power collection lines as a combined-skip public line based on the condition that two target power collection lines need to be skipped according to the power capacity limit of the target power transmission line;
and taking any one candidate collecting circuit except the target collecting circuit in the combined-jump public circuit and the collecting circuits as two target collecting circuits.
8. The apparatus of claim 7, wherein the candidate collector lines corresponding to different target power transmission lines are unique.
9. An electronic device, comprising:
at least one processor; and
A memory communicatively coupled to the at least one processor; wherein,
The memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of any one of claims 1-4.
10. A non-transitory computer readable storage medium storing computer instructions for causing the computer to perform the method of any one of claims 1-4.
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| CN104092193A (en) * | 2014-07-11 | 2014-10-08 | 国家电网公司 | 10kV power distribution network mixed line fault processing method |
| CN110244181A (en) * | 2019-06-26 | 2019-09-17 | 中国电力工程顾问集团中南电力设计院有限公司 | Marine wind electric field collection electric line sea cable electric fault localization method and its device |
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