CN113193552B - Power grid wiring method suitable for point-to-point electric energy transmission mode - Google Patents
Power grid wiring method suitable for point-to-point electric energy transmission mode Download PDFInfo
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- CN113193552B CN113193552B CN202110464575.9A CN202110464575A CN113193552B CN 113193552 B CN113193552 B CN 113193552B CN 202110464575 A CN202110464575 A CN 202110464575A CN 113193552 B CN113193552 B CN 113193552B
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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
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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
- H02J3/46—Controlling of the sharing of output between the 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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00016—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus
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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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00022—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using wireless data transmission
- H02J13/00026—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using wireless data transmission involving a local wireless network, e.g. Wi-Fi, ZigBee or Bluetooth
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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
- H02J3/381—Dispersed generators
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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
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/10—Power transmission or distribution systems management focussing at grid-level, e.g. load flow analysis, node profile computation, meshed network optimisation, active network management or spinning reserve management
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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
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
Abstract
The invention discloses a power grid wiring method suitable for a point-to-point electric energy transmission mode, wherein when a power grid is established, users are connected by a topological structure of a random network, each user is a node in the random network, and a cable for connecting the users is an edge in the random network; each user can be connected with 1 to d users, namely the degree of nodes in the network is 1 to d; in the process of network construction, two users with the closest connection distance are preferentially connected by cables, namely two users with the shortest cables are connected. Aiming at the mode of point-to-point transmission of electric energy in a certain range, the invention designs a novel power grid wiring method. On the premise of not increasing the cost too much, the wiring of the power grid is more suitable for point-to-point power transmission in a manner similar to data routing in the Internet, meanwhile, the reliability of the power grid is improved, the loss in the power transmission process is reduced, and the load on the key path of the power grid during the peak period of power utilization is reduced.
Description
Technical Field
The invention relates to the fields of electric energy transmission among users, electric energy routing, power grid wiring, utilization of distributed renewable energy sources and the like, in particular to a power grid wiring method suitable for a point-to-point electric energy transmission mode.
Background
With the popularization of distributed renewable energy power generation devices (such as photovoltaic power generation panels, small-sized wind power generators, fuel cells and the like), traditional electricity-consuming users gradually change into 'production and consumption' (both production and consumption) users. The production and consumption type users who install the distributed renewable energy power generation device can purchase power when the generated energy of the users cannot meet the power consumption requirements of the users, and can sell the residual electric energy to other traditional power consumption type users or production and consumption type users who need to purchase power when the generated energy exceeds the power consumption requirements of the users, namely, the production and consumption type users have double identities of the supply and the demand of the electric energy (see fig. 1). In the power market, under the background of the innovation of the user side, the mode of point-to-point power transmission and transaction between users of 'self-use, user-to-user transaction' is gradually attracting attention. The mode fully mobilizes the enthusiasm of users for installing the distributed renewable energy power generation device, and improves the use efficiency and the coverage rate of the distributed renewable energy.
The traditional grid wiring is a Radial network structure (see fig. 2) designed to accommodate a mode of concentrating power transmission from top to bottom to users. In the point-to-point power transmission mode, the conventional radial network structure mainly has the following disadvantages: (1) the average path of point-to-point transmission between users is longer, such as the transmission path of a → B in fig. 2, thereby increasing the loss in power transmission; (2) faults occurring on critical paths of the network may affect multiple subscribers or even subscribers in the entire area, such as the EF line in fig. 2; (3) the load on the critical path of the network is large, such as the EF line in fig. 2.
Disclosure of Invention
In view of the above problems in the background, the present invention provides a power grid wiring method suitable for a point-to-point power transmission mode, which is based on a Random Graph (Random Graph). The invention has the advantages of reducing the average path length of point-to-point electric energy transmission, thereby reducing the loss of electric energy transmission, improving the reliability of a power grid and reducing the load of the power grid.
In order to achieve the purpose, the invention provides a power grid wiring method suitable for a point-to-point electric energy transmission mode, and the following technical scheme is provided: when a power grid is constructed, users are connected by a topological structure of a random network, each user is a Node in the random network, and a cable connecting the users is an Edge (Edge or Arc) in the random network. Each user can be connected to 1 to d users, i.e. the degree of the nodes in the network is 1 to d (see fig. 3). Two users can be connected by 1 cable (unidirectional network, bidirectional transmission of electric energy can be realized at different times, but unidirectional transmission of electric energy can be realized at the same time), or 2 cables (bidirectional network, bidirectional transmission of electric energy can be realized at any time). Theoretically, the higher the value of the degree of a node in the network, i.e., the more edges in the network, the higher the transmission efficiency of electric energy. But more edges in the network means more cables connecting the subscribers and higher construction costs. Considering the balance between the construction cost and the power transmission efficiency, according to the experimental result of fig. 4, it is recommended that the maximum value of the degrees of the nodes in the network should not exceed 8. In addition, during the network construction process, two users with the closest connection distance are preferentially connected by cables, namely, two users with the shortest connection cable are preferentially connected. The number of nodes in the network is set as N, the maximum value of the degree of the nodes in the network is set as D, and the method comprises the following steps:
for networkEach node n in (1) i Performing the following operations:
(1) find and node n i D nodes with the nearest distance are connected, and the nodes are sorted from small to large according to the connection distance to form a set | L |.
(2) Randomly generating an integer M, wherein M is less than or equal to D.
(3) For the first M nodes in | L |, each node n is examined separately j Whether or not to already communicate with node n i Is there connected? Connecting them if they have not already been connected; if they are already connected, skip node n j The next node in | L | continues to be examined until all nodes in | L | have been examined.
(4) When all the nodes in the network execute the above operations, the process is terminated.
The invention has the technical effects and advantages that: the average path length of point-to-point electric energy transmission can be reduced, so that the electric energy transmission loss is reduced, the reliability of a power grid can be improved, and the load of the power grid is reduced.
Drawings
Fig. 1 is a point-to-point power transmission and transaction mode between users in a "self-service, user-to-user transaction" context.
Fig. 2 is a power grid network structure based on a conventional Radial (Radial) topology, which is suitable for a top-down centralized power transmission mode.
Fig. 3 is an example of a power grid network structure suitable for a point-to-point power transmission mode based on a Random Graph (Random Graph) topology.
Fig. 4 is a graph of the effect of the degree of nodes in a stochastic network on the performance of power transfer in a power grid.
Fig. 5 is an example of power router based grid wiring.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a technical scheme that: a power grid wiring method suitable for a point-to-point power transmission mode comprises the step of carrying out cable wiring in a specific network topology structure when a power grid for point-to-point power transmission is established, so that the point-to-point power transmission efficiency is improved, and the power transmission loss and the network transmission load are reduced.
In the scheme, each user installs a device capable of judging, distributing and forwarding electric energy, such as an electric energy router, which is described below by taking the electric energy router as an example. The power router is first coupled to the power management system (EMS) of subscriber a or directly as part of the power management system of subscriber a. In addition, the power router has a plurality of ports, each of which is connected to another subscriber other than the subscriber a, thereby forming a network for power transmission (see fig. 5). In the network, power is transmitted between users through power routers. When the electric energy router of the user A receives the electric energy transmitted from other users, the electric energy router judges which part of the electric energy is purchased by the user A and which part of the electric energy is transmitted to other users through the information transmitted synchronously. Then, the electric energy router transfers the part of the electric energy purchased by the user A to the electric energy management system of the user A, and the electric energy management system distributes the part of the electric energy to the electric appliances of the user A for use. Meanwhile, the power router forwards power that should be transmitted to other users to their destinations. If the electric energy router of the user A is directly connected with the electric energy router of the user B who purchases electric energy, the electric energy router of the user A directly forwards the part of electric energy purchased by the user B to the electric energy router of the user B. Otherwise, the electric energy router of the user a forwards the part of the electric energy purchased by the user B to the next node on the transmission path a → B, that is, the electric energy router of a certain user C, according to the topology structure of the network. This is repeated until power is forwarded to the power router of subscriber B.
Claims (6)
1. A power grid wiring method suitable for a point-to-point electric energy transmission mode is characterized by comprising the following steps: when a power grid is constructed, users are connected in a topological structure of a random network, each user is a node in the random network, and a cable connecting the users is an edge in the random network; each user can be connected with 1 to d users, namely the degree of nodes in the network is 1 to d; in the process of network construction, two users with the shortest connection distance are preferentially connected by cables, namely the two users with the shortest connection distance are connected;
the number of nodes in the network is set as N, the maximum value of the degree of the nodes in the network is set as D, and the method comprises the following steps: for each node n in the network i Performing the following operations:
(1) find and node n i D nodes with the nearest distance are connected, and the nodes are sequenced from small to large according to the connection distance to form a set | L |;
(2) randomly generating an integer M, wherein M is less than or equal to D;
(3) for the first M nodes in | L |, each node n is examined separately j Whether or not to already communicate with node n i Is there connected? Connecting them if they have not already been connected; if they are already connected, skip node n j Continuously checking the next node in the | L | until all nodes in the | L | are checked;
(4) when all the nodes in the network execute the above operations, the process is terminated.
2. The method of claim 1, wherein the method comprises the following steps: two users can be connected by 1 cable, namely, the network is not available, the electric energy can be transmitted in two directions at different moments, but the electric energy can be transmitted in one direction at the same moment.
3. The method of claim 1, wherein the method comprises the following steps: two users can be connected by 2 cables, namely a bidirectional network, and electric energy can be transmitted in a bidirectional mode at any time.
4. The method of claim 1, wherein the method comprises the following steps: the maximum value of the degree of the nodes in the network does not exceed 8.
5. The method of claim 1, wherein the method comprises the following steps: each subscriber installs a device capable of determining, distributing, and forwarding power, including but not limited to a power router.
6. The method of claim 5, wherein the method comprises the following steps: the power router is first coupled to the power management system of the customer or directly as part of the power management system of the customer.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110464575.9A CN113193552B (en) | 2021-04-28 | 2021-04-28 | Power grid wiring method suitable for point-to-point electric energy transmission mode |
| NL2031630A NL2031630B1 (en) | 2021-04-28 | 2022-04-19 | Power grid wiring method applicable to peer-to-peer power delivery mode |
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| CN202110464575.9A CN113193552B (en) | 2021-04-28 | 2021-04-28 | Power grid wiring method suitable for point-to-point electric energy transmission mode |
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| CN113193552A CN113193552A (en) | 2021-07-30 |
| CN113193552B true CN113193552B (en) | 2022-09-27 |
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| US7571411B2 (en) * | 2006-01-12 | 2009-08-04 | International Business Machines Corporation | Methods and apparatus for providing flexible timing-driven routing trees |
| CN204794125U (en) * | 2015-06-23 | 2015-11-18 | 国家电网公司 | Novel mutual networking systems of framework energy |
| CN107506854B (en) * | 2017-08-04 | 2021-04-20 | 国网浙江省电力公司经济技术研究院 | 220kV power grid structure planning method considering differentiation scene |
| CN108599141B (en) * | 2018-02-05 | 2021-04-27 | 西交利物浦大学 | Rapid dynamic self-adaptive identification method for multi-energy local area network |
| CN108681786B (en) * | 2018-04-24 | 2021-11-09 | 西交利物浦大学 | Distributed power generation site selection planning method based on power supply community structure |
| CN109936136B (en) * | 2019-04-24 | 2023-01-31 | 广东电网有限责任公司 | Method, device and equipment for planning distribution network wiring line |
| CN110210659B (en) * | 2019-05-24 | 2021-04-02 | 清华大学 | Power distribution network planning method considering reliability constraint |
| CN112052544B (en) * | 2020-08-13 | 2023-09-29 | 明阳智慧能源集团股份公司 | Wind farm collecting network design method, system, storage medium and computing equipment |
| CN112421607A (en) * | 2020-09-23 | 2021-02-26 | 国网浙江省电力有限公司绍兴供电公司 | Transformer substation anti-misoperation system and method based on topology analysis |
| CN112217202B (en) * | 2020-09-29 | 2022-06-14 | 东南大学 | Distributed new energy, energy storage and power distribution network planning method considering flexibility investment |
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| NL2031630A (en) | 2022-11-04 |
| NL2031630B1 (en) | 2024-01-04 |
| CN113193552A (en) | 2021-07-30 |
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