NL2031630A - Power grid wiring method applicable to peer-to-peer power delivery mode - Google Patents

Power grid wiring method applicable to peer-to-peer power delivery mode Download PDF

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Publication number
NL2031630A
NL2031630A NL2031630A NL2031630A NL2031630A NL 2031630 A NL2031630 A NL 2031630A NL 2031630 A NL2031630 A NL 2031630A NL 2031630 A NL2031630 A NL 2031630A NL 2031630 A NL2031630 A NL 2031630A
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peer
power
nodes
users
graph
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NL2031630A
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Dutch (nl)
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NL2031630B1 (en
Inventor
Zang Xiaolin
Sha Ang
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Univ Qingdao Technology
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Classifications

    • 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
    • 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
    • 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
    • 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
    • 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
    • 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
    • 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 applicable to a peer—to—peer power delivery mode. When. a power grid is constructed, users are connected by a topology of a random graph; each user is one node in the random. graph, and, a cable for 5 connecting the users is an edge in the random graph; each user can be connected to l to d users, that is, the degree of nodes in the graph is l to d; in the graph construction process, two users with a closest connection distance are preferentially connected by a cable, that is, two users using the shortest cable are connected. 10 The invention designs a new power grid wiring method for the peer— to—peer power delivery mode within a certain range. Without increasing the cost too much, the power grid wiring is more suitable for peer—to—peer power delivery in a Hanner similar to data routing in an Internet. 15 (+ Fig.)

Description

POWER GRID WIRING METHOD APPLICABLE TO PEER-TO-PEER POWER DELIVERY MODE
TECHNICAL FIELD The present invention relates to the field of power delivery between users, power routing, power grid wiring, utilization of distributed renewable energy source, specifically to a power grid wiring method applicable to a peer-to-peer power delivery mode.
BACKGROUND ART With the popularization of distributed renewable energy gen- erators (such as a photovoltaic panel, a small-sized wind driven generator, and a fuel cell), traditional power-consuming users have gradually become "producing and consuming" users (i.e., users that produce and consume power). Producing and consuming users equipped with distributed renewable energy generators can not only purchase electricity when their own power generation amount cannot meet their power demand, but also can sell, when their power gen- eration amount exceeds their power demand, the remaining power to other traditional power-consuming users or producing and consuming users needing to purchase electricity. Those users have the dual identities capable of supplying power and demanding power (see FIG. 1). In the power market, under the background of user-side reformation, the peer-to-peer power delivery and transaction mode, i.e., "self-generating power for self-use, user-to-user transac- tion", between users is gradually attracting attention. This mode fully mobilizes users' enthusiasm for installing the distributed renewable energy generators, and improves the use efficiency and coverage scale of distributed renewable energy.
Traditional power grid wiring is of a radial network struc- ture (see FIG. 2), which is designed to adapt to a mode for inten- sively transmitting power to users from top to bottom. In the peer-to-peer power delivery mode, the traditional radial network structure mainly has the following disadvantages: (1) The average path of peer-to-peer delivery between users is longer, such as the delivery path AB in FIG. 2, which will also increase the loss in the power delivery; {2} a fault on a key path of the network will affect multiple users or even users in the entire area, such as an EF line in FIG. 2; and (3) the key path of the network is heavily loaded, such as the EF line in FIG. 2.
SUMMARY In view of the problems in the above background, the present invention "power grid wiring method applicable to a peer-to-peer power delivery mode" provides a power grid wiring method applica- ble to a peer-to-peer power delivery mode based on a random graph. The beneficial effects of the present invention are that the aver- age path length of peer-to-peer power delivery can be reduced, thereby reducing the loss of power delivery; and at the same time, the reliability of a power grid can be improved, and a load on the power grid can be reduced.
In order to achieve the above objective, the present inven- tion "power grid wiring method applicable to a peer-to-peer power delivery mode" provides the following technical solution: when a power grid is constructed, users are connected by the topology of a random graph. Each user is one node in the random graph, and a cable for connecting the users is an edge or arc in the random graph. Each user can be connected to 1 to d users, that is, the degree of nodes in the graph is 1 to d (see FIG. 3). Two users can be connected by one cable (an undirected network, which can trans- mit power in both directions at different times, but can only transmit power in one direction at the same time), or two users can be connected by two cables (a two-way network, which can transmit power in both directions at any time). Theoretically, if the value of the degree of the nodes in the graph is higher, that is, the number of edges in the graph is larger, the power delivery efficiency is higher. However, multiple edges in the graph mean that there are more cables for connecting the users and the con- struction cost is higher. Considering the balance between the con- struction cost and the power delivery efficiency, it is recommend- ed that the maximum value of the degree of the nodes in the graph should not exceed 8 according to an experimental result of FIG. 4.
In addition, in the graph construction process, two users with a closest connection distance are preferentially connected by a ca- ble, that is, two users using the shortest cable are connected. Assuming that the number of nodes in the graph is N and the maxi- mum value of the degree of the nodes in the graph is D, the method includes the following steps: for each node n; in the graph, performing the following oper- ations: (1) finding out D nodes with the closest connection distance to the node n;, and sorting these nodes according to the connection distances from small to large to form a set |L]; (2) randomly generating an integer M, MSD; (3) for the previous M nodes in |L|, respectively checking whether each node n; is connected to the node n;? if the M nodes have not yet connected, connecting the nodes; if the M nodes have already been connected, skipping the node n4, and continuing to check the next node in |L| until all the nodes in |L| are checked; and (4) when all nodes in the graph have been subjected to the above operations, terminating the process.
The technical effects and advantages of the present invention are that the average path length of peer-to-peer power delivery can be reduced, thereby reducing the loss of power delivery; and at the same time, the reliability of the power grid can be im- proved, and the load on the power grid can be reduced.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 illustrates, under the background of user-side refor- mation, a peer-to-peer power delivery and transaction mode, i.e., "self-generating power for self-use, user-to-user transaction", between users.
FIG. 2 is a power grid structure applicable to a top-to- bottom intensive power delivery mode based on a traditional radial topology.
FIG. 3 is an example of a power grid structure applicable to a peer-to-peer power delivery mode based on a random graph topolo- gy.
FIG. 4 is a curve chart of influence of the degree of a node in a random graph on the power delivery performance in a power grid.
FIG. 5 is an example of power grid wiring based on a power router.
DETAILED DESCRIPTION OF THE EMBODIMENTS In order to make the objectives, technical solutions and ad- vantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely below in combination with the drawings in the embodiments of the present invention. Obviously, the embodi- ments described herein are only part of the embodiments of the present invention, not all the embodiments. Based on the embodi- ments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
One technical solution of the present invention: a power grid wiring method applicable to a peer-to-peer power delivery mode, including: cable wiring is performed by a specific network topolo- gy during construction of a power grid for peer-to-peer power de- livery, thereby improving the efficiency of peer-to-peer power de- livery and reducing the loss of power delivery and a load on net- work delivery.
In this solution, each user is equipped with one set of equipment capable of determining, distributing and forwarding pow- er, such as a power router. Description is made below by taking the power router as an example. The power router is firstly cou- pled to an energy management system (EMS) of a user A, or is di- rectly used as a part of the EMS of the user A. In addition, the power router is provided with a plurality of ports, each of which is connected to another user except the user A, so as to form a power delivery network (as shown in FIG. 5). In this network, pow- er is transmitted between the users through the power router. When the power router of the user A receives power transmitted from other users, it is determined, by means of information that is synchronously transmitted, which part of the power is purchased by the user A and which part of the power is to be transmitted to other users.
Later, the power router forwards the part of power purchased by the user A to the EMS of the user A, and the EMS dis- tributes this part of power to electrical appliances of the user A
5 for use.
Meanwhile, the power router forwards the power that should be transmitted to other users to its destination.
If the power router of the user A is directly connected to the power router of a certain user B that purchases power, the power router of the user A directly forwards the part of power purchased by the user B to the power router of the user B.
Or, the power router of the user A forwards the part of power purchased by the user B to the power router of a next node, i.e., a certain user C, on a de- livery path AB.
Such operations are repeated until the power is forwarded to the power router of the user B.

Claims (6)

© CONCLUSIES© CONCLUSIONS 1. Werkwijze voor het bekabelen van een elektriciteitsnet die toe- pasbaar is op een peer-to-peer stroomvoorzieningsmodus, met het kenmerk, dat de werkwijze als volgt is: wanneer een elektrici- teitsnet wordt aangelegd, het verbinden van gebruikers door een topologie van een willekeurige grafiek, waarbij elke gebruiker eén knooppunt in de willekeurige grafiek is, en waarbij een kabel voor het verbinden van de gebruikers een rand is in de willekeurige grafiek, waarbij elke gebruiker kan worden verbonden met 1 tot d gebruikers, dat wil zeggen, het aantal knooppunten in de grafiek is 1 tot d; in het grafische constructieproces zijn twee gebrui- kers met de kortste verbindingsafstand bij voorkeur verbonden door een kabel, dat wil zeggen, twee gebruikers die de kortste kabel gebruiken, zijn verbonden; ervan uitgaande dat het aantal knopen in de grafiek N is en de maximale waarde van het aantal van de knopen in de grafiek D is, omvat de methode de volgende stappen: voor elk knooppunt ni in de grafiek, worden de volgende bewerkingen uitgevoerd: (1) het vinden van D-knooppunten met de dichtstbijzijnde verbin- dingsafstand tot het knooppunt ni, en het sorteren van deze knoop- punten in overeenstemming met de verbindingsafstanden van klein naar groot om een set |L| te vormen; (2) het willekeurig genereren van een geheel getal M, MSD; (3) voor de vorige M-knooppunten in |L|, respectievelijk controle- ren of elk knooppunt nj is verbonden met het knooppunt ni?; als de M-knooppunten nog niet zijn verbonden, het verbinden van de knoop- punten; als de M-knooppunten al zijn verbonden, het overslaan van het knooppunt nj en verdergaan met het controleren van het volgen- de knooppunt in |L] totdat alle knooppunten in |L]| zijn gecontro- leerd; en (4) wanneer alle knooppunten in de grafiek zijn onderworpen aan de bovenstaande bewerkingen, het beëindigen van het proces.A method of wiring a power grid applicable to a peer-to-peer power supply mode, characterized in that the method is as follows: when a power grid is built, connecting users through a topology of a random graph, where each user is one node in the random graph, and where a cable connecting the users is an edge in the random graph, where each user can be connected from 1 to d users, that is, the number of nodes in the graph is 1 to d; in the graphic construction process, two users with the shortest connection distance are preferably connected by a cable, that is, two users using the shortest cable are connected; assuming that the number of nodes in the graph is N and the maximum value of the number of the nodes in the graph is D, the method includes the following steps: for each node ni in the graph, the following operations are performed: (1 ) finding D-nodes with the closest connection distance to the node ni, and sorting these nodes according to the connection distances from smallest to largest to obtain a set |L| to shape; (2) randomly generating an integer M, MSD; (3) for the previous M nodes in |L|, respectively checking whether each node nj is connected to the node ni?; if the M nodes are not yet connected, connecting the nodes; if the M nodes are already connected, skip the node nj and continue checking the next node in |L] until all nodes in |L]| have been checked; and (4) when all nodes in the graph have been subjected to the above operations, terminate the process. 2. Werkwijze voor het bekabelen van het elektriciteitsnet die van toepassing is op de peer-to-peer stroomleveringsmodus volgens con-2. Power grid cabling method applicable to peer-to-peer power supply mode according to con- clusie 1, met het kenmerk, dat twee gebruikers kunnen worden ver- bonden door één kabel, dat wil zeggen een ongericht netwerk, dat vermogen in beide richtingen op verschillende tijdstippen door kan sturen, maar slechts in één richting tegelijk vermogen mag verzen- den.claim 1, characterized in that two users can be connected by one cable, i.e. an undirected network, which can transmit power in both directions at different times, but may only transmit power in one direction at a time. 3. Werkwijze voor het bekabelen van het elektriciteitsnet die van toepassing is op de peer-to-peer stroomleveringsmodus volgens con- clusie 1, met het kenmerk, dat twee gebruikers kunnen worden ver- bonden door twee kabels, dat wil zeggen een tweerichtingsnetwerk, dat te allen tijde vermogen in beide richtingen door kan sturen.A method of power grid cabling applicable to the peer-to-peer power supply mode according to claim 1, characterized in that two users can be connected by two cables, i.e. a two-way network, which transmit power in both directions at all times. 4. Werkwijze voor het bekabelen van het elektriciteitsnet die van toepassing is op de peer-to-peer stroomleveringsmodus volgens con- clusie 1, met het kenmerk, dat de maximale waarde van het aantal van de knooppunten in de grafiek niet hoger mag zijn dan 8.A method of wiring the power grid applicable to the peer-to-peer power supply mode according to claim 1, characterized in that the maximum value of the number of the nodes in the graph should not exceed 8 . 5. Werkwijze voor het bekabelen van het elektriciteitsnet die toe- pasbaar is op de peer-to-peer stroomleveringsmodus volgens conclu- sie 1, met het kenmerk, dat elke gebruiker is uitgerust met één set apparatuur die in staat is om vermogen te bepalen, te distri- bueren en door te sturen, omvattende, maar niet beperkt tot, een stroom router.A method of wiring the power grid applicable to the peer-to-peer power supply mode according to claim 1, characterized in that each user is equipped with one set of equipment capable of determining power, distribute and forward, including, but not limited to, a stream router. 6. Werkwijze voor het bekabelen van het elektriciteitsnet, toepas- baar op de peer-to-peer stroomleveringsmodus volgens conclusie 5, met het kenmerk, dat de stroom router eerst wordt gekoppeld aan een energiebeheersysteem van een gebruiker, of direct wordt ge- bruikt als onderdeel van het energiebeheersysteem van de gebrui- ker.A method of power grid cabling applicable to the peer-to-peer power supply mode according to claim 5, characterized in that the power router is first coupled to a user's power management system, or used directly as part of the user's energy management system.
NL2031630A 2021-04-28 2022-04-19 Power grid wiring method applicable to peer-to-peer power delivery mode NL2031630B1 (en)

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