CN113972630A - Flexe-based power distribution network differential protection service hybrid networking method and system - Google Patents
Flexe-based power distribution network differential protection service hybrid networking method and system Download PDFInfo
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- CN113972630A CN113972630A CN202110986559.6A CN202110986559A CN113972630A CN 113972630 A CN113972630 A CN 113972630A CN 202110986559 A CN202110986559 A CN 202110986559A CN 113972630 A CN113972630 A CN 113972630A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/262—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of switching or blocking orders
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0061—Details of emergency protective circuit arrangements concerning transmission of signals
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0092—Details of emergency protective circuit arrangements concerning the data processing means, e.g. expert systems, neural networks
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- Artificial Intelligence (AREA)
- Evolutionary Computation (AREA)
- Physics & Mathematics (AREA)
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- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The invention discloses a power distribution network differential protection service hybrid networking method and system based on Flexe, belonging to the technical field of power grid networking, and comprising the following steps of S1, establishing a basic communication network area based on Flexe equipment; s2, establishing a corresponding communication model of the region through an ant colony algorithm; and S3, configuring the communication path obtained based on the ant colony algorithm model. According to the invention, the flexible configuration of the shortest delay of the mutual communication nodes is realized through the regulation and control of the ant colony algorithm in the networking area, the end-to-end networking service of the bearer network can be ensured, the tandem processing of all the substations in the networking nodes and equipment of each level of power dispatching communication center can be realized, the rapid summary positioning of the information service of each substation node is realized, the reliability of a communication channel is improved, the application requirement of wide-area distributed differential protection is met, the positioning tracing of the optimal communication path point of the relative networking nodes is met, and the instantaneity, the self-synchronization capability and the protection performance required by the networking of the differential protection service are met.
Description
Technical Field
The invention belongs to the technical field of power grid networking, and particularly relates to a power distribution network differential protection service hybrid networking method and system based on Flexe.
Background
The power distribution network is used as an important link which is started up and down in the production process of the intelligent power grid, is directly oriented to vast users, is an indispensable infrastructure in social development, the traditional power distribution network tide is unidirectional, a power plant flows to the users, distributed power generation is connected into the power distribution network, the tide flow direction of the power distribution network is changed, unidirectional tide is changed into bidirectional tide, differential protection is that current vector differences at two ends of an input CT (current transformer) are used, an action element is started when a set action value is reached, and devices (such as lines, generators, motors, transformers and the like) within a protection range between two ends of the input CT are protected;
the FlexE technology has the main characteristics that decoupling of service bandwidth requirements and physical interface bandwidths is realized, gradual evolution of the service bandwidths 25G → 50G → 100G → 200G → 400G → xT is easily realized through a standard 25GE/100GE rate interface and a port binding and time slot crossing technology, the 400G large bandwidth is realized through the 100GE interface, the FlexE bandwidth expansion technology ensures that services are strictly and uniformly distributed on each physical interface of a FlexE Group through time slot control, network bandwidth resource occupation can be adjusted in real time by dynamically increasing or reducing the number of time slots, real-time change of service flow is responded, networking operation among devices is needed for differential protection services, a plurality of power distribution network fault processing device manufacturers in the transmission networking communication technology are provided, the execution communication standards of the power distribution network fault processing devices are inconsistent, and the universality and interchangeability of service fault processing information are poor; the coverage area of the power distribution network is wide, the access of distributed power supplies is discrete, the traditional differential protection networking system is difficult to meet the application requirement of wide-area distributed differential protection, the optimal communication path point between the relative networking nodes is difficult to position, and the instantaneity, the self-synchronization capability and the protection performance of networking data communication are influenced.
Disclosure of Invention
The invention aims to: the hybrid networking method and system for the power distribution network differential protection service based on the Flexe are provided for solving the problems that a differential protection networking system is difficult to meet the wide-area distributed differential protection application requirement, the optimal communication path point between relative networking nodes is difficult to position, and the instantaneity, self-synchronization capability and protection performance of networking data communication are affected.
In order to achieve the purpose, the invention adopts the following technical scheme:
a power distribution network differential protection service hybrid networking method based on Flexe comprises the following steps:
s1, establishing a basic communication network area based on Flexe equipment, and performing area grading processing;
s2, establishing a corresponding communication model of the region through an ant colony algorithm, calculating the shortest communication delay among nodes of each level of region through the communication model, and judging a relatively overall shortest communication arrival path through delay pheromones;
and S3, configuring and networking the communication configuration of each area network based on the communication path configuration obtained by the ant colony algorithm model.
As a further description of the above technical solution:
the base network area includes a network area constructed by multi-directional cross-connect equipment.
As a further description of the above technical solution:
the multidirectional cross-connection PCM equipment is provided with 4, 8 or 16 2M interfaces and various service circuit interfaces, the converged PCM with 4 or 8 2M interfaces is installed on a hub substation, the converged PCM with 16 2M interfaces is installed on a regional communication center, 5 2M interfaces are adopted to be respectively connected with the PCM equipment of a large-area communication center and the regional communication center, and the remaining 11 2M interfaces are connected with the converged PCM of each hub substation.
As a further description of the above technical solution:
defining a FlexeShim layer between communication layers of the bearing equipment, carrying out time slice-based segmentation on the bandwidth of a physical port, and realizing the separation of services among slices on a forwarding layer through the time slot multiplexing of hardware.
As a further description of the above technical solution:
each Flexe slice is provided with an independent MAC address, and hard isolation among slices under a single physical port does not influence each other.
As a further description of the above technical solution:
the ant colony algorithm communication model establishment comprises the following steps:
s201, collecting basic communication network area communication equipment, and carrying out convergence delay signals and communication protocols between node areas;
s202, forming ant colony moving path pheromones according to communication characteristics in the region, judging a plurality of nodes which are most matched with corresponding communication equipment through information, realizing repeated training of path searching through updating a target point and the ant colony pheromones, and obtaining an optimal matching communication path through training of an ant colony model;
and S203, obtaining the optimal networking solution of the communication equipment according to the optimized path, and performing communication configuration networking.
As a further description of the above technical solution:
the method further comprises a hybrid networking system based on the method, and specifically comprises the steps of carrying an ant colony algorithm model program through a network server to carry out networking hybrid calling processing on the power distribution network, wherein the network server is connected with a power distribution network differential protection service platform, and the power distribution network differential protection service platform comprises a fault recognition model and a solution library corresponding to the fault recognition model.
As a further description of the above technical solution:
the fault identification model comprises the steps of comparing and judging the fault position and the property of a power grid differential point, namely the phase of the amplitude of the electric quantity and the current in the power grid, judging the positive sequence fault component current differential protection action, and realizing the real-time exchange of the current data at two ends of the line and the current data at two ends of the line synchronously on the basis of the mature application of the power transmission line.
As a further description of the above technical solution:
the power grid judgment comprises a non-branch feeder, an undetectable branch feeder and a feeder with a weak feeder end.
As a further description of the above technical solution:
also included is introducing a voltage magnitude criterion that collects voltage signals in situ via the PT.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
according to the invention, the flexible configuration of the shortest delay of the mutual communication nodes is realized through the regulation and control of the ant colony algorithm in the networking area, the end-to-end networking service of the bearer network can be ensured, the tandem processing of all substations in the networking nodes and equipment of each level of power dispatching communication center can be realized, the transfer of the substation service to each dispatching center is realized by utilizing the non-blocking digital time slot cross connection capability of Flexe, the quick summary positioning of the information service of each substation node is realized, the unified management of the service is facilitated by bearing different types of services of each substation, the transfer of a circuit is reduced, the reliability of a communication channel is improved, the application requirement of distributed wide-area differential protection is met, the positioning and tracing of the optimal communication path point of the relative networking nodes is met, and the instantaneity, the self-synchronization capability and the protection performance required by differential protection service networking are met.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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 distribution network differential protection service hybrid networking method based on Flexe comprises the following steps:
s1, establishing a basic communication network area based on Flexe equipment, and performing area grading processing;
s2, establishing a corresponding communication model of the region through an ant colony algorithm, calculating the shortest communication delay among nodes of each level of region through the communication model, and judging a relatively overall shortest communication arrival path through delay pheromones;
and S3, configuring and networking the communication configuration of each area network based on the communication path configuration obtained by the ant colony algorithm model.
The base network area includes a network area constructed by multi-directional cross-connect equipment.
The multidirectional cross-connection PCM equipment is provided with 4, 8 or 16 2M interfaces and various service circuit interfaces, the converged PCM with 4 or 8 2M interfaces is installed in a hub substation, the converged PCM with 16 2M interfaces is installed in a regional communication center, 5 2M interfaces are adopted to be respectively connected with the PCM equipment in a large-area communication center and the regional communication center, and the remaining 11 2M interfaces are connected with the converged PCM of each hub substation;
furthermore, the 64k digital cross-connect equipment generally has more than 32 2M interfaces, does not provide service circuit interfaces, can connect all the PCM equipment of all substations and all levels of power dispatching communication centers together by the equipment, and uses the non-blocking digital time slot cross-connect capability to realize the transfer of the substation services to each dispatching center, in addition, because the 64k digital cross-connect equipment has the capability of performing 64k double decomposition on all 2M circuits, different types of services from each substation can be respectively connected to corresponding service personnel ends, so that the unified management of the services is facilitated, the transfer of the circuits is reduced, and the reliability of the communication channels is improved.
Defining a FlexeShim layer between communication layers of the bearing equipment, carrying out time slice-based segmentation on the bandwidth of a physical port, and realizing the separation of services among slices on a forwarding layer through the time slot multiplexing of hardware;
each Flexe slice is provided with an independent MAC address, and hard isolation among slices under a single physical port does not influence each other;
furthermore, the channelized sub-interface and the Flexe technology are combined and flexibly configured, so that the end-to-end Service Level Agreement (SLA) of the bearer network can be guaranteed. The bandwidth required by live video broadcast is 500M, the time delay is 30ms, and the packet loss rate is 10-6; the bandwidth of the telemedicine is 300M, the time delay is 20ms, and the jitter is 1 ms; the power service requires 50M of bandwidth and 5ms of time delay. The bearer device mainly implements routing and auto discovery functions for transferring data, implementing control and management.
A 64k digital cross connect device typically has more than 32 2M interfaces and does not provide service circuit interfaces. The method can connect all the PCM equipment of all the transformer substations and all the power dispatching communication centers together, and realize the transfer of transformer substation services to all the dispatching centers by using the non-blocking digital time slot cross connection capacity of the PCM equipment. In addition, because the 64k digital cross connection equipment has the capacity of performing 64k double decomposition on all 2M circuits, different types of services from all substations can be respectively connected to corresponding service access ends, so that the services can be managed uniformly, the switching of the circuits is reduced, and the reliability of a communication channel is improved.
The ant colony algorithm communication model establishment comprises the following steps:
s201, collecting basic communication network area communication equipment, and carrying out convergence delay signals and communication protocols between node areas;
s202, forming ant colony moving path pheromones according to communication characteristics in the region, judging a plurality of nodes which are most matched with corresponding communication equipment through information, realizing repeated training of path searching through updating a target point and the ant colony pheromones, and obtaining an optimal matching communication path through training of an ant colony model;
s203, obtaining an optimal networking solution of the communication equipment according to the optimized path, and performing communication configuration networking;
further, the communication characteristics of the communication devices within the communication network area include signal strength and frequency.
Example 2
A power distribution network differential protection service hybrid networking system based on Flexe specifically comprises a network server and a power distribution network differential protection service platform, wherein the network server carries an ant colony algorithm model program to carry out networking hybrid calling processing on a power distribution network, and the network server is connected with the power distribution network differential protection service platform which comprises a fault identification model and a solution library corresponding to the fault identification model;
the fault identification model comprises the steps of comparing and judging the fault position and the property of a power grid differential point, namely the phase of the amplitude of the electric quantity and the current in the power grid, judging the positive sequence fault component current differential protection action, and realizing the real-time exchange of current data at two ends of a circuit and current data at two ends of the circuit synchronously on the basis of the mature application of a power transmission line;
the power grid judgment comprises a non-branch feeder line, an undetectable branch feeder line and a feeder line with a weak feeder end, and further comprises a voltage quantity criterion, wherein the voltage quantity criterion collects voltage signals through a PT on site.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. A power distribution network differential protection service hybrid networking method based on Flexe is characterized by comprising the following steps:
s1, establishing a basic communication network area based on Flexe equipment, and performing area grading processing;
s2, establishing a corresponding communication model of the region through an ant colony algorithm, calculating the shortest communication delay among nodes of each level of region through the communication model, and judging a relatively overall shortest communication arrival path through delay pheromones;
and S3, configuring and networking the communication configuration of each area network based on the communication path configuration obtained by the ant colony algorithm model.
2. The Flexe-based power distribution network differential protection service hybrid networking method according to claim 1, wherein the basic network area comprises a network area constructed by multidirectional cross-connection equipment.
3. The Flexe-based power distribution network differential protection service hybrid networking method according to claim 2, wherein the multidirectional cross-connection PCM equipment has 4, 8 or 16 2M interfaces and various service circuit interfaces, the converged PCM with 4 or 8 2M interfaces is installed in a hub substation, the converged PCM with 16 2M interfaces is installed in a regional communication center, 5 2M interfaces are adopted to connect the PCM equipment in the large-area communication center and the regional communication center respectively, and the remaining 11 2M interfaces are connected with the converged PCM of each hub substation.
4. The FlexE-based power distribution network differential protection service hybrid networking method according to claim 3, further comprising defining a FlexEshim layer between communication layers of the bearer, performing time slice-based segmentation on physical port bandwidth, and implementing service separation between slices on a forwarding layer through time slot multiplexing of hardware.
5. The Flexe-based power distribution network differential protection service hybrid networking method according to claim 4, wherein each Flexe slice is provided with an independent MAC address, and hard isolation between slices under a single physical port does not affect each other.
6. The Flexe-based power distribution network differential protection service hybrid networking method according to claim 1, wherein the ant colony algorithm communication model establishment comprises the following steps:
s201, collecting basic communication network area communication equipment, and carrying out convergence delay signals and communication protocols between node areas;
s202, forming ant colony moving path pheromones according to communication characteristics in the region, judging a plurality of nodes which are most matched with corresponding communication equipment through information, realizing repeated training of path searching through updating a target point and the ant colony pheromones, and obtaining an optimal matching communication path through training of an ant colony model;
and S203, obtaining the optimal networking solution of the communication equipment according to the optimized path, and performing communication configuration networking.
7. The hybrid networking method for the distribution network differential protection services based on the FlexE according to any one of claims 1 to 7, further comprising a hybrid networking system based on the method, specifically comprising a step of carrying an ant colony algorithm model program through a network server to perform a hybrid networking call processing on the distribution network, wherein the network server is connected with a distribution network differential protection service platform, and the distribution network differential protection service platform comprises a fault identification model and a solution library corresponding to the fault identification model.
8. The Flexe-based power distribution network differential protection service hybrid networking system according to claim 7, wherein the fault identification model comprises a fault position and property judgment function for comparing the phase of the amplitude of the electric quantity current in the power grid, which is a power grid differential point, and a positive sequence fault component current differential protection action criterion, and realizes real-time exchange of current data at two ends of a line synchronously based on mature application of a power transmission line.
9. The FlexE-based hybrid networking method and system for differential protection services of a power distribution network according to claim 8, wherein the grid judgment comprises an unbranched feeder, an undetectable branch feeder, and a feeder with a weak feeder.
10. The FlexE-based hybrid networking method and system for differential protection services of a power distribution network according to claim 9, further comprising introducing a voltage quantity criterion, wherein the voltage quantity criterion locally collects voltage signals through PT.
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| CN114844016A (en) * | 2022-07-05 | 2022-08-02 | 国网江苏省电力有限公司信息通信分公司 | Flexe-based differential protection system, differential protection method and differential protection device |
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| CN114844016A (en) * | 2022-07-05 | 2022-08-02 | 国网江苏省电力有限公司信息通信分公司 | Flexe-based differential protection system, differential protection method and differential protection device |
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