CN106160227B - Method for unified management of all-station communication network of intelligent substation - Google Patents
Method for unified management of all-station communication network of intelligent substation Download PDFInfo
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
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- Y04S10/16—Electric power substations
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Abstract
The invention relates to a method for unified management of a total station communication network of an intelligent substation, which comprises the following steps: setting a cpu port VLAN of a switch of an independent network; the cascade ports among the switches in the independent network are divided into the VLAN; the switch port connected with the network management type switch is divided into the VLAN; assigning a management IP to switches in the independent network; starting the LLDP function of the switch and realizing the unified management of the total station communication network; the invention connects the scattered communication networks through the management network, because of the existence of the independent VLAN, the newly added wiring and networking can not cause any influence on the existing service, and moreover, the operation of dividing the VLAN on the network wiring and the switch is not complicated, and the engineering implementation is simpler.
Description
Technical Field
The invention relates to the technical field of intelligent substation network communication, in particular to a method for unified management of an intelligent substation total station communication network.
Background
Transformer substation, place of changing voltage. In order to transmit the electric energy generated by the power plant to a remote place, the voltage must be increased to become high voltage, and then the voltage is decreased as required near the user, and the voltage increasing and decreasing work is completed by a transformer substation. The main equipment of a substation are switches and transformers. The small transformer substations are called as transformer substations according to different sizes. The transformer substation is larger than the substation. And (3) power substation: generally, the voltage reduction transformer substation has a voltage grade below 110 KV; a transformer substation: including "step-up, step-down" substations of various voltage classes. A substation is an electrical facility in an electrical power system that transforms voltage, receives and distributes electrical energy, controls the flow of electrical power, and regulates voltage, and it connects the grids of the various levels of voltage through its transformers.
The intelligent substation integrates basic effects of primary equipment and secondary equipment in a power grid, and realizes basic requirements of information sharing, mutual operation and the like between intelligent electrical equipment in the substation according to the IEC61850 communication standard.
The intelligent substation divides an automation system into a station control layer, a bay layer and a process layer through an IEC61850 information layering mode so as to realize total station information digitization and communication platform networking. The communication network in the intelligent transformer substation generally adopts a physically independent station control layer network and a process layer network. The station control layer network is used for connecting the station control layer equipment and the spacer layer equipment, and the process layer network is used for connecting the process layer equipment and the spacer layer equipment. In order to ensure the reliability of the network, a redundant double star topology is generally adopted for each layer of the network. The process layer network is divided into independent GOOSE network and SV network. The process layer network is also divided into a plurality of physical networks according to the voltage level, and the networks are redundant A/B networks, so that the communication network of the whole substation is divided into a plurality of independent networks, and a unified management system does not manage the networks at present.
LLDP is a two-layer protocol defined in 802.1ab, and provides a standard link layer discovery mode, which can organize information such as main capability, management address, device identifier, interface identifier, etc. of local device into different TLVs and distribute the TLVs to its directly connected neighbors, and the neighbors receive the information and then store it in the form of standard MIB, and also store LLDPDU received from the neighbors in the form of standard MIB, which can be used to discover physical topology structure and management configuration information of the device. The management system can build the topology structure of the communication network by reading the MIBs through the SNMP client.
SNMP is a Simple Network Management Protocol (SNMP) consisting of a set of standards for network management, including an application layer protocol (application layer protocol), a database model (database schema), and a set of resource objects. The protocol can support a network management system to monitor devices connected to the network for any regulatory concerns. The protocol is part of an Internet protocol cluster defined by the Internet Engineering Task Force (IETF). SNMP enables a network administrator to improve network management efficiency, discover and solve network problems in time, and plan the growth of the network. The network administrator can also receive the notification message and the alarm event report of the network node through the SNMP to know the problem of the network.
Because the communication network in the intelligent substation is composed of a plurality of independent networks at present, each network topology can only be acquired respectively by using the LLDP protocol, and unified network management cannot be realized, a method for unified management of the communication network is urgently needed, so that the total station communication network of the intelligent substation can be constructed into a unified management network.
Disclosure of Invention
In order to solve the above-mentioned deficiencies in the prior art, the present invention provides a method for unified management of a total station communication network of an intelligent substation, comprising the steps of:
I. setting a cpu port VLAN of the independent network switch;
II. The cascade ports among the switches of the independent network are divided into the VLAN;
III, dividing a switch port connected with the network management type switch into the VLAN;
IV, allocating management IP to the independent network switch;
v, starting the LLDP function of the switch and realizing the unified management of the total station communication network.
Preferably, the VLAN of the cpu port of the network switch in step I is set to a VLAN M which is different from all VLAN IDs existing in the network.
Preferably, in the step II, the cascaded ports between the independent network switches are classified into the VLAN in a tagged mode.
Preferably, in the step III, the independent network switch port accessing the network pipe type switch through the optical fiber or the network line is scribed into the VLAN in a tagged mode.
Preferably, the step IV of switch allocation management IP includes: and allocating management IP for the independent network switch, wherein the IP of the intelligent substation is in the same network segment.
Preferably, the LLDP function of the step vswitch includes: LLDP defines a standard method for ethernet network devices to advertise their presence to other nodes in the network and to maintain discovery information for each neighboring device.
Preferably, the step V of implementing unified management of the total station communication network includes: the management system reads the LLDP-MIB in each switch through the SNMP to acquire the connection relation among all the switches in the network, further constructs the topological structure of the whole network, or shields the newly added connection relation in a network management system, reads and configures the functional parameters of all the service switches through get and set operations of the SNMP, and therefore unified management of the total station communication network is achieved.
Preferably, the intelligent substation comprises process layer equipment, bay layer equipment, station control layer equipment, a station control layer network and a process layer network;
the station control layer equipment and the spacer layer equipment are used for information transmission through Ethernet, and the spacer layer equipment and the process layer equipment are communicated through an optical cable;
the spacer layer device bridges the station layer network and the process layer network.
Preferably, the process layer device comprises: the intelligent equipment, the merging unit and the intelligent terminal complete the functions of distribution, change and transmission of electric energy of the transformer substation, measurement, control, protection, metering and state monitoring;
the spacer layer apparatus comprises: the relay protection device, the measurement and control device and the fault recording secondary equipment realize the function of using data of one interval and acting on the interval primary equipment;
the station control layer device includes: the system comprises an automation system, a station domain control system, a communication system and a time synchronization system, realizes measurement and control functions facing to a total station or primary equipment, and completes data acquisition and monitoring control, operation locking and synchronous phasor acquisition, electric energy acquisition and protection information management functions.
Preferably, the measurement and control device comprises a main transformer oil chromatogram online monitoring module, a lightning arrester state detection module and a power supply system;
the power supply system comprises an alternating current power supply system, a direct current power supply system, a UPS power supply system, a communication power supply system, an inverter power supply system and a communication monitoring system.
Compared with the closest prior art, the invention has the following beneficial effects:
1. the invention integrates all physically dispersed networks to form a management network, thereby realizing the unified management of the communication network.
2. All management ports of the invention are in an independent VLAN, the service message can not enter the management switch and the management system through the newly added channel, and the management message can not enter the service ports to influence the normal service communication.
3. The management platform switch can be a newly added switch, and can also be realized by utilizing a redundant port of a station control layer switch, and the operation of network wiring and VLAN division on the switch is not complicated, so the invention is simpler in engineering implementation.
Drawings
Fig. 1 is a schematic diagram of a method for unified management of a total station communication network of an intelligent substation according to the present invention;
fig. 2 is a schematic block diagram of an intelligent substation according to the present invention.
Detailed Description
For a better understanding of the present invention, reference is made to the following description taken in conjunction with the accompanying drawings and examples.
The invention provides a method for unified management of a total station communication network of an intelligent substation, as shown in fig. 2, the intelligent substation is structurally divided into a station control layer device, a bay layer device, a process layer device, a station control layer network and a process layer network, and is functionally divided into the process layer and the station control layer:
the station control layer equipment and the spacer layer equipment are in information transmission through Ethernet, and the spacer layer equipment and the process layer equipment are in communication through an optical cable;
the spacer layer device bridges the station layer network and the process layer network.
The process layer device includes: the intelligent operation box, the merging unit and the intelligent terminal are formed by the primary equipment and the intelligent assembly; the primary device comprises: electronic transformers, switchgear, and the like.
The spacer layer apparatus includes: secondary equipment such as a relay protection device, a measurement and control device, a metering device and fault recording equipment;
the station control layer equipment comprises: the system comprises an automation system, a station domain control system, a communication system and a time synchronization system.
The measurement and control device comprises a main transformer oil chromatogram on-line monitoring module, a lightning arrester state detection module and a power supply system;
the power supply system comprises an AC power supply system, a DC power supply system, a UPS power supply system, a communication power supply system, an inverter power supply system and a communication monitoring system
The station control layer equipment is an information integration platform consisting of a telecontrol communication device, a network recording and analyzing device, a station domain control system, a station level monitoring system, a server and the like, and functions of monitoring, processing, comprehensive analysis, remote communication and the like of panoramic data of the intelligent substation are realized;
data communication between process layer equipment, substation layer equipment and various controllers and sensors is realized through a spacer layer equipment communication bus, primary equipment such as an electronic transformer, a circuit breaker and a transformer of a process layer is monitored and signal sampling is carried out by utilizing intelligent secondary equipment such as a matched measurement and control device and a relay protection device, and corresponding operation is executed through analysis and judgment of sampling signals;
the process level equipment is intelligentized by replacing and transforming primary equipment such as a transformer, a voltage/current transformer, a circuit breaker, an isolating switch and the like in the process level equipment by adopting an advanced electronic device and an intelligent assembly.
The method for the unified management of the total station communication network of the intelligent substation comprises the following steps:
I. setting VLAN of a cpu port of a switch of an independent network;
the VLAN, namely the management VLAN, of the cpu ports of the switches of all independent networks in the intelligent substation is uniformly set to be VLAN M, and M is different from all VLAN IDs existing in the networks.
II. The cascade ports among the switches in the independent network are divided into the newly set VLAN;
the cascade ports among the switches in each independent network are divided into VLAN M and added in a tagged mode, so that the management message can be forwarded across the switches, the ports are in the tagged mode, and when the data packet does not contain the VLAN, the default VLAN is added to the input data packet; if the packet itself already contains a VLAN, it is not added.
III, a switch port connected with the network management type switch is divided into a newly set VLAN;
each independent network is led with an optical fiber or network wire to access the network type switch, the switch port connected with the independent network end is divided into VLAN M and added in a tagged mode, the switch port connected with the network type switch end is also divided into VLAN M and added in the tagged mode
IV, allocating management IP by the switch in the independent network;
each switch in the independent network is allocated with a management IP, the total station IP is in the same network segment, and the IP of the management system is also in the network segment, so that the management system can access each switch.
V, starting the LLDP function of the switch and realizing the unified management of the total station communication network;
the Link Layer Discovery Protocol LLDP is a vendor-independent two-Layer Protocol, and can organize the Information of the main capability, Management address, device identifier, interface identifier, etc. of the local device into different TLVs (Type/Length/Value), encapsulate the TLVs into LLDPDU (Link Layer Discovery Protocol Data Unit), distribute the TLVs to the neighbors directly connected with the local device, and store the neighbor in the form of standard MIB (Management Information Base) after receiving the Information, so as to be used for the network Management system to inquire and judge the communication condition of the Link.
The management system reads the LLDP-MIB in each switch through the SNMP to acquire the connection relation among all the switches in the network, and then the topological structure of the whole network is constructed. Of course, it can shield the new connection relation in the network management system, but only draw the topology of the service network, then read and configure all the service switch function parameters through get and set operation of SNMP, thus realizing the unified management of the total station communication network.
The SNMP consists of a set of network management standards, including an application layer protocol (application layer protocol), a database model (database schema) and a set of resource objects. The protocol can support a network management system to monitor whether any equipment connected to the network has any situation causing management attention, and a network administrator can also receive notification messages and alarm event reports of network nodes through SNMP to know problems occurring in the network.
The network managed by the SNMP mainly comprises three parts: managed devices, SNMP agents and Network Management Systems (NMS), the relationship between them is specifically as follows:
each device managed in the network has a Management Information Base (MIB) for collecting and storing management information. The NMS can obtain this information via the SNMP protocol. The managed devices, also referred to as network elements or network nodes, may be routers, switches, servers or hosts, etc. that support the SNMP protocol.
The SNMP agent is a network management software module on the managed device that holds the relevant management information of the local devices and serves to convert them into a format compatible with SNMP and deliver them to the NMS.
The NMS runs applications to implement the functionality of monitoring managed devices. In addition, NMS also provides a large number of processing procedures and necessary storage resources for network management.
The present invention is not limited to the above embodiments, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention are included in the scope of the claims of the present invention which are filed as the application.
Claims (8)
1. A method for unified management of a total station communication network of an intelligent substation is characterized by comprising the following steps:
I. setting a cpu port VLAN of the independent network switch;
II. Dividing the cascade ports among the independent network switches into the VLAN;
III, dividing a switch port connected with the network management type switch into the VLAN;
IV, allocating management IP to the independent network switch;
v, starting the LLDP function of the switch and realizing the unified management of the total station communication network;
the LLDP function of the step V switch includes: organizing the main capability, management address, equipment identification and interface identification information of the local terminal equipment into different types/lengths/values, encapsulating the information in a link layer discovery protocol data unit and issuing the information to a neighbor directly connected with the local terminal equipment, and storing the information in a standard management information base form after the neighbor receives the information so as to enable a network management system to inquire and judge the communication condition of a link;
the step V of implementing unified management of the total station communication network includes: the management system reads the LLDP-MIB in each switch through the SNMP to acquire the connection relation among all switches in the network, further constructs the topological structure of the whole network, or shields the newly-added connection relation in a network management system, and reads and configures the function parameters of all the service switches through the acquisition and setting operation of the SNMP, thereby realizing the unified management of the total station communication network.
2. The intelligent substation total station communication network unified management method according to claim 1, wherein the VLAN of the cpu port of the step I independent network switch is set to a VLAN M that is distinguished from all VLAN IDs present in the network.
3. The method for unified management of intelligent substation total station communication networks according to claim 1, wherein in said step II, cascading ports between independent network switches are striped into said VLAN.
4. The method for unified management of intelligent substation total station communication networks according to claim 1, wherein said step III, the individual network switch ports through the fiber or network access network pipe type switch are tapped into said VLAN in tagged mode.
5. The method for unified management of total station communication networks of intelligent substation of claim 1, wherein said step IV switch assigning management IP comprises: and allocating management IP for the independent network switch, wherein the IP of the intelligent substation is in the same network segment.
6. The method for unified management of the total station communication networks of the intelligent substation of claim 1, wherein the intelligent substation comprises process layer devices, bay layer devices, station control layer networks, and process layer networks;
the station control layer equipment and the spacer layer equipment are used for information transmission through Ethernet, and the spacer layer equipment and the process layer equipment are communicated through an optical cable;
the spacer layer device bridges the station layer network and the process layer network.
7. The method for unified management of intelligent substation total station communication networks of claim 6, wherein said process layer equipment comprises: the system comprises intelligent equipment, a merging unit and an intelligent terminal;
the spacer layer apparatus comprises: the system comprises a relay protection device, a measurement and control device and fault recording secondary equipment;
the station control layer device includes: the system comprises an automation system, a station domain control system, a communication system and a time synchronization system.
8. The method for unified management of the total station communication network of the intelligent substation of claim 7, wherein the measurement and control device comprises a main transformer oil chromatography online monitoring module, a lightning arrester state detection module and a power supply system;
the power supply system comprises an alternating current power supply system, a direct current power supply system, a UPS power supply system, a communication power supply system, an inverter power supply system and a communication monitoring system.
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| CN107528386A (en) * | 2017-07-06 | 2017-12-29 | 中国南方电网有限责任公司 | A kind of intelligent substation automatic network system |
| CN107241241B (en) * | 2017-07-17 | 2019-08-20 | 国网四川省电力公司电力科学研究院 | A kind of Network records analytical equipment performance test methods |
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| CN111131092A (en) * | 2019-12-31 | 2020-05-08 | 深圳市源拓光电技术有限公司 | Power grid process switch and configuration method |
| CN111654111B (en) * | 2020-06-15 | 2023-05-23 | 国网宁夏电力有限公司电力科学研究院 | GOOSE simulation test method for secondary system of intelligent substation |
| CN112260408B (en) * | 2020-11-16 | 2021-05-14 | 朱思曈 | Intelligent substation control system and method |
| CN113014437A (en) * | 2021-03-18 | 2021-06-22 | 国网河北省电力有限公司信息通信分公司 | SDN-based intelligent substation communication network description model |
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