500kV intelligent station process level network dismantling and transforming method in three-second wiring mode

Abstract

According to the 500kV intelligent station process level network dismantling and transforming method in the three-second wiring mode, a VLAN is re-divided in a bus interval process level network switch, and it is guaranteed that GOOSE information transmission is mutually independent and does not interfere with one another. GOOSE information is transmitted in a cascading mode through a cross-interval process layer switch instead of a mode that a bus interval process layer network switch is directly connected with an optical cable of a circuit breaker protection device of a modified interval, and it is guaranteed that after a new circuit breaker protection device is put into operation, information transmission between the new circuit breaker protection device and a bus protection device of a bus interval is normal. A connection mode of a new circuit breaker protection device and a process layer network of an old bus protection interval is changed into optical fiber direct connection transmission from process layer network switch cascading, and GOOSE information transmission stability between a cross-interval circuit breaker protection device and a bus protection device is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of power grid upgrading and reconstruction, and in particular to a method for dismantling and reconstructing a process layer network of a 500kV intelligent station in a two-thirds wiring form. Background Art

[0002] When a typical 500kV conventional smart station under the 3 / 2 wiring mode is upgraded to a new generation of autonomous and controllable smart station, if conditions permit, the primary and secondary equipment of the entire station can be disconnected from the power grid. Under this condition, all the secondary equipment of the entire station can be dismantled, reinstalled, debugged and put into operation. Under this condition, only the power transmission of the smart station will be affected, while ensuring the safe operation of the primary and secondary equipment.

[0003] For the 500kV conventional intelligent station under the jurisdiction of the power plant or the key 500kV conventional intelligent hub station in the power grid, the switch station itself must always ensure power transmission and system stability. The power outage of the entire station equipment will directly affect the power transmission and system stability of the power plant and the power grid, affect the reliability of electricity use, and cause direct economic losses to the power plant. When the conditions for the power outage and transformation of all primary and secondary equipment in the station are not met, it is necessary to further explore a special working condition in which the old and new equipment are running at the same time after the transformation of some old equipment is completed and the new equipment is put into operation. At the same time, technical measures are taken to address the technical difficulties of dismantling the process layer network under this special working condition to ensure the normal transmission of the process layer network GOOSE information and the reliable and compatible operation of the old and new equipment. Summary of the invention

[0004] The present invention provides a method for dismantling and reconstructing a process layer network of a 500kV intelligent station in a two-thirds wiring form, and the technical problems solved are: 1) When upgrading a typical 500kV conventional smart station under the 3 / 2 wiring mode to a new generation of autonomous and controllable smart station, the technical difficulties of dismantling the process layer network equipment in the interval to be transformed under the condition of all partial power outages; 2) After the new equipment under the new generation of autonomous and controllable intelligent station architecture in the station is put into operation, when it runs simultaneously with the old equipment across the interval, the stability and reliability of GOOSE information transmission between the new and old equipment under various working conditions can be guaranteed.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: A method for dismantling and reconstructing a process layer network of a 500 kV intelligent station in a two-thirds wiring form, comprising: Enable the backup network interface VLAN on the process layer network switch of the bus bay that has not been dismantled and renovated; Re-lay the optical cable, and connect the inter-bay circuit breaker protection device through the busbar bay process layer network switch to ensure that the newly modified circuit breaker protection device can still access the process layer network of the intelligent station, and ensure that the inter-bay equipment can still transmit GOOSE information after removing its corresponding process layer network switch; After all new circuit breaker protection devices in adjacent bays are replaced and refitted, the process-layer network equipment in the busbar bay will be dismantled and taken out of operation together with the old busbar protection devices to ensure the compatible operation of the busbar protection devices and the circuit breaker protection devices in adjacent bays during the transition period of equipment transformation.

[0006] The spare network interface VLAN on the process layer network switch is a dedicated interface and a dedicated local area network of the process layer switch of the new circuit breaker protection device in the adjacent interval.

[0007] The specific steps of the above transformation method are: Step 1: Lay a direct optical cable between the busbar bay process layer switch and the new circuit breaker protection device in the adjacent bay; Step 2: Configure the backup network interface VLAN on the bus bay process layer network switch; Step 3: The newly installed circuit breaker protection device in the adjacent bay is connected to the dedicated network interface of the process layer switch of the bus bay through a direct optical cable to realize GOOSE information transmission between the new circuit breaker protection device and the old bus protection device, so as to realize compatible operation between the new and old protection devices; Step 4: Remove the original process layer switches in the adjacent intervals.

[0008] The specific steps for dismantling and renovating the above-mentioned busbar bay process layer network equipment are as follows: Step 1: The installation and commissioning of the busbar protection device of the new generation of autonomous and controllable intelligent station is completed; Step 2: All circuit breaker protection devices in adjacent intervals of busbar protection are remodeled and reconstructed; Step 3: Dismantle the busbar bay process layer network equipment; Step 4: Remove the direct optical cable between the busbar compartment and the circuit breaker protection device in the adjacent compartment.

[0009] The present invention provides a method for dismantling and reconstructing a process layer network of a 500kV intelligent station in a two-thirds wiring form, which has the following beneficial effects: 1. In the process of upgrading a typical 500kV conventional smart station to a new generation of autonomous and controllable smart station under the 3 / 2 wiring mode, the old equipment can be transformed under the premise of ensuring power transmission and system stability; 2. The compatibility problem between the new and old equipment can be perfectly solved without affecting the intelligent architecture of the original intelligent station secondary equipment, ensuring the complete independence and stable operation of the two intelligent station architectures; 3. Ensure the safety and operability when dismantling and renovating old equipment in a certain interval; 4. Ensure stable and reliable transmission of GOOSE information between new and old equipment across intervals; 5. This method can be used to successfully dismantle the original process layer network equipment of the entire site without causing adverse effects on any associated equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of GOOSE information transmission across bays in a typical 500kV conventional intelligent station process layer network; Figure 2 It is a schematic diagram of GOOSE information transmission across the busbar interval after the new circuit breaker protection of the present invention is put into operation. DETAILED DESCRIPTION

[0011] In order to make the purpose, technical solutions and advantages of the present invention clearer, the following content will systematically and completely describe the specific technical solutions of the present invention in combination with the drawings provided according to the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0012] A method for dismantling and reconstructing a process layer network of a 500 kV intelligent station in a two-thirds wiring form, comprising: Enable the backup network interface on the process layer network switch of the bus bay that has not been dismantled and renovated yet, and divide the VLAN; Re-lay the optical cable, and directly connect the circuit breaker protection and other devices across the bays through the busbar bay process layer network switch to ensure that the newly modified circuit breaker protection and other devices can still be connected to the process layer network of the conventional intelligent station, ensuring stable and reliable transmission of GOOSE information between devices across bays; After all new circuit breaker protection devices in adjacent bays are replaced and refitted, the process-layer network equipment in the busbar bay will be dismantled and taken out of operation together with the old busbar protection devices to ensure the compatible operation of the busbar protection devices and the circuit breaker protection devices in adjacent bays during the transition period of equipment transformation.

[0013] The removal of the process layer network switch of the adjacent interval of busbar protection can reduce the GOOSE information transmission links between the busbar protection device and the adjacent interval circuit breaker protection, and change the transmission through the original two process layer network switches to transmission through one process layer network switch. While reducing the switch equipment, it optimizes the information transmission path, reduces the risk of equipment shutdown due to equipment defects, and better ensures the stable operation of the power system.

[0014] The specific implementation steps of this method are: 1. Lay the direct optical cable between the busbar bay process layer switch and the new circuit breaker protection device in the adjacent bay; 2. Configure the backup network interface VLAN of the busbar bay process layer switch. This VLAN is the dedicated interface and dedicated VLAN of the new circuit breaker protection device in the adjacent bay; 3. The newly installed circuit breaker protection device in the adjacent bay is connected to the dedicated network interface of the process layer switch of the bus bay through a direct optical cable to realize the GOOSE information transmission between the new circuit breaker protection device and the old bus protection device, and realize the compatible operation between the new and old protection devices; 4. Remove the original process layer switches in adjacent bays, and while gradually removing the process layer network, ensure the smooth upgrade of the 500kV typical conventional smart station to a new generation of autonomous and controllable smart station.

[0015] like Figure 1 As shown in , during the secondary equipment replacement and transformation process, the process layer switches in adjacent bays need to be removed. At this time, the process layer switches in the busbar bay will lose physical connection with the busbar switches in the adjacent bays, and the busbar protection device will not be able to send and receive GOOSE information normally. If the process layer switches in the adjacent bays are directly removed without taking any technical measures, the old busbar protection will not be able to operate normally.

[0016] The specific steps for dismantling and renovating the above-mentioned busbar bay process layer network equipment are as follows: Step 1: The installation and commissioning of the busbar protection device of the new generation of autonomous and controllable intelligent station is completed; Step 2: All circuit breaker protection devices in adjacent intervals of busbar protection are remodeled and reconstructed; Step 3: Dismantle the busbar bay process layer network equipment; Step 4: Remove the direct optical cable between the busbar compartment and the circuit breaker protection device in the adjacent compartment.

[0017] like Figure 1 and 2 As shown in the comparison, after the process layer switch of the adjacent interval is removed, the new circuit breaker protection device is directly connected to the process layer switch of the busbar interval through an optical cable; at the same time, the backup network interface is enabled in the process layer switch of the busbar interval, and the dedicated VLAN of the new circuit breaker protection device of the adjacent interval is divided in the switch, which ensures the mutual independence of the GOOSE information sent by the new circuit breaker protection device; the process layer switch of the adjacent interval can be removed smoothly, and the new circuit breaker protection can be compatible with the old busbar protection device after it is put into operation. The reliability and stability of the operation of the new and old equipment during the transformation process have been greatly improved.

[0018] The above method can solve the technical difficulties of process layer network dismantling construction encountered in the process of upgrading and transforming 500kV conventional smart stations into new generation autonomous and controllable smart stations. It can also ensure the technical difficulties of compatible operation of old and new equipment from the technical method level, ensure the normal operation of equipment under the network architecture of the new generation autonomous and controllable smart station, and take into account the normal operation of old equipment in 500kV conventional smart stations. It innovatively solves the problem of connection process between old and new equipment in transformation and upgrading.

Claims

1. A method for dismantling and reconstructing a process layer network of a 500kV intelligent station in a two-thirds wiring form, characterized in that: include: Enable the backup network interface VLAN on the process layer network switch of the bus bay that has not been dismantled and renovated; Re-lay the optical cable, and connect the inter-bay circuit breaker protection device through the busbar bay process layer network switch to ensure that the newly modified circuit breaker protection device can still access the process layer network of the intelligent station, and ensure that the inter-bay equipment can still transmit GOOSE information after removing its corresponding process layer network switch; After all new circuit breaker protection devices in adjacent bays are replaced and refitted, the process-layer network equipment in the busbar bay will be dismantled and taken out of operation together with the old busbar protection devices to ensure the compatible operation of the busbar protection devices and the circuit breaker protection devices in adjacent bays during the transition period of equipment transformation.

2. According to the method for dismantling and reconstructing the process layer network of a 500kV intelligent station in a two-thirds wiring form as described in claim 1, it is characterized in that: The backup network interface VLAN on the process layer network switch is a dedicated interface and a dedicated local area network of the process layer switch of the new circuit breaker protection device in the adjacent interval.

3. According to the method for dismantling and reconstructing the process layer network of a 500kV intelligent station in a two-thirds wiring form as described in claim 2, it is characterized in that: The specific steps of the demolition and reconstruction method are: Step 1: Lay a direct optical cable between the busbar bay process layer switch and the new circuit breaker protection device in the adjacent bay; Step 2: Configure the backup network interface VLAN on the bus bay process layer network switch; Step 3: The newly installed circuit breaker protection device in the adjacent bay is connected to the dedicated network interface of the process layer switch of the bus bay through a direct optical cable to realize GOOSE information transmission between the new circuit breaker protection device and the old bus protection device, so as to realize compatible operation between the new and old protection devices; Step 4: Remove the original process layer switches in the adjacent intervals.

4. According to the method for dismantling and reconstructing the process layer network of a 500kV intelligent station in a two-thirds wiring form as described in claim 3, it is characterized in that: The specific steps of dismantling and renovating the busbar interval process layer network equipment are as follows: Step 1: The installation and commissioning of the busbar protection device of the new generation of autonomous and controllable intelligent station is completed; Step 2: All circuit breaker protection devices in adjacent intervals of busbar protection are remodeled and reconstructed; Step 3: Dismantle the busbar bay process layer network equipment; Step 4: Remove the direct optical cable between the busbar compartment and the circuit breaker protection device in the adjacent compartment.

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