Method for upgrading and rebuilding 500kV intelligent station in three-second wiring form

Abstract

The invention provides a 500kV intelligent station upgrading and reconstruction method in a 3 / 2 wiring form, which belongs to the technical field of power grid upgrading and reconstruction and comprises the following steps of: 1, powering off a bus to be reconstructed; 2, installing a new bus protection device; 3, installing a GOOSE (generic object oriented substation event) switch; 4, configuring independent SV and GOOSE optical ports for the old bus protection by the transformed side switch acquisition execution unit; 5, updating the configuration of the side switch acquisition execution unit; 6-9, releasing an optical cable; and 10, commissioning after the test. By additionally arranging transition equipment and reasonably planning interface configuration, bus protection transformation of an autonomous controllable new-generation intelligent station is safely and reliably completed.

Description

Technical Field

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

[0002] When performing busbar protection in a 500kV smart substation with two-thirds wiring, the original network architecture is used, and the current merging unit and smart terminal of the edge switch are retained. The transformation steps are as follows: Step 1: Stop all busbars to be transformed; Step 2: Remove the old busbar protection device and replace it with a new one; Step 3: Update the configuration of the new busbar protection device; Step 4: Update the configuration of the edge switch current merging unit; Step 5: Update the configuration of the side switch circuit breaker protection device; Step 6: Update the configuration of the smart terminal while switching on and off; Step 7: Verify the new busbar protection device and conduct whole group test and transmission test.

[0003] According to the current development trend, the protection transformation of 500kV smart substations must meet the needs of a new generation of autonomous and controllable substations. The significant changes are: 1) The network architecture changes, and the process layer network is cancelled; 2) The merging unit and the smart terminal are cancelled, and the functions of the merging unit and the smart terminal are realized by the acquisition execution unit.

[0004] Problems encountered in busbar protection transformation when upgrading 500kV smart stations with 3 / 2 wiring to autonomous and controllable new generation smart stations: 1) After the new generation transformation of some bays is completed, the merging unit and intelligent terminal of the side switch are transformed into the collection and execution unit, and the remaining bays are not transformed. The old busbar protection device needs to be connected to the collection and execution unit, merging unit and intelligent terminal at the same time to realize the current collection and tripping output of each bay; 2) After some bays have completed the new generation transformation, the process layer network is cancelled, while some bays have not been transformed and the process layer network is retained. The old busbar protection device needs to realize the cross-bay transmission of the switching quantity between the side switch circuit breaker protection in this state; 3) After all bays have completed the new generation transformation, the new busbar protection device cannot quickly replace the old busbar protection device.

[0005] In summary, the existing 3 / 2 connection 500kV smart substation busbar transformation method is not suitable for the autonomous and controllable new generation substation. Summary of the invention

[0006] The present invention provides a 500kV smart station upgrading and reconstruction method in a two-thirds wiring form, which solves the problems in the upgrading and reconstruction process of the above-mentioned smart station.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is: A method for upgrading and reconstructing a 500 kV intelligent station in a two-thirds wiring form comprises the following steps: Initial state: The smart substation with two-thirds wiring has not been modified; Step 0: Bay 1 has completed the new generation transformation, the edge switch current merging unit and the intelligent terminal have been replaced with the acquisition execution unit, and the process layer switch of Bay 1 has been removed; Step 1: Shut down the busbar to be transformed; Step 2: Install a new busbar protection device in the busbar protection compartment and complete the new busbar protection configuration to facilitate the subsequent replacement of the old and new busbar protections; Step 3: Since some bays have completed the new generation transformation, in order to meet the needs of cross-bay transmission of GOOSE information of the old bus protection, a new GOOSE switch is installed in the bus protection bay and the switch configuration is completed; Step 4: Since some bays have been renovated to the new generation, in order to meet the transmission requirements of SV sampling information and GOOSE tripping information of the old bus protection, the renovated edge switch acquisition execution unit is configured with independent SV and GOOSE optical ports for the old bus protection to meet the independent configuration requirements of SV and GOOSE of the old bus protection; Step 5: The old busbar protection device is updated with the configuration of the modified edge switch acquisition execution unit; Step 6: Lay the optical cable to connect the old busbar protection and the newly installed GOOSE switch; Step 7: Lay the optical cable to connect the side switch circuit breaker protection of the modified bay and the newly installed GOOSE switch to realize the cross-bay transmission path of the old bus protection GOOSE information; Step 8: Lay out the optical cable, which connects the old bus protection and the GOOSE optical port of the modified edge switch acquisition execution unit to realize the GOOSE information transmission path of the old bus protection tripping command; Step 9: Lay out the optical cable, which is connected to the SV optical port of the old bus protection and the modified edge switch acquisition execution unit to realize the old bus protection current SV information transmission path; Step 10: Check the old busbar protection device, and conduct a whole set test and transmission test. The busbar will be put into operation after the test results are correct.

[0008] After the above step 10 is completed, when each new generation transformation of an interval is completed, steps 4 to 10 are repeated until all intervals have completed the new generation transformation.

[0009] After all the above-mentioned interval reconstruction is completed, the old busbar protection device is removed and the new busbar protection device is put into operation. Current status: All the current merging units and intelligent terminals of the side switches in all intervals have been cancelled and replaced with collection execution units; all the process layer switches in all intervals have been removed, and the side switch circuit breaker protection has been connected to the station control layer network to realize the cross-interval transmission of GOOSE information; Step 11: Shut down the busbar to be transformed; Step 12: Remove the old busbar protection device; Step 13: Remove the GOOSE switch installed in the busbar protection compartment in step 3; Step 14: Clear all optical cables connected to the old busbar protection and acquisition execution units and GOOSE switches; Step 15: Update the side switch circuit breaker protection to match the new busbar protection configuration; Step 16: Since the edge switch acquisition execution unit supports SV and GOOSE common port transmission, update the edge switch acquisition execution unit configuration, cancel the SV optical port and GOOSE optical port used for the old bus protection, and configure the SV and GOOSE common port transmission optical port for the new bus protection; Step 17: Lay out the optical cable, which connects the new bus protection and the station control layer network to realize the cross-interval transmission path of the new bus protection GOOSE information; Step 18: Lay out the optical cable, which is connected to the new bus protection and edge switch acquisition execution unit SV, GOOSE common transmission optical port to realize the transmission path of the new bus protection trip command GOOSE information and current SV information; Step 19: After all the new busbar protection connection work is completed, calibrate the new busbar protection device, and conduct a whole set test and transmission test. The busbar will be put into operation after the test results are correct.

[0010] The present invention provides a 500kV intelligent station upgrading and reconstruction method in a two-thirds wiring form, which has the following beneficial effects: 1. When upgrading the 500kV smart station with 3 / 2 wiring to a new generation of autonomous and controllable smart station, the compatibility problem between the old and new equipment should be solved during the busbar protection transformation to ensure the stable operation of the old and new equipment; 2. It does not affect the intelligent architecture of the original intelligent station secondary equipment, ensuring the stable operation of the two intelligent station architectures; 3. Ensure stable and reliable transmission of busbar protection SV sampling information and cross-interval GOOSE information; 3. Ensure the safety and operability of busbar protection transformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: Figure 1 This is a simplified diagram of the busbar protection architecture before the new generation transformation; Figure 2 This is a simplified diagram of the busbar protection architecture when bay 1 completes the new generation transformation; Figure 3 Simplified diagram of the busbar protection architecture when the new generation retrofit is completed for all bays. DETAILED DESCRIPTION

[0012] 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.

[0013] A method for upgrading and reconstructing a 500 kV intelligent station in a two-thirds wiring form comprises the following steps: Initial state: The 500kV smart station with 3 / 2 wiring has not been transformed into a new generation of autonomous controllable power supply; Step 0: Bay 1 has completed the new generation transformation, the edge switch current merging unit and the intelligent terminal have been replaced with the acquisition execution unit, and the process layer switch of Bay 1 has been removed; Step 1: Shut down the busbar to be transformed; Step 2: Install a new busbar protection device in the busbar protection compartment and complete the new busbar protection configuration to facilitate the subsequent replacement of the old and new busbar protections; Step 3: Since some bays have completed the new generation transformation, in order to meet the cross-bay transmission requirements of the old bus protection GOOSE information, a new GOOSE switch is installed in the bus protection bay, the switch configuration is completed, and the switch is connected to the bus bay process layer switch; Step 4: Clear the optical cables connecting the old bus protection and the bus bay process layer switch; Step 5: Since some bays have been renovated to the new generation, in order to meet the transmission requirements of SV sampling information and GOOSE tripping information of the old bus protection, the renovated edge switch acquisition execution unit is configured with independent SV and GOOSE optical ports for the old bus protection to meet the independent configuration requirements of SV and GOOSE of the old bus protection; Step 6: The old busbar protection device is updated with the configuration of the edge switch acquisition execution unit of the modified bay to ensure normal communication of SV and GOOSE information between the old busbar protection device and the acquisition execution unit; Step 7: Lay the optical cable to connect the old busbar protection and the newly installed GOOSE switch; Step 8: Lay the optical cable to connect the side switch circuit breaker protection of the modified bay and the newly installed GOOSE switch. Step 7-Step 8 realizes the cross-bay transmission path of the old bus protection GOOSE information; Step 9: Lay out the optical cable, which connects the old bus protection and the GOOSE optical port of the modified edge switch acquisition execution unit to realize the GOOSE information transmission path of the old bus protection tripping command; Step 10: Lay out an optical cable, which is connected to the SV optical port of the old bus protection and the modified edge switch acquisition execution unit to realize the SV information transmission path of the old bus protection current; Step 11: Check the old busbar protection device, and conduct a whole set test and transmission test. The busbar will be put into operation after the test results are correct to ensure that the busbar protection functions correctly after being put into operation.

[0014] After the above step 11 is completed, when each interval that needs to be added to complete the new generation transformation is added, steps 5 to 11 are repeated until all intervals have completed the new generation transformation.

[0015] After all the above intervals are increased, we have: Current status: All the current merging units and intelligent terminals of the side switches in all intervals have been cancelled and replaced with collection execution units; all the switches at the process layer of all intervals have been removed, and the side switch circuit breaker protection has been connected to the station control layer network. The busbar protection and the side switch circuit breaker protection can realize the GOOSE information transmission across intervals on the station control layer network; Step 12: Shut down the busbar to be transformed; Step 13: Remove the old busbar protection device; Step 14: Remove the GOOSE switch added in the busbar protection interval in step 3; Step 15: Clear all optical cables connected to the old busbar protection and acquisition execution unit and the newly added GOOSE switch; Step 16: Clear all optical cables connected to the edge switch circuit breaker protection and the newly added GOOSE switch; Step 17: The side switch circuit breaker protection is updated with the new busbar protection configuration to ensure normal communication of GOOSE information between the side switch circuit breaker protection and the new busbar protection; Step 18: Since the edge switch acquisition execution unit supports SV and GOOSE common port transmission, update the edge switch acquisition execution unit configuration, cancel the SV optical port and GOOSE optical port used for the old bus protection, and configure the SV and GOOSE common port transmission optical port for the new bus protection to ensure that the new bus protection and the edge switch acquisition execution unit GOOSE and SV information communicate normally; Step 19: Lay the optical cable, which connects the new bus protection and the station control layer network to realize the cross-interval transmission path of GOOSE information between the new bus protection and the edge switch circuit breaker protection; Step 20: Lay out the optical cable, which is connected to the new bus protection and edge switch acquisition execution unit SV and GOOSE common transmission optical port to realize the transmission path of the new bus protection trip command GOOSE information and current SV information; Step 21: After all the new busbar protection connections are completed, calibrate the new busbar protection device, and conduct a whole set test and transmission test. The busbar will be put into operation after the test results are correct to ensure that the busbar protection functions correctly after commissioning.

[0016] In a two-thirds wiring intelligent station, the process layer switch of the bus protection interval and the process layer switches of each interval are networked to form a process layer network; the station control layer switch of the bus protection interval and the station control layer switches of each interval are networked to form a station control layer network.

[0017] Embodiment 1: Initial state: The smart substation with two-thirds wiring has not been modified; Step 0: Bay 1 has completed the new generation transformation, the edge switch current merging unit and the intelligent terminal have been replaced with the acquisition execution unit, and the process layer switch of Bay 1 has been removed; Step 1: Shut down the busbar to be transformed; Step 2: Install the new busbar protection device in the busbar protection compartment and complete the new busbar protection configuration; Step 3: Since some bays have been renovated to the new generation, in order to meet the needs of cross-bay transmission of GOOSE information of the old bus protection, a new GOOSE switch is installed in the bus protection bay and the switch configuration is completed.

[0018] Step 4: Since some bays have been renovated to the new generation, in order to meet the transmission requirements of SV sampling information and GOOSE tripping information of the old bus protection, the renovated edge switch acquisition execution unit is configured with independent SV and GOOSE optical ports for the old bus protection to meet the independent configuration requirements of SV and GOOSE of the old bus protection.

[0019] Step 5: The old busbar protection device is updated with the configuration of the modified edge switch acquisition execution unit; Step 6: Lay the optical cable to connect the old busbar protection and the newly installed GOOSE switch; Step 7: Lay the optical cable to connect the side switch circuit breaker protection of the modified bay and the newly installed GOOSE switch to realize the cross-bay transmission path of the old bus protection GOOSE information; Step 8: Lay out the optical cable, which connects the old bus protection and the GOOSE optical port of the modified edge switch acquisition execution unit to realize the GOOSE information transmission path of the old bus protection tripping command; Step 9: Lay out the optical cable, which is connected to the SV optical port of the old bus protection and the modified edge switch acquisition execution unit to realize the old bus protection current SV information transmission path; Step 10: Check the old busbar protection device, and conduct a whole set test and transmission test. The busbar will be put into operation after the test results are correct.

[0020] The current busbar protection architecture diagram is attached. Figure 1 .

[0021] Repeat steps: For each new interval that has completed the new generation transformation, repeat the above steps 4 to 10 until all intervals have completed the new generation transformation.

[0022] Current status: All the current merging units and intelligent terminals of the side switches in all intervals have been cancelled and replaced with collection execution units. All the process layer switches in all intervals have been removed, and the side switch circuit breaker protection has been connected to the station control layer network to realize the cross-interval transmission of GOOSE information.

[0023] Step 11: Shut down the busbar to be transformed; Step 12: Remove the old busbar protection device; Step 13: Remove the GOOSE switch installed in the busbar protection compartment in step 3; Step 14: Clear all optical cables connected to the old busbar protection and acquisition execution units and GOOSE switches; Step 15: Update the side switch circuit breaker protection to match the new busbar protection configuration; Step 16: Since the edge switch acquisition execution unit supports SV and GOOSE common port transmission, update the edge switch acquisition execution unit configuration, cancel the SV optical port and GOOSE optical port used for the old bus protection, and configure the SV and GOOSE common port transmission optical port for the new bus protection; Step 17: Lay out the optical cable, which connects the new bus protection and the station control layer network to realize the cross-interval transmission path of the new bus protection GOOSE information; Step 18: Lay out the optical cable, which is connected to the new bus protection and edge switch acquisition execution unit SV, GOOSE common transmission optical port to realize the transmission path of the new bus protection trip command GOOSE information and current SV information; Step 19: After all the new busbar protection connection work is completed, calibrate the new busbar protection device, and conduct a whole set test and transmission test. The busbar will be put into operation after the test results are correct.

[0024] The final busbar protection architecture diagram is attached. Figure 3 .

Claims

1. A method for upgrading and reconstructing a 500kV intelligent station in a two-thirds wiring form, characterized in that: The following steps are involved: Initial state: The smart substation with two-thirds wiring has not been modified; Step 0: Bay 1 has completed the new generation transformation, the edge switch current merging unit and the intelligent terminal have been replaced with the acquisition execution unit, and the process layer switch of Bay 1 has been removed; Step 1: Shut down the busbar to be transformed; Step 2: Install the new busbar protection device in the busbar protection compartment and complete the new busbar protection configuration; Step 3: Install a new GOOSE switch in the busbar protection compartment and complete the switch configuration; Step 4: The modified edge switch acquisition execution unit is configured with independent SV and GOOSE optical ports for the old bus protection to meet the independent configuration requirements of SV and GOOSE for the old bus protection; Step 5: The old busbar protection device is updated with the configuration of the modified edge switch acquisition execution unit; Step 6: Lay the optical cable to connect the old busbar protection and the newly installed GOOSE switch; Step 7: Lay the optical cable to connect the side switch circuit breaker protection of the modified bay and the newly installed GOOSE switch to realize the cross-bay transmission path of the old bus protection GOOSE information; Step 8: Lay out the optical cable, which connects the old bus protection and the GOOSE optical port of the modified edge switch acquisition execution unit to realize the GOOSE information transmission path of the old bus protection tripping command; Step 9: Lay out the optical cable, which is connected to the SV optical port of the old bus protection and the modified edge switch acquisition execution unit to realize the old bus protection current SV information transmission path; Step 10: Check the old busbar protection device, and conduct a whole set test and transmission test. The busbar will be put into operation after the test results are correct.

2. According to the method for upgrading and reconstructing a 500kV intelligent station with a two-thirds wiring form as described in claim 1, it is characterized in that: After step 10 is completed, each time a new generation of transformation of an interval is completed, steps 4 to 10 are repeated until all intervals have completed a new generation of transformation.

3. According to the method for upgrading and reconstructing a 500kV intelligent station with a two-thirds wiring form as described in claim 2, it is characterized in that: After all the bay reconstructions are completed, the old busbar protection device is removed and the new busbar protection device is put into operation, including: Current status: All the current merging units and intelligent terminals of the side switches in all intervals have been cancelled and replaced with collection execution units; all the process layer switches in all intervals have been removed, and the side switch circuit breaker protection has been connected to the station control layer network to realize the cross-interval transmission of GOOSE information; Step 11: Shut down the busbar to be transformed; Step 12: Remove the old busbar protection device; Step 13: Remove the GOOSE switch installed in the busbar protection compartment in step 3; Step 14: Clear all optical cables connected to the old busbar protection and acquisition execution units and GOOSE switches; Step 15: Update the side switch circuit breaker protection to match the new busbar protection configuration; Step 16: Since the edge switch acquisition execution unit supports SV and GOOSE common port transmission, update the edge switch acquisition execution unit configuration, cancel the SV optical port and GOOSE optical port used for the old bus protection, and configure the SV and GOOSE common port transmission optical port for the new bus protection; Step 17: Lay out the optical cable, which connects the new bus protection and the station control layer network to realize the cross-interval transmission path of the new bus protection GOOSE information; Step 18: Lay out the optical cable, which is connected to the new bus protection and edge switch acquisition execution unit SV, GOOSE common transmission optical port to realize the transmission path of the new bus protection trip command GOOSE information and current SV information; Step 19: After all the new busbar protection connection work is completed, calibrate the new busbar protection device, and conduct a whole set test and transmission test. The busbar will be put into operation after the test results are correct.

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