Method for automatic operation of a monitoring system for water supply filters of a Francis turbine generator set

Abstract

The application discloses an automatic operation method of a monitoring system of a water supply filter of a Francis turbine generator unit, and an automatic switching method of the automatic operation method, which comprises the following steps: when a method starting order of switching a technical water supply 2# filter to a 1# filter is received, it is detected whether the operation conditions are met, i.e. a local LCU automatic control mode, a filter control cabinet control mode in a remote place and no fault, no filter switching process, no torque protection action of inlet and outlet electric valves of the 1# filter and the 2# filter, and all the inlet and outlet electric valves of other filters being fully opened; if the operation conditions are met, the next step is performed; if the operation conditions are not met, an alarm is given and the operation method is exited; and the application is used for solving the problems of pressure fluctuation of a technical water supply system and equipment damage caused by the possibility of operation condition judgment error or improper operation steps of an operator.

Description

Technical Field

[0001] This invention relates to an automatic operation method for a monitoring system of a water supply filter for a mixed-flow hydro-generator unit. Background Technology

[0002] The technical water supply system for the 700MW mixed-flow turbine generator unit provides cooling water for its air coolers, guide bearing cooling systems, and pure water systems, ensuring efficient cooling and safe, stable operation. The technical water supply filter filters impurities to ensure the water quality meets requirements. Operation of the filter includes commissioning, shutdown, and replacement. This is typically determined by experienced operators based on their assessment of operating conditions. Operations are generally performed via opening and closing electric valves from the monitoring system and on-site, requiring precise control over the sequence of operations. Incorrect assessment of operating conditions or improper procedures can cause pressure fluctuations and equipment damage. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an automatic operation method for the monitoring system of water supply filter of mixed flow turbine generator set, which is used to solve the problem of pressure fluctuation and equipment damage caused by the possibility of operators making mistakes in judging operating conditions or improper operating procedures.

[0004] To solve the above problems, the technical solution of the present invention is as follows: An automatic operation method for a monitoring system of a water supply filter for a mixed-flow hydro-generator unit, including an automatic switching method, wherein the automatic switching method includes the following steps: Step 1: Upon receiving the start order for the method of switching the No. 2 filter to the No. 1 filter in the technical water supply, check whether the operating conditions are met: local LCU automatic control mode; filter control cabinet control mode remote and fault-free; no filter switching process; no torque protection action on the inlet and outlet electric valves of No. 1 and No. 2 filters; other filter inlet and outlet electric valves fully open; if the conditions are met, proceed to the next step; if the conditions are not met, alarm and exit the operation method. Step 2: Issue a command to open the electric valve at the outlet of filter #1. If the electric valve at the outlet of filter #1 is fully open within 1-3 minutes and no fault is reported, proceed to the next step of the operation method. If the condition is not met, an alarm will be triggered and the operation method will be exited. Step 3: Issue a command to open the inlet electric valve of filter #1. If the inlet electric valve of filter #1 is fully open within 1-3 minutes, no fault is reported, and the outlet flow rate of filter #1 is greater than 500m³ / h, the operation method ends. If the conditions are not met, an alarm is triggered and the operation method is exited.

[0005] Step 4: Issue a command to close the inlet electric valve of filter #2. If the inlet electric valve of filter #2 is fully closed within 1-3 minutes, no fault is reported, and the outlet flow rate of filter #2 is less than 10m³ / h, then proceed to the next step of the operation method. If the conditions are not met, an alarm will be triggered and the operation method will be exited. Step 5: Issue a command to close the electric valve at the outlet of filter #2. If the electric valve at the outlet of filter #1 is fully closed and no fault is reported within 1-3 minutes, the operation is complete. If the conditions are not met, an alarm will be triggered and the operation will be terminated.

[0006] The beneficial effects of this invention are as follows: This invention designs the required operation and replacement steps for the technical water supply filter replacement of a 700,000 kW mixed-flow turbine generator set into an automatic operation and automatic replacement method. Through this automatic operation and automatic replacement method, the operating conditions are judged, realizing the methodological operation and replacement of the technical water supply filter. The opening and closing sequence of the relevant electric valves is completed in the method, freeing up manpower, ensuring the accuracy of the entire operation process, and making the operation and replacement of the technical water supply filter more convenient and safer. Attached Figure Description

[0007] The invention will be further described below with reference to the accompanying drawings: Figure 1 This is the logic diagram of the present invention regarding the "automatic start-up operation permission of the No. 1 filter for technical water supply"; Figure 2 This is the logic diagram of the "Automatic Stop Operation Permission for Technical Water Supply Filter #1" in this invention; Figure 3 This is the logic diagram of the present invention regarding the "automatic switching of technical water supply filter #2 to filter #1 operation permission"; Figure 4 This is a diagram illustrating the automatic operation method of the No. 1 water supply filter according to the present invention; Figure 5 This is a diagram illustrating the automatic shutdown method of the No. 1 water supply filter according to the present invention; Figure 6 This is a diagram illustrating the method for automatically switching water supply filter #2 to filter #1 according to the present invention. Detailed Implementation

[0008] like Figures 1 to 6 As shown, the automatic operation method of the monitoring system for the water supply filter of a mixed-flow hydro-generator unit, including the steps of the automatic switching method, includes: 1. Automatic operation method for technical water supply filters (taking filter #1 as an example): Step 1: Upon receiving the start order for the automatic operation of the No. 1 filter in the technical water supply system, check whether the operating conditions are met: local LCU automatic control mode; remote and fault-free filter control cabinet control mode; no filter replacement process; no torque protection action on the inlet and outlet electric valves of the No. 1 filter. If these conditions are met, proceed to the next step; otherwise, an alarm will sound and the operation will be terminated. Step 2: Issue a command to open the electric valve at the outlet of filter #1. If the electric valve at the outlet of filter #1 is fully open within 2 minutes and no fault is reported, proceed to the next step of the operation method. If the condition is not met, an alarm will be triggered and the operation method will be exited. Step 3: Issue a command to open the inlet electric valve of filter #1. If the inlet electric valve of filter #1 is fully open within 2 minutes, no fault is reported, and the outlet flow rate of filter #1 is greater than 500m³ / h, the operation method ends. If the conditions are not met, an alarm is triggered and the operation method is exited.

[0009] 2. Automatic shutdown method for technical water supply filters (taking filter #1 as an example): Step 1: Upon receiving the start order for the automatic shutdown method of the No. 1 filter in the technical water supply system, check whether the operating conditions are met: local LCU automatic control mode; filter control cabinet control mode remote and fault-free; no filter switching process; no torque protection action on the inlet and outlet electric valves of the No. 1 filter; fully open inlet and outlet electric valves of the No. 2 filter; fully open inlet and outlet electric valves of the No. 3 filter. If the conditions are met, proceed to the next step; if not, trigger an alarm and exit the operating procedure. Step 2: Issue a command to close the inlet electric valve of filter #1. If the inlet electric valve of filter #1 is fully closed within 2 minutes, no fault is reported, and the outlet flow rate of filter #1 is less than 10m³ / h, then proceed to the next step of the operation method. If the conditions are not met, an alarm will be triggered and the operation method will be exited. Step 3: Issue a command to close the electric valve at the outlet of filter #1. If the electric valve at the outlet of filter #1 is fully closed and no fault is reported within 2 minutes, the operation is complete. If the conditions are not met, an alarm will be triggered and the operation will be terminated.

[0010] 3. Automatic switching method for technical water supply filters (taking the switching from filter #2 to filter #1 as an example): Step 1: Upon receiving the start order for the technical water supply filter #2 to filter #1 switchover, check if the following operating conditions are met: Local LCU automatic control mode; remote, fault-free filter control cabinet control mode; no filter switchover process; no torque protection activation of the inlet and outlet electric valves of filter #1; no torque protection activation of the inlet and outlet electric valves of filter #2; fully open inlet and outlet electric valves of filter #2; fully open inlet and outlet electric valves of filter #3. If these conditions are met, proceed to the next step. If not, trigger an alarm and exit the operation. Step 2: Issue a command to open the electric valve at the outlet of filter #1. If the electric valve at the outlet of filter #1 is fully open within 2 minutes and no fault is reported, proceed to the next step of the operation method. If the condition is not met, an alarm will be triggered and the operation method will be exited. Step 3: Issue a command to open the inlet electric valve of filter #1. If the inlet electric valve of filter #1 is fully open within 2 minutes, no fault is reported, and the outlet flow rate of filter #1 is greater than 500m³ / h, the operation method ends. If the conditions are not met, an alarm is triggered and the operation method is exited.

[0011] Step 4: Issue a command to close the inlet electric valve of filter #2. If the inlet electric valve of filter #2 is fully closed within 2 minutes, no fault is reported, and the outlet flow rate of filter #2 is less than 10m³ / h, then proceed to the next step of the operation method. If the conditions are not met, an alarm will be triggered and the operation method will be exited. Step 5: Issue a command to close the electric valve at the outlet of filter #2. If the electric valve at the outlet of filter #1 is fully closed and no fault is reported within 2 minutes, the operation is complete. If the conditions are not met, an alarm will be triggered and the operation will be terminated.

[0012] The automatic operation method of the technical water supply filter is designed to open the outlet electric valve first, then open the inlet electric valve and determine the outlet flow rate.

[0013] The automatic shutdown method for the technical water supply filter is designed to fully close the inlet electric valve, determine the outlet flow to ensure that the inlet electric valve is completely closed, and then fully close the inlet electric valve.

[0014] The automatic switching method for the technical water supply filter is designed so that the other set of filters is shut down only after the backup filter is in normal operation.

Claims

1. An automatic operation method for a monitoring system of a water supply filter for a mixed-flow hydro-generator unit, characterized in that: The method includes an automatic start-up method, which comprises the following steps: Step 1: Upon receiving the start order for the automatic operation of the No. 1 filter in the technical water supply system, check whether the operating conditions are met: local LCU automatic control mode; remote and fault-free filter control cabinet control mode; no filter replacement process; no torque protection action of the No. 1 filter inlet and outlet electric valves; if the conditions are met, proceed to the next step; if the conditions are not met, an alarm will sound and the operation will be terminated. Step 2: Issue a command to open the electric valve at the outlet of filter #1. If the electric valve at the outlet of filter #1 is fully open within 1-3 minutes and no fault is reported, proceed to the next step of the operation method. If the condition is not met, an alarm will be triggered and the operation method will be exited. Step 3: Issue a command to open the inlet electric valve of filter #1. If the inlet electric valve of filter #1 is fully open within 1-3 minutes, no fault is reported, and the outlet flow rate of filter #1 is greater than 500m³ / h, the operation method ends. If the conditions are not met, an alarm is triggered and the operation method is exited. It also includes an automatic switching method, which comprises the following steps: Step 1: Upon receiving the start order for the method of switching the No. 2 filter to the No. 1 filter in the technical water supply, check whether the operating conditions are met: local LCU automatic control mode; filter control cabinet control mode remote and fault-free; no filter switching process; no torque protection action on the inlet and outlet electric valves of No. 1 and No. 2 filters; other filter inlet and outlet electric valves fully open; if the conditions are met, proceed to the next step; if the conditions are not met, alarm and exit the operation method. Step 2: Issue a command to open the electric valve at the outlet of filter #1. If the electric valve at the outlet of filter #1 is fully open within 1-3 minutes and no fault is reported, proceed to the next step of the operation method. If the condition is not met, an alarm will be triggered and the operation method will be exited. Step 3: Issue a command to open the inlet electric valve of filter #1. If the inlet electric valve of filter #1 is fully open within 1-3 minutes, no fault is reported, and the outlet flow rate of filter #1 is greater than 500m³ / h, the operation method ends. If the conditions are not met, an alarm is triggered and the operation method is exited. Step 4: Issue a command to close the inlet electric valve of filter #2. If the inlet electric valve of filter #2 is fully closed within 1-3 minutes, no fault is reported, and the outlet flow rate of filter #2 is less than 10m³ / h, then proceed to the next step of the operation method. If the conditions are not met, an alarm will be triggered and the operation method will be exited. Step 5: Issue a command to close the electric valve at the outlet of filter #2. If the electric valve at the outlet of filter #1 is fully closed and no fault is reported within 1-3 minutes, the operation is complete. If the conditions are not met, an alarm will be triggered and the operation will be terminated.

2. The automatic operation method of the water supply filter monitoring system for a mixed-flow hydro-generator unit according to claim 1, characterized in that: It also includes an automatic shutdown method, which includes the following steps: Step 1: Upon receiving the start order for the automatic shutdown method of the No. 1 filter in the technical water supply, check whether the operating conditions are met: local LCU automatic control mode; filter control cabinet control mode is remote and fault-free; no filter switching process; no torque protection action of the No. 1 filter inlet and outlet electric valves; other filter inlet and outlet electric valves are fully open; if the conditions are met, proceed to the next step; if the conditions are not met, alarm and exit the operating method. Step 2: Issue a command to close the inlet electric valve of filter #1. If the inlet electric valve of filter #1 is fully closed within 1-3 minutes, no fault is reported, and the outlet flow rate of filter #1 is less than 10m³ / h, then proceed to the next step of the operation method. If the conditions are not met, an alarm will be triggered and the operation method will be exited. Step 3: Issue a command to close the electric valve at the outlet of filter #1. If the electric valve at the outlet of filter #1 is fully closed and no fault is reported within 1-3 minutes, the operation is complete. If the conditions are not met, an alarm will be triggered and the operation will be terminated.

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