Method for preventing misoperation of tail water disc type valve of power station unit and desilting hole

Abstract

The application provides a method for preventing misoperation of a hydropower station unit and a tail water disc type valve of a sand discharge hole, comprising the following steps: step one, collecting monitoring signals; step two, adding a computer monitoring system function button; step three, adding a hydropower station unit and a tail water disc type valve control module in the computer monitoring system; step four, setting functions of the hydropower station unit and the tail water disc type valve control module; and step five, running process of misoperation of the hydropower station unit and the tail water disc type valve. The method introduces an operation locking condition and increases the state monitoring and control functions of the monitoring system, so as to avoid the risk of flooding the plant due to human factors and ensure the safe operation of the hydropower station.

Description

Technical Field

[0001] This invention relates to the field of hydropower station unit maintenance technology, specifically to a method for preventing misoperation of hydropower station units and tailrace disc valves of sand discharge holes. Background Technology

[0002] When hydropower station units or desilting holes are being repaired in the tailrace channel, the tailrace disc valves need to be opened to drain the water in the channel in order to carry out the repair work. During the repair of the units or desilting holes, the disc valves need to be kept open to promptly drain any leaks from the upstream gates, so as to avoid excessive water accumulation in the channel and flooding of the powerhouse.

[0003] However, when opening the tailrace disc valves of maintenance equipment requiring drainage, the already opened disc valves must be temporarily closed to prevent sudden increases in leakage and flooding of the plant. Currently, the monitoring system cannot monitor the status of the tailrace disc valves; it relies solely on operators checking the duty logs to obtain information. The maintenance department is then notified to close all opened tailrace disc valves. Whether a disc valve is fully closed is determined by on-site personnel based on experience and mechanical readings. Maintenance personnel then open the disc valves of the units requiring drainage or the sand discharge holes to drain the flow channels. This entire process is manual, and especially when there is a large number of maintenance units, there is a high risk of operators missing information or maintenance personnel making mistakes, resulting in some open tailrace disc valves being partially or completely closed. Summary of the Invention

[0004] To address this issue, this invention proposes a solution to prevent misoperation of hydropower station units and tailrace disc valves. This method adds status monitoring and control functions to the monitoring system and introduces operational interlocking conditions to avoid the risk of flooding of the powerhouse due to human error, thus ensuring the safe operation of the hydropower station.

[0005] To achieve the above-mentioned technical features, the objective of this invention is as follows: A method for preventing misoperation of the tailrace disc valve of a hydropower station unit and its sediment discharge hole, comprising the following steps:

[0006] Step 1: Acquisition of monitoring signals;

[0007] Step two: Adding function buttons to the computer monitoring system;

[0008] Step 3: Add a control module for the hydropower station unit and tailrace disc valve of the sand discharge hole to the computer monitoring system;

[0009] Step 4: Function settings for the control modules of the hydropower station unit and the tailrace disc valve of the sand discharge hole;

[0010] Step 5: Operation process of maloperation of hydropower station units and tailrace disc valves of sand discharge holes.

[0011] The specific operation process in step one is as follows: send the joint signals of all units and sand discharge disc valves in the entire plant into the computer monitoring system.

[0012] Set the computer logic judgment value of all joint signals of the tailrace disc valves of all units in the plant to "1", otherwise set it to "0";

[0013] Set the computer logic judgment value of all joint points of the tailwater disc valves of all sand discharge holes in the whole plant to "1", otherwise set it to "0".

[0014] The specific operation process in step two is as follows: add a "tailwater maintenance and drainage completed" function enable / disable button to the computer monitoring system, and send the "tailwater maintenance and drainage completed" node information to the computer monitoring system.

[0015] During the maintenance and drainage of the hydropower station, the computer logic judgment value of the "Tailwater Maintenance and Drainage Completed" function activation / deactivation button is set to "0"; when the maintenance and drainage of the hydropower station is completed, the computer logic judgment value of the "Tailwater Maintenance and Drainage Completed" function activation / deactivation button is set to "1".

[0016] The functional implementation process of the tailrace disc valve control module of the hydropower station unit and the sand discharge hole in step four is as follows: the operation command to open the tailrace disc valve and the sand discharge hole disc valve of all units is introduced into the interlocking control logic that all tailrace disc valves and the sand discharge hole disc valves of all units in the plant must be in the fully closed state of "1" or the "tailrace maintenance and drainage completed" state of "1".

[0017] The beneficial effects of this invention are as follows:

[0018] The present invention proposes a solution to prevent misoperation of tailrace disc valves in hydropower station units and desilting holes. This solution addresses the current problem that manual work is often required in this area, and that the determination of whether the disc valve is fully closed is based on the experience of staff on-site using mechanical scales. Especially when there is a lot of equipment to be maintained, there is a high possibility that the tailrace disc valve may be partially or fully closed due to omissions in notification from operators or misjudgments by maintenance personnel. This solution reduces manual operation, improves operational safety and reliability, and ensures the safe operation of the hydropower station. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 The monitoring system unit and tailwater disc valve opening and closing logic conditions of the present invention are as follows. Detailed Implementation

[0021] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0022] Example 1:

[0023] The present invention proposes a solution to prevent misoperation of hydropower station units and tailrace disc valves at the desilting outlet. This solution integrates all joints of the plant's units and tailrace disc valves into a computer monitoring system. A "tailrace maintenance drainage completed" function is added to the monitoring system, and a new control module for the units and tailrace disc valves at the desilting outlet is added to the existing computer monitoring system screen. This control module closes all hydropower station units or tailrace disc valves at the desilting outlet, introducing an interlocking condition. This avoids the risk of flooding the powerhouse due to human error, ensuring the safe operation of the hydropower station. Compared to previous operating methods, this solution is safer, more reliable, and less prone to omissions.

[0024] Example 2:

[0025] Please see Figure 1 A method for preventing misoperation of tailrace disc valves in hydropower station generating units and desilting holes includes the following steps:

[0026] Step 1: Acquisition of monitoring signals;

[0027] The specific operation process in step one is as follows: send the joint signals of all units and sand discharge disc valves in the entire plant into the computer monitoring system.

[0028] Set the computer logic judgment value of all joint signals of the tailrace disc valves of all units in the plant to "1", otherwise set it to "0";

[0029] Set the computer logic judgment value of all joint points of the tailwater disc valves of all sand discharge holes in the whole plant to "1", otherwise set it to "0".

[0030] Step two: Adding function buttons to the computer monitoring system;

[0031] Add a "Tailwater maintenance and drainage completed" function enable / disable button to the computer monitoring system, and send the "Tailwater maintenance and drainage completed" node information into the computer monitoring system.

[0032] During the maintenance and drainage of the hydropower station, the computer logic judgment value of the "Tailwater Maintenance and Drainage Completed" function activation / deactivation button is set to "0"; when the maintenance and drainage of the hydropower station is completed, the computer logic judgment value of the "Tailwater Maintenance and Drainage Completed" function activation / deactivation button is set to "1".

[0033] Step 3: Add a control module for the hydropower station unit and tailrace disc valve of the sand discharge hole to the computer monitoring system;

[0034] Step 4: Function settings for the control modules of the hydropower station unit and the tailrace disc valve of the sand discharge hole;

[0035] The functional implementation process of the tailrace disc valve control module of the hydropower station unit and the sand discharge hole in step four is as follows: the operation command to open the tailrace disc valve and the sand discharge hole disc valve of all units is introduced into the interlocking control logic that all tailrace disc valves and the sand discharge hole disc valves of all units in the plant must be in the fully closed state of "1" or the "tailrace maintenance and drainage completed" state of "1".

[0036] Step 5: Operation process of maloperation of hydropower station units and tailrace disc valves of sand discharge holes.

Claims

1. A method for preventing misoperation of the tailrace disc valve of a hydropower station generating unit and a sand discharge hole, characterized in that, Includes the following steps: Step 1: Acquisition of monitoring signals; Set the computer logic judgment value of all joint signals of the tailrace disc valves of all units in the plant to "1"; otherwise, set it to "0". Set the computer logic judgment value of all joint points of the tailrace disc valves of all sand discharge holes in the whole plant to "1", otherwise set it to "0"; Step two: Adding function buttons to the computer monitoring system; Add a "Tailwater maintenance and drainage completed" function enable / disable button to the computer monitoring system, and send the "Tailwater maintenance and drainage completed" node information into the computer monitoring system; Step 3: Add a control module for the hydropower station unit and tailrace disc valve of the sand discharge hole to the computer monitoring system; During the maintenance and drainage of the hydropower station, the computer logic judgment value of the "Tailwater Maintenance and Drainage Completed" function activation / deactivation button is set to "0"; when the maintenance and drainage of the hydropower station is completed, the computer logic judgment value of the "Tailwater Maintenance and Drainage Completed" function activation / deactivation button is set to "1". Step 4: Function settings for the control modules of the hydropower station unit and the tailrace disc valve of the sand discharge hole; The functional implementation process of the tailrace disc valve control module of the hydropower station unit and the sand discharge hole in step four is as follows: the operation command to open the tailrace disc valve of all units and the tailrace disc valve of the sand discharge hole is introduced into the interlocking control logic that all the tailrace disc valves of all units and the tailrace disc valve of the sand discharge hole in the whole plant must be in the "1" state or the "tailrace maintenance drainage completed" state is "1". Step 5: Preventing maloperation of hydropower station units and tailrace disc valves at the sand discharge outlet.

2. The method for preventing misoperation of the tail water disc type valve of the hydroelectric generating set and the sand discharge hole according to claim 1, characterized in that, The specific operation process in step one is as follows: send the joint signals of all units and tailwater disc valves of the entire plant into the computer monitoring system.

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