CN-116837794-B - Design method and system for multi-redundancy quick-closing channel of quick door of giant hydropower station

CN116837794BCN 116837794 BCN116837794 BCN 116837794BCN-116837794-B

Abstract

The invention discloses a design method and a system for a quick door multi-redundancy quick closing channel of a giant hydropower station, which comprise the steps of judging a quick door falling through a PLC program of a unit LCU, making a signal for opening the quick door falling through a computer monitoring system according to the PLC program of the unit LCU, protecting a door falling button of the unit LCU by a water machine, protecting a water machine backup by a water machine, enabling the follow-up action to be consistent with the door falling button of the unit LCU, simulating a water flooding factory building button action of a main factory building of the LCU, switching a liquid level of the water flooding factory building, enabling the liquid level of the water flooding factory building to be consistent with the water flooding factory building button action of the main factory building of the LCU, and completing the quick door falling according to the signal. The invention ensures that the distance is no longer limited by the design of a hard-wired loop through the optical fiber communication of the double-loop network in the LCU and the design of the remote cabinet of the water inlet, and the single landing channel has backup redundancy through the optical fiber communication of the double-loop network in the LCU.

Inventors

GONG LONGYAN
LI YINBIN
ZHANG DONGFENG
CHEN JIAWEI
GAO PAN
YANG XUAN
TIAN MAOTING
CUI MIN
LI JIANHUI
DONG GANG

Assignees

三峡金沙江云川水电开发有限公司

Dates

Publication Date: 20260505
Application Date: 20230616

Claims (8)

1. A design method of a quick door multi-redundancy quick-closing channel of a giant hydropower station is characterized by comprising the steps of judging a quick door falling by a PLC program of a unit LCU; the computer monitoring system gives out a signal for opening the quick door according to a PLC program of the unit LCU; according to the signals, the unit LCU local cabinet water machine protection door falling button acts; The water machine is backed up and protected, and the follow-up action is consistent with the action of a water machine protection door-falling button of the LCU local cabinet of the unit; simulating button actions of a local cabinet flooding factory building of the LCU main factory building; The liquid level switch of the anti-flooding factory building acts and is consistent with the button action of the local cabinet flooding factory building of the LCU main factory building of the analog screen; the central control room quick door falling button acts to finish quick door falling; The judging conditions of the quick door falling include, When the rotating speed of the unit is greater than 115% and the shear pin of the unit shears off, the door is quickly opened; When the rotating speed of the unit is greater than 115% and the machine of the unit is in overspeed action, the door of the quick door falls off; when the opening of the quick door is lower than 90%, the analog quantity channel of the quick door is normal, the quick door gate slides down by 600mm, and the quick door sliding down and lifting fails; when the emergency stop flow is started and the second step of the emergency stop flow is timed out, the door is quickly opened; When the quick shutdown process is started and the first step of quick shutdown is overtime or the shear pin is sheared off, the quick door falls off; The quick door falling method comprises the steps that an independent control unit is adopted, the quick door at the water inlet of each unit is controlled by a set of independent control unit, the quick door is connected with a remote I/O cabinet at the water inlet of the LCU of the unit through a network cable, and two door falling modes of manual and program control are adopted; when the PLC device of the quick door hoist control cabinet acquires a door falling signal through the door opening and closing module, the PLC door opening module opens the signal to the door falling of the opening relay.
2. The method for designing the multi-redundancy quick closing channel of the quick door of the giant hydropower station according to claim 1, wherein the step of making an opening signal of the quick door of the giant hydropower station according to a PLC program of the LCU of the unit comprises the steps of opening three paths of signals, wherein two paths of signals are sent into a remote I/O cabinet at a water inlet of the LCU of the unit through optical fiber communication, and the remote I/O cabinet at the water inlet of the unit sends the opening signal to a PLC of the quick door hoist and a solenoid valve of the quick door through two paths of opening relays; the other path of signals sent by the unit LCU are sent to a simulation screen LCU local cabinet positioned on a main plant generator layer through hard wiring, the signals are sent to a simulation screen LCU water inlet remote cabinet through optical fiber communication by the local cabinet, and the two paths of signals sent by the simulation screen LCU water inlet remote cabinet are sent to a quick door PLC and a quick door electromagnetic valve through hard wiring.
3. The method for designing the quick door multiple redundancy quick closing channel of the giant hydropower station according to claim 2, wherein the water machine protection door falling button of the unit LCU local cabinet comprises button joints which are respectively sent to the unit LCU local cabinet and the simulation screen LCU main plant local cabinet through hard wiring.
4. The method for designing the rapid door multiple redundancy quick closing channel of the giant hydropower station as claimed in claim 3, wherein the buttons of the local cabinet flooding factory building of the LCU of the simulation screen comprise button joints which are respectively sent to the local cabinet of the LCU of the unit through hard wiring and sent to the remote cabinet of the water inlet of the LCU of the simulation screen through optical fiber communication.
5. The method of claim 4, wherein the central control room quick door falling button comprises a simulation screen LCU local cabinet, a door falling signal is sent to a main plant simulation screen LCU local cabinet through optical fiber communication, a signal is sent to a unit LCU local cabinet through hard wiring by the main plant simulation screen LCU local cabinet, and the signal is sent to a simulation screen LCU water inlet remote cabinet through optical fiber communication.
6. A rapid closing channel design system adopting the rapid door multi-redundancy rapid closing channel design method of a huge hydropower station as claimed in any one of claims 1 to 5 is characterized by further comprising, The input module is used for acquiring signals; the opening module is used for opening the signal to the opening relay falling door; the CPU module is used for program calculation and signal processing; and the optical fiber communication module is used for forming a double-ring network and sending the opening signal to a remote I/O cabinet at the water inlet of the LCU of the unit.
7. A computer device comprising a memory and a processor, said memory storing a computer program, characterized in that the processor implements the steps of the method according to any one of claims 1-5 when executing said computer program.
8. A computer-readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method according to any one of claims 1-5.

Description

Design method and system for multi-redundancy quick-closing channel of quick door of giant hydropower station Technical Field The invention relates to the field of control of a quick gate of a giant hydroelectric generating set, in particular to a design method and a system of a quick gate multi-redundancy quick-closing channel of a giant hydroelectric station. Background In a hydropower station, a rapid gate is an important hydraulic facility, plays an important role in safe and stable operation of a unit, and is the last safe defense line for preventing the unit from flying and protecting and flooding the plant. When a certain accident of the unit gets rid of load, the speed regulating system refuses to act at the moment, the water guide mechanism can not cut off water flow, so that the rotating speed of the unit is continuously increased, the quick door emergency closing operation is needed at the moment, the water flow is cut off, and the unit is stopped. In recent years, accidents of flooding of a factory building of a small hydropower station occur, and serious economic losses are caused. For a huge hydropower station rapid gate, the design of a rapid closing channel with high reliability and high stability is very important for the safe and stable operation of a unit. The quick closing channel of part of small hydropower stations is too single, once the channel is interrupted due to the damage of an optical fiber or a communication module, the quick door can not realize remote order quick closing when an accident occurs, and the door can be manually dropped to the site only by operating maintenance personnel, so that serious consequences such as flooding of a factory building can be caused. Disclosure of Invention This section is intended to outline some aspects of embodiments of the application and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description of the application and in the title of the application, which may not be used to limit the scope of the application. The present invention has been developed in view of the above-described and/or existing problems with hydropower station rapid gate block closure channel designs. Therefore, the problem to be solved by the present invention is how to realize the reliability of the fast door remote control channel. In order to solve the technical problems, the invention provides the following technical scheme: In a first aspect, the embodiment of the invention provides a design method of a multi-redundancy quick closing channel of a quick door of a giant hydropower station, which comprises the steps of judging a quick door falling by a PLC program of a unit LCU, making an opening signal of the quick door by a computer monitoring system according to the PLC program of the unit LCU, protecting a door falling button action of a water machine of a unit LCU local cabinet according to the signal, protecting a water machine backup by a water machine, enabling a follow-up action to be consistent with the door falling button action of the unit LCU local cabinet, simulating a water flooding factory button action of a local cabinet of a screen LCU main factory, switching a liquid level of the water flooding factory, enabling the liquid level switch action to be consistent with the water flooding factory button action of the screen LCU main factory, and completing the quick door falling action of a central control room. The method for designing the multi-redundancy quick closing channel of the quick door of the giant hydropower station is characterized in that the judgment condition of the quick door falling comprises the quick door falling when the rotating speed of a unit is greater than 115% and a shear pin of the unit is sheared, the quick door falling when the rotating speed of the unit is greater than 115% and the machine of the unit is in overspeed action, the quick door falling when the opening of the quick door is lower than 90%, the quick door analog quantity channel is normal and the quick door gate slides down for 600mm and the quick door sliding and lifting fails, the quick door falling when the runout alarm is 1 and the runout alarm is 3, the quick door falling when the emergency shutdown process is started and the second step of the emergency shutdown process is overtime, and the quick door falling when the quick shutdown process is started and the first step of the quick shutdown is overtime or the shear pin is sheared. The invention relates to a design method of a quick door multi-redundancy quick-closing channel of a giant hydropower station, which adopts a preferable scheme that an opening signal of a quick door is made according to a PLC program of a unit LCU, wherein the two paths of opening signals comprise three paths of opening signals, the two paths of opening signals are sent into a remote I/O cabinet at a water inlet of the unit LCU through optical fiber