CN116733729A - Hydropower station generator auxiliary equipment high-pressure oil pump control method based on multiple working conditions - Google Patents

Hydropower station generator auxiliary equipment high-pressure oil pump control method based on multiple working conditions Download PDF

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Publication number
CN116733729A
CN116733729A CN202310617042.9A CN202310617042A CN116733729A CN 116733729 A CN116733729 A CN 116733729A CN 202310617042 A CN202310617042 A CN 202310617042A CN 116733729 A CN116733729 A CN 116733729A
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China
Prior art keywords
pressure oil
oil pump
control
unit
command
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CN202310617042.9A
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Chinese (zh)
Inventor
张官祥
陈海斌
李利华
程建
王代春
董钟明
王斌
曹仲
于天军
陈自然
杨欲景
唐国平
张东峰
罗崇洋
张其俊
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Yangtze Ecology And Environment Co ltd
China Yangtze Power Co Ltd
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Yangtze Ecology And Environment Co ltd
China Yangtze Power Co Ltd
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Priority to CN202310617042.9A priority Critical patent/CN116733729A/en
Publication of CN116733729A publication Critical patent/CN116733729A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/02—Stopping, starting, unloading or idling control
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/20—Hydro energy

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

The application discloses a hydropower station generator auxiliary equipment high-pressure oil pump control method based on multiple working conditions, which comprises the following steps: step S1: acquiring the current operation condition of the unit, and judging the control mode of the high-pressure oil system; step S2: after judging and determining the execution strategies of the high-pressure oil system under different working conditions of the unit, monitoring the execution flow of the strategy under the working conditions, and realizing the control of the high-pressure oil pump; step S3: according to different operation conditions of the unit, monitoring whether the rotation speed of the unit meets a preset rotation speed value when the high-pressure oil system is put back or put forth; step S4: outputting a control instruction of the high-pressure oil system under the current working condition according to the calculation result of the step S3; step S5: executing the start and stop of the main high-pressure oil pump under the current working condition according to the output control instruction of the step S4; according to the application, the high-pressure oil pump can be put into and withdrawn from the high-pressure oil system according to different operation conditions of the unit, the high-pressure oil pump throwing and withdrawing conditions can be more accurately judged, the functions of remote single control, combined control and automatic control of the high-pressure oil pump can be realized, and the high-pressure oil pump motor can be started in time.

Description

Hydropower station generator auxiliary equipment high-pressure oil pump control method based on multiple working conditions
Technical Field
The application relates to the technical field of electric automatic control of hydropower stations, in particular to a hydropower station generator auxiliary equipment high-pressure oil pump control method based on multiple working conditions.
Background
The high-pressure oil pump control system has the effects that high-pressure oil is injected between the thrust bearing and the mirror plate to form an oil film when the unit is started, stopped and turned, so that the thrust bearing of the unit is in a good lubrication state in the low-speed rotation process, abrasion is reduced, and the damage of the bearing bush is avoided. The high-pressure oil pump control system mainly comprises 2 oil pumps and a control loop of an auxiliary control cabinet of a generator, and is mainly used for receiving remote starting and stopping commands of a monitoring system and ensuring normal starting and stopping of a unit. However, because the control flow of the high-pressure oil is simple when the high-pressure oil pump is put into and out of the machine set under different working conditions, abnormal conditions such as control failure of the high-pressure oil pump often occur, and particularly, under different working conditions such as starting up and stopping of the machine set, the high-pressure oil pump is controlled to have the problems of unreasonable switching conditions, simple control method and the like, potential safety hazards such as abrasion of thrust tiles exist, and the stable operation of the machine set is seriously influenced.
Disclosure of Invention
The application aims to overcome the defects, and provides a control method for the high-pressure oil pump of the hydropower station generator auxiliary equipment based on multiple working conditions, which can input and withdraw the high-pressure oil system according to different operation working conditions of a unit, more accurately judge the switching conditions of the high-pressure oil pump, and can realize the functions of remote single control, combined control and automatic control of the high-pressure oil pump and timely start the high-pressure oil pump motor.
The application aims to solve the technical problems, and adopts the technical scheme that: a hydropower station generator auxiliary equipment high-pressure oil pump control method based on multiple working conditions comprises the following steps:
step S1: acquiring the current operation condition of the unit, and judging the control mode of the high-pressure oil system;
step S2: after judging and determining the execution strategies of the high-pressure oil system under different working conditions of the unit, monitoring the execution flow of the strategy under the working conditions, and realizing the control of the high-pressure oil pump;
step S3: according to different operation conditions of the unit, monitoring whether the rotation speed of the unit meets a preset rotation speed value when the high-pressure oil system is put back or put forth; scanning and collecting the rotating speed of the unit under different operation conditions, and obtaining the real-time rotating speed N in the execution flow i I is the number of scanning cycles in different stages, and the initial value is 1; if N i Meet the preset rotation speed value under different working conditions, then executeStep S4; otherwise, i=i+1, returning to the step S2;
step S4: outputting a control instruction of the high-pressure oil system under the current working condition according to the calculation result of the step S3;
step S5: and (3) executing the start and stop of the main high-pressure oil pump under the current working condition according to the output control instruction of the step S4.
Preferably, in the step S1, the control mode of the high-pressure oil system is automatic, manual, and cutting off; when the high-pressure oil system is in an automatic position, a remote start-stop control instruction of the monitoring system can be received; when the high-pressure oil system is in a manual position, the conventional loop control instruction of the auxiliary control cabinet of the local generator can be received only; when the high-pressure oil system is in the cutting position, the remote control instruction of the monitoring system and the conventional loop control instruction of the auxiliary control cabinet of the local generator can not be received, and the cutting mode of the system is maintained.
Preferably, in the step S2, different unit working conditions are as follows:
when the unit is in a working condition of a shutdown standby state, the control of the high-pressure oil pump is realized through four modes, namely an on-site single-step operation mode, a monitoring system single control mode, a monitoring system combined control mode and a monitoring system automatic control mode;
when the unit is in a grid-connected state working condition, the control of the high-pressure oil pump is realized through a monitoring system single control mode, a monitoring system combined control mode and a monitoring system automatic control mode.
More preferably, when the high-pressure oil pump is in a single-step operation mode in the field, the start-stop control function of the high-pressure oil pump is realized through a conventional hard loop of the auxiliary control cabinet of the generator;
when the high-pressure oil pump is in a single control mode of the monitoring system, a single pump independent high-pressure oil pump operation instruction is issued to the high-pressure oil pump through a monitoring system operator station, so that the start-stop control function of the high-pressure oil pump is realized;
when the high-pressure oil pump is in a monitoring system joint control mode, an operator station of the monitoring system is used for issuing an operation instruction of the high-pressure oil system, and then a power generator auxiliary control cabinet PLC is used for judging a main mode and a standby mode of the high-pressure oil pump, so that a main high-pressure oil pump control instruction is output;
when the high-pressure oil pump is in the automatic control mode of the monitoring system, the monitoring system executes the high-pressure oil pump switching process according to the starting process and the stopping process of the unit.
Preferably, in the step S3: when the unit executes the high-pressure oil feeding system flow after the start-up flow is started under the working condition of the shutdown standby state, the rotating speed N of the unit is judged i Whether the preset value N of the high-pressure oil throwing rotating speed of starting is met ktr Judging the rotating speed N of the unit when the high-pressure oil returning system process is executed after the starting process is started i Whether the preset value N of the rotational speed of the high-pressure oil is met after the start-up ktc Conditions;
when the unit executes the high-pressure oil feeding system flow after the shutdown flow is started under the grid-connected working condition, the rotating speed N of the unit is judged i Whether the preset value N of the rotational speed of the high-pressure oil fed during shutdown is met ttr Judging the rotating speed N of the unit when the high-pressure oil returning system process is executed after the shutdown process is started under the condition i Whether the rotational speed of the shutdown high-pressure oil is satisfied with the preset value N ttc Conditions.
More preferably, the rotating speed of the unit meets N when the unit is in a stop standby state working condition i And (5) feeding the high-pressure oil system under peristaltic rotating speed action conditions.
Preferably, in the step S4: the control command of the high-pressure oil system comprises four commands, namely a command for starting the high-pressure oil system remotely and stopping the high-pressure oil system manually, a command for starting the high-pressure oil system remotely and stopping the high-pressure oil system automatically;
a command for starting the high-pressure oil system remotely and automatically are adopted or related to form a command for starting the high-pressure oil pump system; the command of stopping the high-pressure oil system remotely and the command of stopping the high-pressure oil system automatically are adopted or related to form a command of stopping the high-pressure oil pump system; and finally, issuing a command for starting the high-pressure oil pump system and a command for automatically stopping the high-pressure oil pump system to step S5.
Preferably, in the step S5: under the current working condition, if a command for starting the high-pressure oil pump system is received, the main use states of the No. 1 and No. 2 high-pressure oil pumps are firstly judged, the principle of who is used for starting is adopted, whether the high-pressure oil pump has a fault or not is further judged, if the high-pressure oil pump has no fault, a remote automatic starting command for the main high-pressure oil pump is issued, and the corresponding high-pressure oil pump motor is started;
under the current working condition, if a command for stopping the high-pressure oil pump system is received, firstly judging the running states of the No. 1 and No. 2 high-pressure oil pumps, and issuing a remote automatic high-pressure oil pump stopping command corresponding to the pumps by adopting a principle of who operates and stopping, and executing the high-pressure oil pump stopping motor by the corresponding pumps; and if the two pumps are simultaneously operated, simultaneously issuing a command for automatically stopping the high-pressure oil pump in a remote place of the two pumps, and executing a motor for stopping the corresponding high-pressure oil pump.
The application has the beneficial effects that:
compared with the prior art, the application has the beneficial effects that:
1. according to the application, the high-pressure oil pump can be put into and withdrawn from the high-pressure oil system according to different operation conditions of the unit, the high-pressure oil pump can be judged more accurately, and the monitoring system can realize the functions of remote single control, combined control and automatic control of the high-pressure oil pump, so that the high-pressure oil pump motor can be started in time.
2. According to the application, the high-pressure oil system and the high-pressure oil pump can be flexibly controlled according to the actual operation condition of the unit, and when the unit is started or stopped at a low rotating speed, the high-pressure oil pump is preferably put into; when the machine set is started or stopped at a high rotating speed, the high-pressure oil pump is withdrawn in time; when the machine set is in a stop standby state, the high-pressure oil pump is unconditionally and remotely put into the machine set when the rotating speed of the machine set reaches the peristaltic action rotating speed, and an oil film is built between the thrust tile and the mirror plate in time, so that the burning loss of the thrust tile is protected.
3. The method can effectively judge and identify the high-pressure oil pump switching strategy, optimize the high-pressure oil pump start-stop control mode, improve the application range and conditions of the high-pressure oil pump, be more suitable for the requirements of the field unit on establishing oil films by high-pressure oil under different working conditions, and improve the reliability and safety of equipment.
4. The method can effectively and accurately identify the preset rotating speed value of the unit under different working conditions, greatly improve the accuracy of the high-pressure oil pump on-off, more scientifically and intuitively reflect the corresponding relation between the high-pressure oil pump and the working conditions of the unit, provide technical guarantee for the on-off success rate of the unit of the hydropower station, and further ensure the safe and stable operation of the hydropower station.
Drawings
FIG. 1 is a graph of trend analysis of a monitoring system under a standby state of shutdown;
FIG. 2 is a graph II of trend analysis of the monitoring system under the working condition of standby state of shutdown;
FIG. 3 is a graph of trend analysis of the monitoring system under grid-connected conditions.
Detailed Description
The present application will be described in further detail with reference to specific examples.
Example 1:
the application provides a hydropower station generator auxiliary equipment high-pressure oil pump control system based on multiple working conditions, which comprises an acquisition module, an information processing module, a control instruction output module and an execution unit, wherein the acquisition module is used for acquiring control instructions of a hydropower station generator; wherein, the liquid crystal display device comprises a liquid crystal display device,
the acquisition module is used for acquiring the current unit operation condition, the control mode of the high-pressure oil pump, the control mode of the high-pressure oil system and the real-time rotating speed when the process is executed under the current condition.
The information processing module is used for processing strategy processing of high-pressure oil pump input and exit under different working conditions and judging real-time rotating speed N under different working conditions i And the corresponding relation with a preset rotating speed value.
The control instruction output module is used for selecting the operation mode of the high-pressure oil pump according to the real-time rotating speed and the strategy judgment result obtained by the information processing module and outputting the result so as to control the high-pressure oil pump.
The execution unit is used for executing the result of the control instruction output module and directly acts on the corresponding main high-pressure oil pump.
Example 2:
the application provides a hydropower station generator auxiliary equipment high-pressure oil pump control method based on multiple working conditions, which comprises the following steps:
step S1: acquiring the current operation condition of the unit, and judging the control mode of the high-pressure oil system;
step S2: after judging and determining the execution strategies of the high-pressure oil system under different working conditions of the unit, monitoring the execution flow of the strategy under the working conditions, and realizing the control of the high-pressure oil pump;
step S3: according to different operation conditions of the unit, monitoring whether the rotation speed of the unit meets a preset rotation speed value when the high-pressure oil system is put back or put forth; scanning and collecting the rotating speed of the unit under different operation conditions, and obtaining the real-time rotating speed N in the execution flow i I is the number of scanning cycles in different stages, and the initial value is 1; if N i Step S4 is executed if the preset rotating speed value under different working conditions is met; otherwise, i=i+1, returning to the step S2;
step S4: outputting a control instruction of the high-pressure oil system under the current working condition according to the calculation result of the step S3;
step S5: and (3) executing the start and stop of the main high-pressure oil pump under the current working condition according to the output control instruction of the step S4.
Example 3:
the application provides a hydropower station generator auxiliary equipment high-pressure oil pump on-site single-step control method under the working condition of a machine set in a stop standby state, which comprises the following steps:
step S1: the current operation condition of the unit is a standby state of shutdown, the high-pressure oil system is judged and determined to have no remote operation condition, and the control mode is a local single-step operation mode.
Step S2: and judging and determining that the high-pressure oil system in the auxiliary control cabinet of the generator is in a local mode. The high-pressure oil pump in the field cabinet body adopts a conventional hard loop control mode, and the control loops of the two pumps are consistent, so that the independent and manual control functions can be realized. Only one pump control method is described here, and a No. 1 high-pressure oil pump is taken as an example.
Step S3: judging whether the No. 1 high-pressure oil pump has a fault or not, and judging whether a control handle is in a manual mode or not. The following operations are performed when both of the above conditions are normal.
Step S4: and judging whether a stop button of the No. 1 high-pressure oil pump acts. If the stop command signal is sent, the high-pressure oil pump No. 1 is manually stopped, and the high-pressure oil pump No. 1 is stopped. If no stop command signal is present, step S5 is performed.
Step S5: and judging whether a starting button of the No. 1 high-pressure oil pump acts. If the starting command signal is available, outputting a command for starting the high-pressure oil pump No. 1 locally and manually, and executing the starting of the high-pressure oil pump No. 1.
Step S6: the in-situ single-step control method of the No. 2 high-pressure oil pump is the same as that of the steps S3 to S5.
Example 4:
the application provides a control method of a high-pressure oil pump of hydropower station generator auxiliary equipment in a single control mode of a monitoring system under multiple working conditions, which comprises the following steps:
step S1: and acquiring the current operation condition of the unit, and judging whether the high-pressure oil system has remote operation conditions. The high-pressure oil system can operate in a single control mode of the monitoring system under the working conditions of machine unit shutdown standby state, machine unit grid connection state and the like, and is generally operated manually by an operator.
Step S2: it is determined whether the operator station allows the operation. An operator can typically operate the high pressure oil system in a single control mode of the monitoring system during unit commissioning or emergency situations. The operator operation needs to log in the monitoring system operation account and password to operate the equipment on the monitoring system page.
Step S3: is it determined that the high pressure oil system is in a remote mode? The control mode of the high-pressure oil system is arranged on the auxiliary control cabinet of the generator and is mainly divided into two modes of local and remote. And (4) opening a generator page in a monitoring system picture by an operator to check the control mode of the high-pressure oil system as a remote mode, otherwise, checking local equipment by the operator, switching the control mode of the high-pressure oil system to the remote mode, and executing the step S4 after confirmation.
Step S4: the operator judges whether the high-pressure oil system in the monitoring system is in a single control mode, and executes step S5 after confirming that the high-pressure oil system is in the single control mode.
The control mode of the high-pressure oil pump is divided into a single control mode and a combined control mode, wherein in the single control mode, the remote part of the monitoring system can independently operate corresponding No. 1 and No. 2 high-pressure oil pumps, and commands of the high-pressure oil pumps are directly issued to a conventional hard loop of the auxiliary control cabinet of the generator; in the combined control mode, the monitoring system can send out a command for starting and stopping the high-pressure oil system to the PLC of the auxiliary control cabinet of the generator, and the PLC automatically judges the main pump and the standby pump to start and stop control.
Step S5: in the single control mode, an operator selects the high-pressure oil pump to be operated on a screen of the monitoring system, and performs self-checking on the condition of allowing the remote operation of the No. 1 high-pressure oil pump. The self-checking condition is satisfied and step S6 may be performed. In the single control mode, the operation instruction is directly sent to the conventional hard loop control of the auxiliary control device of the generator through the control device of the monitoring system, and the control loops of the two pumps are consistent, so that an independent control function can be realized. Only one pump control method is described here, and a No. 1 high-pressure oil pump is taken as an example.
The self-checking project mainly comprises signals of LCU automatic mode conditions, normal DC24V power supply of the auxiliary control cabinet of the generator, automatic control of the No. 1 high-top oil pump, thermal overload of the No. 1 high-pressure oil pump and the like.
Step S6: the operator checks information on whether the No. 1 high-pressure oil pump is in an automatic mode, whether there is a fault, or the like. And (3) an operator opens the information of the automatic mode, the fault state and the like of the No. 1 high-pressure oil pump in the power generator picture of the monitoring system, if the state information is normal, the step S7 is executed, otherwise, the operator performs on-site inspection to ensure that the oil pump is in the automatic mode and has no fault information.
Step S7: the operator checks whether the No. 1 high-pressure oil pump has a stop command. If the command is a stop command, outputting a command for stopping the high-pressure oil pump No. 1 manually in a remote place, and executing the stop of the high-pressure oil pump No. 1.
Step S8: and the operation issues a No. 1 high-pressure oil pump operation instruction. The operator operates and issues a start instruction or a stop instruction of the No. 1 high-pressure oil pump in a monitoring system picture according to the requirement. If the operator issues a high-pressure oil pump stop instruction No. 1, executing a step S7; and outputting a remote manual starting instruction of the No. 1 high-pressure oil pump when the operator issues the starting instruction of the No. 1 high-pressure oil pump, and executing the starting of the No. 1 high-pressure oil pump.
Example 5:
the application provides a control method of a high-pressure oil pump of hydropower station generator auxiliary equipment in a combined control mode of a monitoring system of a unit under multiple working conditions, which comprises the following steps:
steps S1 to S3: the steps of the control method for the high-pressure oil pump of the hydropower station generator auxiliary equipment in the combined control mode are similar to those of the steps S1 to S3 in the single control mode.
Step S4: and the operator judges whether the high-pressure oil system in the monitoring system is in the combined control mode, and executes the step S5 after confirming that the high-pressure oil system is in the combined single control mode.
Step S5: the operator checks in the monitoring system screen whether there is a command to stop the high-pressure oil system. And outputting a control instruction of the high-pressure oil system under the current working condition according to the calculation result.
The command of stopping the high-pressure oil system remotely and the command of stopping the high-pressure oil system automatically are adopted or related to form a command of stopping the high-pressure oil pump system. Under the current working condition, if a command for stopping the high-pressure oil pump system is received, firstly judging the running states of the No. 1 and No. 2 high-pressure oil pumps, and issuing a remote automatic high-pressure oil pump stopping command corresponding to the pumps by adopting a principle of who operates and stopping, and executing the high-pressure oil pump stopping motor by the corresponding pumps; and if the two pumps are simultaneously operated, simultaneously issuing a command for automatically stopping the high-pressure oil pump in a remote place of the two pumps, and executing a motor for stopping the corresponding high-pressure oil pump.
Step S6: and an operator operates and issues a high-pressure oil system starting instruction or a stopping instruction in a monitoring system picture according to the requirement, and starts and stops the main high-pressure oil pump under the current working condition.
When a command for stopping the high-pressure oil system is issued in the monitoring system picture, executing a step S5;
when a command for starting the high-pressure oil system is issued in a monitoring system picture, the command for starting the high-pressure oil system manually in a remote way is adopted or related to the command for starting the high-pressure oil system automatically in a remote way, so that a command for starting the high-pressure oil pump system is formed; under the current working condition, if a command for starting the high-pressure oil pump system is received, the main use states of the No. 1 and No. 2 high-pressure oil pumps are firstly judged, the principle of who is used for starting is adopted, whether the corresponding main use high-pressure oil pump has a fault or not is further judged, if the corresponding main use high-pressure oil pump has no fault, a remote automatic starting command for the main use high-pressure oil pump is issued, and the corresponding high-pressure oil pump motor is started.
Taking the machine set operation working condition as the shutdown standby state working condition or the grid-connected state working condition as an example, the high-pressure oil pump is in a monitoring system joint control mode, and analyzing the monitoring system trend of the machine set under the shutdown standby state working condition or the grid-connected state working condition, wherein fig. 1 and 2 are monitoring system trend analysis diagrams under the shutdown standby state working condition, and fig. 3 is a monitoring system trend analysis diagram under the grid-connected state working condition.
As can be seen from the figure, when the unit operation condition is a shutdown condition or a grid-connected condition, the high-pressure oil pump No. 1 and the high-pressure oil pump No. 2 are both in an automatic mode. When the starting-up flow of the unit executes the step of inputting the high-pressure oil pump, the monitoring system issues a command of 'the starting-up flow is automatically input into the high-pressure oil system', and the state of the command is 1; after the time delay is 5 seconds, the pressure SP03 and the pressure SP04 of the outlet manifold of the high-pressure oil system reach a set value, namely the pressure SP03 and the pressure SP04 of the outlet manifold of the high-pressure oil system act, and the state of the pressure SP03 and the pressure SP04 of the outlet manifold of the high-pressure oil system is changed into 1; and (5) meeting the condition of successful pressure build-up of the high-pressure oil, namely judging that the pressure build-up of the high-pressure oil is successful. And when the rotating speed of the unit reaches a set rotating speed value, executing exiting the high-pressure oil system in the starting process. According to the application, the high-pressure oil system can be put into the high-pressure oil pump according to different operation conditions of the unit, the input condition of the high-pressure oil pump can be more accurately judged, the monitoring system can realize the function of remotely controlling the high-pressure oil pump in a combined way, and the motor of the high-pressure oil pump can be started in time. When the machine set is started at a high rotating speed, the high-pressure oil pump is timely withdrawn; the method can effectively and accurately identify the preset rotating speed value of the unit under different working conditions, greatly improve the accuracy of the high-pressure oil pump on-off, more scientifically and intuitively reflect the corresponding relation between the high-pressure oil pump and the working conditions of the unit, provide technical guarantee for the on-off success rate of the unit of the hydropower station, and further ensure the safe and stable operation of the hydropower station.
The above embodiments are merely preferred embodiments of the present application, and should not be construed as limiting the present application, and the embodiments and features of the embodiments of the present application may be arbitrarily combined with each other without collision. The protection scope of the present application is defined by the claims, and the protection scope includes equivalent alternatives to the technical features of the claims. I.e., equivalent replacement modifications within the scope of this application are also within the scope of the application.

Claims (8)

1. A hydropower station generator auxiliary equipment high-pressure oil pump control method based on multiple working conditions is characterized by comprising the following steps of: it comprises the following steps:
step S1: acquiring the current operation condition of the unit, and judging the control mode of the high-pressure oil system;
step S2: after judging and determining the execution strategies of the high-pressure oil system under different working conditions of the unit, monitoring the execution flow of the strategy under the working conditions, and realizing the control of the high-pressure oil pump;
step S3: according to different operation conditions of the unit, monitoring whether the rotation speed of the unit meets a preset rotation speed value when the high-pressure oil system is put back or put forth; scanning and collecting the rotating speed of the unit under different operation conditions, and obtaining the real-time rotating speed N in the execution flow i I is the number of scanning cycles in different stages, and the initial value is 1; if N i Step S4 is executed if the preset rotating speed value under different working conditions is met; otherwise, i=i+1, returning to the step S2;
step S4: outputting a control instruction of the high-pressure oil system under the current working condition according to the calculation result of the step S3;
step S5: and (3) executing the start and stop of the main high-pressure oil pump under the current working condition according to the output control instruction of the step S4.
2. The hydropower station generator auxiliary equipment high-pressure oil pump control method based on the multiple working conditions according to claim 1, wherein the method comprises the following steps of:
in the step S1, the control mode of the high-pressure oil system is automatic, manual and cutting off; when the high-pressure oil system is in an automatic position, a remote start-stop control instruction of the monitoring system can be received; when the high-pressure oil system is in a manual position, the conventional loop control instruction of the auxiliary control cabinet of the local generator can be received only; when the high-pressure oil system is in the cutting position, the remote control instruction of the monitoring system and the conventional loop control instruction of the auxiliary control cabinet of the local generator can not be received, and the cutting mode of the system is maintained.
3. The hydropower station generator auxiliary equipment high-pressure oil pump control method based on the multiple working conditions according to claim 1, wherein the method comprises the following steps of: in the step S2, different unit working conditions are as follows:
when the unit is in a working condition of a shutdown standby state, the control of the high-pressure oil pump is realized through four modes, namely an on-site single-step operation mode, a monitoring system single control mode, a monitoring system combined control mode and a monitoring system automatic control mode;
when the unit is in a grid-connected state working condition, the control of the high-pressure oil pump is realized through a monitoring system single control mode, a monitoring system combined control mode and a monitoring system automatic control mode.
4. The hydropower station generator auxiliary equipment high-pressure oil pump control method based on the multiple working conditions according to claim 3, wherein the method comprises the following steps of:
when the high-pressure oil pump is in a single-step operation mode in the field, the start-stop control function of the high-pressure oil pump is realized through a conventional hard loop of the auxiliary control cabinet of the generator;
when the high-pressure oil pump is in a single control mode of the monitoring system, a single pump independent high-pressure oil pump operation instruction is issued to the high-pressure oil pump through a monitoring system operator station, so that the start-stop control function of the high-pressure oil pump is realized;
when the high-pressure oil pump is in a monitoring system joint control mode, an operator station of the monitoring system is used for issuing an operation instruction of the high-pressure oil system, and then a power generator auxiliary control cabinet PLC is used for judging a main mode and a standby mode of the high-pressure oil pump, so that a main high-pressure oil pump control instruction is output;
when the high-pressure oil pump is in the automatic control mode of the monitoring system, the monitoring system executes the high-pressure oil pump switching process according to the starting process and the stopping process of the unit.
5. The hydropower station generator auxiliary equipment high-pressure oil pump control method based on the multiple working conditions according to claim 1, wherein the method comprises the following steps of: in the step S3:
when the unit executes the high-pressure oil feeding system flow after the start-up flow is started under the working condition of the shutdown standby state, the rotating speed N of the unit is judged i Whether the preset value N of the high-pressure oil throwing rotating speed of starting is met ktr Judging the rotating speed N of the unit when the high-pressure oil returning system process is executed after the starting process is started i Whether the preset value N of the rotational speed of the high-pressure oil is met after the start-up ktc Conditions;
when the unit executes the high-pressure oil feeding system flow after the shutdown flow is started under the grid-connected working condition, the rotating speed N of the unit is judged i Whether the preset value N of the rotational speed of the high-pressure oil fed during shutdown is met ttr Judging the rotating speed N of the unit when the high-pressure oil returning system process is executed after the shutdown process is started under the condition i Whether the rotational speed of the shutdown high-pressure oil is satisfied with the preset value N ttc Conditions.
6. The hydropower station generator auxiliary equipment high-pressure oil pump control method based on the multiple working conditions according to claim 5, wherein the method comprises the following steps of: when the machine set is in a stop standby state working condition, the rotating speed of the machine set meets N i And (5) feeding the high-pressure oil system under peristaltic rotating speed action conditions.
7. The hydropower station generator auxiliary equipment high-pressure oil pump control method based on the multiple working conditions according to claim 1, wherein the method comprises the following steps of: in the step S4:
the control command of the high-pressure oil system comprises four commands, namely a command for starting the high-pressure oil system remotely and stopping the high-pressure oil system manually, a command for starting the high-pressure oil system remotely and stopping the high-pressure oil system automatically;
a command for starting the high-pressure oil system remotely and automatically are adopted or related to form a command for starting the high-pressure oil pump system; the command of stopping the high-pressure oil system remotely and the command of stopping the high-pressure oil system automatically are adopted or related to form a command of stopping the high-pressure oil pump system; and finally, issuing a command for starting the high-pressure oil pump system and a command for automatically stopping the high-pressure oil pump system to step S5.
8. The hydropower station generator auxiliary equipment high-pressure oil pump control method based on the multiple working conditions according to claim 1, wherein the method comprises the following steps of: in the step S5:
under the current working condition, if a command for starting the high-pressure oil pump system is received, the main use states of the No. 1 and No. 2 high-pressure oil pumps are firstly judged, the principle of who is used for starting is adopted, whether the high-pressure oil pump has a fault or not is further judged, if the high-pressure oil pump has no fault, a remote automatic starting command for the main high-pressure oil pump is issued, and the corresponding high-pressure oil pump motor is started;
under the current working condition, if a command for stopping the high-pressure oil pump system is received, firstly judging the running states of the No. 1 and No. 2 high-pressure oil pumps, and issuing a remote automatic high-pressure oil pump stopping command corresponding to the pumps by adopting a principle of who operates and stopping, and executing the high-pressure oil pump stopping motor by the corresponding pumps; and if the two pumps are simultaneously operated, simultaneously issuing a command for automatically stopping the high-pressure oil pump in a remote place of the two pumps, and executing a motor for stopping the corresponding high-pressure oil pump.
CN202310617042.9A 2023-05-29 2023-05-29 Hydropower station generator auxiliary equipment high-pressure oil pump control method based on multiple working conditions Pending CN116733729A (en)

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