Decoupling control method and device of tidal power plant unit drain gate and server

Abstract

The application provides a tidal power station unit drainage gate decoupling control method and device and a server, and relates to the technical field of tidal power station control. When the tidal level drops and is lower than the reference surface with a tidal level of 0, the highest tidal level of the current tide, the highest tidal level time and the lowest tidal level time are obtained. The highest tidal level is compared with a preset spring tide determination tidal level to determine the current tide mark. According to the highest tidal level of the current tide, the highest tidal level time, the lowest tidal level time and the current tide mark, a start-stop control process is executed, and according to the highest tidal level of the current tide, the highest tidal level time, the lowest tidal level time, the current tide mark, the rising tide 0 time and the tidal fall 0 time, a switch gate control process is executed to complete the decoupling control of start-stop and switch gate. The application can decouple the control process of the unit and the drainage gate, thereby significantly improving the robustness and process compatibility of the power station control.

Description

Technical Field

[0001] This invention relates to the technical field of tidal power plant control, and in particular to a decoupling control method, device and server for the spillway gate of a tidal power plant unit. Background Technology

[0002] Tidal power plants typically employ a single-reservoir bidirectional power generation mode. Within a tidal cycle, power generation operations in both the forward and reverse directions must be executed sequentially. Each direction involves two control stages: unit start-up and shutdown, and spillway gate opening and closing. Current technologies suggest that power plant operation relies heavily on the experience of operators to build an experience database. Automatic control of bidirectional power generation in a single reservoir is achieved through autonomous querying of this database. However, in existing control schemes, unit power generation control and spillway gate control are highly coupled. Existing automatic control logic executes the unit start-up / shutdown process and the spillway gate opening / closing process sequentially. If any stage cannot continue due to equipment failure or anomaly, the entire control process automatically stalls, rendering subsequent stages inoperable. This results in insufficient system robustness. Furthermore, existing control rules are built upon a fixed experience database, with the start-up / shutdown and spillway gate opening / closing conditions deeply bound to it. When an optimized scheduling algorithm is introduced, the optimization calculation results are difficult to directly adapt to the existing control process, leading to poor versatility. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a decoupled control method, device and server for the spillway gate of a tidal power station unit, which can decouple the control process of the unit and the spillway gate, thereby significantly improving the robustness and process compatibility of the power station control.

[0004] In a first aspect, embodiments of the present invention provide a decoupling control method for the spillway gate of a tidal power station unit. The method includes: when the tide level drops and is below a reference surface where the tide level is 0, acquiring the highest tide level, the time of the highest tide level, and the time of the lowest tide level; comparing the highest tide level with a preset spring tide determination tide level to determine the current tide indicator, wherein the current tide indicator includes: spring tide and neap tide; when the current tide indicator is spring tide, it is permissible to enter the forward and reverse automatic power generation start-up and start-up process and the forward and reverse automatic power generation gate opening and closing process; when the current tide indicator is neap tide, it is permissible to enter the forward automatic power generation start-up and start-up process and the unidirectional automatic power generation gate opening and closing process; executing the start-up and start-up control process according to the highest tide level, the time of the highest tide level, the time of the lowest tide level, the current tide indicator, the time of rising tide passing 0, and the time of falling tide passing 0, and executing the gate opening and closing control process to complete the decoupling control of start-up and start-up and gate opening and closing.

[0005] In one implementation, the steps of executing the start-up and shutdown control process based on the highest tide level, the highest tide time, the lowest tide time, and the current tide indicator include: if the current time is not greater than the lowest tide time, then executing the forward power generation automatic start-up process and the forward power generation automatic shutdown process based on the current reservoir water level and the current tide level; if the current time is greater than the lowest tide time but not greater than the highest tide time, then executing the reverse power generation automatic start-up process and the reverse power generation automatic shutdown process based on the current reservoir water level, the current tide level, and the current tide indicator; if the current time is greater than the highest tide time, then proceeding to the termination determination process.

[0006] In one implementation, the steps of executing the automatic start-up process and the automatic shutdown process of forward power generation include: when the current reservoir water level is greater than the preset lower limit of the reservoir water level and the current tide level is less than the preset forced start-up tide level of forward power generation, the automatic start-up process of forward power generation is executed; after the automatic start-up process of forward power generation is completed, if it is detected that the current reservoir water level is not greater than the preset lower limit of the reservoir water level, the automatic shutdown process of forward power generation is executed.

[0007] In one embodiment, the steps of executing the automatic reverse power generation start-up process and the automatic reverse power generation shutdown process include: when the current reservoir water level is lower than the preset upper limit of the reservoir water level and the current tide level is higher than the preset reverse power generation forced start-up tide level, the automatic reverse power generation start-up process is executed; after the automatic reverse power generation start-up process is completed, if it is detected that the current reservoir water level is not lower than the preset upper limit of the reservoir water level, the automatic reverse power generation shutdown process is executed.

[0008] In one implementation, the steps of executing the gate opening and closing control process based on the highest tide level, highest tide time, lowest tide time, current tide marker, rising tide zero-crossing time, and falling tide zero-crossing time of the current tide include: if the current time is greater than the lowest tide time and less than the rising tide zero-crossing time of the current tide, then execute the forward power generation automatic gate opening process, the forward power generation automatic gate closing process, the unidirectional power generation automatic gate opening process, and the unidirectional power generation automatic gate closing process; if the current time is greater than half the sum of the rising tide zero-crossing time and the highest tide time, and less than the falling tide zero-crossing time of the current tide, then execute the reverse power generation automatic gate opening process and the reverse power generation automatic gate closing process; if the current time is in other time periods, then proceed to the termination determination process.

[0009] In one embodiment, the steps of executing the forward power generation automatic gate opening process, the forward power generation automatic gate closing process, the unidirectional power generation automatic gate opening process, and the unidirectional power generation automatic gate closing process include: when the current tide marker is spring tide, if the current reservoir water level is greater than the preset lower limit of the reservoir water level and a forced gate opening order is received after the forward power generation shutdown, then the forward power generation automatic gate opening process is executed; after the forward power generation automatic gate opening process is completed, if the current time is greater than the lowest tide time and less than half of the sum of the rising tide zero time and the highest tide time, or the current reservoir water level is not greater than the preset lower limit of the reservoir water level, then the forward power generation automatic gate closing process is executed; when the current tide marker is neap tide, if the current reservoir water level is greater than the preset lower limit of the reservoir water level and a forced gate opening order is received after the forward power generation shutdown, then the unidirectional power generation automatic gate opening process is executed; after the unidirectional power generation automatic gate opening process is completed, if the current time is greater than the highest tide time and less than the ebb tide zero time, or the current reservoir water level is not less than the preset upper limit of the reservoir water level, then the unidirectional power generation automatic gate closing process is executed.

[0010] In one embodiment, the steps of executing the automatic gate opening procedure and the automatic gate closing procedure for reverse power generation include: when the current reservoir water level is lower than the preset upper limit of the reservoir water level and a forced gate opening order is received after the reverse power generation is shut down, the automatic gate opening procedure for reverse power generation is executed; after the automatic gate opening procedure for reverse power generation is completed, if the current time is greater than the highest tide time and less than the time when the tide has passed 0, and the current reservoir water level is not less than the preset upper limit of the reservoir water level, then the automatic gate closing procedure for reverse power generation is executed.

[0011] Secondly, embodiments of the present invention also provide a decoupling control device for the spillway gate of a tidal power station unit. The device includes: an information acquisition module, which acquires the highest tide level, the highest tide level time, and the lowest tide level time when the tide level drops and is below the reference surface where the tide level is 0; a tide level judgment module, which compares the highest tide level with a preset spring tide judgment tide level to determine the current tide indicator, wherein the current tide indicator includes: spring tide and neap tide. When the current tide indicator is spring tide, it is permissible to enter the forward and reverse automatic power generation start-up process and the forward and reverse automatic power generation gate opening and closing process. When the current tide indicator is neap tide, it is permissible to enter the forward automatic power generation start-up process and the unidirectional automatic power generation gate opening and closing process; and a decoupling control module, which executes the start-up control process based on the highest tide level, the highest tide level time, the lowest tide level time, and the current tide indicator, and executes the gate opening and closing control process based on the highest tide level, the highest tide level time, the lowest tide level time, the current tide indicator, the time when the tide rises above 0, and the time when the tide falls below 0, so as to complete the decoupling control of start-up and gate opening and closing.

[0012] Thirdly, embodiments of the present invention also provide a server, including a processor and a memory, the memory storing computer-executable instructions executable by the processor, the processor executing the computer-executable instructions to implement any of the methods provided in the first aspect.

[0013] Fourthly, embodiments of the present invention also provide a computer-readable storage medium storing computer-executable instructions, which, when invoked and executed by a processor, cause the processor to implement any of the methods provided in the first aspect.

[0014] The embodiments of the present invention bring the following beneficial effects: This invention provides a decoupled control method, device, and server for the spillway gate of a tidal power station unit. When the tide level drops below a reference level of 0, the method acquires the highest tide level, the highest tide time, and the lowest tide time, compares the highest tide level with a preset spring tide determination level, and then determines the current tide marker. Based on the highest tide level, the highest tide time, the lowest tide time, and the current tide marker, the method executes a start-up / start-up control process. Furthermore, based on the highest tide level, the highest tide time, the lowest tide time, the current tide marker, the time of rising tide passing 0, and the time of falling tide passing 0, the method executes a gate opening / closing control process. This decoupled control of start-up / start-up and gate opening / closing significantly improves the robustness and process compatibility of the power station control.

[0015] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained in accordance with the structures particularly pointed out in the description, claims and drawings.

[0016] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 A flowchart illustrating a decoupling control method for a tidal power station unit spillway gate provided in an embodiment of the present invention; Figure 2 A flowchart illustrating a start-up and shutdown control method provided in an embodiment of the present invention; Figure 3 A schematic flowchart of a gate switching control method provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the decoupling control device for the spillway gate of a tidal power station unit provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of a server provided in an embodiment of the present invention. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Existing tidal power stations adopt a single-reservoir bidirectional power generation mode. The control process involves forward power generation start-up and shutdown, forward power generation start-up and gate opening and closing, reverse power generation start-up and shutdown, and reverse power generation start-up and gate opening and closing. The unit operating conditions involve at least four types: forward power generation, reverse power generation, forward shutdown, and reverse shutdown. The control rules are very complex. Currently, the operation of the power station relies on the operating experience of the operators. An experience database can be built based on the operating experience. Automatic control of single-reservoir bidirectional power generation can be achieved through autonomous querying of the experience database, thereby improving the operating efficiency while ensuring the stable and reliable operation of the tidal power station.

[0021] However, current experience-based automatic control systems do not fully decouple the generator power generation process from the spillway gate opening and closing process. This means that when the generator fails to start or stop normally due to a sudden malfunction, the process automatically stalls, preventing the spillway gate from opening and closing properly, thus rendering the entire control logic ineffective. To improve the robustness of tidal power station control, it is necessary to decouple the generator power generation process control from the spillway gate opening and closing process control to avoid a situation where a deterioration or failure in one process leads to the inability to automatically control the other.

[0022] Furthermore, with the widespread application of optimized scheduling technology in power plant operation control, it is necessary to construct a standardized process for automatic control of single-reservoir bidirectional power generation in tidal power plants. This process should be adapted to both the experience base and the optimized scheduling calculation results, thereby enabling rapid querying and automatic control of start-up and shutdown conditions and gate opening and closing conditions. Based on this, the decoupling control method, device, and server for the tidal power plant unit spillway gate provided by this invention can decouple the control processes of the unit and the spillway gate, thereby significantly improving the robustness and process compatibility of power plant control.

[0023] See Figure 1 The diagram shows a decoupling control method for the spillway gate of a tidal power station unit. The method mainly includes the following steps S102 to S106: Step S102: When the tide level drops and falls below the reference level where the tide level is 0, obtain the highest tide level, the time of the highest tide level, and the time of the lowest tide level.

[0024] In one implementation, when the tide level drops and falls below the zero datum, it signifies the end of the previous tidal cycle and the start of the current tidal cycle. The zero datum serves as the reference point for tide height, and all tide level data is measured relative to this datum. At this time, the system reads the forecast data corresponding to the current tidal cycle from a pre-stored forecast tide data table. Specifically, this includes the forecast of the current highest tide level, the forecast of the current lowest tide level, and the forecast of the current highest tide level. The forecast of the current tide refers to the forecast tide level curve from the moment the previous tide level dropped and crossed zero to the moment the next tide level dropped and crossed zero. This curve covers the tide level changes throughout the current tidal cycle. The highest tide level is the maximum tide value on this forecast curve, and the lowest and highest tide levels are the times corresponding to the minimum and maximum tide values ​​on the curve, respectively. By acquiring this data, a data foundation is provided for subsequently determining the current tide indicator (spring tide or neap tide) and identifying the current time period.

[0025] Step S104: Compare the highest tide level with the preset spring tide determination tide level to determine the current tide indicator. The current tide indicator includes spring tide and neap tide. When the current tide indicator is spring tide, it is allowed to enter the forward and reverse automatic power generation start-up and start-up process and the forward and reverse automatic power generation gate opening and closing process. When the current tide indicator is neap tide, it is allowed to enter the forward automatic power generation start-up and start-up process and the unidirectional automatic power generation gate opening and closing process.

[0026] In one implementation, the start-up and shutdown control process and the gate opening and closing control process can be decoupled after the current tide indicator is determined, or the information such as the highest tide level, the highest tide level time, and the lowest tide level time of the current tide can be obtained independently, and the current tide indicator can be determined separately before subsequent independent control is performed.

[0027] Step S106: Based on the highest tide level, highest tide time, lowest tide time, and current tide indicator, execute the power-on / off control process, and based on the highest tide level, highest tide time, lowest tide time, current tide indicator, tide passing zero, and tide passing zero, execute the gate opening / closing control process to complete the decoupling control of power-on / off and gate opening / closing.

[0028] In one implementation, after acquiring the highest tide level, highest tide time, and lowest tide time of the current tide, and comparing the highest tide level with a preset spring tide determination tide level to determine the current tide marker, the system executes the start-up / shutdown control process and the gate opening / closing control process, respectively. The start-up / shutdown control process, based on the highest tide level, highest tide time, lowest tide time, and current tide marker, sequentially determines the current time period, the relationship between the current reservoir water level and the upper and lower limits of the reservoir water level, the relationship between the current tide level and the mandatory start-up tide level, and whether the start-up / shutdown conditions are met, thereby deciding whether to execute the automatic start-up or shutdown operation of the unit. The gate opening / closing control process, based on the highest tide level, highest tide time, lowest tide time, current tide marker, the time of the rising tide crossing zero, and the time of the falling tide crossing zero, sequentially determines the current time period, whether the current tide marker is a spring tide or a neap tide, the relationship between the current reservoir water level and the upper and lower limits of the reservoir water level, whether a mandatory gate opening order has been received, and whether the gate opening / closing conditions are met, thereby deciding whether to execute the automatic opening or closing operation of the spillway gate. The two processes described above independently acquire the required data and make judgments, without any calling or waiting relationship between them, thus achieving decoupling between the unit's power generation process control and the spillway gate opening and closing process control. When one process cannot be executed normally due to equipment failure, the other process can still run independently according to its own judgment logic, preventing the entire control system from being stuck due to the failure of a single process.

[0029] The decoupling control method for the spillway gate of the tidal power station provided in this embodiment of the invention can decouple the control processes of the unit and the spillway gate, thereby significantly improving the robustness and process compatibility of the power station control.

[0030] See Figure 2 The flowchart shown is a schematic diagram of a start-up and shutdown control method. This embodiment of the invention also provides an implementation method for start-up and shutdown control, which determines whether to implement an automatic start-up or automatic shutdown process for the unit based on the current time period, the current tide indicator, the upper limit and lower limit of the reservoir water level, the forced start-up tide level for forward power generation and the forced start-up tide level for reverse power generation, and the start-up and shutdown conditions.

[0031] In one implementation, if the current time is not greater than the lowest tide time, then based on the current reservoir water level and the current tide level, the automatic start-up process and the automatic shutdown process of forward power generation are executed: when the current reservoir water level is greater than the preset lower limit of reservoir water level and the current tide level is less than the preset forced start tide level of forward power generation, the automatic start-up process of forward power generation is executed; after the automatic start-up process of forward power generation is completed, if it is detected that the current reservoir water level is not greater than the preset lower limit of reservoir water level, then the automatic shutdown process of forward power generation is executed.

[0032] If the current time is greater than the lowest tide time but not greater than the highest tide time, then based on the current reservoir water level, the current tide level, and the current tide indicator, the automatic reverse power generation start-up procedure and the automatic reverse power generation shutdown procedure will be executed: if the current reservoir water level is less than the preset upper limit of the reservoir water level and the current tide level is greater than the preset reverse power generation forced start tide level, the automatic reverse power generation start-up procedure will be executed; after the automatic reverse power generation start-up procedure is completed, if it is detected that the current reservoir water level is not less than the preset upper limit of the reservoir water level, the automatic reverse power generation shutdown procedure will be executed.

[0033] If the current time is greater than the time of the highest tide, then the process of determining the end of the tide will begin.

[0034] The aforementioned start-up and shutdown conditions include forward power generation start-up conditions, forward power generation shutdown conditions, reverse power generation start-up conditions, and reverse power generation shutdown conditions. Forward power generation start-up conditions can be the forward power generation start-up time, forward power generation start-up tide level, and forward power generation start-up head, as well as combinations thereof, obtained from experience database queries or optimized scheduling calculations. Forward power generation shutdown conditions can be the forward power generation shutdown time, forward power generation shutdown tide level, and forward power generation shutdown head, as well as combinations thereof, obtained from experience database queries or optimized scheduling calculations. Reverse power generation start-up conditions can be the reverse power generation start-up time, reverse power generation start-up tide level, and reverse power generation start-up head, as well as combinations thereof, obtained from experience database queries or optimized scheduling calculations. Reverse power generation shutdown conditions can be the reverse power generation shutdown time, reverse power generation shutdown tide level, and reverse power generation shutdown head, as well as combinations thereof, obtained from experience database queries or optimized scheduling calculations.

[0035] In another implementation, the automatic start-up process for forward and reverse power generation is based on the number of generators to be started, calculated using a preset or optimized scheduling mechanism, and the generators are started sequentially from high to low priority. Similarly, the automatic shutdown process for forward and reverse power generation is based on the number of generators to be started, calculated using a preset or optimized scheduling mechanism, and the generators are shut down sequentially from high to low priority.

[0036] For details, please refer to (1-1) to (1-9) below: (1-1) Determine whether the measured tide level has dropped and passed 0 (i.e., the reference surface where the tide level is 0). If yes, update the forecast of the current highest tide level, the forecast of the current lowest tide level, and the forecast of the current highest tide level, and then proceed to the next step. Otherwise, go to (1-3).

[0037] (1-2) Determine whether the predicted current tide level is greater than the spring tide level. If yes, the current tide marker is equal to the spring tide, and then execute (1-3). Otherwise, the current tide marker is equal to the neap tide, and then execute (1-3).

[0038] (1-3) Determine the time period in which the current time is located. If the current time is less than or equal to the predicted time of the lowest tide, then execute (1-4). If the predicted time of the lowest tide is less than or equal to the predicted time of the highest tide, then proceed to (1-7). If the current time is in another time period, then proceed to (1-6).

[0039] (1-4) Determine whether the current reservoir water level is greater than the lower limit of the reservoir water level and (the current tide level is less than the tide level for forced start of forward power generation, or the conditions for start of forward power generation are met). If yes, execute the automatic start-up process for forward power generation and then execute (1-5). Otherwise, proceed to (1-6).

[0040] (1-5) Determine whether the current reservoir water level is ≤ the lower limit of the reservoir water level, or whether the conditions for forward power generation shutdown are met. If yes, execute the forward power generation automatic shutdown process, and then execute (1-6). Otherwise, continue to execute (1-5).

[0041] (1-6) Determine whether to end the program. If yes, end the program; otherwise, go to (1-1).

[0042] (1-7) Determine if the current tide indicator is equal to the spring tide. If yes, execute (1-8); otherwise, go to (1-6).

[0043] (1-8) Determine whether the current reservoir water level is less than the upper limit of the reservoir water level and (current tide level is greater than the tide level at which reverse power generation is forced to start, or if the reverse power generation start-up conditions are met). If so, execute the reverse power generation automatic start-up process and then execute (1-9). Otherwise, go to (1-6).

[0044] (1-9) Determine whether the current reservoir water level is greater than or equal to the upper limit of the reservoir water level, or whether the reverse power generation shutdown condition is met. If yes, execute the reverse power generation automatic shutdown process and then proceed to (1-6). Otherwise, continue to execute (1-9).

[0045] See Figure 3 The flowchart of a gate opening and closing control method is shown. This embodiment of the invention also provides an implementation method for gate opening and closing control, which determines whether to implement an automatic gate opening or automatic gate closing process for the spillway based on the current time period, the current tide indicator, the upper limit and lower limit of the reservoir water level, the forced gate opening order after the forward power generation shutdown and the forced gate opening order after the reverse power generation shutdown, and the gate opening and closing conditions.

[0046] In one implementation, if the current time is greater than the lowest tide time and less than the time when the current tide rises above zero, then the automatic gate opening procedure for forward power generation, the automatic gate closing procedure for forward power generation, the automatic gate opening procedure for unidirectional power generation, and the automatic gate closing procedure for unidirectional power generation are executed: When the current tide indicator is spring tide, if the current reservoir water level is higher than the preset lower limit of the reservoir water level and a forced gate opening order is received after the forward power generation shutdown, the forward power generation automatic gate opening process will be executed. After the forward power generation automatic gate opening process is completed, if the current time is higher than the lowest tide time and less than half of the sum of the tide passing 0 and the highest tide time, or if the current reservoir water level is not higher than the preset lower limit of the reservoir water level, the forward power generation automatic gate closing process will be executed.

[0047] When the current tide is neap tide, if the current reservoir water level is higher than the preset lower limit of the reservoir water level and a forced gate opening order is received after the forward power generation shutdown, the one-way power generation automatic gate opening process is executed. After the one-way power generation automatic gate opening process is completed, if the current time is higher than the highest tide time and lower than the tide passing 0 time, or if the current reservoir water level is not lower than the preset upper limit of the reservoir water level, the one-way power generation automatic gate closing process is executed.

[0048] If the current time is greater than half the sum of the high tide time and the highest tide time, but less than the low tide time, then the reverse power generation automatic gate opening procedure and the reverse power generation automatic gate closing procedure will be executed: If the current reservoir water level is less than the preset upper limit of the reservoir water level and a forced gate opening order is received after the reverse power generation shutdown, the reverse power generation automatic gate opening procedure will be executed. After the reverse power generation automatic gate opening procedure is completed, if the current time is greater than the highest tide time and less than the low tide time, and the current reservoir water level is not less than the preset upper limit of the reservoir water level, then the reverse power generation automatic gate closing procedure will be executed.

[0049] If the current time is in another time period, then proceed to the termination determination process.

[0050] The aforementioned gate opening and closing conditions include forward power generation opening conditions, forward power generation closing conditions, reverse power generation opening conditions, reverse power generation closing conditions, unidirectional power generation opening conditions, and unidirectional power generation closing conditions. Forward power generation opening conditions can be the forward power generation opening time, forward power generation opening tide level, forward power generation opening head, and combinations thereof, obtained from experience database queries or optimized scheduling calculations. Forward power generation closing conditions can be the forward power generation closing time, forward power generation closing tide level, forward power generation closing head, and combinations thereof, obtained from experience database queries or optimized scheduling calculations. Reverse power generation opening conditions can be the reverse power generation opening time, reverse power generation opening tide level, reverse power generation opening head, and combinations thereof, obtained from experience database queries or optimized scheduling calculations. Reverse power generation closing conditions can be the reverse power generation closing time, reverse power generation closing tide level, reverse power generation closing head, and combinations thereof, obtained from experience database queries or optimized scheduling calculations. The conditions for unidirectional power generation gate opening can be the unidirectional power generation gate opening time, unidirectional power generation gate opening tide level, unidirectional power generation gate opening head, and combinations thereof, obtained from experience database queries or optimized scheduling calculations. The conditions for unidirectional power generation gate closing can be the unidirectional power generation gate closing time, unidirectional power generation gate closing tide level, unidirectional power generation gate closing head, and combinations thereof, obtained from experience database queries or optimized scheduling calculations.

[0051] In another implementation, the automatic gate opening process for forward power generation, the automatic gate opening process for reverse power generation, and the automatic gate opening process for unidirectional power generation are based on the number of gates to be opened calculated by preset or optimized scheduling, and the gates are opened sequentially from high to low according to the gate opening priority.

[0052] The automatic gate shut-off process for forward power generation, reverse power generation, and unidirectional power generation is based on the number of gates to be opened calculated by preset or optimized scheduling. The gates are closed sequentially from high to low according to the gate shut-off priority.

[0053] In addition, "measured tide level falling and passing zero" means that the measured tide level at the current moment is ≤0 and the measured tide level at the previous moment is >0; "forecast current tide" refers to the forecast tide level curve from the time when the previous forecast tide level falling and passing zero occurred to the time when the next forecast tide level falling and passing zero occurred; "forecast current tide highest tide level" refers to the forecast maximum tide level of the current tide; "forecast current tide highest tide level time" refers to the time when the forecast minimum tide level of the current tide occurred; "forecast current tide lowest tide level time" refers to the time when the forecast minimum tide level of the current tide occurred; "forecast current tide ebb tide passing zero" refers to the time when the forecast tide level falls and passes zero; "forecast current tide rise tide passing zero" refers to the time when the forecast tide level rises and passes zero; "forecast tide level falling and passing zero" means that the forecast tide level at the current moment is ≤0 and the forecast tide level at the previous moment is >0; "forecast tide level rising and passing zero" means that the forecast tide level at the current moment is ≥0 and the forecast tide level at the previous moment is <0.

[0054] For details, please refer to (2-1) to (2-12) below: (2-1) Determine whether the measured tide level has dropped and passed 0. If yes, update the forecast of the current tide's highest tide level, the forecast of the current tide's lowest tide level, the forecast of the current tide's highest tide level, the forecast of the current tide's rising tide passing 0, and the forecast of the current tide's falling tide passing 0, and then execute (2-2). Otherwise, go to (2-3).

[0055] (2-2) Determine whether the predicted current tide level is greater than the spring tide level. If yes, the current tide marker is spring tide, and then execute (2-3). Otherwise, the current tide marker is neap tide, and then execute (2-3).

[0056] (2-3) Determine the time period at which the current time is located. If the predicted time of the lowest tide is less than the current time, and the predicted time of the rising tide is less than the 0 time, then execute (2-4). If (the predicted time of the rising tide is less than the predicted time of the highest tide) / 2 is less than the current time, then proceed to (2-10). If the current time is in another time period, then proceed to (2-7).

[0057] (2-4) Determine if the current tide indicator is equal to the spring tide. If yes, execute (2-5); otherwise, proceed to (2-8).

[0058] (2-5) Determine whether the current reservoir water level is greater than the lower limit of the reservoir water level, and (receive a forced gate opening order after the forward power generation shutdown, or meet the conditions for the forward power generation gate opening). If yes, execute the forward power generation automatic gate opening process, and then execute (2-6). Otherwise, proceed to (2-7).

[0059] (2-6) Determine whether (the predicted time of the lowest tide level of the current tide is < the current time is < (the predicted time of the current tide rising above 0 + the predicted time of the highest tide level of the current tide) / 2, and the conditions for closing the gate for positive power generation are met), or the current reservoir water level is ≤ the lower limit of the reservoir water level. If yes, execute the automatic gate closing process for positive power generation, and then execute (2-7). Otherwise, continue to execute (2-6).

[0060] (2-7) Determine whether to end the program. If yes, end the program; otherwise, go to (2-1).

[0061] (2-8) Determine whether the current reservoir water level is greater than the lower limit of the reservoir water level, and (receive a forced gate opening order after the forward power generation shutdown, or meet the conditions for unidirectional power generation gate opening). If yes, execute the unidirectional power generation automatic gate opening process and execute (2-9); otherwise, go to (2-7).

[0062] (2-9) Determine whether (the predicted time of the current tide peak < the current time < the predicted time of the current tide ebb and 0, and the one-way power generation gate closure condition is met), or the current reservoir water level ≥ the upper limit of the reservoir water level. If yes, execute the one-way power generation automatic gate closure process and then go to (2-7). Otherwise, continue to execute (2-9).

[0063] (2-10) Determine whether the current tide marker is equal to the spring tide. If yes, execute (2-11); otherwise, go to (2-7).

[0064] (2-11) Determine whether the current reservoir water level is less than the upper limit of the reservoir water level, and (receive a forced gate opening order after the reverse power generation shutdown, or meet the reverse power generation gate opening conditions). If yes, execute the reverse power generation automatic gate opening process, and then execute (2-12). Otherwise, go to (2-7).

[0065] (2-12) Determine whether (the predicted time of the current tide peak < the current time < the predicted time of the current tide ebb and 0, and the reverse power generation gate opening condition is met), or the current reservoir water level ≥ the upper limit of the reservoir water level. If yes, execute the reverse power generation automatic gate closing process, and then go to (2-7). Otherwise, continue to execute (2-12).

[0066] In practical applications, the start-up conditions, shutdown conditions, start-up conditions, and shutdown conditions for forward power generation are obtained by optimizing the scheduling, specifically using the start-up time, shutdown head (i.e., the head is the difference in water levels inside and outside the reservoir), start-up time, and shutdown head for reverse power generation. Similarly, the gate opening conditions, gate closing conditions, and unidirectional gate opening and closing conditions are obtained by optimizing the scheduling, specifically using the gate opening head, gate closing head, reverse gate opening head, reverse gate closing head, unidirectional gate opening head, and unidirectional gate closing head for forward and reverse power generation. The number of generators started and the number of gates opened are also determined by optimized scheduling. The tide level for high tide is 2.2m.

[0067] The embodiments of the present invention were applied to the Jiangxia Tidal Test Power Station in Wenling, Zhejiang Province. The actual test results are shown in Table 1. It can be seen that the present invention is feasible. Through optimized scheduling calculations, the power generation can be increased under both spring tide and neap tide conditions.

[0068] Table 1 Measured Results

[0069] In summary, this invention enables the start-up and shutdown control processes and the gate control processes to be executed independently based on tidal characteristic data, allowing the two processes to run in parallel without dependence on each other. When the unit cannot start or stop normally due to a fault, the gate control process can still independently execute the automatic opening or closing of the spillway gate based on tidal data, and vice versa. This ensures that a fault in one control process will not cause the other process to stall, effectively improving the robustness of the control system.

[0070] Furthermore, by standardizing the elements in the start-up and shutdown conditions and the gate opening and closing conditions into tidal characteristic times, characteristic tide levels, and characteristic heads, and expressing them in a logical combination manner, this invention enables both the experience base query results and the optimized scheduling calculation results to be input in this standardized format and recognized and executed by the process. Regardless of whether the decision comes from the experience base or the optimized scheduling, it can be adapted to this control process.

[0071] This invention can also use the current time period as the primary judgment condition for the start-up and shutdown control process and the gate opening and closing control process. Only after the time period restriction is met will other conditions be used to determine whether to start up or open the gate. This makes the process very convenient to put into operation and withdraw. When the automatic control process is temporarily withdrawn due to equipment failure or maintenance and then put back into operation, the automatic control process can quickly determine whether to execute the forward generation automatic start-up and shutdown, reverse generation automatic start-up and shutdown, forward generation automatic gate opening and closing, reverse generation automatic gate opening and closing, unidirectional generation automatic gate opening and closing, or wait based on the current time period. It does not need to wait for the next low tide to arrive after 0 o'clock and then judge and execute according to the forward and reverse generation sequence.

[0072] Regarding the decoupling control method for the spillway gate of a tidal power station unit provided in the foregoing embodiments, this invention provides a decoupling control device for the spillway gate of a tidal power station unit. See [link to relevant documentation]. Figure 4 The diagram shows a decoupling control device for a tidal power station unit's spillway gate. The device includes the following components: The information acquisition module 402 acquires the highest tide level, the time of the highest tide level, and the time of the lowest tide level when the tide level drops and falls below the reference surface where the tide level is 0. The tide level judgment module 404 compares the highest tide level with the preset spring tide judgment tide level to determine the current tide indicator. The current tide indicator includes spring tide and neap tide. When the current tide indicator is spring tide, it is allowed to enter the forward and reverse automatic power generation start-up and start-up process and the forward and reverse automatic power generation gate opening and closing process. When the current tide indicator is neap tide, it is allowed to enter the forward automatic power generation start-up and start-up process and the unidirectional automatic power generation gate opening and closing process. The decoupling control module 406 executes the power-on / off control process based on the highest tide level, highest tide level time, lowest tide level time, and current tide indicator, and executes the gate opening / closing control process based on the highest tide level, highest tide level time, lowest tide level time, current tide indicator, tide passing zero and tide passing zero, so as to complete the decoupling control of power-on / off and gate opening / closing.

[0073] The decoupling control device for the spillway gate of the tidal power station provided in this application embodiment can decouple the control processes of the unit and the spillway gate, thereby significantly improving the robustness and process compatibility of the power station control.

[0074] In one embodiment, when performing the step of executing the power-on / off control process based on the highest tide level, the highest tide time, the lowest tide time, and the current tide indicator, the decoupling control module 406 is further configured to: if the current time is not greater than the lowest tide time, then execute the forward power generation automatic start-up process and the forward power generation automatic shutdown process based on the current reservoir water level and the current tide level; if the current time is greater than the lowest tide time but not greater than the highest tide time, then execute the reverse power generation automatic start-up process and the reverse power generation automatic shutdown process based on the current reservoir water level, the current tide level, and the current tide indicator; if the current time is greater than the highest tide time, then proceed to the termination determination process.

[0075] In one embodiment, when performing the steps of executing the automatic start-up process and the automatic shutdown process of forward power generation, the decoupling control module 406 is further configured to: execute the automatic start-up process of forward power generation when the current reservoir water level is greater than the preset lower limit of the reservoir water level and the current tide level is less than the preset forced start-up tide level of forward power generation; and execute the automatic shutdown process of forward power generation if the current reservoir water level is detected to be less than the preset lower limit of the reservoir water level after the automatic start-up process of forward power generation is completed.

[0076] In one embodiment, when performing the steps of executing the automatic reverse power generation start-up process and the automatic reverse power generation shutdown process, the decoupling control module 406 is further configured to: execute the automatic reverse power generation start-up process when the current reservoir water level is lower than the preset upper limit of the reservoir water level and the current tide level is higher than the preset tide level for forced reverse power generation start-up; and execute the automatic reverse power generation shutdown process after the automatic reverse power generation start-up process is completed if it is detected that the current reservoir water level is not lower than the preset upper limit of the reservoir water level.

[0077] In one embodiment, when performing the step of executing the gate opening and closing control process based on the highest tide level, highest tide time, lowest tide time, current tide marker, rising tide zero-crossing time, and falling tide zero-crossing time of the current tide, the decoupling control module 406 is further configured to: if the current time is greater than the lowest tide time and less than the rising tide zero-crossing time of the current tide, then execute the forward power generation automatic gate opening process, the forward power generation automatic gate closing process, the unidirectional power generation automatic gate opening process, and the unidirectional power generation automatic gate closing process; if the current time is greater than half of the sum of the rising tide zero-crossing time and the highest tide time, and less than the falling tide zero-crossing time of the current tide, then execute the reverse power generation automatic gate opening process and the reverse power generation automatic gate closing process; if the current time is in other time periods, then proceed to the termination determination process.

[0078] In one embodiment, when performing the steps of executing the automatic gate opening process for forward power generation, the automatic gate closing process for forward power generation, the automatic gate opening process for unidirectional power generation, and the automatic gate closing process for unidirectional power generation, the decoupling control module 406 is further configured to: when the current tide indicator is a spring tide, if the current reservoir water level is greater than the preset lower limit of the reservoir water level, and a forced gate opening command is received after the forward power generation shutdown, then execute the automatic gate opening process for forward power generation; after completing the automatic gate opening process for forward power generation, if the current time is greater than the lowest tide time and less than the time when the high tide passes zero, If the current water level is half the sum of the highest tide time and the lowest tide time, or if the current reservoir water level is not greater than the preset lower limit of the reservoir water level, then the forward power generation automatic gate closing procedure will be executed; if the current tide is marked as a neap tide, and the current reservoir water level is greater than the preset lower limit of the reservoir water level, and a forced gate opening order is received after the forward power generation shutdown, then the one-way power generation automatic gate opening procedure will be executed; after the one-way power generation automatic gate opening procedure is completed, if the current time is greater than the highest tide time and less than the time when the tide has passed 0, or if the current reservoir water level is not less than the preset upper limit of the reservoir water level, then the one-way power generation automatic gate closing procedure will be executed.

[0079] In one embodiment, when performing the automatic gate opening and automatic gate closing procedures for reverse power generation, the decoupling control module 406 is further configured to: execute the automatic gate opening procedure for reverse power generation when the current reservoir water level is lower than the preset upper limit of the reservoir water level and a forced gate opening order is received after the reverse power generation shutdown; and execute the automatic gate closing procedure for reverse power generation after the automatic gate opening procedure is completed, if the current time is greater than the highest tide time and less than the tide passing 0 time, and the current reservoir water level is not less than the preset upper limit of the reservoir water level.

[0080] The device provided in this embodiment of the invention has the same implementation principle and technical effect as the aforementioned method embodiment. For the sake of brevity, any parts not mentioned in the device embodiment can be referred to the corresponding content in the aforementioned method embodiment.

[0081] This invention provides a server, specifically, the server includes a processor and a storage device; the storage device stores a computer program, which, when run by the processor, executes the method described in any of the above embodiments.

[0082] Figure 5 This is a schematic diagram of the structure of a server provided in an embodiment of the present invention. The server 100 includes: a processor 50, a memory 51, a bus 52 and a communication interface 53. The processor 50, the communication interface 53 and the memory 51 are connected through the bus 52. The processor 50 is used to execute executable modules, such as computer programs, stored in the memory 51.

[0083] The memory 51 may include high-speed random access memory (RAM) or non-volatile memory, such as at least one disk storage device. Communication between this system network element and at least one other network element is achieved through at least one communication interface 53 (which can be wired or wireless), such as the Internet, wide area network, local area network, metropolitan area network, etc.

[0084] Bus 52 can be an ISA bus, PCI bus, or EISA bus, etc. The bus can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 5 The symbol is represented by a single double-headed arrow, but this does not mean that there is only one bus or one type of bus.

[0085] The memory 51 is used to store programs. After receiving an execution instruction, the processor 50 executes the programs. The method executed by the device for defining the flow process disclosed in any of the foregoing embodiments of the present invention can be applied to the processor 50 or implemented by the processor 50.

[0086] Processor 50 may be an integrated circuit chip with signal processing capabilities. In implementation, each step of the above method can be completed by the integrated logic circuitry in the hardware of processor 50 or by instructions in software form. Processor 50 can be a general-purpose processor, including a Central Processing Unit (CPU), a Network Processor (NP), etc.; it can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this invention. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this invention can be directly embodied in the execution of a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules can reside in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. The storage medium is located in memory 51. The processor 50 reads the information in memory 51 and, in conjunction with its hardware, completes the steps of the above method.

[0087] The computer program product of the readable storage medium provided in the embodiments of the present invention includes a computer-readable storage medium storing program code. The instructions included in the program code can be used to execute the methods described in the foregoing method embodiments. For specific implementation, please refer to the foregoing method embodiments, which will not be repeated here.

[0088] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, essentially, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0089] Finally, it should be noted that the above-described embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit it. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A decoupling control method for the spillway gate of a tidal power station unit, characterized in that, The method includes: When the tide level drops and falls below the datum level where the tide level is 0, obtain the highest tide level, the time of the highest tide level, and the time of the lowest tide level for the current tide. The highest tide level is compared with the preset high tide level to determine the current tide indicator. The current tide indicator includes high tide and low tide. When the current tide indicator is high tide, the automatic power generation start-up and shutdown process for forward and reverse power generation and the automatic power generation gate opening and closing process for forward and reverse power generation are allowed. When the current tide indicator is low tide, the automatic power generation start-up and shutdown process for forward power generation and the automatic power generation gate opening and closing process for unidirectional power generation are allowed. Based on the highest tide level, the highest tide time, the lowest tide time, and the current tide indicator, the power-on / off control process is executed, and based on the highest tide level, the highest tide time, the lowest tide time, the current tide indicator, the time when the tide rises above zero, and the time when the tide falls below zero, the gate opening / closing control process is executed to complete the decoupling control of power-on / off and gate opening / closing.

2. The decoupling control method for the spillway gate of a tidal power station unit according to claim 1, characterized in that, The step of executing the power-on / off control process based on the highest tide level, the highest tide time, the lowest tide time, and the current tide flag includes: If the current time is not greater than the lowest tide time, then the forward power generation automatic start-up process and the forward power generation automatic shutdown process are executed according to the current reservoir water level and the current tide level. If the current time is greater than the lowest tide time but not greater than the highest tide time, then the reverse power generation automatic start-up process and the reverse power generation automatic shutdown process are executed according to the current reservoir water level, the current tide level and the current tide flag. If the current time is greater than the highest tide time, then the process ends.

3. The decoupling control method for the spillway gate of a tidal power station unit according to claim 2, characterized in that, The steps for executing the automatic start-up and automatic shutdown procedures for forward power generation include: When the current reservoir water level is greater than the preset lower limit of the reservoir water level and the current tide level is less than the preset tide level for forced start-up of forward power generation, the automatic start-up process of forward power generation is executed. After the automatic start-up process of the forward power generation is completed, if it is detected that the current reservoir water level is not greater than the preset lower limit of the reservoir water level, the automatic shutdown process of the forward power generation is executed.

4. The decoupling control method for the spillway gate of a tidal power station unit according to claim 2, characterized in that, The steps for executing the automatic reverse power generation start-up procedure and the automatic reverse power generation shutdown procedure include: When the current reservoir water level is lower than the preset upper limit of the reservoir water level and the current tide level is higher than the preset tide level for forced reverse power generation, the automatic reverse power generation start-up process is executed. After the automatic reverse power generation start-up process is completed, if the current reservoir water level is detected to be not less than the preset upper limit of the reservoir water level, the automatic reverse power generation shutdown process is executed.

5. The decoupling control method for the spillway gate of a tidal power station unit according to claim 1, characterized in that, The steps of executing the gate opening / closing control procedure based on the current tide's highest tide level, highest tide time, lowest tide time, current tide marker, tide crossing zero, and tide crossing zero include: If the current time is greater than the lowest tide time and less than the current tide's rising tide time, then execute the forward power generation automatic gate opening process, the forward power generation automatic gate closing process, the unidirectional power generation automatic gate opening process, and the unidirectional power generation automatic gate closing process. If the current time is greater than half of the sum of the high tide passing zero time and the highest tide time, but less than the current tide passing zero time, then the reverse power generation automatic gate opening process and the reverse power generation automatic gate closing process are executed. If the current time is in another time period, then proceed to the termination determination process.

6. The decoupling control method for the spillway gate of a tidal power station unit according to claim 5, characterized in that, The steps for executing the automatic gate opening procedure for forward power generation, the automatic gate closing procedure for forward power generation, the automatic gate opening procedure for unidirectional power generation, and the automatic gate closing procedure for unidirectional power generation include: When the current tide indicator is a spring tide, if the current reservoir water level is greater than the preset lower limit of the reservoir water level, and a forced gate opening order is received after the forward power generation shutdown, then the forward power generation automatic gate opening process is executed. After the forward power generation automatic gate opening process is completed, if the current time is greater than the lowest tide time and less than half of the sum of the tide passing zero time and the highest tide time, or if the current reservoir water level is not greater than the preset reservoir water level lower limit, then the forward power generation automatic gate closing process is executed. When the current tide indicator is a neap tide, if the current reservoir water level is greater than the preset lower limit of the reservoir water level, and a forced gate opening order is received after the forward power generation shutdown, then the one-way power generation automatic gate opening process is executed. After the unidirectional power generation automatic gate opening process is completed, if the current time is greater than the highest tide time and less than the tide passing 0 time, or the current reservoir water level is not less than the preset upper limit of the reservoir water level, then the unidirectional power generation automatic gate closing process is executed.

7. The decoupling control method for the spillway gate of a tidal power station unit according to claim 5, characterized in that, The steps for executing the automatic reverse power generation opening and closing procedures include: When the current reservoir water level is lower than the preset upper limit of the reservoir water level, and a forced gate opening order is received after the reverse power generation shutdown, the reverse power generation automatic gate opening process is executed. After the reverse power generation automatic gate opening process is completed, if the current time is greater than the highest tide time and less than the tide passing 0 time, and the current reservoir water level is not less than the preset upper limit of the reservoir water level, then the reverse power generation automatic gate closing process is executed.

8. A decoupling control device for the spillway gate of a tidal power station unit, characterized in that, The device includes: The information acquisition module acquires the highest tide level, the time of the highest tide level, and the time of the lowest tide level when the tide level drops and falls below the reference level of 0. The tide level determination module compares the highest tide level with the preset spring tide determination tide level to determine the current tide indicator. The current tide indicator includes spring tide and neap tide. When the current tide indicator is spring tide, the automatic start-up and shutdown process for forward and reverse power generation and the automatic gate opening and closing process for forward and reverse power generation are allowed. When the current tide indicator is neap tide, the automatic start-up and shutdown process for forward power generation and the automatic gate opening and closing process for unidirectional power generation are allowed. The decoupling control module executes a power-on / off control process based on the highest tide level, the highest tide time, the lowest tide time, and the current tide indicator, and executes a gate opening / closing control process based on the highest tide level, the highest tide time, the lowest tide time, the current tide indicator, the time when the tide rises above zero, and the time when the tide falls below zero, in order to complete the decoupling control of power-on / off and gate opening / closing.

9. A server, characterized in that, The method includes a processor and a memory, the memory storing computer-executable instructions executable by the processor, the processor executing the computer-executable instructions to implement the method of any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions that, when invoked and executed by a processor, cause the processor to perform the method according to any one of claims 1 to 7.

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