Technical water supply system of hydropower station and control method of technical water supply system

Abstract

The invention relates to the technical field of hydropower station technical water supply, in particular to a hydropower station technical water supply system and a control method thereof. Comprising a first water supply unit used for connecting a tail water pool and a unit and further used for injecting a water source in the tail water pool into the unit; the second water supply unit is used for connecting the pressure steel pipe and the unit, and the second water supply unit is further used for injecting a water source in the pressure steel pipe into the unit; the central control unit is used for setting working parameters of the first water supply unit and the second water supply unit; the first water supply unit and the second water supply unit are arranged, the tail water pool and the penstock are used for counting and supplying water to the unit, the utilization efficiency of a water source is improved, meanwhile, a water volume prediction curve is established, water is pumped from the tail water pool through a water pump in a dry season, the water source in the penstock is saved, and the power generation efficiency of the water source in the penstock is improved. In the wet season, water is taken through the pressure steel pipe for unit technology water supply, and the operation and maintenance cost is saved.

Description

Technical Field

[0001] The present application relates to the technical field of water supply for hydropower stations, and in particular to a technical water supply system for hydropower stations and a control method thereof. Background Art

[0002] The technical water supply system is one of the three major auxiliary equipment systems of a hydropower station. Its main function is to supply cooling and fire-fighting water to the turbine generator set and its auxiliary equipment. It is an important guarantee for the safe and economic operation of the power station. The system is mainly composed of a water supply pump group, a water supply network and various water-using equipment (main transformer cooler, generator cooler and main shaft seal, etc.).

[0003] In hydropower stations, water is often taken from pressure steel pipes to supply technical water to the units. At this time, the high-head technical water supply must be reduced in pressure by a pressure reducing valve to supply the technical water supply to the units, instead of generating electricity through the turbine generator set, which wastes water resources. Summary of the invention

[0004] The purpose of this application is: to solve the above-mentioned technical problems, this application provides a hydropower station technical water supply system and its control method, aiming to improve the utilization efficiency of the water source of the hydropower station and reduce the operation and maintenance costs of the hydropower station.

[0005] In some embodiments of the present application, by setting up a first water supply unit and a second water supply unit, the tailwater tank and the pressure steel pipe are used to count and supply water to the unit, thereby improving the utilization efficiency of the water source. At the same time, by establishing a water volume prediction curve, water is pumped from the tailwater tank through a water pump during the dry season, saving the water source in the pressure steel pipe and improving the power generation efficiency of the water source in the pressure steel pipe. During the flood season, water is taken from the pressure steel pipe to supply technical water to the unit, saving operation and maintenance costs.

[0006] In some embodiments of the present application, by setting a three-level control mode, the switching parameters of the first water supply unit and the second water supply unit are dynamically set according to the real-time water volume evaluation value, and the optimal water supply line is selected for technical water supply of the unit, thereby improving the overall operating efficiency of the system and reducing the operation and maintenance cost of the technical water supply of the unit.

[0007] In some embodiments of the present application, a technical water supply system for a hydropower station is provided, comprising:

[0008] The first water supply unit is used to connect the tailwater pool and the unit, and the second water supply unit is also used to inject water from the tailwater pool into the unit;

[0009] A second water supply unit is used to connect the pressure steel pipe and the unit, and the first water supply unit is also used to inject the water source in the pressure steel pipe into the unit;

[0010] A central control unit, used to set working parameters of the first water supply unit and the second water supply unit;

[0011] The central control unit comprises:

[0012] The first processing module is used to establish a water volume prediction model and generate a water volume prediction curve according to the water volume evaluation model;

[0013] The second processing module is used to establish multiple adjustment cycles and generate a water volume evaluation value in each adjustment cycle according to the water volume monitoring curve;

[0014] The first control module is used to set the water supply control mode of the unit according to the water volume evaluation value. The first control module is also used to set the water supply parameters in each adjustment cycle according to the water supply control mode of the unit.

[0015] In some embodiments of the present application, the second processing module is further used to:

[0016] According to the water volume prediction curve, the target sub-prediction curve corresponding to the current regulation period is intercepted;

[0017] Establish multiple time intervals and generate water volume forecast reference values ​​for target sub-forecast curves in each time interval;

[0018] Establish a water volume forecast reference value series A, A = (a1, a2...an), where ai is the water volume forecast reference value of the i-th time interval; n is the number of time intervals;

[0019] Generate the water volume evaluation value b of the current regulation cycle according to the water volume prediction reference value series A;

[0020]

[0021] Among them, P is a correction coefficient set based on the credibility of the target sub-prediction curve; e1 is a preset first weight coefficient, e2 is a preset second weight coefficient; Q1 is a preset first fixed coefficient, and Q2 is a preset second fixed coefficient.

[0022] In some embodiments of the present application, the first control module is further used to:

[0023] Preset a first water volume evaluation value interval (B1, B2), a second water volume evaluation value interval (B2, B3) and a third water volume evaluation value interval (B3, B4);

[0024] If the water volume evaluation value b is within the preset first water volume evaluation value interval, the current adjustment cycle is set to the first-level water supply control mode, and the water supply parameters of the first water supply unit are generated;

[0025] If the water volume evaluation value b is within the preset second water volume evaluation value interval, the current adjustment cycle is set to the secondary water supply control mode;

[0026] If the water volume evaluation value b is within the preset third water volume evaluation value interval, the current adjustment cycle is set to the third-level water supply control mode, and the water supply parameters of the second water supply unit are generated.

[0027] In some embodiments of the present application, the first control module is further used to:

[0028] When the current regulation cycle is the secondary water supply control mode, obtain the technical water supply demand H in the current regulation cycle;

[0029] Generate multiple primary water supply plans within the current regulation cycle according to the technical water supply demand h;

[0030] Establish a primary water supply plan sequence F, F = (f1, f2...fm), where fi is the ith primary water supply plan; m is the number of primary water supply plans.

[0031] In some embodiments of the present application, the central control unit further includes:

[0032] The second control module is used to sequentially set fi as the target primary water supply plan according to the primary water supply plan sequence F;

[0033] Generate an operation evaluation value d of the target primary water supply plan according to a preset evaluation model;

[0034]

[0035] Among them, gi is the reference value of the i-th operation evaluation index, and βi is the influencing factor of the i-th operation evaluation index;

[0036] Generate the operation evaluation value of each primary water supply plan in turn;

[0037] The second control module is also used to establish an operation evaluation value sequence D, D = (d1, d2 ... dm), where di is the operation evaluation value of the i-th primary water supply plan;

[0038] Set the primary water supply plan corresponding to the maximum operation evaluation value dmax in the operation evaluation value sequence D as the secondary water supply plan;

[0039] Set the water supply parameters within the current regulation cycle according to the secondary water supply plan.

[0040] In some embodiments of the present application, a control method for a technical water supply system of a hydropower station is provided, comprising:

[0041] Establish a water volume prediction model and generate a water volume prediction curve based on the water volume evaluation model;

[0042] Establish multiple regulation cycles and generate water volume evaluation values ​​in each regulation cycle based on the water volume monitoring curve;

[0043] The unit water supply control mode is set according to the water volume evaluation value, and the water supply plan within each adjustment cycle is set according to the unit water supply control mode.

[0044] In some embodiments of the present application, when generating the water volume evaluation value in each adjustment cycle, it includes:

[0045] According to the water volume prediction curve, the target sub-prediction curve corresponding to the current regulation period is intercepted;

[0046] Establish multiple time intervals and generate water volume forecast reference values ​​for target sub-forecast curves in each time interval;

[0047] Establish a water volume forecast reference value series A, A = (a1, a2...an), where ai is the water volume forecast reference value of the i-th time interval; n is the number of time intervals;

[0048] Generate the water volume evaluation value b of the current regulation cycle according to the water volume prediction reference value series A;

[0049]

[0050] Among them, P is a correction coefficient set based on the credibility of the target sub-prediction curve; e1 is a preset first weight coefficient, e2 is a preset second weight coefficient; Q1 is a preset first fixed coefficient, and Q2 is a preset second fixed coefficient.

[0051] In some embodiments of the present application, when the water supply control mode of the unit is set according to the water volume evaluation value, it includes:

[0052] Preset a first water volume evaluation value interval (B1, B2), a second water volume evaluation value interval (B2, B3) and a third water volume evaluation value interval (B3, B4);

[0053] If the water volume evaluation value b is within the preset first water volume evaluation value interval, the current adjustment cycle is set to the first-level water supply control mode;

[0054] If the water volume evaluation value b is within the preset second water volume evaluation value interval, the current adjustment cycle is set to the secondary water supply control mode;

[0055] If the water volume evaluation value b is in the preset third water volume evaluation value interval, the current adjustment cycle is set to the third-level water supply control mode.

[0056] In some embodiments of the present application, the secondary water supply mode includes:

[0057] Obtain the technical water supply demand H in the current regulation cycle;

[0058] Generate multiple primary water supply plans within the current regulation cycle according to the technical water supply demand h;

[0059] Establish a first-level water supply plan sequence F, F = (f1, f2...fm), where fi is the i-th first-level water supply plan; m is the number of first-level water supply plans;

[0060] Generate the operation evaluation value of each primary water supply plan in turn according to the preset evaluation model;

[0061] Establish an operation evaluation value sequence D, D = (d1, d2 ... dm), where di is the operation evaluation value of the i-th primary water supply plan;

[0062] Set the primary water supply plan corresponding to the maximum operation evaluation value dmax in the operation evaluation value sequence D as the secondary water supply plan;

[0063] Set water supply parameters within the current regulation cycle according to the secondary water supply plan;

[0064] The step of sequentially generating the operation evaluation values ​​of each primary water supply plan includes:

[0065] According to the primary water supply plan sequence F, fi is set as the target primary water supply plan in sequence;

[0066] Generate an operation evaluation value d of the target primary water supply plan according to a preset evaluation model;

[0067]

[0068] Among them, gi is the reference value of the i-th operation evaluation index, and βi is the influencing factor of the i-th operation evaluation index;

[0069] The operation evaluation value of each primary water supply plan is generated in turn.

[0070] Compared with the prior art, the technical water supply system and control method of a hydropower station in the embodiment of the present application have the following beneficial effects:

[0071] By setting up the first water supply unit and the second water supply unit, the tailwater tank and the pressure steel pipe are used to count and supply water to the unit, thereby improving the utilization efficiency of water sources. At the same time, by establishing a water volume prediction curve, water is pumped from the tailwater tank through a water pump during the dry season, saving the water source in the pressure steel pipe and improving the power generation efficiency of the water source in the pressure steel pipe. During the flood season, water is taken from the pressure steel pipe to supply technical water to the unit, saving operation and maintenance costs.

[0072] By setting a three-level control mode and dynamically setting the switching parameters of the first water supply unit and the second water supply unit according to the real-time water volume evaluation value, the optimal water supply line is selected for the technical water supply of the unit, thereby improving the overall operating efficiency of the system and reducing the operation and maintenance cost of the technical water supply of the unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0073] Figure 1It is a structural schematic diagram of a technical water supply system of a hydropower station in a preferred embodiment of the present application;

[0074] Figure 2 It is a flow chart of a method for controlling a technical water supply system of a hydropower station in a preferred embodiment of the present application. DETAILED DESCRIPTION

[0075] The specific implementation methods of the present application are further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present application but are not intended to limit the scope of the present application.

[0076] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0077] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0078] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0079] like Figure 1 As shown, a water supply system for a hydropower station according to a preferred embodiment of the present application is characterized in that it includes:

[0080] The first water supply unit is used to connect the tailwater tank and the unit, and the second water supply unit is also used to inject water from the tailwater tank into the unit;

[0081] The second water supply unit is used to connect the pressure steel pipe and the unit. The first water supply unit is also used to inject the water source in the pressure steel pipe into the unit;

[0082] A central control unit, used to set working parameters of the first water supply unit and the second water supply unit;

[0083] The central control unit includes:

[0084] The first processing module is used to establish a water volume prediction model and generate a water volume prediction curve according to the water volume evaluation model;

[0085] The second processing module is used to establish multiple adjustment cycles and generate a water volume evaluation value in each adjustment cycle according to the water volume monitoring curve;

[0086] The first control module is used to set the water supply control mode of the unit according to the water volume evaluation value. The first control module is also used to set the water supply parameters in each adjustment cycle according to the water supply control mode of the unit.

[0087] Specifically, the first water supply unit includes a natural tailwater tank, a water pump, a water filter, an electric gate valve, etc. A trash rack is installed in the tailwater tank, and the water intake is installed in the trash rack, and the technical water supply is pressurized to the unit by a water pump.

[0088] Specifically, the second water supply unit includes: an electric ball valve, an electric pressure reducing valve, a safety valve, and a water filter. Water is taken from the pressure steel pipe through the second water supply unit to supply technical water to the unit.

[0089] It can be understood that in the above embodiment, by establishing a water volume prediction curve, water is pumped from the tailwater pool through a water pump during the dry season, saving water in the pressure steel pipe and improving the power generation efficiency of the water in the pressure steel pipe. During the flood season, water is taken from the pressure steel pipe to supply technical water to the unit, saving operation and maintenance costs.

[0090] In a preferred embodiment of the present application, the second processing module is also used for:

[0091] According to the water volume prediction curve, the target sub-prediction curve corresponding to the current regulation period is intercepted;

[0092] Establish multiple time intervals and generate water volume forecast reference values ​​for target sub-forecast curves in each time interval;

[0093] Establish a water volume forecast reference value series A, A = (a1, a2...an), where ai is the water volume forecast reference value of the i-th time interval; n is the number of time intervals;

[0094] Generate the water volume evaluation value b of the current regulation cycle according to the water volume prediction reference value series A;

[0095]

[0096] Among them, P is a correction coefficient set based on the credibility of the target sub-prediction curve; e1 is a preset first weight coefficient, e2 is a preset second weight coefficient; Q1 is a preset first fixed coefficient, and Q2 is a preset second fixed coefficient.

[0097] Specifically, by presetting the first fixed coefficient and the second fixed coefficient, the system is normalized so that each indicator within the model is within the same value range. The higher the credibility of the target sub-prediction curve, the larger the corresponding correction coefficient.

[0098] Specifically, the larger the water volume evaluation value, the more abundant the water resources in the current regulation cycle, and the greater the water volume in the pressure steel pipe.

[0099] Specifically, the first control module is further used for:

[0100] Preset a first water volume evaluation value interval (B1, B2), a second water volume evaluation value interval (B2, B3) and a third water volume evaluation value interval (B3, B4);

[0101] If the water volume evaluation value b is within the preset first water volume evaluation value interval, the current adjustment cycle is set to the first-level water supply control mode, and the water supply parameters of the first water supply unit are generated;

[0102] If the water volume evaluation value b is within the preset second water volume evaluation value interval, the current adjustment cycle is set to the secondary water supply control mode;

[0103] If the water volume evaluation value b is within the preset third water volume evaluation value interval, the current adjustment cycle is set to the third-level water supply control mode, and the water supply parameters of the second water supply unit are generated.

[0104] Specifically, the primary water supply control mode means that during the dry season, by setting the control parameters of the primary water supply unit, water is pumped from the tailwater pool to complete the technical water supply of the unit and improve the power generation efficiency of the water source of the pressure steel pipe.

[0105] Specifically, the three-level water supply control mode means that during the flood season, the cost of drawing water from the pressure steel pipe is much lower than that from the tailwater pool. By setting the control parameters of the secondary water supply unit, water is drawn from the pressure steel pipe to supply technical water to the unit.

[0106] Specifically, in the above embodiment, by setting a three-level control mode, the switching parameters of the first water supply unit and the second water supply unit are dynamically set according to the real-time water volume evaluation value, and the optimal water supply line is selected for the technical water supply of the unit, thereby improving the overall operating efficiency of the system and reducing the operation and maintenance cost of the technical water supply of the unit.

[0107] In a preferred embodiment of the present application, the first control module is also used for:

[0108] When the current regulation cycle is the secondary water supply control mode, obtain the technical water supply demand H in the current regulation cycle;

[0109] Generate multiple primary water supply plans within the current regulation cycle according to the technical water supply demand h;

[0110] Establish a primary water supply plan sequence F, F = (f1, f2...fm), where fi is the ith primary water supply plan; m is the number of primary water supply plans.

[0111] Specifically, the central control unit also includes:

[0112] The second control module is used to sequentially set fi as the target primary water supply plan according to the primary water supply plan sequence F;

[0113] Generate an operation evaluation value d of the target primary water supply plan according to a preset evaluation model;

[0114]

[0115] Among them, gi is the reference value of the i-th operation evaluation index, and βi is the influencing factor of the i-th operation evaluation index;

[0116] Generate the operation evaluation value of each primary water supply plan in turn;

[0117] The second control module is also used to establish an operation evaluation value sequence D, D = (d1, d2 ... dm), where di is the operation evaluation value of the i-th primary water supply plan;

[0118] Set the primary water supply plan corresponding to the maximum operation evaluation value dmax in the operation evaluation value sequence D as the secondary water supply plan;

[0119] Set the water supply parameters within the current regulation cycle according to the secondary water supply plan.

[0120] Specifically, the evaluation indicators of the primary water supply plan include, but are not limited to, the cost of drawing water from the tailwater pool, the cost of drawing water from the penstock, the impact of drawing water from the penstock based on the current water volume on the unit's power generation efficiency, the credibility of the water volume prediction curve within the current regulation cycle, the number of water supply line switching times and switching frequency and other parameters. The larger the operating evaluation value, the greater the feasibility and comprehensive benefits of the corresponding primary water supply plan.

[0121] Specifically, a single primary water supply plan includes the water supply volume of the first water supply unit, the water supply volume of the second water supply unit, and the switching control parameters of the first water supply unit and the second water supply unit.

[0122] like Figure 2As shown, based on another preferred embodiment of a technical water supply system of a hydropower station in any of the above preferred embodiments, in this preferred embodiment, a control method of the technical water supply system of a hydropower station is provided, characterized in that it includes:

[0123] S101: Establish a water volume prediction model, and generate a water volume prediction curve according to the water volume evaluation model;

[0124] S102: Establish multiple adjustment cycles, and generate water volume evaluation values ​​in each adjustment cycle according to the water volume monitoring curve;

[0125] S103: setting the unit water supply control mode according to the water volume evaluation value, and setting the water supply plan in each adjustment cycle according to the unit water supply control mode.

[0126] Specifically, when generating the water volume evaluation value in each regulation cycle, it includes:

[0127] According to the water volume prediction curve, the target sub-prediction curve corresponding to the current regulation period is intercepted;

[0128] Establish multiple time intervals and generate water volume forecast reference values ​​for target sub-forecast curves in each time interval;

[0129] Establish a water volume forecast reference value series A, A = (a1, a2...an), where ai is the water volume forecast reference value of the i-th time interval; n is the number of time intervals;

[0130] Generate the water volume evaluation value b of the current regulation cycle according to the water volume prediction reference value series A;

[0131]

[0132] Among them, P is a correction coefficient set based on the credibility of the target sub-prediction curve; e1 is a preset first weight coefficient, e2 is a preset second weight coefficient; Q1 is a preset first fixed coefficient, and Q2 is a preset second fixed coefficient.

[0133] In a preferred embodiment of the present application, when the water supply control mode of the unit is set according to the water volume evaluation value, it includes:

[0134] Preset a first water volume evaluation value interval (B1, B2), a second water volume evaluation value interval (B2, B3) and a third water volume evaluation value interval (B3, B4);

[0135] If the water volume evaluation value b is within the preset first water volume evaluation value interval, the current adjustment cycle is set to the first-level water supply control mode;

[0136] If the water volume evaluation value b is within the preset second water volume evaluation value interval, the current adjustment cycle is set to the secondary water supply control mode;

[0137] If the water volume evaluation value b is in the preset third water volume evaluation value interval, the current adjustment cycle is set to the third-level water supply control mode.

[0138] Specifically, the secondary water supply modes include:

[0139] Obtain the technical water supply demand H in the current regulation cycle;

[0140] Generate multiple primary water supply plans within the current regulation cycle according to the technical water supply demand h;

[0141] Establish a first-level water supply plan sequence F, F = (f1, f2...fm), where fi is the i-th first-level water supply plan; m is the number of first-level water supply plans;

[0142] Generate the operation evaluation value of each primary water supply plan in turn according to the preset evaluation model;

[0143] Establish an operation evaluation value sequence D, D = (d1, d2 ... dm), where di is the operation evaluation value of the i-th primary water supply plan;

[0144] Set the primary water supply plan corresponding to the maximum operation evaluation value dmax in the operation evaluation value sequence D as the secondary water supply plan;

[0145] Set water supply parameters within the current regulation cycle according to the secondary water supply plan;

[0146] When generating the operation evaluation values ​​of each primary water supply plan in sequence, it includes:

[0147] According to the primary water supply plan sequence F, fi is set as the target primary water supply plan in sequence;

[0148] Generate an operation evaluation value d of the target primary water supply plan according to a preset evaluation model;

[0149]

[0150] Among them, gi is the reference value of the i-th operation evaluation index, and βi is the influencing factor of the i-th operation evaluation index;

[0151] The operation evaluation value of each primary water supply plan is generated in turn.

[0152] According to the first concept of the present application, by setting up the first water supply unit and the second water supply unit, the tailwater tank and the pressure steel pipe are used to count and supply water to the unit, thereby improving the utilization efficiency of the water source. At the same time, by establishing a water volume prediction curve, water is pumped from the tailwater tank through a water pump during the dry season, saving the water source in the pressure steel pipe and improving the power generation efficiency of the water source in the pressure steel pipe. During the flood season, water is taken from the pressure steel pipe to supply technical water to the unit, saving operation and maintenance costs.

[0153] According to the second concept of the present application, by setting a three-level control mode, the switching parameters of the first water supply unit and the second water supply unit are dynamically set according to the real-time water volume evaluation value, and the optimal water supply line is selected for the technical water supply of the unit, thereby improving the overall operating efficiency of the system and reducing the operation and maintenance cost of the technical water supply of the unit.

[0154] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present application. These improvements and substitutions should also be regarded as the scope of protection of the present application.

Claims

1. A technical water supply system for a hydropower station, characterized in that: include: A first water supply unit, used to connect the tailwater pool and the unit, and the first water supply unit is also used to inject water from the tailwater pool into the unit; A second water supply unit, used to connect the pressure steel pipe and the unit, and the second water supply unit is also used to inject the water source in the pressure steel pipe into the unit; A central control unit, used to set working parameters of the first water supply unit and the second water supply unit; The central control unit comprises: The first processing module is used to establish a water volume prediction model and generate a water volume prediction curve according to the water volume evaluation model; The second processing module is used to establish multiple adjustment cycles and generate a water volume evaluation value in each adjustment cycle according to the water volume monitoring curve; The first control module is used to set the water supply control mode of the unit according to the water volume evaluation value. The first control module is also used to set the water supply parameters in each adjustment cycle according to the water supply control mode of the unit.

2. The technical water supply system of a hydropower station according to claim 1, characterized in that: The second processing module is also used for: According to the water volume prediction curve, the target sub-prediction curve corresponding to the current regulation period is intercepted; Establish multiple time intervals and generate water volume forecast reference values ​​for target sub-forecast curves in each time interval; Establish a water volume forecast reference value series A, A = (a1, a2...an), where ai is the water volume forecast reference value of the i-th time interval; n is the number of time intervals; Generate the water volume evaluation value b of the current regulation period according to the water volume prediction reference value series A; Among them, P is a correction coefficient set based on the credibility of the target sub-prediction curve; e1 is a preset first weight coefficient, e2 is a preset second weight coefficient; Q1 is a preset first fixed coefficient, and Q2 is a preset second fixed coefficient.

3. The technical water supply system of a hydropower station according to claim 2, characterized in that: The first control module is also used for: Preset a first water volume evaluation value interval (B1, B2), a second water volume evaluation value interval (B2, B3) and a third water volume evaluation value interval (B3, B4); If the water volume evaluation value b is within the preset first water volume evaluation value interval, the current adjustment cycle is set to the first-level water supply control mode, and the water supply parameters of the first water supply unit are generated; If the water volume evaluation value b is within the preset second water volume evaluation value interval, the current adjustment cycle is set to the secondary water supply control mode; If the water volume evaluation value b is within the preset third water volume evaluation value interval, the current adjustment cycle is set to the third-level water supply control mode, and the water supply parameters of the second water supply unit are generated.

4. The technical water supply system of a hydropower station according to claim 3, characterized in that: The first control module is also used for: When the current regulation cycle is the secondary water supply control mode, obtain the technical water supply demand H in the current regulation cycle; Generate multiple primary water supply plans within the current regulation cycle according to the technical water supply demand h; Establish a primary water supply plan sequence F, F = (f1, f2...fm), where fi is the ith primary water supply plan; m is the number of primary water supply plans.

5. The technical water supply system of a hydropower station according to claim 4, characterized in that: The central control unit also includes: The second control module is used to sequentially set fi as the target primary water supply plan according to the primary water supply plan sequence F; Generate an operation evaluation value d of the target primary water supply plan according to a preset evaluation model; Among them, gi is the reference value of the i-th operation evaluation index, and βi is the influencing factor of the i-th operation evaluation index; Generate the operation evaluation value of each primary water supply plan in turn; The second control module is also used to establish an operation evaluation value sequence D, D = (d1, d2 ... dm), where di is the operation evaluation value of the i-th primary water supply plan; Set the primary water supply plan corresponding to the maximum operation evaluation value dmax in the operation evaluation value sequence D as the secondary water supply plan; Set the water supply parameters within the current regulation cycle according to the secondary water supply plan.

6. A control method for a technical water supply system of a hydropower station, applied to the control system of the technical water supply system of a hydropower station as claimed in any one of claims 1 to 5, characterized in that: include: Establish a water volume prediction model and generate a water volume prediction curve based on the water volume evaluation model; Establish multiple regulation cycles and generate water volume evaluation values ​​in each regulation cycle based on the water volume monitoring curve; The unit water supply control mode is set according to the water volume evaluation value, and the water supply plan within each adjustment cycle is set according to the unit water supply control mode.

7. The control method of the technical water supply system of a hydropower station according to claim 6, characterized in that: When generating the water volume evaluation value in each regulation cycle, it includes: According to the water volume prediction curve, the target sub-prediction curve corresponding to the current regulation period is intercepted; Establish multiple time intervals and generate water volume forecast reference values ​​for target sub-forecast curves in each time interval; Establish a water volume forecast reference value series A, A = (a1, a2...an), where ai is the water volume forecast reference value of the i-th time interval; n is the number of time intervals; Generate the water volume evaluation value b of the current regulation period according to the water volume prediction reference value series A; Among them, P is a correction coefficient set based on the credibility of the target sub-prediction curve; e1 is a preset first weight coefficient, e2 is a preset second weight coefficient; Q1 is a preset first fixed coefficient, and Q2 is a preset second fixed coefficient.

8. The control method of the technical water supply system of a hydropower station according to claim 7, characterized in that: When setting the unit water supply control mode according to the water volume evaluation value, it includes: Preset a first water volume evaluation value interval (B1, B2), a second water volume evaluation value interval (B2, B3) and a third water volume evaluation value interval (B3, B4); If the water volume evaluation value b is within the preset first water volume evaluation value interval, the current adjustment cycle is set to the first-level water supply control mode; If the water volume evaluation value b is within the preset second water volume evaluation value interval, the current adjustment cycle is set to the secondary water supply control mode; If the water volume evaluation value b is in the preset third water volume evaluation value interval, the current adjustment cycle is set to the third-level water supply control mode.

9. The control method of the technical water supply system of a hydropower station according to claim 6, characterized in that: The secondary water supply mode includes: Obtain the technical water supply demand H in the current regulation cycle; Generate multiple primary water supply plans within the current regulation cycle according to the technical water supply demand h; Establish a first-level water supply plan sequence F, F = (f1, f2...fm), where fi is the i-th first-level water supply plan; m is the number of first-level water supply plans; Generate the operation evaluation value of each primary water supply plan in turn according to the preset evaluation model; Establish an operation evaluation value sequence D, D = (d1, d2 ... dm), where di is the operation evaluation value of the i-th primary water supply plan; Set the primary water supply plan corresponding to the maximum operation evaluation value dmax in the operation evaluation value sequence D as the secondary water supply plan; Set water supply parameters within the current regulation cycle according to the secondary water supply plan; The step of sequentially generating the operation evaluation values ​​of each primary water supply plan includes: According to the primary water supply plan sequence F, fi is set as the target primary water supply plan in sequence; Generate an operation evaluation value d of the target primary water supply plan according to a preset evaluation model; Among them, gi is the reference value of the i-th operation evaluation index, and βi is the influencing factor of the i-th operation evaluation index; The operation evaluation value of each primary water supply plan is generated in turn.

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