Method for determining corresponding electricity of water power station water discharge based on dynamic correction boundary condition

Abstract

The application discloses a kind of based on dynamic correction boundary condition's corresponding electric quantity determination method of hydropower station water rejection, first, the classification of water rejection is obtained by gate discharge calculation, and the priority of each type of water rejection is divided, and the dynamic correction boundary condition is calculated;Second, the calculation step is determined, and the boundary condition of each calculation of hydropower station is obtained according to monitoring calculation step signal;Finally, the amount of each type of water rejection and the amount of each type of water rejection and corresponding electric quantity of the whole day are calculated.Compared with prior art, the algorithm designed by considering the boundary condition set after the water rejection factors such as flood control and maintenance of hydropower station can help to more accurately calculate the effective water rejection, maintenance water rejection and flood control water rejection of power station, so as to obtain related electric quantity, lay certain data foundation for later load optimization distribution, improve energy utilization rate, and have popularization and application value.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydropower station operation, and particularly relates to a method for determining corresponding power of water abandonment of a hydropower station based on dynamic correction of boundary conditions. BACKGROUND

[0002] A hydropower station is composed of a hydraulic system, a mechanical system and an electric energy generation device, etc., and is a water conservancy hub project for realizing conversion of water energy into electric energy, and the sustainability of electric energy production requires uninterrupted utilization of water energy of the hydropower station. Through construction of a reservoir system of the hydropower station, the distribution of water resources in time and space is artificially adjusted and changed to realize sustainable utilization of water resources. In the hydropower station, the existing technology has a single setting of boundary conditions for calculation of maintenance water abandonment, effective water abandonment and flood control water abandonment, and most of the settings take unit reference flow as the boundary condition for calculation of effective water abandonment, and the calculated result often greatly deviates from the actual result.

[0003] The factors of maximum power of a power station unit should consider the actual maximum power generation of the unit under conditions of unit maintenance, defect treatment, line fault and excessive grid difference, and the theoretical maximum power of the unit cannot be taken as the boundary condition all the time. This leads to inaccurate supervision data of the hydropower station, and further cannot better regulate and control energy utilization rate, and therefore, there is room for improvement. SUMMARY

[0004] The present application aims to provide a method for determining corresponding power of water abandonment of a hydropower station based on dynamic correction of boundary conditions. The present application relates to calculation of effective water abandonment, flood control water abandonment and maintenance water abandonment of a hydropower station, and plays a role of data support for reasonable allocation of load.

[0005] To achieve the above-mentioned purpose, the present application is implemented according to the following technical scheme:

[0006] The present application comprises the following steps:

[0007] S1: obtain water abandonment quantity classification through gate discharge calculation, divide priorities of various types of water abandonment, and calculate dynamic correction boundary conditions;

[0008] S2: determine a calculation step, and obtain boundary conditions of the hydropower station for each calculation according to a monitoring calculation step signal;

[0009] S3: calculate single-type water abandonment quantity, total daily water abandonment quantity and corresponding power.

[0010] The present application has the following beneficial effects:

[0011] This invention is a method for determining the corresponding electricity generated by water discharge from hydropower stations based on dynamically modified boundary conditions. Compared with existing technologies, the algorithm designed by considering the boundary conditions set after considering water discharge factors such as flood control and maintenance of hydropower stations can help to more accurately calculate the effective water discharge, maintenance water discharge, and flood control water discharge of power stations, thereby obtaining the relevant electricity. This lays a certain data foundation for subsequent load optimization and allocation, improves energy utilization, and has the value of widespread application. Detailed Implementation

[0012] The present invention will be further described below with reference to specific embodiments. The illustrative embodiments and descriptions herein are used to explain the present invention, but are not intended to limit the present invention.

[0013] This invention includes the following steps:

[0014] S1: The water discharge volume is classified by the gate discharge calculation, the priority of each type of water discharge is determined, and the dynamic correction boundary conditions are calculated.

[0015] S2: Determine the calculation step size and obtain the boundary conditions for each calculation of the hydropower station based on the monitoring calculation step size signal;

[0016] S3: Calculate the amount of water wasted in a single instance and the total amount of water wasted throughout the day, along with the corresponding electricity consumption.

[0017] Step S1 specifically involves:

[0018] S1.1: Classification of water discharge volume obtained through gate discharge calculation:

[0019] If the discharge from the sluice gate includes wastewater from environmental protection projects, then:

[0020] Formula 1

[0021] If the gate does not include the amount of water discharged for environmental protection, then:

[0022] Formula 2

[0023] S1.2: Priority classification of various types of wastewater:

[0024] , , , 4 water cups of a certain capacity, For a pot of water, the order in which it is filled is as follows: , , ,

[0025] Sure , , , Each person's water cup capacity , , , , then Statistical classification;

[0026] When the capacity of a water cup is 0, the amount of water wasted is recorded as 0. For example... =0, then =0.

[0027] In summary, Formula 1 and Formula 2 are unified as follows:

[0028] Formula 3

[0029] S1.3: Calculated dynamic modified boundary conditions:

[0030] The above , , , These are the boundary conditions for various types of water discharge; considering the actual situation, specifically for a particular power station:

[0031] There are only two fixed values: if there is no need to distribute the ecosystem downwards, then... The ecosystem needs to be decentralized. It depends on whether the released ecological flow is included in the gate discharge statistics;

[0032] This is a dynamic value: it depends on the maximum power generation capacity of Power Station A under specific conditions (such as unit maintenance, line maintenance, temporary defect elimination, shutdown for peak shaving, grid difference, head, etc.).

[0033] This is a dynamic value: the limited power generation capacity depends on the specific circumstances of Power Station A (e.g., unit maintenance, line maintenance, temporary maintenance).

[0034] Step S2 specifically involves:

[0035] S2.1: Fixed calculation step size: Let The calculation step is in minutes, with 0:00 as the start time and 24:00 as the end time each day. The number of calculations per day is recorded.

[0036] Formula 4

[0037] Advantages: Simple logic, suitable for rough estimation.

[0038] Disadvantages: Ignored The actual changes in gate opening and boundary conditions within a given time period, in the next... New gate openings and boundary conditions are only activated during specific time periods. Timed monitoring is required. The relevant signals are sent up during the time period to correct the gate opening and boundary conditions. The choice of time period determines the accuracy of the calculation and the frequency of boundary condition correction. The time period can be longer than 60.

[0039] S2.2: Trigger Calculation Step Size: Record relevant initial states, using either the gate action signal or the boundary condition change signal as the trigger condition to calculate the previous time period. The calculation starts at 0:00 and ends at 24:00 each day, and the number of calculations per day is recorded.

[0040] Formula 5

[0041] Advantages: The logic is relatively complex, but the calculations are precise.

[0042] Disadvantages: It requires real-time monitoring and transmission of relevant signals to correct the gate opening and boundary conditions.

[0043] S2.3: Based on the monitoring of the above-mentioned relevant signals, obtain the boundary conditions for each calculation of Power Plant A. , , , ,in, It is usually a fixed value. This represents the boundary conditions corresponding to the effective water discharge of Power Station A during the i-th calculation, i.e., the maximum power generation of Power Station A within the i-th calculation period; This represents the boundary conditions corresponding to the water discharge during the maintenance of Power Station A in the i-th calculation, i.e., the maximum power generation of Power Station A within the i-th calculation period; It is -1.

[0044] The specific steps of step S3 are as follows: calculate the total amount of water abandoned during the i-th time period, the amount of water abandoned for environmental protection, the amount of water abandoned for effective purposes, the amount of water abandoned for maintenance, and the amount of water abandoned for flood control.

[0045] Initial value: ; ; ; ; ;

[0046] S3.1: Total Water Discharge: Obtain relevant signals from the power station monitoring system, acquire the gate opening during the i-th calculation period, and calculate the total water discharge using the gate discharge formula.

[0047] S3.2: Environmental Protection Wastewater Volume: The environmental protection wastewater volume is a fixed value, i.e. During the i-th calculation period, if The time period calculation ends; if Continue with the calculation in S3.3;

[0048] S3.3: Effective water discharge: Obtain relevant signals from the power station monitoring system, acquire the power generation data during the i-th calculation period, and calculate the power generation of the power station. Considering the active power fluctuations due to over- or under-generation, a calculation dead zone of ±2MW is set, i.e. This dead zone only takes effect when determining whether there is any effective water disposal.

[0049] when ,but Continue with the calculation in S3.4;

[0050] when

[0051] like ,but = Continue calculating d;

[0052] like ,but = The time period calculation is complete;

[0053] in, Water consumption rate can be obtained by referring to a table;

[0054] S3.4: Maintenance wastewater volume:

[0055] like ,but = Continue with the calculation in S3.5;

[0056] like ,but = The time period calculation is complete;

[0057] S3.5: Flood control water discharge:

[0058] like , The time period calculation is complete;

[0059] S3.6: Calculate the total daily water wastage, environmental protection water wastage, effective water wastage, maintenance water wastage, flood control water wastage, and the corresponding electricity consumption:

[0060] ; ; ; ; ;

[0061] The corresponding battery level is: ; ; ; ;

[0062] The technical solutions of the present invention are not limited to the specific embodiments described above. Any technical modifications made in accordance with the technical solutions of the present invention fall within the protection scope of the present invention.

Claims

1. A method for determining the corresponding electricity generation from water discharge at a hydropower station based on dynamically modified boundary conditions, characterized in that, Includes the following steps: S1: The water discharge volume is classified by the gate discharge calculation, the priority of each type of water discharge is determined, and the dynamic correction boundary conditions are calculated. S2: Determine the calculation step size and obtain the boundary conditions for each calculation of the hydropower station based on the monitoring calculation step size signal; S3: Calculate the amount of water abandoned in a single instance and the total amount of water abandoned throughout the day, as well as the corresponding electricity consumption. Specifically, calculate the total amount of water abandoned, environmental protection water abandoned, effective water abandoned, maintenance water abandoned, and flood control water abandoned within the i-th time period. Initial value: ; ; ; ; ; S3.1: Total Water Discharge: Obtain relevant monitoring signals from the power station, acquire the gate opening during the i-th calculation period, and calculate the total water discharge using the gate discharge formula. S3.2: Environmental Protection Wastewater Volume: The environmental protection wastewater volume is a fixed value, i.e. During the i-th calculation period, if The time period calculation ends; if Continue with step S3.3 for calculation; S3.3: Effective water discharge: Obtain relevant monitoring signals from the power station, acquire the power generation data during the i-th calculation period, and calculate the power generation of the power station. Considering the active power fluctuations due to over- or under-generation, a calculation dead zone of ±2MW is set, i.e. This dead zone only takes effect when determining whether there is any effective water disposal. when ,but Continue with step S3.4 for calculation; when like ,but = Continue with step 3.4 for calculation; like ,but = The time period calculation is complete; in, Water consumption rate can be obtained by referring to a table; S3.4: Maintenance wastewater volume: like ,but = Continue with step S3.5 for calculation; like ,but = The time period calculation is complete; S3.5: Flood control water discharge: like , The time period calculation is complete; S3.6: Calculate the total daily water wastage, environmental protection water wastage, effective water wastage, maintenance water wastage, flood control water wastage, and the corresponding electricity consumption: ； ； ； ； ； The corresponding battery level is: ; ; ; ; ; in, It is usually a fixed value. This represents the boundary conditions corresponding to the effective water discharge of Power Station A during the i-th calculation, i.e., the maximum power generation of Power Station A within the i-th calculation period; This represents the boundary conditions corresponding to the water discharge during the maintenance of Power Station A in the i-th calculation, i.e., the maximum power generation of Power Station A within the i-th calculation period; It is -1.

2. The method for determining the corresponding electricity generation of hydropower station water discharge based on dynamically modified boundary conditions according to claim 1, characterized in that: Step S1 specifically involves: S1.1: Classification of water discharge volume obtained through gate discharge calculation: If the discharge from the sluice gate includes wastewater from environmental protection projects, then: Official 1 If the gate does not include the amount of water discharged for environmental protection, then: Official 2 S1.2: Priority classification of various types of wastewater: , , , 4 water cups of a certain capacity, For a pot of water, the order in which it is filled is as follows: , , , ; Sure , , , Each person's water cup capacity , , , , then Statistical classification; S1.3: Calculated dynamic modified boundary conditions: The above , , , These are the boundary conditions for various types of wastewater disposal; There are only two fixed values: if there is no need to distribute the ecosystem downwards, then... The ecosystem needs to be decentralized. It depends on whether the released ecological flow is included in the gate discharge statistics; This is a dynamic value: it depends on the maximum power generation capacity of power plant A under specific conditions; This is a dynamic value: it depends on the limited power generation capacity of power plant A under specific circumstances.

3. The method for determining the corresponding electricity generation of hydropower station water discharge based on dynamically modified boundary conditions according to claim 1, characterized in that: Step S2 specifically involves: S2.1: Fixed calculation step size: Let The time period is the calculation step size, in minutes. The calculation starts at 0:00 and ends at 24:00 each day, and the number of calculations per day is recorded. Official 4 S2.2: Trigger Calculation Step Size: Record relevant initial states, using either the gate action signal or the boundary condition change signal as the trigger condition to calculate the previous time period. The calculation starts at 0:00 and ends at 24:00 each day, and the number of calculations per day is recorded. Official 5 S2.3: Based on the monitoring signals, obtain the boundary conditions for each calculation of Power Plant A. , , , .

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