System for adjusting the pumping capacity of pumped storage plants

Abstract

A system for adjusting the pumping power of pumped-storage power plants, characterized in that it comprises a power acquisition unit, a sensor group, an assessment module, a monitoring system, and a speed control system; wherein the power acquisition unit is connected to the monitoring system of the computer to acquire the power to be adsorbed Psuction ordered by the network planning office, and to determine the total number m of pumping stations according to the ratio between the pumping power of the station and the power to be adsorbed, so that the power generation capacity of the station can be determined according to the ratio between the total number m of pumping stations, the pumping power PPump, and the power to be adsorbed Psuction, i.e. PGenerator = m * Ppump - Psuction, wherein the sensor group comprises a voltage and current sensor of the power plant's station, an ultrasonic flowmeter, a pressure sensor,and a water level sensor. Wherein the voltage and current sensor of the plant indicates that a voltage transformer and a current transformer are provided at the outlet of the power plant of the pumped storage plants, wherein the real-time voltage and the real-time current, respectively supplied by the voltage transformer and the current transformer, are used to calculate the actual power of the pumped storage plant; wherein the water level sensor detects the current water level of the power plant, and the ultrasonic flowmeter detects the flow rate of the plant; wherein the theoretical power is calculated according to the current water level and the flow rate of the power plant, respectively detected by the water level sensor and the ultrasonic flowmeter, and wherein the efficiency ηGenerator of the operating plant is calculated according to the actual power and the theoretical power; wherein the pressure sensor,which are electrically connected to the pumped storage power plant, detects the pressure at the inlet and outlet of the diversion pipe section, the diversion fork pipe section, the plant section, the underwater fork pipe section, and the underwater section, respectively. The pumped storage power plant calculation unit calculates the efficiency of each section according to the flow rate detected by the ultrasonic flowmeter and the position increment of the detected section, and calculates the overall efficiency by multiplying it. The assessment module assesses, in each case, according to the power generation power PGenerator of the plants calculated by the power detection unit, whether the safe and stable operating range of the plant has been exceeded, and whether hydraulic safety requirements for the transient state under the hydraulic short-circuit operating mode are met based on the calculated power generation power and pumping power.and whether the overall efficiency is greater than 75%. If the assessment results are all positive, the hydraulic short-circuit operation mode can be started, and a command to start the hydraulic short-circuit operation mode is issued to the monitoring system. The monitoring system issues a command to start the operation of the pumped storage power plant to the plant based on the number of pumping stations and the power generation capacity received from the power acquisition unit.and wherein the on-site control unit of the plant issues a command to open a ball valve and start an auxiliary system; wherein a speed controller, in accordance with the power command issued by the monitoring system, determines from the plant operating characteristic data the optimal guide vane opening for pumping operation at the current discharge head and the opening required for the power required by the power generation plant, gradually opening and adjusting to the required guide vane opening.

Description

TECHNICAL FIELDThe present invention relates to the technical field of pump storage, in particular to a system for adjusting the pump power of pump storage systems.PRIOR ARTPumped storage power plants are an important source for flexible adjustment in power grids. The traditional reversible fixed-speed, mixed-flow plant cannot adjust its power when operating as a pump, meaning that it can only take a fixed flow rate, which restricts the role of pumped storage power plants in the use of renewable energies in the new power system. There is an urgent need to employ new technologies to further improve the operational flexibility of pumped storage power plants.Presently accepted methods for improving pump condition flexibility include the use of variable speed and three equipment systems. Currently, variable speed plants are used in three power plants to achieve power adjustment of the pumping conditions. The Yangzhuoyong Lake surge tank uses the structure of a three device vertical system and the three device system can also be used for the operation of the hydraulic surge circuit, i.e., pumps and turbines are operated simultaneously, and the energy consumed by the pumps is compensated by the energy generated by the turbines when the surge conditions are operating, so that the originally non-adjustable surge conditions allow power adjustment to regulate the demand for the pumps of power from the power grid.However, the construction costs of both the three-device and variable-speed installations are much higher than those of the reversible fixed-speed installations, so that the pumping and storage installations built in China are exclusively reversible fixed-speed installations. Therefore, there is an urgent need for a method of adjusting the power for pumping conditions for reversible fixed speed installations.CONTENT OF THE PRESENT INVENTIONIn view of the prior art, the present invention provides a system for adjusting the pumping capacity of pumped storage systems to solve the problem that the capacity of a conventional reversible mixed flow system is not adjustable in the absorption flow network.The present invention relates to a system for adjusting the pumping power of pumped storage systems, comprising a power detection unit, a sensor group, a judgment module, a monitoring system and a speed control system;wherein the power acquisition unit is connected to the monitoring system of the computer to acquire the power P saugen to be adsorbed arranged by the network planning site and to determine the total number m of the pumping facilities according to the ratio between the pumping performance of the facility and the power to be adsorbed, so that the power generation performance of the facility can be determined according to the ratio between the total number m of the pumping facilities, the pumping performance P Pump and the power P saugen to be adsorbed, i.e., P Generator= m*P pumpen- P saugen,wherein the sensor group comprises a power plant voltage and current sensor, an ultrasonic flowmeter, a pressure sensor, and a water level sensor, etc.wherein the power and current sensor of the plant indicates that a voltage converter and a current converter are provided at the outlet of the power plant of the pumped storage plants, wherein the real-time voltage and the real-time current supplied by the voltage converter and the current converter, respectively, are used for calculating the actual power of the pumped storage plant; wherein the water level sensor detects the actual water level of the power plant and the ultrasonic flow meter detects the flow rate of the plant; wherein the theoretical power is calculated according to the actual water level and the flow rate of the power plant, respectively, detected by the water level sensor and the ultrasonic flow meter, and wherein the efficiency η Generator of the operating plant is calculated according to the actual power and the theoretical power;wherein the pressure sensor electrically connected to the pump storage equipment detects the pressure at the inlet and the outlet of the bypass pipe portion, the bypass pipe portion, the equipment portion, the subsea pipe portion, and the subsea portion, respectively, wherein the calculation unit of the pump storage equipment calculates the efficiency of each portion according to the flow rate detected by the ultrasonic flow meter and the position increase of the detected cut calculates the overall efficiency by multiplication;wherein the judging module judges whether the safe and stable operating range of the plant is exceeded, whether hydraulic safety requirements for the transient state under the hydraulic short-circuit operating mode are satisfied based on the calculated power generation power and pump power, respectively, according to the power generation power P Generator of the plants calculated by the power detecting unit, and whether the overall efficiency is greater than 75%, wherein, if the judgment results are all positive, the hydraulic short-circuit operating mode may be started, and wherein a command for starting the hydraulic short-circuit operating mode is issued to the monitoring system.wherein the monitoring system outputs a command to start the operation of the pump storage system to the system based on the number of pump systems and the power generation power received from the power detection unit, and wherein the on-site control unit of the system outputs a command to open a ball valve and start an auxiliary system;wherein a speed controller determines the optimal vane opening for the pumping operation at the current delivery head and the opening required for the power required by the power generation system from the data of the plant operating characteristic according to the power command output by the monitoring system, gradually opening and adjusting to the required vane opening.BRIEF DESCRIPTION OF THE DRAWINGSIn order to more clearly illustrate the technical solutions of the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly described below. It goes without saying that the attached drawings in the following description are only some of the embodiments of the present invention, and other attached drawings can be made without any creative work by those skilled in the art based on these drawings. FIG. 1 is a flow chart of a method for adjusting power for pumping conditions of pumped storage systems according to an exemplary embodiment of the present invention; FIG. 2 shows a schematic illustration of the water flow during the operation of a pumped storage power plant having a pipe and two devices in the power generation operating mode according to an exemplary embodiment of the present invention; FIG. 3 shows a schematic illustration of the water flow during the operation of a pumped storage power plant having a pipe and two devices in the operating mode with hydraulic short circuit according to an exemplary embodiment of the present invention; FIG. 4 shows a schematic illustration of the water flow during the operation of a pumped storage power plant having a pipe and two devices in the pumping operating mode according to an exemplary embodiment of the present invention; FIG. 5 is a schematic illustration of region partitioning according to an embodiment of the present invention; FIG. 6 is a flow chart of a method for adjusting power for pumping conditions of pumped storage systems according to another exemplary embodiment of the present invention; FIG. 7 is a structural block diagram of a power adjusting apparatus for pumping conditions of pumped storage facilities according to an embodiment of the present invention; FIG. 8 is a schematic diagram showing a hardware structure of a computer device according to an embodiment of the present invention.DETAILED EMBODIMENTSIn order to clarify the purposes, the technical solutions, and the advantages of the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be described clearly and fully hereinafter in conjunction with the appended drawings in the embodiments of the present invention, and it is apparent that the described embodiments are a part of the embodiments of the present invention, not all the embodiments. Starting from the embodiments of the present invention, all other embodiments achieved by a person skilled in the art without any creative work fall within the scope of protection of the present invention.In accordance with embodiments of the present invention, there is provided an embodiment of a method of conditioning the pumping performance of a pumped storage facility, it being understood that the steps illustrated in the flowchart of the appended drawings may be performed in a computer system such as a set of computer executable instructions, and that although a logical sequence is illustrated in the flowchart, the illustrated or described steps may in some cases be performed in a different order than that illustrated or described herein.The embodiment provides a method for adjusting the power of pumping conditions of pumped storage facilities applicable to a reversible pumped storage facility at a fixed speed. Figure is a flow diagram of a method for power adjustment for pump conditions of pump storage systems according to an embodiment of the present invention. As shown in FIG. 1, the method comprises the following steps:Step S 101: Acquisition of a power to be adsorbed; in particular, the power to be adsorbed may be the power to be absorbed arranged by the network planning site. In order to ensure that the power grid can deliver power securely and stably, i.e. that the voltages at the voltage turning points of the power grid are kept at a certain level, the grid planning point must plan the power according to the load requirement of the power grid and the power generation capacity of the power plants. Planning includes outputting excess power from the power grid and supplying external power when power generation cannot meet the load demand. The surplus power in the power grid is output from the grid planning facility as power to be adsorbed to installations which are capable of absorbing and converting this power in order to achieve effective utilization of the power to be adsorbed.Step S 102: Determining a power generation performance of a plant according to the relationship between a pumping performance of the pumping plant and the performance to be adsorbed; in particular, a pumped storage power plant is a water power plant that uses electric energy to pump water into the upper water storage during the bottom of the electric load, and then releases water into the lower water storage to generate power during the peak of the electric load. Thus, the pumping power is the power at which the water is pumped into the upper water reservoir, and the power generation power of the power plant is the power at which the water is discharged into the lower water reservoir to generate power. After the power to be adsorbed is detected, it may be judged whether the pumping power can be satisfied based on the power to be adsorbed, and then the power generation performance, i.e., the power generation performance of the plant is determined based on the relationship between the pumping power and the power to be adsorbed.Step S 103: calculating an overall efficiency of a pumped storage power plant in a hydraulic short-circuit operation mode when the power generation performance of the plant and corresponding operation parameters of the plant satisfy predetermined requirements, the hydraulic short-circuit operation mode being a mode with the simultaneous operation of the plant for power generation and water pumping; in particular, after the determination of the power generation performance of the plant, it may be determined whether the power generation performance of the plant satisfies a predetermined requirement such as a plant operation requirement, and when it is satisfied, it is determined that the operation parameter of the plant satisfies the power generation performance of the plant, i.e., it is possible to realize the corresponding power generation performance when the operation parameter of the plant is applied. After determining the operating parameters of the plant, it is judged whether the operating parameters of the plant meet the predetermined requirements, if the operating parameters of the plant also meet the predetermined requirements, then the overall efficiency of the pumped storage power plant in the hydraulic short-circuit operating mode is calculated. The pumped storage power plant may be a single-pipe, multi-equipment type power plant, for example, a single-pipe, two-equipment type power plant. A hydraulic short-circuit operation mode is used, i.e., the pumping plant is used for water pumping to consume the power to be adsorbed and simultaneously generates power corresponding to the determined power generation performance of the plant. The overall efficiency includes power generation, pumping, and efficiency of the piping when the plant is operating. As shown in FIGS. 2 to 4, a schematic representation of the water flow during the operation of a pumped storage power plant with a pipe and two devices is in the power generation operating mode, hydraulic short-circuit operating mode and pumping operating mode.Step S 104: Controlling the equipment to operate in the hydraulic short-circuit mode according to the operating parameters of the equipment when the overall efficiency satisfies the predetermined requirements. In particular, when the overall efficiency satisfies the predetermined requirements, which indicates that the use of the hydraulic short-circuit operation mode can make the power plant safe and stable operation, and at the same time can satisfy the respective advantages and other requirements, at which time based on the determination of the operation parameters of the plant to control the operation of the plant to realize the adjustment of the power of the power grid.The method for adjusting the output for pumping conditions of pumped storage facilities according to embodiments of the present invention includes the steps of: determining a power generation output of a facility according to the relationship between a pumping output of the pumped facility and the output to be adsorbed; calculating a total efficiency of a pumped storage power plant in a hydraulic short-circuit operation mode when the power generation output of the facility and corresponding operation parameters of the facility meet predetermined requirements; controlling the facility to operate in the hydraulic short-circuit mode according to the operation parameters of the facility when the total efficiency meets the predetermined requirements. In this way, the method of power adjustment may achieve the adjustment of the grid power by using a hydraulic short-circuit mode of operation that may more flexibly and quickly balance out disturbances caused by intermittent integration of clean energies into the grid. The method can also solve the problem in the prior art that the reversible installation with two devices cannot perform any power adjustment during the pumping operation. At the same time, the operating conditions for starting the hydraulic short-circuit operating mode must ensure that the power generation performance of the plant and the corresponding operating parameters of the plant meet the predetermined requirements and that the overall efficiency meets the predetermined requirements, thus ensuring safe and stable operation of the plant.The embodiment provides a method for adjusting power for pumping conditions of pumped storage systems, comprising the following steps:Step S 201: Detection of a power to be adsorbed; further details which are not repeated here can be gathered from the exemplary embodiment illustrated in FIG. 1 in step S 101.Step S 202: determining a power generation performance of a plant according to the relationship between a pumping performance of the pumping plant and the performance to be adsorbed;In particular, the above step S 202 comprises:Step S 2021: Judging the power generation performance of a single plant and the power to be adsorbed; in particular, after detecting the power to be absorbed, i.e., the power to be adsorbed indicated by the power grid, first, the power and the pumping performance of the single pumping plant may be judged, i.e., it may be judged whether the power is sufficient for the operation of the single pumping plant.Step S 2022: Determining the power generation performance of the plant according to the difference between the pump performance of the single pump plant and the power to be adsorbed when the pump performance of the single pump plant is larger than the power to be adsorbed; in particular, when the pump performance of a single pump plant is larger than the power to be absorbed, this means that the power to be absorbed is unable to satisfy the pump operation of the single pump plant. At this time, it is possible to operate only a single pumping apparatus and to form a difference between the pumping capacity of the single pumping apparatus and the power to be absorbed to determine the power generation capacity of the apparatus.Step S 2023: determining a total number of the pumping apparatuses to be operated by rounding up the quotient of the power to be adsorbed and the pumping power of the individual pumping apparatus if the pumping power of the individual pumping apparatus is less than or equal to the power to be adsorbed; In particular, when the pumping power of the single pumping facility is equal to or lower than the power to be absorbed, this means that the power to be absorbed can satisfy the pumping power of the single pumping facility, and at this time, it is necessary to determine how many pumping facilities can be operated with the power to be absorbed after the pumping power of the single pumping facility is satisfied, therefore, the rounding function can be used to round the relationship between the power to be absorbed and the pumping power of the single pumping facility to determine how many pumping facilities can be supplied with the power to be absorbed, i.e., to determine the number of pumping facilities to be operated.Step S 2024: Determine the power generation performance of the plant according to the difference between the product of the number of pumping plants and the pumping performance of the single pumping plant and the power to be adsorbed. In particular, after determining the number m of pumping installations to be operated, the power generation output P Generator can be determined on the basis of P Generator= m* P pumpen- P saugen where P pumpen represents the pumping output of the individual pumping installation and P saugen represents the output to be absorbed.Step S 203: calculating a total efficiency of a pumped storage power plant in a hydraulic short-circuit operation mode when the power generation performance of the plant and corresponding operation parameters of the plant meet predetermined requirements, wherein the hydraulic short-circuit operation mode is a mode with the simultaneous operation of the plant for power generation and water pumping;In particular, the above step S 203 comprises:Step S 2031: Judging whether the power generation performance of the plant is within the range of the stable operation performance of the plant; specifically, the stable operation performance range of the plant may be determined based on the relevant operation conditions of the pumped storage power plant.Step S 2032: Determining plant operation parameters corresponding to the plant power generation performance according to a plant operation characteristic when the plant power generation performance is in the range of the stable plant operation performance; in particular, the plant operation characteristic is an equivalent curve of turbine efficiency, suction head, vane opening, blade angle, pressure pulsation, etc. indicated in a coordinate system with output power and delivery head as coordinates, therefore, after determining the plant power generation performance, the current delivery head of the pumped storage power plant can be determined, and based on the current delivery head and the plant power generation performance, the plant operation parameters can be determined on the curve, and the plant operation parameters include, in particular, the vane opening and the plant operation efficiency, and the like.Step S 2033: Calculating the overall efficiency of the pumped storage power plant when the pumped storage power plant is in the hydraulic short-circuit operating mode when the operating parameters of the plant meet the predetermined requirements.In an optional embodiment, the above step S 2033 comprises:Step a 1: Creating a simulated transient state calculation model of a power plant; in particular, simulated transient state software may be used in the prior art to create a simulated transient state calculation model. In creating the model, relevant parameters may be input to the simulated transient state software to create the model. In this embodiment, for example, the parameters of the hydraulic system model of the power plant and the parameters of the plant are input to the software to build a model.Step a 2: calculating an extreme value operating condition corresponding to a predetermined threshold value for the transient state parameters based on the simulated transient state calculation model of the power plant; in particular, in creating the simulated transient state calculation model, six predetermined transient state thresholds, namely, the maximum pressure at the inlet of the scroll casing of the power plant, the minimum pressure at the inlet of the subsea pipe, the maximum speed of the plant, the maximum water level of the control well, the maximum water level of the slide well, and the minimum pressure along the water piping system, may be input to the model to execute the simulated transient state calculation and determine the extreme value operating conditions of the six transient state parameters during the transient operation.Step a3: Executing simulated transient state calculation based on the simulated transient state calculation model of the power plant and corresponding to the extreme operating condition and the operating parameters of the plant, determining an extreme value corresponding to the operating condition; Specifically, based on the created simulated transient state calculation model of the power plant, the simulated transient state calculation based on the determined extreme operating conditions, the operating parameters of the plant such as the power generation performance of the plant, the vane opening, and the rated rotational speed of the plant, etc. may be performed to determine the extreme value corresponding to each operating condition.Step a4: Calculate the overall efficiency of the pumped storage power plant when it is in the hydraulic short-circuit operating mode when the extreme value corresponding to the operating condition satisfies a threshold range corresponding to a predetermined threshold for the steady state parameters. Specifically, the extreme values corresponding to the determined operating conditions are compared with the six predetermined threshold values for the transient state parameters, and if they are within the threshold ranges corresponding to the six predetermined threshold values for the transient state parameters, the transient operation is considered safe and the overall efficiency can be calculated; and if they are no longer within the threshold ranges, the starting operation for the hydraulic short-circuit operating mode is terminated. Here, the threshold range including the threshold for the parameter may be determined according to the actual situation, e.g. if the threshold for the parameter includes the maximum value of a parameter, then its corresponding threshold range is a range smaller than the maximum value; if the threshold for the parameter includes the maximum value and the minimum value of a parameter, then its corresponding threshold range is a range between the minimum value and the maximum value.The overall efficiency can be calculated from the following steps:Step bl: Dividing the hydraulic piping of the power plant into a bypass pipe section, a bypass fork pipe section, a plant section, an underwater fork pipe section, and an underwater section; Specifically, in the calculation of the total efficiency, the power plant may be divided into regions and the efficiency of each region may be calculated to finally obtain the total efficiency, which may make the calculated total efficiency more accurate. As illustrated in FIG. 5, in this embodiment, a total of five regions, namely, a bypass pipe portion, a bypass fork pipe portion, a facility portion, an underwater fork pipe portion, and an underwater portion, are obtained by the division into regions.Step b2: calculating a first efficiency of the bypass pipe section, a second efficiency of the bypass pipe section, a third efficiency of the power generation of the plant, a fourth efficiency of the subsea fork pipe section, a fifth efficiency of the subsea section and a sixth efficiency of the pumping plant based on the simulated calculation model for the transient state of the power plant;In particular, the first efficiency η DRL for the bypass pipe section is calculated according to the following formula:Similarly, the second efficiency η Umleistungsgabel of the bypass pipe section, the fourth efficiency ηUnterwasser of the subsea pipe section, and the fifth efficiency TJ un t erwasser of the subsea section can be calculated.The plant section efficiency should be calculated by including the input and output power, and the third plant power generation efficiency η is GeneratorThe sixth efficiency A 6 of the pumping installation can be calculated in the same way.In the above formula, P 1, P 2 are the total pressure at the inlet and outlet of the bypass pipe section, Z 1, Z 2 are the inlet and outlet height of the bypass pipe section; P 3, P 4 are the total pressure at the inlet and outlet of the power plant, Q is the flow rate of the power plant; η DRL, ηGenerator is the efficiency of the bypass pipe section and the power plant, ρ is the density of the water, g is the gravitational acceleration, H is the current delivery height of the power plant.It should be noted that the parameters used for the calculation of the efficiency, such as the total pressure at the inlet and outlet, the height and the flow rate, can be acquired by a simulated calculation for the transient state using the generated simulated calculation model for the transient state of the power plant.Step b 3: Determine the overall efficiency in the hydraulic short-circuit operation mode based on the product of the first efficiency, the second efficiency, the third efficiency, the fourth efficiency, the fifth efficiency, and the fifth efficiency.The overall efficiency η is calculated from the following formula:Step S 204: controlling the equipment to operate in the hydraulic short-circuit mode according to the operating parameters of the equipment when the overall efficiency satisfies the predetermined requirements. Further details which are not repeated here can be gathered in step S 104 from the exemplary embodiment illustrated in FIG. 1.The embodiment provides a method for adjusting power for pumping conditions of pumped storage systems, comprising the following steps:Step S 301: Detection of a power to be adsorbed; further details which are not repeated here can be gathered from the exemplary embodiment illustrated in FIG. 1 in step S 101.Step S 302: Determining a power generation output of a plant according to the ratio between a pump output of the pump plant and the output to be adsorbed; further details, which are not repeated here, can be gathered from the exemplary embodiment illustrated in FIG. 1 in step S 102.Step S 303: calculating an overall efficiency of a pumped storage power plant in a hydraulic short-circuit operation mode when the power generation performance of the plant and corresponding operation parameters of the plant meet predetermined requirements, the hydraulic short-circuit operation mode being a mode with simultaneous operation of the plant for power generation and water pumping; further details not repeated here can be found in the embodiment illustrated in FIG. 1 in step S 103.Step S 304: controlling the equipment to operate in the hydraulic short-circuit mode according to the operating parameters of the equipment when the overall efficiency satisfies the predetermined requirements. In particular, the predetermined requirement comprises a threshold value for the total efficiency, e.g. 75%, i.e. if the total efficiency is greater than 75%, this means that the total efficiency meets the predetermined requirement. In controlling the operation of the equipment according to the operating parameters of the equipment, a ball valve may be opened before each equipment to start the operation of the equipment, and the vane opening may be stepwise adjusted to the vane opening a 0 in the operating parameters of the equipment by the speed controller of the equipment.Step S 305: monitoring a plant operating stability parameter in real time during the operation of the plant; terminating the hydraulic short-circuit operation mode and triggering an alarm if the plant operating stability parameter does not meet a predetermined requirement. In particular, after starting the hydraulic short-circuit operating mode, the operating operation of the plant may be monitored in real time to determine whether the relevant parameters for the operating stability during the operating operation meet the predetermined requirements, so that it may be determined whether the hydraulic short-circuit operating mode is stable. For example, an operating limit may be set and the real-time sensed relevant plant operating stability parameters may be compared to the operating limit, and if the operating limit is exceeded, the hydraulic short mode of operation may be terminated and an alarm may be triggered.Step S 306: monitoring an amplitude of the water level change in real time during operation of the plant; re-judging whether safety hydraulic requirements for the transient condition are met and whether the overall efficiency meets the predetermined requirements when the hydraulic system adopts the hydraulic short-circuit operating mode when the amplitude of the water level change is greater than a predetermined threshold value; and terminating the hydraulic short-circuit operating mode when the requirements are not met.In particular, after starting the hydraulic short-circuit operating mode, the amplitude of the water level change can also be monitored in real time, and if the amplitude of the water level change is greater than a predetermined threshold value, e.g. greater than 1 m, it is necessary to return to the judgment whether the hydraulic system using the hydraulic short-circuit operating mode satisfies the requirements for the safety of the hydrodynamic transient condition and whether the overall efficiency satisfies the predetermined requirements. Here, the judgment as to whether the hydraulic system using the hydraulic short-circuit operation mode satisfies the hydrodynamic transient state safety requirement may be made based on the above steps a1 to a4, and is not repeated here.As a concrete embodiment of an embodiment of the present invention, as shown in Fig. 6, the method for power adjustment for pumping conditions of pumped storage facilities can be realized using the following steps:Step 1: Prepare a simulated calculation model for the transient state of a power plant (or referred to as a simulated analysis model for the transient state of a power plant) and determine the extreme value operating conditions.1.1 creating the simulated power plant transient state calculation model according to the parameters for the hydraulic system model and the plant parameter model, and inputting the threshold values of six transient state parameters, namely the maximum pressure at the inlet of the scroll casing, the minimum pressure at the inlet of the subsea pipe, the maximum speed of the plant, the maximum water level of the control duct, the maximum water level of the slide duct and the minimum pressure along the transmission system in the water pipe system.1.2 calculating the extreme operating conditions of the power plant. executing a series of simulated transient state calculations using the simulated transient state calculation model of the power plant to determine and then store the extreme operating conditions of the six transient state parameters.Step 2: The power plant receives the power P to be adsorbed saugen, which is output from the network planning site.Step 3: The monitoring system of the power plant judges the number of pumping plants to be operated.3.1 The power P saugen is compared with that of a pumping power P pumpen of the individual installation, and if the ratio of the two is less than 1, i.e. P saugen / P pumpen<1, then it directly enters the method for establishing the hydraulic short circuit.3.2 If the ratio of the two is equal to or greater than 1, i.e., P saugen / P pumpen >1, then the necessity of starting a number of pumping plants is judged by the rounding function CEILING, if CEILING (P saugen / P pumpen,1) = m, then the pumping plants are started with m plants.3.3 This is incorporated into the method for establishing the hydraulic short circuit.Step 4: Calculation of the equipment power generation capacity required for the hydraulic short-circuit operation mode.4.1 The power required for the power generation operation is calculated as follows: After rounding off the number of pumping installations to be started by multiplying the pumping power and subsequent subtraction of the power to be absorbed, the remaining power is obtained, i.e. P Generator= m* P saugen- P pumpen.4.2 Based on the current delivery head H of the power plant and the calculated power P Generator of the plant, it is judged whether the safe and stable operating range of the plant is exceeded. When the power generation output P Generator is within the safe operation range of the plant, the vane opening of the power plant a 0 and the operation efficiency η Generator of the plant are checked from the plant operation characteristic.Step 5: Judgment of safety for the transient state of the hydraulic system in the hydraulic short circuit operation.5.1 executing the simulated calculation for the transient state based on the extreme value operating conditions determined in step 1 and the plant parameters P Generato, a 0 calculated in step 4 and the rated rotational speed n of the plant.5.2 judging the certainty for the transient state when the current parameters are used for the hydraulic short circuit operation of the power plant. comparing the calculated extreme values according to each operating condition with the predetermined threshold values of the six transient state parameters. If all values are within the threshold range, the transient is deemed safe and the next step may be performed.5.3 When the safety for the transient state of the power plant is not satisfied, the hydraulic short-circuit starting operation is ended.Step 6: Judge the efficiency of the hydraulic short circuit operation.6.1 calculating the piping losses of the hydraulic system and the operating efficiency of the plant according to the region. As shown in FIG. 2, the entire system may be divided into five regions according to simulated transient state calculations to detect the total pressure, flow rate, and height at the inlet and outlet of each region to calculate the energy of the regional boundaries, the piping system corresponding to the regional inlet and outlet of the energy difference to obtain the efficiency.For example, the efficiency of the bypass pipe section is:Similarly, the efficiency η Umleistungsgabel of the bypass pipe section, the efficiency ηUnterwasser of the subsea pipe section, and the efficiency η Unterwasser of the subsea section can be calculated.The plant section efficiency should be calculated by including input and output power, and the plant power generation efficiency is:The efficiency η pumpen of the pumping installation can be calculated in the same way.In the above formula, P 1, P 2 are the total pressure at the inlet and outlet of the bypass pipe section, Z 1, Z 2 are the inlet and outlet height of the bypass pipe section; P 3, P 4 are the total pressure at the inlet and outlet of the power plant, Q is the flow rate of the power plant; η bypass, η Generator are the efficiency of the bypass pipe section and the power plant, ρ is the density of water, g is the acceleration of gravity.6.2 calculating the overall efficiency η of the system based on the losses of the individual regions.6.3 judging whether the efficiency η in the hydraulic short-circuit operation mode under the current operation condition is greater than 75%, and if greater than 75%, indicating a command to start the hydraulic short-circuit operation mode.Step 7: Receiving the command to start the hydraulic short-circuit operation mode of the facilities.opening the ball valves before each plant to start the operation of the plant and stepwise matching of the vane opening to the vane opening of the power plant a 0 in step 3 by the speed controller of the plant.7.2 The plant stability parameters are monitored in real time by the condition monitoring system to determine if the plant hydraulic short circuit operation is stable. If the parameter for the stability of the aggregate exceeds the limit value, the alarm is triggered and the operation is ended.Step 8: Execute the reliability judgment again when the amplitude of the change of the operating conditions exceeds a certain range.When the amplitude of water level change during operation reaches more than 1 m from the last judgment, the safety judgment and the efficiency judgment are returned to step 5 to ensure safety and efficiency of the power plant.In this exemplary embodiment, a device for adjusting the power for pumping conditions of pumped storage systems is also provided, with which the exemplary embodiments and preferred embodiments described above, which have already been described without further details, can be realized. As used herein, the term "module" may be a combination of software and / or hardware that implements a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, implementation in hardware or a combination of software and hardware is also possible and contemplated.The embodiment provides a pump storage equipment power adjusting apparatus applicable to a fixed speed reversible pump storage equipment as shown in Fig. 7, the apparatus comprising:a power detection module 71 for detecting a power to be adsorbed; a power generation determination module 72 for determining a power generation power of a plant according to a relationship between a pump power of the pump plant and the power to be adsorbed; a total efficiency calculation module 73 for calculating a total efficiency of a pump storage power plant in a hydraulic short-circuit operation mode when the power generation power of the plant and respective operation parameters of the plant meet predetermined requirements, wherein the hydraulic short-circuit operation mode is a simultaneous operation mode of the power generation plant and water pumping operation mode; an operation control module 74 for controlling the plant to operate in the hydraulic short-circuit mode according to the operation parameters of the plant when the total efficiency meets the predetermined requirements.In an optional embodiment, the power generation determination module is specifically configured to: judge the power generation performance of a single plant and the power to be adsorbed; determine the power generation performance of the plant according to the difference between the pump performance of the single pump plant and the power to be adsorbed when the pump performance of the single pump plant is larger than the power to be adsorbed; determine a total number of the pump plants to be operated by rounding up the quotient of the power to be adsorbed and the pump performance of the single pump plant when the pump performance of the single pump plant is less than or equal to the power to be adsorbed; determine the power generation performance of the plant according to the difference between the product of the number of the pump plants and the pump performance of the single pump plant and the power to be adsorbed.In an optional embodiment, the total efficiency calculation module includes: a judgment module for judging whether the power generation performance of the plant is within the stable operation performance range of the plant; a parameter determination module for determining the operation parameters of the plant corresponding to the power generation performance of the plant according to a plant operation characteristic when the power generation performance is within the stable operation performance range of the plant; a calculation submodule for calculating the total efficiency of the pumped storage power plant when the pumped storage power plant is in the hydraulic short-circuit operation mode when the operation parameters of the plant satisfy the predetermined requirements.In an optional embodiment, the calculation module includes: a model generation module that is to generate a simulated transient state calculation model of a power plant; an operating condition determination module that is to calculate an extreme value operating condition corresponding to a predetermined threshold value for the transient state parameters based on the simulated transient state calculation model of the power plant; an extreme value determination module that is to execute a simulated transient state calculation based on the simulated transient state calculation model of the power plant and corresponding to the extreme value operating condition and the operating parameters of the plant, and to determine an extreme value corresponding to the operating condition; a calculation submodule operable to calculate the overall efficiency of the pumped storage power plant when in the hydraulic short mode of operation when the extreme value corresponding to the operating condition satisfies a threshold range corresponding to a predetermined threshold for the steady state parameters.In an optional embodiment, the calculation submodule is used in particular to: calculate an overall efficiency of a pumped storage power plant in a hydraulic short-circuit operating mode by the following steps: dividing the hydraulic pipeline of the power plant into a bypass pipe section, a bypass fork pipe section, a plant section, an underwater fork pipe section and an underwater section; calculate a first efficiency of the bypass pipe section, a second efficiency of the bypass fork pipe section, a third efficiency of the power generation of the plant, a fourth efficiency of the underwater fork pipe section, a fifth efficiency of the underwater section and a sixth efficiency of the pumping plant on the basis of the simulated calculation model for the transient state of the power plant; determining the total efficiency in the hydraulic short-circuit mode of operation based on the product of the first efficiency, the second efficiency, the third efficiency, the fourth efficiency, the fifth efficiency, and the fifth efficiency.In an optional embodiment, the apparatus further comprises: a first monitoring module, which is for monitoring a parameter for the operating stability of the plant in real time during the operation of the plant, and for stopping the hydraulic short-circuit operating mode and triggering an alarm if the parameter for the operating stability of the plant does not meet a predetermined requirement.In an optional embodiment, the apparatus further comprises: a second monitoring module operable to monitor an amplitude of the water level change in real time during operation of the plant and to re-judge whether safety hydraulic requirements for the transient condition are met and whether the overall efficiency meets the predetermined requirements when the hydraulic system adopts the hydraulic short-circuit operating mode when the amplitude of the water level change is greater than a predetermined threshold, and to terminate the hydraulic short-circuit operating mode when the requirements are not met.Further functional descriptions of the above modules are the same as in the above-described embodiments and will not be repeated here.The embodiments of the present invention also provide a computer device comprising a device for adjusting the power of pumping conditions of pumped storage systems according to Fig. 7.The present invention further relates to a system for adjusting the pumping power of pumped storage systems, comprising a power detection unit, a sensor group, a judgment module, a monitoring system and a speed control system;wherein the power acquisition unit is connected to the monitoring system of the computer to acquire the power P saugen to be adsorbed arranged by the network planning site and to determine the total number m of the pumping facilities according to the ratio between the pumping performance of the facility and the power to be adsorbed, so that the power generation performance of the facility can be determined according to the ratio between the total number m of the pumping facilities, the pumping performance P Pump and the power P saugen to be adsorbed, i.e., P Generator= m*P pumpen- P saugen,wherein the sensor group comprises a power station power station voltage and current sensor, an ultrasonic flow meter, a pressure sensor, and a water level sensor, etc., wherein the power station voltage and current sensor indicate that a voltage converter and a current converter are provided at the outlet of the power station of the pumped storage stations, wherein the real-time voltage and the real-time current respectively supplied by the voltage converter and the current converter are used for calculating the actual power of the pumped storage station; wherein the water level sensor detects the current water level of the power station and the ultrasonic flow meter detects the flow rate of the station; wherein the theoretical performance is calculated according to the current water level and the flow rate of the power plant detected by the water level sensor and the ultrasonic flowmeter, respectively, and wherein the efficiency η Generator of the plant is calculated according to the actual performance and the theoretical performance; wherein the pressure sensor electrically connected to the pump storage plant detects the pressure at the inlet and outlet of the bypass pipe portion, the bypass pipe portion, the plant portion, the subsea pipe portion and the subsea portion, respectively, wherein the calculation unit of the pump storage plant calculates the efficiency of each portion according to the flow rate detected by the ultrasonic flowmeter and the position increase of the detected cut, the total efficiency by multiplication; wherein the judging module judges whether the safe and stable operating range of the plant is exceeded, whether hydraulic safety requirements for the transient state under the hydraulic short-circuit operating mode based on the calculated power generation power and pump power are satisfied, respectively, according to the power generation power P Generator of the plants calculated by the power detecting unit, and whether the overall efficiency is greater than 75%, wherein, if the judgment results are all positive, the hydraulic short-circuit operating mode can be started, and wherein a command for starting the hydraulic short-circuit operating mode is issued to the monitoring system, wherein the monitoring system issues a command for starting the operation of the pump storage plant to the plant based on the number of the pump plants and the power generation power received by the power detecting unit, and wherein the on-site controller of the plant issues a command to open a ball valve and start an auxiliary system; wherein a speed controller determines, according to the output command issued by the monitoring system, from the plant operation characteristic data, the optimum vane opening for the pumping operation at the current delivery head and the opening required for the power required by the power generation plant, gradually opening and adjusting to the required vane opening.As shown in FIG. 8, FIG. 8 is a systematic diagram of the structure of a computer device according to an optional embodiment of the present invention. As shown in FIG. 8, the computing device includes one or more processors 10, a memory 20, and interfaces for interconnecting the various components, including a high speed interface and a low speed interface. The various components are communicatively interconnected via different buses and may be mounted on a common main control board or otherwise as desired. The processor may process instructions executed in the computing device, including instructions stored in or on a memory to display graphical information of the graphical user interface on an external input / output device (e.g., a display device connected to the interface). In some optional embodiments, multiple processors and / or multiple buses with multiple memories and multiple memories may be used, if desired. Likewise, a plurality of computing devices may be connected, with individual devices taking over part of the required operations (e.g., as a server array, a group of blade servers, or a multiprocessor system). In FIG. 8, a processor 10 is used as an example.The processor 10 may be a central processor, a network processor, or a combination thereof. Here, the processor 10 may further include a hardware chip, among others. The hardware chip may be a special-purpose integrated circuit, a programmable logic unit, or a combination thereof. The programmable logic unit may be a complex programmable logic unit, a field programmable logic gate array, a general purpose array logic, or any combination thereof.The memory 20 stores instructions that can be executed by the at least one processor 10 in order to cause the at least one processor 10 to perform a method for implementing the above exemplary embodiments.The memory 20 may include a storage program area and a storage data area, the storage program area may store an operating system, an application program required for at least one function, and the storage data area may store data generated based on use of a computing device for presenting a type of applet landing page and the like. Moreover, the memory 20 may include a high-speed random access memory and also a nonvolatile memory such as at least a disk storage device, a flash memory device, or another solid-state nonvolatile memory device. In some optional embodiments, memory 20 may optionally include memory located remotely relative to processor 10, and these remote memories may be connected to this computing device via a network. Examples of such networks include the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.The memory 20 may include a volatile memory, e.g., a random access memory; the memory may also include a nonvolatile memory, e.g., a flash memory, a hard disk, or a solid state drive; and the memory 20 may also include a combination of the above types of memory.The computer device further comprises a communication interface 30, via which the computer device can communicate with other devices or communication networks.The embodiments of the present invention also provide a computer readable storage medium, wherein the above method according to embodiments of the present invention may be implemented in hardware, firmware, or as computer code that can be recorded on a storage medium, or as computer code that is originally stored on a remote storage medium or a non-transitory machine readable storage medium that is downloaded via a network and that is to be stored on a local storage medium. Thereby, the method described herein may be processed by such software stored on a storage medium using a general purpose computer, special purpose processor, or programmable or special purpose hardware. The storage medium may be, but is not limited to, a magnetic disk, a compact disc, a read only memory, a random access memory, a flash memory, a hard disk, or a solid state drive; further, the storage medium may include a combination of the above types of memory. It will be appreciated that the computer, processor, microprocessor controller or programmable hardware comprises a memory component capable of storing or receiving software or computer code and when the computer, processor or hardware accesses and executes the software or computer code, the method illustrated in the above embodiments is implemented.A part of the present invention may be applied as a computer program product, such as computer program instructions, which, when executed by a computer, may, by operation of this computer, produce or provide a method and / or a technical solution according to the present invention. Those skilled in the art will appreciate that computer program instructions reside in a computer readable medium in the form of, but are not limited to, source files, executable files, installation files, and the like. Accordingly, the manner in which the computer program instructions are executed by the computer includes, among other things, the computer directly executing the instructions, or the computer compiles the instructions and then executes a corresponding post-compilation program, or the computer reads and executes the instructions, or the computer reads and installs the instructions and then executes a corresponding post-installation program. In this case, the computer-readable medium can be any available computer-readable storage medium or communication medium that is accessible to the computer.Although embodiments of the present invention will be described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations fall within the scope defined by the appended claims.

Claims

A system for adjusting the pumping capacity of pumped storage facilities, characterized in that it comprises a capacity detection unit, a sensor group, a judgment module, a monitoring system and a speed control system; wherein the capacity detection unit is connected to the monitoring system of the computer for detecting the capacity P saugen to be adsorbed arranged by the network planning site and for determining the total number m of the pumping facilities according to the ratio between the pumping capacity of the facility and the capacity to be adsorbed, so that the power generation capacity of the facility can be determined according to the ratio between the total number m of the pumping facilities, the pumping capacity P Pump and the capacity P saugen to be adsorbed, i.e. P Generator= m*P pumpen- P saugen, wherein the sensor group comprises a voltage and current sensor of the plant of the power plant, an ultrasonic flow meter, a pressure sensor and a water level sensor, wherein the voltage and current sensor of the plant indicates that a voltage converter and a current converter are provided at the outlet of the power plant of the pump storage plants, wherein the real-time voltage and the real-time current, which are respectively supplied by the voltage converter and the current converter, are used for calculating the actual power of the pump storage plant; wherein the water level sensor detects the current water level of the power plant and the ultrasonic flow meter detects the flow rate of the plant; wherein the theoretical performance is calculated according to the current water level and the flow rate of the power plant detected by the water level sensor and the ultrasonic flowmeter, respectively, and wherein the efficiency η Generator of the plant is calculated according to the actual performance and the theoretical performance; wherein the pressure sensor electrically connected to the pump storage plant detects the pressure at the inlet and outlet of the bypass pipe portion, the bypass pipe portion, the plant portion, the subsea pipe portion and the subsea portion, respectively, wherein the calculation unit of the pump storage plant calculates the efficiency of each portion according to the flow rate detected by the ultrasonic flowmeter and the position increase of the detected cut, the total efficiency by multiplication; wherein the judging module judges whether the safe and stable operating range of the plant is exceeded, whether hydraulic safety requirements for the transient state under the hydraulic short-circuit operating mode based on the calculated power generation power and pump power are satisfied, respectively, according to the power generation power P Generator of the plants calculated by the power detecting unit, and whether the overall efficiency is greater than 75%, wherein, if the judgment results are all positive, the hydraulic short-circuit operating mode can be started, and wherein a command for starting the hydraulic short-circuit operating mode is issued to the monitoring system, wherein the monitoring system issues a command for starting the operation of the pump storage plant to the plant based on the number of the pump plants and the power generation power received by the power detecting unit, and wherein the on-site controller of the plant issues a command to open a ball valve and start an auxiliary system; wherein a speed controller determines, according to the output command issued by the monitoring system, from the plant operation characteristic data, the optimum vane opening for the pumping operation at the current delivery head and the opening required for the power required by the power generation plant, gradually opening and adjusting to the required vane opening.

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