CN116773941A - Operation test method and device for pumped storage unit and storage medium - Google Patents

Abstract

The invention discloses an operation test method, a device and a storage medium of a pumped storage unit, and relates to the field of pumped storage power generation, wherein the method comprises the following steps: acquiring a working condition test set of the pumped storage unit; the working condition test set comprises a plurality of working condition test items, wherein the working condition test items comprise a power generation working condition, a power generation phase modulation working condition, a water pumping phase modulation working condition and an accident shutdown working condition; acquiring a working condition test sequence corresponding to the working condition test set, and sequentially executing all working condition test items according to the working condition test sequence; and acquiring an operation test result of the pumped storage unit according to the test result of each working condition test item. According to the technical scheme, the automatic operation test of the pumped storage unit is realized, the labor cost occupied by the operation test of the water storage unit is reduced, the phenomena of missing detection and false detection are avoided, the accuracy of the test result is greatly improved, and the coverage range of the operation test of the pumped storage unit is expanded.

Description

Operation test method and device for pumped storage unit and storage medium

Technical Field

The invention relates to the field of pumped storage power generation, in particular to an operation test method, an operation test device and a storage medium of a pumped storage unit.

Background

The monitoring flow simulation test is a critical test item in operation and debugging of the pumped storage unit, and aims to check the operation state of the unit under each working condition.

The method is different from the traditional hydroelectric generating set debugging, the operation test of the pumped storage set has the characteristics of multiple working conditions, complex working condition conversion flow and high debugging difficulty, the monitoring simulation of the existing pumped storage set does not form a standardized flow, and the method is completely dependent on the field debugging of debugging personnel.

However, the above-mentioned debugging mode not only needs to occupy a large amount of human costs, relies on the skill level and the debugging experience of debugging personnel moreover, often leads to the check-up of monitor signal and flow to accomplish comprehensive detection inaccurately, consequently often appears leaking to examine, mispriming the phenomenon, and the degree of accuracy of test result is relatively poor, and the coverage rate of test scope is lower.

Disclosure of Invention

The invention provides an operation test method, an operation test device, electronic equipment and a storage medium of a pumped storage unit, which are used for solving the problem of low operation test efficiency of the pumped storage unit.

According to an aspect of the present invention, there is provided a method of testing operation of a pumped-storage unit, comprising:

Acquiring a working condition test set of the pumped storage unit; the working condition test set comprises a plurality of working condition test items, wherein the working condition test items comprise a power generation working condition, a power generation phase modulation working condition, a water pumping phase modulation working condition and an accident shutdown working condition;

acquiring a working condition test sequence corresponding to the working condition test set, and sequentially executing each working condition test item according to the working condition test sequence;

and acquiring an operation test result of the pumped storage unit according to the test result of each working condition test item.

According to another aspect of the present invention there is provided an operation testing device for a pumped-storage unit comprising:

the working condition test set acquisition module is used for acquiring a working condition test set of the pumped storage unit; the working condition test set comprises a plurality of working condition test items, wherein the working condition test items comprise a power generation working condition, a power generation phase modulation working condition, a water pumping phase modulation working condition and an accident shutdown working condition;

the working condition test item execution module is used for acquiring a working condition test sequence corresponding to the working condition test set and sequentially executing each working condition test item according to the working condition test sequence;

and the test result acquisition module is used for acquiring the operation test result of the pumped storage unit according to the test result of each working condition test item.

According to another aspect of the present invention, there is provided an electronic apparatus including:

at least one processor; and

a memory communicatively coupled to the at least one processor; wherein, the liquid crystal display device comprises a liquid crystal display device,

the memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the method of testing operation of the pump-storage unit of any of the embodiments of the present invention.

According to another aspect of the present invention, there is provided a computer readable storage medium storing computer instructions for causing a processor to execute a method of testing operation of a pumped-storage unit according to any one of the embodiments of the present invention.

According to the technical scheme, after the working condition test set of the pumped storage unit is obtained, each working condition test item is sequentially executed according to the working condition test sequence, and then the operation test result of the pumped storage unit is obtained according to the test result of each working condition test item, so that the automatic operation test of the pumped storage unit is realized, the labor cost occupied by the operation test of the pumped storage unit is reduced, the phenomena of missing detection and false detection are avoided, the accuracy of the test result is greatly improved, and the coverage range of the operation test of the pumped storage unit is expanded.

It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a flow chart of a method of testing operation of a pumped-storage unit according to a first embodiment of the present invention;

FIG. 2 is a flow chart of a method of testing operation of a pumped-storage unit according to a second embodiment of the present invention;

FIG. 3 is a flow chart of a method of testing operation of a pumped-storage unit according to a third embodiment of the present invention;

FIG. 4 is a schematic structural view of an operation testing device for a pumped-storage unit according to a fourth embodiment of the present invention;

fig. 5 is a schematic structural diagram of an electronic device implementing a method of testing operation of a pumped-storage unit according to an embodiment of the invention.

Detailed Description

In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Example 1

Fig. 1 is a flowchart of a method for testing operation of a pumped-storage unit according to a first embodiment of the present invention, where the method may be applied to a scenario of testing operation of a pumped-storage unit, where the method may be performed by an operation testing device of a pumped-storage unit, where the operation testing device of a pumped-storage unit may be implemented in hardware and/or software, and where the operation testing device of a pumped-storage unit is configured in an electronic device, such as a server, typically may be configured in a management terminal device of a pumped-storage unit. As shown in fig. 1, the method includes:

s101, acquiring a working condition test set of a pumped storage unit; the working condition test set comprises a plurality of working condition test items, wherein the working condition test items comprise a power generation working condition, a power generation phase modulation working condition, a water pumping phase modulation working condition and an accident shutdown working condition.

The pumped storage unit consists of a plurality of pumped storage generator motors, and the pumped storage generator motors operate as generators when generating electricity and as motors when pumping water; in the embodiment of the invention, when the operation test is performed on the pumped storage unit, the operation test can be sequentially performed on each pumped storage generator motor in the unit, and the operation test can also be simultaneously performed on each pumped storage generator motor.

The power generation working condition is a process of converting potential energy of water into electric energy by the pumped storage unit based on the rotation action of water on the rotor of the water turbine, and the pumped storage unit is used as a power generation device for external power generation at the moment; the power generation phase modulation working condition is an operation mode that a pumped storage unit machine is operated under the power generation working condition, and the guide vane and the ball valve are closed, and the water level of the runner chamber is pressed below the water turbine by high-pressure air, so that reactive power is output to a power transmission network, and the voltage of a power system is regulated; the pumping working condition refers to an operation mode that a pumping energy storage unit utilizes redundant electric energy of an electric power system to pump downstream water to upstream so as to store the water for standby; the pumping phase modulation working condition is a running mode that a pumping energy storage unit is started in a pumping direction (opposite to a power generation direction) so as to charge and press water into a runner chamber, and then the water turbine is gradually rotated under the action of a dragging device; the accident shutdown working condition refers to the process of smoothly transitioning the operation working condition to the shutdown working condition by gradually closing various functional components when the pumped storage unit encounters various sudden accidents.

S102, acquiring a working condition test sequence corresponding to the working condition test set, and sequentially executing each working condition test item according to the working condition test sequence.

The working condition test items can be independently tested according to the test requirements, namely, each test is only carried out aiming at one working condition, and each working condition test item does not have any association relation, so that the working condition test sequence can be in an arbitrary ordering mode; and the working condition test items can be sequenced according to the test requirements, and the working condition test items are sequentially executed according to the sequencing result, so that the test efficiency is improved.

For example, the pumped storage unit cannot be directly switched to the power generation phasing condition no matter when the pumped storage unit is operated as a power generator after the start operation is performed by the non-start static state or when the pumped storage unit is operated as a motor, the power generation phasing condition needs to be switched to the power generation phasing condition by taking the power generation condition as an operation basis in the power generation condition, and therefore the power generation condition test can be configured before the power generation phasing condition test. The pumping energy storage unit can not be directly switched to the pumping working condition no matter the pumping energy storage unit is used as a motor to execute starting operation or is used as a generator to run to generate power working condition after being not started, the pumping working condition needs to be switched to the pumping working condition in the pumping phase modulation working condition by taking the pumping phase modulation working condition as a running basis, and therefore the pumping phase modulation working condition test can be configured and executed before the pumping working condition test.

The two working condition test items (namely the water pumping working condition and the water pumping phase modulation working condition) in the water pumping direction can be placed before the two working condition test items (namely the power generation working condition and the power generation phase modulation working condition) in the power generation direction according to the test requirements, and can also be placed after the two working condition test items in the power generation direction; the accident shutdown test can be used as a state test under the extreme condition and can be placed after the working condition test item, so that not only the comprehensiveness and the accuracy of a test result can be ensured, but also the normal working condition operation of the pumped storage unit is ensured to be free of errors after the test is finished, the accident shutdown test under the extreme condition is executed, and the safety of the accident shutdown working condition test is improved.

In the operation test of each working condition, the current electronic equipment respectively sends starting or closing signals to each functional component based on a preset test communication sequence and acquires the operation state signals fed back by the starting or closing signals, so that the operation test of all the functional components under the current working condition is finished, and the difference between the operation states of all the functional components and the expected test results reflects the test results of the current working condition test item.

Optionally, in this embodiment of the present invention, the obtaining a working condition test sequence corresponding to the working condition test set specifically includes: randomly inserting the accident shutdown working conditions into a first working condition sequence and/or a second working condition sequence, and forming a working condition test sequence by the inserted first working condition sequence and the inserted second working condition sequence; the first working condition sequence before insertion comprises a power generation working condition and a power generation phase modulation working condition which are sequentially executed; the second working condition sequence before insertion comprises a pumping phase modulation working condition and a pumping working condition which are sequentially executed.

Specifically, as described in the above technical solution, the first working condition sequence includes a power generation working condition and a power generation phase modulation working condition that are sequentially executed, and the second working condition sequence includes a pumping phase modulation working condition and a pumping working condition that are sequentially executed, so that when the power generation phase modulation working condition test is executed, the power generation working condition test is ensured to be completed, so that after the power generation working condition is completed by the pump storage unit in a steady operation, the pump storage unit can be stably transited to the power generation phase modulation working condition, and also when the pumping working condition test is executed, the pumping phase modulation working condition test is ensured to be completed, and the pump storage unit is ensured to be transited to the pumping working condition again in a steady operation after the pump storage working condition is executed; meanwhile, the accident shutdown working condition test can be alternated among other working condition tests, so that the randomness of the test is increased, and the test integrity of the pumped storage unit is improved.

Optionally, in this embodiment of the present invention, the obtaining a working condition test sequence corresponding to the working condition test set specifically further includes: acquiring a pre-condition set corresponding to each working condition test item respectively; wherein each of the precondition sets includes a plurality of preconditions; judging whether abnormal working condition test items exist in the working condition test items according to the specific gravity coefficients of the preset conditions of the preset condition set compliance; the specific gravity coefficient of the precondition set compliance precondition corresponding to the abnormal working condition test item is smaller than or equal to a matched preset specific gravity threshold; if no abnormal working condition test items exist, acquiring a working condition test sequence according to the test priority of each working condition test item; if the abnormal working condition test items are determined to exist, a third working condition sequence is obtained according to the test priority of each normal working condition test item, and the abnormal working condition test items are configured at the tail end of the third working condition sequence so as to obtain the configured working condition test sequence.

Specifically, before the pumped storage unit operates, whether various auxiliary functional components are started and operate normally needs to be detected, so that the effective operation of the auxiliary functional components can be ensured, and the safe operation of the pumped storage unit can be ensured; for example, when the power generation working condition or the power generation phase modulation working condition is executed, the installation and debugging of the upstream and downstream water level monitoring system are required to be completed, and the water level information reported by the upstream and downstream water level monitoring system accords with a preset water level threshold; the main transformer related to the power generation and power transmission of the pumped storage unit is installed and debugged, and a starting signal reported by the main transformer is obtained; when the pumping working condition or the pumping phase modulation working condition is executed, the air compressing system is required to be started and run normally, and the variable frequency starting device is required to be started and run normally; therefore, according to different working condition test items, different pre-condition sets are obtained, and communication is carried out on the pre-condition sets and the auxiliary function components corresponding to the pre-condition sets respectively so as to obtain the running state information of the auxiliary function components.

The compliance preconditions, that is, the operation state of the auxiliary function system corresponding to the preconditions is normal, and the specific gravity coefficient of the compliance preconditions can be set to be a higher value, for example, 90% or 100%, that is, all preconditions in the preconditions are required to be compliance preconditions, so that the test foundation of the working condition test item is provided; therefore, if the abnormal working condition test item exists, the abnormal working condition test item can be arranged at the end of the test sequence, so that the repair of the pre-condition of the abnormal working condition test item is waited for to be completed while other working condition tests are executed, and the operation test efficiency of the pumped storage unit is improved.

S103, according to the test results of the working condition test items, obtaining the operation test results of the pumped storage unit.

If the functional components corresponding to each working condition test item pass the test, the pumped storage unit is indicated to pass the operation test; if the functional components which do not pass the test exist in the at least one working condition test item, the functional components indicate that the pumped storage unit does not pass the operation test. Particularly, each working condition of the pumped storage unit needs to be communicated with a plurality of associated components, and the functions of part of the associated components are only redundant protection, so that the test result does not substantially influence the normal operation of the pumped storage unit, and therefore, a matched preset duty ratio threshold can be set for each working condition test item respectively.

If the number of functional components meeting the expected standard under one working condition test item is greater than or equal to a preset duty ratio threshold value, the working condition test item is tested, if the number of functional components meeting the expected standard under one working condition test item is less than the preset duty ratio threshold value, the working condition test item is not tested; therefore, if all the working condition test items pass the test, the pumped storage unit can be determined to pass the operation test, and if at least one working condition test item in all the working condition test items fails the test, the pumped storage unit can be determined to fail the operation test.

According to the technical scheme, after the working condition test set of the pumped storage unit is obtained, each working condition test item is sequentially executed according to the working condition test sequence, and then the operation test result of the pumped storage unit is obtained according to the test result of each working condition test item, so that the automatic operation test of the pumped storage unit is realized, the labor cost occupied by the operation test of the pumped storage unit is reduced, the phenomena of missing detection and false detection are avoided, the accuracy of the test result is greatly improved, and the coverage range of the operation test of the pumped storage unit is expanded.

Example two

Fig. 2 is a flowchart of a method for testing operation of a pumped-storage unit according to a second embodiment of the present invention, where the relationship between the present embodiment and the above embodiments is that each working condition test item includes a corresponding stage test set. As shown in fig. 2, the method includes:

s201, acquiring a working condition test set of a pumped storage unit; the working condition test set comprises a plurality of working condition test items, wherein the working condition test items comprise a power generation working condition, a power generation phase modulation working condition, a water pumping phase modulation working condition and an accident shutdown working condition.

S202, acquiring a working condition test sequence corresponding to the working condition test set.

S203, sequentially acquiring a stage test set corresponding to each working condition test item according to the working condition test sequence; wherein the phase test set includes a plurality of phase test items; the phase test items corresponding to the power generation working conditions comprise at least one of a start-up no-load test, an no-load power generation test and a power generation stop test; the phase test items corresponding to the power generation phase modulation working conditions comprise at least one of a power generation phase modulation test, a phase modulation power generation test and a power generation phase modulation shutdown test; the stage test items corresponding to the pumping working conditions comprise at least one of pumping shutdown tests and pumping power generation tests; the phase test items corresponding to the pumping phase modulation working condition comprise at least one of a start-up phase modulation test, a pumping phase modulation shutdown test, a phase modulation pumping test and a pumping phase modulation test; the accident shutdown test includes at least one of a load-shedding shutdown test and a load-dump shutdown test.

Specifically, the start-up no-load test refers to an operation test of switching from an inactive static state to a power generation no-load state when the pumped storage unit is used as a power generator; the power generation idle state refers to a stage that the motor rotating speed of the pumped storage unit reaches the rated rotating speed, but power generation is not outputted externally. The no-load power generation test is an operation test for switching the pumped storage unit from a power generation no-load state to an external output power supply state; the output power supply state refers to an operation state that the pumped storage unit simultaneously provides active power and reactive power outwards. The power generation shutdown test refers to an operation test that the pumped storage unit is switched from an external output power supply state to a shutdown state.

The power generation phase modulation test refers to an operation state that the pumped storage unit is switched from an external output power supply state to an external reactive power supply state and does not provide an active power state. The phase modulation power generation test refers to an operation state that the pumped storage unit provides reactive power from outside and does not provide active power, and is switched to an operation state that the pumped storage unit provides reactive power and active power at the same time. The power generation phase modulation shutdown test refers to an operation test that a pumped storage unit provides reactive power from outside and does not provide active power, and is switched to a shutdown state.

The start-up phase modulation test is an operation test for switching from an unactuated static state to a pumping phase modulation state when the pumped storage unit is used as a motor; the pumping phase modulation state refers to an operation state that the pumping energy storage unit obtains reactive power provided by the outside and does not obtain active power provided by the outside. The pumped phase modulation shutdown test refers to an operation test that a pumped storage unit is switched to a shutdown state by acquiring an operation state of reactive power provided by the outside. The phase modulation pumping test refers to an operation test that the pumping energy storage machine is switched from a pumping phase modulation state to obtain active power and reactive power provided by the outside at the same time; the pumped phase modulation test refers to an operation test that the pumped storage unit is switched from simultaneously acquiring active power and reactive power provided by the outside to acquiring only reactive power provided by the outside.

The pumping stop test is an operation test for switching the pumping energy storage unit into a stop state by acquiring active power and reactive power provided by the outside; the pumped power generation test refers to that the pumped storage unit is switched to an operation state for providing active power and reactive power to the outside from an operation state for obtaining the active power and the reactive power provided by the outside. The load shedding is a process of reducing the generated energy to a value suitable for the actual load when the power consumption load of a pumped storage unit suddenly decreases (for example, large-scale electric equipment faults or large-area line faults are power-off) and other emergency conditions of an end user, or a process of suddenly reducing the power consumption load to 0 caused by the fault of a functional component (for example, the sudden tripping of a power-out outlet breaker), and a load shedding shutdown test is performed, namely, whether the pumped storage generator has a step-by-step safe shutdown function in the load shedding process is tested; the load reduction is to run the pumped storage unit by reducing the voltage, so that the load reduction is planned, and the load reduction shutdown test is to test whether the pumped storage generator has a step-by-step safe shutdown function in the load reduction process.

S204, executing each stage test item in sequence according to the stage test set corresponding to the current working condition test item.

S205, acquiring operation test results of the pumped storage unit according to the test results of the working condition test items.

Optionally, in this embodiment of the present invention, the executing each of the working condition test items sequentially according to the working condition test sequence specifically includes: and according to the working condition test sequence, sequentially executing a start-up phase modulation test, a phase modulation pumping test, a pumping power generation test, a power generation phase modulation test and a power generation phase modulation shutdown test.

Specifically, as described in the above technical solution, the start-up phase modulation test, the phase modulation pumping test, the pumping power generation test, the power generation phase modulation test and the phase modulation shutdown test respectively correspond to the operation test of switching the pumping energy storage unit from the non-started static state to the pumping phase modulation state, switching the pumping phase modulation state to the operation test of simultaneously acquiring the active power and the reactive power provided by the outside, switching the operation state of acquiring the active power and the reactive power provided by the outside to the operation test of providing the active power and the reactive power to the outside, switching the operation test of providing the active power and the reactive power to the outside, and switching the operation state of providing the reactive power to the outside to the shutdown state; obviously, the test mode not only completely covers various running states such as starting up, stopping, power generation working conditions, power generation phase modulation working conditions, water pumping phase modulation working conditions and the like, but also ensures that all test processes are mutually connected, thereby avoiding the existence of redundant tests and greatly improving the test efficiency.

According to the technical scheme, in each working condition test item, the working condition test process is split into different test stages, the operation states of the pumped storage unit in the different test stages under each working condition are respectively obtained, more accurate and detailed operation test results are conveniently obtained in the operation test of the pumped storage unit, and the convenience of maintaining the pumped storage unit is improved.

Example III

Fig. 3 is a flowchart of a method for testing operation of a pumped-storage unit according to a third embodiment of the present invention, where the relationship between the present embodiment and the above embodiments is that each stage test item includes a corresponding stage test set. As shown in fig. 3, the method includes:

s301, acquiring a working condition test set of a pumped storage unit; the working condition test set comprises a plurality of working condition test items, wherein the working condition test items comprise a power generation working condition, a power generation phase modulation working condition, a water pumping phase modulation working condition and an accident shutdown working condition.

S302, acquiring a working condition test sequence corresponding to the working condition test set.

S303, sequentially acquiring a stage test set corresponding to each working condition test item according to the working condition test sequence; wherein the phase test set includes a plurality of phase test items; the phase test items corresponding to the power generation working conditions comprise at least one of a start-up no-load test, an no-load power generation test and a power generation stop test; the phase test items corresponding to the power generation phase modulation working conditions comprise at least one of a power generation phase modulation test, a phase modulation power generation test and a power generation phase modulation shutdown test; the stage test items corresponding to the pumping working conditions comprise at least one of pumping shutdown tests and pumping power generation tests; the phase test items corresponding to the pumping phase modulation working condition comprise at least one of a start-up phase modulation test, a pumping phase modulation shutdown test, a phase modulation pumping test and a pumping phase modulation test; the accident shutdown test includes at least one of a load-shedding shutdown test and a load-dump shutdown test.

S304, acquiring a testing step set matched with the current stage test item according to the stage test set corresponding to the current working condition test item; wherein the set of test steps includes a plurality of test steps.

In each stage test item, each test step reflects a functional test of one or more functional components, i.e., the acquisition of an operational status signal of one or more associated components, or the issuance of an operational status control signal to one or more associated components. All the test steps which are sequentially executed in the test step set reflect all the test contents of the test items at the stage together and the specific test flow.

Taking the technical scheme as an example, the testing step set corresponding to the startup no-load test comprises the steps of firstly sending a startup signal to related components such as a governor oil pressure device, a water inlet valve oil station, a high-pressure jacking oil pump and the like; secondly, acquiring starting completion signals fed back by the related components such as the governor oil pressure device, the water inlet valve oil station and the high-pressure jacking oil pump; then auxiliary components such as a reversing knife switch, a speed regulator, a ball valve and the like are set to be in a power generation working mode; and finally, when the motor rotating speed of the pumped storage unit reaches the rated rotating speed and the voltage reaches the rated voltage, determining that the pumped storage unit enters a power generation idle state, and thus completing a start-up idle test under the power generation working condition.

The testing step set corresponding to the no-load power generation test comprises the steps of firstly setting a speed regulator as a power mode, setting the active power of a pumped storage unit as a permissible minimum running load and setting the reactive power of the pumped storage unit as 0; and secondly, when the load of the pumped storage unit is determined to reach the minimum operation load, determining that the pumped storage unit enters an external power generation stage, and thus completing an idle power generation test under the power generation working condition.

The corresponding testing step set of the power generation shutdown test comprises the steps of firstly setting the active power of the pumped storage unit to 0 and setting the reactive power of the excitation system to 0; secondly, sending a closing instruction to related components such as a magnetic extinction switch, a guide vane servomotor, a speed regulator close-stop valve, a ball valve close-stop valve and the like; and finally, when the motor rotating speed is less than or equal to a specified speed (for example, 5% of the rated rotating speed), determining that the pumped storage unit enters a shutdown stage, and thus completing a power generation shutdown test under a power generation working condition.

The testing steps corresponding to the power generation phase modulation test comprise the steps of firstly setting the active power of a pumped storage unit to be 0, setting a speed regulator to be a phase modulation mode, closing a guide vane of the speed regulator, and setting a protection mode to be a power generation phase modulation mode; secondly, opening the upper and lower leakage stop ring electric valves, and closing the ball valve and the ball valve tightly stopping valve; and finally, when the water level of the draft tube is lower than the middle water level or the low water level, determining that the pumped storage unit enters a phase modulation state, thereby completing a power generation phase modulation test under the power generation phase modulation working condition.

The testing steps corresponding to the phase modulation power generation test comprise firstly opening a ball valve tightly-stopping valve, exiting the guide vane servomotor for locking, and opening a speed regulator tightly-stopping valve; secondly, setting a speed regulator as a power mode, setting the active power of the pumped storage unit as a permissible minimum operation load, and setting the reactive power as 0; and finally, when the active power of the pumped storage unit reaches the minimum running load, determining that the pumped storage unit enters a power generation state, thereby completing the phase modulation power generation test under the power generation phase modulation working condition.

The testing step set corresponding to the power generation phase modulation shutdown test comprises the steps of starting thrust high pressure to jack up an oil pump; secondly, mechanical braking is stopped, an electric braking switch is disconnected, and a commutation disconnecting link is disconnected; then, sending a closing instruction to the external circulation oil pump, the oil mist absorbing device, the carbon powder absorbing device and the water guide external circulation oil pump; and finally, determining that the pumped storage unit enters a shutdown state when determining that the stop completion signals fed back by the external circulating oil pump, the oil mist absorbing device, the carbon powder absorbing device and the water guide external circulating oil pump are acquired, thereby completing the power generation phase modulation shutdown test under the power generation phase modulation working condition.

The testing step set corresponding to the start-up phase modulation test comprises the steps of firstly sending a start signal to related components such as a governor oil pressure device, a water inlet valve oil station, a high-pressure jacking oil pump and the like; secondly, acquiring starting completion signals fed back by the related components such as the governor oil pressure device, the water inlet valve oil station and the high-pressure jacking oil pump; then auxiliary components such as a reversing knife switch, a speed regulator, a ball valve and the like are set to be in a water pumping working mode; and finally, when the motor rotating speed of the pumped storage unit reaches a specified rotating speed (for example, 97% of a rated rotating speed) and the voltage reaches a specified voltage (for example, 90% of the rated voltage), determining that the pumped storage unit enters a pumped phase modulation state, and thus completing a start-up phase modulation test under the working condition of pumped phase modulation.

The testing step set corresponding to the pumping phase modulation shutdown test comprises the steps of starting thrust high pressure to jack up the oil pump; secondly, mechanical braking is stopped, an electric braking switch is disconnected, and a commutation disconnecting link is disconnected; then, sending a closing instruction to the external circulation oil pump, the oil mist absorbing device, the carbon powder absorbing device and the water guide external circulation oil pump; and finally, determining that the pumped storage unit enters a shutdown state when determining that the stopping completion signals fed back by the external circulating oil pump, the oil mist absorbing device, the carbon powder absorbing device and the water guide external circulating oil pump are obtained, thereby completing the pumped phase modulation shutdown test under the pumped phase modulation working condition.

The testing steps corresponding to the phase modulation pumping test comprise opening a ball valve tightly-stopping valve, exiting the guide vane servomotor for locking, and opening a speed regulator tightly-stopping valve; secondly, configuring a set value (for example, -50 MW) for the active power of the pumped storage unit, or configuring a set value for the opening degree of a guide vane of the pumped storage unit; and finally, when the active power of the pumped storage unit is determined to be larger than the set value or the opening of the guide vane is determined to be larger than the set value, determining that the pumped storage unit enters a pumping state, and thus completing the phase modulation pumping test under the pumping phase modulation working condition.

The corresponding test step set of the pumping phase modulation test comprises the steps of firstly setting the reactive power of an excitation system to 0, setting a speed regulator to be in a phase modulation mode, closing a guide vane of the speed regulator, and setting a protection mode to be in a water pump phase modulation mode; secondly, opening the upper and lower leakage stop ring electric valves, and closing the ball valve and the ball valve tightly stopping valve; and finally, when the water level of the draft tube is lower than the middle water level or the low water level, determining that the pumped storage unit enters a pumped phase modulation state, thereby completing a pumped phase modulation test under the working condition of pumped phase modulation.

The corresponding test step set of the pumping shutdown test comprises the steps of firstly setting the reactive power of an excitation system to 0; secondly, sending a closing instruction to related components such as a magnetic extinction switch, a guide vane servomotor, a speed regulator close-stop valve, a ball valve close-stop valve and the like; and finally, when the motor rotating speed is less than or equal to a specified speed (for example, 5% of the rated rotating speed), determining that the pumped storage unit enters a shutdown stage, and thus completing the pumped shutdown test under the pumping working condition.

The corresponding test step set of the pumping power generation test comprises the steps of firstly setting a speed regulator to be in a water turbine mode, setting an excitation mode to be in a power generation mode, and setting a main transformer water supply valve to be in a load from an idle load; secondly, setting the active power of the pumped storage unit as the allowable minimum operation load and setting the reactive power as 0; and finally, when the active power of the pumped storage unit reaches the minimum running load, determining that the pumped storage unit enters a power generation state, and thus completing the pumped power generation test under the pumping working condition.

The testing step set corresponding to the load shedding shutdown test comprises the steps of firstly sending a closing instruction to a ball valve, a ball valve close-shut valve, a speed regulator and a speed regulator close-shut valve; secondly, mechanical braking is stopped, an electric braking switch is disconnected, and a commutation disconnecting link is disconnected; then, sending a closing instruction to the external circulation oil pump, the oil mist absorbing device, the carbon powder absorbing device and the water guide external circulation oil pump; and finally, determining that the pumped storage unit enters a shutdown state when determining that the stopping completion signals fed back by the external circulating oil pump, the oil mist absorbing device, the carbon powder absorbing device and the water guide external circulating oil pump are acquired, thereby completing a load shedding shutdown test under the accident shutdown working condition.

The testing step set corresponding to the load reduction shutdown test comprises the steps of firstly sending a closing instruction to a ball valve, a ball valve close-shut valve, a speed regulator and a speed regulator close-shut valve; secondly, disconnecting the pull switch of the pumped storage unit, and disconnecting the start switch of the pumped storage unit; then the mechanical braking is stopped, the electric braking switch is disconnected, and the commutation disconnecting link is disconnected; then sending a closing instruction to the external circulation oil pump, the oil mist absorbing device, the carbon powder absorbing device and the water guide external circulation oil pump; finally, when the stopping completion signals fed back by the external circulating oil pump, the oil mist absorbing device, the carbon powder absorbing device and the water guide external circulating oil pump are obtained, the pumped storage unit is determined to enter a stopping state, and thus the load-reducing stopping test under the accident stopping working condition is completed

S305, executing each test step in turn according to the test step set matched with the test item in the current stage.

S306, acquiring operation test results of the pumped storage unit according to the test results of the working condition test items.

Acquiring the total sum of test steps and the total sum of effective test steps of the pumped storage unit under various working condition test items according to the test step set of each working condition test item; wherein, the effective testing step means that each functional component related to the current testing step is tested, and the testing result (e.g. running state) of each functional component accords with the expected result; and then the ratio of the sum of the effective test steps to the sum of the test steps is used as the test coverage rate of the pumped storage unit, and if the test coverage rate is greater than or equal to a preset proportion threshold value, the pumped storage unit is indicated to pass the working condition test; and if the test coverage rate is smaller than a preset proportion threshold value, indicating that the pumped storage unit fails the working condition test.

Optionally, in this embodiment of the present invention, the testing step set matching according to the test item of the current stage sequentially executes each testing step, which specifically includes: acquiring a first testing step set corresponding to a current stage test item and a second testing step set corresponding to a pre-stage test item; the pre-stage test item is a stage test item adjacent to and before the current stage test item; acquiring the same test steps in the first test step set and the second test step set, and deleting the same test steps in the first test step set; and executing each testing step in sequence according to the first testing step set deleted by the same testing step.

Specifically, as described in the above technical solution, in two adjacent stage test items, there may be the same test steps, for example, in the closing operation step of the ball valve, for the above repeatedly performed test steps, the same test steps repeated in the first test step set may be deleted by pre-comparing the first test step set with the second test step set, and further, based on the deleted first test step set of the same test steps, the operation test of the current stage test item is performed, so that the repeated performance of the redundant test steps is avoided, and the operation test efficiency of the pumped storage unit is further improved.

According to the technical scheme provided by the embodiment of the invention, in each stage test item, the working condition test process is split into different test steps, the running states of the pumped storage unit in the different test steps under each stage test are respectively obtained, so that more accurate and more detailed running test results can be conveniently obtained in the running test of the pumped storage unit, and the convenience in maintaining the pumped storage unit is improved.

Example IV

Fig. 4 is a block diagram of an operation testing device for a pump storage unit according to a fourth embodiment of the present invention, where the device specifically includes:

The working condition test set acquisition module 401 is used for acquiring a working condition test set of the pumped storage unit; the working condition test set comprises a plurality of working condition test items, wherein the working condition test items comprise a power generation working condition, a power generation phase modulation working condition, a water pumping phase modulation working condition and an accident shutdown working condition;

the working condition test item execution module 402 is configured to obtain a working condition test sequence corresponding to the working condition test set, and sequentially execute each working condition test item according to the working condition test sequence;

and the test result obtaining module 403 is configured to obtain an operation test result of the pumped storage unit according to the test result of each working condition test item.

According to the technical scheme, after the working condition test set of the pumped storage unit is obtained, each working condition test item is sequentially executed according to the working condition test sequence, and then the operation test result of the pumped storage unit is obtained according to the test result of each working condition test item, so that the automatic operation test of the pumped storage unit is realized, the labor cost occupied by the operation test of the pumped storage unit is reduced, the phenomena of missing detection and false detection are avoided, the accuracy of the test result is greatly improved, and the coverage range of the operation test of the pumped storage unit is expanded.

Optionally, the working condition test item execution module 402 is specifically configured to randomly insert the accident shutdown working condition into the first working condition sequence and/or the second working condition sequence, and form the first working condition sequence after insertion and the second working condition sequence after insertion into the working condition test sequence; the first working condition sequence before insertion comprises a power generation working condition and a power generation phase modulation working condition which are sequentially executed; the second working condition sequence before insertion comprises a pumping phase modulation working condition and a pumping working condition which are sequentially executed.

Optionally, the working condition test item execution module 402 is specifically configured to obtain a pre-condition set corresponding to each working condition test item respectively; wherein each of the precondition sets includes a plurality of preconditions; judging whether abnormal working condition test items exist in the working condition test items according to the specific gravity coefficients of the preset conditions of the preset condition set compliance; the specific gravity coefficient of the precondition set compliance precondition corresponding to the abnormal working condition test item is smaller than or equal to a matched preset specific gravity threshold; if no abnormal working condition test items exist, acquiring a working condition test sequence according to the test priority of each working condition test item; if the abnormal working condition test items are determined to exist, a third working condition sequence is obtained according to the test priority of each normal working condition test item, and the abnormal working condition test items are configured at the tail end of the third working condition sequence so as to obtain the configured working condition test sequence.

Optionally, the working condition test item execution module 402 is specifically further configured to sequentially obtain, according to the working condition test sequence, a stage test set corresponding to each working condition test item respectively; wherein the phase test set includes a plurality of phase test items; the phase test items corresponding to the power generation working conditions comprise at least one of a start-up no-load test, an no-load power generation test and a power generation stop test; the phase test items corresponding to the power generation phase modulation working conditions comprise at least one of a power generation phase modulation test, a phase modulation power generation test and a power generation phase modulation shutdown test; the stage test items corresponding to the pumping working conditions comprise at least one of pumping shutdown tests and pumping power generation tests; the phase test items corresponding to the pumping phase modulation working condition comprise at least one of a start-up phase modulation test, a pumping phase modulation shutdown test, a phase modulation pumping test and a pumping phase modulation test; the accident shutdown test comprises at least one of a load reduction shutdown test and a load dump shutdown test; and executing each stage test item in turn according to the stage test set corresponding to the current working condition test item.

Optionally, the working condition test item execution module 402 is specifically further configured to obtain a test step set matched with the current stage test item according to the stage test set corresponding to the current working condition test item; wherein the set of test steps includes a plurality of test steps; and executing each test step in turn according to the test step set matched with the test item in the current stage.

Optionally, the working condition test item execution module 402 is specifically further configured to obtain a first test step set corresponding to a test item in the current stage and a second test step set corresponding to a test item in the pre-stage; the pre-stage test item is a stage test item adjacent to and before the current stage test item; acquiring the same test steps in the first test step set and the second test step set, and deleting the same test steps in the first test step set; and executing each testing step in sequence according to the first testing step set deleted by the same testing step.

Optionally, the operating condition test item execution module 402 is specifically further configured to sequentially execute a start-up phase modulation test, a phase modulation pumping test, a pumping power generation test, a power generation phase modulation test, and a power generation phase modulation shutdown test according to the operating condition test sequence.

The device can execute the operation test method of the pumped storage unit provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method. Technical details which are not described in detail in the present embodiment can be seen in the operation test method of the pumped storage unit provided in any embodiment of the present invention.

Example five

Fig. 5 shows a schematic diagram of the structure of an electronic device 10 that may be used to implement an embodiment of the invention. Electronic devices are intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. Electronic equipment may also represent various forms of mobile devices, such as personal digital processing, cellular telephones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be exemplary only, and are not meant to limit implementations of the inventions described and/or claimed herein.

As shown in fig. 5, the electronic device 10 includes at least one processor 11, and a memory, such as a Read Only Memory (ROM) 12, a Random Access Memory (RAM) 13, etc., communicatively connected to the at least one processor 11, in which the memory stores a computer program executable by the at least one processor, and the processor 11 may perform various appropriate actions and processes according to the computer program stored in the Read Only Memory (ROM) 12 or the computer program loaded from the storage unit 18 into the Random Access Memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 may also be stored. The processor 11, the ROM 12 and the RAM 13 are connected to each other via a bus 14. An input/output (I/O) interface 15 is also connected to bus 14.

Various components in the electronic device 10 are connected to the I/O interface 15, including: an input unit 16 such as a keyboard, a mouse, etc.; an output unit 17 such as various types of displays, speakers, and the like; a storage unit 18 such as a magnetic disk, an optical disk, or the like; and a communication unit 19 such as a network card, modem, wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information/data with other devices via a computer network, such as the internet, and/or various telecommunication networks.

The processor 11 may be a variety of general and/or special purpose processing components having processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), various specialized Artificial Intelligence (AI) computing chips, various processors running machine learning model algorithms, digital Signal Processors (DSPs), and any suitable processor, controller, microcontroller, etc. The processor 11 performs the various methods and processes described above, such as the pump-storage unit operation test method.

In some embodiments, the method of operation testing of a pumped-storage unit may be implemented as a computer program tangibly embodied on a computer-readable storage medium, such as a storage unit. In some embodiments, part or all of the computer program may be loaded and/or installed onto the heterogeneous hardware accelerator via the ROM and/or the communication unit. When the computer program is loaded into RAM and executed by the processor, one or more steps of the pump-around pump-set operation test method described above may be performed. Alternatively, in other embodiments, the processor may be configured to perform the pump-storage unit operation testing method in any other suitable manner (e.g., by means of firmware).

Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuit systems, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), systems On Chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs, the one or more computer programs may be executed and/or interpreted on a programmable system including at least one programmable processor, which may be a special purpose or general-purpose programmable processor, that may receive data and instructions from, and transmit data and instructions to, a storage system, at least one input device, and at least one output device.

A computer program for carrying out methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the computer programs, when executed by the processor, cause the functions/acts specified in the flowchart and/or block diagram block or blocks to be implemented. The computer program may execute entirely on the machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.

In the context of the present invention, a computer-readable storage medium may be a tangible medium that can contain, or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. The computer readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, the computer readable storage medium may be a machine readable signal medium. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

To provide for interaction with a user, the systems and techniques described here can be implemented on a heterogeneous hardware accelerator having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and pointing device (e.g., a mouse or a trackball) through which a user can provide input to the heterogeneous hardware accelerator. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic input, speech input, or tactile input.

The systems and techniques described here can be implemented in a computing system that includes a background component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such background, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), wide Area Networks (WANs), blockchain networks, and the internet.

The computing system may include clients and servers. The client and server are typically remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also called a cloud computing server or a cloud host, and is a host product in a cloud computing service system, so that the defects of high management difficulty and weak service expansibility in the traditional physical hosts and VPS service are overcome.

It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present invention may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present invention are achieved, and the present invention is not limited herein.

The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.

Claims (10)

1. A method of testing operation of a pumped-storage unit, comprising:

acquiring a working condition test set of the pumped storage unit; the working condition test set comprises a plurality of working condition test items, wherein the working condition test items comprise a power generation working condition, a power generation phase modulation working condition, a water pumping phase modulation working condition and an accident shutdown working condition;

acquiring a working condition test sequence corresponding to the working condition test set, and sequentially executing each working condition test item according to the working condition test sequence;

And acquiring an operation test result of the pumped storage unit according to the test result of each working condition test item.

2. The method of claim 1, wherein the obtaining the operating condition test sequence corresponding to the operating condition test set specifically includes:

randomly inserting the accident shutdown working conditions into a first working condition sequence and/or a second working condition sequence, and forming a working condition test sequence by the inserted first working condition sequence and the inserted second working condition sequence; the first working condition sequence before insertion comprises a power generation working condition and a power generation phase modulation working condition which are sequentially executed; the second working condition sequence before insertion comprises a pumping phase modulation working condition and a pumping working condition which are sequentially executed.

3. The method of claim 1, wherein the obtaining the operating condition test sequence corresponding to the operating condition test set, specifically further comprises:

acquiring a pre-condition set corresponding to each working condition test item respectively; wherein each of the precondition sets includes a plurality of preconditions;

judging whether abnormal working condition test items exist in the working condition test items according to the specific gravity coefficients of the preset conditions of the preset condition set compliance; the specific gravity coefficient of the precondition set compliance precondition corresponding to the abnormal working condition test item is smaller than or equal to a matched preset specific gravity threshold;

If no abnormal working condition test items exist, acquiring a working condition test sequence according to the test priority of each working condition test item;

if the abnormal working condition test items are determined to exist, a third working condition sequence is obtained according to the test priority of each normal working condition test item, and the abnormal working condition test items are configured at the tail end of the third working condition sequence so as to obtain the configured working condition test sequence.

4. The method according to claim 1, wherein the sequentially executing each of the operating condition test items according to the operating condition test sequence specifically includes:

according to the working condition test sequence, sequentially acquiring a stage test set corresponding to each working condition test item respectively; wherein the phase test set includes a plurality of phase test items; the phase test items corresponding to the power generation working conditions comprise at least one of a start-up no-load test, an no-load power generation test and a power generation stop test; the phase test items corresponding to the power generation phase modulation working conditions comprise at least one of a power generation phase modulation test, a phase modulation power generation test and a power generation phase modulation shutdown test; the stage test items corresponding to the pumping working conditions comprise at least one of pumping shutdown tests and pumping power generation tests; the phase test items corresponding to the pumping phase modulation working condition comprise at least one of a start-up phase modulation test, a pumping phase modulation shutdown test, a phase modulation pumping test and a pumping phase modulation test; the accident shutdown test comprises at least one of a load reduction shutdown test and a load dump shutdown test;

And executing each stage test item in turn according to the stage test set corresponding to the current working condition test item.

5. The method of claim 4, wherein the step of sequentially executing each step test item according to the step test set corresponding to the current operation test item specifically comprises:

acquiring a testing step set matched with the current stage test item according to the stage test set corresponding to the current working condition test item; wherein the set of test steps includes a plurality of test steps;

and executing each test step in turn according to the test step set matched with the test item in the current stage.

6. The method according to claim 5, wherein each of the test steps is performed sequentially according to the test step set of the current stage test item matching, specifically comprising:

acquiring a first testing step set corresponding to a current stage test item and a second testing step set corresponding to a pre-stage test item; the pre-stage test item is a stage test item adjacent to and before the current stage test item;

acquiring the same test steps in the first test step set and the second test step set, and deleting the same test steps in the first test step set;

And executing each testing step in sequence according to the first testing step set deleted by the same testing step.

7. The method according to claim 1, wherein the sequentially executing each of the operating condition test items according to the operating condition test sequence specifically includes:

and according to the working condition test sequence, sequentially executing a start-up phase modulation test, a phase modulation pumping test, a pumping power generation test, a power generation phase modulation test and a power generation phase modulation shutdown test.

8. An operation testing device for a pumped storage unit, comprising:

the working condition test set acquisition module is used for acquiring a working condition test set of the pumped storage unit; the working condition test set comprises a plurality of working condition test items, wherein the working condition test items comprise a power generation working condition, a power generation phase modulation working condition, a water pumping phase modulation working condition and an accident shutdown working condition;

the working condition test item execution module is used for acquiring a working condition test sequence corresponding to the working condition test set and sequentially executing each working condition test item according to the working condition test sequence;

and the test result acquisition module is used for acquiring the operation test result of the pumped storage unit according to the test result of each working condition test item.

9. An electronic device, the electronic device comprising:

at least one processor; and

a memory communicatively coupled to the at least one processor; wherein, the liquid crystal display device comprises a liquid crystal display device,

the memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the method of operation testing of the pumped-storage unit of any one of claims 1-7.

10. A computer readable storage medium storing computer instructions for causing a processor to perform the method of testing operation of the pumped-storage unit of any one of claims 1-7.