System and method for controlling unit frequency regulation with switching logic

Abstract

The present disclosure provides a system and method for controlling the frequency adjustment of a unit by using switching logic, which comprises an industrial computer and a speed control device; the industrial computer is used to obtain the operating mode of the speed regulator of a hydroelectric generating unit, the operating mode comprising a grid-related test mode and a normal operating mode, and when the speed regulator of the hydroelectric generating unit is in the grid-related test mode, the target unit frequency input through the input window of the industrial computer is obtained; the speed control device is used to collect the real-time unit frequency of the hydroelectric generating unit when the speed regulator of the hydroelectric generating unit is in the normal operating mode, obtain the target unit frequency sent by the industrial computer when the speed regulator of the hydroelectric generating unit is in the grid-related test mode, and obtain the guide vane opening of the speed regulator of the hydroelectric generating unit under the corresponding frequency difference according to the real-time unit frequency, the target unit frequency and the set frequency, so as to meet the different frequency adjustment requirements during the grid-related test of the hydroelectric generating unit. According to the system of the present disclosure, the problem of low system safety during the existing grid-related dynamic test process is solved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of hydroelectric power generation, and particularly relates to a system and method for controlling frequency adjustment of a unit by using switching logic. BACKGROUND

[0002] The hydraulic turbine governor is a very important control unit of the hydroelectric generating unit, and the control effect of the governor directly affects the safe and stable operation of the hydroelectric generating unit. The newly built unit or the unit after the governor is reformed needs to be retested, such as primary frequency modulation and governor modeling test. During the test process, the frequency signal is generally simulated by the hydraulic turbine speed regulation system test simulator (the current commonly used model is GTS_TG or TG2000), and the frequency signal is a relatively low voltage signal. Since the test includes dynamic test, the actual frequency signal needs to be switched online with the simulator frequency signal. Since the voltage level of the actual frequency signal is much higher than that of the simulator frequency signal, there is a great risk in the test process. Once the switching step is wrong, the simulation instrument channel is burned out, or the hydroelectric generating unit is tripped, which seriously affects the safe operation of the unit. Therefore, the safety of the system needs to be improved during the existing test process of grid-connected frequency modulation. SUMMARY

[0003] The present disclosure aims to at least solve one of the technical problems in the related art to some extent.

[0004] To this end, the present disclosure provides a system and method for controlling frequency adjustment of a unit by using switching logic, which mainly aims to solve the problem of low system safety in the existing grid-connected dynamic test process.

[0005] According to a first aspect of the embodiments of the present disclosure, a system for controlling frequency adjustment of a unit by using switching logic is provided, which comprises an industrial computer and a speed control device.

[0006] The industrial computer is configured to obtain an operation mode of a hydroelectric generating unit governor, the operation mode comprising a grid-connected test mode and a normal operation mode, and obtain a target unit frequency input through an input window of the industrial computer when the hydroelectric generating unit governor is in the grid-connected test mode.

[0007] The speed regulation control device is configured to, when the hydroelectric generating set speed regulator is in the normal operation mode, collect a real-time unit frequency and a set frequency of the hydroelectric generating set, when the hydroelectric generating set speed regulator is in the grid-related test mode, obtain the set frequency and the target unit frequency sent by the industrial computer, and obtain the guide vane opening degree of the hydroelectric generating set speed regulator corresponding to a frequency difference based on the real-time unit frequency, the target unit frequency and the set frequency, and adjust the hydroelectric generating set speed regulator based on the guide vane opening degree, so as to meet different frequency regulation requirements when the hydroelectric generating set speed regulator is in the normal operation mode and the grid-related test mode, and the set frequency is equal to 50 Hz.

[0008] In one embodiment of the present disclosure, the industrial computer is further configured to: obtain a mode request instruction and send the mode request instruction to the speed regulation control device, receive a mode switching instruction from the speed regulation control device, determine the operation mode of the hydroelectric generating set speed regulator based on the received mode switching instruction, and control the hydroelectric generating set speed regulator to enter the corresponding operation mode.

[0009] In one embodiment of the present disclosure, before obtaining the mode request instruction, the industrial computer is further configured to: obtain a verification instruction, and determine whether the verification instruction is correct; if the verification instruction is correct, obtain the mode request instruction.

[0010] In one embodiment of the present disclosure, the speed regulation control device is further configured to: generate a mode switching instruction based on the received mode request instruction, wherein the mode request instruction includes a first request instruction for entering the grid-related test mode and a second request instruction for entering the normal operation mode, the mode switching instruction includes a first confirmation instruction for allowing to enter the grid-related test mode and a second confirmation instruction for allowing to enter the normal operation mode; and if the received mode request instruction is the second request instruction, the speed regulation control device obtains the target unit frequency and the set frequency in the grid-related test mode, and confirms whether to generate the second confirmation instruction based on the target unit frequency and the set frequency.

[0011] In one embodiment of the present disclosure, when confirming whether to generate the second confirmation instruction based on the target unit frequency and the set frequency, the speed regulation control device is specifically configured to: obtain a target frequency difference based on the target unit frequency and the set frequency, and generate the second confirmation instruction if the target frequency difference is less than a frequency difference threshold.

[0012] In one embodiment of the present disclosure, the industrial computer further includes a deviation input window configured to obtain an inherent dead zone compensation amount, and when the hydroelectric generating set speed regulator is in the grid-related test mode, the speed regulation control device obtains the guide vane opening degree of the hydroelectric generating set speed regulator based on the difference between the target unit frequency, the inherent dead zone compensation amount and the set frequency.

[0013] In one embodiment of the present disclosure, the industrial computer and the speed control device are connected by a network cable, and the communication protocol is MMS industrial communication protocol.

[0014] In one embodiment of the present disclosure, the system for controlling the frequency adjustment of the unit by using switching logic further comprises an interface device connected to the speed control device.

[0015] According to the second aspect of the present disclosure, a method for controlling the frequency adjustment of the unit by using switching logic is provided, which is applied to the system for controlling the frequency adjustment of the unit by using switching logic according to the first aspect of the present disclosure, and the method comprises:

[0016] obtaining the operation mode of the hydroelectric unit governor, wherein the operation mode comprises a grid-related test mode and a normal operation mode;

[0017] when the hydroelectric unit governor is in the grid-related test mode, obtaining the set frequency and the target unit frequency input through the input window of the industrial computer, wherein the set frequency is equal to 50 Hz;

[0018] when the hydroelectric unit governor is in the normal operation mode, collecting the set frequency and the real-time unit frequency of the hydroelectric unit, and when the hydroelectric unit governor is in the grid-related test mode, obtaining the target unit frequency sent by the industrial computer;

[0019] obtaining the guide vane opening degree of the hydroelectric unit governor under the corresponding frequency difference according to the real-time unit frequency, the target unit frequency and the set frequency, and adjusting the hydroelectric unit governor based on the guide vane opening degree to meet the different frequency adjustment requirements when the hydroelectric unit governor is in the normal operation mode and the grid-related test mode.

[0020] According to the third aspect of the present disclosure, an electronic device is further provided, which comprises at least one processor and a memory connected to the at least one processor in communication; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the method for controlling the frequency adjustment of the unit by using switching logic according to the second aspect of the present disclosure.

[0021] In one or more embodiments of the present disclosure, the industrial computer is configured to obtain an operation mode of a hydroelectric generating set governor, the operation mode including a grid-related test mode and a normal operation mode, and obtain a target generating set frequency input through an input window of the industrial computer when the hydroelectric generating set governor is in the grid-related test mode; and the speed control device is configured to, when the hydroelectric generating set governor is in the normal operation mode, collect a real-time generating set frequency and a set frequency of the hydroelectric generating set, and when the hydroelectric generating set governor is in the grid-related test mode, obtain the set frequency and the target generating set frequency sent by the industrial computer, and obtain a guide vane opening of the hydroelectric generating set governor corresponding to a frequency difference based on the real-time generating set frequency, the target generating set frequency and the set frequency, and adjust the hydroelectric generating set governor based on the guide vane opening to meet different frequency regulation requirements of the hydroelectric generating set governor in the normal operation mode and the grid-related test mode, and the set frequency is equal to 50 Hz. In this case, the industrial computer and the speed control device are used to participate in the test process, the industrial computer obtains the target generating set frequency when the hydroelectric generating set governor is in the grid-related test mode, and the speed control device collects the real-time generating set frequency of the hydroelectric generating set when the hydroelectric generating set governor is in the normal operation mode, and obtains the guide vane opening of the hydroelectric generating set governor corresponding to the frequency difference based on the target generating set frequency and the real-time generating set frequency, thereby meeting different requirements of the hydroelectric generating set in the grid-related dynamic test, solving the problem of low system safety in the existing grid-related dynamic test process, and also solving the problem of low safety of the system when the frequency signal source is switched in the existing grid-related dynamic test process.

[0022] Additional aspects and advantages of the present disclosure will be made apparent from the following description, which proceeds with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0023] The above and / or additional aspects and advantages of the present disclosure will become apparent and be readily appreciated from the following description, taken in conjunction with the accompanying drawings, in which:

[0024] Figure 1 A system block diagram for controlling frequency regulation of a generating set using switching logic is shown according to an embodiment of the present disclosure;

[0025] Figure 2 Another system block diagram for controlling frequency regulation of a generating set using switching logic is shown according to an embodiment of the present disclosure;

[0026] Figure 3 A flowchart of a method for controlling frequency regulation of a generating set using switching logic is shown according to an embodiment of the present disclosure;

[0027] Figure 4 A block diagram of an electronic device for implementing the method for controlling frequency regulation of a generating set using switching logic according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0028] The exemplary embodiments will be described in detail herein with reference to the attached drawings. The description of the embodiments below refers to the accompanying drawings, which show by way of example the exemplary embodiments. Unless defined otherwise, all technical and scientific terms and abbreviations used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The drawings are not to scale, and are intended for use only in conjunction with the description herein, and not to limit the scope of the disclosure. Unless otherwise specified, the description of a particular aspect or aspect includes any and all embodiments of the aspect, including equivalents thereof.

[0029] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present disclosure. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Also, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, different embodiments or examples described in the present specification and the features of different embodiments or examples can be combined and combined by those skilled in the art without contradiction.

[0030] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and should not be construed as indicating or implying relative importance or implying the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present disclosure, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited. It should also be understood that the term "and / or" used in the present disclosure means and includes any or all possible combinations of one or more associated listed items.

[0031] The embodiments of the present disclosure are described in detail below, examples of which are shown in the accompanying drawings, in which the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present disclosure, and cannot be understood as limiting the present disclosure.

[0032] In the first embodiment, Figure 1 A system block diagram for controlling frequency regulation of a unit using switching logic is shown. The system for controlling frequency regulation of a unit using switching logic of the present disclosure is suitable for grid-involved dynamic test of a hydroelectric unit. The grid-involved dynamic test includes various operating modes, and the operating mode is the mode of the hydroelectric unit. Since the speed governor of the hydroelectric unit is mainly tested for frequency regulation during the grid-involved dynamic test, the operating mode can also be considered as the mode of the speed governor of the hydroelectric unit. For example, Figure 1As shown, the system 10 for controlling the frequency adjustment of the unit by using the switching logic comprises a computer 11 and a speed control device 12. The computer 11 is connected to the speed control device 12.

[0033] In the embodiment, the computer 11 is configured to acquire the operation mode of the speed regulator of the hydroelectric generating unit, the operation mode comprising a grid-related test mode and a normal operation mode, and acquire the target unit frequency input through the input window of the computer when the speed regulator of the hydroelectric generating unit is in the grid-related test mode.

[0034] In the embodiment, the computer 11 acquires the operation mode of the speed regulator of the hydroelectric generating unit specifically by acquiring a mode request instruction and sending the mode request instruction to the speed control device 12, receiving a mode switching instruction from the speed control device 12, determining the operation mode of the speed regulator of the hydroelectric generating unit based on the received mode switching instruction, and controlling the speed regulator of the hydroelectric generating unit to enter the corresponding operation mode.

[0035] In the embodiment, the computer 11 comprises a touch display screen, and the touch display screen is provided with a computer input window for inputting the target unit frequency.

[0036] In the embodiment, the target unit frequency is different for different operation modes. If the speed regulator of the hydroelectric generating unit is in the grid-related test mode in the current state, the target unit frequency is the set input frequency value of the computer. The set input frequency value is the unit frequency required for the test, and the set input frequency value can be set or modified through the touch display screen. If the speed regulator of the hydroelectric generating unit is in the normal operation mode in the current state, the target unit frequency is the real-time unit frequency. The real-time unit frequency can be obtained by detecting the PT (i.e. the voltage transformer of the unit), and the computer input window tracks the real-time frequency value detected by the PT in real time.

[0037] In some embodiments, the touch display screen is provided with an instruction input window for inputting the mode request instruction. In other embodiments, the touch display screen can be provided with a mode button for generating the mode request instruction by operating the mode button. In this case, the required mode request instruction can be obtained through the instruction input window or the mode button, so that the computer can switch the speed regulator of the hydroelectric generating unit between the grid-related test mode and the normal operation mode through the touch display screen.

[0038] In some embodiments, the computer 11 is configured to acquire a verification instruction before acquiring the mode request instruction, and determine whether the verification instruction is correct. If the verification instruction is correct, the computer 11 acquires the mode request instruction.

[0039] In some embodiments, the verification instruction can adopt a password sequence. After the industrial computer 11 obtains the password sequence, the industrial computer 11 judges the password sequence. If the password sequence is correct, the input mode request instruction is allowed to be input in the instruction input window or the operation mode button is allowed to be operated, so that the industrial computer 11 obtains the mode request instruction. Thus, the abnormal operation of the hydroelectric generating set caused by the random mode switching of the human being can be avoided. The password sequence can be known only by the professional technical personnel, for example.

[0040] In some embodiments, considering the grid-involved test mode, in the prior art, the frequency of the test simulator added to the speed regulation control system through the frequency measurement module, so that the frequency data actually obtained by the speed regulation control system deviates from the frequency actually generated by the test simulator due to the accuracy of the frequency measurement module. The target unit frequency provided by the industrial computer 11 does not need to pass through the frequency measurement module, and the part of the deviation (i.e. the frequency error) needs to be considered. At this time, the industrial computer 11 further includes a deviation input window, which can also be arranged on the touch display screen. The deviation input window is used to input the inherent dead zone compensation amount, i.e. the inherent dead zone compensation amount is obtained through the deviation input window. The inherent dead zone compensation amount can be tested when the hydroelectric generating set is in a static state. The inherent dead zone compensation amount is the frequency error, for example.

[0041] When the speed regulator of the hydroelectric generating set is in the grid-involved test mode, the industrial computer 11 also transmits the inherent dead zone compensation amount to the speed control device 12, so that the speed control device 12 automatically compensates through logic, realizes the simulation of the addition of the frequency signal of the unit (the frequency signal generated by the test simulator) by the industrial computer 11, and makes the speed control device 12 generate a reliable action output result (e.g. more accurately calculates the corresponding frequency difference).

[0042] In the embodiment, the industrial computer 11 and the speed control device 12 are connected by a network cable, and the communication protocol adopts the MMS (Microsoft Media Server Protocol, streaming media transmission protocol) industrial communication protocol. Thus, the human-computer interaction data can be conveniently transmitted through the communication protocol.

[0043] In the embodiment, the speed control device 12 is used to generate a mode switching instruction based on the received mode request instruction. The mode request instruction includes a first request instruction for entering the grid-involved test mode and a second request instruction for entering the normal operation mode. The mode switching instruction includes a first confirmation instruction for allowing the grid-involved test mode to be switched in and a second confirmation instruction for allowing the normal operation mode to be switched in. If the received mode request instruction is the second request instruction, the speed control device obtains the target unit frequency and the set frequency in the grid-involved test mode, and confirms whether the second confirmation instruction is generated based on the target unit frequency and the set frequency.

[0044] In the embodiment, if the received mode request instruction is the second request instruction, it indicates that the current state of the hydroelectric generating set governor is the grid test mode, and it is required to switch into the normal operation mode. At this time, the speed control device 12 obtains the target frequency difference based on the target generating set frequency and the set frequency. If the target frequency difference is less than the frequency difference threshold, the second confirmation instruction is generated. The set frequency is 50 Hz. In addition, the mode switching instruction also includes the third confirmation instruction for prohibiting switching. If the target frequency difference is greater than or equal to the frequency difference threshold, the speed control device 12 generates the third confirmation instruction. After the industrial computer 11 receives the third confirmation instruction, the prompt of the frequency difference being too large to modify the target generating set frequency is output. The target generating set frequency in the industrial computer 11 is adjusted according to the real-time generating set frequency (for example, the target generating set frequency can be equal to the real-time generating set frequency), so that the hydroelectric generating set governor in the grid test mode is operated at the modified target generating set frequency, and then the second request instruction is obtained through the industrial computer 11. In this way, the disturbance-free switching from the grid test mode to the normal operation mode can be realized, and the safe operation of the generating set is ensured.

[0045] In the embodiment, the speed control device 12 is used to collect the real-time generating set frequency and the set frequency of the hydroelectric generating set when the hydroelectric generating set governor is in the normal operation mode, and to obtain the set frequency and the target generating set frequency sent by the industrial computer when the hydroelectric generating set governor is in the grid test mode. The guide vane opening of the hydroelectric generating set governor under the corresponding frequency difference is obtained based on the real-time generating set frequency, the target generating set frequency and the set frequency. The hydroelectric generating set governor is adjusted based on the guide vane opening, so as to meet the different frequency regulation requirements of the hydroelectric generating set governor in the normal operation mode and the grid test mode. When the hydroelectric generating set governor is in the normal operation mode, the speed control device 12 obtains the guide vane opening of the hydroelectric generating set governor corresponding to the actual frequency difference according to the set frequency and the real-time generating set frequency, so as to meet the primary frequency regulation response of the power grid. When the hydroelectric generating set governor is in the grid test mode, the speed control device 12 obtains the guide vane opening of the hydroelectric generating set governor under the test frequency difference according to the set frequency and the target generating set frequency, so as to meet the different frequency regulation requirements of the hydroelectric generating set in the grid dynamic test.

[0046] Specifically, when the hydroelectric generating set governor is in the normal operation mode, the speed control device 12 calculates a first frequency difference between the set frequency and the real-time unit frequency, obtains a first guide vane opening degree required by the hydroelectric generating set governor based on the first frequency difference, and calculates a first primary frequency modulation component of the guide vane control according to the first guide vane opening degree, and performs normal primary frequency modulation response to the hydroelectric generating set based on the first primary frequency modulation component. When the hydroelectric generating set governor is in the grid test mode, the speed control device 12 calculates a second frequency difference between the set frequency and the target unit frequency, obtains a second guide vane opening degree required by the hydroelectric generating set governor based on the second frequency difference, and calculates a second primary frequency modulation component of the guide vane control according to the second guide vane opening degree, and performs the grid test to the hydroelectric generating set based on the second primary frequency modulation component. If the target unit frequency is less than the set frequency, the corresponding guide vane opening degree corresponding to the frequency difference is positive, and then is superimposed on the original opening degree of the hydroelectric generating set governor. If the real-time unit frequency or the target unit frequency is greater than the set frequency, the corresponding guide vane opening degree corresponding to the frequency difference is negative, and then is superimposed on the original opening degree of the hydroelectric generating set governor.

[0047] In some embodiments, when the hydroelectric generating set governor is in the grid test mode, the speed control device 12 can also obtain the guide vane opening degree of the hydroelectric generating set governor based on the difference between the target unit frequency, the inherent dead zone compensation and the set frequency, so as to meet different frequency modulation requirements during the grid dynamic test of the hydroelectric generating set.

[0048] In some embodiments, a controller can be arranged inside the speed control device 12, and the controller realizes the whole process control of the hydroelectric generating set governor through a programming language. The whole process control includes, for example, the generation of the mode switching instruction in the above switching mode and the control of the grid dynamic test. In other words, the mode switching of the hydroelectric generating set governor and the completion of the grid dynamic test are realized by adding the frequency switching logic inside the speed control device 12. The programming language is, for example, C language, and the frequency switching logic is added inside the speed control device 102 by using the C language as a programming tool. Thus, when the mode request instruction is input at the industrial computer 11, the speed control device 102 judges and feeds back to the industrial computer 11 by using the frequency switching logic, so that the test personnel can switch the hydroelectric generating set governor to be in the grid test mode or the normal operation mode through the industrial computer screen (i.e. the industrial computer touch display screen).

[0049] In some embodiments, an integrated input / output card can also be arranged inside the speed control device 12, and the input / output card is used to collect the real-time unit frequency of the hydroelectric generating set when the hydroelectric generating set governor is in the normal operation mode. The input / output card is also used to output the control instruction, so as to respond to the normal operation mode and the grid test mode by using the guide vane of the hydroelectric generating set.

[0050] Figure 2Another system diagram for controlling frequency adjustment of a unit by using switching logic is shown in the embodiments of the present disclosure. As shown in Figure 2 The system 10 for controlling frequency adjustment of a unit by using switching logic also includes an interface device 13. The interface device 13 is connected to the speed control device 12.

[0051] In some embodiments, the interface device 13 may, for example, adopt an input and output terminal. The speed control device 12 and the input and output terminal can be connected by a plurality of copper core wires. In this case, the signals in the input and output terminal are led out by the plurality of copper core wires, which can facilitate the on-site access of the equipment state signals or the output of the control equipment signals of the hydroelectric unit. For example, the input and output terminal is connected to a display screen, and the equipment state signals or the output of the control equipment signals are displayed on the display screen.

[0052] In some embodiments, the specific adjustment process of the system for controlling frequency adjustment of a unit by using switching logic is as follows:

[0053] When the hydroelectric unit is static, the precision of the frequency measurement module is tested by using a turbine speed regulation system test simulator, and the difference between the frequency signal of the simulator added to the unit and the signal collected by the speed control device (the frequency signal of the simulator obtained by the speed control device) is obtained + 0.01 Hz, and the inherent dead zone compensation (i.e. the frequency error is 0.01 Hz) is written into the deviation input window;

[0054] If the tester is ready to perform a network test mode, first input a password in the industrial computer 11, if the password is correct, input a first request instruction for entering the network test mode, the speed control device 12 returns a first confirmation instruction for allowing to enter the network test mode based on the first request instruction, and the industrial computer 11 controls the hydroelectric unit governor to enter the network test mode based on the first confirmation instruction;

[0055] The industrial computer 11 confirms that the hydroelectric unit governor enters the network test mode based on the first confirmation instruction, and then sets the unit frequency required for the test through the industrial computer touch screen, i.e. inputs a target unit frequency through the input window of the industrial computer, and sends the target unit frequency to the speed control device 12, for example, the target unit frequency is 49.8 Hz;

[0056] The speed regulation control device 12 calculates the guide vane opening degree based on the received target unit frequency, specifically, the speed regulation control device 12 calculates the corresponding guide vane opening degree by calculating the frequency difference, and further obtains the primary frequency modulation component of the guide vane control, wherein when calculating, the speed regulation control device 12 sets the frequency as 50 Hz, sets the frequency deviation coefficient as 4%, and sets the primary frequency modulation dead zone as 0.05 Hz, so as to obtain the effective primary frequency modulation of 0.14 Hz (i.e. the frequency difference is 0.14 Hz) by using the set frequency 50 Hz minus the target unit frequency 49.8 Hz, minus the frequency error 0.01 Hz, and minus the primary frequency modulation dead zone 0.05. According to the frequency deviation coefficient calculation formula, the guide vane action value is 7%. Compared with using the water turbine speed regulation system test simulator to generate a 49.8 Hz signal, similarly, the effective primary frequency modulation is the set frequency 50 Hz minus the target unit frequency 49.8 Hz, minus the frequency error 0.01 Hz, and minus the primary frequency modulation dead zone 0.05, so as to obtain the guide vane action value of 7%. Based on the data, it can be known that the input signal of the industrial computer can completely replace the water turbine speed regulation system test simulator.

[0057] After the grid involvement test is completed, the value of the input window of the industrial computer is changed to 50 Hz, and the deviation setting window input is 0 Hz. At this time, the second request instruction for entering the normal operation mode is input at the industrial computer 11, and the speed regulation control device 12 calculates the target unit frequency in the current grid involvement test mode based on the second request instruction. At this time, the target unit frequency is 50 Hz, and the speed regulation control device 12 obtains the target frequency difference based on the target unit frequency and the set frequency. If the target frequency difference is less than the frequency difference threshold, a second confirmation instruction is generated, and the industrial computer 11 controls the water turbine generator speed regulator to enter the normal operation mode based on the second confirmation instruction. At this time, the system can realize disturbance-free switching, and exit the login.

[0058] In the system for controlling frequency adjustment of a unit by switching logic according to the embodiment of the present disclosure, the industrial computer is configured to acquire an operation mode of a governor of a hydroelectric generating unit, the operation mode including a grid-related test mode and a normal operation mode, and acquire a target unit frequency input through an input window of the industrial computer when the governor of the hydroelectric generating unit is in the grid-related test mode; and the speed control device is configured to acquire a real-time unit frequency and a set frequency of the hydroelectric generating unit when the governor of the hydroelectric generating unit is in the normal operation mode, acquire the set frequency and the target unit frequency sent by the industrial computer when the governor of the hydroelectric generating unit is in the grid-related test mode, and obtain a guide vane opening of the governor of the hydroelectric generating unit corresponding to a frequency difference based on the real-time unit frequency, the target unit frequency and the set frequency, and adjust the governor of the hydroelectric generating unit based on the guide vane opening to meet different frequency adjustment requirements of the governor of the hydroelectric generating unit in the normal operation mode and the grid-related test mode, and the set frequency is equal to 50 Hz. In this case, the industrial computer and the speed control device are involved in the test process, the industrial computer acquires the target unit frequency when the governor of the hydroelectric generating unit is in the grid-related test mode, and the speed control device acquires the real-time unit frequency of the hydroelectric generating unit when the governor of the hydroelectric generating unit is in the normal operation mode, and obtains the guide vane opening of the governor of the hydroelectric generating unit corresponding to the frequency difference based on the target unit frequency and the real-time unit frequency, thereby meeting different requirements of the hydroelectric generating unit in the grid-related dynamic test, solving the problem of low system safety in the existing grid-related dynamic test process, and also solving the problem of low safety of the system when switching the frequency signal source in the existing grid-related dynamic test process. In addition, if the grid-related test mode is put into operation, the frequency accepted by the governor is derived from the value of the input window of the industrial computer, at this time, the unit frequency is forcibly changed, the speed control device obtains a primary frequency control component through calculation, and completes the primary frequency adjustment and modeling test of the governor of the hydroelectric generating unit, thereby avoiding the risk of burning of the simulation instrument channel or tripping of the hydroelectric generating unit due to the step error of switching the signal source in the test process, and maximizing the safety of the unit in the test process.

[0059] The following is an embodiment of the method of the present disclosure. For details not disclosed in the embodiment of the method of the present disclosure, please refer to the system embodiment of the present disclosure. The method embodiment of the present disclosure proposes a method for controlling frequency adjustment of a unit by switching logic. The method for controlling frequency adjustment of a unit by switching logic uses the system for controlling frequency adjustment of a unit by switching logic in the above-mentioned system embodiment to perform unit frequency adjustment.

[0060] Figure 3 A flowchart of a method for controlling frequency adjustment of a unit by switching logic according to an embodiment of the present disclosure is shown.

[0061] As shown in Figure 3 , the method for controlling frequency adjustment of a unit by switching logic includes:

[0062] S101, obtain an operation mode of the hydroelectric generating set governor, the operation mode including a grid-related test mode and a normal operation mode;

[0063] S102, when the hydroelectric generating set governor is in the grid-related test mode, obtain a set frequency and a target generating set frequency input through an input window of an industrial computer, the set frequency being equal to 50 Hz;

[0064] S103, when the hydroelectric generating set governor is in the normal operation mode, collect a set frequency and a real-time generating set frequency of the hydroelectric generating set, and when the hydroelectric generating set governor is in the grid-related test mode, obtain a target generating set frequency set by the industrial computer;

[0065] S104, obtain a guide vane opening of the hydroelectric generating set governor under a corresponding frequency difference according to the real-time generating set frequency, the target generating set frequency and the set frequency, and adjust the hydroelectric generating set governor based on the guide vane opening, so as to meet different frequency regulation requirements when the hydroelectric generating set governor is in the normal operation mode and the grid-related test mode.

[0066] For details, refer to the related description in the system embodiment above, which will not be repeated here.

[0067] It should be noted that the foregoing explanation and description of the system embodiment for controlling the generating set frequency adjustment by using the switching logic also applies to the method for controlling the generating set frequency adjustment by using the switching logic of the embodiment, which will not be repeated here.

[0068] The serial numbers of the embodiments of the present disclosure above are only for description, and do not represent the advantages and disadvantages of the embodiments.

[0069] In the method for controlling frequency adjustment of a unit by switching logic in the present disclosure, an operation mode of a hydroelectric unit governor is acquired, and the operation mode includes a grid-related test mode and a normal operation mode; when the hydroelectric unit governor is in the grid-related test mode, a set frequency and a target unit frequency input through an input window of an industrial computer are acquired, and the set frequency is equal to 50 Hz; when the hydroelectric unit governor is in the normal operation mode, a real-time unit frequency of the hydroelectric unit and the set frequency are acquired, and when the hydroelectric unit governor is in the grid-related test mode, a target unit frequency set by the industrial computer is acquired; the guide vane opening of the hydroelectric unit governor under a corresponding frequency difference is acquired according to the real-time unit frequency, the target unit frequency and the set frequency, and the hydroelectric unit governor is adjusted based on the guide vane opening, so as to meet different frequency adjustment requirements when the hydroelectric unit governor is in the normal operation mode and the grid-related test mode. In this case, the industrial computer and the speed control device are used to participate in the test process, the industrial computer acquires the target unit frequency when the hydroelectric unit governor is in the grid-related test mode, the speed control device acquires the real-time unit frequency of the hydroelectric unit when the hydroelectric unit governor is in the normal operation mode, and the guide vane opening of the hydroelectric unit governor under the corresponding frequency difference is acquired according to the real-time unit frequency, the target unit frequency and the set frequency, so as to meet different requirements of the hydroelectric unit during the grid-related dynamic test, solve the problem of low system safety in the existing grid-related dynamic test process, and also solve the problem of low safety of the system during the frequency signal source switching in the existing grid-related dynamic test process. In addition, if the grid-related test mode is put into operation, the frequency accepted by the governor is derived from the value of the input window of the industrial computer, at this time, the unit frequency is forcibly changed, the speed control device obtains a primary frequency control component through calculation, and the primary frequency control of the hydroelectric unit governor and the modeling test of the governor are completed, so that the risk of burning of the simulation instrument channel or tripping of the hydroelectric generator unit caused by the step error of the signal source switching in the test process can be avoided, and the safe operation of the unit during the test process can be maximized.

[0070] According to the embodiments of the present disclosure, the present disclosure further provides an electronic device, a readable storage medium and a computer program product.

[0071] Figure 4 is a block diagram of an electronic device for implementing the method for controlling frequency adjustment of a unit by switching logic in the embodiments of the present disclosure.

[0072] Electronic devices are intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. Electronic devices can also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable electronic devices, and other similar computing devices. The components, connections and relationships between components, and functions shown in this disclosure are merely illustrative and are not intended to limit the implementation of this disclosure as described and / or claimed.

[0073] like Figure 4 As shown, the electronic device 20 includes a computing unit 21, which can perform various appropriate actions and processes based on a computer program stored in a read-only memory (ROM) 22 or a computer program loaded from a storage unit 28 into a random access memory (RAM) 23. The RAM 23 may also store various programs and data required for the operation of the electronic device 20. The computing unit 21, ROM 22, and RAM 23 are interconnected via a bus 24. An input / output (I / O) interface 25 is also connected to the bus 24.

[0074] Multiple components in electronic device 20 are connected to I / O interface 25, including: input unit 26, such as keyboard, mouse, etc.; output unit 27, such as various types of monitors, speakers, etc.; storage unit 28, such as disk, optical disk, etc., which is communicatively connected to computing unit 21; and communication unit 29, such as network card, modem, wireless transceiver, etc. Communication unit 29 allows electronic device 20 to exchange information / data with other electronic devices through computer networks such as the Internet and / or various telecommunications networks.

[0075] The computing unit 21 can be various general and / or special purpose processing components having processing and computing capabilities. Some examples of the computing unit 21 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various specialized artificial intelligence (AI) computing chips, various computing units running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The computing unit 21 performs various methods and processes described above, such as performing the method of controlling a frequency regulation of a machine group with switching logic. For example, in some embodiments, the method of controlling a frequency regulation of a machine group with switching logic can be implemented as a computer software program tangibly embodied in a machine-readable medium, such as the storage unit 28. In some embodiments, part or all of the computer program can be loaded and / or installed onto the electronic device 20 via the ROM 22 and / or the communication unit 29. When the computer program is loaded onto the RAM 23 and executed by the computing unit 21, one or more steps of the method of controlling a frequency regulation of a machine group with switching logic described above can be performed. Alternatively, in other embodiments, the computing unit 21 can be configured to perform the method of controlling a frequency regulation of a machine group with switching logic by any other appropriate means, such as by means of firmware.

[0076] Various implementations of the systems and techniques described above in this disclosure can be realized in digital electronic circuitry, integrated circuitry, a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on a chip (SOC), a programmable logic electronic device (CPLD), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include implementation in one or more computer programs that are executable and / or interpretable on a programmable system including at least one programmable processor, which can be special or general purpose, coupled to receive data and instructions from, and to transmit data and instructions to, a storage system, at least one input device, and at least one output device.

[0077] Program code for carrying out methods of the present disclosure can be written in any combination of one or more programming languages. The program code can be provided to a processor or controller of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the program code, when executed by the processor or controller, produces the functions / operations specified in the flowcharts and / or the block diagrams. The program code can be executed entirely on a machine, partially on a machine, partially on a machine as a stand-alone software package, partially on a machine and partially on a remote machine or entirely on a remote machine or server.

[0078] In this disclosure, a machine-readable medium can be a tangible medium that contains or stores a program for use by or in connection with an instruction execution system, apparatus, or electronic device. The machine-readable medium can be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium can include but is not limited to an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or electronic device, or any suitable combination of the foregoing. More specific examples of the machine-readable storage medium would include a lined- up electrical connection, 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.

[0079] To provide for interaction with a user, the systems and techniques described here can be implemented on a computer having a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user and a keyboard and a pointing device (e.g., a mouse or a trackball) by which the user can provide input to the computer. Other kinds of devices can be used to provide for interaction with a user as well; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form, including acoustic, speech, or tactile input.

[0080] The systems and techniques described here can be implemented in a computing system that includes a back end 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 back end, 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 a local area network (LAN), a wide area network (WAN), the Internet, and a blockchain network.

[0081] The computer system can include clients and servers. This relationship can be. The servers are generally remote from the users and can be accessed via the Internet using a communication network. The relationship can be a client-server relationship over a communications network, and as such, the servers can be accessed by the clients using computer programs. The servers can be cloud servers, also known as cloud computing servers or cloud hosts, which are mainframe products in the cloud computing service system, and solve the defects of large management difficulty and weak business scalability in traditional physical hosts and VPS services (Virtual Private Server, or VPS for short). The servers can also be servers of a distributed system, or servers combined with a blockchain.

[0082] The structural schematic diagram according to the disclosed embodiments of the present application is shown in the accompanying drawings. These drawings are not drawn to scale, in which some details are exaggerated for the purpose of clear expression, and some details can be omitted. The shapes of various regions, layers and their relative size and positional relationship shown in the drawings are only exemplary, and in actuality, there can be deviations due to manufacturing tolerances or technical limitations, and a person skilled in the art can additionally design regions / layers with different shapes, sizes and relative positions according to actual needs.

[0083] It should be understood that the above-mentioned various forms of flow can be reordered, added or deleted. For example, the steps described in the present disclosure can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solutions disclosed in the present disclosure can be achieved, and the present disclosure is not limited herein.

[0084] The above detailed description does not constitute a limitation on the protection scope of the present disclosure. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present disclosure should be included in the protection scope of the present disclosure.

Claims

1. A system for controlling unit frequency regulation using switching logic, characterized in that, The system comprises an industrial computer and a speed control device. The industrial computer is configured to acquire an operation mode of a hydroelectric generating set governor, the operation mode comprising a grid test mode and a normal operation mode, and acquire a target generating set frequency input through an input window of the industrial computer when the hydroelectric generating set governor is in the grid test mode. The speed control device is configured to acquire a real-time generating set frequency and a set frequency of the hydroelectric generating set when the hydroelectric generating set governor is in the normal operation mode, acquire the set frequency and the target generating set frequency sent by the industrial computer when the hydroelectric generating set governor is in the grid test mode, and obtain a guide vane opening degree of the hydroelectric generating set governor under a corresponding frequency difference based on the real-time generating set frequency, the target generating set frequency and the set frequency, and adjust the hydroelectric generating set governor based on the guide vane opening degree to meet different frequency regulation requirements of the hydroelectric generating set governor in the normal operation mode and the grid test mode, and the set frequency is equal to 50 Hz.

2. The system for controlling frequency regulation of a machine set with switching logic of claim 1, wherein, The industrial computer is further configured to: acquire a mode request instruction and send the mode request instruction to the speed control device, receive a mode switching instruction from the speed control device, determine the operation mode of the hydroelectric generating set governor based on the received mode switching instruction, and control the hydroelectric generating set governor to enter a corresponding operation mode.

3. The system for controlling frequency regulation of a machine set with switching logic of claim 2, wherein, Before acquiring the mode request instruction, the industrial computer is further configured to: acquire a verification instruction, and determine whether the verification instruction is correct, and if the verification instruction is correct, acquire the mode request instruction.

4. The system for controlling frequency regulation of a machine set with switching logic of claim 2, wherein, The speed control device is further configured to: generate a mode switching instruction based on the received mode request instruction, wherein the mode request instruction comprises a first request instruction for entering the grid test mode and a second request instruction for entering the normal operation mode, and the mode switching instruction comprises a first confirmation instruction for allowing to enter the grid test mode and a second confirmation instruction for allowing to enter the normal operation mode; if the received mode request instruction is the second request instruction, the speed control device acquires the target generating set frequency and the set frequency in the grid test mode, and confirms whether to generate the second confirmation instruction based on the target generating set frequency and the set frequency.

5. The system for controlling frequency regulation of a machine set with switching logic of claim 4, wherein, When confirming whether to generate the second confirmation instruction based on the target generating set frequency and the set frequency, the speed control device is specifically configured to: obtain a target frequency difference based on the target generating set frequency and the set frequency, and generate the second confirmation instruction if the target frequency difference is less than a frequency difference threshold.

6. The system for controlling frequency regulation of a machine set with switching logic of claim 1, wherein, The industrial computer further comprises a deviation input window configured to acquire an inherent dead zone compensation amount, and the speed control device obtains the guide vane opening degree of the hydroelectric generating set governor based on the target generating set frequency, the inherent dead zone compensation amount and a difference between the set frequency when the hydroelectric generating set governor is in the grid test mode.

7. The system for controlling frequency regulation of a machine set with switching logic of claim 1, wherein, The industrial computer and the speed control device are connected by a network cable, and a communication protocol is an MMS industrial communication protocol.

8. The system for controlling frequency regulation of a machine set with switching logic of claim 1, wherein, The system further comprises an interface device connected to the speed control device.

9. A method for controlling the frequency of a unit using switching logic according to the system of any one of claims 1-8, characterized in that, The system comprises an industrial computer and a speed control device. Obtain an operation mode of a hydroelectric generating set governor, the operation mode including a grid test mode and a normal operation mode; When the hydroelectric generating set governor is in the grid test mode, obtain a set frequency equal to 50 Hz and a target generating set frequency input through an input window of an industrial computer; When the hydroelectric generating set governor is in the normal operation mode, collect a set frequency and a real-time generating set frequency of the hydroelectric generating set, and when the hydroelectric generating set governor is in the grid test mode, obtain the target generating set frequency sent by the industrial computer; According to the real-time generating set frequency, the target generating set frequency and the set frequency, obtain a guide vane opening degree of the hydroelectric generating set governor under a corresponding frequency difference, and adjust the hydroelectric generating set governor based on the guide vane opening degree to meet different frequency adjustment requirements when the hydroelectric generating set governor is in the normal operation mode and the grid test mode.

10. An electronic device, comprising: Comprise: At least one processor; And A memory in communication connection with the at least one processor; wherein The memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the method for adjusting the frequency of the generating set by switching the logic control according to claim 9.

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