Frequency adjustment method and device, equipment and storage medium

Abstract

The invention discloses a frequency adjusting method, device and equipment and a storage medium, and relates to the technical field of power electronics, the method is applied to each generator set forming a power generation system, and the method comprises the following steps: obtaining the current power generation frequency of the power generation system; under the condition that it is determined that the current power generation frequency exceeds the preset frequency range, after a waiting period is finished, the waiting power generation frequency of the power generation system is obtained, and the waiting period is determined according to the number of the generator set; and under the condition that the waiting power generation frequency exceeds the preset frequency range, frequency modulation is performed on the generator set according to the reference frequency, and the reference frequency is determined according to the frequency modulation capability of each generator set. According to the technical scheme, the sequence of adjusting the frequency of the power generation system by each generator set is determined according to the number of each generator set, staged adjustment of the frequency of the power generation system is achieved, communication between the generator sets is not needed, the influence of communication facilities on frequency adjustment of the power generation system is avoided, and the adjustment effect is improved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of power electronics technology, and in particular to a frequency regulation method, device, equipment and storage medium. Background Art

[0002] As an important renewable energy source, hydropower has developed rapidly in recent years. Affected by changes in water flow and load, the frequency of the hydropower system fluctuates frequently and is unstable. In the power system, frequency stability is the key to ensuring safe and reliable power supply. In order to prevent frequency fluctuations from affecting the normal operation of user equipment, the frequency of the hydropower system needs to be regulated.

[0003] In the prior art, one generator set in the hydropower system can be used as a master control node, and the other generator sets can be used as slave control nodes. The master control node controls the slave control nodes to achieve frequency regulation of the hydropower system.

[0004] However, the control of the slave node by the master node needs to rely on the communication between the master node and the slave node. The communication effect between the master node and the slave node is easily limited by the communication facilities. Therefore, the frequency regulation effect is not good. Summary of the invention

[0005] The present invention provides a frequency regulation method, device, equipment and storage medium, which realize frequency regulation of a power generation system without relying on other hardware facilities.

[0006] In a first aspect, an embodiment of the present invention provides a frequency regulation method, which is applied to each generator set constituting a power generation system, and the method includes:

[0007] Obtain the current power generation frequency of the power generation system;

[0008] In the case where it is determined that the current power generation frequency exceeds the preset frequency range, after the waiting period ends, obtaining the waiting power generation frequency of the power generation system, wherein the waiting period is determined according to the number of the generator set;

[0009] When it is determined that the waiting power generation frequency exceeds the preset frequency range, the generator set is frequency-regulated according to a reference frequency, wherein the reference frequency is determined according to the frequency regulation capability of each of the generator sets.

[0010] The technical solution of the embodiment of the present invention provides a frequency regulation method of a power generation system, which is applied to each generator set constituting the power generation system, and the method includes: obtaining the current power generation frequency of the power generation system; in the case of determining that the current power generation frequency exceeds the preset frequency range, after the waiting period ends, obtaining the waiting power generation frequency of the power generation system, wherein the waiting period is determined according to the number of the generator set; in the case of determining that the waiting power generation frequency exceeds the preset frequency range, frequency-modulating the generator set according to the reference frequency, wherein the reference frequency is determined according to the frequency modulation capability of each generator set. In the above technical solution, each generator set constituting the power generation system obtains the current power generation frequency of the power generation system in real time, determines whether the current power generation frequency exceeds the preset frequency range by comparing the current power generation frequency with the upper and lower frequency limits of the preset frequency range, enters the waiting period when it is determined that the current power generation frequency exceeds the preset frequency range, and after the waiting period ends, continues to obtain the waiting power generation frequency of the power generation system, determines whether the waiting power generation frequency exceeds the preset frequency range by comparing the waiting power generation frequency with the upper and lower frequency limits of the preset frequency range, and modulates the power generation set according to the reference frequency when it is determined that the waiting power generation frequency exceeds the preset frequency range. When it is determined that the current power generation frequency and the waiting power generation frequency after the waiting period determined according to the number of the generator set are both out of the preset frequency range, the generator set is frequency-adjusted, and the power generation system is further frequency-adjusted, so that the order in which each generator set adjusts the frequency of the power generation system is determined according to the number of each generator set, thereby realizing phased adjustment of the frequency of the power generation system. In addition, there is no need for communication between the generator sets, thereby avoiding the influence of communication facilities on the frequency adjustment of the power generation system and improving the adjustment effect.

[0011] Furthermore, obtaining the current power generation frequency of the power generation system includes:

[0012] The current power generation frequency of the power generation system is obtained based on a frequency monitor installed on the power generation set.

[0013] Furthermore, it also includes:

[0014] Determine the response time of each of the generator sets, and determine a basic regulation period according to each of the response times and a first preset time;

[0015] The waiting period of each of the generator sets is determined according to the number of each of the generator sets and the basic adjustment period.

[0016] Further, determining a basic adjustment period according to each of the response times and the first preset time includes:

[0017] If each of the response times is less than the first preset time, the maximum response time is determined as the basic adjustment period; otherwise, the first preset time is determined as the basic adjustment period.

[0018] Further, determining the waiting period of each of the generator sets according to the number of each of the generator sets and the basic adjustment period includes:

[0019] When it is determined that the number of the generator set is 1, the waiting period is determined to be 0;

[0020] When it is determined that the number of the generator set is not 1, an initial adjustment period is determined according to the basic adjustment period and the time deviation, and the waiting period is determined according to the initial adjustment period, the number and the basic adjustment period.

[0021] Further, when it is determined that the waiting power generation frequency exceeds the preset frequency range, the frequency of the generator set is adjusted according to the reference frequency, including:

[0022] When it is determined that the waiting power generation frequency is less than the lower frequency limit of the preset frequency range, increasing the frequency of the generator set based on the reference frequency;

[0023] When it is determined that the waiting power generation frequency is greater than the upper frequency limit of the preset frequency range, the frequency of the generator set is lowered based on the reference frequency.

[0024] Furthermore, after the generator set is frequency-regulated according to the reference frequency, the method further comprises:

[0025] After the second preset time, the process returns to the step of obtaining the current power generation frequency of the power generation system.

[0026] In a second aspect, an embodiment of the present invention further provides a frequency regulating device, which is installed in each generator set constituting a power generation system, and includes:

[0027] An acquisition module, used for acquiring the current power generation frequency of the power generation system;

[0028] An execution module, configured to obtain a waiting power generation frequency of the power generation system after a waiting period ends when it is determined that the current power generation frequency exceeds a preset frequency range, wherein the waiting period is determined according to the number of the power generation set;

[0029] The frequency modulation module is used to modulate the frequency of the generator set according to a reference frequency when it is determined that the waiting power generation frequency exceeds the preset frequency range, wherein the reference frequency is determined according to the frequency modulation capability of each of the generator sets.

[0030] In a third aspect, an embodiment of the present invention further provides an electronic device, the electronic device comprising:

[0031] at least one processor; and a memory communicatively coupled to the at least one processor;

[0032] The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can perform the frequency adjustment method as described in any one of the first aspects.

[0033] In a fourth aspect, an embodiment of the present invention further provides a storage medium comprising computer executable instructions, wherein the computer executable instructions, when executed by a computer processor, are used to execute the frequency adjustment method as described in any one of the first aspects.

[0034] In a fifth aspect, the present application provides a computer program product, which includes computer instructions. When the computer instructions are executed on a computer, the computer executes the frequency adjustment method provided in the first aspect.

[0035] It should be noted that the above computer instructions may be stored in whole or in part on a computer-readable storage medium, wherein the computer-readable storage medium may be packaged together with the processor of the frequency adjustment device, or may be packaged separately from the processor of the frequency adjustment device, which is not limited in this application.

[0036] The description of the second, third, fourth and fifth aspects in this application can refer to the detailed description of the first aspect; and the beneficial effects of the description of the second, third, fourth and fifth aspects can refer to the beneficial effect analysis of the first aspect, which will not be repeated here.

[0037] In this application, the name of the frequency adjustment device does not limit the device or functional module itself. In actual implementation, these devices or functional modules may appear with other names. As long as the functions of each device or functional module are similar to those of this application, they fall within the scope of the claims of this application and their equivalent technologies.

[0038] These and other aspects of the present application will become more apparent from the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0040] Figure 1 A flow chart of a frequency adjustment method provided by an embodiment of the present invention;

[0041] Figure 2 A flow chart of another frequency adjustment method provided by an embodiment of the present invention;

[0042] Figure 3 A flowchart of another frequency adjustment method provided by an embodiment of the present invention;

[0043] Figure 4 A schematic diagram of the structure of a frequency adjustment device provided by an embodiment of the present invention;

[0044] Figure 5 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0045] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0046] The term "and / or" in this article is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0047] The terms "first" and "second" and the like in the specification and drawings of this application are used to distinguish different objects, or to distinguish different processing of the same object, rather than to describe a specific order of objects.

[0048] In addition, the terms "including" and "having" and any variations thereof mentioned in the description of the present application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include other steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products or devices.

[0049] It should be mentioned before discussing exemplary embodiments in more detail that some exemplary embodiments are described as processes or methods depicted as flow charts. Although the flow charts describe various operations (or steps) as sequential processes, many operations therein can be implemented in parallel, concurrently or simultaneously. In addition, the order of various operations can be rearranged. The process can be terminated when its operation is completed, but can also have additional steps not included in the accompanying drawings. The process can correspond to methods, functions, procedures, subroutines, subprograms, etc. In addition, the embodiments in the present invention and the features in the embodiments can be combined with each other without conflict.

[0050] It should be noted that, in the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0051] In the description of the present application, unless otherwise specified, “plurality” means two or more.

[0052] Figure 1 A flow chart of a frequency regulation method provided in an embodiment of the present invention. This embodiment is applicable to situations where the frequency of a hydropower system needs to be regulated. The method is applied to each generator set constituting the power generation system. The method can be executed by a frequency regulation device, such as Figure 1 As shown, the specific steps include:

[0053] Step 110: Obtain the current power generation frequency of the power generation system.

[0054] The power generation system may be a hydropower system, which is composed of multiple generator sets. Each generator set is numbered from large to small according to the rated capacity, and the order of the numbers is the frequency adjustment order of the generator sets when the frequency fluctuates. The numbers may be 1, 2, 3..., n, where n is the number of generator sets included in the power generation system. When a new generator set is added to the power generation system, it is directly numbered starting from n+1.

[0055] Specifically, each generator set constituting the power generation system is equipped with a frequency monitor. Therefore, for the current generator set, the current power generation frequency of the power generation system can be obtained based on the frequency monitor equipped on the current generator set.

[0056] In the embodiment of the present invention, real-time monitoring of the current power generation frequency of the power generation system is achieved.

[0057] Step 120: When it is determined that the current power generation frequency exceeds a preset frequency range, after the waiting period ends, obtaining the waiting power generation frequency of the power generation system.

[0058] Wherein, the waiting period is determined according to the number of the generator set.

[0059] The preset frequency range can be understood as a frequency range that ensures the normal operation of the electrical equipment powered by the power generation system. For example, with 50 Hz as the reference frequency and 0.5 Hz as the margin, the preset frequency range can be 49.5 Hz to 50.5 Hz. If the current power generation frequency f satisfies 49.5 Hz ≤ f ≤ 50.5 Hz, it is determined that the current power generation frequency does not exceed the preset frequency range. Otherwise, it is determined that the current power generation frequency exceeds the preset frequency range.

[0060] Specifically, when it is determined that the current power generation frequency exceeds the preset frequency range, the frequency of the power generation system needs to be adjusted. For the generator sets constituting the power generation system, the frequency of the power generation system is adjusted based on a successive adjustment mechanism. Specifically, when any generator set determines that the current power generation frequency of the power generation system exceeds the preset frequency range, it randomly enters a waiting period, and after determining that the waiting period is over, it obtains the waiting power generation frequency of the power generation system again, and determines whether to adjust the frequency of the power generation system based on the generator set according to the waiting power generation frequency.

[0061] It should be noted that the waiting period is determined according to the number of the generator set, and when the number of the generator set is 1, the waiting period is 0, and when the number of the generator set is other, the waiting period is determined according to the number of the generator set.

[0062] In an embodiment of the present invention, when it is determined that the current power generation frequency exceeds the preset frequency range, the corresponding waiting period is determined according to the number of each generator set, and the waiting power generation frequency of the power generation system continues to be obtained after the waiting period ends, providing a data basis for determining whether to adjust the frequency of the power generation system based on each generator set.

[0063] Step 130: When it is determined that the waiting power generation frequency exceeds the preset frequency range, the generator set is frequency-adjusted according to a reference frequency.

[0064] Wherein, the reference frequency is determined according to the frequency regulation capability of each of the generator sets.

[0065] In order to ensure that all generator sets can participate in the frequency regulation of the power generation system, the reference frequency may be the lower limit of the frequency regulation capability of all generator sets.

[0066] Specifically, when it is determined that the waiting power generation frequency exceeds the preset frequency range, it indicates that the frequency of the power generation system needs to be adjusted based on the generator set. At this time, the generator set can be frequency-adjusted according to the reference frequency, thereby achieving frequency adjustment of the power generation system.

[0067] It should be noted that the waiting period of the generator set numbered 1 is 0, that is, when the generator set numbered 1 determines that the current power generation frequency exceeds the preset frequency range, it can immediately adjust the frequency of the generator set according to the reference frequency, thereby realizing frequency regulation of the power generation system.

[0068] In the embodiment of the present invention, based on the successive adjustment mechanism, the order in which the generator sets adjust the frequency of the power generation system is determined according to the numbers of the generator sets, thereby achieving phased adjustment of the frequency of the power generation system.

[0069] The frequency regulation method provided by the embodiment of the present invention is applied to each generator set constituting a power generation system, and the method includes: obtaining the current power generation frequency of the power generation system; in the case of determining that the current power generation frequency exceeds the preset frequency range, after the waiting period ends, obtaining the waiting power generation frequency of the power generation system, wherein the waiting period is determined according to the number of the generator set; in the case of determining that the waiting power generation frequency exceeds the preset frequency range, frequency-modulating the generator set according to the reference frequency, wherein the reference frequency is determined according to the frequency modulation capability of each generator set. In the above technical scheme, each generator set constituting the power generation system obtains the current power generation frequency of the power generation system in real time, determines whether the current power generation frequency exceeds the preset frequency range by comparing the current power generation frequency with the upper and lower frequency limits of the preset frequency range, enters the waiting period when it is determined that the current power generation frequency exceeds the preset frequency range, and after the waiting period ends, continues to obtain the waiting power generation frequency of the power generation system, determines whether the waiting power generation frequency exceeds the preset frequency range by comparing the waiting power generation frequency with the upper and lower frequency limits of the preset frequency range, and modulates the power generation set according to the reference frequency when it is determined that the waiting power generation frequency exceeds the preset frequency range. When it is determined that the current power generation frequency and the waiting power generation frequency after the waiting period determined according to the number of the generator set are both out of the preset frequency range, the generator set is frequency-adjusted, and the power generation system is further frequency-adjusted, so that the order in which each generator set adjusts the frequency of the power generation system is determined according to the number of each generator set, thereby realizing phased adjustment of the frequency of the power generation system. In addition, there is no need for communication between the generator sets, thereby avoiding the influence of communication facilities on the frequency adjustment of the power generation system and improving the adjustment effect.

[0070] Figure 2 This is a flow chart of another frequency adjustment method provided by an embodiment of the present invention. This embodiment is specific based on the above embodiment. Figure 2 As shown, in this embodiment, the method may further include:

[0071] Step 210: Determine the response time of each of the generator sets, and determine a basic regulation period according to each of the response times and a first preset time.

[0072] In one implementation, step 210 may specifically include:

[0073] If each of the response times is less than the first preset time, the maximum response time is determined as the basic adjustment period; otherwise, the first preset time is determined as the basic adjustment period.

[0074] Among them, the response time of the generator set can be understood as the time from the start of frequency modulation to the completion of frequency modulation, which can be determined by performing frequency modulation tests on the generator sets. By performing frequency modulation tests on each generator set, the response time t1, t2, t3, ... t n The first preset time may be 4 seconds.

[0075] Specifically, by comparing the response time of each generator set with the first preset time, if it is determined that each response time is less than the first preset time, the maximum response time among the response times can be determined as the basic regulation cycle; otherwise, the first preset time is determined as the basic regulation cycle.

[0076] In practical applications, the basic adjustment period can be determined based on Formula 1.

[0077]

[0078] Wherein, T represents the basic regulation period.

[0079] In the embodiment of the present invention, the basic regulation period is determined according to the response time of each generator set.

[0080] Step 220: Determine the waiting period of each of the generator sets according to the number of each of the generator sets and the basic adjustment period.

[0081] In one implementation, step 220 may specifically include:

[0082] When it is determined that the number of the generator set is 1, the waiting period is determined to be 0; when it is determined that the number of the generator set is not 1, the initial adjustment period is determined according to the basic adjustment period and the time deviation, and the waiting period is determined according to the initial adjustment period, the number and the basic adjustment period.

[0083] Among them, the time deviation can be understood as the frequency regulation lag time and frequency rise time of the generator set numbered 1, and the initial regulation period can be understood as the regulation period of the generator set numbered 1. In practical applications, the initial regulation period T0=T+2s can be determined.

[0084] Specifically, when the generator set is numbered 1, its waiting period can be determined to be 0. When the generator set is numbered not 1, the initial adjustment period can be determined according to the adjustment period and time deviation, and the waiting period can be determined according to the initial adjustment period, number and adjustment period.

[0085] In practical applications, the waiting period can be determined based on Formula 2.

[0086]

[0087] Wherein, Z represents the waiting period, and i represents the number of the generator set.

[0088] In the embodiment of the present invention, the waiting period of each generator set is determined according to the number of each generator set and the basic adjustment period.

[0089] Step 230: Obtain the current power generation frequency of the power generation system.

[0090] In one implementation, step 230 may specifically include:

[0091] The current power generation frequency of the power generation system is obtained based on a frequency monitor installed on the power generation set.

[0092] As mentioned above, the current power generation frequency of the power generation system may be acquired based on the frequency monitor installed on the power generation set.

[0093] In the embodiment of the present invention, real-time monitoring of the current power generation frequency of the power generation system is achieved.

[0094] Step 240: When it is determined that the current power generation frequency exceeds a preset frequency range, after the waiting period ends, the waiting power generation frequency of the power generation system is obtained.

[0095] Wherein, the waiting period is determined according to the number of the generator set.

[0096] Specifically, the current power generation frequency is compared with the upper and lower frequency limits of the preset frequency range. If the current power generation frequency is greater than the upper frequency limit of the preset frequency range, or the current power generation frequency is less than the lower frequency limit of the preset frequency range, it is determined that the current power generation frequency exceeds the preset frequency range; otherwise, it is determined that the current power generation frequency does not exceed the preset frequency range.

[0097] When it is determined that the current power generation frequency exceeds the preset frequency range, a waiting period is randomly entered, and after it is determined that the waiting period is over, the waiting power generation frequency of the power generation system is acquired again.

[0098] Step 250: When it is determined that the waiting power generation frequency exceeds the preset frequency range, the generator set is frequency-adjusted according to the reference frequency.

[0099] Wherein, the reference frequency is determined according to the frequency regulation capability of each of the generator sets.

[0100] In one implementation, step 250 may specifically include:

[0101] When it is determined that the waiting power generation frequency is less than the lower frequency limit of the preset frequency range, the frequency of the generator set is increased based on the reference frequency; when it is determined that the waiting power generation frequency is greater than the upper frequency limit of the preset frequency range, the frequency of the generator set is decreased based on the reference frequency.

[0102] Specifically, after obtaining the waiting power generation frequency, the waiting power generation frequency can be compared with the frequency upper limit and frequency lower limit of the preset frequency range. If the waiting power generation frequency is greater than the frequency upper limit of the preset frequency range, or the waiting power generation frequency is less than the frequency lower limit of the preset frequency range, it is determined that the waiting power generation frequency exceeds the preset frequency range; otherwise, it is determined that the waiting power generation frequency does not exceed the preset frequency range.

[0103] When it is determined that the waiting power generation frequency exceeds the preset frequency range, the generator set can be frequency-adjusted according to the reference frequency. Specifically, when it is determined that the waiting power generation frequency is less than the lower frequency limit of the preset frequency range, the frequency of the generator set is increased based on the reference frequency; when it is determined that the waiting power generation frequency is greater than the upper frequency limit of the preset frequency range, the frequency of the generator set is lowered based on the reference frequency, thereby achieving frequency regulation of the generator set and further achieving frequency regulation of the power generation system.

[0104] In the embodiment of the present invention, the order in which each generator set adjusts the frequency of the power generation system is determined according to the number of each generator set, so as to adjust the frequency of the power generation system in stages. Moreover, by adjusting the frequency of the power generation system in turn by multiple generator sets, not only the response is fast, but also after multiple rounds of adjustment, the frequency of the power generation system can always be restored to a normal range, thus avoiding the situation where the adjustment capacity of a single generator set is insufficient.

[0105] Step 260: After the second preset time, return to execute to obtain the current power generation frequency of the power generation system.

[0106] The frequency regulation of the generator set is delayed. Since the frequency regulation has a lag time due to inertia, the current power generation frequency obtained immediately after the frequency regulation has not been adjusted. Therefore, the current power generation frequency can be obtained after waiting for a second preset time to continue frequency monitoring of the power generation system. The second preset time can be set according to actual needs, for example, it can be set to 8 seconds.

[0107] Specifically, after the frequency of the generator set is adjusted, after waiting for the second preset time, the process returns to the step of acquiring the current power generation frequency of the power generation system to continue frequency monitoring of the power generation system.

[0108] In the embodiment of the present invention, by returning to execute obtaining the current power generation frequency of the power generation system after the second preset time, repeated adjustment of the power generation system frequency by the same generator set is avoided.

[0109] The frequency regulation method provided by the embodiment of the present invention includes: determining the response time of each generator set, determining the basic regulation cycle according to each response time and the first preset time; determining the waiting cycle of each generator set according to the number of each generator set and the basic regulation cycle; obtaining the current power generation frequency of the power generation system; in the case of determining that the current power generation frequency exceeds the preset frequency range, after the waiting cycle ends, obtaining the waiting power generation frequency of the power generation system; in the case of determining that the waiting power generation frequency exceeds the preset frequency range, adjusting the frequency of the generator set according to the reference frequency; after the second preset time, returning to execute the acquisition of the current power generation frequency of the power generation system. In the above technical scheme, each generator set constituting the power generation system obtains the current power generation frequency of the power generation system in real time, determines whether the current power generation frequency exceeds the preset frequency range by comparing the current power generation frequency with the upper and lower frequency limits of the preset frequency range, enters the waiting cycle when it is determined that the current power generation frequency exceeds the preset frequency range, and continues to obtain the waiting power generation frequency of the power generation system after the waiting cycle ends, determines whether the waiting power generation frequency exceeds the preset frequency range by comparing the waiting power generation frequency with the upper and lower frequency limits of the preset frequency range, and adjusts the frequency of the generator set according to the reference frequency when it is determined that the waiting power generation frequency exceeds the preset frequency range. When it is determined that the current power generation frequency and the waiting power generation frequency after the waiting period determined according to the number of the generator set are both out of the preset frequency range, the generator set is frequency-adjusted, and the power generation system is further frequency-adjusted, so that the order in which each generator set adjusts the frequency of the power generation system is determined according to the number of each generator set, and the frequency of the power generation system is adjusted in stages. By setting a waiting period for the generator set, the generator sets can stagger the frequency adjustment of the power generation system without communication, thereby reducing the overlap of frequency adjustment. The secondary frequency measurement operation of multiple generator sets is used to determine whether the current generator set is adjusted, and to verify the adjustment effects of other generator sets, which can prevent insufficient adjustment.

[0110] In addition, there is no need for communication between generator sets, which avoids the impact of communication facilities on the frequency regulation of the power generation system and improves the regulation effect.

[0111] Figure 3 The following is a flowchart of another frequency adjustment method provided in an embodiment of the present invention, which exemplarily provides one of the implementation methods. Figure 3 As shown,

[0112] Step 310: Obtain the current power generation frequency of the power generation system.

[0113] Step 320: Determine whether the current power generation frequency exceeds a preset frequency range.

[0114] If it is determined that the current power generation frequency exceeds the preset frequency range, step 330 is executed; otherwise, the process returns to step 310 .

[0115] Step 330: Enter a waiting period, and obtain the waiting power generation frequency of the power generation system after the waiting period.

[0116] Step 340: Determine whether the waiting power generation frequency exceeds a preset frequency range.

[0117] If it is determined that the current power generation frequency exceeds the preset frequency range, step 350 is executed; otherwise, the process returns to step 310 .

[0118] Step 350: Determine whether the waiting power generation frequency is less than the lower frequency limit of the preset frequency range.

[0119] If it is determined that the waiting power generation frequency is less than the lower frequency limit of the preset frequency range, step 360 is executed; otherwise, step 370 is executed.

[0120] Step 360: Increase the frequency of the generator set based on the reference frequency.

[0121] Step 370: lower the frequency of the generator set based on the reference frequency.

[0122] After a second preset time after executing step 360 or step 370, the process returns to executing step 310.

[0123] The implementation of the frequency adjustment method provided in the embodiment of the present invention has the beneficial effect of executing any of the aforementioned frequency adjustment methods.

[0124] Figure 4 A schematic diagram of the structure of a frequency regulating device provided in an embodiment of the present invention, which can be applied to situations where the frequency of a hydropower system needs to be regulated. The device is installed in each generator set constituting the power generation system, can be implemented by software and / or hardware, and is generally integrated in an electronic device, such as a computer device.

[0125] like Figure 4 As shown, the device comprises:

[0126] An acquisition module 410 is used to acquire the current power generation frequency of the power generation system;

[0127] An execution module 420 is used to obtain a waiting power generation frequency of the power generation system after a waiting period ends when it is determined that the current power generation frequency exceeds a preset frequency range, wherein the waiting period is determined according to the number of the generator set;

[0128] The frequency modulation module 430 is used to modulate the frequency of the generator set according to a reference frequency when it is determined that the waiting power generation frequency exceeds the preset frequency range, wherein the reference frequency is determined according to the frequency modulation capability of each of the generator sets.

[0129] The frequency regulating device provided in this embodiment is installed in each generator set constituting a power generation system, and the method includes: obtaining the current power generation frequency of the power generation system; in the case of determining that the current power generation frequency exceeds the preset frequency range, after the waiting period ends, obtaining the waiting power generation frequency of the power generation system, wherein the waiting period is determined according to the number of the power generation set; in the case of determining that the waiting power generation frequency exceeds the preset frequency range, frequency-modulating the power generation set according to the reference frequency, wherein the reference frequency is determined according to the frequency modulation capability of each of the power generation sets. In the above technical scheme, each generator set constituting the power generation system obtains the current power generation frequency of the power generation system in real time, determines whether the current power generation frequency exceeds the preset frequency range by comparing the current power generation frequency with the upper and lower frequency limits of the preset frequency range, enters the waiting period when it is determined that the current power generation frequency exceeds the preset frequency range, and after the waiting period ends, continues to obtain the waiting power generation frequency of the power generation system, determines whether the waiting power generation frequency exceeds the preset frequency range by comparing the waiting power generation frequency with the upper and lower frequency limits of the preset frequency range, and modulates the power generation set according to the reference frequency when it is determined that the waiting power generation frequency exceeds the preset frequency range. When it is determined that the current power generation frequency and the waiting power generation frequency after the waiting period determined according to the number of the generator set are both out of the preset frequency range, the generator set is frequency-adjusted, and the power generation system is further frequency-adjusted, so that the order in which each generator set adjusts the frequency of the power generation system is determined according to the number of each generator set, thereby realizing phased adjustment of the frequency of the power generation system. In addition, there is no need for communication between the generator sets, thereby avoiding the influence of communication facilities on the frequency adjustment of the power generation system and improving the adjustment effect.

[0130] Based on the above embodiment, the acquisition module 410 is specifically used for:

[0131] The current power generation frequency of the power generation system is obtained based on a frequency monitor installed on the power generation set.

[0132] Based on the above embodiment, the device further includes:

[0133] A determination module is used to determine the response time of each of the generator sets, determine the basic adjustment period according to each of the response times and the first preset time; and determine the waiting period of each of the generator sets according to the number of each of the generator sets and the basic adjustment period.

[0134] In one implementation, determining a basic adjustment period according to each of the response times and the first preset time includes:

[0135] If each of the response times is less than the first preset time, the maximum response time is determined as the basic adjustment period; otherwise, the first preset time is determined as the basic adjustment period.

[0136] In one implementation, determining the waiting period of each of the generator sets according to the number of each of the generator sets and the basic adjustment period includes:

[0137] When it is determined that the number of the generator set is 1, the waiting period is determined to be 0; when it is determined that the number of the generator set is not 1, the initial adjustment period is determined according to the basic adjustment period and the time deviation, and the waiting period is determined according to the initial adjustment period, the number and the basic adjustment period.

[0138] Based on the above embodiment, the frequency modulation module 430 is specifically used for:

[0139] When it is determined that the waiting power generation frequency is less than the lower frequency limit of the preset frequency range, the frequency of the generator set is increased based on the reference frequency; when it is determined that the waiting power generation frequency is greater than the upper frequency limit of the preset frequency range, the frequency of the generator set is decreased based on the reference frequency.

[0140] Based on the above embodiment, the device further includes:

[0141] The re-acquisition module is used to return to execute acquisition of the current power generation frequency of the power generation system after a second preset time.

[0142] The frequency adjustment device provided in the embodiment of the present invention can execute the frequency adjustment method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects for executing the frequency adjustment method.

[0143] It is worth noting that in the embodiment of the above-mentioned frequency regulation device, the various units and modules included are only divided according to functional logic, but are not limited to the above-mentioned division, as long as the corresponding functions can be achieved; in addition, the specific names of the functional units are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of the present invention.

[0144] Figure 5 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. Figure 5 A block diagram of an exemplary electronic device 5 suitable for implementing embodiments of the present invention is shown. Figure 5The electronic device 5 shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present invention.

[0145] like Figure 5 As shown, the electronic device 5 is in the form of a general purpose computing electronic device. The components of the electronic device 5 may include, but are not limited to: one or more processors or processing units 16, a system memory 28, and a bus 18 connecting different system components (including the system memory 28 and the processing unit 16).

[0146] Bus 18 represents one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, a processor or a local bus using any of a variety of bus architectures. By way of example, these architectures include, but are not limited to, an Industry Standard Architecture (ISA) bus, a Micro Channel Architecture (MAC) bus, an Enhanced ISA bus, a Video Electronics Standards Association (VESA) local bus, and a Peripheral Component Interconnect (PCI) bus.

[0147] The electronic device 5 typically includes a variety of computer system readable media. These media can be any available media that can be accessed by the electronic device 5, including volatile and non-volatile media, removable and non-removable media.

[0148] The system memory 28 may include computer system readable media in the form of volatile memory, such as random access memory (RAM) 30 and / or cache memory 32. The electronic device 5 may further include other removable / non-removable, volatile / non-volatile computer system storage media. By way of example only, the storage system 34 may be used to read and write non-removable, non-volatile magnetic media ( Figure 5 not shown, usually called a "hard drive"). Although Figure 5 Not shown in the figure, a disk drive for reading and writing to a removable non-volatile disk (e.g., a "floppy disk"), and an optical disk drive for reading and writing to a removable non-volatile optical disk (e.g., a CD-ROM, a DVD-ROM, or other optical media) may be provided. In these cases, each drive may be connected to the bus 18 via one or more data medium interfaces. The system memory 28 may include at least one program product having a set (e.g., at least one) of program modules that are configured to perform the functions of the various embodiments of the present invention.

[0149] A program / utility 40 having a set (at least one) of program modules 42 may be stored, for example, in system memory 28, such program modules 42 including, but not limited to, an operating system, one or more application programs, other program modules, and program data, each of which or some combination may include an implementation of a network environment. Program modules 42 generally perform the functions and / or methods of the embodiments described herein.

[0150] The electronic device 5 may also communicate with one or more external devices 14 (e.g., keyboards, pointing devices, displays 24, etc.), one or more devices that enable a user to interact with the electronic device 5, and / or any device that enables the electronic device 5 to communicate with one or more other computing devices (e.g., network cards, modems, etc.). Such communication may be performed via an input / output (I / O) interface 22. Furthermore, the electronic device 5 may also communicate with one or more networks (e.g., a local area network (LAN), a wide area network (WAN), and / or a public network, such as the Internet) via a network adapter 20. Figure 5 As shown, the network adapter 20 communicates with other modules of the electronic device 5 via the bus 18. It should be understood that although Figure 5 Not shown, other hardware and / or software modules may be used in conjunction with the electronic device 5, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0151] The processing unit 16 executes various functional applications and page displays by running the program stored in the system memory 28, for example, implementing the frequency adjustment method provided in the embodiment of the present invention, which is applied to each generator set constituting the power generation system, including:

[0152] Obtain the current power generation frequency of the power generation system;

[0153] In the case where it is determined that the current power generation frequency exceeds the preset frequency range, after the waiting period ends, obtaining the waiting power generation frequency of the power generation system, wherein the waiting period is determined according to the number of the generator set;

[0154] When it is determined that the waiting power generation frequency exceeds the preset frequency range, the generator set is frequency-regulated according to a reference frequency, wherein the reference frequency is determined according to the frequency regulation capability of each of the generator sets.

[0155] Of course, those skilled in the art can understand that the processor can also implement the technical solution of the frequency adjustment method provided by any embodiment of the present invention.

[0156] An embodiment of the present invention provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, a frequency adjustment method provided by an embodiment of the present invention is implemented. The method is applied to each generator set constituting a power generation system, and includes:

[0157] Obtain the current power generation frequency of the power generation system;

[0158] In the case where it is determined that the current power generation frequency exceeds the preset frequency range, after the waiting period ends, obtaining the waiting power generation frequency of the power generation system, wherein the waiting period is determined according to the number of the generator set;

[0159] When it is determined that the waiting power generation frequency exceeds the preset frequency range, the generator set is frequency-regulated according to a reference frequency, wherein the reference frequency is determined according to the frequency regulation capability of each of the generator sets.

[0160] The computer storage medium of the embodiment of the present invention can adopt any combination of one or more computer-readable media. The computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium can be, for example, but not limited to: an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples (non-exhaustive list) of computer-readable storage media include: an electrical connection with one or more wires, a portable computer disk, 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 disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this document, a computer-readable storage medium can be any tangible medium containing or storing a program, which can be used by an instruction execution system, device or device or used in combination with it.

[0161] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, which carry computer-readable program code. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. Computer-readable signal media may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0162] The program code embodied on the computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

[0163] Computer program code for performing the operations of the present invention may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0164] It should be understood by those skilled in the art that the modules or steps of the present invention described above can be implemented by a general-purpose computing device, they can be concentrated on a single computing device, or distributed on a network composed of multiple computing devices, optionally, they can be implemented by a program code executable by a computer device, so that they can be stored in a storage device and executed by the computing device, or they can be made into individual integrated circuit modules, or multiple modules or steps therein can be made into a single integrated circuit module for implementation. Thus, the present invention is not limited to any specific combination of hardware and software.

[0165] In addition, the acquisition, storage, use, and processing of data in the technical solution of the present invention are in compliance with the relevant provisions of national laws and regulations.

[0166] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A frequency adjustment method, characterized in that: Applied to each generator set constituting a power generation system, the method comprises: Obtain the current power generation frequency of the power generation system; In the case where it is determined that the current power generation frequency exceeds the preset frequency range, after the waiting period ends, obtaining the waiting power generation frequency of the power generation system, wherein the waiting period is determined according to the number of the generator set; When it is determined that the waiting power generation frequency exceeds the preset frequency range, the generator set is frequency-regulated according to a reference frequency, wherein the reference frequency is determined according to the frequency regulation capability of each of the generator sets.

2. The frequency adjustment method according to claim 1, characterized in that: Get the current power generation frequency of the power generation system, including: The current power generation frequency of the power generation system is obtained based on a frequency monitor installed on the power generation set.

3. The frequency adjustment method according to claim 1, characterized in that: Also includes: Determine the response time of each of the generator sets, and determine a basic regulation period according to each of the response times and a first preset time; The waiting period of each of the generator sets is determined according to the number of each of the generator sets and the basic adjustment period.

4. The frequency adjustment method according to claim 3, characterized in that: Determining a basic adjustment period according to each of the response times and the first preset time includes: If each of the response times is less than the first preset time, the maximum response time is determined as the basic adjustment period; otherwise, the first preset time is determined as the basic adjustment period.

5. The frequency adjustment method according to claim 3, characterized in that: Determining the waiting period of each of the generator sets according to the number of each of the generator sets and the basic adjustment period includes: When it is determined that the number of the generator set is 1, the waiting period is determined to be 0; When it is determined that the number of the generator set is not 1, an initial adjustment period is determined according to the basic adjustment period and the time deviation, and the waiting period is determined according to the initial adjustment period, the number and the basic adjustment period.

6. The frequency adjustment method according to claim 1, characterized in that: When it is determined that the waiting power generation frequency exceeds the preset frequency range, the frequency of the generator set is adjusted according to the reference frequency, including: When it is determined that the waiting power generation frequency is less than the lower frequency limit of the preset frequency range, increasing the frequency of the generator set based on the reference frequency; When it is determined that the waiting power generation frequency is greater than the upper frequency limit of the preset frequency range, the frequency of the generator set is lowered based on the reference frequency.

7. The frequency adjustment method according to claim 1, characterized in that: After the generator set is frequency-regulated according to the reference frequency, the method further comprises: After the second preset time, the process returns to the step of obtaining the current power generation frequency of the power generation system.

8. A frequency adjustment device, characterized in that: The generator sets installed in the power generation system include: An acquisition module, used for acquiring the current power generation frequency of the power generation system; An execution module, configured to obtain a waiting power generation frequency of the power generation system after a waiting period ends when it is determined that the current power generation frequency exceeds a preset frequency range, wherein the waiting period is determined according to the number of the power generation set; The frequency modulation module is used to modulate the frequency of the generator set according to a reference frequency when it is determined that the waiting power generation frequency exceeds the preset frequency range, wherein the reference frequency is determined according to the frequency modulation capability of each of the generator sets.

9. An electronic device, characterized in that: The electronic device comprises: at least one processor; and a memory communicatively coupled to the at least one processor; The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the frequency adjustment method as described in any one of claims 1-7.

10. A storage medium containing computer executable instructions, characterized in that: The computer executable instructions are used to perform the frequency adjustment method as claimed in any one of claims 1 to 7 when executed by a computer processor.

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