Method and device for optimizing synchronous unit startup mode, terminal and storage medium

Abstract

The application discloses a method and device for optimizing synchronous unit starting mode, a terminal and a storage medium, and is characterized in that the method comprises the following steps: step 1, determining a power system sub-region according to the operation mode of synchronous units in the power system, and calculating the inertia coefficient and minimum power inertia in each sub-region; step 2, collecting the operation parameters of synchronous units in the power system, and calculating the average output coefficient of the synchronous units based on the operation parameters and the minimum power inertia in step 1; and step 3, optimizing the configuration mode of synchronous generator units and inertialess power sources in the sub-region based on the value of the average output coefficient. In the application, the power system is divided into sub-regions, and a reasonable synchronous unit configuration optimization mode is provided for each region according to the average output coefficient of synchronous units in each region, so that the rationalization of synchronous unit configuration is realized.

Description

Technical Field

[0001] This invention relates to the field of power systems, and more specifically, to a method, apparatus, and storage medium for optimizing the start-up mode of synchronous generator units. Background Technology

[0002] With the continuous increase in ultra-high voltage direct current (UHVDC) transmission capacity and distributed renewable energy grid connection capacity, traditional synchronous generators are being replaced. On the one hand, the power system faces an increasing risk of large-capacity power deficit faults; on the other hand, as the system's inertia and primary frequency regulation capability continue to decrease, the risk of frequency instability due to multiple DC feeds into the grid is also gradually increasing.

[0003] The moment of inertia of a conventional generator set is a crucial parameter in a power system. It reflects the generator set's ability to buffer frequency changes in the power system, ensuring that the generator set has sufficient time and capability to regulate the active power of the grid under conditions of significant load disturbances. This parameter, along with the generator set's real-time output and spinning reserve, serves as an important parameter of the power system, determining its resilience during load adjustments.

[0004] However, with the continuous development of new energy grid connection technologies, wind power, photovoltaic power generation, and other new energy power generation methods differ from traditional generator sets. Their generator sets have very small inertia, or even zero, resulting in a lack of reasonable frequency regulation capabilities for these distributed power sources. This means that when the voltage in the power system fluctuates significantly, the actual output of these distributed power sources will also change dramatically, posing a significant threat to the system's frequency security. When using the reserve capacity of traditional generator sets to regulate or compensate for the fluctuations of these distributed power sources, sufficient reserve capacity is required in the traditional generator sets of the power system. This leads to problems such as low energy supply efficiency and high power system construction costs.

[0005] Furthermore, even without considering construction costs, as new energy power generation methods become more widespread, their impact on the traditional power grid will become increasingly significant. If traditional generator sets cannot rationally plan their reserve power and inertia and other important indicators, it will have a significant impact on the safe operation of the power grid, leading to problems such as instability in local power grids, lack of fairness and rationality in the start-up methods of synchronous generator sets, and difficulty in effectively guaranteeing the service life of individual synchronous generator sets.

[0006] To address the above problems, the present invention provides an optimization method, apparatus, terminal, and readable medium for the startup mode of synchronous generator units. Summary of the Invention

[0007] To address the shortcomings of existing technologies, the present invention aims to provide an optimization method, apparatus, terminal, and readable medium for the start-up mode of synchronous generator units. The method of the present invention divides the power system into sub-regions and provides a reasonable synchronous generator unit configuration optimization method for each region based on the average output coefficient of the synchronous generator units in each region.

[0008] The present invention adopts the following technical solution.

[0009] The first aspect of this invention relates to an optimization method for the start-up mode of synchronous generator sets, wherein the method includes the following steps: Step 1, determining sub-regions of the power system based on the operating mode of the synchronous generator sets in the power system, and calculating the inertia coefficient and minimum power source inertia in each sub-region; Step 2, collecting the operating parameters of the synchronous generator sets in the power system, and calculating the average output coefficient of the synchronous generator sets based on the operating parameters and the minimum power source inertia in Step 1; Step 3, optimizing the configuration mode of synchronous generator sets and inertia-free power sources in the sub-regions based on the value of the average output coefficient.

[0010] Preferably, the sub-regions of the power system are determined by dividing the power system into sub-regions based on the topology of the power grid and the geographical location of important power plants in the power system.

[0011] Preferably, the inertia coefficient of each sub-region is

[0012]

[0013] In the formula, P L P represents the total load demand of the power system. re P represents the total output of the power source with no inertia in the power system. L.n P represents the total load demand in the current sub-region n. re.n P represents the total output of the inertial-free power source in the current sub-region n. tline.n It contributes to the total interaction between the current subregion n and other subregions.

[0014] Preferably, the minimum power supply inertia in each sub-region is

[0015] E MWs.n =λ n E MWs

[0016] Among them, E MWs This is the minimum inertia of the system.

[0017] Preferably, the minimum inertia of the system is obtained by gradually reducing the current inertia within the power system until any DC transmission system in the power system experiences continuous commutation failure; the inertia before the commutation failure is recorded as the minimum inertia of the system.

[0018] Preferably, the operating parameters of the synchronous generators in the power system include the operating inertia time constant H of the synchronous generators in the current sub-region n. av.n Rated output P of synchronous generator unit G.n .

[0019] Preferably, the average output coefficient of the synchronous generator unit is

[0020] Preferably, in step 3, a limited range [k] is set for the average output coefficient of the current sub-region. min.n ,k max.n The configuration of synchronous generator sets and inertia-free power sources in the sub-region is optimized based on the constraints until the average output coefficient of the current sub-region meets the requirements of the constraints.

[0021] Preferably, when k min.n ≤k n ≤k max.n When k, no optimization is performed on the synchronous units in the current sub-region; when k n >k max.n At the same time, reduce the number or output of synchronous generators in the current sub-region, and increase the operating capacity of synchronous generators. When k n <k min.n At the same time, increase the output of the synchronous generator units in the current sub-region and decrease the operating capacity of the synchronous generator units. And reduce the output of the power source without inertia.

[0022] Preferably, when the current sub-region experiences a decrease in power output to 0 due to inertia, an increase in synchronous generator output to rated output, and a decrease in operating capacity... Even when reduced to the minimum, k still exists. n <k min.n If so, other sub-regions will be selected to support the synchronous unit output of the current sub-region.

[0023] Preferably, after support is provided, there still exists a sub-region j with k in the power system. j <k min.j This would increase the number of synchronous generators in the power system and require a redesign of their operation.

[0024] In a second aspect, the present invention provides an optimization device for the operation mode of synchronous generator sets. The device includes a data acquisition module, a calculation module, and an optimization module. The data acquisition module is used to determine sub-regions of the power system based on the operating mode of the synchronous generator sets in the power system and to acquire the operating parameters of the synchronous generator sets in the power system. The calculation module is used to calculate the inertia coefficient and minimum power source inertia in each sub-region, as well as the average output coefficient of the synchronous generator sets. The optimization module is used to optimize the configuration of synchronous generator sets and inertia-free power sources in the sub-regions based on the value of the average output coefficient.

[0025] A third aspect of the present invention relates to a terminal, the terminal including a processor and a memory, wherein the processor is configured to perform operations according to instructions to execute the optimization method for the synchronous unit start-up mode described in the first aspect of the present invention.

[0026] A third aspect of the present invention relates to a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements an optimization method for the synchronous unit start-up mode as described in the first aspect of the present invention.

[0027] The beneficial effect of the present invention is that, compared with the prior art, the method, device, terminal and readable medium for optimizing the start-up mode of synchronous generator units in the present invention can divide the power system into sub-regions and provide a reasonable synchronous generator unit configuration optimization method for each region based on the average output coefficient of the synchronous generator units in each region, thereby realizing the rational configuration of synchronous generator units.

[0028] The beneficial effects of the present invention also include:

[0029] 1. From the perspective of the macro power system, sub-regions are divided according to the arrangement of synchronous generator units. The synchronous generator units are rationally configured according to the situation of each sub-region and the overall situation of the power system. This ensures that the operation of generator units in each sub-region can meet the inertia index requirements, and that the entire power system can achieve effective and accurate power balance.

[0030] 2. The method of the present invention can fully consider the number of existing synchronous generators, output conditions, and the arrangement of power sources without inertia in the power system, and fully optimize the power system based on the existing power generation capacity. This optimization can achieve the lowest optimization cost, the least cost, and meet the regional characteristics requirements of new energy power generation. On this basis, it realizes the reasonable adjustment of the generator start-up mode. Attached Figure Description

[0031] Figure 1 This is a schematic diagram illustrating the steps of an optimized method for starting up a synchronous generator unit according to the present invention.

[0032] Figure 2This is a schematic diagram of the structure of an optimization device for the start-up mode of a synchronous generator unit in this invention. Detailed Implementation

[0033] The present application will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention, and should not be construed as limiting the scope of protection of the present application.

[0034] Figure 1 This is a schematic diagram illustrating the steps of an optimized method for starting up a synchronous generator unit according to the present invention. For example... Figure 1 As shown, the first aspect of the present invention relates to an optimization method for the start-up mode of a synchronous generator set, the method comprising steps 1 to 3.

[0035] Step 1: Determine the sub-regions of the power system based on the operating mode of the synchronous generators in the power system, and calculate the inertia coefficient and minimum power source inertia in each sub-region.

[0036] It is understood that the power system mentioned in this invention can be a macro-level power system, for example, whose power grid coverage can reach multiple cities or even multiple provinces. In one embodiment of this invention, the area covered by the power grid in this power system is the East China Power Grid.

[0037] To better assess the inertia in local sub-regions of a power system and optimize the start-up method of synchronous generator units, thereby achieving energy supply balance across the entire power system and ensuring that the power supply and regulation response speed in each local sub-region meet requirements, this invention divides the entire power system into multiple sub-regions based on various factors. This division allows for the collection of energy supply characteristics for each sub-region and the generation of rational optimization methods.

[0038] Preferably, the method for determining the sub-regions of the power system is as follows:

[0039] The power system is divided into sub-regions based on the topology of the power grid and the geographical locations of important power stations. Specifically, important power stations refer to substations or distribution stations in the power system. In this invention, based on the grid topology, power stations located on backbone nodes can be called important power stations, while power stations located on secondary nodes connected to the backbone node are not considered important power stations. This invention can divide the power system into sub-regions based on the distribution and location of these important power stations. For example, all important power stations located in a province, all other power stations under these important power stations, and their interconnection networks can constitute a sub-region. Of course, other methods in the prior art can also be used to divide sub-regions. However, the purpose of the division is mainly to rationally configure the inertia of synchronous generator units in different sub-regions. Therefore, the number of sub-regions and the size of the area covered can be rationally adjusted according to the configuration objectives.

[0040] In one embodiment of the present invention, the method described above is used to divide the East China Power Grid into Jiangsu sub-region, Zhejiang sub-region, Shanghai sub-region, Anhui sub-region and Fujian sub-region.

[0041] Preferably, the inertia coefficient of each sub-region is

[0042]

[0043] In the formula, P L This represents the total load demand of the power system.

[0044] P re The total output of the power source with no inertia in the power system.

[0045] P L.n This represents the total load demand in the current sub-region n.

[0046] P re.n This represents the total output of the inertial-free power source in the current sub-region n.

[0047] P tline.n It contributes to the total interaction between the current subregion n and other subregions.

[0048] It is understandable that this invention takes into account the different load demands and power supply capabilities of each sub-region, and does not distribute the inertia required by the entire power grid evenly across each region. In fact, this invention calculates different inertia for each sub-region based on its unique characteristics.

[0049] In this invention, the inertia coefficient characterizes the difference in energy supply and usage between the current sub-region and the entire power system. For calculating the inertia coefficient, this invention refers to traditional generator sets as power sources with inertia or synchronous generator sets. Conversely, this invention collectively refers to grid-connected power generation methods from new energy sources such as wind power and hydropower generator sets as power sources without inertia.

[0050] In the above formula, the total load demand of the power system and the total load demand of the current sub-region can be obtained from historical data in the power marketing system, while the total output of the power system and the current sub-region's inertia-free power sources can be obtained from the actual configuration of new energy distributed power stations within the region and the entire system. Furthermore, this invention considers the power interaction between different sub-regions. For example, one region may have a long-term under-configuration problem, while another region has a long-term over-configuration problem. Cross-regional power supply can be achieved through inter-regional coordination. For this invention, total interactive output can be used to express this. This data can be obtained by collecting and summing the active power data transmitted on the regional interconnection lines between the sub-region's power grid and all other external regions.

[0051] The calculation of the inertia coefficient in this invention takes into account the following issues. From the perspective of power balance alone, the operating capacity of generating units within a region should be proportional to the net electricity load of the region; the greater the local load demand, the greater the operating capacity of the generating units should be. Furthermore, considering the interactive output between regional power grids via AC tie lines, the operating capacity should be proportional to the local net load, i.e., the actual load minus the output of power sources without inertia and the total power transmitted from this sub-region to other sub-regions. However, under this principle, the larger the renewable energy output and DC feed-in of a region, the smaller the inertia support coefficient will be. This leads to a severe deterioration of the system's transient voltage stability within the sub-region caused by distributed power sources such as DC and renewable energy units that lack dynamic voltage regulation capabilities. Therefore, this invention aims to provide a larger inertia coefficient even in regions with a high proportion of renewable energy and DC integration, thereby supporting the internal stability of the sub-region during grid fluctuations. In addition, considering the risk of instantaneous high-power surges that may occur during voltage dips at the grid connection point for DC and new energy units, in order to reduce the spatiotemporal distribution characteristics of system frequency, the inertia level in local areas should be proportional to the amount of local DC and new energy connections.

[0052] After obtaining the aforementioned inertia coefficients, the minimum power inertia for each sub-region can be calculated.

[0053] Preferably, the minimum power supply inertia in each sub-region is

[0054] E MWs.n =λ n E MWs

[0055] Among them, E MWs This is the minimum inertia of the system.

[0056] It is understood that, in this invention, the minimum power supply inertia of each region should be the product of the minimum inertia of the entire power system and the inertia coefficient. Since the inertia coefficient mentioned above represents the unbalanced state of multiple different sub-regions, multiplying the minimum inertia of the total system by it yields the minimum power supply inertia of the region.

[0057] Preferably, the minimum inertia of the system is obtained by gradually reducing the current inertia within the power system until any DC transmission system in the power system experiences continuous commutation failure; the inertia before the commutation failure is recorded as the minimum inertia of the system.

[0058] Understandably, in order to ensure frequency stability in the power grid, the power system needs a minimum inertia. Even at this minimum inertia, the system's self-regulation can ensure the safe operation of all power generation equipment, while also meeting the load demands of system users and keeping up with the rate of change in load demand.

[0059] Considering that when the system inertia decreases, the first and most likely component affected in the system is the commutation failure of the DC transmission equipment, this invention uses this problem as a constraint to determine the value of the minimum inertia.

[0060] In one embodiment of the present invention, the power output, load conditions and inertia distribution status of each sub-region of the East China Power Grid were collected, and it was found that the normal inertia of the system was 537612MW.s before the DC transmission system failed to commutate twice in a row.

[0061]

[0062] Table 1. Inertia Distribution of Each Subregion

[0063] Step 2: Collect the operating parameters of the synchronous generator units in the power system, and calculate the average output coefficient of the synchronous generator units based on the operating parameters and the minimum power source inertia in Step 1.

[0064] This invention can also acquire various parameters of the synchronous generator unit.

[0065] Preferably, the operating parameters of the synchronous generators in the power system include the operating inertia time constant H of the synchronous generators in the current sub-region n. av.n Rated output P of synchronous generator unit G.n .

[0066] Since data such as the unit's inertial time constant and rated output can directly affect the unit's start-up and operation mode, this invention collects these data in advance.

[0067] In reality, the data for different units differs. However, in optimization calculations, this parameter can be simplified, for example, by choosing an average value to approximate the optimization result. Alternatively, the formula mentioned below can be used to calculate and sum the results for each region and each unit based on the relevant information obtained for each sub-region; this would yield a more accurate result.

[0068] Preferably, the average output coefficient of the synchronous generator unit is

[0069] Understandably, the minimum operating capacity of a synchronous generator unit can be... Therefore, the minimum operating capacity of each region can be obtained based on the magnitude of the inertia of each region. In one embodiment of the present invention, as shown in Table 2, if the average inertial time constant of the synchronous generator is selected as 5.29s, the operating capacity of each sub-region can be obtained.

[0070] Inertia / MW.s On-stream capacity / MW Shanghai 48699 9206 Jiangsu 244139 46151 Zhejiang 112638 21293 Anhui 76044 14375 Fujian 56092 10603

[0071] Table 2 Minimum Power-on Capacity for Each Sub-region

[0072] In this invention, the average output coefficient can be further calculated based on the minimum operating capacity.

[0073] On-stream capacity / MW Average capacity factor Shanghai 9206 0.21 Jiangsu 46151 0.48 Zhejiang 21293 0.22 Anhui 14375 0.30 Fujian 10603 1.23

[0074] Table 3 shows the average output coefficient for each sub-region.

[0075] In this invention, the average output coefficient can be obtained based on the rated power, and it can also be obtained based on the real-time output of the unit. This average output coefficient can be calculated by averaging the output of the synchronous unit at multiple time points. Furthermore, to effectively determine the output capacity of the synchronous unit, the rated power can be used in this invention to achieve optimized power supply configuration.

[0076] Step 3: Optimize the configuration of synchronous generator sets and inertia-free power sources in the sub-region based on the average output coefficient value.

[0077] As mentioned above, the present invention can also select an appropriate limiting range to restrict the reasonable value of the average output coefficient.

[0078] Preferably, in step 3, a limited range [k] is set for the average output coefficient of the current sub-region. min.n ,k max.nThe configuration of synchronous generator sets and inertia-free power sources in the sub-region is optimized based on the constraints until the average output coefficient of the current sub-region meets the requirements of the constraints.

[0079] In this invention, the scope can be determined based on historical data from the power grid operation process, as well as expert experience.

[0080] In one embodiment of the present invention, based on the minimum output requirement and maximum output capacity of the synchronous generator, the average output coefficient of all regions is limited to a range of 0.5 to 1.

[0081] Preferably, when k min.n ≤k n ≤k max.n When k, no optimization is performed on the synchronous units in the current sub-region; when k n >k max.n At the same time, reduce the number or output of synchronous generators in the current sub-region, and increase the operating capacity of synchronous generators. When k n <k min.n At the same time, increase the output of the synchronous generators in the current sub-region and decrease the operating capacity of the synchronous generators. And reduce the output of the power source without inertia.

[0082] It is understandable that when the average output coefficient is within a defined range, its value can be considered reasonable, and therefore the configuration of synchronous generators and inertia-free power supplies in this region is reasonable. However, when the average output coefficient is too small, the inertia in this region can be considered too small, making it difficult to meet the load fluctuations of the system. In this case, the output of the synchronous generators should be increased, or the output of the inertia-free power supplies should be decreased. Of course, it is also possible to adjust the response speed by reducing the inertia time constant of the generators, that is, by reducing the operating capacity. Since adding additional synchronous generators is a costly option, in this invention, the corresponding solutions can be considered in subsequent steps.

[0083] On the other hand, if the average output coefficient is too high, then it is necessary to reduce the output of the synchronous generators and increase the operating capacity. If the average output coefficient is still too low, it is also possible to choose not to start the synchronous generators, that is, to reduce the number of synchronous generators.

[0084]

[0085] Table 4. Average output coefficients of synchronous generator units before regulation in each sub-region.

[0086] As shown in Table 4, after using the above method to adjust the starting capacity of the Fujian sub-region with insufficient capacity to a higher level, the output of multiple regions can be adjusted to a normal state. However, the average output coefficient of Shanghai in Table 4 is still too small, so further adjustment is needed.

[0087] Preferably, when the current sub-region experiences a decrease in power output to 0 due to inertia, an increase in synchronous generator output to rated output, and a decrease in operating capacity... Even when reduced to the minimum, k still exists. n <k min.n If so, other sub-regions will be selected to support the synchronous unit output of the current sub-region.

[0088] It is understood that, in this invention, if the adjustment by the above means is still insufficient to adjust the inertia of a certain sub-region to a sufficiently high level, then the remaining adjustment capability of other sub-regions can be used to support the current sub-region.

[0089] Preferably, after support is provided, there still exists a sub-region j with k in the power system. j <k min.j This would increase the number of synchronous generators in the power system and require a redesign of their operation.

[0090] It should be noted that if the inertia requirements of one or more areas in the system still cannot be met after support measures are provided, then adding synchronous generators can be considered as a last resort. However, this addition requires coordinated planning, taking into account the energy and inertia requirements of the entire power system.

[0091]

[0092] Table 5. Average output coefficient of synchronous generator units after adjustment in each sub-region.

[0093] After adjustment, the average power output coefficient of the Fujian sub-region decreased, while the average power output coefficient of Shanghai increased. After adjustment, the average power output coefficient of all sub-regions met the requirements.

[0094] The method of this invention can optimize and adjust the start-up mode of synchronous generators in various sub-regions of the entire power system, keep the system frequency stable, and optimize the arrangement to achieve a reasonable distribution of the total inertia support capacity of the system in different regions. This provides technical support for the decision-making of system operation mode and improves the fairness and rationality of the system operation mode arrangement.

[0095] Figure 2 This is a schematic diagram of the structure of an optimization device for the start-up method of a synchronous generator unit according to the present invention. Figure 2As shown, in a second aspect, the present invention relates to an optimization device for the operation mode of synchronous generator units. The device includes a data acquisition module, a calculation module, and an optimization module. The data acquisition module is used to determine sub-regions of the power system based on the operating mode of the synchronous generator units in the power system and to acquire the operating parameters of the synchronous generator units in the power system. The calculation module is used to calculate the inertia coefficient and minimum power source inertia in each sub-region, as well as the average output coefficient of the synchronous generator units. The optimization module is used to optimize the configuration of synchronous generator units and inertia-free power sources in the sub-regions based on the value of the average output coefficient.

[0096] It is understood that the device for optimizing the synchronous unit start-up method includes hardware structures and / or software modules corresponding to the execution of each function in order to achieve the various functions provided in the embodiments of this application. Those skilled in the art should readily recognize that, based on the algorithm steps of the examples described in conjunction with the embodiments disclosed herein, this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed in hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0097] This application embodiment can divide the device for optimizing the synchronous unit start-up mode into functional modules based on the above method example. For example, each function can be divided into its own functional module, or two or more functions can be integrated into one processing module. The integrated module can be implemented in hardware or as a software functional module. It should be noted that the module division in this application embodiment is illustrative and only represents one logical functional division; other division methods may be used in actual implementation.

[0098] A third aspect of the present invention relates to a terminal comprising a processor and a memory, the processor being configured to perform operations according to instructions to execute the optimization method for the synchronous unit start-up mode described in the first aspect of the present invention.

[0099] Specifically, a terminal may include a processor, a bus system, memory, and at least one communication interface.

[0100] The processor can be a central processing unit (CPU), or it can be replaced by a field programmable gate array (FPGA), an application-specific integrated circuit (ASIC), or other hardware. Alternatively, an FPGA or other hardware can be used together with a CPU as a processor.

[0101] The memory can be read-only memory (ROM) or other types of static storage devices capable of storing static information and instructions, random access memory (RAM) or other types of dynamic storage devices capable of storing information and instructions, or electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed discs, laser discs, optical discs, universal optical discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, but not limited to these. The memory can exist independently and be connected to the processor via a bus. The memory can also be integrated with the processor.

[0102] A fourth aspect of the present invention relates to a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements an optimization method for the synchronous unit start-up mode as described in the first aspect of the present invention.

[0103] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented using software programs, implementation can be, in whole or in part, in the form of a computer program product. This computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, computer instructions can be transmitted from one website, computer, server, or data center to another via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium accessible to a computer or a data storage device containing one or more servers, data centers, etc., that can be integrated with the medium. The available media can be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., DVDs), or semiconductor media (e.g., solid-state disks (SSDs)).

[0104] The beneficial effect of the present invention is that, compared with the prior art, the method, device, terminal and readable medium for optimizing the start-up mode of synchronous generator units in the present invention can divide the power system into sub-regions and provide a reasonable synchronous generator unit configuration optimization method for each region based on the average output coefficient of the synchronous generator units in each region, thereby realizing the rational configuration of synchronous generator units.

[0105] The applicant of this invention has provided a detailed description of the embodiments of the invention in conjunction with the accompanying drawings. However, those skilled in the art should understand that the above embodiments are merely preferred embodiments of the invention. The detailed description is only intended to help readers better understand the spirit of the invention and is not intended to limit the scope of protection of the invention. On the contrary, any improvements or modifications made based on the inventive spirit of the invention should fall within the scope of protection of the invention.

Claims

1. An optimization method for the start-up mode of a synchronous generator unit, characterized in that, The method includes the following steps: Step 1: Determine the sub-regions of the power system based on the operating mode of the synchronous generators in the power system, and calculate the inertia coefficient and minimum power source inertia in each sub-region; The inertia coefficient in each of the sub-regions is In the formula, This represents the total load demand of the power system. The total output of the power source without inertia in the power system. For the current sub-region Total load demand in the middle, For the current sub-region The total output of the power source with no inertia For the current sub-region Total interactive output between other sub-regions; The minimum power inertia in each of the sub-regions is in, This is the minimum inertia of the system; Step 2: Collect the operating parameters of the synchronous generator units in the power system, and calculate the average output coefficient of the synchronous generator units based on the operating parameters and the minimum power inertia in Step 1; Step 3: Optimize the configuration of synchronous units and inertia-free power sources in the sub-region based on the average output coefficient value.

2. The method for optimizing the start-up mode of a synchronous generator unit according to claim 1, characterized in that: The method for determining the sub-region of the power system is as follows: The power system is divided into sub-regions based on the topology of the power grid and the geographical location of important power plants in the power system.

3. The method for optimizing the start-up mode of a synchronous generator unit according to claim 2, characterized in that: The method for obtaining the minimum inertia of the system is as follows: The current inertia within the power system is gradually reduced until any DC transmission system in the power system experiences continuous commutation failure. The inertia before the commutation failure is recorded as the minimum inertia of the system.

4. The method for optimizing the start-up mode of a synchronous generator unit according to claim 3, characterized in that: The operating parameters of the synchronous generator units in the power system include the current sub-region. The operating inertial time constant of the synchronous generator unit described in the article The rated output of the synchronous generator unit .

5. The method for optimizing the start-up mode of a synchronous generator unit according to claim 4, characterized in that: The average output coefficient of the synchronous generator unit is .

6. The method for optimizing the start-up mode of a synchronous generator unit according to claim 5, characterized in that: In step 3, a limited range is set for the average output coefficient of the current sub-region. Based on the aforementioned limitations, the configuration of synchronous generators and inertia-free power supplies in the sub-region is optimized until the average output coefficient of the current sub-region meets the requirements of the defined range.

7. The method for optimizing the start-up mode of a synchronous generator unit according to claim 6, characterized in that: when At that time, the synchronization units in the current sub-region are not optimized; when At the same time, reduce the number or output of the synchronous generators in the current sub-region, and increase the operating capacity of the synchronous generators. ; when At the same time, increase the output of the synchronous generator in the current sub-region and decrease the operating capacity of the synchronous generator. And reduce the output of the power source without inertia.

8. The method for optimizing the start-up mode of a synchronous generator unit according to claim 7, characterized in that: When the current sub-region experiences a decrease in power output of the inertial power supply to 0, an increase in the output of the synchronous generator to its rated output, and an increase in the operating capacity... Even when reduced to the minimum, it still exists. If so, other sub-regions are selected to support the synchronous unit output of the current sub-region.

9. The method for optimizing the start-up mode of a synchronous generator unit according to claim 8, characterized in that: Even after receiving the aforementioned support, a certain sub-region still exists in the power system. of If so, the number of synchronous generators in the power system is increased, and the operation mode of the synchronous generators is replanned.

10. An optimization device for the start-up mode of a synchronous generator unit, characterized in that: The device includes a data acquisition module, a calculation module, and an optimization module; wherein, The acquisition module is used to determine the sub-region of the power system based on the operating mode of the synchronous generators in the power system, and to acquire the operating parameters of the synchronous generators in the power system. The calculation module is used to calculate the inertia coefficient and minimum power inertia in each of the sub-regions, as well as the average output coefficient of the synchronous generator unit. The inertia coefficient in each of the sub-regions is In the formula, This represents the total load demand of the power system. The total output of the power source without inertia in the power system. For the current sub-region Total load demand in the middle, For the current sub-region The total output of the power source with no inertia For the current sub-region Total interactive output between other sub-regions; The minimum power inertia in each of the sub-regions is in, This is the minimum inertia of the system; The optimization module is used to optimize the configuration of synchronous units and inertia-free power sources in the sub-region based on the value of the average output coefficient.

11. A terminal, characterized in that: The terminal includes a processor and a memory, wherein, The processor is configured to operate according to instructions to execute the optimization method for the synchronous unit start-up mode as described in any one of claims 1-9.

12. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by the processor, it implements the optimization method for the synchronous unit start-up mode as described in any one of claims 1-9.

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