Phase regulator determination method and device applicable to new energy stations

Abstract

The present invention provides a method and device for determining phase regulators applicable to new energy stations. The method for determining phase regulators applicable to new energy stations includes: connecting multiple phase regulators to the new energy station in order of their capacities from small to large until a preset stop access condition is reached; when each phase regulator is connected to the new energy station separately, determining the short circuit ratio between the new energy station and multiple new energy stations at its grid connection point, the stop access condition being that the short circuit ratio is greater than the minimum short circuit ratio of the new energy station; determining the phase regulators required for the new energy station and the number of the phase regulators according to the phase regulators corresponding to the multiple short circuit ratios. The present invention simultaneously considers the power consumption demand of the new energy station and the short circuit ratio index requirements of multiple new energy stations, and more accurately formulates the deployment plan of distributed small phase regulators, thereby increasing the resource utilization rate of the new energy station to the target value.

Description

Technical Field

[0001] The present invention relates to the field of new energy technology, and in particular to a phase regulator determination method and device suitable for a new energy station. Background Art

[0002] As the installed capacity and proportion of new energy will continue to maintain a high growth rate and gradually become the main power source, the thermal power units with strong grid support performance will gradually retire or be transformed into regulating power sources. In order to ensure that the system has sufficient voltage support strength to prevent transient overvoltage, low voltage and transient voltage instability, technical personnel in this field generally deploy distributed phase regulators in new energy stations to improve the voltage support capacity of new energy stations to the grid. However, the insufficient short-circuit ratio index of new energy multiple stations limits the output limit of new energy power stations, thereby affecting the utilization rate of new energy resources. Summary of the invention

[0003] The method and device for determining phase regulators suitable for new energy stations provided by the present invention can more accurately formulate a deployment plan for distributed small phase regulators while taking into account the power consumption demand of the new energy station and the short-circuit ratio index requirements of multiple new energy stations, thereby increasing the utilization rate of new energy resources to the target value.

[0004] In order to achieve the above objectives, in the first aspect, this party provides a phase shifting determination method applicable to a new energy station, comprising:

[0005] Connecting multiple phase-shifters to the new energy station in order of capacity from small to large until a preset stop connection condition is reached;

[0006] In the case where each phase regulator is connected to the new energy station separately, the short-circuit ratio between the new energy station and multiple new energy stations at its grid connection point is determined, and the connection stop condition is that the short-circuit ratio is greater than the minimum short-circuit ratio of the new energy station;

[0007] The phase regulators required by the new energy station and the quantity of the phase regulators are determined according to the phase regulators corresponding to the multiple short-circuit ratios.

[0008] In one embodiment, the connecting of the plurality of phase regulators to the new energy station in order of capacity from small to large includes:

[0009] Determine the corresponding simultaneous rate according to the maximum amount of electricity that can be abandoned by the new energy station within a preset period;

[0010] When the new energy station meets the simultaneity rate, the multiple phase-shifting machines are connected to the new energy station in order from small to large capacity.

[0011] In one embodiment, the method for determining the maximum discardable power comprises the following steps:

[0012] Obtaining a power curve of the new energy station;

[0013] Determine the total power of the new energy station according to the power curve;

[0014] The maximum amount of wasted electricity is determined according to the total amount of electricity and the resource utilization target value of the new energy station.

[0015] In one embodiment, determining the short circuit ratio between the new energy station and a plurality of new energy stations at its grid connection point includes:

[0016] The short-circuit ratio is determined according to the system short-circuit capacity, active power, mutual impedance and self-impedance when the new energy station is connected to the grid connection point.

[0017] In a second aspect, the present invention provides a phase regulator determination device applicable to a new energy station, the device comprising:

[0018] A phase regulator access module, used to sequentially access multiple phase regulators in order of capacity from small to large to the new energy station until a preset stop access condition is reached;

[0019] A short circuit ratio determination module, used for determining the short circuit ratio between the new energy station and multiple new energy stations at its grid connection point when each phase regulator is separately connected to the new energy station, wherein the stop connection condition is that the short circuit ratio is greater than the minimum short circuit ratio of the new energy station;

[0020] The phase regulator determination module is used to determine the phase regulators required by the new energy station and the number of the phase regulators according to the phase regulators corresponding to multiple short-circuit ratios.

[0021] In one embodiment, the phase regulator access module includes:

[0022] A simultaneous rate determination unit, configured to determine a corresponding simultaneous rate according to a maximum amount of discarded electricity of the new energy station within a preset period;

[0023] The phase regulator access unit is used to connect the multiple phase regulators to the new energy station in order from small to large capacity when the new energy station meets the simultaneity rate.

[0024] In one embodiment, the phase regulator determination device applicable to the new energy station further includes: a discardable power determination module, which is used to determine the maximum discardable power, and the discardable power determination module includes:

[0025] A power curve generating unit, used for obtaining a power curve of the new energy station;

[0026] A total power generation unit, used to determine the total power of the new energy station according to the power curve;

[0027] The abandonable power determination unit is used to determine the maximum abandonable power according to the total power and the resource utilization target value of the new energy station.

[0028] In one embodiment, the short-circuit ratio determination module is specifically used to determine the short-circuit ratio according to the system short-circuit capacity, active power, mutual impedance and self-impedance when the new energy station is connected to the grid connection point.

[0029] In a third aspect, the present invention provides a computer program product, including a computer program / instruction, which, when executed by a processor, implements the steps of a phase regulator determination method applicable to a new energy station.

[0030] In a fourth aspect, the present invention provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the steps of a method for determining a phase regulator applicable to a new energy station are implemented.

[0031] In a fifth aspect, the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of a method for determining a phase regulator applicable to a new energy station.

[0032] From the above description, it can be seen that the phase regulator determination method and device applicable to the new energy station provided by the embodiment of the present invention include: first, connecting multiple phase regulators to the new energy station in order from small to large in capacity, until the preset stop access condition is reached; then, when each phase regulator is connected to the new energy station alone, determine the short-circuit ratio between the new energy station and multiple new energy stations at its grid connection point, and the stop access condition is that the short-circuit ratio is greater than the minimum short-circuit ratio of the new energy station; finally, determine the phase regulators required for the new energy station and the number of the phase regulators according to the phase regulators corresponding to the multiple short-circuit ratios. The present invention more accurately formulates the deployment plan of distributed small phase regulators while taking into account the power consumption demand of the new energy station and the short-circuit ratio index requirements of multiple new energy stations, thereby increasing the utilization rate of new energy resources to the target value. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 Schematic diagram of the process of determining the phase regulator for a new energy station provided in an embodiment of the present invention Figure 1 ;

[0035] Figure 2 It is a flowchart diagram of step 100 of a method for determining a phase regulator for a new energy station in an embodiment of the present invention;

[0036] Figure 3 Schematic diagram of the process of determining the phase regulator for a new energy station provided in an embodiment of the present invention Figure 2 ;

[0037] Figure 4 It is a flowchart diagram of step 400 of a method for determining a phase regulator for a new energy station in an embodiment of the present invention;

[0038] Figure 5 It is a flow chart of a method for determining a phase regulator suitable for a new energy station in a specific application example of the present invention;

[0039] Figure 6 A mind map of a method for determining a phase regulator suitable for a new energy station in a specific application example of the present invention;

[0040] Figure 7 It is a schematic diagram of an annual wind power resource curve of an actual wind farm in a specific application example of the present invention;

[0041] Figure 8 It is a schematic diagram of a wind power cumulative probability curve in a specific application example of the present invention;

[0042] Fig. 9 It is a wiring diagram of a new energy station in a specific application example of the present invention;

[0043] Fig.10 The structure of the phase regulator determination device applicable to the new energy station in the embodiment of the present invention is shown in FIG. Figure 1 ;

[0044] Fig.11 This is a schematic diagram of the structure of the phase regulator access module in an embodiment of the present invention;

[0045] Fig.12 The structure of the phase regulator determination device applicable to the new energy station in the embodiment of the present invention is shown in FIG. Figure 2 ;

[0046] Fig.13 Schematic diagram of the structure of a module for determining the amount of power that can be discarded in an embodiment of the present invention;

[0047] Fig.14 It is a schematic diagram of the structure of an electronic device in an embodiment of the present invention. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0050] It should be noted that the terms "including" and "having" and any variations thereof in the specification and claims of the present application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or apparatuses.

[0051] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0052] At present, more and more energy stations have considered deploying distributed small-scale phase regulators to improve the voltage support capacity of new energy stations to the power grid. Therefore, it is necessary to propose a phase regulator configuration method suitable for new energy stations to improve the short-circuit ratio index of new energy stations and improve the new energy transmission capacity, thereby improving the utilization rate of new energy resources.

[0053] Phase regulators can effectively increase the short-circuit capacity of the system, enhance the voltage support strength of the power grid, and improve the voltage support capacity of the power grid when disturbances occur. Large phase regulators are mainly used in UHV DC to improve the phase commutation failure of the receiving system and suppress the overvoltage of the sending system. At the sending end of UHV DC, there are also related technologies that deploy distributed phase regulators at new energy collection stations to improve the overall short-circuit ratio level in the collection area. However, for new energy stations, under the condition that the short-circuit capacity market has not yet been formed, there is no experience to follow on how to form a deployment plan for distributed small phase regulators within a single new energy station.

[0054] In summary, the existing technology lacks a method to analyze the short-circuit capacity support capability requirements of new energy stations from the perspective of new energy power consumption, and based on this method, a distributed phase-shifting phase configuration method is proposed that takes into account the new energy power consumption needs and the short-circuit ratio index requirements of multiple new energy stations.

[0055] Based on the above technical pain points, the embodiment of the present invention provides a specific implementation method of a phase regulator determination method applicable to a new energy station, see Figure 1 , the method specifically includes the following contents:

[0056] Step 100: connecting multiple phase-shifting units to the new energy station in order of capacity from small to large until a preset stop connection condition is reached;

[0057] It can be understood that the phase regulator is a reactive power compensation device, a synchronous motor that provides or absorbs reactive power to the power system, and is a synchronous motor in a special operating state. When applied to the power system, it can automatically increase reactive output when the grid voltage drops according to the needs of the system. Specifically, when the grid voltage rises, the phase regulator absorbs reactive power to maintain the voltage, improve the stability of the power system, and improve the power supply quality of the system.

[0058] When step 100 is implemented, specifically, firstly sort the multiple phase regulators from small to large according to capacity, and starting from the phase regulator with the smallest capacity, select one phase regulator from the phase regulator capacity series (multiple phase regulators) in turn to connect to the new energy station.

[0059] Step 200: When each phase regulator is individually connected to the new energy station, determine the short-circuit ratio between the new energy station and multiple new energy stations at its grid connection point, and the connection stop condition is that the short-circuit ratio is greater than the minimum short-circuit ratio of the new energy station.

[0060] It should be noted that step 200 is to calculate the short-circuit ratio between each of the multiple phase-converters in step 100 when the phase-converter is connected to the new energy station and the multiple new energy stations at its grid connection point, rather than calculating the short-circuit ratio of the multiple phase-converters connected to the new energy station cumulatively. In addition, it is necessary to pre-store the multiple phase-converters corresponding to the conditions for stopping connection that have not been met as input data for step 300.

[0061] Step 300: Determine the phase regulators required for the new energy station and the quantity of the phase regulators according to the phase regulators corresponding to the multiple short-circuit ratios.

[0062] Specifically, first, a phase regulator set is formed based on the multiple phase regulators pre-stored in step 200, and then the phase regulators required for the new energy station and the corresponding number of the required phase regulators are determined based on the number of elements in the phase regulator set and the capacity corresponding to the elements (phase regulators).

[0063] From the above description, it can be seen that the method for determining phase regulators suitable for new energy stations provided in an embodiment of the present invention determines the required phase regulator types and quantities according to the new energy resource curve of the new energy station and the type of new energy units. On the one hand, it meets the simultaneity requirements of the power consumption demand of the new energy station, and on the other hand, it takes into account the short-circuit ratio indicators of multiple new energy stations and the harsh operating conditions of the power grid near the area, and finally forms a phase regulator deployment plan in the new energy station.

[0064] In one embodiment, see Figure 2 , step 100 comprises:

[0065] Step 101: determining a corresponding simultaneous rate according to the maximum amount of power that can be abandoned by the new energy station within a preset period;

[0066] Specifically, first obtain the power curve within a preset period (preferably one year), and calculate the total power from it, then calculate the maximum discardable power based on the total power, and finally determine the concurrency requirement corresponding to the preset period based on the maximum discardable power.

[0067] Step 102: When the new energy station meets the simultaneity rate, the multiple phase-shifting machines are connected to the new energy station in order from small to large capacity.

[0068] It is not difficult to understand that no matter how the phase regulators and their number are selected, the new energy stations need to meet the simultaneity requirements of the power consumption demand, so step 100 needs to be performed under this condition.

[0069] In one embodiment, see Figure 3 The phase regulator determination method applicable to new energy stations also includes:

[0070] Step 400: Determine the maximum amount of power that can be discarded. Figure 4 , step 400 further comprises:

[0071] Step 401: Obtaining a power curve of the new energy station;

[0072] Step 402: Determine the total power of the new energy station according to the power curve;

[0073] In step 401 and step 402, the historical power data of the new energy station is first obtained, and the station wind power curve P is generated accordingly. n =g(s s ), Pn Sorting from large to small to get the wind power cumulative probability curve F n , and calculate the annual power consumption according to the wind power cumulative probability curve

[0074] Step 403: Determine the maximum amount of wasted electricity based on the total amount of electricity and the resource utilization target value of the new energy station.

[0075] Specifically, the maximum amount of wasted electricity is calculated according to the following formula:

[0076]

[0077] In the above formula, η% is the target value of resource utilization rate of new energy stations.

[0078] In one embodiment, on the basis of steps 401 to 403, step 101 is specifically: under the condition that the following formula is satisfied, The wind power cumulative probability curve F is calculated in order from small to large. n Sum, and we can get F x Finally, the simultaneous rate requirement F corresponding to the resource utilization target value η% of the new energy station can be obtained. x / M.

[0079] In one embodiment, step 200 specifically includes:

[0080] Step 201: Determine the short-circuit ratio according to the system short-circuit capacity, active power, mutual impedance and self-impedance when the new energy station is connected to the grid connection point.

[0081] Specifically, the new energy output of the new energy station is set to F x The output of other renewable energy stations in the vicinity is set according to the existing transmission limit, and the thermal power units are set according to the minimum startup setting. The multi-station short-circuit ratio index MRSCR0 of the unit end and the grid connection point of this renewable energy station under the above method is calculated. The calculation formula of MRSCR is:

[0082]

[0083] In the above formula, S aci is the system short-circuit capacity at the new energy station / generation unit i; P REi , P REj is the active power input into the grid by the new energy station / generation unit i, j; where the mutual impedance and self-impedance are both from the node impedance matrix. Assuming that the grid has n nodes before the phase regulator is added, the n-order impedance matrix Z can be obtained.

[0084] In one embodiment, the n-th order impedance matrix Z is defined by the following formula:

[0085]

[0086] In one embodiment, the maximum number of distributed phase regulators that can be deployed in a new energy station can be determined based on the installed capacity of the target new energy station, new energy resource data, the power generation curve of the new energy generator set, the utilization target value of the new energy resources, the optional capacity series of distributed phase regulators, and the area of ​​the new energy station.

[0087] To further illustrate the present solution, the present invention takes a wind farm in a certain region as an example to provide a specific application example of a method for determining a phase shifter for a new energy station, which specifically includes the following contents, see Figure 5 as well as Figure 6 .

[0088] S1: Determine the maximum number of deployable phase regulators.

[0089] Input data include: installed capacity of new energy field M, typical new energy resource data of the field station S = {s1...s n}(S is the wind speed or sunshine of the station, n=8760 or 35040, corresponding to the average new energy resources per hour or every 15 minutes throughout the year), the power generation curve g(s) of the new energy generator set of the station, the target value of new energy resource utilization η%, the optional capacity series of distributed phase regulator R={R1...R n}, according to the available land area of ​​the station, the maximum number of phase regulators that can be deployed is D max ;

[0090] S2: Determine the simultaneous rate requirements corresponding to the resource utilization target value that the target new energy station meets.

[0091] First, generate the annual wind power curve P of the station n =g(s s ), then P n Sorting from large to small to get the wind power cumulative probability curve F n , calculate the annual power consumption Finally, the maximum amount of power that can be discarded can be calculated according to the following formula:

[0092]

[0093] F n Sum until Get F x , thus the simultaneous rate requirement F corresponding to the target value η% of the utilization rate of new energy resources can be obtained. x / M.

[0094] Specific actual data include: the wind resource power curve of the station in 2021 is as follows: Figure 7As shown, the wind power cumulative probability curve can be calculated as follows Figure 8 As shown, η% = 95%, the optional tunable phase capacity sequence R = {10MVar, 20MVar, 30MVar, 50MVar}, and the maximum number of deployable units D max =2, the minimum multi-station short-circuit ratio index is MRSCR min =1.5.

[0095] First, according to the wind power resource curve and the wind power cumulative probability curve, the output and simultaneity requirements F corresponding to the target value of 95% of the new energy resource utilization rate of the station are obtained. x =147MW, F x / M=73.5%.

[0096] S3: Under the premise of meeting the simultaneity requirements, determine the phase-shifting configuration plan for the target new energy station.

[0097] Furthermore, step S3 further comprises:

[0098] S31: First, set the station's new energy output to F x The output of other renewable energy stations in the vicinity is set according to the existing transmission limit, and the thermal power units are considered to be started at the minimum. The multi-station short-circuit ratio index MRSCR0 of the renewable energy unit terminal and the grid connection point of this station is calculated under this method. If MRSCR0 is greater than the minimum multi-station short-circuit ratio requirement MRSCR min , end; otherwise, proceed to the next step. The calculation formula of MRSCR is:

[0099]

[0100] S aci is the system short-circuit capacity at the new energy station / generation unit i; P REi , P REj is the active power input to the grid by the new energy station / generation unit i, j; where the mutual impedance and self-impedance are both from the node impedance matrix. Assuming that the grid has n nodes before the phase regulator is added, the n-order impedance matrix Z can be obtained:

[0101]

[0102] S32: In order from small to large, the phase condenser capacity series R = {R1...R n}Select the capacity as R i The phase regulator is connected to the 35kV busbar of the new energy station, and the short-circuit ratio index MRSCR of multiple stations is calculated at this time. i , if MRSCR i Greater than the minimum multi-station short-circuit ratio requirement MRSCR min, then proceed to the next step. Otherwise, repeat step S32 to select a capacity of R i+1 The condenser is connected to the 35kV busbar of the new energy station until R n If we calculate the multi-station short-circuit ratio index MRSCR at this time n Still less than MRSCR min , then increase the number of phase regulators D, repeat step S32, if the number of phase regulators D>D max , end the calculation.

[0103] S33: Calculate the total capacity of the additional phase regulator as R n ×(D-1)+R i , from the phase regulator series R = {R1...R n}Select a capacity slightly larger than (R n ×(D-1)+R i ) / D phase regulator R s The final phase shifter configuration scheme for the new energy station was determined to be D stage R s Adjust the camera.

[0104] The specific practical solution is to set the new energy output of the station to F x =147MW, the output of other renewable energy stations in the vicinity is set according to the existing transmission limit, and the thermal power units are considered to be started at the minimum capacity (see Fig. 9 ), calculate the short-circuit ratio index of the new energy unit terminal and the grid connection point of the station under this method MRSCR0 = 0.865, which is less than MRSCR min , select a 50MVar condenser from the condenser capacity sequence, and calculate the short circuit ratio index MRSCR i =1.412, which is still less than MRSCR min Therefore, the second 10MVar condenser is selected from the condenser capacity sequence, and the MRSCR is configured i =1.531 greater than MRSCR min Therefore, the final configuration selected for the station is 2 30MVar distributed phase regulators.

[0105] From the above description, it can be seen that the method for determining the phase regulators applicable to the new energy station provided by the embodiment of the present invention includes: first, connecting multiple phase regulators to the new energy station in order from small to large in capacity, until the preset stop access condition is reached; then, when each phase regulator is connected to the new energy station alone, determining the short-circuit ratio between the new energy station and multiple new energy stations at its grid connection point, and the stop access condition is that the short-circuit ratio is greater than the minimum short-circuit ratio of the new energy station; finally, determining the phase regulators required for the new energy station and the number of the phase regulators according to the phase regulators corresponding to the multiple short-circuit ratios. The present invention more accurately formulates the deployment plan of distributed small phase regulators while taking into account the power consumption demand of the new energy station and the short-circuit ratio index requirements of multiple new energy stations, thereby increasing the utilization rate of new energy resources to the target value.

[0106] Based on the same inventive concept, the embodiments of the present application also provide a phase regulator determination device applicable to a new energy station, which can be used to implement the method described in the above embodiments, such as the following embodiments. Since the principle of solving the problem by the phase regulator determination device applicable to a new energy station is similar to the phase regulator determination method applicable to a new energy station, the implementation of the phase regulator determination device applicable to a new energy station can refer to the implementation of the phase regulator determination method applicable to a new energy station, and the repeated parts will not be repeated. As used below, the term "unit" or "module" can be a combination of software and / or hardware that implements predetermined functions. Although the system described in the following embodiments is preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceived.

[0107] The embodiment of the present invention provides a specific implementation of a phase regulator determination device applicable to a new energy station that can implement a phase regulator determination method applicable to a new energy station, see Fig.10 The phase-shifting determination device applicable to new energy stations specifically includes the following contents:

[0108] A phase regulator access module 10, used to sequentially access multiple phase regulators in order of capacity from small to large to the new energy station until a preset stop access condition is reached;

[0109] The short circuit ratio determination module 20 is used to determine the short circuit ratio between the new energy station and multiple new energy stations at its grid connection point when each phase regulator is individually connected to the new energy station, and the connection stop condition is that the short circuit ratio is greater than the minimum short circuit ratio of the new energy station;

[0110] The phase regulator determination module 30 is used to determine the phase regulators required by the new energy station and the number of the phase regulators according to the phase regulators corresponding to the multiple short-circuit ratios.

[0111] In one embodiment, see Fig.11, the phase regulator access module 10 comprises:

[0112] A simultaneous rate determination unit 101 is used to determine a corresponding simultaneous rate according to a maximum amount of power that can be abandoned by the new energy station within a preset period;

[0113] The phase regulator access unit 102 is used to connect the multiple phase regulators to the new energy station in order from small to large capacity when the new energy station meets the simultaneity rate.

[0114] In one embodiment, see Fig.12 The phase regulator determination device applicable to the new energy station also includes: a discardable power determination module 40, which is used to determine the maximum discardable power, see Fig.13 The discardable power determination module 40 includes:

[0115] A power curve generating unit 401 is used to obtain a power curve of the new energy station;

[0116] A total power generation unit 402 is used to determine the total power of the new energy station according to the power curve;

[0117] The abandonable power determination unit 403 is used to determine the maximum abandonable power according to the total power and the resource utilization target value of the new energy station.

[0118] In one embodiment, the short-circuit ratio determination module 20 is specifically used to determine the short-circuit ratio according to the system short-circuit capacity, active power, mutual impedance and self-impedance when the new energy station is connected to the grid connection point.

[0119] From the above description, it can be seen that the phase regulator determination device suitable for the new energy station provided by the embodiment of the present invention includes: first, connecting multiple phase regulators to the new energy station in order from small to large according to the capacity of the phase regulators, until the preset stop access condition is reached; then, when each phase regulator is connected to the new energy station alone, the short circuit ratio between the new energy station and multiple new energy stations at its grid connection point is determined, and the stop access condition is that the short circuit ratio is greater than the minimum short circuit ratio of the new energy station; finally, the phase regulators required for the new energy station and the number of the phase regulators are determined according to the phase regulators corresponding to the multiple short circuit ratios. The present invention more accurately formulates the deployment plan of distributed small phase regulators while taking into account the power consumption demand of the new energy station and the short circuit ratio index requirements of multiple new energy stations, thereby increasing the utilization rate of new energy resources to the target value.

[0120] The embodiment of the present application also provides a specific implementation of an electronic device capable of implementing all steps in the phase shifter determination method applicable to a new energy station in the above embodiment, see Fig.14 , electronic equipment specifically includes the following:

[0121] Processor (processor) 1201, memory (memory) 1202, communication interface (CommunicationsInterface) 1203 and bus 1204;

[0122] The processor 1201 , the memory 1202 , and the communication interface 1203 communicate with each other via the bus 1204 ; the communication interface 1203 is used to realize information transmission between relevant devices such as the server-side device, the power measurement device, and the user-side device.

[0123] The processor 1201 is used to call the computer program in the memory 1202. When the processor executes the computer program, all the steps in the method for determining the phase regulator applicable to the new energy station in the above embodiment are implemented. For example, when the processor executes the computer program, the following steps are implemented:

[0124] Step 100: connecting multiple phase-shifting units to the new energy station in order of capacity from small to large until a preset stop connection condition is reached;

[0125] Step 200: When each phase regulator is connected to the new energy station separately, determine the short-circuit ratio between the new energy station and multiple new energy stations at its grid connection point, and the connection stop condition is that the short-circuit ratio is greater than the minimum short-circuit ratio of the new energy station;

[0126] Step 300: Determine the phase regulators required for the new energy station and the quantity of the phase regulators according to the phase regulators corresponding to the multiple short-circuit ratios.

[0127] The embodiments of the present application also provide a computer-readable storage medium capable of implementing all the steps of the method for determining a phase regulator applicable to a new energy station in the above embodiment. The computer-readable storage medium stores a computer program. When the computer program is executed by a processor, all the steps of the method for determining a phase regulator applicable to a new energy station in the above embodiment are implemented. For example, when the processor executes the computer program, the following steps are implemented:

[0128] Step 100: connecting multiple phase-shifting units to the new energy station in order of capacity from small to large until a preset stop connection condition is reached;

[0129] Step 200: When each phase regulator is connected to the new energy station separately, determine the short-circuit ratio between the new energy station and multiple new energy stations at its grid connection point, and the connection stop condition is that the short-circuit ratio is greater than the minimum short-circuit ratio of the new energy station;

[0130] Step 300: Determine the phase regulators required for the new energy station and the quantity of the phase regulators according to the phase regulators corresponding to the multiple short-circuit ratios.

[0131] In summary, the computer-readable storage medium provided in the embodiment of the present invention can support the service provider to adaptively go offline and online the service according to the availability of its own software and hardware resources, thereby realizing the self-isolation capability of the service provider and ensuring the success rate of the service provider's response to service requests.

[0132] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the hardware + program embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0133] The above is a description of a specific embodiment of the specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0134] Although the present application provides method operation steps such as embodiments or flow charts, more or fewer operation steps may be included based on conventional or non-creative labor. The order of steps listed in the embodiments is only one way of executing the order of many steps and does not represent the only execution order. When the actual device or client product is executed, it can be executed in the order of the method shown in the embodiments or the drawings or in parallel (for example, in a parallel processor or multi-threaded processing environment).

[0135] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0136] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0137] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0138] The present invention uses specific embodiments to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A method for determining a phase regulator suitable for a new energy station, characterized in that: include: Connecting multiple phase-shifters to the new energy station in order of capacity from small to large until a preset stop connection condition is reached; In the case where each phase regulator is connected to the new energy station separately, the short-circuit ratio between the new energy station and multiple new energy stations at its grid connection point is determined, and the connection stop condition is that the short-circuit ratio is greater than the minimum short-circuit ratio of the new energy station; Determine the phase regulators required for the new energy station and the number of the phase regulators according to the phase regulators corresponding to the multiple short-circuit ratios; The determining the phase regulators required by the new energy station and the number of the phase regulators according to the phase regulators corresponding to the multiple short-circuit ratios includes: Step S31: First, the station's new energy output is set to F x The output of other renewable energy stations in the vicinity is set according to the existing transmission limit, and the thermal power units are considered to be started at the minimum. The multi-station short-circuit ratio index MRSCR0 of the renewable energy unit terminal and the grid connection point of this station is calculated under this method. If MRSCR0 is greater than the minimum multi-station short-circuit ratio requirement MRSCR min , end; otherwise proceed to the next step, where the calculation formula of MRSCR is: S aci is the system short-circuit capacity at the new energy station / generation unit i; P REi , P REj is the active power input to the grid by the new energy station / generation unit i, j; where the mutual impedance and self-impedance are both from the node impedance matrix. Assuming that the grid has n nodes before the phase regulator is added, the n-order impedance matrix Z is obtained: Step S32: select the phase regulator capacity series R={R1...R n }Select the capacity as R i The phase regulator is connected to the new energy station collection busbar, and the multi-station short-circuit ratio index MRSCR is calculated at this time i If MRSCR i Greater than the minimum multi-station short-circuit ratio requirement MRSCR min , then proceed to the next step; otherwise, repeat step S32 to select a capacity of R i+1 The condenser is connected to the new energy station collection bus until R n If we calculate the multi-station short-circuit ratio index MRSCR at this time n Still less than MRSCR min , then increase the number of phase regulators D, repeat step S32, if the number of phase regulators D>D max , end the calculation; S33: Calculate the total capacity of the additional phase regulator as R n ×(D-1)+R i , from the phase regulator series R = {R1...R n }Select a capacity slightly larger than (R n ×(D-1)+R i ) / D phase regulator R s ; and finally determined that the phase-shifting configuration scheme of the new energy station is D platform R s Adjust the camera.

2. The method for determining a phase regulator according to claim 1, characterized in that: The plurality of phase regulators are connected to the new energy station in order of capacity from small to large, including: Determine the corresponding simultaneous rate according to the maximum amount of electricity that can be abandoned by the new energy station within a preset period; When the new energy station meets the simultaneity rate, the multiple phase-shifting machines are connected to the new energy station in order from small to large capacity.

3. The method for determining a phase condenser according to claim 2, characterized in that: The method for determining the maximum amount of discardable electricity comprises the following steps: Obtaining a power curve of the new energy station; Determine the total power of the new energy station according to the power curve; The maximum amount of wasted electricity is determined according to the total amount of electricity and the resource utilization target value of the new energy station.

4. A phase regulator determination device suitable for a new energy station, characterized in that: include: A phase regulator access module, used to sequentially access multiple phase regulators in order of capacity from small to large to the new energy station until a preset stop access condition is reached; A short circuit ratio determination module, used for determining the short circuit ratio between the new energy station and multiple new energy stations at its grid connection point when each phase regulator is separately connected to the new energy station, wherein the stop connection condition is that the short circuit ratio is greater than the minimum short circuit ratio of the new energy station; A phase regulator determination module, used to determine the phase regulators required by the new energy station and the number of the phase regulators according to the phase regulators corresponding to the multiple short-circuit ratios; The determining the phase regulators required by the new energy station and the number of the phase regulators according to the phase regulators corresponding to the multiple short-circuit ratios includes: Step S31: First, the station's new energy output is set to F x The output of other renewable energy stations in the vicinity is set according to the existing transmission limit, and the thermal power units are considered to be started at the minimum. The multi-station short-circuit ratio index MRSCR0 of the renewable energy unit terminal and the grid connection point of this station is calculated under this method. If MRSCR0 is greater than the minimum multi-station short-circuit ratio requirement MRSCR min , end; otherwise proceed to the next step, where the calculation formula of MRSCR is: S aci is the system short-circuit capacity at the new energy station / generation unit i; P REi , P REj is the active power input to the grid by the new energy station / generation unit i, j; where the mutual impedance and self-impedance are both from the node impedance matrix. Assuming that the grid has n nodes before the phase regulator is added, the n-order impedance matrix Z is obtained: Step S32: select the phase-shifting capacity series R={R1...R n }Select the capacity as R i The phase regulator is connected to the new energy station collection busbar, and the multi-station short-circuit ratio index MRSCR is calculated at this time i , if MRSCR i Greater than the minimum multi-station short-circuit ratio requirement MRSCR min , then proceed to the next step; otherwise, repeat step S32 to select a capacity of R i+1 The condenser is connected to the new energy station collection bus until R n If we calculate the multi-station short-circuit ratio index MRSCR at this time n Still less than MRSCR min , then increase the number of phase regulators D, repeat step S32, if the number of phase regulators D>D max , end the calculation; S33: Calculate the total capacity of the additional phase regulator as R n ×(D-1)+R i , from the phase regulator series R = {R1...R n }Select a capacity slightly larger than (R n ×(D-1)+R i ) / D phase regulator R s ; and finally determined that the phase-shifting configuration scheme of the new energy station is D platform R s Adjust the camera.

5. The phase modulator determination device according to claim 4, characterized in that: The phase regulator access module comprises: A simultaneous rate determination unit, configured to determine a corresponding simultaneous rate according to a maximum amount of discarded electricity of the new energy station within a preset period; The phase regulator access unit is used to connect the multiple phase regulators to the new energy station in order from small to large capacity when the new energy station meets the simultaneity rate.

6. The phase regulator determination device according to claim 5, characterized in that: Also includes: A discardable power determination module is used to determine the maximum discardable power. The discardable power determination module includes: A power curve generating unit, used for obtaining a power curve of the new energy station; A total power generation unit, used to determine the total power of the new energy station according to the power curve; The abandonable power determination unit is used to determine the maximum abandonable power according to the total power and the resource utilization target value of the new energy station.

7. A computer program product comprising a computer program / instructions, characterized in that When the computer program / instruction is executed by a processor, the steps of the phase regulator determination method applicable to a new energy station as described in any one of claims 1 to 3 are implemented.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the steps of the phase regulator determination method applicable to a new energy station as described in any one of claims 1 to 3 are implemented.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the phase regulator determination method applicable to a new energy station as described in any one of claims 1 to 3 are implemented.

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