Capacity configuration method and device for phase modifier

Abstract

The invention provides a capacity configuration method and device for a phase modifier. The method comprises the following steps: acquiring short-circuit capacity, station output and a power conversion factor after a new energy system is provided with the phase modifier; judging whether the new energy system meets a preset short-circuit ratio constraint condition or not according to the short-circuit capacity, the field station output and the power conversion factor; if the new energy system meets the short-circuit ratio constraint condition, generating an output limit of each new energy station according to the station output; judging whether each output limit is smaller than a preset first threshold value or not; and if the output limits are smaller than the first threshold value, improving the capacity of the phase modifier and iteratively executing the steps until all the output limits are not smaller than the first threshold value. According to the method and the device for configuring the capacity of the phase modifier, the configuration of the phase modifier in a power system is optimized, and the stability of a power grid and the access capability of new energy are improved.

Description

Technical Field

[0001] The present application relates to the technical field of power systems, and in particular to a method and device for configuring phase shifter capacity. Background Art

[0002] As the degree of electrification increases, a stable power system becomes increasingly important. In the power system, short-circuit capacity refers to the maximum current value that the power grid can withstand under certain conditions, and is an important indicator for measuring the stability of the power system. With the rapid development of new energy power generation, especially the increase in distributed energy resources, the short-circuit capacity of the power grid has been challenged unprecedentedly. The current technical means have various deficiencies and it is difficult to solve this problem. For this reason, the power market has introduced a short-circuit capacity compensation mechanism to encourage power generation companies and users to participate in the maintenance and improvement of short-circuit capacity through economic incentives.

[0003] By configuring distributed phase-shifters at new energy stations, the short-circuit ratio of the stations can be increased, thereby improving the transmission capacity. However, considering the power generation income of new energy stations and the investment and operation and maintenance costs of phase-shifters, there is still a lack of directional analysis and calculation methods and evaluation indicators for selecting the appropriate phase-shifter configuration capacity. Summary of the invention

[0004] In view of the problems in the prior art, the embodiments of the present application provide a phase modulator capacity configuration method and device, which can at least partially solve the problems in the prior art.

[0005] In a first aspect, the present application provides a method for configuring phase condenser capacity, comprising:

[0006] Obtain the short-circuit capacity, station output and power conversion factor of the new energy system after installing the phase regulator;

[0007] Determining whether the new energy system meets a preset short-circuit ratio constraint condition according to the short-circuit capacity, the station output and the power conversion factor;

[0008] If the new energy system meets the short-circuit ratio constraint condition, the output limit of each new energy station is generated according to the station output;

[0009] Determining whether each of the output limits is less than a preset first threshold;

[0010] If there is an output limit less than the first threshold, the capacity of the phase regulator is increased and the above steps are iteratively performed until all the output limits are not less than the first threshold.

[0011] Furthermore, it also includes:

[0012] If the new energy system does not meet the short circuit ratio constraint condition, increase the capacity of the phase regulator and iteratively perform the following steps until the new energy system meets the short circuit ratio constraint condition:

[0013] Obtaining the short-circuit capacity, station output and power conversion factor after increasing the capacity of the phase regulator;

[0014] It is determined whether the new energy system meets the preset short-circuit ratio constraint condition according to the short-circuit capacity after increasing the capacity of the phase regulator, the station output and the power conversion factor.

[0015] Furthermore, judging whether the new energy system meets a preset short circuit ratio constraint condition according to the short circuit capacity, the station output and the power conversion factor includes:

[0016] Generate a short-circuit ratio of each new energy station according to the short-circuit capacity, the station output and the power conversion factor;

[0017] Determining whether each of the short-circuit ratios is greater than a preset minimum required short-circuit ratio;

[0018] If there is a short circuit ratio that is not greater than the minimum required short circuit ratio, the new energy system does not meet the short circuit ratio constraint condition; if all the short circuit ratios are greater than the minimum required short circuit ratio, the new energy system meets the short circuit ratio constraint condition.

[0019] Furthermore, it also includes:

[0020] When the output limits are not less than the first threshold, generating an economic indicator according to the current capacity of the phase regulator;

[0021] It is determined whether the economic indicator is less than a preset second threshold.

[0022] In a second aspect, the present application provides a phase-shifting capacity configuration device, comprising:

[0023] The first data acquisition unit is used to obtain the short-circuit capacity, station output and power conversion factor of the new energy system after the phase regulator is installed;

[0024] A first judgment unit, configured to judge whether the new energy system meets a preset short circuit ratio constraint condition according to the short circuit capacity, the station output and the power conversion factor;

[0025] An output limit generating unit, configured to generate an output limit of each new energy station according to the station output if the new energy system satisfies the short circuit ratio constraint condition;

[0026] A second judgment unit, used to judge whether each of the output limits is less than a preset first threshold;

[0027] The first iterative operation unit is used to increase the capacity of the phase regulator and iteratively execute the above steps until all the output limits are not less than the first threshold if there is an output limit less than the first threshold.

[0028] Furthermore, it also includes:

[0029] The second iterative operation unit is used to increase the capacity of the phase modulator and iteratively perform the following steps until the new energy system meets the short circuit ratio constraint condition if the new energy system does not meet the short circuit ratio constraint condition:

[0030] A second data acquisition unit is used to acquire the short-circuit capacity, station output and power conversion factor after increasing the capacity of the phase regulator;

[0031] The third judgment unit is used to judge whether the new energy system meets the preset short-circuit ratio constraint condition according to the short-circuit capacity after the capacity of the phase regulator is increased, the station output and the power conversion factor.

[0032] Furthermore, the first determining unit includes:

[0033] A short circuit ratio generation module, used to generate the short circuit ratio of each new energy station according to the short circuit capacity, the station output and the power conversion factor;

[0034] A short circuit ratio judgment module, used to judge whether each of the short circuit ratios is greater than a preset minimum required short circuit ratio;

[0035] The judgment result determination module is used to determine that if there is a short-circuit ratio that is not greater than the minimum required short-circuit ratio, the new energy system does not meet the short-circuit ratio constraint condition; if all the short-circuit ratios are greater than the minimum required short-circuit ratio, the new energy system meets the short-circuit ratio constraint condition.

[0036] Furthermore, it also includes:

[0037] An economic indicator generating unit, configured to generate an economic indicator according to the current capacity of the phase regulator when the output limits are not less than the first threshold value;

[0038] The economic indicator judgment unit is used to judge whether the economic indicator is less than a preset second threshold.

[0039] In a third aspect, the present application provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the method described in any one of the above embodiments when executing the computer program.

[0040] In a fourth aspect, the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method described in any of the above embodiments is implemented.

[0041] In a fifth aspect, the present application provides a computer program product, wherein the computer program product includes a computer program, and when the computer program is executed by a processor, the method described in any of the above embodiments is implemented.

[0042] The phase-shifting capacity configuration method and device provided in the present application obtain the short-circuit capacity, station output and power conversion factor of the new energy system after the phase-shifting is installed; judge whether the new energy system meets the preset short-circuit ratio constraint condition according to the short-circuit capacity, the station output and the power conversion factor; if the new energy system meets the short-circuit ratio constraint condition, generate the output limit of each new energy station according to the station output; judge whether each output limit is less than the preset first threshold; if there is an output limit less than the first threshold, increase the capacity of the phase-shifting and iterate the above steps until each output limit is not less than the first threshold, thereby optimizing the configuration of the phase-shifting in the power system and improving the stability of the power grid and the access capacity of new energy. Among them, by accurately calculating and configuring the capacity of the phase-shifting, the short-circuit capacity of the power system is effectively improved; by judging the economic indicators, the stable operation and long-term benefits of the phase-shifting are ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the embodiments of the present application 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 only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0044] Figure 1 It is a flow chart of a method for configuring phase-shifting capacity provided by an embodiment of the present application;

[0045] Figure 2 It is a flow chart of a method for configuring phase-shifting capacity provided by an embodiment of the present application;

[0046] Figure 3 It is a flow chart of a method for configuring phase-shifting capacity provided by an embodiment of the present application;

[0047] Figure 4 It is a flow chart of a method for configuring phase-shifting capacity provided by an embodiment of the present application;

[0048] Figure 5It is a structural schematic diagram of a phase regulator capacity configuration device provided in an embodiment of the present application;

[0049] Figure 6 It is a structural schematic diagram of a phase regulator capacity configuration device provided in an embodiment of the present application;

[0050] Figure 7 It is a structural schematic diagram of a phase regulator capacity configuration device provided in an embodiment of the present application;

[0051] Figure 8 It is a structural schematic diagram of a phase regulator capacity configuration device provided in an embodiment of the present application;

[0052] Fig. 9 It is a schematic diagram of the physical structure of an electronic device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the embodiments of the present application are further described in detail below in conjunction with the accompanying drawings. Here, the illustrative embodiments of the present application and their descriptions are used to explain the present application, but are not intended to limit the present application. It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0054] The following uses a server as an example of an execution subject to illustrate the specific implementation process of the phase-shifting capacity configuration method provided in the embodiment of the present application.

[0055] Figure 1 is a flow chart of a method for configuring the phase-shifting capacity provided by an embodiment of the present application, such as Figure 1 As shown, the phase-shifting capacity configuration method provided in this application includes:

[0056] S101: Obtain the short-circuit capacity, station output and power conversion factor of the new energy system after the phase regulator is installed;

[0057] S102: judging whether the new energy system meets a preset short circuit ratio constraint condition according to the short circuit capacity, the station output and the power conversion factor;

[0058] S103: if the new energy system satisfies the short-circuit ratio constraint condition, generating the output limit of each new energy station according to the station output;

[0059] S104: Determine whether each of the output limits is less than a preset first threshold;

[0060] S105: If there is an output limit that is less than the first threshold, increase the capacity of the phase regulator and iteratively execute the above steps until all the output limits are not less than the first threshold.

[0061] from Figure 1 It can be seen from the shown process that the phase modulator capacity configuration method provided in the present application obtains the short-circuit capacity, station output and power conversion factor of the new energy system after the phase modulator is installed; judges whether the new energy system meets the preset short-circuit ratio constraint condition according to the short-circuit capacity, the station output and the power conversion factor; if the new energy system meets the short-circuit ratio constraint condition, generates the output limit of each new energy station according to the station output; judges whether each of the output limits is less than a preset first threshold; if there is an output limit less than the first threshold, increases the capacity of the phase modulator and iterates the above steps until each of the output limits is not less than the first threshold, thereby optimizing the configuration of the phase modulator in the power system and improving the stability of the power grid and the access capacity of new energy.

[0062] Each step is explained in detail below.

[0063] S101: Obtain the short-circuit capacity, station output and power conversion factor of the new energy system after the phase regulator is installed;

[0064] Specifically, the phase regulator exhibits excellent overload capacity, and its reactive output remains stable even when the system voltage fluctuates. Under strong excitation, the phase regulator can provide reactive output up to more than twice the rated capacity, which enables it to provide strong reactive support when a long-lasting fault occurs in the power grid, thereby maintaining the stability of the power grid.

[0065] The server obtains the short-circuit capacity, station output and power conversion factor of the new energy system after the phase regulator is installed. Among them, the short-circuit capacity is an important parameter to measure the stability of the system under short-circuit conditions of the new energy station. After the phase regulator is installed, the short-circuit capacity will change. Through grid model calculation or real-time monitoring, the short-circuit capacity value of the new energy system after the phase regulator is installed can be obtained. The station output includes the actual power generation power of each new energy station. The power conversion factor refers to the power conversion factor after considering the impact of surrounding stations on the station, and its value is related to the mutual impedance.

[0066] S102: judging whether the new energy system meets a preset short circuit ratio constraint condition according to the short circuit capacity, the station output and the power conversion factor;

[0067] Specifically, the short circuit ratio (SCR) is the ratio of the short circuit capacity to the station output, which is used to evaluate the stability of the system. The preset short circuit ratio constraint is the safety standard for system operation. The server determines whether the new energy system meets the preset short circuit ratio constraint based on the short circuit capacity, station output and power conversion factor.

[0068] Figure 2is a flow chart of a method for configuring the phase-shifting capacity provided by an embodiment of the present application, such as Figure 2 As shown, the phase-shifting capacity configuration method provided in this application also includes:

[0069] S201: If the new energy system does not meet the short circuit ratio constraint condition, increase the capacity of the phase regulator and iteratively perform the following steps until the new energy system meets the short circuit ratio constraint condition:

[0070] Specifically, the short-circuit ratio is an important indicator for the stable operation of the new energy system. The server determines whether the new energy system meets the preset short-circuit ratio constraint based on the short-circuit capacity, station output and power conversion factor. When the server determines that the new energy system does not meet the preset short-circuit ratio constraint, it takes measures to adjust, increase the capacity of the phase regulator and re-evaluate the short-circuit ratio of the system to determine whether the new energy system meets the preset short-circuit ratio constraint. As a reactive power compensation device in the power grid, the phase regulator can increase the short-circuit capacity of the system, thereby improving the short-circuit ratio. By iterating this process in a loop, the short-circuit ratio of the system is gradually improved until the short-circuit ratio constraint is met.

[0071] In one embodiment, increasing the capacity of the phase modulator includes increasing the rated capacity of the phase modulator, increasing the number of the phase modulator, or optimizing its operation strategy (such as adjusting reactive power output settings).

[0072] S202: Obtaining the short-circuit capacity, station output and power conversion factor after increasing the capacity of the phase regulator;

[0073] Specifically, after increasing the capacity of the phase regulator, the server re-acquires the short-circuit capacity, station output and power conversion factor after increasing the capacity of the phase regulator. Among them, the short-circuit capacity is an important parameter for measuring the stability of the system of the new energy station under the condition of a short circuit. After the phase regulator is installed, the short-circuit capacity will change. Through power grid model calculation or real-time monitoring, the short-circuit capacity value of the new energy system after the phase regulator is installed can be obtained. The station output includes the actual power generation power of each new energy station. The power conversion factor refers to the power conversion factor after considering the impact of surrounding stations on the station, and its value is related to the mutual impedance.

[0074] S203: Determine whether the new energy system meets a preset short-circuit ratio constraint condition according to the short-circuit capacity after increasing the capacity of the phase regulator, the station output and the power conversion factor.

[0075] Specifically, the short circuit ratio (SCR) is the ratio of the short circuit capacity to the station output, which is used to evaluate the stability of the system. The preset short circuit ratio constraint is the safety standard for the operation of the system. After increasing the capacity of the phase regulator, the server determines whether the new energy system meets the preset short circuit ratio constraint based on the re-acquired short circuit capacity, station output and power conversion factor after increasing the capacity of the phase regulator. If the new energy system meets the preset short circuit ratio constraint, the system stability is guaranteed and the iteration can be terminated; otherwise, it is necessary to return to S201 to continue to increase the phase regulator capacity and repeat the steps.

[0076] Through the above method, the short-circuit ratio of the new energy system can be optimized, stable operation can be ensured, excessive capacity can be avoided at one time, construction and operation costs can be reduced, the grid's ability to accept new energy sites can be significantly improved, and operation risks can be reduced.

[0077] Figure 3 is a flow chart of a method for configuring the phase-shifting capacity provided by an embodiment of the present application, such as Figure 3 As shown, S102 includes:

[0078] S301: generating a short-circuit ratio of each new energy station according to the short-circuit capacity, the station output and the power conversion factor;

[0079] Specifically, the server generates the short-circuit ratio SCR of the new energy station i according to the short-circuit capacity, station output and power conversion factor i It is expressed as follows:

[0080]

[0081] In the formula, S aci Represents the short-circuit capacity of the new energy station and grid connection point, P REi represents the new energy output of new energy station i, P REj represents the new energy output of the surrounding station j of the new energy station i, It represents the power conversion factor after considering the impact of renewable energy station j on renewable energy station i.

[0082] From formula (1), we can see that the main factors affecting the short-circuit ratio of new energy multi-stations are: the system short-circuit capacity of the new energy access point, the new energy output of the station, the new energy output of other surrounding stations, and the mutual impedance / self-impedance between stations. The greater the new energy output of the station and the surrounding stations, the lower the short-circuit ratio of new energy multi-stations. Therefore, under the premise of a certain grid structure of new energy access points, the output of new energy will be limited by the short-circuit ratio of new energy multi-stations.

[0083] In one embodiment, the short-circuit capacity is a sign of the strength of the grid voltage support. A large short-circuit capacity indicates a strong network, and the switching of loads and parallel filters will not cause a large change in the voltage amplitude. On the contrary, a small short-circuit capacity indicates a weak network. The connection of a phase regulator will increase the short-circuit current and then increase the short-circuit capacity. The short-circuit capacity S of the new energy station i aci for:

[0084]

[0085] Where U i is the rated voltage of the new energy station i, I aci is the short-circuit current of the new energy station i.

[0086] S302: Determine whether each of the short-circuit ratios is greater than a preset minimum required short-circuit ratio;

[0087] Specifically, the minimum required short-circuit ratio is a safety constraint for system operation. The server traverses all new energy sites and compares their short-circuit ratios with the preset minimum required short-circuit ratios one by one. If the short-circuit ratio SCR i > minimum required short-circuit MRSCR ratio, the station is considered to meet the operational stability requirements; if the short-circuit ratio SCR i If the short circuit ratio is less than or equal to the minimum required short circuit ratio MRSCR, the station is considered to have stability problems. The short circuit ratio assessment needs to cover all stations to ensure the comprehensiveness and stability of the operation of the entire new energy system.

[0088] In one embodiment, the minimum required short circuit ratio (MRSCR) is set according to the electrical characteristics (such as voltage level, access mode) of the new energy station access point and the grid operation requirements, for example, MRSCR=1.5.

[0089] S303: If there is a short circuit ratio that is not greater than the minimum required short circuit ratio, the new energy system does not meet the short circuit ratio constraint condition; if all the short circuit ratios are greater than the minimum required short circuit ratio, the new energy system meets the short circuit ratio constraint condition.

[0090] Specifically, if the short-circuit ratio of at least one station does not meet the minimum requirement, the entire new energy system is judged to not meet the constraint conditions, which indicates that the system may have an operating risk at the access point of the station and measures need to be taken to improve the short-circuit ratio. If the short-circuit ratios of all stations are higher than the minimum requirement, the new energy system is judged to meet the constraint conditions. At this time, the system operates within a safe and stable range and can proceed to the next step.

[0091] Through the above method, the weak links in the system operation can be identified, which facilitates targeted optimization, ensures that the access of the new energy system will not have a negative impact on the overall stability of the power grid, dynamically adjusts the access method and conditions of the new energy system, and improves the compatibility and acceptance capacity of the power grid for new energy sites.

[0092] S103: if the new energy system satisfies the short-circuit ratio constraint condition, generating the output limit of each new energy station according to the station output;

[0093] Specifically, the output limit refers to the maximum power generation that the station can safely operate under the current short-circuit ratio constraint. After the server determines that the new energy system meets the short-circuit ratio constraint, it generates the output limit α of the new energy station i according to the station output. i It is expressed as follows:

[0094] α i =P REi +P REj (3)

[0095] Where P REi represents the new energy output of new energy station i, P REj Represents the new energy output of the surrounding station j of the new energy station i.

[0096] S104: Determine whether each of the output limits is less than a preset first threshold;

[0097] Specifically, the first threshold is determined according to the system operation requirements and specifies the standard of the station output limit. The server compares the output limit of each station with the first threshold. If the output limits of all stations are greater than or equal to the first threshold, the system meets the operation requirements; otherwise, the system configuration needs to be adjusted.

[0098] In one embodiment, the first threshold value serving as the output limit standard is set to 90%.

[0099] S105: If there is an output limit that is less than the first threshold, increase the capacity of the phase regulator and iteratively execute the above steps until all the output limits are not less than the first threshold.

[0100] Specifically, if the server finds that the output limit of a certain station is less than the first threshold, it means that the current system does not meet the operation requirements. By increasing the capacity of the phase regulator and improving the reactive power support capability, the system short-circuit capacity can be increased, thereby increasing the output limit. After increasing the capacity of the phase regulator, the server re-executes the above steps, re-acquires the short-circuit capacity and station output, and recalculates the output limit under the condition of satisfying the short-circuit ratio constraint until the output limits of all stations meet the first threshold requirement.

[0101] Through the above methods, the safe operation of the new energy system under high penetration rate can be ensured, unnecessary capacity redundancy can be reduced, equipment utilization can be improved, a quantitative analysis basis can be provided for the access of new energy sites, and the ability of the power grid to accept new energy can be enhanced.

[0102] In one embodiment, in view of the large number of nodes in the actual power network and the complex and changeable network structure, a certain degree of deviation may occur in the index calculation. In order to enhance the efficiency of the index calculation and effectively reduce the number of iterative calculations, a 20MVA phase-shifting machine is deployed, and the limit level of new energy transmission under the condition of satisfying the short-circuit ratio constraint is calculated by the power flow simulation software to be 74%. The capacity of the phase-shifting machine is increased to 30MVA, and the limit level of new energy transmission under the condition of satisfying the short-circuit ratio constraint is calculated by the power flow simulation software to be 90%, which meets the preset second threshold.

[0103] Figure 4 is a flow chart of a method for configuring the phase-shifting capacity provided by an embodiment of the present application, such as Figure 4 As shown, the phase-shifting capacity configuration method provided in this application also includes:

[0104] S401: when all the output limits are not less than the first threshold, generating an economic indicator according to the current capacity of the phase regulator;

[0105] Specifically, after the above adjustments, the output limit of each new energy station has met or exceeded the set first threshold (minimum allowable output), and the system operation has entered a relatively stable state, and further economic evaluation can be carried out. The economic indicator β is used to quantify the impact of the current phase-shifting configuration on the system operation cost, including the power consumption cost, construction cost and operation and maintenance cost of the phase-shifting:

[0106] β=F1+F2+F3 (4)

[0107] In the formula, F1 represents the power consumption cost of the phase regulator, F2 represents the construction cost of the phase regulator, and F3 represents the operation and maintenance cost of the phase regulator.

[0108] Among them, the power consumption cost F1 of the phase regulator is calculated as follows:

[0109] F1=Q t *N t *a*P*t*y (5)

[0110] In the formula, Q t is the capacity of the phase regulator, N t is the number of phase-modulators, a is the power loss rate, P is the electricity price, t is the operating time of the phase-modulators, and y is the working life of the phase-modulators.

[0111] The construction cost F2 of the phase regulator is calculated as follows:

[0112] F2=Q t *N t *C (6)

[0113] In the formula, Q t is the capacity of the phase regulator, N t is the number of phase-modulators, and C is the unit construction cost of the phase-modulators.

[0114] The operation and maintenance cost F3 of the condenser is calculated as follows:

[0115] F3=W X *W D (7)

[0116] Where W X W is the cost of minor repairs to the phase regulator. D It is the cost of overhauling the phase regulator. Generally, the phase regulator needs to be repaired every year, with a six-year cycle. In each cycle, the first five years are minor repairs, and the sixth year is a major overhaul.

[0117] S402: Determine whether the economic indicator is less than a preset second threshold.

[0118] Specifically, the second threshold is a benchmark value to measure whether the economic indicator is acceptable, which is usually set by the project budget, industry standards or economic analysis model. The server compares the current economic indicator with the preset second threshold. If the economic indicator is less than the second threshold, the current phase-shifting configuration scheme not only meets the operation requirements, but also has good economic performance; if the economic indicator is not less than the second threshold, the current scheme is not economical, and the phase-shifting configuration needs to be optimized or the scheme needs to be adjusted to ensure that while meeting the technical requirements (such as output limit and short-circuit ratio constraints), the overall system operation scheme also reaches a reasonable level in terms of economy.

[0119] Through the above methods, the sustainable operation of the new energy system can be ensured and more cost-effective solutions can be selected.

[0120] The present application provides a method for configuring the capacity of a phase regulator, which obtains the short-circuit capacity, station output and power conversion factor of the new energy system after installing the phase regulator; determines whether the new energy system meets the preset short-circuit ratio constraint condition according to the short-circuit capacity, the station output and the power conversion factor; if the new energy system meets the short-circuit ratio constraint condition, generates the output limit of each new energy station according to the station output; determines whether each output limit is less than a preset first threshold; if there is an output limit less than the first threshold, increases the capacity of the phase regulator and iterates the above steps until each output limit is not less than the first threshold, thereby optimizing the configuration of the phase regulator in the power system and improving the stability of the power grid and the access capacity of new energy. Among them, by accurately calculating and configuring the capacity of the phase regulator, the short-circuit capacity of the power system is effectively improved; by judging the economic indicators, the stable operation and long-term benefits of the phase regulator are ensured.

[0121] Based on the same inventive concept, the embodiments of the present application also provide a phase-shifting capacity configuration device, which can be used to implement the method described in the above embodiments, as described in the following embodiments. Since the principle of solving the problem by the phase-shifting capacity configuration device is similar to that of the phase-shifting capacity configuration method, the implementation of the phase-shifting capacity configuration device can refer to the implementation of the method based on software performance benchmark determination, 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 conceivable.

[0122] Figure 5 is a schematic diagram of the structure of a phase regulator capacity configuration device provided in an embodiment of the present application, such as Figure 5 As shown, the device comprises:

[0123] The first data acquisition unit 501 is used to obtain the short-circuit capacity, station output and power conversion factor of the new energy system after the phase regulator is installed;

[0124] Specifically, the phase regulator exhibits excellent overload capacity, and its reactive output remains stable even when the system voltage fluctuates. Under strong excitation, the phase regulator can provide reactive output up to more than twice the rated capacity, which enables it to provide strong reactive support when a long-lasting fault occurs in the power grid, thereby maintaining the stability of the power grid.

[0125] The first data acquisition unit 501 obtains the short-circuit capacity, station output and power conversion factor of the new energy system after the phase regulator is installed. Among them, the short-circuit capacity is an important parameter for measuring the stability of the system in the case of a short circuit at the new energy station. After the phase regulator is installed, the short-circuit capacity will change. Through grid model calculation or real-time monitoring, the short-circuit capacity value of the new energy system after the phase regulator is installed can be obtained. The station output includes the actual power generation power of each new energy station. The power conversion factor refers to the power conversion factor after considering the impact of surrounding stations on the station, and its value is related to the mutual impedance.

[0126] A first judgment unit 502 is used to judge whether the new energy system meets a preset short circuit ratio constraint condition according to the short circuit capacity, the station output and the power conversion factor;

[0127] Specifically, the short circuit ratio (SCR) is the ratio of the short circuit capacity to the station output, which is used to evaluate the stability of the system. The preset short circuit ratio constraint is the safety standard for system operation. The first judgment unit 502 judges whether the new energy system meets the preset short circuit ratio constraint according to the short circuit capacity, the station output and the power conversion factor.

[0128] An output limit generating unit 503 is used to generate an output limit of each new energy station according to the station output if the new energy system meets the short circuit ratio constraint condition;

[0129] Specifically, the output limit refers to the maximum power generation that the station can safely operate under the current short-circuit ratio constraint. After determining that the new energy system meets the short-circuit ratio constraint, the output limit generation unit 503 generates the output limit α of the new energy station i according to the station output. i It is expressed as follows:

[0130] α i =P REi +P REj (3)

[0131] Where P REi represents the new energy output of new energy station i, P REj Represents the new energy output of the surrounding station j of the new energy station i.

[0132] A second judgment unit 504 is used to judge whether each of the output limits is less than a preset first threshold;

[0133] Specifically, the first threshold is determined according to the system operation requirements and specifies the standard of the station output limit. The second judgment unit 504 compares the output limit of each station with the first threshold. If the output limits of all stations are greater than or equal to the first threshold, the system meets the operation requirements; otherwise, the system configuration needs to be adjusted.

[0134] The first iterative operation unit 505 is used to increase the capacity of the phase regulator and iteratively execute the above steps until all the output limits are not less than the first threshold if there is an output limit less than the first threshold.

[0135] Specifically, if the first iterative operation unit 505 finds that the output limit of a certain station is less than the first threshold, it means that the current system does not meet the operation requirements. By increasing the capacity of the phase regulator and improving the reactive power support capability, the system short-circuit capacity can be increased, thereby increasing the output limit. After increasing the capacity of the phase regulator, the aforementioned steps are re-executed to re-acquire the short-circuit capacity and station output, and the output limit is recalculated under the condition of satisfying the short-circuit ratio constraint until the output limits of all stations meet the first threshold requirement.

[0136] Figure 6 is a schematic diagram of the structure of a phase regulator capacity configuration device provided in an embodiment of the present application. Figure 5 Based on the embodiment, further, Figure 6 As shown, the phase-shifting capacity configuration device provided in this application also includes:

[0137] The second iterative operation unit 601 is used to increase the capacity of the phase regulator and iteratively perform the following steps until the new energy system meets the short circuit ratio constraint condition if the new energy system does not meet the short circuit ratio constraint condition:

[0138] The second data acquisition unit 602 is used to acquire the short-circuit capacity, station output and power conversion factor after increasing the capacity of the phase regulator;

[0139] The third judgment unit 603 is used to judge whether the new energy system meets the preset short-circuit ratio constraint condition according to the short-circuit capacity after the capacity of the phase regulator is increased, the station output and the power conversion factor.

[0140] Figure 7 is a schematic diagram of the structure of a phase regulator capacity configuration device provided in an embodiment of the present application. Figure 5 Based on the embodiment, further, Figure 7 As shown, the phase-shifting capacity configuration device provided in this application also includes:

[0141] A short circuit ratio generating module 701 is used to generate the short circuit ratio of each new energy station according to the short circuit capacity, the station output and the power conversion factor;

[0142] The short circuit ratio determination module 702 is used to determine whether each of the short circuit ratios is greater than a preset minimum required short circuit ratio;

[0143] The judgment result determination module 703 is used to determine that if there is a short circuit ratio that is not greater than the minimum required short circuit ratio, the new energy system does not meet the short circuit ratio constraint condition; if all the short circuit ratios are greater than the minimum required short circuit ratio, the new energy system meets the short circuit ratio constraint condition.

[0144] Figure 8 is a schematic diagram of the structure of a phase regulator capacity configuration device provided in an embodiment of the present application. Figure 5 Based on the embodiment, further, Figure 8 As shown, the phase-shifting capacity configuration device provided in this application also includes:

[0145] An economic indicator generating unit 801, configured to generate an economic indicator according to the current phase-converting unit capacity when the output limits are not less than the first threshold value;

[0146] The economic indicator judgment unit 802 is used to judge whether the economic indicator is less than a preset second threshold.

[0147] The present application provides a method and device for configuring the capacity of a phase regulator, which obtains the short-circuit capacity, station output and power conversion factor of the new energy system after the phase regulator is installed; determines whether the new energy system meets the preset short-circuit ratio constraint condition according to the short-circuit capacity, the station output and the power conversion factor; if the new energy system meets the short-circuit ratio constraint condition, generates the output limit of each new energy station according to the station output; determines whether each output limit is less than a preset first threshold; if there is an output limit less than the first threshold, increases the capacity of the phase regulator and iterates the above steps until each output limit is not less than the first threshold, thereby optimizing the configuration of the phase regulator in the power system and improving the stability of the power grid and the access capacity of new energy. Among them, by accurately calculating and configuring the capacity of the phase regulator, the short-circuit capacity of the power system is effectively improved; by judging the economic indicators, the stable operation and long-term benefits of the phase regulator are ensured.

[0148] Fig. 9 is a schematic diagram of the physical structure of an electronic device provided in an embodiment of the present application, such as Fig. 9As shown, the electronic device may include: a processor 901, a communication interface 902, a memory 903 and a communication bus 904, wherein the processor 901, the communication interface 902 and the memory 903 communicate with each other through the communication bus 904. The processor 901 may call the logic instructions in the memory 903 to execute the following method: obtaining the short-circuit capacity, station output and power conversion factor of the new energy system after the phase shifter is installed; judging whether the new energy system meets the preset short-circuit ratio constraint condition according to the short-circuit capacity, the station output and the power conversion factor; if the new energy system meets the short-circuit ratio constraint condition, generating the output limit of each new energy station according to the station output; judging whether each output limit is less than a preset first threshold; if there is an output limit less than the first threshold, increasing the capacity of the phase shifter and iteratively executing the above steps until each output limit is not less than the first threshold.

[0149] In addition, the logic instructions in the above-mentioned memory 903 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on such an understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a disk or an optical disk.

[0150] The present embodiment discloses a computer program product, which includes a computer program stored on a computer-readable storage medium, and the computer program includes program instructions. When the program instructions are executed by a computer, the computer can execute the methods provided by the above-mentioned method embodiments, for example, including: obtaining the short-circuit capacity, station output and power conversion factor of the new energy system after the phase regulator is installed; judging whether the new energy system meets the preset short-circuit ratio constraint condition according to the short-circuit capacity, the station output and the power conversion factor; if the new energy system meets the short-circuit ratio constraint condition, generating the output limit of each new energy station according to the station output; judging whether each output limit is less than a preset first threshold; if there is an output limit less than the first threshold, increasing the capacity of the phase regulator and iteratively executing the above steps until each output limit is not less than the first threshold.

[0151] The present embodiment provides a computer-readable storage medium, which stores a computer program, and the computer program enables the computer to execute the methods provided by the above-mentioned method embodiments, for example, including: obtaining the short-circuit capacity, station output and power conversion factor of the new energy system after the phase regulator is installed; judging whether the new energy system meets the preset short-circuit ratio constraint condition according to the short-circuit capacity, the station output and the power conversion factor; if the new energy system meets the short-circuit ratio constraint condition, generating the output limit of each new energy station according to the station output; judging whether each output limit is less than a preset first threshold; if there is an output limit less than the first threshold, increasing the capacity of the phase regulator and iteratively executing the above steps until each output limit is not less than the first threshold.

[0152] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0153] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes 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 generate 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.

[0154] 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 including 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.

[0155] 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.

[0156] In the description of this specification, the description with reference to the terms "one embodiment", "a specific embodiment", "some embodiments", "for example", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0157] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present application. It should be understood that the above description is only a specific embodiment of the present application and is not intended to limit the scope of protection of the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A method for configuring phase condenser capacity, characterized in that: include: Obtain the short-circuit capacity, station output and power conversion factor of the new energy system after installing the phase regulator; Determining whether the new energy system meets a preset short-circuit ratio constraint condition according to the short-circuit capacity, the station output and the power conversion factor; If the new energy system meets the short-circuit ratio constraint condition, the output limit of each new energy station is generated according to the station output; Determining whether each of the output limits is less than a preset first threshold; If there is an output limit less than the first threshold, the capacity of the phase regulator is increased and the above steps are iteratively performed until all the output limits are not less than the first threshold.

2. The method for configuring the phase condenser capacity according to claim 1, characterized in that: Also includes: If the new energy system does not meet the short circuit ratio constraint condition, increase the capacity of the phase regulator and iteratively perform the following steps until the new energy system meets the short circuit ratio constraint condition: Obtaining the short-circuit capacity, station output and power conversion factor after increasing the capacity of the phase regulator; It is determined whether the new energy system meets the preset short-circuit ratio constraint condition according to the short-circuit capacity after increasing the capacity of the phase regulator, the station output and the power conversion factor.

3. The method for configuring the phase condenser capacity according to claim 1, characterized in that: The determining whether the new energy system meets a preset short circuit ratio constraint condition according to the short circuit capacity, the station output and the power conversion factor includes: Generate a short-circuit ratio of each new energy station according to the short-circuit capacity, the station output and the power conversion factor; Determining whether each of the short-circuit ratios is greater than a preset minimum required short-circuit ratio; If there is a short circuit ratio that is not greater than the minimum required short circuit ratio, the new energy system does not meet the short circuit ratio constraint condition; if all the short circuit ratios are greater than the minimum required short circuit ratio, the new energy system meets the short circuit ratio constraint condition.

4. The method for configuring the phase condenser capacity according to claim 1, characterized in that: Also includes: When the output limits are not less than the first threshold, generating an economic indicator according to the current capacity of the phase regulator; It is determined whether the economic indicator is less than a preset second threshold.

5. A phase-shifting machine capacity configuration device, characterized in that: include: The first data acquisition unit is used to obtain the short-circuit capacity, station output and power conversion factor of the new energy system after the phase regulator is installed; A first judgment unit, configured to judge whether the new energy system meets a preset short circuit ratio constraint condition according to the short circuit capacity, the station output and the power conversion factor; An output limit generating unit, configured to generate an output limit of each new energy station according to the station output if the new energy system satisfies the short circuit ratio constraint condition; A second judgment unit, used to judge whether each of the output limits is less than a preset first threshold; The first iterative operation unit is used to increase the capacity of the phase regulator and iteratively execute the above steps until all the output limits are not less than the first threshold if there is an output limit less than the first threshold.

6. The phase condenser capacity configuration device according to claim 5, characterized in that: Also includes: The second iterative operation unit is used to increase the capacity of the phase modulator and iteratively perform the following steps until the new energy system meets the short circuit ratio constraint condition if the new energy system does not meet the short circuit ratio constraint condition: A second data acquisition unit is used to acquire the short-circuit capacity, station output and power conversion factor after increasing the capacity of the phase regulator; The third judgment unit is used to judge whether the new energy system meets the preset short-circuit ratio constraint condition according to the short-circuit capacity after the capacity of the phase regulator is increased, the station output and the power conversion factor.

7. The phase modulator capacity configuration device according to claim 5, characterized in that: The first judging unit comprises: A short circuit ratio generation module, used to generate the short circuit ratio of each new energy station according to the short circuit capacity, the station output and the power conversion factor; A short circuit ratio judgment module, used to judge whether each of the short circuit ratios is greater than a preset minimum required short circuit ratio; The judgment result determination module is used to determine that if there is a short-circuit ratio that is not greater than the minimum required short-circuit ratio, the new energy system does not meet the short-circuit ratio constraint condition; if all the short-circuit ratios are greater than the minimum required short-circuit ratio, the new energy system meets the short-circuit ratio constraint condition.

8. The phase modulator capacity configuration device according to claim 5, characterized in that: Also includes: An economic indicator generating unit, configured to generate an economic indicator according to the current capacity of the phase regulator when the output limits are not less than the first threshold value; The economic indicator judgment unit is used to judge whether the economic indicator is less than a preset second threshold.

9. A computer 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 computer program, the method according to any one of claims 1 to 4 is implemented.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 4 is implemented.

11. A computer program product, characterized in that The computer program product comprises a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 4 is implemented.

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