A new energy base distributed phase modifier configuration method based on adaptive compensation

Abstract

The application discloses a new energy base distributed phase modifier configuration method and system based on adaptive compensation, comprising: building simulation data of a target new energy base; performing simulation calculation to obtain short-circuit ratio levels of each new energy station; calculating short-circuit ratio demand indexes of each new energy station according to the current short-circuit ratio levels; calculating influence factors between the new energy stations, calculating multi-station short-circuit ratio demand indexes based on the influence factors and the short-circuit ratio demand indexes; arranging the multi-station short-circuit ratio demand indexes in descending order, and respectively configuring one distributed phase modifier for the new energy stations corresponding to the first N multi-station short-circuit ratio demand indexes; after the configuration is completed, re-performing simulation calculation, and re-calculating the short-circuit ratio levels of each new energy station; if the current short-circuit ratio levels of each new energy station meet preset specification requirements, determining a distributed phase modifier configuration scheme according to the positions and quantities of the current distributed phase modifiers.

Description

Technical Field

[0001] This invention relates to the field of new energy power generation planning technology, and more specifically, to a method and system for configuring distributed synchronous condensers in new energy bases based on adaptive compensation. Background Technology

[0002] Large-scale new energy bases in deserts, Gobi, and desertified regions are a core component of my country's new energy development strategy, and these bases are expected to continue their rapid development. However, these bases are typically located in remote areas, at the end of the power grid, and lack supporting power sources such as thermal power in the vicinity. Furthermore, the large scale and high proportion of new energy sources, coupled with the fact that most existing new energy power generation equipment uses grid-connected technology with insufficient voltage support, lead to a series of problems such as low short-circuit ratios and overvoltages, hindering the large-scale development and high-proportion consumption of new energy.

[0003] Based on current engineering experience, the short-circuit ratio and overvoltage problems on the new energy side of the Shagohuang New Energy Base are often more serious than those on the DC converter station of its external transmission channel. Furthermore, the large-capacity synchronous condensers centrally configured on the DC converter station have limited effect on improving the voltage problem on the new energy side. Directly configuring distributed synchronous condensers on the new energy side is a more effective way to solve the above problems.

[0004] The new distributed synchronous condenser can flexibly enhance the short-circuit capacity and dynamic reactive power support capability of renewable energy power plants on-site, playing a significant role in preventing grid disconnection of renewable energy power generation equipment such as wind power and photovoltaics, and improving voltage stability in the areas where renewable energy power plants converge. Furthermore, the new distributed synchronous condenser is designed with full consideration of the reactive power demand characteristics of renewable energy sources, exhibiting superior transient dynamic performance, greater phase advance capability, and lower operating losses.

[0005] Compared to large synchronous condensers, distributed synchronous condensers have advantages such as high integration, system stability, short construction period, low cost per unit capacity, and good regulation performance. They also have better transient, subtransient, and steady-state performance, which can significantly improve the transmission capacity of new energy. After distributed synchronous condensers are connected to new energy power stations, the equivalent impedance of the power station decreases, and the short-circuit current and short-circuit capacity increase, thereby improving the voltage support strength.

[0006] However, existing distributed synchronous condenser configuration methods either only consider the short-circuit ratio or transient overvoltage at the new energy generator end, resulting in insufficient optimization of the configuration and inadequate short-circuit ratio compensation; or they configure one synchronous condenser at the node with the lowest short-circuit ratio in each step (referred to as the lowest short-circuit ratio method, single-node single-unit configuration in a single step), or configure one or more synchronous condensers at the node with the highest short-circuit ratio requirement in each step (referred to as the single-point method, single-node single-unit or multiple-unit configuration in a single step). Both of these methods require repeated calculation of the short-circuit ratio and related variables of all nodes, resulting in a large computational workload and a high risk of undercompensation or overcompensation. The main reasons are: (1) The node with the lowest short-circuit ratio may not be the node that needs the most compensation. Configuring a synchronous condenser at this node may not achieve the best overall effect, and undercompensation may easily occur during the configuration process; (2) Each time, the short-circuit ratio target value of a single node is configured. Due to the mutual influence between nodes, some nodes have been overcompensated after multiple rounds of configuration; (3) New energy bases usually require multiple nodes to be configured with synchronous condensers in a decentralized manner. Each time, one or more synchronous condensers are configured at a single node, and multiple rounds (more than 10 times) of repeated calculation are required.

[0007] Therefore, existing methods generally do not provide optimized configuration results, and the configuration process is not convenient and has a high degree of repetition.

[0008] Therefore, a method and system for configuring distributed synchronous condensers in new energy bases based on adaptive compensation is needed. Summary of the Invention

[0009] This invention proposes a method and system for configuring distributed synchronous condensers in new energy bases based on adaptive compensation, in order to solve the problem of how to efficiently configure distributed synchronous condensers in new energy bases.

[0010] To address the aforementioned problems, according to one aspect of the present invention, a method for configuring distributed synchronous condensers in new energy bases based on adaptive compensation is provided, the method comprising: Simulation data for the target new energy base was built based on power system simulation software; Based on the simulation data, simulation calculations are performed under the new energy power generation operation mode to obtain the short-circuit ratio level of each new energy station in the target new energy base; Based on the current short-circuit ratio level, calculate the short-circuit ratio demand index for each new energy power station; Calculate the influencing factors among various new energy power stations, and based on the influencing factors and the short-circuit ratio demand index, calculate the multi-station short-circuit ratio demand index for each new energy power station; The short-circuit ratio demand index of multiple power stations is sorted in descending order, and one distributed synchronous condenser is configured for each of the N new energy power stations corresponding to the top N short-circuit ratio demand indexes; where N is the number of new energy power stations configured with synchronous condensers. After configuration, simulation calculations were performed again under the new energy power plant operation mode to recalculate the short-circuit ratio level of each new energy power plant. If the current short-circuit ratio of each new energy power station meets the preset specification requirements, then the configuration scheme of distributed synchronous condensers will be determined based on the current location and number of distributed synchronous condensers.

[0011] Preferably, the method determines the short-circuit ratio demand index for each new energy power station using the following methods: , in, To increase the target value for the short-circuit ratio; Let represent the current short-circuit ratio level of the i-th renewable energy power station.

[0012] Preferably, the method further includes: The target value for improving the short-circuit ratio is set as follows: 1.5 for the low-voltage side of the booster transformer in the new energy power generation unit and 2.0 for the new energy grid connection point.

[0013] Preferably, the method determines the influencing factors among various new energy power stations using the following methods: , in, The influence factor between the i-th and j-th new energy power stations; and Let represent the mutual impedance between the i-th and j-th renewable energy power stations and the self-impedance of the i-th renewable energy power station, respectively.

[0014] Preferably, the calculation of the multi-site short-circuit ratio demand index for each new energy power station based on the influencing factors and the short-circuit ratio demand index includes: , in, For the i-th renewable energy power station, the multi-station short-circuit ratio demand index is used. The influence factor between the i-th and j-th new energy power stations; To aggregate new energy capacity for the j-th new energy power station; The amount of new energy gathered for the i-th new energy power station; n is the number of new energy power stations.

[0015] Preferably, the method further includes: N can be set to a fixed value according to a preset quantity, or N can be adaptively set according to the degree of change of the short-circuit ratio demand index of multiple stations.

[0016] Preferably, the method further includes: If the current short-circuit ratio level of each new energy power station does not meet the preset specification requirements, then return to the step of calculating the short-circuit ratio demand index of each new energy power station based on the current short-circuit ratio level and recalculate until the short-circuit ratio level of each new energy power station meets the preset specification requirements. Then, determine the distributed synchronous condenser configuration scheme based on the current location and number of distributed synchronous condensers.

[0017] According to another aspect of the present invention, a distributed synchronous condenser configuration system for a new energy base based on adaptive compensation is provided, the system comprising: The simulation building unit is used to build simulation data for the target new energy base based on power system simulation software; The first simulation calculation unit is used to perform simulation calculations based on the simulation data under the new energy power generation operation mode, so as to obtain the short-circuit ratio level of each new energy station in the target new energy base; The short-circuit ratio demand calculation unit calculates the short-circuit ratio demand index for each new energy power station based on the current short-circuit ratio level. The multi-site short-circuit ratio demand calculation unit is used to calculate the short-circuit ratio demand index of each new energy power station based on the current short-circuit ratio level. The configuration unit is used to sort the short-circuit ratio demand index of multiple power stations in descending order, and configure one distributed synchronous condenser for each of the N new energy power stations corresponding to the short-circuit ratio demand index of the first N power stations; where N is the number of new energy power stations configured with synchronous condensers. The second simulation calculation unit is used to re-perform simulation calculations under the new energy power plant operation mode after configuration, and to recalculate the short-circuit ratio level of each new energy power plant. The configuration scheme determination unit is used to determine the distributed synchronous condenser configuration scheme based on the current location and number of distributed synchronous condensers if the current short-circuit ratio level of each new energy power station meets the preset specification requirements.

[0018] Preferably, the first simulation calculation unit and the second simulation calculation unit determine the short-circuit ratio demand index of each new energy power station in the following manner: , in, To increase the target value for the short-circuit ratio; Let represent the current short-circuit ratio level of the i-th renewable energy power station.

[0019] Preferably, the first simulation unit and the second simulation unit are further configured to: The target value for improving the short-circuit ratio is set as follows: 1.5 for the low-voltage side of the booster transformer in the new energy power generation unit and 2.0 for the new energy grid connection point.

[0020] Preferably, the first simulation calculation unit and the second simulation calculation unit determine the influence factors between each new energy power station in the following manner: , in, The influence factor between the i-th and j-th new energy power stations; and Let represent the mutual impedance between the i-th and j-th renewable energy power stations and the self-impedance of the i-th renewable energy power station, respectively.

[0021] Preferably, the multi-site short-circuit ratio demand calculation unit calculates the multi-site short-circuit ratio demand index for each new energy power station based on the influencing factors and the short-circuit ratio demand index, including: , in, For the i-th renewable energy power station, the multi-station short-circuit ratio demand index is used. The influence factor between the i-th and j-th new energy power stations; To aggregate new energy capacity for the j-th new energy power station; The amount of new energy gathered for the i-th new energy power station; n is the number of new energy power stations.

[0022] Preferably, the configuration unit is further configured to: N can be set to a fixed value according to a preset quantity, or N can be adaptively set according to the degree of change of the short-circuit ratio demand index of multiple stations.

[0023] Preferably, the configuration scheme determining unit is further configured to: If the current short-circuit ratio level of each new energy power station does not meet the preset specification requirements, then return to the step of calculating the short-circuit ratio demand index of each new energy power station based on the current short-circuit ratio level and recalculate until the short-circuit ratio level of each new energy power station meets the preset specification requirements. Then, determine the distributed synchronous condenser configuration scheme based on the current location and number of distributed synchronous condensers.

[0024] According to another aspect of the present invention, the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements any of the steps in a method for configuring distributed synchronous condensers in a new energy base based on adaptive compensation.

[0025] According to another aspect of the present invention, the present invention provides an electronic device, comprising: The aforementioned computer-readable storage medium; and One or more processors for executing a program in the computer-readable storage medium.

[0026] This invention provides a method and system for configuring distributed synchronous condensers (SCDs) in a renewable energy base based on adaptive compensation. The method includes: building simulation data of the target renewable energy base using power system simulation software; performing simulation calculations under a renewable energy power generation operation mode based on the simulation data to obtain the short-circuit ratio level of each renewable energy power station in the target renewable energy base; calculating the short-circuit ratio demand index of each renewable energy power station based on the current short-circuit ratio level; calculating the influence factors between each renewable energy power station, and calculating the short-circuit ratio demand index of multiple power stations based on the influence factors and the short-circuit ratio demand index; arranging the short-circuit ratio demand indices of multiple power stations in descending order, and configuring one distributed synchronous condenser for each of the N renewable energy power stations corresponding to the top N multi-power station short-circuit ratio demand indices; where N is the number of renewable energy power stations with configured synchronous condensers; after configuration, re-performing the simulation calculations under a renewable energy power generation operation mode to recalculate the short-circuit ratio level of each renewable energy power station; if the current short-circuit ratio level of each renewable energy power station meets the preset specification requirements, then determining the distributed synchronous condenser configuration scheme based on the current location and number of distributed synchronous condensers. The method of this invention is based on the short-circuit ratio demand index of multiple power stations. It comprehensively considers constraints such as the aggregation scale of renewable energy power stations, the short-circuit ratio of renewable energy, and influencing factors. In each step, it selects several renewable energy power stations with high short-circuit ratio demand indices to configure distributed synchronous condensers (SCMs), and calculates the new short-circuit ratio after configuration, until the short-circuit ratio of all renewable energy power stations meets the standard. This method can configure distributed SCMs at a single point or multiple points in a single operation, thereby achieving the goal of quickly determining the configuration scheme. Attached Figure Description

[0027] Exemplary embodiments of the present invention can be more fully understood by referring to the following figures: Figure 1 A flowchart of a distributed synchronous condenser configuration method 100 for a new energy base based on adaptive compensation according to an embodiment of the present invention; Figure 2 This is a flowchart illustrating the overall process of a distributed synchronous condenser configuration method for new energy bases based on adaptive compensation, according to an embodiment of the present invention. Figure 3 This is a power flow result diagram under the new energy large-scale operation mode according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of a distributed synchronous condenser configuration system 400 for a new energy base based on adaptive compensation, according to an embodiment of the present invention. Detailed Implementation

[0028] Exemplary embodiments of the invention will now be described with reference to the accompanying drawings. However, the invention may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided to fully and completely disclose the invention and to fully convey its scope to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the drawings is not intended to limit the invention. In the drawings, the same units / elements are referred to by the same reference numerals.

[0029] Unless otherwise stated, the terms used herein (including technical terms) have their common meaning as understood by one of ordinary skill in the art. Furthermore, it is understood that terms defined in commonly used dictionaries should be understood to have a meaning consistent with the context of their relevant field, and not to be interpreted as having an idealized or overly formal meaning.

[0030] Figure 1 This is a flowchart of a distributed synchronous condenser configuration method 100 for a new energy base based on adaptive compensation, according to an embodiment of the present invention. Figure 1 As shown, the adaptive compensation-based distributed synchronous condenser configuration method for renewable energy bases provided by this invention, based on the short-circuit ratio demand index of multiple power stations, comprehensively considers various constraints such as the aggregation scale of renewable energy power stations, the short-circuit ratio of renewable energy, and influencing factors. In each step, it selects N renewable energy power stations with higher short-circuit ratio demand indices to configure distributed synchronous condensers, and calculates the new short-circuit ratio after configuration, until the short-circuit ratio of all renewable energy power stations meets the standard. This method can configure distributed synchronous condensers in a single step or at multiple points, thereby achieving the goal of quickly determining the configuration scheme. The adaptive compensation-based distributed synchronous condenser configuration method 100 for renewable energy bases provided by this invention starts from step 101. In step 101, simulation data of the target renewable energy base is built based on power system simulation software.

[0031] In step 102, simulation calculations are performed based on the simulation data under the new energy power generation operation mode to obtain the short-circuit ratio level of each new energy station in the target new energy base.

[0032] Combination Figure 2 As shown, in this invention, simulation data for the Shagohuang renewable energy base, transmission channels, and main grid are built based on the PSD-BPA power system simulation software. Considering severe conditions, the operation mode of renewable energy generation in the base and surrounding areas is arranged as follows: thermal power plants operate at minimum technical output with low startup, and energy storage is in charging state. Flow, stability, and short-circuit ratio calculations are performed to obtain the short-circuit ratio levels of each renewable energy station in the base.

[0033] In step 103, the short-circuit ratio demand index of each new energy power station is calculated based on the current short-circuit ratio level.

[0034] Preferably, the method determines the short-circuit ratio requirement for each new energy power station in the following manner: , in, Let be the short-circuit ratio demand index for the i-th renewable energy power station; To increase the target value for the short-circuit ratio; Let be the current short-circuit ratio of the i-th renewable energy power station.

[0035] Preferably, the method further includes: The target value for improving the short-circuit ratio is set as follows: 1.5 for the low-voltage side of the booster transformer in the new energy power generation unit and 2.0 for the new energy grid connection point.

[0036] In this invention, the short-circuit ratio demand index of the i-th renewable energy power station The larger the value, the farther away from the target value, and the more urgent the need to configure distributed synchronous condensers. The calculation formula is as follows: , in, To increase the target value for the short-circuit ratio; Let represent the current short-circuit ratio level of the i-th renewable energy power station.

[0037] For the target value of improving the short-circuit ratio, the low-voltage side of the boost transformer for the new energy power generation unit is set at 1.5, and the grid connection point for new energy is set at 2.0, in accordance with the standard requirements.

[0038] In step 104, the influence factors between each new energy power station are calculated. Based on the influence factors and the short-circuit ratio demand index, the multi-station short-circuit ratio demand index of each new energy power station is calculated.

[0039] Preferably, the method determines the influencing factors among various new energy power stations using the following methods: , in, The influencing factor between the i-th and j-th new energy power stations; and Let represent the mutual impedance between the i-th and j-th renewable energy power stations and the self-impedance of the i-th renewable energy power station, respectively.

[0040] Preferably, the calculation of the multi-site short-circuit ratio demand index for each new energy power station based on the influencing factors and the short-circuit ratio demand index includes: , in, For the i-th renewable energy power station, the multi-station short-circuit ratio demand index is used. The influencing factor between the i-th and j-th new energy power stations; To aggregate new energy capacity for the j-th new energy power station; The amount of new energy gathered for the i-th new energy power station; n is the number of new energy power stations.

[0041] In this invention, the scale of new energy gathered by each new energy power station, the current short-circuit ratio level, and the influencing factors between power stations are statistically analyzed, and the short-circuit ratio demand index of each new energy power station is calculated based on the current short-circuit ratio level.

[0042] Specifically, the scale and influencing factors of each new energy power station are combined, multiplied by its current short-circuit ratio demand, and then attributed to the target new energy power station to calculate the multi-station short-circuit ratio demand index of the target new energy power station. The calculation formula is as follows: , in, To aggregate new energy capacity for the j-th new energy power station; To aggregate the scale of new energy for the i-th new energy power station.

[0043] In step 105, the short-circuit ratio demand indexes of multiple power stations are sorted in descending order, and one distributed synchronous condenser is configured for each of the N new energy power stations corresponding to the top N short-circuit ratio demand indexes; where N is the number of new energy power stations configured with synchronous condensers.

[0044] Preferably, the method further includes: N can be set to a fixed value according to a preset quantity, or N can be adaptively set according to the degree of change of the short-circuit ratio demand index of multiple stations.

[0045] Combination Figure 2 As shown, in this invention, the short-circuit ratio demand index of each new energy power station is sorted in descending order, and the N new energy power stations with the highest short-circuit ratio demand index are selected for configuration, and one distributed synchronous condenser is configured.

[0046] Specifically, after sorting the short-circuit ratio demand index of each new energy power station from largest to smallest, N stations with significantly higher demand ratios than the others are selected, and each is configured with one distributed synchronous condenser. The number of distributed synchronous condensers configured in each step varies, generally showing an adaptive pattern of more in the initial steps, fewer in the later steps, and finally fine-tuning of individual units. This configuration method can significantly reduce the configuration process and improve configuration efficiency.

[0047] When determining the target new energy power station, the new energy power station corresponding to the largest multi-station short-circuit ratio demand index can be selected as the target new energy power station.

[0048] In step 106, after the configuration is completed, simulation calculations are performed again under the new energy power plant operation mode to recalculate the short-circuit ratio level of each new energy power plant.

[0049] In step 107, if the current short-circuit ratio of each new energy power station meets the preset specification requirements, the distributed synchronous condenser configuration scheme is determined based on the current location and number of distributed synchronous condensers.

[0050] Preferably, the method further includes: If the current short-circuit ratio level of each new energy power station does not meet the preset specification requirements, then return to the step of calculating the short-circuit ratio demand index of each new energy power station based on the current short-circuit ratio level and recalculate until the short-circuit ratio level of each new energy power station meets the preset specification requirements. Then, determine the distributed synchronous condenser configuration scheme based on the current location and number of distributed synchronous condensers.

[0051] In this invention, the standard used is the "Power System Safety and Stability Calculation Standard" (GB / T40581-2021), which requires that the multi-station short-circuit ratio (MRSCR) on the low-voltage side of the step-up transformer of the new energy power generation unit be not less than 1.5, and the MRSCR at the new energy grid connection point be not less than 2.0.

[0052] Combination Figure 2 As shown, in this invention, after configuration, power flow and short-circuit ratio are recalculated under the new energy power generation operation mode, and the short-circuit ratio level of each new energy power station and the influencing factors between power stations are statistically analyzed. Then, it is determined whether the short-circuit ratio level of each new energy power station meets the standard. If all meet the standard, the calculation stops, and the location and quantity of all distributed synchronous condensers are summarized as the final distributed synchronous condenser configuration scheme; otherwise, the process returns to step 103 to recalculate until the current short-circuit ratio level of each new energy power station meets the preset specification requirements. Finally, the distributed synchronous condenser configuration scheme is determined based on the current location and quantity of the distributed synchronous condensers.

[0053] This invention proposes a method and system for configuring distributed synchronous condensers (SCPs) in large-scale renewable energy bases based on adaptive compensation. The system configures SCPs based on a proposed multi-site short-circuit ratio demand index. This index comprehensively considers multiple constraints, including the scale of renewable energy base aggregation, the renewable energy short-circuit ratio, and influencing factors, respectively characterizing the impact of renewable energy scale, the current short-circuit ratio demand, and the degree of impact of configuring SCPs on each base. Specifically, based on the multi-site short-circuit ratio demand index, and comprehensively considering constraints such as the scale of renewable energy base aggregation, the system determines the renewable energy bases to be configured and configures SCPs at each step. After configuration, the new short-circuit ratio level and influencing factors are calculated until the short-circuit ratio of all renewable energy bases meets the standard. This method can configure SCPs at single or multiple points according to demand in a single operation, significantly improving the configuration speed and achieving the goal of quickly completing the configuration plan. This invention can optimize the number of SCPs, improve the renewable energy absorption level, and enhance project economics, showing very broad application prospects.

[0054] The following specific examples illustrate the embodiments of the present invention. In an embodiment of the present invention, taking a new energy base project in Northwest China as an example, the base has a total new energy capacity of 10 million kW, including 7 million kW of wind power and 3 million kW of photovoltaic power; it is supported by 4 × 1 million kW of coal-fired power; and it has 2 million kW × 4h of electrochemical energy storage. The base relies on the ±800kV ultra-high voltage direct current (UHVDC) project to transmit electricity, with a transmission capacity of 8 million kW and an annual transmission volume of approximately 36 billion kWh. The new energy is connected to the UHVDC converter station after a three-stage step-up of 35kV / 220kV / 750kV. A total of 14 220kV new energy step-up substations have been built, each of which gathers 5 to 9 million kW of wind and photovoltaic power generation, and is equipped with a dynamic reactive power compensation device of 120 to 200 Mvar. The supporting energy storage is evenly distributed in each new energy station.

[0055] Arranging the operation mode of new energy power plants, the trend is like Figure 3 As shown in Table 1 below, if the base is not equipped with distributed synchronous condensers, the transient overvoltage and short-circuit ratio of new energy sources will not meet the technical requirements. Under the condition of three consecutive commutation failures and blockade faults in DC, the transient overvoltage of new energy sources will reach 1.382 pu. The minimum short-circuit ratio of each new energy power station at the generator terminal is less than 1.5 and at the grid connection point is less than 2.0.

[0056] Table 1 Parameter Table for New Energy Power Stations

[0057] (1) Distributed synchronous condenser configuration scheme of the present invention The distributed synchronous condenser configuration scheme was calculated using the method proposed in this paper, as shown in Table 2. The results show that the configuration scheme can be determined in only 4 rounds, and the base as a whole needs to be configured with 22 distributed synchronous condensers (50 Mvar each).

[0058] (2) Existing Distributed Synchronous Condenser Configuration Scheme If the lowest short-circuit ratio method is used, one distributed synchronous condenser is configured at the node with the lowest short-circuit ratio each time, requiring 23 rounds and configuring a total of 23 synchronous condensers. If the single-point method is used, one or more synchronous condensers are configured at the node with the lowest short-circuit ratio requirement each time, requiring 11 rounds and configuring a total of 23 synchronous condensers. As shown in Table 3.

[0059] Table 3 Existing methods for calculating distributed synchronous condenser configuration schemes

[0060] (3) Comparison of configuration methods and their effects The configuration scheme comparison results are shown in Table 4. The method of the present invention is superior in terms of total scale, with smaller variance and higher balance. In particular, it is the fastest, requiring only 4 rounds to complete the configuration.

[0061] Table 6 Comparison of Configuration Methods

[0062] Figure 4 This is a schematic diagram of the structure of a distributed synchronous condenser configuration system 400 for a new energy base based on adaptive compensation, according to an embodiment of the present invention. Figure 4 As shown, the distributed synchronous condenser configuration system 400 for new energy bases based on adaptive compensation provided in this embodiment of the invention includes: a simulation building unit 401, a first simulation calculation unit 402, a short-circuit ratio demand calculation unit 403, a multi-site short-circuit ratio demand calculation unit 404, a configuration unit 405, a second simulation calculation unit 406, and a configuration scheme determination unit 407.

[0063] Preferably, the simulation building unit 401 is used to build simulation data of the target new energy base based on power system simulation software.

[0064] Preferably, the first simulation calculation unit 402 is used to perform simulation calculations based on the simulation data under the new energy power generation operation mode, so as to obtain the short-circuit ratio level of each new energy station in the target new energy base.

[0065] Preferably, the short-circuit ratio demand calculation unit 403 calculates the short-circuit ratio demand index of each new energy power station based on the current short-circuit ratio level.

[0066] Preferably, the short-circuit ratio demand calculation unit 403 determines the short-circuit ratio demand index for each new energy power station using the following method: , in, To increase the target value for the short-circuit ratio; Let represent the current short-circuit ratio level of the i-th renewable energy power station.

[0067] Preferably, the short-circuit ratio demand calculation unit 403 is further used for: The target value for improving the short-circuit ratio is set as follows: 1.5 for the low-voltage side of the booster transformer in the new energy power generation unit and 2.0 for the new energy grid connection point.

[0068] Preferably, the multi-site short-circuit ratio demand calculation unit 404 is used to calculate the influence factors between each new energy power station, and to calculate the multi-site short-circuit ratio demand index of each new energy power station based on the influence factors and the short-circuit ratio demand index.

[0069] Preferably, the multi-station short-circuit ratio demand calculation unit 404 determines the influencing factors among various new energy power stations using the following methods: , in, The influencing factor between the i-th and j-th new energy power stations; and Let represent the mutual impedance between the i-th and j-th renewable energy power stations and the self-impedance of the i-th renewable energy power station, respectively.

[0070] Preferably, the multi-site short-circuit ratio demand calculation unit 404 calculates the multi-site short-circuit ratio demand index for each new energy power station based on the influencing factors and the short-circuit ratio demand index, including: , in, For the i-th renewable energy power station, the multi-station short-circuit ratio demand index is used. The influencing factor between the i-th and j-th new energy power stations; To aggregate new energy capacity for the j-th new energy power station; The amount of new energy gathered for the i-th new energy power station; n is the number of new energy power stations.

[0071] Preferably, the configuration unit 405 is used to sort the short-circuit ratio demand index of multiple power stations in descending order, and configure one distributed synchronous condenser for each of the N new energy power stations corresponding to the first N short-circuit ratio demand index of multiple power stations; wherein, N is the number of new energy power stations configured with synchronous condensers.

[0072] Preferably, the configuration unit 405 is further configured to: N can be set to a fixed value according to a preset quantity, or N can be adaptively set according to the degree of change of the short-circuit ratio demand index of multiple stations.

[0073] Preferably, the second simulation calculation unit 406 is used to re-perform simulation calculations under the new energy power plant operation mode after configuration, and recalculate the short-circuit ratio requirements of each new energy power plant.

[0074] Preferably, the configuration scheme determination unit 407 is used to determine the distributed synchronous condenser configuration scheme based on the current location and number of distributed synchronous condensers if the current short-circuit ratio requirement of each new energy power station meets the preset requirement.

[0075] Preferably, the configuration scheme determination unit 407 is further configured to: If the current short-circuit ratio level of each new energy power station does not meet the preset specification requirements, then return to the step of calculating the short-circuit ratio demand index of each new energy power station based on the current short-circuit ratio level and recalculate until the short-circuit ratio level of each new energy power station meets the preset specification requirements. Then, determine the distributed synchronous condenser configuration scheme based on the current location and number of distributed synchronous condensers.

[0076] The adaptive compensation-based distributed synchronous condenser configuration system 400 for new energy bases in this embodiment corresponds to the adaptive compensation-based distributed synchronous condenser configuration method 100 for new energy bases in another embodiment of this invention, and will not be described again here.

[0077] According to another aspect of the present invention, the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements any of the steps in a method for configuring distributed synchronous condensers in a new energy base based on adaptive compensation.

[0078] According to another aspect of the present invention, the present invention provides an electronic device, comprising: The aforementioned computer-readable storage medium; and One or more processors for executing a program in the computer-readable storage medium.

[0079] The present invention has been described with reference to a few embodiments. However, it will be apparent to those skilled in the art that other embodiments besides those disclosed above fall equivalently within the scope of the present invention.

[0080] Generally, all terms used in this invention are interpreted according to their ordinary meaning in the art, unless otherwise expressly defined herein. All references to “a / the / the [device, component, etc.]” ​​are openly interpreted as at least one instance of said device, component, etc., unless otherwise expressly stated. The steps of any method disclosed herein need not be performed in the exact order disclosed, unless explicitly stated otherwise.

[0081] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied 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.

[0082] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0083] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0084] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the protection scope of the present invention.

Claims

1. A method for configuring distributed synchronous condensers in a new energy base based on adaptive compensation, characterized in that, The method includes: Simulation data for the target new energy base was built based on power system simulation software; Based on the simulation data, simulation calculations are performed under the new energy power generation operation mode to obtain the short-circuit ratio level of each new energy station in the target new energy base; Based on the current short-circuit ratio level, calculate the short-circuit ratio demand index for each new energy power station; Calculate the influencing factors among various new energy power stations, and based on the influencing factors and the short-circuit ratio demand index, calculate the multi-station short-circuit ratio demand index for each new energy power station; The short-circuit ratio demand index of multiple power stations is sorted in descending order, and one distributed synchronous condenser is configured for each of the N new energy power stations corresponding to the top N short-circuit ratio demand indexes; where N is the number of new energy power stations configured with synchronous condensers. After configuration, simulation calculations were performed again under the new energy power plant operation mode to recalculate the short-circuit ratio level of each new energy power plant. If the current short-circuit ratio of each new energy power station meets the preset specification requirements, then the configuration scheme of distributed synchronous condensers will be determined based on the current location and number of distributed synchronous condensers.

2. The method according to claim 1, characterized in that, The method determines the short-circuit ratio demand index for each new energy power station using the following methods: ， in, The short-circuit ratio demand index of the i-th new energy power station; To increase the target value for the short-circuit ratio; Let represent the current short-circuit ratio level of the i-th renewable energy power station.

3. The method according to claim 2, characterized in that, The method further includes: The target value for improving the short-circuit ratio is set as follows: 1.5 for the low-voltage side of the booster transformer in the new energy power generation unit and 2.0 for the new energy grid connection point.

4. The method according to claim 1, characterized in that, The method determines the influencing factors among various new energy power stations using the following methods: ， in, The influence factor between the i-th and j-th new energy power stations; and Let represent the mutual impedance between the i-th and j-th renewable energy power stations and the self-impedance of the i-th renewable energy power station, respectively.

5. The method according to claim 1, characterized in that, Based on the aforementioned influencing factors and short-circuit ratio demand index, the multi-site short-circuit ratio demand index for each new energy power station is calculated, including: ， in, For the i-th renewable energy power station, the multi-station short-circuit ratio demand index is used. Let be the short-circuit ratio demand index for the i-th renewable energy power station; The influence factor between the i-th and j-th new energy power stations; To aggregate new energy capacity for the j-th new energy power station; The amount of new energy gathered for the i-th new energy power station; n is the number of new energy power stations.

6. The method according to claim 1, characterized in that, The method further includes: N can be set to a fixed value according to a preset quantity, or N can be adaptively set according to the degree of change of the short-circuit ratio demand index of multiple stations.

7. The method according to claim 1, characterized in that, The method further includes: If the current short-circuit ratio level of each new energy power station does not meet the preset specification requirements, then return to the step of calculating the short-circuit ratio demand index of each new energy power station based on the current short-circuit ratio level and recalculate until the short-circuit ratio level of each new energy power station meets the preset specification requirements. Then, determine the distributed synchronous condenser configuration scheme based on the current location and number of distributed synchronous condensers.

8. A distributed synchronous condenser configuration system for a new energy base based on adaptive compensation, characterized in that, The system includes: The simulation building unit is used to build simulation data for the target new energy base based on power system simulation software; The first simulation calculation unit is used to perform simulation calculations based on the simulation data under the new energy power generation operation mode, so as to obtain the short-circuit ratio level of each new energy station in the target new energy base; The short-circuit ratio demand calculation unit calculates the short-circuit ratio demand index for each new energy power station based on the current short-circuit ratio level. The multi-site short-circuit ratio demand calculation unit is used to calculate the influence factors between each new energy power station, and to calculate the multi-site short-circuit ratio demand index of each new energy power station based on the influence factors and the short-circuit ratio demand index. The configuration unit is used to sort the short-circuit ratio demand index of multiple power stations in descending order, and configure one distributed synchronous condenser for each of the N new energy power stations corresponding to the short-circuit ratio demand index of the first N power stations; where N is the number of new energy power stations configured with synchronous condensers. The second simulation calculation unit is used to re-perform simulation calculations under the new energy power plant operation mode after configuration, and to recalculate the short-circuit ratio level of each new energy power plant. The configuration scheme determination unit is used to determine the distributed synchronous condenser configuration scheme based on the current location and number of distributed synchronous condensers if the current short-circuit ratio level of each new energy power station meets the preset specification requirements.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the steps of the method as described in any one of claims 1-7.

10. An electronic device, characterized in that, include: The computer-readable storage medium as described in claim 9; as well as One or more processors for executing a program in the computer-readable storage medium.

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