Power transmission line voltage control method and system considering new energy access

Abstract

The invention provides a voltage control method and system for a power transmission line considering new energy access, and belongs to the technical field of power systems, and the method specifically comprises the steps: obtaining the similar condition of the abnormal fluctuation trend of the historical power generation amount of different concerned access nodes in a time period, and determining the power generation amount of the power transmission line when the fluctuation influence condition meets the requirement based on the similar condition; the processing method for voltage control of the power transmission line is determined on the basis of a power transmission amount interval where the power transmission amount in the power transmission line is located according to similar conditions of abnormal fluctuation trends of the power generation amounts of different first-class access nodes and by combining similar conditions of abnormal fluctuation trends of the power generation amounts of second-class access nodes and the first-class access nodes. And the reliability degree of voltage control is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of power systems, and particularly relates to a voltage control method and system for a transmission line considering the access of new energy. Background Art

[0002] The output of the new energy system has a certain randomness, so that the voltage of the transmission line may fluctuate to a certain extent, making it difficult to meet the requirements of the operation stability of the transmission line.

[0003] Specifically, to solve the above technical solution, in the existing technical solutions, the input control processing of the voltage control device is often carried out according to the monitoring results of the voltage, such as reactive power compensation devices, overvoltage control devices, etc. However, the existing technical solutions have the following technical problems: When performing voltage control processing, in the existing technical solutions, the voltage control processing is often carried out after the transmission voltage deviates. Once the voltage deviation occurs, the reactive power compensation device may be difficult to meet the voltage control requirements due to the small compensation capacity. Therefore, how to perform early reactive power control processing to avoid the situation where the voltage cannot be effectively controlled and ensure the operation stability of the transmission line has become an urgent technical problem to be solved.

[0004] To solve the above technical problems, the present application provides a voltage control method and system for a transmission line considering the access of new energy. Summary of the Invention

[0005] To achieve the object of the present invention, the present invention adopts the following technical solutions: Specifically, the present application provides a voltage control method for a transmission line considering the access of new energy, which specifically includes: S1 When the impact risk of node overlimit in the preset coefficient interval is determined based on the composition data of the new energy power generation of the transmission line in different time periods and the composition data of the new energy power generation of the access nodes of the new energy equipment, the next step is entered; S2 Determine the access types of different access nodes based on the composition data of the energy storage devices of the new energy equipment, and determine the concerned access nodes according to the abnormal fluctuation data and power generation data of the historical power generation of a class of access nodes in the time period; S3 Obtain the similarity of the abnormal fluctuation trends of the historical power generation of different concerned access nodes in the time period. When it is determined that the fluctuation impact situation meets the requirements, the next step is entered; S4 determines the processing method for voltage control of the transmission line based on the power transmission interval in which the power transmission volume in the transmission line is located, considering the similarity of the abnormal fluctuation trends of the power generation of different first-type access nodes, and combining the similarity of the abnormal fluctuation trends of the power generation between the second-type access nodes and the first-type access nodes.

[0006] The beneficial effects of the present invention are as follows: Based on the composition data of the new energy power generation in different time periods of the transmission line and the composition data of the new energy power generation of the access nodes of the new energy equipment, it is determined whether the influence risk of node over-limit in the time period is within the preset coefficient interval. Considering the differences in the on-grid power of the new energy equipment in the transmission line in different time periods due to the influence of data such as the amount of sunlight in different time periods, a differential voltage control strategy is generated in different time periods according to the differences in power generation, ensuring the reliability of the voltage control of the transmission line.

[0007] Determine the processing method for voltage control of the transmission line according to the similarity of the abnormal fluctuation trends of the power generation of different first-type access nodes and the similarity of the abnormal fluctuation trends of the power generation between the second-type access nodes and the first-type access nodes. It not only singlely considers the differences in the voltage over-limit risks caused by the coincidence of the fluctuation trends at the abnormal fluctuation moments of the first-type access nodes, but also further combines the similarity of the abnormal fluctuation trends of the power generation between the second-type access nodes and the first-type access nodes, realizing the generation of a differential voltage control method for the differences in the probabilities of voltage over-limit risks caused by different second-type access nodes. Furthermore, on the basis of ensuring the on-grid power, the advance control and processing of voltage are realized, avoiding the occurrence of the technical problem of relatively large influence risks of voltage over-limit caused by the voltage monitoring method.

[0008] A further technical solution is that the composition data of the new energy power generation includes the proportion of the new energy power generation in the transmission line and the new energy power generation.

[0009] A further technical solution is that the composition data of the new energy power generation is determined according to the new energy power generation of the transmission line on different dates.

[0010] A further technical solution is that the composition data of the new energy power generation of the access nodes of the new energy equipment includes the new energy power generation of different access nodes.

[0011] A further technical solution is that the method for determining the influence risk of node over-limit in the time period is as follows: Based on the composition data of the new energy power generation of the transmission line on different dates in the time period, determine the composition proportion of the new energy power generation of the transmission line in the time period; Determine the constituent risk date in the date based on the said constituent ratio and the new energy power generation amount; Determine the influence risk of node over-limit in the said time period through the constituent data of the new energy power generation amount of the access nodes in the said constituent risk date.

[0012] A further technical solution lies in that the method for determining the processing method of voltage control of the said transmission line is as follows: Based on the transmission power amount interval where the transmission power amount in the said transmission line is located, determine the corresponding transmission power amount interval of the said transmission line, and use it as the matching transmission power amount interval; Based on the similarity of the abnormal fluctuation trends of the power generation amounts of different types of access nodes, determine the moment when the fluctuation trends of the abnormal fluctuation moments of different types of access nodes are all consistent, and use it as the first type of consistent moment; According to the similarity of the abnormal fluctuation trends of the power generation amounts of the second type of access nodes and the first type of access nodes, determine the moment when the fluctuation trends of the abnormal fluctuation moments of the second type of access nodes and the first type of access nodes are all consistent among the first type of consistent moments, and use it as the fluctuation matching moment; According to the said matching transmission power amount interval, the constituent data of the power generation amount of the new energy equipment, the number of the first type of consistent moments in the recent preset time period, the number of the fluctuation matching moments of the second type of access nodes, and the power generation amount, determine the processing method of voltage control of the said transmission line.

[0013] On the other hand, the present invention provides a computer system, including: a memory and a processor connected by communication, and a computer program stored on the said memory and capable of running on the said processor, and when the said processor runs the said computer program, it executes the above-mentioned voltage control method for a transmission line considering new energy access.

[0014] Other features and advantages will be described in the subsequent description, and some of them will become obvious from the description, or be understood by implementing the present invention. The objectives and other advantages of the present invention are realized and obtained by the structures specifically pointed out in the description and the drawings.

[0015] To make the above-mentioned objectives, features and advantages of the present invention more obvious and understandable, the following specifically enumerates preferred embodiments and, in conjunction with the attached drawings, makes detailed descriptions as follows. Description of the Drawings

[0016] By referring to the drawings and describing its exemplary embodiments in detail, the above and other features and advantages of the present invention will become more obvious.

[0017] Figure 1 It is a flowchart of a voltage control method for a transmission line considering new energy access; Figure 2Flowchart of a method for determining the impact risk of node over - limit in a time period Figure 3 Flowchart of a method for determining the concerned access nodes Figure 4 Flowchart for determining that the fluctuation impact situation meets the requirements Detailed implementation mode

[0018] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. Like reference numerals in the figures denote like or similar structures, and thus their detailed description will be omitted.

[0019] The terms "a", "an", "the", and "said" are used to denote the presence of one or more elements / components / etc.; the terms "comprising" and "having" are used to mean an open - ended inclusion and refer to the presence of additional elements / components / etc. in addition to the listed elements / components / etc.

[0020] Embodiment 1 To solve the above - mentioned problems, according to one aspect of the present invention, as Figure 1 shown, a voltage control method for a transmission line considering new - energy access is provided, specifically including: S1 When determining that the impact risk of node over - limit in the time period is within a preset coefficient range based on the composition data of new - energy power generation in different time periods of the transmission line and the composition data of new - energy power generation at the access nodes of new - energy devices, proceed to the next step; Furthermore, the composition data of the new - energy power generation includes the proportion of new - energy power generation in the transmission line and the new - energy power generation amount.

[0021] Specifically, the composition data of the new - energy power generation is determined according to the new - energy power generation of the transmission line on different dates.

[0022] It should be noted that the composition data of the new - energy power generation at the access nodes of the new - energy devices includes the new - energy power generation amounts at different access nodes.

[0023] Specifically, as Figure 2 shown, the method for determining the impact risk of node over - limit in the time period is: Based on the composition data of new - energy power generation of the transmission line on different dates in the time period, determine the composition proportion of the new - energy power generation of the transmission line in the time period; Determine the composition risk date in the date based on the composition ratio and the new energy power generation amount; Determine the influence risk of node over-limit in the time period through the composition data of the new energy power generation amount of the access nodes in the composition risk date.

[0024] Specifically, the composition risk date is the date when both the composition ratio and the new energy power generation amount do not meet the requirements. Specifically, the date when both the composition ratio and the new energy power generation amount are excessive, that is, not within the preset range, is used as the composition risk date.

[0025] It can be understood that determining the influence risk of node over-limit in the time period through the composition data of the new energy power generation amount of the access nodes in the composition risk date specifically includes: Based on the composition data of the new energy power generation amount of the access nodes in the composition risk date, determine the access nodes where the composition ratio of the new energy power generation amount in the transmission line is greater than the preset ratio threshold as the fluctuation influence nodes; Take the composition risk date where the quantity ratio of the fluctuation influence nodes in the access nodes is greater than the preset quantity ratio as the influence date, and take the quantity ratio of the influence date in the dates as the influence risk of node over-limit in the time period.

[0026] It can be understood that the value range of the influence risk of node over-limit in the time period is between 0 and 1. When the influence risk of node over-limit in the time period is not within the preset coefficient interval, if the influence risk of node over-limit in the time period is greater than the preset coefficient threshold, then for the second-class access nodes, the load fluctuation at the access point is suppressed through the energy storage device to keep it at the preset access power generation amount.

[0027] If the influence risk of node over-limit in the time period is greater than the preset coefficient threshold, then according to the monitoring data of the voltage in the transmission line, when there is voltage over-limit, use the voltage control device of the transmission line to keep the voltage of the transmission line stable.

[0028] In another embodiment, the method for determining the influence risk of node over-limit in the time period is: Based on the composition data of the new energy power generation amount of the transmission line on different dates in the time period, determine the composition ratio of the new energy power generation amount of the transmission line in the time period and the new energy power generation amounts on different dates; It can be understood that in the above steps, if the composition ratio of the new energy power generation and the average value of the new energy power generation of the transmission lines on different dates both meet the requirements during the said period, it indicates that the new energy power generation is less during the said period. Therefore, when the power generation of the new energy equipment fluctuates at this time, the risk of voltage over-limit of the transmission line is relatively small. Thus, it can be determined that during the said period, according to the monitoring data of the voltage in the transmission line, when there is a voltage over-limit, the voltage control device of the transmission line is used to maintain the voltage stability of the transmission line.

[0029] In addition, it should be noted that if either the composition ratio of the new energy power generation or the average value of the new energy power generation of the transmission lines on different dates during the said period does not meet the requirements, and if both the composition ratio of the new energy power generation and the average value of the new energy power generation of the transmission lines on different dates during the said period do not meet the requirements, then the influence risk when the power generation of the new energy equipment fluctuates at this time is relatively large. Therefore, it can be directly determined that for the second-type access nodes, the energy storage device is used to suppress the load fluctuation at the access point and keep it at the preset access power generation.

[0030] It should be further noted that to determine whether the requirements are met, it can be determined by whether the average value of the composition ratio or the average value of the new energy power generation is within the preset range.

[0031] Based on the composition ratio and the new energy power generation, determine the composition risk date in the said date. Through the composition data of the new energy power generation of the access nodes in the composition risk date, determine the access nodes where the composition ratio of the new energy power generation in the transmission line is greater than the preset ratio threshold as the fluctuation influence nodes; It can be understood that before proceeding to the next step, it is also necessary to determine whether the quantity ratio of the composition risk dates meets the requirements. Specifically, when the quantity ratio of the composition risk dates is relatively large, that is, greater than a certain threshold, it indicates that due to the influence of weather data such as the amount of sunlight in the current period, the power generation of the current date is relatively large. Therefore, it can be directly determined that for the second-type access nodes, the energy storage device is used to suppress the load fluctuation at the access point and keep it at the preset access power generation.

[0032] In addition, if the quantity ratio of the composition risk dates meets the requirements, and at the same time there are no fluctuation influence nodes in different composition risk dates, it indicates that the power generation of different access nodes is relatively small. Therefore, on this basis, when different access nodes have load fluctuations, the probability of affecting the voltage deviation of the overall transmission line is relatively small. In this case, according to the monitoring data of the voltage in the transmission line during the said period, when there is a voltage over-limit, the voltage control device of the transmission line is used to maintain the voltage stability of the transmission line.

[0033] In addition, it should be noted that when the voltage control device of the transmission line fails to maintain the voltage stability of the transmission line, it is necessary to enable the energy storage device of the second-class access node with a power generation greater than the threshold, so as to ensure that the second-class access node with a power generation greater than the threshold is maintained at the preset access power generation.

[0034] Specifically, if there are nodes affected by fluctuations in the risk dates, when the proportion of the number of nodes affected by fluctuations in the access nodes in a risk date is greater than the preset proportion, the risk date is used as the impact date. When the proportion of the impact dates in the dates does not meet the requirements, that is, when it is greater than a certain threshold, it indicates that due to the influence of weather data such as the current illumination amount, the power generation on the current date is relatively large. Therefore, it can be directly determined that for the second-class access nodes, the energy storage device is used to suppress the load fluctuations at the access points and keep them at the preset access power generation.

[0035] The preset access power generation of different access nodes is determined according to the preset control amount of the power generation of the access nodes. Only when the proportion of the impact dates in the dates meets the requirements, the impact risk of node overlimit in the time period is determined.

[0036] Based on the number of nodes affected by fluctuations in different risk dates and the number of risk dates, the impact risk of node overlimit in the time period is determined.

[0037] In a possible embodiment, specifically, the impact risk of node overlimit in the time period is determined according to the product of the average value of the proportion of the number of nodes affected by fluctuations in different risk dates in the access nodes and the proportion of the number of risk dates.

[0038] S2 determines the access types of different access nodes according to the composition data of the energy storage devices of the new energy equipment, and determines the concerned access nodes according to the abnormal fluctuation data and power generation data of the historical power generation of the first-class access nodes in the time period; Specifically, the method for determining the access type of the access node is as follows: When there is an energy storage device at the access node, it is regarded as a second-class access node. When there is no energy storage device at the access node, it is regarded as a first-class access node.

[0039] Specifically, as Figure 3 shown, the method for determining the concerned access node is as follows: Based on the power generation data of the first-class access nodes in the time period, the average power generation of the first-class access nodes on different dates in the time period is determined; Based on the abnormal fluctuation data of the historical power generation of the first type of access node during the time period, determine the average value of the number of abnormal fluctuation moments on different dates of the first type of access node during the time period, and use it as the average fluctuation number; Based on the average power generation and the average fluctuation number, determine whether the first type of access node is a concerned access node.

[0040] It can be understood that the abnormal fluctuation moment is the moment when the change amount of the power generation from the previous moment does not meet the requirements, and specifically, it is determined whether it meets the requirements according to whether it is greater than the preset change amount threshold.

[0041] In addition, it should be noted that when the average power generation of the first type of access node is within the preset power generation range and the average fluctuation number is greater than the preset fluctuation number threshold, then it is determined that the first type of access node is a concerned access node.

[0042] In another embodiment, the method for determining the concerned access node is as follows: Based on the power generation data of the first type of access node during the time period, determine the historical power generation of the first type of access node on different dates during the time period, and use the dates with historical power generation within the preset power generation range as the power generation concerned dates; Based on the abnormal fluctuation data of the historical power generation of the first type of access node during the time period, determine the number of abnormal fluctuation moments of the first type of access node during the time period of the power generation concerned dates, and use it as the fluctuation number; Based on the fluctuation number during the time period of the power generation concerned dates, determine whether the first type of access node is a concerned access node.

[0043] Specifically, when the number of power generation concerned dates with the fluctuation number not meeting the requirements does not meet the requirements, then it is determined that the first type of access node is a concerned access node.

[0044] S3 Obtain the similarity of the abnormal fluctuation trends of the historical power generation of different concerned access nodes during the time period. When it is determined that the fluctuation influence situation meets the requirements based on the similarity, proceed to the next step; Specifically, as Figure 4 shown, determining that the fluctuation influence situation meets the requirements specifically includes: Obtain the number of the concerned access nodes; Based on the similarity of the abnormal fluctuation trends of the historical power generation of different concerned access nodes during the time period, determine the moments when the abnormal fluctuation trends of different concerned access nodes on different dates are all consistent, and use it as the fluctuation consistent moment; Based on the number of the concerned access nodes and the number of the fluctuation consistent moments on different dates, determine whether the fluctuation influence situation meets the requirements.

[0045] It is understandable that when the power generation amounts connected to the power transmission line all increase or all decrease, the moments with the same fluctuation trend are determined.

[0046] Specifically, when the number of concerned access nodes is greater than the preset threshold of the number of concerned nodes and the average value of the number of the same fluctuation moments in different dates is greater than the preset threshold of the number of the same moments, it is determined that the fluctuation influence situation does not meet the requirements.

[0047] It is understandable that when the fluctuation influence situation does not meet the requirements, it indicates that the composition data of the new energy devices of different concerned access nodes are relatively similar. Therefore, on this basis, the probability of simultaneous fluctuations is relatively large. Therefore, on the basis of the risk of a certain node exceeding the limit, it can be directly determined that the fluctuation influence situation does not meet the requirements. Therefore, in this time period, for the type-II access nodes, the energy storage device is used to suppress the load fluctuation at the access point to keep it within the preset access power generation amount.

[0048] In another embodiment, determining that the fluctuation influence situation meets the requirements specifically includes: Obtain the number of the concerned access nodes, and determine the moments when the abnormal fluctuation trends of the historical power generation amounts of different concerned access nodes in the time period are the same, and use them as the same fluctuation moments according to the similarity of the abnormal fluctuation trends of different concerned access nodes in different dates; Specifically, in the above steps, when the number of concerned nodes is small, that is, less than the threshold, it can be determined that the fluctuation influence situation meets the requirements at this time.

[0049] In addition, it should be noted that when the number of concerned nodes is large, that is, greater than a certain threshold of the number of concerned nodes, it can be determined that the fluctuation influence situation does not meet the requirements at this time.

[0050] In addition, it should be noted that when the number of concerned nodes is not large, it is necessary to determine whether the average value of the number of the same fluctuation moments in different dates meets the requirements. Specifically, when the average value of the number of the same fluctuation moments in different dates does not meet the requirements, the risk of fluctuation influence is relatively large at this time. Therefore, it can be directly determined that the fluctuation influence situation does not meet the requirements.

[0051] Even when the average value of the number of the same fluctuation moments in different dates meets the requirements, it is still necessary to determine whether there is a date when the number of the same fluctuation moments does not meet the requirements, that is, the date when the number of the same fluctuation moments is greater than the preset number. If not, it can be determined that the fluctuation influence situation meets the requirements, and if so, proceed to the next step.

[0052] Obtain the composition data of the concerned access nodes with consistent fluctuation trends at different abnormal fluctuation moments of different concerned access nodes, determine the number of overlapping abnormal fluctuation moments between the concerned access nodes and different concerned access nodes, and based on the number of the abnormal fluctuation moments, determine the fluctuation correlation value between the concerned nodes; In addition, it should be noted that in one possible embodiment, the fluctuation attention value between the concerned nodes is determined according to the ratio of the number of abnormal fluctuation moments to the date.

[0053] In one possible embodiment, if the fluctuation correlation values between different concerned nodes are all less than the preset correlation threshold, it indicates that the composition of the new energy devices between different concerned nodes is not similar, so the risk of simultaneous abnormal fluctuations is small, and then it can be directly determined that the fluctuation influence situation meets the requirements.

[0054] In addition, when there are concerned nodes with a fluctuation correlation value not less than the preset correlation threshold, they are used as strongly correlated nodes. When the number of strongly correlated nodes is large, that is, greater than a certain number threshold, it is determined that the fluctuation influence situation does not meet the requirements, and in other cases, it proceeds to the next step.

[0055] Determine whether the fluctuation influence situation meets the requirements according to the number of concerned access nodes and the fluctuation correlation value between different concerned nodes.

[0056] In one possible embodiment, according to the fluctuation correlation value between different concerned nodes and the number of concerned access nodes, the sum of the fluctuation correlation values of different concerned access nodes is determined. When the sum of the fluctuation correlation values of the concerned access nodes does not meet the requirements, that is, is greater than a certain correlation threshold, it is determined that the fluctuation influence situation does not meet the requirements.

[0057] S4 Based on the power transmission interval of the transmitted power in the transmission line, determine the processing method of voltage control of the transmission line according to the similarity of the abnormal fluctuation trends of the power generation of different first-class access nodes and in combination with the similarity of the abnormal fluctuation trends of the power generation of the second-class access nodes and the first-class access nodes.

[0058] Specifically, the method for determining the processing method of voltage control of the transmission line is as follows: Based on the power transmission interval of the transmitted power in the transmission line, determine the corresponding power transmission interval of the transmission line and use it as the matching power transmission interval; Based on the similarity of the abnormal fluctuation trends of the power generation of different first-class access nodes, determine the moments when the fluctuation trends of the abnormal fluctuation moments of different first-class access nodes are all consistent, and use them as the first-class consistent moments; Determine the moments when the fluctuation trends of the secondary access nodes are consistent with those of the abnormal fluctuation moments of the primary access nodes among the primary consistent moments according to the similarity of the abnormal fluctuation trends of the power generation amounts of the secondary access nodes and the primary access nodes, and use them as the fluctuation matching moments; Determine the processing method for voltage control of the transmission line according to the matched transmission power range, the composition data of the power generation amount of the new energy device, the number of primary consistent moments in the recent preset time period, the number of fluctuation matching moments of the secondary access nodes, and the power generation amount.

[0059] Specifically, the matched transmission power range is the transmission power range with the most falling moments of the transmitted power in the recent preset time period.

[0060] When the matched transmission power range is the transmission power range corresponding to being greater than the preset transmission power threshold, the transmitted power is relatively large at this time. As long as the power generation amount of the new energy system fluctuates, there is a relatively large risk of over-limit. Therefore, it can be directly determined that for the secondary access nodes, the load fluctuation of the access point is suppressed through the energy storage device to keep it at the preset access power generation amount. If the matched transmission power range does not belong to the matched transmission power range within the preset range, the transmitted power is relatively small at this time. Therefore, it can be directly determined that according to the monitoring data of the voltage in the transmission line during the time period, when there is a voltage over-limit, the voltage control device of the transmission line is used to keep the voltage of the transmission line stable.

[0061] If the matched transmission power range belongs to the matched transmission power range within the preset range, the transmitted power is not too small at this time. Therefore, if the number of primary consistent moments does not meet the requirements, that is, when it is greater than a certain number threshold, the fluctuation risk of the primary access nodes is relatively large at this time. Therefore, it can be directly determined that for the secondary access nodes, the load fluctuation of the access point is suppressed through the energy storage device to keep it at the preset access power generation amount.

[0062] When the number of primary consistent moments is small, that is, when it is less than the preset value of the consistent number, the fluctuation risk is too small at this time. Therefore, it can be determined that according to the monitoring data of the voltage in the transmission line during the time period, when there is a voltage over-limit, the voltage control device of the transmission line is used to keep the voltage of the transmission line stable.

[0063] In addition, if the number of a certain type of consistent moments meets the requirements but is not less than the consistent quantity threshold, it is also necessary to determine whether the number of fluctuation matching moments and the power generation amount of different second-class access nodes do not meet the requirements. At this time, for the second-class access nodes that do not meet the requirements, it can be directly determined that for their energy storage devices, according to the proportion of the number of fluctuation matching moments in the number of the certain type of consistent moments, as the fluctuation proportion. When the fluctuation proportion is greater than 0.6, it is determined to use the energy storage device of the access node to perform energy storage processing on the power generation amount of the access point and not connect it to the power grid. While for the fluctuation proportion below 0.6, the energy storage proportion of the power generation amount of the access node is determined according to the fluctuation proportion, and the energy storage processing of the power generation amount of the access point is performed at the energy storage proportion, and the remaining power generation amount continues to be connected to the power grid.

[0064] In addition, it should be noted that if the number of fluctuation matching moments of the second-class access node does not meet the requirements while the power generation amount meets the requirements, it is determined that for all second-class access nodes, the energy storage device is used to suppress the load fluctuation of the access point to keep it at the preset access power generation amount, and as long as the number of fluctuation matching moments of the second-class access node meets the requirements, there is no need to use the energy storage device to perform energy storage processing on the power generation amount.

[0065] Embodiment 2 On the other hand, the present invention provides a computer system, including: a memory and a processor connected by communication, and a computer program stored on the memory and capable of running on the processor. When the processor runs the computer program, it executes the above-mentioned voltage control method for a transmission line considering new energy access.

[0066] Each embodiment in this specification is described in a progressive manner. The same or similar parts among the embodiments can be referred to each other, and the key points of each embodiment are the differences from other embodiments. In particular, for the embodiments of the device, equipment, and non-volatile computer storage medium, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can refer to the partial description of the method embodiments.

[0067] The above describes specific embodiments of this specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be executed in a different order from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In certain embodiments, multi-tasking and parallel processing are also possible or may be advantageous.

[0068] The above description is only for one or more embodiments of this specification and is not intended to limit this specification. For those skilled in the art, various changes and modifications can be made to one or more embodiments of this specification. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of one or more embodiments of this specification shall be included within the scope of the claims of this specification.

Claims

1. A voltage control method for a transmission line considering the access of new energy, characterized in that Specifically include: When the impact risk of node over - limit in the time period is within the preset coefficient range determined by the composition data of new - energy power generation of the transmission line in different time periods and the composition data of new - energy power generation of the access nodes of new - energy equipment, proceed to the next step; Determine the access types of different access nodes according to the composition data of the energy - storage devices of new - energy equipment, and determine the concerned access nodes according to the abnormal fluctuation data and power - generation data of the historical power generation of a certain type of access nodes in the time period; Obtain the similarity of the abnormal fluctuation trends of the historical power generation of different concerned access nodes in the time period. When it is determined that the fluctuation impact situation meets the requirements based on the similarity, proceed to the next step; Based on the power - transmission amount range in the transmission line, determine the processing method of voltage control of the transmission line according to the similarity of the abnormal fluctuation trends of the power generation of different certain types of access nodes, and in combination with the similarity of the abnormal fluctuation trends of the power generation of the second - type access nodes and the first - type access nodes.

2. The voltage control method for a transmission line considering new energy access according to claim 1, wherein The composition data of the new - energy power generation includes the proportion of new - energy power generation in the transmission line and the new - energy power generation amount.

3. The voltage control method for a power transmission line considering new energy access according to claim 1, wherein The composition data of the new - energy power generation is determined according to the new - energy power generation of the transmission line on different dates.

4. The voltage control method for a transmission line considering new energy access according to claim 1, wherein, The method for determining the impact risk of node over - limit in the time period is as follows: Determine the composition proportion of new - energy power generation of the transmission line in the time period based on the composition data of new - energy power generation of the transmission line on different dates in the time period; Based on the composition proportion and the new - energy power generation amount, determine the composition risk date in the date; Through the composition data of the new - energy power generation of the access nodes in the composition risk date, determine the impact risk of node over - limit in the time period.

5. The voltage control method for a transmission line considering new energy access according to claim 4, characterized in that, The composition risk date is the date when both the composition proportion and the new - energy power generation amount do not meet the requirements.

6. The voltage control method for a transmission line considering new energy access according to claim 1, characterized in that, The method for determining the access type of the access node is as follows: When the access node has an energy - storage device, it is regarded as a second - type access node; when the access node does not have an energy - storage device, it is regarded as a first - type access node.

7. The voltage control method for a transmission line considering new energy access according to claim 1, characterized in that, The method for determining the concerned access node is as follows: Based on the power - generation data of a certain type of access nodes in the time period, determine the average power - generation amount of the certain type of access nodes on different dates in the time period; According to the abnormal fluctuation data of the historical power generation of a certain type of access nodes in the time period, determine the average value of the number of abnormal fluctuation moments of the certain type of access nodes on different dates in the time period, and use it as the average fluctuation number; According to the average power - generation amount and the average fluctuation number, determine whether the certain type of access node is a concerned access node.

8. The voltage control method for a transmission line considering new energy access according to claim 7, characterized in that The abnormal fluctuation moment is the moment when the change amount of the power generation compared with the previous moment does not meet the requirements.

9. The voltage control method for a transmission line considering new energy access according to claim 1, characterized in that, The method for determining the processing method of voltage control of the transmission line is as follows: Based on the power - transmission amount range in the transmission line, determine the corresponding power - transmission amount range of the transmission line, and use it as the matching power - transmission amount range; Based on the similarity of the abnormal fluctuation trends of the power generation amounts of different types of access nodes, determine the moments when the fluctuation trends of the abnormal fluctuation moments of different types of access nodes are all consistent, and use them as the first type of consistent moments; According to the similarity of the abnormal fluctuation trends of the power generation amounts of the second type of access nodes and the first type of access nodes, determine the moments when the fluctuation trends of the abnormal fluctuation moments of the second type of access nodes and the first type of access nodes are all consistent among the first type of consistent moments, and use them as the fluctuation matching moments; According to the matching power transmission amount interval, the composition data of the power generation amount of the new energy device, the number of the first type of consistent moments in the recent preset time period, the number of the fluctuation matching moments of the second type of access nodes, and the power generation amount, determine the processing method for voltage control of the transmission line.

10. A computer system, comprising: A memory and a processor connected by communication, and a computer program stored on the memory and capable of running on the processor, wherein when the processor runs the computer program, it executes a method for voltage control of a transmission line considering new energy access according to any one of claims 1-9.

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