Novel power system power distribution network voltage regulation resource comprehensive configuration method and system

Abstract

The invention discloses a novel power system power distribution network voltage regulation resource comprehensive configuration method and system, and the method comprises the steps: carrying out the judgment of the node attribute and the out-of-limit amplitude of each voltage out-of-limit node in a power distribution network in a day time period and a night time period; dividing the capacity of reactive power voltage regulation equipment capable of being added to each type of nodes in the power distribution network according to a reactive power voltage regulation equipment configuration criterion by combining the out-of-limit amplitude of the voltage out-of-limit node and the node attribute; based on the capacity configuration scheme of the reactive voltage regulation equipment, node attributes and out-of-limit amplitudes of all voltage out-of-limit nodes in the power distribution network are judged again; and based on the recalculated node attribute and the out-of-limit amplitude of each voltage out-of-limit node, according to an energy storage equipment configuration criterion, obtaining a configuration scheme of energy storage equipment resources. According to the method, the problem that a comprehensive and quantifiable voltage regulation resource configuration method is lacked in the voltage regulation resource configuration of the power distribution network in a novel power system is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of distribution network planning and operation, and in particular to a novel method and system for comprehensive configuration of voltage regulation resources in a distribution network of a power system. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] With the gradual construction and development of new power systems, distributed renewable power sources and high-energy-consuming industrial and commercial loads are widely connected to the distribution network. The capacity of distributed photovoltaic power generation equipment in the distribution network is gradually increasing. During the daytime, the voltage of some nodes in the distribution network rises above the upper limit. The access capacity of high-energy-consuming industrial and commercial loads in the distribution network is increasing rapidly. During the peak load period at night, the voltage of some nodes in the distribution network drops below the lower limit. In addition, the planning and construction of the distribution network of the new power system is somewhat advanced. In some areas, a large number of cable lines are built in the distribution network as a reserve of power supply facilities for the later stage. Due to the existence of the "capacity increase effect" of cable equipment, such advanced distribution networks have the problem of voltage exceeding the upper limit.

[0004] The above-mentioned new power system distribution network presents operating characteristics, which leads to increasingly serious node voltage over-limit problems in the distribution network, bringing operational risks to the operation of the new power system distribution network and seriously restricting the power supply level of the new power system distribution network.

[0005] At present, there have been studies on the analysis of voltage over-limit problems in distribution networks and the allocation of governance resources. A common method is to analyze the voltage problems at key load nodes, and configure on-load tap-changing transformers, static reactive voltage regulators and other equipment as voltage regulation resources at such key load nodes. The inventors found that the current analysis and resource allocation of nodes with serious voltage over-limit in the operation of distribution networks mostly only target key load nodes and key network nodes, and configure on-load tap-changing transformers and refined reactive regulation equipment as governance resources. There is still a lack of systematic analysis of the over-limit amplitude and node attributes of each operating node in the distribution network. At the same time, it has not yet considered the comprehensive configuration of three types of voltage regulation resources, namely adjustable reactors, capacitors, and energy storage devices, based on the systematic analysis of over-limit of distribution network nodes.

[0006] Under the background of rapid construction of new power systems, distributed photovoltaic equipment and high-energy-consuming industrial and commercial loads have increased year by year, and the problem of voltage over-limit has begun to emerge during the operation of distribution networks. If the voltage over-limit attributes of each node in the distribution network are not systematically judged based on the operation status analysis, and the relatively limited reactive and active regulation resources are not comprehensively configured, the safe and stable operation characteristics of the distribution network will be severely restricted, and even equipment failures and economic losses on the load side will be caused. Summary of the invention

[0007] In order to solve the above problems, the present invention proposes a new method and system for comprehensive configuration of voltage regulation resources in the power system distribution network, which sequentially screens and determines the access location and capacity of reactive voltage regulation equipment and energy storage equipment, and realizes the layout and capacity allocation of voltage regulation resources in the new power system.

[0008] In some embodiments, the following technical solutions are adopted:

[0009] A novel comprehensive configuration method for voltage regulation resources of a power distribution network, comprising:

[0010] During the daytime and nighttime, the node attributes and over-limit amplitude of each voltage over-limit node in the distribution network are judged respectively;

[0011] Combined with the voltage over-limit node over-limit amplitude and node attributes, according to the reactive voltage regulation equipment configuration criteria, the capacity of reactive voltage regulation equipment that can be added to each type of node in the distribution network is divided;

[0012] Based on the capacity configuration plan of reactive voltage regulation equipment, the node attributes and over-limit amplitude of each voltage over-limit node in the distribution network are re-judged;

[0013] Based on the recalculated node attributes and the voltage over-limit amplitude of each voltage over-limit node, and according to the energy storage device configuration criteria, a configuration scheme for energy storage device resources is obtained.

[0014] As a further solution, during the daytime, the node attributes of each voltage-over-limit node in the distribution network are determined, specifically:

[0015] Classify the nodes where the photovoltaic related voltage exceeds the upper limit:

[0016]

[0017] in, is the set of nodes where the photovoltaic access voltage exceeds the upper limit during the daytime; V k is the voltage amplitude of node k; V UL is the upper limit of node voltage; P k PV Connect PV power to node k; It is the set of adjacent nodes where the photovoltaic access voltage exceeds the upper limit during the daytime;

[0018] In the set of all nodes, and The nodes in the table are excluded; the remaining nodes are classified into the nodes where the load-related voltage exceeds the lower limit:

[0019]

[0020] in, The voltage lower limit node set for the load power that exceeds the judgment limit during the daytime period; V LL is the lower limit of node voltage; P k LD is the load power of node k; Determine the limit value for load access; It is a set of nodes where the load power connected during the daytime does not exceed the judgment limit, but the voltage exceeds the lower limit.

[0021] As a further solution, during the daytime or nighttime, the voltage over-limit amplitude of the voltage over-limit node is calculated, specifically:

[0022]

[0023] Among them, V k,CL is the voltage over-limit amplitude of node k; V0 is the nominal voltage of the node.

[0024] As a further solution, during the night time, the node attributes of each voltage-over-limit node in the distribution network are determined, specifically:

[0025] Classify the nodes where the cable-related voltage exceeds the upper limit:

[0026]

[0027] in, The voltage upper limit node set is the node set whose cable reactance value exceeds the reactance value judgment limit during the night time period; The reactance value of node k is connected; It is the limit value for reactance judgment; The node set adjacent to the access voltage upper limit node whose access cable reactance value exceeds the reactance value judgment limit during night time;

[0028] In the set of all nodes, and The nodes in the table are excluded, and the remaining nodes are classified into load-related voltage exceeding the lower limit nodes:

[0029]

[0030] in, The voltage lower limit node set for the load power that exceeds the judgment limit during the night period; V LL is the lower limit of node voltage; P k LD is the load power of node k; Determine the limit value for load access; It is the set of nodes other than the nodes where the load power connected during the night period does not exceed the judgment limit and the voltage exceeds the lower limit.

[0031] As a further solution, combined with the voltage over-limit node over-limit amplitude and node attributes, according to the reactive voltage regulation equipment configuration criteria, the capacity of reactive voltage regulation equipment that can be added to each type of node in the distribution network is divided, including:

[0032] According to the reactor configuration criteria, the reactor capacity that can be added to each type of node in the distribution network is divided. The configuration criteria for the reactor capacity are:

[0033]

[0034] Among them, A k,Rt The reactor capacity configured for node k; A Rt The total capacity of the reactor to be configured in the system; Configure the proportional coefficient for the reactor of the node whose cable reactance value exceeds the reactance value judgment limit, V k,CL is the voltage over-limit amplitude of node k, The voltage upper limit node set is the node set whose cable reactance value exceeds the reactance value judgment limit during the night time period; The node set adjacent to the access voltage upper limit node whose access cable reactance value exceeds the reactance value judgment limit during night time; It is the set of adjacent nodes where the photovoltaic access voltage exceeds the upper limit during the daytime.

[0035] As a further solution, combined with the voltage over-limit node over-limit amplitude and node attributes, according to the reactive voltage regulation equipment configuration criteria, the capacity of reactive voltage regulation equipment that can be added to each type of node in the distribution network is divided, including:

[0036] According to the capacitor configuration criteria, the capacity of capacitors that can be added to each type of node in the distribution network is divided. The capacitor configuration criteria are:

[0037]

[0038] Among them, A k,Cp The capacitor capacity configured for node k; A Cp The total capacity of the reactor to be configured in the system; A proportional coefficient is configured for capacitors connected to nodes where the load power exceeds the judgment limit.

[0039] As a further solution, based on the recalculated node attributes and the voltage over-limit amplitude of each voltage over-limit node, according to the energy storage device configuration criteria, a configuration scheme for energy storage device resources is obtained, specifically:

[0040]

[0041] Among them, A k,ES The capacity of energy storage equipment configured for node k; A ESis the total capacity of energy storage equipment to be configured in the system; n H ,PV Configure the proportionality factor for capacitors with photovoltaic access nodes; The proportion of energy storage equipment configured for large-capacity load nodes; The recalculated nodes are as follows: the set of nodes whose PV access voltage exceeds the upper limit during the daytime, the set of nodes whose voltage is below the lower limit during the daytime and whose load power exceeds the judgment limit, the set of nodes whose voltage is below the lower limit during the nighttime and whose load power exceeds the judgment limit, the set of nodes whose load power does not exceed the judgment limit but whose voltage is below the lower limit during the daytime, and the set of nodes other than the nodes whose load power does not exceed the judgment limit and whose voltage is above the lower limit during the nighttime.

[0042] In other embodiments, the following technical solutions are adopted:

[0043] A new type of comprehensive configuration system for voltage regulation resources of power distribution network, including:

[0044] The node attribute and over-limit amplitude judgment module is used to judge the node attribute and over-limit amplitude of each voltage over-limit node in the distribution network during the daytime and nighttime respectively;

[0045] The reactive voltage regulation equipment configuration module is used to divide the capacity of reactive voltage regulation equipment that can be added to each type of node in the distribution network according to the reactive voltage regulation equipment configuration criteria, combining the voltage over-limit node over-limit amplitude and node attributes;

[0046] The node attribute and over-limit amplitude secondary judgment module is used to re-judge the node attribute and over-limit amplitude of each voltage over-limit node in the distribution network based on the capacity configuration plan of the reactive voltage regulation equipment;

[0047] The energy storage device configuration module is used to obtain a configuration plan for energy storage device resources based on the recalculated node attributes and over-limit amplitudes of each voltage over-limit node and according to the energy storage device configuration criteria.

[0048] In other embodiments, the following technical solutions are adopted:

[0049] A terminal device comprises a processor and a memory, wherein the processor is used to implement instructions; the memory is used to store a plurality of instructions, wherein the instructions are suitable for being loaded by the processor and executing the above-mentioned novel method for comprehensive configuration of voltage regulation resources of a power system distribution network.

[0050] In other embodiments, the following technical solutions are adopted:

[0051] A computer-readable storage medium stores a plurality of instructions, wherein the instructions are suitable for being loaded and executed by a processor of a terminal device for the novel method for comprehensive configuration of voltage regulation resources in a power system distribution network.

[0052] Compared with the prior art, the present invention has the following beneficial effects:

[0053] (1) The present invention makes a comprehensive judgment based on the properties, over-limit amplitude, and power characteristics of the power generation and consumption equipment connected to each node in the distribution network, and proposes a classification standard for the over-limit amplitude and node attribute analysis of voltage over-limit nodes. The detailed topology and impedance data of the distribution network are not required, which improves the scientificity and applicability of the voltage over-limit problem analysis method disclosed in the present invention in the distribution network voltage over-limit analysis.

[0054] (2) The present invention analyzes the arrangement and capacity configuration criteria of voltage regulating reactors and voltage regulating capacitors based on the voltage over-limit problem, and performs configuration calculations according to the characteristics of load access and large-scale cable access in the distribution network in the new power system. This can achieve efficient configuration and capacity selection of reactive voltage regulating resources in the distribution network, overcome the shortcoming of being unable to provide detailed data under actual conditions, and achieve efficient configuration of reactive voltage regulating resources based only on the analysis results of the voltage over-limit problem.

[0055] (3) The present invention analyzes the layout and capacity configuration criteria of energy storage equipment based on the voltage over-limit problem, and performs configuration calculations according to the characteristics of distribution network load access and large-scale distributed photovoltaic access in the new power system, so as to achieve efficient configuration and capacity selection of active voltage regulation resources in the distribution network.

[0056] (4) The present invention conducts a comprehensive and quantifiable classification and analysis of the voltage over-limit problem in the distribution network of the new power system, and provides a method for arranging the voltage regulation resources and determining the allocation capacity for voltage regulation reactors, capacitors, and energy storage equipment, thereby realizing the comprehensive configuration of voltage regulation resources in the new power system, and further assisting in achieving safe and stable power supply operation of the distribution network.

[0057] (5) The present invention solves the problem of lack of comprehensive and quantifiable voltage regulation resource configuration method in the configuration of distribution network voltage regulation resources in new power systems. The voltage over-limit problem of distribution network nodes is common in new power systems, and reactive voltage regulation resources and active voltage regulation resources are increasing rapidly. The method proposed in the present invention has a wide range of applications and can be applied to the field of power systems to improve the safety and stability characteristics and high-quality power supply level of the distribution network in the power system.

[0058] Other features and advantages of additional aspects of the present invention will be given in part in the following description, and in part will become obvious from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 It is a flow chart of a new method for comprehensive configuration of voltage regulation resources in a power distribution network of an electric power system according to an embodiment of the present invention;

[0060] Figure 2Schematic diagram of classification standard of voltage-over-limit nodes during daytime in an embodiment of the present invention;

[0061] Figure 3 Schematic diagram of classification standard of voltage-over-limit nodes during night time in an embodiment of the present invention;

[0062] Figure 4 It is a schematic diagram of the variation trend of reactive voltage regulation allocation capacity of large-scale cable access nodes in an embodiment of the present invention;

[0063] Figure 5 The figure is a schematic diagram of the change trend of the active voltage regulation allocation capacity of the distributed photovoltaic access node in an embodiment of the present invention. DETAILED DESCRIPTION

[0064] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0065] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0066] Embodiment 1

[0067] In one or more embodiments, a novel method for comprehensive configuration of voltage regulation resources in a power distribution network is disclosed, combining Figure 1 , including:

[0068] S100: During the daytime and nighttime, the node attributes and over-limit amplitude of each voltage over-limit node in the distribution network are judged respectively.

[0069] In this embodiment, the operation status of the distribution network throughout the day is judged, and the voltage over-limit node over-limit amplitude and node attributes are obtained according to the distribution network node voltage and the power generation and consumption entities.

[0070] In the new power system, one of the main reasons for the voltage exceeding the upper limit during the daytime is the concentrated output of distributed photovoltaics; one of the main reasons for the voltage exceeding the upper limit during the nighttime is the advanced level of grid construction and the capacity increase effect caused by too many cable connections. The main reason for the voltage exceeding the upper limit during the daytime is the concentrated power consumption of industrial and commercial loads; the main reason for the voltage exceeding the lower limit during the nighttime is the large-scale access of residential loads.

[0071] S101: Using the daytime voltage over-limit node classification standard, determine the node attributes and over-limit amplitude of each voltage over-limit node in the distribution network.

[0072] Combination Figure 2 , the classification standards for voltage-limited nodes during daytime are as follows:

[0073] 1) First, classify the photovoltaic related voltage exceeding the upper limit node:

[0074]

[0075] Where: is the set of nodes where the photovoltaic access voltage exceeds the upper limit during the daytime; V k is the voltage amplitude of node k; V UL is the upper limit of node voltage; P k PV Connect PV power to node k; It is the set of adjacent nodes where the photovoltaic access voltage exceeds the upper limit during the daytime.

[0076] 2) Secondly, in the entire node set The middle nodes are excluded, and the remaining nodes are classified into nodes with load-related voltage exceeding the lower limit:

[0077]

[0078] Where: The voltage lower limit node set for the load power that exceeds the judgment limit during the daytime period; V LL is the lower limit of node voltage; P k LD is the load power of node k; Determine the limit value for load access; It is a set of nodes where the load power connected during the daytime does not exceed the judgment limit, but the voltage exceeds the lower limit.

[0079] The calculation method is:

[0080]

[0081] in, is the total load value of the distribution network in the current period, k SUM The total number of nodes in the distribution network.

[0082] During the daytime or nighttime, the voltage over-limit amplitude of the voltage over-limit node is calculated as follows:

[0083]

[0084] Where: V k,CLis the voltage over-limit amplitude of node k; V0 is the nominal voltage of the node.

[0085] S102: Using the voltage over-limit node classification standard during the night time period, determine the node attributes and over-limit amplitude of each voltage over-limit node in the distribution network.

[0086] Combination Figure 3 , the classification standards for voltage-limited nodes during nighttime are as follows:

[0087] 1) First, classify the nodes where the cable-related voltage exceeds the upper limit:

[0088]

[0089] in, The voltage upper limit node set is the node set whose cable reactance value exceeds the reactance value judgment limit during the night time period; The reactance value of node k is connected; It is the limit value for reactance judgment; The node set adjacent to the access voltage upper limit node whose access cable reactance value exceeds the reactance value judgment limit during night time;

[0090] The calculation method is:

[0091]

[0092] in, is the total reactance value of the distribution network, k SUM The total number of nodes in the distribution network.

[0093] 2) Secondly, in the entire node set The middle nodes are excluded, and the remaining nodes are classified into nodes with load-related voltage exceeding the lower limit:

[0094]

[0095] in, The voltage lower limit node set for the load power that exceeds the judgment limit during the night period; V LL is the lower limit of node voltage; P k LD is the load power of node k; Determine the limit value for load access; It is the set of nodes other than the nodes where the load power connected during the night period does not exceed the judgment limit and the voltage exceeds the lower limit.

[0096] S200: Based on the voltage over-limit node over-limit amplitude and node attributes, and according to the reactive voltage regulation equipment configuration criteria, the capacity of reactive voltage regulation equipment that can be added to each type of node in the distribution network is divided.

[0097] In this embodiment, the main reactive voltage regulation equipment resources in the distribution network are reactors and capacitors, wherein the reactors are mainly used to solve the problem of node voltage exceeding the upper limit, and the capacitors are mainly used to solve the problem of node voltage exceeding the lower limit.

[0098] At present, the line topology and line impedance data in the distribution station area are generally not available, so it is impossible to configure the capacity of the reactor and capacitor in the station area according to the power flow calculation modeling method in real applications. Therefore, this embodiment combines the voltage over-limit node over-limit amplitude and node attributes to divide the capacity of the reactive voltage regulation equipment. It overcomes the shortcoming of not being able to provide detailed data under real conditions, and can achieve efficient configuration of reactive voltage regulation resources based only on the analysis results of the voltage over-limit problem.

[0099] S201: Based on the voltage over-limit node over-limit amplitude and node attributes, and according to the reactor configuration criteria, the reactor capacity that can be added to each type of node in the distribution network is divided.

[0100] The reactor configuration guidelines are as follows:

[0101]

[0102] Among them, A k,Rt The reactor capacity configured for node k; A Rt The total capacity of the reactor to be configured in the system; It is the ratio coefficient of the reactor configuration for nodes whose cable reactance value exceeds the reactance value judgment limit. This coefficient can be set according to the configuration preference in the project and is a coefficient of 0 to 1. V k,CL is the voltage over-limit amplitude of node k, The voltage upper limit node set is the node set whose cable reactance value exceeds the reactance value judgment limit during the night time period; The node set adjacent to the access voltage upper limit node whose access cable reactance value exceeds the reactance value judgment limit during night time; It is the set of adjacent nodes where the photovoltaic access voltage exceeds the upper limit during the daytime.

[0103] Schematic diagram of the change trend of reactive voltage regulation allocation capacity of large-scale cable access nodes Figure 4 As shown, if this node is a node with large-scale cable access attributes, the greater the voltage limit of the node, the higher the capacity of the configured reactive voltage regulation resource.

[0104] S202: Based on the voltage over-limit node over-limit amplitude and node attributes, and according to capacitor configuration criteria, the newly added capacitor capacity of each type of node in the distribution network is divided.

[0105] The capacitor configuration guidelines are as follows:

[0106]

[0107] Among them, A k,Cp The capacitor capacity configured for node k; A Cp The total capacity of the reactor to be configured in the system; The capacitor configuration proportional coefficient for nodes connected to load power exceeding the judgment limit can be set based on the configuration preference in the project and is a coefficient of 0 to 1.

[0108] S300: Based on the capacity configuration plan of the reactive voltage regulation equipment, the node attributes and over-limit amplitude of each voltage over-limit node in the distribution network are updated and verified and calculated again.

[0109] In this embodiment, the method in S100 is used to reclassify the voltage over-limit nodes in the distribution network and calculate the over-limit amplitude to obtain the updated K′ D H,PV , K′ D L,LD , K′ N L,LD , K′ D L,NLD , K′ N L,NLD A collection of nodes, and the V k ' ,CL Exceeding limit.

[0110] S400: Based on the recalculated node attributes and over-limit amplitudes of each voltage over-limit node, according to the energy storage device configuration criteria, a configuration scheme of energy storage device resources is obtained to implement configuration of active voltage regulation resources; specifically:

[0111]

[0112] Among them, A k,ES The capacity of energy storage equipment configured for node k; A ES is the total capacity of energy storage equipment to be configured in the system; n H ,PV The proportional coefficient of the capacitor configuration for the photovoltaic access node can be set according to the configuration preference in the project, and is a coefficient of 0 to 1. The proportion of energy storage equipment configured for large-capacity load nodes; They are the node sets of photovoltaic access voltage exceeding the upper limit during the daytime period, the node sets of voltage exceeding the lower limit during the daytime period when the load power exceeds the judgment limit, the node sets of voltage exceeding the lower limit during the nighttime period when the load power exceeds the judgment limit, the node sets of voltage exceeding the lower limit during the daytime period when the load power does not exceed the judgment limit but the voltage exceeds the lower limit, and the node sets other than the node sets of voltage exceeding the lower limit during the nighttime period when the load power does not exceed the judgment limit.

[0113] Schematic diagram of the change trend of active voltage regulation allocation capacity of distributed photovoltaic access nodes Figure 5 As shown in the figure, if this node is a node with distributed photovoltaic access attributes, the greater the node voltage exceeds the limit, the higher the configured active voltage regulation resource capacity will be.

[0114] This embodiment uses a comprehensive and quantifiable classification and calculation method to analyze the voltage over-limit problem of the distribution network of the new power system, and screens and determines the access location and capacity of the voltage regulating reactor, capacitor, and energy storage equipment based on the comprehensive configuration method of the voltage regulating resources, so as to provide a decision-making basis for the layout and capacity allocation of the voltage regulating resources in the new power system.

[0115] Embodiment 2

[0116] In one or more embodiments, a novel power system distribution network voltage regulation resource comprehensive configuration system is disclosed, including:

[0117] The node attribute and over-limit amplitude judgment module is used to judge the node attribute and over-limit amplitude of each voltage over-limit node in the distribution network during the daytime and nighttime respectively;

[0118] The reactive voltage regulation equipment configuration module is used to divide the capacity of reactive voltage regulation equipment that can be added to each type of node in the distribution network according to the reactive voltage regulation equipment configuration criteria, combining the voltage over-limit node over-limit amplitude and node attributes;

[0119] The node attribute and over-limit amplitude secondary judgment module is used to re-judge the node attribute and over-limit amplitude of each voltage over-limit node in the distribution network based on the capacity configuration plan of the reactive voltage regulation equipment;

[0120] The energy storage device configuration module is used to obtain a configuration plan for energy storage device resources based on the recalculated node attributes and over-limit amplitudes of each voltage over-limit node and according to the energy storage device configuration criteria.

[0121] The specific implementation of the above modules is the same as that in Example 1 and will not be described in detail.

[0122] Embodiment 3

[0123] In one or more embodiments, a terminal device is disclosed, including a server, the server including a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the novel method for comprehensive configuration of voltage regulation resources in a power system distribution network in Embodiment 1 when executing the program. For the sake of brevity, it will not be described in detail here.

[0124] It should be understood that in this embodiment, the processor may be a central processing unit CPU, and the processor may also be other general-purpose processors, digital signal processors DSP, application-specific integrated circuits ASIC, off-the-shelf programmable gate arrays FPGA or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0125] The memory may include a read-only memory and a random access memory, and provide instructions and data to the processor. A portion of the memory may also include a non-volatile random access memory. For example, the memory may also store information about the device type.

[0126] In the implementation process, each step of the above method can be completed by an integrated logic circuit of hardware in a processor or an instruction in the form of software.

[0127] Embodiment 4

[0128] In one or more embodiments, a computer-readable storage medium is disclosed, in which a plurality of instructions are stored, wherein the instructions are suitable for being loaded by a processor of a terminal device and executing the novel method for comprehensive configuration of voltage regulation resources in a power system distribution network described in Example 1.

[0129] Although the above describes the specific implementation mode of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without creative work are still within the scope of protection of the present invention.

Claims

1. A novel method for comprehensive configuration of voltage regulation resources in a power distribution network, characterized in that: include: During the daytime and nighttime, the node attributes and over-limit amplitude of each voltage over-limit node in the distribution network are judged respectively; Combined with the voltage over-limit node over-limit amplitude and node attributes, according to the reactive voltage regulation equipment configuration criteria, the capacity of reactive voltage regulation equipment that can be added to each type of node in the distribution network is divided; Based on the capacity configuration plan of reactive voltage regulation equipment, the node attributes and over-limit amplitude of each voltage over-limit node in the distribution network are re-judged; Based on the recalculated node attributes and the voltage over-limit amplitude of each voltage over-limit node, and according to the energy storage device configuration criteria, a configuration scheme for energy storage device resources is obtained.

2. A novel method for comprehensive configuration of voltage regulation resources in a power distribution network according to claim 1, characterized in that: During the daytime, the node attributes of each voltage-over-limit node in the distribution network are determined, specifically: Classify the nodes where the photovoltaic related voltage exceeds the upper limit: in, is the set of nodes where the photovoltaic access voltage exceeds the upper limit during the daytime; V k is the voltage amplitude of node k; V UL is the upper limit of node voltage; Connect PV power to node k; It is the set of adjacent nodes where the photovoltaic access voltage exceeds the upper limit during the daytime; In the set of all nodes, and The nodes in the table are excluded; the remaining nodes are classified into the nodes where the load-related voltage exceeds the lower limit: in, The voltage lower limit node set for the load power that exceeds the judgment limit during the daytime period; V LL is the lower limit of node voltage; is the load power of node k; Determine the limit value for load access; It is a set of nodes where the load power connected during the daytime does not exceed the judgment limit, but the voltage exceeds the lower limit.

3. A novel method for comprehensive configuration of voltage regulation resources in a power distribution network according to claim 1, characterized in that: During the daytime or nighttime, the voltage over-limit amplitude of the voltage over-limit node is calculated as follows: Among them, V k,CL is the voltage over-limit amplitude of node k; V0 is the nominal voltage of the node.

4. A novel method for comprehensive configuration of voltage regulation resources in a power distribution network according to claim 1, characterized in that: During the night time, the node attributes of each voltage-limited node in the distribution network are determined, specifically: Classify the nodes where the cable-related voltage exceeds the upper limit: in, The voltage upper limit node set is the node set whose cable reactance value exceeds the reactance value judgment limit during the night time period; The reactance value of node k is connected; It is the limit value for reactance judgment; The node set adjacent to the access voltage upper limit node whose access cable reactance value exceeds the reactance value judgment limit during night time; In the set of all nodes, and The nodes in the table are excluded, and the remaining nodes are classified into load-related voltage exceeding the lower limit nodes: in, The voltage lower limit node set for the load power that exceeds the judgment limit during the night period; V LL is the lower limit of node voltage; is the load power of node k; Determine the limit value for load access; It is the set of nodes other than the nodes where the load power connected during the night period does not exceed the judgment limit and the voltage exceeds the lower limit.

5. A novel method for comprehensive configuration of voltage regulation resources in a power distribution network according to claim 1, characterized in that: Combined with the voltage over-limit node over-limit amplitude and node attributes, according to the reactive voltage regulation equipment configuration criteria, the capacity of reactive voltage regulation equipment that can be added to each type of node in the distribution network is divided, including: According to the reactor configuration criteria, the reactor capacity that can be added to each type of node in the distribution network is divided. The configuration criteria for the reactor capacity are: Among them, A k,Rt The reactor capacity configured for node k; A Rt The total capacity of the reactor to be configured in the system; Configure the proportional coefficient for the reactor of the node whose cable reactance value exceeds the reactance value judgment limit, V k,CL is the voltage over-limit amplitude of node k, The voltage upper limit node set is the node set whose cable reactance value exceeds the reactance value judgment limit during the night time period; The node set adjacent to the access voltage upper limit node whose access cable reactance value exceeds the reactance value judgment limit during night time; It is the set of adjacent nodes where the photovoltaic access voltage exceeds the upper limit during the daytime.

6. A novel method for comprehensive configuration of voltage regulation resources in a power distribution network according to claim 1, characterized in that: Combined with the voltage over-limit node over-limit amplitude and node attributes, according to the reactive voltage regulation equipment configuration criteria, the capacity of reactive voltage regulation equipment that can be added to each type of node in the distribution network is divided, including: According to the capacitor configuration criteria, the capacity of capacitors that can be added to each type of node in the distribution network is divided. The capacitor configuration criteria are: Among them, A k,Cp The capacitor capacity configured for node k; A Cp The total capacity of the reactor to be configured in the system; A proportional coefficient is configured for capacitors connected to nodes where the load power exceeds the judgment limit.

7. A novel method for comprehensive configuration of voltage regulation resources in a power distribution network according to claim 1, characterized in that: Based on the recalculated node attributes and over-limit amplitudes of each voltage over-limit node, and according to the energy storage device configuration criteria, the configuration scheme of the energy storage device resources is obtained, which is specifically: Among them, A kES The capacity of energy storage equipment configured for node k; A ES is the total capacity of energy storage equipment to be configured in the system; n H,PV Configure the proportionality factor for capacitors with photovoltaic access nodes; The proportion of energy storage equipment configured for large-capacity load nodes; The recalculated nodes are as follows: the set of nodes whose PV access voltage exceeds the upper limit during the daytime, the set of nodes whose voltage is below the lower limit during the daytime and whose load power exceeds the judgment limit, the set of nodes whose voltage is below the lower limit during the nighttime and whose load power exceeds the judgment limit, the set of nodes whose load power does not exceed the judgment limit but whose voltage is below the lower limit during the daytime, and the set of nodes other than the nodes whose load power does not exceed the judgment limit and whose voltage is above the lower limit during the nighttime.

8. A new type of comprehensive configuration system for voltage regulation resources of power distribution network, characterized in that: include: The node attribute and over-limit amplitude judgment module is used to judge the node attribute and over-limit amplitude of each voltage over-limit node in the distribution network during the daytime and nighttime respectively; The reactive voltage regulation equipment configuration module is used to divide the capacity of reactive voltage regulation equipment that can be added to each type of node in the distribution network according to the reactive voltage regulation equipment configuration criteria, combining the voltage over-limit node over-limit amplitude and node attributes; The node attribute and over-limit amplitude secondary judgment module is used to re-judge the node attribute and over-limit amplitude of each voltage over-limit node in the distribution network based on the capacity configuration plan of the reactive voltage regulation equipment; The energy storage device configuration module is used to obtain a configuration plan for energy storage device resources based on the recalculated node attributes and over-limit amplitudes of each voltage over-limit node and according to the energy storage device configuration criteria.

9. A terminal device, comprising a processor and a memory, wherein the processor is used to implement instructions; and the memory is used to store multiple instructions, characterized in that: The instructions are suitable for being loaded by a processor and executing the new method for comprehensive configuration of voltage regulation resources in a power system distribution network as described in any one of claims 1-7.

10. A computer-readable storage medium storing a plurality of instructions, characterized in that: The instructions are suitable for being loaded by a processor of a terminal device and executing the new method for comprehensive configuration of voltage regulation resources in a power system distribution network as described in any one of claims 1-7.

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