A kind of medium voltage distribution network low-voltage problem analysis method and device
阅读说明：本技术 一种中压配电网低电压问题分析方法及装置 (A kind of medium voltage distribution network low-voltage problem analysis method and device ) 是由 杨金东 王科 刘红文 聂鼎 黄明 于 2019-08-21 设计创作，主要内容包括：本申请公开了一种中压配电网低电压问题分析方法及装置,获取10kV配网馈线各台区的负荷数据、馈线技术参数、供电半径数据和变电站10kV线路出口断路器负荷数据；利用各台区的负荷数据、馈线技术参数和供电半径数据进行前推回代法的潮流分析计算,获得参考数据表；根据参考数据表自动查找与馈线技术参数和供电半径数据对应的筛选结果；根据筛选结果,分析并输出配网低电压问题的原因数据。本申请的技术方案可以建立参考数据表,并根据参考数据表对配网电压问题进行快速定位和诊断,给出精准的低电压治理技改项目建议,并能支撑偏远地区中压配电网差异化规划建设,节省建设成本。(This application discloses a kind of medium voltage distribution network low-voltage problem analysis method and devices, obtain load data, feeder line technical parameter, radius of electricity supply data and the substation 10kV line outlet breaker load data in each area of 10kV distribution network feeder；It is calculated using the tidal current analysis that the load data in each area, feeder line technical parameter and radius of electricity supply data carry out forward-backward sweep method, obtains reference data table；Search the selection result corresponding with feeder line technical parameter and radius of electricity supply data automatically according to reference data table；According to the selection result, the reason of analyzing and exporting distribution low-voltage problem data.The technical solution of the application can establish reference data table, and distribution voltage problem is quickly positioned and diagnosed according to reference data table, it provides accurately low-voltage and administers technological transformation project suggestion, and medium voltage distribution network differentiation planning construction from far-off regions can be supported, save construction cost.)
1. a kind of medium voltage distribution network low-voltage problem analysis method characterized by comprising
Obtain load data, feeder line technical parameter, radius of electricity supply data and substation's 10kV line in each area of 10kV distribution network feeder Way outlet breaker load data；
The tidal current analysis meter of forward-backward sweep method is carried out using the load data in each area, feeder line technical parameter and radius of electricity supply data It calculates, obtains reference data table, the feeder line technical parameter includes feeder line cross-sectional area and feeder line material, and the reference data table is Different load, different feeder line technical parameters node voltage tables of data corresponding with different radius of electricity supplys；
Search screening corresponding with the feeder line technical parameter and the radius of electricity supply data automatically according to the reference data table As a result；
According to the selection result, the reason of analyzing and exporting distribution low-voltage problem data.
2. the method according to claim 1, wherein being searched automatically according to the reference data table and the feeder line The step of technical parameter and the radius of electricity supply data corresponding the selection result includes:
Search the first number identical with the feeder line cross-sectional area in the feeder line technical parameter automatically in the reference data table According to first data include feeder line cross-sectional area data and its corresponding node voltage data；
Search the second data identical with the feeder line material in the feeder line technical parameter automatically in first data, it is described Second data include feeder line material quality data and its corresponding node voltage data；
Search third data identical with the radius of electricity supply data automatically in second data, the third data are The selection result, and, the third data include radius of electricity supply data and its corresponding node voltage data.
3. the method according to claim 1, wherein each area load data and resident load data from It is obtained in metering automation system；
Substation 10kV line outlet breaker load data is obtained from SCADA dispatching system；
Wherein, the load data in platform area is added up by the load data of user each in metering system and is checked, the number of rejecting abnormalities According to calculation and check formula is as follows:
Assuming that there is n user in certain area, then certain sampling instant, platform area total load is calculated by following formula expression:
In formula, Lnt indicates the total load in this of t moment area, SjIndicate the daily line loss in this area, SjFrom marketing management system It obtains；
Δ σ=| Lnt-At |≤m,
In formula, Δ σ indicates to calculate the area Suo Tai load and measurement gained platform area load deviation, and m requires institute really by computational accuracy It is fixed.
4. the method according to claim 1, wherein the feeder line technical parameter in each area is from production management system It is obtained in system, medium pressure power distribution network topological structure and radius of electricity supply are obtained from GIS-Geographic Information System.
5. a kind of medium voltage distribution network low-voltage case study device characterized by comprising
Data acquisition module, for obtaining the load data, feeder line technical parameter, radius of electricity supply number in each area of 10kV distribution network feeder According to substation 10kV line outlet breaker load data；
Data computation module is calculated for being calculated according to the data of acquisition using the tidal current analysis of forward-backward sweep method As a result and reference data table is obtained, the feeder line technical parameter includes feeder line cross-sectional area and feeder line material, the reference data Table is different load, different feeder line technical parameters node voltage tables of data corresponding with different radius of electricity supplys；
Data screening module, for being searched automatically according to the reference data table and the feeder line technical parameter and the power supply half The corresponding the selection result of diameter data；
As a result output module, for analyzing and exporting the abnormal cause data of distribution low-voltage problem according to the selection result.
6. device according to claim 5, which is characterized in that the data screening module is also used to: in the reference number According to identical with the feeder line cross-sectional area in the feeder line technical parameter the first data, first data packet are searched in table automatically Include feeder line cross-sectional area data and its corresponding node voltage data；It is searched and the feeder line skill automatically in first data Identical second data of feeder line material in art parameter, second data include feeder line material quality data and its corresponding node electricity Press data；Search third data identical with the radius of electricity supply data, the third data automatically in second data As the selection result, and, the third data include radius of electricity supply data and its corresponding node voltage data.
Technical field
This application involves technical field of power systems more particularly to a kind of medium voltage distribution network low-voltage problem analysis method and Device.
Background technique
It is usually needed for the distribution low-voltage problem due to caused by feeder line cross-sectional area, feeder line material, radius of electricity supply at present It collects by repeatedly calculating after mass data, referring again to Guidelines or technical standard could finally determine by feeder line cross section Product, feeder line material, radius of electricity supply cause low-voltage problem.Such processing mode much time force efficiency is low.Therefore, how to matching Net low-voltage problem is quickly screened, and those skilled in the art's urgent problem to be solved is become.
Summary of the invention
This application provides a kind of medium voltage distribution network low-voltage problem analysis method and devices, can ask distribution low-voltage Topic is quickly screened.
In a first aspect, this application provides a kind of medium voltage distribution network low-voltage problem analysis methods, comprising:
Obtain the load data, feeder line technical parameter and radius of electricity supply data, substation in each area of 10kV distribution network feeder 10kV line outlet breaker load data；
The trend point of forward-backward sweep method is carried out using the load data in each area, feeder line technical parameter and radius of electricity supply data Analysis calculates, and obtains reference data table, the feeder line technical parameter includes feeder line cross-sectional area and feeder line material, the reference data Table is different load, different feeder line technical parameters node voltage tables of data corresponding with different radius of electricity supplys；
It is searched automatically according to the reference data table corresponding with the feeder line technical parameter and the radius of electricity supply data The selection result；
According to the selection result, the reason of analyzing and exporting distribution low-voltage problem data.
With reference to first aspect, in a kind of achievable mode of the embodiment of the present application,
It is searched automatically according to the reference data table corresponding with the feeder line technical parameter and the radius of electricity supply data The step of the selection result includes:
Search identical with the feeder line cross-sectional area in the feeder line technical parameter the automatically in the reference data table One data, first data include feeder line cross-sectional area data and its corresponding node voltage data；
Search the second data identical with the feeder line material in the feeder line technical parameter automatically in first data, Second data include feeder line material quality data and its corresponding node voltage data；
Search third data identical with the radius of electricity supply data, the third data automatically in second data As the selection result, and, the third data include radius of electricity supply data and its corresponding node voltage data.
With reference to first aspect, in a kind of achievable mode of the embodiment of the present application, the load data in each area and Resident load data are obtained from metering automation system；
Substation 10kV line outlet breaker load data is obtained from SCADA dispatching system；
Wherein, the load data in platform area is added up by the load data of user each in metering system and is checked, rejecting abnormalities Data, calculation and check formula is as follows:
Assuming that there is n user in certain area, then certain sampling instant, platform area total load is calculated by following formula expression:
In formula, Lnt indicates the total load in this of t moment area, SjIndicate the daily line loss in this area, SjFrom marketing management System obtains；
Δ σ=| Lnt-At |≤m,
In formula, Δ σ indicates to calculate the area Suo Tai load and measurement gained platform area load deviation, and m is required by computational accuracy It determines.
With reference to first aspect, in a kind of achievable mode of the embodiment of the present application, the feeder line technology in each area is joined Several and radius of electricity supply is obtained from production management system, and medium pressure power distribution network topological structure and radius of electricity supply are from geography information system It is obtained in system.
Second aspect, this application provides a kind of medium voltage distribution network low-voltage case study devices, comprising:
Data acquisition module, for obtaining the load data, feeder line technical parameter, power supply half in each area of 10kV distribution network feeder Diameter data and substation 10kV line outlet breaker load data；
Data computation module is obtained for being calculated according to the data of acquisition using the tidal current analysis of forward-backward sweep method Calculated result simultaneously obtains reference data table, and the feeder line technical parameter includes feeder line cross-sectional area and feeder line material, the reference Tables of data is different load, different feeder line technical parameters node voltage tables of data corresponding with different radius of electricity supplys；
Data screening module, for being searched automatically according to the reference data table and the feeder line technical parameter and the confession The corresponding the selection result of electric radius data；
As a result output module, for analyzing and exporting the abnormal cause of distribution low-voltage problem according to the selection result Data.
In conjunction with second aspect, in a kind of achievable mode of the embodiment of the present application, the data screening module is also used to: Search the first data identical with the feeder line cross-sectional area in the feeder line technical parameter, institute automatically in the reference data table Stating the first data includes feeder line cross-sectional area data and its corresponding node voltage data；It is searched automatically in first data The second data identical with the feeder line material in the feeder line technical parameter, second data include feeder line material quality data and its Corresponding node voltage data；Search third data identical with the radius of electricity supply data automatically in second data, The third data are the selection result, and, the third data include radius of electricity supply data and its corresponding node voltage Data.
From the above technical scheme, this application provides a kind of medium voltage distribution network low-voltage problem analysis method and dresses It sets, obtains load data, feeder line technical parameter, radius of electricity supply data and substation's 10kV route in each area of 10kV distribution network feeder Outlet breaker load data；It is pushed back before being carried out using the load data in each area, feeder line technical parameter and radius of electricity supply data It is calculated for the tidal current analysis of method, obtains reference data table；It is searched automatically according to reference data table and feeder line technical parameter and power supply The corresponding the selection result of radius data；According to the selection result, the reason of analyzing and exporting distribution low-voltage problem data.The application Technical solution can establish reference data table, and distribution voltage problem is quickly positioned and is examined according to reference data table It is disconnected, it provides accurately low-voltage and administers technological transformation project suggestion, and Distribution network differentiation planning from far-off regions can be supported to build If saving construction cost.
Detailed description of the invention
In order to illustrate more clearly of the technical solution of the application, attached drawing needed in case study on implementation will be made below Simply introduce, it should be apparent that, for those of ordinary skills, in the premise of not making the creative labor property Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of flow chart of medium voltage distribution network low-voltage problem analysis method provided by the embodiments of the present application；
Fig. 2 provides a simple feeder line line segment schematic diagram for the embodiment of the present application；
Fig. 3 is the schematic diagram of a kind of area provided by the embodiments of the present application power load distributing model；
Fig. 4 is the schematic diagram of second area provided by the embodiments of the present application power load distributing model；
Fig. 5 is the schematic diagram of the third area's power load distributing model provided by the embodiments of the present application；
Fig. 6 is a kind of structural block diagram of medium voltage distribution network low-voltage case study device provided by the embodiments of the present application.
Specific embodiment
In order to make those skilled in the art better understand the technical solutions in the application, below in conjunction with attached drawing, it is right Technical solution in the embodiment of the present application is clearly and completely described.
Fig. 1 is a kind of flow chart of medium voltage distribution network low-voltage problem analysis method provided by the embodiments of the present application.Such as Fig. 1 It is shown, this method comprises:
S101 obtains load data, feeder line technical parameter, radius of electricity supply data and the power transformation in each area of 10kV distribution network feeder It stands 10kV line outlet breaker load data.
Optionally, the load data in each area and resident load data are obtained from metering automation system, load Data include platform area number, platform area title, platform area load data etc., substation 10kV line outlet breaker load data from It is obtained in SCADA dispatching system；
Wherein, the load data in platform area is added up by the load data of user each in metering system and is checked, rejecting abnormalities Data, calculation and check formula is as follows:
Assuming that there is n user in certain area, then certain sampling instant, platform area total load is calculated by following formula expression:
In formula, Lnt indicates the total load in this of t moment area, SjIndicate the daily line loss in this area, SjFrom marketing management System obtains；
Δ σ=| Lnt-At |≤m,
In formula, Δ σ indicates to calculate the area Suo Tai load and measurement gained platform area load deviation, and m is required by computational accuracy It determines.
Optionally, the feeder line technical parameter in each area and radius of electricity supply are obtained from production management system, it is described in Press-fitting topological structure of electric and radius of electricity supply are obtained from GIS-Geographic Information System.
S102 carries out forward-backward sweep method using the load data in each area, feeder line technical parameter and radius of electricity supply data Tidal current analysis calculates, and obtains reference data table, the feeder line technical parameter includes feeder line cross-sectional area and feeder line material, the ginseng Examining tables of data is different load, different feeder line technical parameters node voltage tables of data corresponding with different radius of electricity supplys.In addition, feedback Line technology parameter further includes feeder line model.
S103 is searched and the feeder line technical parameter and the radius of electricity supply data pair automatically according to the reference data table The selection result answered.
S104, according to the selection result, the reason of analyzing and exporting distribution low-voltage problem data.
Forward-backward sweep method in the embodiment of the present application is a kind of power flow algorithm of combination distribution feature, simple with programming, The advantages that better numerical value stability, high computational efficiency.Being pushed forward back substitution tidal current computing method has several forms, what difference was embodied in Method is using branch current and node voltage as iteration amount, and some is using branch power and node voltage as iteration amount.
For a branch, the node for flowing into electric current is father node；Flowing out electric current is child node.Two pass through certain The connected adjacent legs of node, along the direction of electric current flowing, upstream branch is father's branch；Downstream leg is sub- branch.
Fig. 2 provides a simple feeder line line segment schematic diagram for the embodiment of the present application.By taking the feeder line line segment in Fig. 2 as an example, Use Pi、Pj、Qi、QjIndicate branch i, the head end power of j, PLj、QLjIndicate the burden with power and load or burden without work of node j, LPjAnd LQj Respectively branch bjUpper active and reactive power loss.The active power and reactive power of node i+1 are as follows:
Wherein,
Formula (1) (2) constitutes the fundamental equation for being pushed forward back substitution.
Match in electronic network radial, for branch bjHave formula as follows:
If branch bjEnd-node vjFor tip load bus, then the electric current of the nodeEqual to flowing through tip load section The electric current of point, namely the load current equal to the tip load busThat is,
Node vjLoad currentIt may be expressed as:
In formula, PL,j-jQL,jFor node vjThe conjugation of load power；For node vjThe conjugation of voltage.If branch bj's End-node vjIt is not tip load bus, then branch currentIt should be branch end-node vjThe electricity of electric current and its all sub- branch The sum of road, that is,
In formula, d is with node vjFor the set of the branch of father node.
According to formula (1) to formula (6), the electric current of each branch can be obtained by from tip load bus to power supply node recursion, Then being pushed back according to formula from power supply node to tip load bus can be in the hope of each node voltage.
After having obtained whole node voltages by the solution of equation, so that it may further calculate the power of all kinds of nodes with And in network power distribution.
The problem of platform area power load distributing model further studies line voltage distribution will be also established in the embodiment of the present application.Model choosing In taking, the route for not needing research is merged into head end load, is defined as S1；Load on the route to be studied is defined as S2.S2 is uniformly distributed by load or equal difference distribution is handled, as shown in Fig. 3, Fig. 4 and Fig. 5.
It is 3 and 1/3 by the ratio of first node and tail node in remaining node S2 when carrying out load equal difference distribution process Both of these case is incremented by the Typical Representative to successively decrease with load as load and is handled.
Do not consider conductance over the ground in calculating and susceptance, transformer are equivalent to concatenated resistance and reactance over the ground, specific number Value is acquired by given transformer parameter.Simultaneously for convenient for calculating, make the following assumptions: head end voltage is symmetrical；Three-phase load is symmetrical； Mutual inductance between route and over the ground susceptance are not considered；Influence of the climatic factors such as temperature, humidity to line impedance is not considered.
Optionally, it is searched automatically according to the reference data table and the feeder line technical parameter and the radius of electricity supply data The step of corresponding the selection result includes:
S201 is searched identical as the feeder line cross-sectional area in the feeder line technical parameter automatically in the reference data table The first data, first data include feeder line cross-sectional area data and its corresponding node voltage data；
S202 is searched and the feeder line material identical second in the feeder line technical parameter automatically in first data Data, second data include feeder line material quality data and its corresponding node voltage data；
S203, searches identical with radius of electricity supply data third data automatically in second data, and described the Three data are the selection result, and, the third data include radius of electricity supply data and its corresponding node voltage data.
Fig. 6 is a kind of structural block diagram of medium voltage distribution network low-voltage case study device provided by the embodiments of the present application.Such as Shown in Fig. 6, which includes:
Data acquisition module 61, for obtaining the load data, feeder line technical parameter, power supply in each area of 10kV distribution network feeder Radius data and substation 10kV line outlet breaker load data；
Data computation module 62 is obtained for being calculated according to the data of acquisition using the tidal current analysis of forward-backward sweep method To calculated result and reference data table is obtained, the feeder line technical parameter includes feeder line cross-sectional area and feeder line material, the ginseng Examining tables of data is different load, different feeder line technical parameters node voltage tables of data corresponding with different radius of electricity supplys；
Data screening module 63, for being searched automatically according to the reference data table and the feeder line technical parameter and described The corresponding the selection result of radius of electricity supply data；
As a result output module 64, for analyzing and the exception for exporting distribution low-voltage problem being former according to the selection result Because of data.
Optionally, the data screening module is also used to: being searched and the feeder line skill automatically in the reference data table Identical first data of feeder line cross-sectional area in art parameter, first data include feeder line cross-sectional area data and its correspondence Node voltage data；Search identical with the feeder line material in the feeder line technical parameter the automatically in first data Two data, second data include feeder line material quality data and its corresponding node voltage data；In second data certainly Dynamic to search third data identical with the radius of electricity supply data, the third data are the selection result, and, the third Data include radius of electricity supply data and its corresponding node voltage data.
From the above technical scheme, this application provides a kind of medium voltage distribution network low-voltage problem analysis method and dresses It sets, obtains load data, feeder line technical parameter, radius of electricity supply data and substation's 10kV route in each area of 10kV distribution network feeder Outlet breaker load data；It is pushed back before being carried out using the load data in each area, feeder line technical parameter and radius of electricity supply data It is calculated for the tidal current analysis of method, obtains reference data table；It is searched automatically according to reference data table and feeder line technical parameter and power supply The corresponding the selection result of radius data；According to the selection result, the reason of analyzing and exporting distribution low-voltage problem data.The application Technical solution can establish reference data table, and distribution voltage problem is quickly positioned and is examined according to reference data table It is disconnected, it provides accurately low-voltage and administers technological transformation project suggestion, and Distribution network differentiation planning from far-off regions can be supported to build If saving construction cost.
Those skilled in the art will readily occur to its of the application after considering specification and practicing application disclosed herein Its embodiment.This application is intended to cover any variations, uses, or adaptations of the application, these modifications, purposes or Person's adaptive change follows the general principle of the application and including the undocumented common knowledge in the art of the application Or conventional techniques.The description and examples are only to be considered as illustrative, and the true scope and spirit of the application are by following Claim is pointed out.
It should be understood that the application is not limited to the precise structure that has been described above and shown in the drawings, and And various modifications and changes may be made without departing from the scope thereof.Scope of the present application is only limited by the accompanying claims.