CN110610297A - Medium-voltage distribution network grid planning method - Google Patents
Medium-voltage distribution network grid planning method Download PDFInfo
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Abstract
The invention relates to the technical field of a power distribution network, in particular to a medium-voltage distribution network grid planning method, which forms a standard work flow of the medium-voltage distribution network grid planning method, so that planning work is reproducible, and work results are stable and traceable. The method is suitable for scientifically, quickly and effectively finishing the grid planning work of the medium-voltage distribution network in a complex area by a power supply enterprise, and meanwhile, the systematicness, the practicability and the operability of the grid planning work are improved, so that the method is suitable for quickly supplementing the short plates during the planning of the medium-voltage distribution network and effectively improving the working quality.
Description
Technical Field
The invention relates to the technical field of a press-fit power grid, in particular to a medium-voltage power distribution network grid planning method.
Background
The medium voltage distribution network grid planning is a medium voltage distribution network planning method which divides a medium voltage distribution network power supply area into a plurality of independent grids, and plans a plurality of groups of independent medium voltage feeder groups for supplying power for each grid so as to improve the power supply capacity of each grid and solve the problem of current situation relatively independently. In the past, a unified method is not available for medium-voltage distribution network grid planning, so-called steps are only planning outlines, and the working sequence of 'power grid current situation and problem analysis, load prediction development and target grid structure scheme planning' is provided, but how to do the actual scheme planning does not have a standard flow. The process of developing the grid planning of the medium-voltage distribution network is mostly based on personal experience or temporary originality, no fixed and systematic working method exists, related working programs do not have reproducibility, and related working results are unstable and cannot be traced. Meanwhile, the discussion and solidification of the original medium-voltage distribution network grid planning scheme are mainly based on a project compiling table and a CAD electrical wiring diagram drawing, and a simple and classified method for clearly displaying the current situation of a grid line and planning the conversion process of a target network frame by utilizing a geographical edge layout does not exist.
Disclosure of Invention
The invention provides a medium-voltage distribution network grid planning method for overcoming at least one defect in the prior art, and the planning method is used for realizing the systematic planning work flow and enabling the planning work to be more systematic.
In order to solve the technical problems, the invention adopts the technical scheme that: a medium voltage distribution network grid planning method comprises the following steps:
s1: collecting the current situation information and data of the distribution network, realizing the establishment of a dual-power-supply station account of a user and the arrangement of a current-situation feeder group station account, and then drawing a main contact diagram of the current-situation feeder group;
s2: collecting the current situation geographic information of the distribution network, and realizing the arrangement of a current situation geographic information base of the distribution network and the arrangement of a main contact geographic information base of a current situation feeder group;
s3: collecting the current situation and planning information of the high-voltage distribution network: drawing the current situation of the high-voltage distribution network and the current situation of the substation in the planning information collection into an electronic map, marking the substations with different voltage grades, and displaying the planned production life of the substations;
marking a power supply range outline of the current transformer substation in the electronic map, and drawing a power supply range of the current transformer substation in the electronic map according to the power supply range outline;
s4: after the step S1, the step S2 and the step S3 are completed, determining a power supply direction and a primary power supply range scheme of the transformer substation: according to the planning result of the high-voltage distribution network, determining a power supply direction and a primary power supply range scheme of a transformer substation, selecting a planning feeder group scheme and planning the feeder group according to the primary power supply range scheme, and stacking the power supply range of each transformer substation according to the main power supply range of each circuit determined by planning the planning feeder group;
s5: determining a preliminary grid division scheme and a planned feeder group scheme: according to the step S4, obtaining a preliminary grid division scheme and a planned feeder group scheme, and solidifying grid boundaries and trunks of the preliminary grid division scheme and the planned feeder group scheme in the electronic map along the distribution path;
s6: programming a planning feeder group in the grid: determining a grid division scheme, planning a feeder group primary network frame planning and a year-by-year conversion process by combining a distribution network current situation to a planning electrical conversion red-black picture, a distribution network planning geographical edge distribution information base and a text table net of information before and after feeder group transformation;
s7: planning feeder group load prediction verification and transformer substation load prediction verification: calculating the load demand condition of the medium voltage distribution network grid ten years later by using a load density index method by taking a planning feeder group as a unit, and verifying whether the planning feeder group meets the requirements of unlimited power supply and rotatable power supply; meanwhile, stacking the load demand condition of each transformer substation ten years later according to the load of each main power supply of the medium-voltage distribution network grid, and performing high-voltage distribution network planning to check the planning result of the high-voltage distribution network, wherein if the high-voltage distribution network is checked to be passed, the following steps are continued, and if the high-voltage distribution network is not checked to be passed, the step S5 is returned to for adjustment;
s8: and (3) carrying out optical cable coverage planning compilation based on the target net rack and the primary and secondary layers: according to a distribution network planning geographical distribution information base, planning primary and secondary layered optical cable target net racks firstly to obtain annual optical cable construction planning;
s9: and checking the planning method.
In one embodiment, in step S4, the planning of feeder group scheme selection includes network connection selection, main/standby supply line selection, and demonstration of whole line cutover.
In one embodiment, in step S6, the red-black diagram of the distribution network current status to planned electrical transition refers to a diagram of a transition process of electrical wiring diagram from the current status to the target network rack, which is drawn by taking the planned feeder group as a unit.
Preferably, in step S6, the distribution network planning geographical distribution information base is an information collection of the preliminary grid division scheme boundary geographical information and the planning feeder group scheme primary rack geographical information stored on the electronic map.
Preferably, in step S6, the text ledger of information before and after feeder group modification refers to a text ledger for recording the wiring manner and related lines before and after feeder group modification.
In one embodiment, step S6 includes the following steps:
s61: displaying the current geographical information of the grid boundary and all distribution networks, screening and primarily meshing the lines passing through the grid area in the scheme, integrating the trunk contact diagrams of the current feeder groups associated with the lines passing through the grid area, and supplementing the equipment information on the main branches;
s62: comparing the information of the main distribution path of the planned feeder group scheme with the geographical information of the preliminary grid division scheme and the planned feeder group scheme, adjusting the preliminary grid division scheme and the planned feeder group scheme, drawing the current situation of the preliminary distribution network to a planned electrical transition red-black image, and synchronously modifying the preliminary grid division scheme and the planned feeder group scheme;
s63: checking treatment subsection unbalance by combining the current situation of the primary distribution network to a planned electrical transformation red-black graph, and matching automatic nodes;
s64: determining a red-black image of the current situation of the distribution network to the planned electrical transition, and storing the boundary geographic information of the preliminary grid division scheme and the primary network frame geographic information of the planned feeder group scheme as a distribution network planned geographic edge distribution information base in an electronic map according to the red-black image of the current situation of the distribution network to the planned electrical transition;
s65: drawing a total wiring diagram, comparing the current situation of a distribution network with a red-black diagram for the conversion from planning electrical to planning electrical, supplementing target net rack information corresponding to the grids of each planning feeder group, and compiling into a text table net of information before and after the transformation of the planning feeder group in the middle area;
s66: drawing a power supply range diagram of the target grid substation, and drawing a target grid block area and grid division diagram.
In one embodiment, step S9 includes the following steps:
s91: extracting all the geographical information of the automatic function nodes of the primary target network frame to form an optical cable service terminal demand geographical information base, and extracting the geographical information of a target network frame line path and a current distribution network communication optical cable path;
s92: the path of the optical cable in the target grid line path, which is led out from the transformer substation and looped back to the transformer substation, is a main channel, and each main channel is connected with a service terminal in series and is independent of each other;
planning the optical cable path by comparing the path of the primary target net rack with the path of the medium-voltage line;
s93: after the main channel covers the area, the wire is led out from the main channel and looped back to the main channel, the local area of the terminal which is not accessed is supplemented through planning a secondary channel, the secondary channel is the wire led out from the main channel and looped back to the path of the main channel;
s94: t contact terminating: the T-joint of the secondary channel and the main channel and the T-joint extending from the secondary channel are arranged in a switch station or a newly-built ring main box which can be used for building end equipment;
s95: forming a preliminary optical cable construction scale geographic information base, and solidifying geographic information of each service terminal which is connected into the transformer substation in a looped mode by taking a planning feeder group as a unit to form an optical cable terminal access geographic information base;
s96: and forming a fixed-draft optical cable construction scale geographic information base, and synchronously describing the access topological relation on a primary target grid map when the optical cable terminal is accessed into the geographic information base.
Compared with the prior art, the invention has the following characteristics:
1. the standard work flow of the medium-voltage distribution network grid planning method is formed, so that the planning work is reproducible, and the work result is stable and traceable. The method is suitable for scientifically, quickly and effectively finishing the grid planning work of the medium-voltage distribution network in a complex area by a power supply enterprise, and meanwhile, the systematicness, the practicability and the operability of the grid planning work are improved, so that the method is suitable for quickly supplementing the short plates during planning of the medium-voltage distribution network and effectively improving the working quality;
2. the planning work flow of the system is realized, so that the planning work is more systematic, the obtained planning scheme is more reasonable and perfect, and the situations of bugs and mutual conflicts are reduced;
3. in the technical scheme, the visual electronic map is matched with the GIS system derived data, so that the planning work process and the result are more visual and concrete, clear and visual discussion foundation is developed, and the discussion efficiency and the accuracy are improved; the whole planning work is more visual, and the actual limitation factors of the terrain can be more combined and considered, so that the obtained planning scheme is more feasible, reasonable and accurate;
4. the optical cable coverage planning and compiling method based on the target net rack and the primary and secondary layers improves the depth, systematicness, real operability and methodicity of the optical cable planning of the power distribution network. The certainty of optical cable planning is improved, optical cable repeated construction is reduced, investment and channel resources are saved, a standard working flow is formed, and further solidification in planning information auxiliary system application is facilitated.
Drawings
FIG. 1 is a schematic flow chart of a method in an embodiment of the present invention.
Detailed Description
The drawings are for illustration purposes only and are not to be construed as limiting the invention; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the invention.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms may be understood by those skilled in the art according to specific circumstances.
Example (b):
as shown in fig. 1, a method for planning a grid of a medium voltage distribution network includes the following steps:
a medium voltage distribution network grid planning method comprises the following steps:
s1: and collecting the current situation information and data of the distribution network, compiling a dual-power-supply station account of a user and arranging the station account of the current feeder group, and then drawing a main contact diagram of the current feeder group.
S2: and collecting the current situation geographic information of the distribution network, and realizing the arrangement of a current situation geographic information base of the distribution network and the arrangement of a main contact geographic information base of a current situation feeder group.
S3: collecting the current situation and planning information of the high-voltage distribution network: and drawing the current situation of the high-voltage distribution network and the current situation of the transformer substation in the planning information collection into an electronic map, marking the transformer substations with different voltage grades, and displaying the planned production life of the transformer substations.
And marking the power supply range outline of the current transformer substation in the electronic map, and drawing the power supply range of the current transformer substation in the electronic map according to the power supply range outline.
S4: after the step S1, the step S2 and the step S3 are completed, determining a power supply direction and a primary power supply range scheme of the transformer substation: and determining the power supply direction and the primary power supply range scheme of the transformer substation according to the planning result of the high-voltage power distribution network, selecting the planning feeder group scheme and planning the feeder group according to the primary power supply range scheme, and stacking the power supply range of each transformer substation according to the main power supply range of each circuit determined by planning the planning feeder group.
The planning feeder group scheme selection comprises networking line selection, main and standby supply line selection and whole line cutting demonstration.
S5: determining a preliminary grid division scheme and a planned feeder group scheme: according to the step S4, a preliminary mesh partition scheme and a planned feeder group scheme are obtained, and the mesh boundaries and trunks of the preliminary mesh partition scheme and the planned feeder group scheme are solidified in the electronic map along the cloth path.
S6: programming a planning feeder group in the grid: and determining a grid division scheme, planning a primary network frame planning and a year-by-year conversion process of the feeder group by combining the current situation of the distribution network to a planning electrical conversion red-black picture, a distribution network planning geographical edge distribution information base and a text table book of information before and after feeder group transformation.
The red-black diagram for the current situation of the distribution network to be converted into the planned electrical diagram refers to a diagram for drawing the conversion process of the electrical wiring diagram from the current situation to the target network frame in a step-by-step manner by taking the planned feeder group as a unit.
The distribution network planning geographical distribution information base is an information collection of boundary geographical information of a preliminary grid division scheme and geographical information of a primary network frame of a planning feeder group scheme stored on an electronic map.
The text account of the information before and after the feeder line group is modified refers to a text account which records the wiring mode before and after the feeder line group is modified and relates to the line.
Step S6 includes the following steps:
s61: displaying the current geographical information of the grid boundary and all distribution networks, screening and primarily meshing the lines passing through the grid area in the scheme, integrating the trunk contact diagrams of the current feeder groups associated with the lines passing through the grid area, and supplementing the equipment information on the main branches.
S62: comparing the information of the trunk edge distribution path of the planned feeder group scheme with the geographic information of the preliminary grid division scheme and the planned feeder group scheme, adjusting the preliminary grid division scheme and the planned feeder group scheme, drawing a red-black image from the current situation of the preliminary distribution network to planned electrical transition, and synchronously modifying the preliminary grid division scheme and the planned feeder group scheme.
S63: and (4) checking treatment subsection unbalance by combining the current situation of the primary distribution network to a planned electrical transformation red-black graph, and matching automatic nodes.
S64: determining a red-black image of the current situation of the distribution network to the planned electrical transition, and storing the boundary geographic information of the preliminary grid division scheme and the primary network frame geographic information of the planned feeder group scheme as a distribution network planned geographic edge distribution information base in an electronic map according to the red-black image of the current situation of the distribution network to the planned electrical transition.
S65: and drawing a total wiring diagram, comparing the current situation of the distribution network with a red-black diagram for the conversion from planning electrical to planning electrical, supplementing target net rack information corresponding to the grids of each planning feeder group, and compiling into a text table net of information before and after the transformation of the planning feeder group in the middle area.
S66: drawing a power supply range diagram of the target grid substation, and drawing a target grid block area and grid division diagram.
S7: planning feeder group load prediction verification and transformer substation load prediction verification: calculating the load demand condition of the medium voltage distribution network grid ten years later by using a load density index method by taking a planning feeder group as a unit, and verifying whether the planning feeder group meets the requirements of unlimited power supply and rotatable power supply; and meanwhile, stacking the load demand condition of each transformer substation ten years later according to the load of each main power supply of the medium-voltage distribution network grid, and carrying out high-voltage distribution network planning to check the planning result of the high-voltage distribution network, wherein if the high-voltage distribution network planning result passes the check, the following steps are continued, and if the high-voltage distribution network planning result does not pass the check, the step S5 is returned to for adjustment. And the planning time in the middle period is ten years later, the planning time in the near period is five years, and the planning time in the long period is more than fifteen years.
S8: and (3) carrying out optical cable coverage planning compilation based on the target net rack and the primary and secondary layers: according to a distribution network planning geographical distribution information base, the optical cable target net racks of primary and secondary layering are planned first, and accordingly annual optical cable construction planning is obtained.
S9: and checking the planning method.
In step S9, the method includes the following steps:
s91: and extracting the geographic information of all the automatic function nodes of the primary target network frame to form an optical cable service terminal demand geographic information base, and extracting the geographic information of the line path of the target network frame and the current distribution network communication optical cable path.
S92: the path of the optical cable in the target grid line path, which is led out from the transformer substation and looped back to the transformer substation, is a main channel, and each main channel is connected with a service terminal in series and is independent of each other.
Planning the optical cable path by comparing the path of the primary target net rack with the path of the medium-voltage line;
s93: and after the main channel covers the area, the wire is led out from the main channel, the wire is looped back to the main channel, the local area of the terminal which is not accessed is supplemented through planning the secondary channel, and the secondary channel is the wire led out from the main channel and looped back to the path of the main channel.
S94: t contact terminating: the T-joint of the secondary channel and the main channel and the T-joint extending from the secondary channel are arranged in a switch station or a newly-built ring main box which can be used for building end equipment.
S95: and forming a preliminary optical cable construction scale geographic information base, and solidifying geographic information of each service terminal looped access transformer substation by taking the planning feeder group as a unit to form an optical cable terminal access geographic information base.
S96: and forming a fixed-draft optical cable construction scale geographic information base, and synchronously describing the access topological relation on a primary target grid map when the optical cable terminal is accessed into the geographic information base.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (7)
1. A medium voltage distribution network grid planning method is characterized by comprising the following steps:
s1: collecting the current situation information and data of the distribution network, realizing the establishment of a dual-power-supply station account of a user and the arrangement of a current-situation feeder group station account, and then drawing a main contact diagram of the current-situation feeder group;
s2: collecting the current situation geographic information of the distribution network, and realizing the arrangement of a current situation geographic information base of the distribution network and the arrangement of a main contact geographic information base of a current situation feeder group;
s3: collecting the current situation and planning information of the high-voltage distribution network: drawing the current situation of the high-voltage distribution network and the current situation of the substation in the planning information collection into an electronic map, marking the substations with different voltage grades, and displaying the planned production life of the substations;
marking a power supply range outline of the current transformer substation in the electronic map, and drawing a power supply range of the current transformer substation in the electronic map according to the power supply range outline;
s4: after the step S1, the step S2 and the step S3 are completed, determining a power supply direction and a primary power supply range scheme of the transformer substation: according to the planning result of the high-voltage distribution network, determining a power supply direction and a primary power supply range scheme of a transformer substation, selecting a planning feeder group scheme and planning the feeder group according to the primary power supply range scheme, and stacking the power supply range of each transformer substation according to the main power supply range of each circuit determined by planning the planning feeder group;
s5: determining a preliminary grid division scheme and a planned feeder group scheme: according to the step S4, obtaining a preliminary grid division scheme and a planned feeder group scheme, and solidifying grid boundaries and trunks of the preliminary grid division scheme and the planned feeder group scheme in the electronic map along the distribution path;
s6: programming a planning feeder group in the grid: determining a grid division scheme, planning a feeder group primary network frame planning and a year-by-year conversion process by combining a distribution network current situation to a planning electrical conversion red-black picture, a distribution network planning geographical edge distribution information base and a text table net of information before and after feeder group transformation;
s7: planning feeder group load prediction verification and transformer substation load prediction verification: calculating the load demand condition of the medium voltage distribution network grid ten years later by using a load density index method by taking a planning feeder group as a unit, and verifying whether the planning feeder group meets the requirements of unlimited power supply and rotatable power supply; meanwhile, stacking the load demand condition of each transformer substation ten years later according to the load of each main power supply of the medium-voltage distribution network grid, and performing high-voltage distribution network planning to check the planning result of the high-voltage distribution network, wherein if the high-voltage distribution network is checked to be passed, the following steps are continued, and if the high-voltage distribution network is not checked to be passed, the step S5 is returned to for adjustment;
s8: and (3) carrying out optical cable coverage planning compilation based on the target net rack and the primary and secondary layers: according to a distribution network planning geographical distribution information base, planning primary and secondary layered optical cable target net racks firstly to obtain annual optical cable construction planning;
s9: and checking the planning method.
2. The method for planning a grid of a medium-voltage distribution network according to claim 1, wherein in step S4, the planning of feeder group scheme selection includes networking line selection, main/standby supply line selection, and whole line secant demonstration.
3. The method for planning the grid of the medium-voltage distribution network according to claim 1, wherein in step S6, the step of converting the current situation of the distribution network into the planned electrical connection diagram in red and black is a step of drawing a transition process of the electrical connection diagram from the current situation to the target network rack by using the planned feeder group as a unit.
4. The method for planning grids of a medium voltage distribution network according to claim 3, wherein in step S6, the distribution network planning geographical distribution information base is a collection of information stored on an electronic map by using the preliminary grid division scheme boundary geographical information and the planning feeder group scheme primary grid structure geographical information.
5. The method for planning a grid for a medium voltage distribution network according to claim 3, wherein in step S6, the text ledger of information before and after feeder group modification is a text ledger for recording the connection mode and related lines before and after feeder group modification.
6. The method for planning a grid for a medium voltage distribution network according to claim 1, wherein the step S6 comprises the steps of:
s61: displaying the current geographical information of the grid boundary and all distribution networks, screening and primarily meshing the lines passing through the grid area in the scheme, integrating the trunk contact diagrams of the current feeder groups associated with the lines passing through the grid area, and supplementing the equipment information on the main branches;
s62: comparing the information of the main distribution path of the planned feeder group scheme with the geographical information of the preliminary grid division scheme and the planned feeder group scheme, adjusting the preliminary grid division scheme and the planned feeder group scheme, drawing the current situation of the preliminary distribution network to a planned electrical transition red-black image, and synchronously modifying the preliminary grid division scheme and the planned feeder group scheme;
s63: checking treatment subsection unbalance by combining the current situation of the primary distribution network to a planned electrical transformation red-black graph, and matching automatic nodes;
s64: determining a red-black image of the current situation of the distribution network to the planned electrical transition, and storing the boundary geographic information of the preliminary grid division scheme and the primary network frame geographic information of the planned feeder group scheme as a distribution network planned geographic edge distribution information base in an electronic map according to the red-black image of the current situation of the distribution network to the planned electrical transition;
s65: drawing a total wiring diagram, comparing the current situation of a distribution network with a red-black diagram for the conversion from planning electrical to planning electrical, supplementing target net rack information corresponding to the grids of each planning feeder group, and compiling into a text table net of information before and after the transformation of the planning feeder group in the middle area;
s66: drawing a power supply range diagram of the target grid substation, and drawing a target grid block area and grid division diagram.
7. The method for planning a grid for a medium voltage distribution network according to claim 1, wherein the step S9 comprises the following steps:
s91: extracting all the geographical information of the automatic function nodes of the primary target network frame to form an optical cable service terminal demand geographical information base, and extracting the geographical information of a target network frame line path and a current distribution network communication optical cable path;
s92: the path of the optical cable in the target grid line path, which is led out from the transformer substation and looped back to the transformer substation, is a main channel, and each main channel is connected with a service terminal in series and is independent of each other;
planning the optical cable path by comparing the path of the primary target net rack with the path of the medium-voltage line;
s93: after the main channel covers the area, the wire is led out from the main channel and looped back to the main channel, the local area of the terminal which is not accessed is supplemented through planning a secondary channel, the secondary channel is the wire led out from the main channel and looped back to the path of the main channel;
s94: t contact terminating: the T-joint of the secondary channel and the main channel and the T-joint extending from the secondary channel are arranged in a switch station or a newly-built ring main box which can be used for building end equipment;
s95: forming a preliminary optical cable construction scale geographic information base, and solidifying geographic information of each service terminal which is connected into the transformer substation in a looped mode by taking a planning feeder group as a unit to form an optical cable terminal access geographic information base;
s96: and forming a fixed-draft optical cable construction scale geographic information base, and synchronously describing the access topological relation on a primary target grid map when the optical cable terminal is accessed into the geographic information base.
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