A method for power grid partitioning based on maximum power supply capability

Abstract

The invention discloses a power grid zoning method based on maximum power supply capacity, belonging to the field of power transmission system. The method comprises the following steps: determining the coordinates of a substation on a map, and dividing the power supply area to be divided into a plurality of grid power supply areas; recording the power consumption value of each grid power supply area in different time periods; calculating the ratio value Y of the power consumption score Y2 and the total power consumption value Y1 of a plurality of grid power supply areas in each time period according to the power consumption value of the grid power supply area in different time periods; dividing a plurality of grid power supply areas into deep power consumption areas, middle power consumption areas and shallow power consumption areas according to the ratio value Y of the same time period of the plurality of grid power supply areas, which can realize the selection of power supply relations between different substations and different grid power supply areas according to different power consumption conditions of different grid power supply areas, thereby maximizing the use of the electric energy of the substation to supply power to the power supply area and ensuring the power supply effect.

Description

Technical Field

[0001] The present invention relates to the field of power transmission and distribution systems, and more specifically, to a power grid partitioning method based on maximum power supply capacity. Background Art

[0002] For a long time, the power grids in many cities in my country have had many problems, such as insufficient power supply capacity, uncertain network transfer capacity, low utilization of power grid equipment, unbalanced load, and large losses. The power system is facing increasingly heavy planning tasks, which puts higher requirements on the planning and operation of the power grid. The optimization of power grid power supply zoning has become an issue worthy of attention.

[0003] For example, a distribution network partitioning method based on maximum power supply capacity disclosed in application publication number CN104836224A can obtain an accurate optimal partitioning scheme and make partitioning faster, making distribution network planning faster and more effective;

[0004] However, the problem in the prior art that different substations and power supply relationships between different grid power supply areas cannot be selected according to different power consumption situations in different grid power supply areas, the power supply area cannot be supplied with power in the largest possible way, and the power supply effect cannot be effectively guaranteed. Therefore, we propose a power grid zoning method based on maximum power supply capacity. Summary of the invention

[0005] 1. Technical issues to be solved

[0006] In view of the problems existing in the prior art, the purpose of the present invention is to provide a power grid zoning method based on the maximum power supply capacity, which can realize the power supply relationship between different substations and different grid power supply areas according to the different power consumption conditions of different grid power supply areas, so as to maximize the use of the electric energy of the substation to supply power to the power supply area and ensure the power supply effect.

[0007] 2. Technical solution

[0008] To solve the above problems, the present invention adopts the following technical solutions.

[0009] A method for partitioning a power grid based on maximum power supply capacity comprises the following steps:

[0010] S1. Determine the coordinates of the substation on the map and divide the power supply area to be divided into several grid power supply areas;

[0011] S2. Record the power consumption of each grid power supply area in different time periods;

[0012] S3. According to the power consumption value of the grid power supply area in different time periods, calculate the ratio value Y of the power consumption score Y2 and the total power consumption Y1 of several grid power supply areas in each time period;

[0013] S4. According to the ratio value Y of several grid power supply areas in the same time period, several grid power supply areas are divided into deep power consumption areas, middle power consumption areas and shallow power consumption areas;

[0014] S5. Calculate the ratio F of the power generation score F2 and the total power generation value F1;

[0015] S6. According to the substation ratio value F, the substation is divided into a preparatory emergency group, a primary power supply group, a secondary power supply group and a tertiary power supply group. The primary power supply group, the secondary power supply group, the tertiary power supply group and the deep power consumption area, the middle power consumption area and the shallow power consumption area correspond one to one to form a three-level power supply area;

[0016] S7. In the same supply area, the power supply relationship between the substation and the grid power supply area is selected according to the ratio value Y of the substation and the ratio value F of the grid power supply area.

[0017] Furthermore, S1 includes the following steps:

[0018] S101. Determine the coordinates of the substations on the map and number the substations, namely Ba, Bb, Bc, ..., Bɑ;

[0019] S102. Divide the power supply area to be divided into several grid power supply areas in a grid shape on the map and number them as D1, D2, D3, ..., Dx respectively.

[0020] Furthermore, S2 includes the following steps:

[0021] S201. Record the power consumption of each grid power supply area;

[0022] S202. Divide the power consumption value of the grid power supply area into 24 time periods in 24 hours, and record the power consumption values ​​of different time periods as Yαβ, where α is the number of the grid power supply area and β is the number of the time period.

[0023] Furthermore, S3 includes the following steps:

[0024] S301. Calculate the total power consumption Y1 of several grid power supply areas in each time period;

[0025] S302. Calculate the power consumption score Y2 of a single grid power supply area in each time period;

[0026] S303. Calculate the ratio Y between the electricity consumption score Y2 and the total electricity consumption Y1.

[0027] Furthermore, the calculation formula of the proportion value Y is 100%*electricity consumption score Y2 / total electricity consumption value Y1.

[0028] Furthermore, S4 includes the following steps:

[0029] S401. Select the first-level power consumption index A1 and the second-level power consumption index A2;

[0030] S402. Fitting a power consumption line graph according to the ratio value Y of several grid power supply areas;

[0031] S403. According to the primary power consumption index A1 and the secondary power consumption index A2, a plurality of grid power supply areas are divided into deep power consumption areas, middle power consumption areas and shallow power consumption areas on the power consumption line graph;

[0032] The grid power supply area with a ratio value Y greater than the first-level power consumption index A1 is a deep power consumption area;

[0033] The grid power supply area with a ratio value Y not greater than the first-level power consumption index A1 and greater than the second-level power consumption index A2 is the middle-level power consumption area;

[0034] The grid power supply area with a ratio value Y not greater than the secondary power consumption index A2 is a shallow power consumption area.

[0035] Furthermore, S5 includes the following steps:

[0036] S501. Record the total power generation value F1 of all substations;

[0037] S502. Record the power generation score F2 of each substation;

[0038] S503. Calculate the ratio value F based on the recorded total power generation value F1 and power generation score F2.

[0039] Furthermore, the calculation formula of the proportion value F is 100%*power generation score F2 / total power generation value F1.

[0040] Furthermore, S6 includes the following steps:

[0041] S601. Select the emergency power supply index G3, the first-level power supply index G1 and the second-level power supply index G2;

[0042] S602. Fitting a power supply bar graph according to the ratio value F of the substation;

[0043] S603. According to the emergency power supply index G3, the first-level power supply index G1 and the second-level power supply index G2, the substation is divided into a preparatory emergency group, a first-level power supply group, a second-level power supply group and a third-level power supply group on the power supply bar chart;

[0044] The substation with a ratio value Y greater than the emergency power supply index G3 is the reserve emergency group;

[0045] The substation with a ratio value Y not greater than the emergency power supply index G3 and greater than the first-level power supply index G1 is a first-level power supply group;

[0046] The substation with the ratio value Y not greater than the first-level power supply index G1 and greater than the second-level power supply index G2 is the second-level power supply group;

[0047] The substation whose ratio value Y is not greater than the first-level power supply index G1 is the third-level power supply group.

[0048] Furthermore, the power supply relationship is selected by taking the proportion value of the substation as the extreme value, and then selecting multiple grid power supply areas in turn until the remainder of the extreme value minus the sum of the proportion values ​​of multiple grid power supply areas is the smallest, and then selecting the next substation power supply relationship according to the above method.

[0049] 3. Beneficial effects

[0050] Compared with the prior art, the advantages of the present invention are:

[0051] (1) Through various steps, this scheme can select the power supply relationship between different substations and different grid power supply areas according to the different power consumption conditions of different grid power supply areas, so as to maximize the use of substation power to supply power to the power supply area and ensure the power supply effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 It is a flow chart of the present invention. DETAILED DESCRIPTION

[0053] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0054] Embodiment 1:

[0055] See also Figure 1 As shown, a power grid partitioning method based on maximum power supply capacity includes the following steps:

[0056] Step 1: Determine the coordinates of the substation on the map and divide the power supply area to be divided into several grid power supply areas;

[0057] The first step includes the following steps:

[0058] 1. Determine the coordinates of the substations on the map and number the substations as Ba, Bb, Bc, …, Bɑ;

[0059] 2. Divide the power supply area to be divided into several grid power supply areas in a grid shape on the map and number them as D1, D2, D3, ..., Dx respectively;

[0060] Step 2: Record the power consumption of each grid power supply area in different time periods;

[0061] The second step includes the following steps:

[0062] A. Record the power consumption of each grid power supply area;

[0063] B. Divide the power consumption of the grid power supply area into 24 time periods in 24 hours, and record the power consumption of different time periods as Yαβ, where α is the number of the grid power supply area and β is the number of the time period;

[0064] Here, the 24 time periods are numbered in chronological order as time period 1, time period 2, ..., time period 24;

[0065] Step 3: According to the power consumption values ​​of the grid power supply area in different time periods, calculate the ratio value Y of the power consumption score Y2 and the total power consumption value Y1 of several grid power supply areas in each time period;

[0066] The third step includes the following steps:

[0067] 1. Calculate the total power consumption Y1 of several grid power supply areas in each time period;

[0068] 2. Calculate the power consumption score Y2 of a single grid power supply area in each time period;

[0069] 3. Calculate the ratio Y of the electricity score Y2 and the total electricity value Y1. The calculation formula is 100%*electricity score Y2 / total electricity value Y1;

[0070] Step 4: according to the ratio value Y of the same time period of the several grid power supply areas, the several grid power supply areas are divided into deep power consumption areas, middle power consumption areas and shallow power consumption areas;

[0071] Among them, the deep power consumption area refers to the area with a higher power consumption ratio, the middle power consumption area refers to the area with a moderate power consumption ratio, and the shallow power consumption area refers to the area with a lower power consumption ratio;

[0072] Here, the fourth step includes the following steps:

[0073] a. Select the first-level power consumption index A1 and the second-level power consumption index A2;

[0074] b. Fitting a power consumption line graph according to the proportion value Y of several grid power supply areas;

[0075] c. According to the primary power consumption index A1 and the secondary power consumption index A2, several grid power supply areas are divided into deep power consumption areas, middle power consumption areas and shallow power consumption areas on the power consumption line chart;

[0076] Among them, the grid power supply area with a ratio value Y greater than the first-level power consumption index A1 is the deep power consumption area;

[0077] Among them, the grid power supply area with a ratio value Y not greater than the first-level power consumption index A1 and greater than the second-level power consumption index A2 is the middle-level power consumption area;

[0078] Among them, the grid power supply area with a ratio value Y not greater than the secondary power consumption index A2 is a shallow power consumption area;

[0079] Step 5: Calculate the ratio F between the power generation score F2 and the total power generation value F1;

[0080] The fifth step includes the following steps:

[0081] Record the total power generation value F1 of all substations; record the power generation score F2 of each substation; calculate the proportion value F according to the recorded total power generation value F1 and power generation score F2, and the calculation formula is 100%*power generation score F2 / total power generation value F1; Step 6: Divide the substation into a preparatory emergency group, a primary power supply group, a secondary power supply group and a tertiary power supply group according to the substation proportion value F. The primary power supply group, the secondary power supply group, the tertiary power supply group and the deep power consumption area, the middle power consumption area and the shallow power consumption area correspond one to one to form a three-level power supply area;

[0082] ①. Select the emergency power supply index G3, the first-level power supply index G1 and the second-level power supply index G2;

[0083] ②. Fit the power supply bar graph according to the proportional value F of the substation

[0084] ③. According to the emergency power supply index G3, the first-level power supply index G1 and the second-level power supply index G2, the substation is divided into the preparatory emergency group, the first-level power supply group, the second-level power supply group and the third-level power supply group on the power supply bar chart;

[0085] Among them, the substation with a ratio value Y greater than the emergency power supply index G3 is the reserve emergency group;

[0086] Among them, the substation with a ratio value Y not greater than the emergency power supply index G3 and greater than the first-level power supply index G1 is the first-level power supply group;

[0087] Among them, the substation with a ratio value Y not greater than the first-level power supply index G1 and greater than the second-level power supply index G2 is the second-level power supply group;

[0088] Among them, the substation with a ratio value Y not greater than the first-level power supply index G1 is a third-level power supply group;

[0089] Step 7: In the same supply area, select the power supply relationship between the substation and the grid power supply area according to the proportional value Y of the substation and the proportional value F of the grid power supply area.

[0090] Here, the power supply relationship is selected by taking the proportion value of the substation as the extreme value, and then selecting multiple grid power supply areas in turn until the remainder of the extreme value minus the sum of the proportion values ​​of multiple grid power supply areas is the smallest, and then selecting the next substation power supply relationship according to the above method.

[0091] In summary, through various steps, the present invention can select the power supply relationship between different substations and different grid power supply areas according to the different power consumption conditions of different grid power supply areas, so as to maximize the use of the electric energy of the substation to supply power to the power supply area and ensure the power supply effect.

[0092] The above is only a preferred specific implementation of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and its improved conception within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for partitioning a power grid based on maximum power supply capacity, characterized in that: The following steps are included: S1. Determine the coordinates of the substation on the map and divide the power supply area to be divided into several grid power supply areas; S2. Record the power consumption of each grid power supply area in different time periods; S3. According to the power consumption value of the grid power supply area in different time periods, calculate the ratio value Y of the power consumption score Y2 and the total power consumption Y1 of several grid power supply areas in each time period; S3 includes the following steps: S301. Calculate the total power consumption Y1 of several grid power supply areas in each time period; S302. Calculate the power consumption score Y2 of a single grid power supply area in each time period; S303. Calculate the ratio Y of the electricity score Y2 and the total electricity value Y1; S4. According to the ratio value Y of several grid power supply areas in the same time period, several grid power supply areas are divided into deep power consumption areas, middle power consumption areas and shallow power consumption areas; S5. Calculate the ratio F of the power generation score F2 and the total power generation value F1; S5 also includes the following steps: S501. Record the total power generation value F1 of all substations; S502. Record the power generation score F2 of each substation; S503. Calculate the ratio value F based on the recorded power generation score F2 and the total power generation value F1; S6. According to the substation ratio value F, the substation is divided into a preparatory emergency group, a primary power supply group, a secondary power supply group and a tertiary power supply group. The primary power supply group, the secondary power supply group, the tertiary power supply group and the deep power consumption area, the middle power consumption area and the shallow power consumption area correspond one to one to form a three-level power supply area; S7. In the same supply area, the power supply relationship between the substation and the grid power supply area is selected according to the proportional value Y of the substation and the proportional value F of the grid power supply area. The power supply relationship is selected by taking the proportional value of the substation as the extreme value, and then selecting multiple grid power supply areas in turn until the remainder of the extreme value minus the sum of the proportional values ​​of the multiple grid power supply areas is the smallest, and then selecting the next substation power supply relationship according to the above method.

2. A method for partitioning a power grid based on maximum power supply capacity according to claim 1, characterized in that: S1 also includes the following steps: S101. Determine the coordinates of the substations on the map and number the substations, namely Ba, Bb, Bc, ..., Bɑ; S102. Divide the divided power supply area into several grid power supply areas in a grid shape on the map and number them as D1, D2, D3, ..., Dx respectively.

3. A method for partitioning a power grid based on maximum power supply capacity according to claim 1, characterized in that: S2 also includes the following steps: S201. Record the power consumption of each grid power supply area; S202. Divide the power consumption value of the grid power supply area into 24 time periods in 24 hours, and record the power consumption values ​​of different time periods as Yαβ, where α is the number of the grid power supply area and β is the number of the time period.

4. A method for power grid partitioning based on maximum power supply capacity according to claim 1, characterized in that: The calculation formula for the proportion value Y is 100%*electricity consumption score Y2 / total electricity consumption value Y1.

5. A method for partitioning a power grid based on maximum power supply capability according to claim 1, characterized in that: S4 also includes the following steps: S401. Select the first-level power consumption index A1 and the second-level power consumption index A2; S402. Fitting a power consumption line graph according to the ratio value Y of several grid power supply areas; S403. According to the primary power consumption index A1 and the secondary power consumption index A2, a plurality of grid power supply areas are divided into deep power consumption areas, middle power consumption areas and shallow power consumption areas on the power consumption line graph; The grid power supply area with a ratio value Y greater than the first-level power consumption index A1 is a deep power consumption area; The grid power supply area with a ratio value Y not greater than the first-level power consumption index A1 and greater than the second-level power consumption index A2 is the middle-level power consumption area; The grid power supply area with a ratio value Y not greater than the secondary power consumption index A2 is a shallow power consumption area.

6. A method for partitioning a power grid based on maximum power supply capability according to claim 1, characterized in that: The calculation formula of the proportion value F is 100%*power generation score F2 / total power generation value F1.

7. A method for partitioning a power grid based on maximum power supply capability according to claim 1, characterized in that: S6 further comprises the following steps: S601. Select the emergency power supply index G3, the first-level power supply index G1 and the second-level power supply index G2; S602. Fitting a power supply bar graph according to the ratio value F of the substation; S603. According to the emergency power supply index G3, the first-level power supply index G1 and the second-level power supply index G2, the substation is divided into a preparatory emergency group, a first-level power supply group, a second-level power supply group and a third-level power supply group on the power supply bar chart; The substation with a ratio value Y greater than the emergency power supply index G3 is the reserve emergency group; The substation with a ratio value Y not greater than the emergency power supply index G3 and greater than the first-level power supply index G1 is a first-level power supply group; The substation with the ratio value Y not greater than the first-level power supply index G1 and greater than the second-level power supply index G2 is the second-level power supply group; The substation whose ratio value Y is not greater than the first-level power supply index G1 is the third-level power supply group.

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