CN108565851A - High-voltage fence model and its method for transformation, device - Google Patents

Abstract

The invention discloses a high-voltage power grid model and its transformation method and device for calculating substation full-stop and full-rotation. Based on the principle that "one transmission line strictly corresponds to one upper-level substation and one subordinate substation", a simple The high-voltage power grid model converts the existing power grid structure into a 110/35kV power grid topology model, which can be used for the digitization of the existing substation full-stop and full-turn algorithm, so that users can convert the existing power grid data into a full-scale power grid based on this method. Fill in the data required for full-stop calculation in the full-stop calculation tool for full-stop calculation. The invention adapts to various power grid wiring structures, and can help users conveniently and quickly convert the current grid data into required grid model data, quickly determine the influence range of power outage substations, and Find out the line that can supply power for the power-off main transformer, and solve the problem of difficult analysis and calculation of the original grid topology.

Description

High-voltage power grid model and its conversion method and device

technical field

The invention relates to the technical field of full-stop and full-turn calculation of substations in a high-voltage power grid, in particular to a high-voltage power grid model used for full-stop and full-turn calculation of substations and a conversion method and device thereof.

Background technique

Substation full stop and full rotation is a method of simulating and calculating the power transfer capacity of other normal substations through all levels of power grids when a single substation in the power grid is out of power. It is an important method to evaluate the structure and reliability of the distribution network grid. Before calculating the full stop and full rotation of substations, it is necessary to digitize the equipment in the power grid and its topological relationship. However, in fact, the high-voltage power grid is usually more complicated, and it is difficult to design a full stop and full rotation algorithm directly based on the current data of the power grid. In all special cases, the algorithm is less versatile.

Therefore, in order to realize the calculation method of full stop and full rotation of substations and design corresponding calculation tools, it is necessary to design a simple high-voltage grid topology model and provide a method for converting existing grid data to this grid model.

Contents of the invention

In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide a high-voltage power grid model and its transformation method and device for calculating substation full stop and full rotation, aiming to solve the problem of the existing technology in the dataization of equipment and its topological relationship in the power grid It is relatively difficult, which leads to the problem of high difficulty and poor versatility of the substation full stop and full turn algorithm.

The object of the present invention adopts following technical scheme to realize:

A conversion method of a high-voltage power grid model used for calculation of substation full stop and full turn, including:

T direct transformation steps:

When the first end T of the first transmission line is connected to the second transmission line of the same voltage level to obtain power, the first end of the first transmission line is directly connected to the upper main transformer of the second transmission line;

Conversion steps at the same level at both ends:

When the two ends of the third transmission line are respectively connected to the high-voltage buses of the third main transformer and the fourth main transformer of the same voltage level, the upper main transformer of the third main transformer becomes the first main transformer and the fourth main transformer The upper-level main transformer becomes the second main transformer, and the third transmission line is split into the fourth transmission line and the fifth transmission line;

The fourth transmission line is connected between the first main transformer and the fourth main transformer; the fifth transmission line is connected between the second main transformer and the third main transformer;

One for two transformation steps:

When the eighth transmission line supplies power to two main transformers at the same time, the eighth transmission line is split into the ninth transmission line and the tenth transmission line;

The ninth transmission line is connected between the upper main transformer of the eighth transmission line and a main transformer belonging to one, and the tenth transmission line is connected between the upper main transformer of the eighth transmission line and the other main transformer.

On the basis of the foregoing embodiments, preferably, the T-connection conversion step further includes:

According to the main variable capacity of the first transmission line and the second transmission line, the maximum allowable current of the first transmission line and the second transmission line is distributed.

On the basis of the above embodiments, preferably, the maximum allowable currents of the first transmission line and the second transmission line are respectively:

in:

I _max1 : the maximum allowable current of the first transmission line;

I _max2 : the maximum allowable current of the second transmission line;

S ₁ : the main transformer capacity of the first transmission line;

S ₂ : the main transformer capacity of the second transmission line;

Isafety _-2 : The safety current of the second transmission line.

On the basis of any of the above embodiments, preferably, the conversion step at both ends further includes:

Take the transmission line between the first main transformer and the third main transformer as the sixth transmission line, and allocate the maximum allowable current of the fourth transmission line and the sixth transmission line according to the main transformer capacity of the fourth transmission line and the sixth transmission line;

Taking the transmission line between the second main transformer and the fourth main transformer as the seventh transmission line, the maximum allowable current of the fifth transmission line and the seventh transmission line is allocated according to the main transformer capacity of the fifth transmission line and the seventh transmission line.

On the basis of the foregoing embodiments, preferably,

The maximum allowable currents of the fourth transmission line and the sixth transmission line are respectively:

in:

I _max4 : the maximum allowable current of the fourth transmission line;

I _max6 : the maximum allowable current of the sixth transmission line;

S ₄ : the main transformer capacity of the fourth transmission line;

S ₆ : the main transformer capacity of the sixth transmission line;

I _safety-6 : the safety current of the sixth transmission line;

The maximum allowable currents of the fifth transmission line and the seventh transmission line are respectively:

in:

I _max5 : the maximum allowable current of the fifth transmission line;

I _max7 : the maximum allowable current of the seventh transmission line;

S ₅ : the main transformer capacity of the fifth transmission line;

S ₇ : the main transformer capacity of the seventh transmission line;

Isafety _-7 : The safety current of the seventh transmission line.

On the basis of any of the above embodiments, preferably, the step of converting from one to two further includes:

According to the main variable capacity of the ninth transmission line and the tenth transmission line, the maximum allowable current of the ninth transmission line and the tenth transmission line is allocated.

On the basis of the above embodiment, preferably, the maximum allowable currents of the ninth transmission line and the tenth transmission line are respectively:

in:

I _max9 : the maximum allowable current of the ninth transmission line;

I _max10 : the maximum allowable current of the tenth transmission line;

S ₉ : the main transformer capacity of the ninth transmission line;

S ₁₀ : the main transformer capacity of the tenth transmission line;

Isafe _-8 : The safety current of the eighth transmission line.

A high-voltage power grid model for calculation of substation full-stop and full-rotation, said model is transformed by the existing high-voltage power grid model through the transformation method of the high-voltage power grid model for substation full-stop and full-rotation calculation in any one of the above embodiments get.

On the basis of the above embodiments, it preferably includes 220kV, 110kV and 35kV substations, and 110kV and 35kV transmission lines.

A conversion device for a high-voltage power grid model used for full-stop and full-rotation calculations in substations, including:

T-connection conversion module for:

When the first end T of the first transmission line is connected to the second transmission line of the same voltage level to obtain power, the first end of the first transmission line is directly connected to the upper main transformer of the second transmission line;

Conversion modules at the same level at both ends, used for:

When the two ends of the third transmission line are respectively connected to the high-voltage buses of the third main transformer and the fourth main transformer of the same voltage level, the upper main transformer of the third main transformer becomes the first main transformer and the fourth main transformer The upper-level main transformer becomes the second main transformer, and the third transmission line is split into the fourth transmission line and the fifth transmission line;

The fourth transmission line is connected between the first main transformer and the fourth main transformer; the fifth transmission line is connected between the second main transformer and the third main transformer;

One supply two conversion module, used for:

When the eighth transmission line supplies power to two main transformers at the same time, the eighth transmission line is split into the ninth transmission line and the tenth transmission line;

The ninth transmission line is connected between the upper main transformer of the eighth transmission line and a main transformer belonging to one, and the tenth transmission line is connected between the upper main transformer of the eighth transmission line and the other main transformer.

Compared with the prior art, the beneficial effects of the present invention are:

The invention discloses a high-voltage power grid model and a conversion method and device for calculating substation full stop and full rotation. The model is a simplified high-voltage power grid model based on the principle that "a transmission line strictly corresponds to a superior substation and a subordinate substation". In principle, a simple high-voltage power grid model with a clear relationship between the upper and lower levels is constructed, and the existing power grid structure is transformed into a 110/35kV power grid topology model, which can be used for the digitization of the existing substation full-stop and full-turn algorithm, enabling users to base on this The method can convert the existing power grid data into the data required for full-stop and full-rotation calculation and fill it into the full-stop calculation tool for full-stop calculation. The invention adapts to various power grid wiring structures, and can help users conveniently and quickly convert the current grid data into required grid model data, quickly determine the influence range of power outage substations, and Find out the line that can supply power for the power-off main transformer, and solve the problem of difficult analysis and calculation of the original grid topology.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 shows a schematic flow chart of a conversion method of a high-voltage power grid model used for substation full-stop and full-rotation calculation provided by an embodiment of the present invention;

Figure 2 shows a schematic diagram of a high-voltage power grid model and conversion principles provided by an embodiment of the present invention;

Fig. 3 shows a schematic diagram of a converted high-voltage grid model provided by an embodiment of the present invention;

Fig. 4 shows another high-voltage power grid model and a schematic diagram of the conversion principle provided by the embodiment of the present invention;

Fig. 5 shows a schematic structural diagram of a conversion device for a high-voltage power grid model used for calculating substation full stop and full rotation provided by an embodiment of the present invention.

Detailed ways

Below, the present invention will be further described in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of not conflicting, the various embodiments described below or the technical features can be combined arbitrarily to form new embodiments. .

Specific embodiment one

As shown in FIG. 1 and FIG. 2 , an embodiment of the present invention provides a high-voltage grid model and a conversion method thereof.

This transformation method can be applied to the simplification of 110kV and 35kV power grid topology, and the model can include 220kV, 110kV and 35kV substations and main transformers as well as 110kV and 35kV high-voltage lines.

The model makes the following provisions for the data structure of the main transformer and transmission line (110/35kV line):

Main transformer: In addition to the basic attributes of the main transformer such as the number of the main transformer and the substation it belongs to, all transmission lines that may obtain power from the main transformer need to be filled in the table of the main transformer, including main supply lines, contact lines and reinforcement lines. Among them, the main power supply line is the power supply line under the normal operation mode of the main transformer; the contact line is the main power supply line of the main transformer. And other lines that may supply power to the main transformer outside the contact line. In the form of the main transformer, only the data of the upper-level transmission line needs to be filled in, and there is no need to fill in the data of the lower-level transmission line. The main variable data table can be shown in Table 1.

Table I

Transmission line: In addition to the basic attributes of the transmission line such as line name and voltage level, the transmission line form needs to fill in the substation to which the line belongs, the main transformer to which it belongs, the upper-level substation and the upper-level main transformer. Among them, the affiliated substation and the affiliated main transformer refer to the substation and main transformer that mainly supply power to the transmission line in the normal operation mode. There can only be one main power supply substation and main transformer for a transmission line; the upper-level substation and the upper-level main transformer refer to the normal operation mode The main transformer that supplies power for the transmission line, the transmission line should only have the uniquely determined upper-level substation and upper-level main transformer. The transmission line data table may be as shown in Table 2.

Table II

Through the upper-lower relationship data of the main transformer and transmission line above, a power grid topology structure from high-voltage substations to transmission lines to lower-level substations is constructed, and the modeling of the 110/35kV power grid structure topology is completed.

The reality of the power grid structure may not be so ideal. As shown in the "original power grid" in Figure 2, many transmission lines do not conform to the "110/35kV power grid model" that "each transmission line has a superior substation and its own substation". It may be directly connected to other transmission lines of the same voltage level (as shown in line 252-1 in Figure 2) or to obtain power from other high-voltage busbars of substations with the same voltage level (as shown in lines 341 and 342 in Figure 2). At this time, the present invention can be used to implement Example conversion method, the method is as follows:

Situation 1. When the transmission line is T connected to the transmission line of the same voltage level to obtain power (as shown in Figure 2 line 252-1)

In this case, line 252-1 obtains power from line 252, so the actual primary power supply of line 252-1 is the same as line 252, so the upper-level substation and upper-level main transformer are the same as line 252; in terms of power supply capacity, line 252 and line The total power supply capacity of 252-1 is equal to the power supply capacity of line 252, that is, the safe current of line 252, so it is necessary to set the actual power supply capacity (that is, the maximum allowable current) of these two circuits, which can be based on the main power supply of these two lines The ratio of variable capacity distributes the safety current of line 252, and the calculation formula is as follows:

in:

I _max252 : the maximum allowable current of line 252;

I _max252-1 : the maximum allowable current of line 252-1;

S _5-2 : The total capacity of the main power supply and main transformer of line 252 (that is, the No. 2 main transformer of substation 5);

S _6-1 : the total capacity of the main power supply and main transformer of line 252-1 (that is, the No. 1 main transformer of substation 6);

_{ISafe 252} : Safe current for line 252 .

Preferably, the calculation result of the maximum allowable current of the line cannot be less than the current load of the main transformer supplied. If it is less than the current load of the main transformer supplied, the allowable current of the line should be increased until the required power supply capacity of the main transformer is met.

Situation 2. When both ends of the transmission line are connected to the high-voltage bus of the substation with the same voltage level (as shown in Figure 2, line 341)

The two ends of line 341 are respectively connected to the high-voltage buses of No. 1 main transformer of substation 3 and No. 1 main transformer of substation 4, but the actual power supply has nothing to do with substations 3 and 4. In normal operation mode, the line is in standby state. Under emergency conditions, when line 341 supplies power for No. 1 main transformer of substation 3, its power comes from line 241, which is the No. 1 main transformer of substation 2; When No. 1 main transformer of 4 supplies power, its power comes from line 131, that is, No. 1 main transformer of substation 1.

Since line 341 can obtain power from substation 1 and substation 2 respectively, and supply power to substation 4 and substation 3, it needs to be split into two lines that meet the model requirements when converting to the power grid model, that is, "after conversion" Line 341-1 and line 341-2, wherein, the upper substation of line 341-1 is substation 1, the subordinate substation is substation 4, the upper substation of line 341-2 is substation 2, and the subordinate substation is substation 3.

In terms of power supply capacity, when line 341-1 supplies power to substation 4, the upper-level power source comes from line 131, so the upper-level substation is the same as line 131, which is the No. 1 main transformer of substation 1. At this time, the power supply capacity of line 341-1 is controlled by line 131 The total power supply capacity of the two lines is equal to the power supply capacity of the line 131, that is, the safe current of the line 131, so it is necessary to set the actual power supply capacity (that is, the maximum allowable current) of the two circuits, and the calculation method is the same as the first one. The situation is similar, and the calculation formula is as follows:

in:

I _max131 : the maximum allowable current of line 131;

I _max341-1 : the maximum allowable current of the line 341-1;

S _3-1 : the total capacity of the main power supply and main transformer of line 131 (that is, the No. 1 main transformer of substation 3);

S _4-1 : the total capacity of the main power supply and main transformer of line 341-1 (that is, the No. 1 main transformer of substation 4);

Isafety ₁₃₁ : the safety current of line 131 .

Preferably, if the calculated power supply capacity of the line 131 is less than the power supply capacity required by its main power supply and main transformer, the calculation result should be adjusted so that the power supply capacity of the line 131 is greater than or equal to the load of its main power supply and main transformer, because the line 131 is The main supply line of substation 3, and line 341-1 is the backup supply line of substation 4. The power demand of substation 3 should be met first before considering supplying power to other substations.

The calculation method of the power supply capacity of the line 341-2 is similar to that of the line 341-1, and will not be repeated here.

Situation 3. When a transmission line supplies power to two main transformers at the same time (as shown in Figure 2, line 17)

Line 17 supplies power to the two main transformers of substation 7 at the same time, which is contrary to the principle that "the main power supply substation and the main transformer of a transmission line can only have one". 2 lines, the split line name can be distinguished by adding "-X" after the original line name, that is, the "converted" line 17-1 and line 17-2.

The superior substation and main transformer of the split line are the same as the original line (that is, the No. No. main change).

In terms of power supply capacity, the total power supply capacity of line 17-1 and line 17-2 is the power supply capacity of line 17, that is, the safe current of line 17, so the two circuits need to be allocated according to the ratio of the capacity of the main power supply and main transformer The maximum allowable current, the calculation formula is as follows;

in:

I _max17-1 : the maximum allowable current of line 17-1;

I _max17-2 : the maximum allowable current of line 17-2;

S _7-1 : the total capacity of the main power supply and main transformer of line 17-1 (that is, the No. 1 main transformer of substation 7);

S _7-2 : the total capacity of the main power supply and main transformer of line 17-2 (namely, the No. 2 main transformer of substation 7);

I _{SAFE 17} : Safe current for line 17.

Preferably, the calculation result of the maximum allowable current of the line cannot be less than the current load of the main transformer supplied. If it is less than the current load of the main transformer supplied, the allowable current of the line should be increased until the required power supply capacity of the main transformer is met.

The embodiment of the present invention can also distribute the line load of line 17-1 and line 17-2. In terms of line load, the total load of line 17-1 and line 17-2 is the load of line 17. Preferably, after splitting The load current is distributed according to the load of the main transformers they supply respectively, and the calculation formula is as follows:

in:

I _17-1 : load current of line 17-1;

I _17-2 : load current of line 17-2;

P _7-1 : Line 17-1 main power supply and main transformer load (that is, No. 1 main transformer of substation 7);

P _7-2 : Line 17-2 main power supply and main transformer load (that is, No. 2 main transformer of substation 7);

I ₁₇ : load current of line 17 .

Situation 1 exists in double-link lines with T connections and many other non-standard wirings. Situations 2 and 3 generally exist in standard high-voltage power grid wiring such as ring network and chain type. Follow the conversion method above for processing. There may be other more complex non-standard wiring in the high-voltage power grid, but it can basically be regarded as a deformation or combination of the above two wirings. In actual analysis, it is only necessary to follow the regulation that a transmission line strictly corresponds to a superior substation and a subordinate substation and the above provided The processing method can handle it.

The transformed grid model is shown in Figure 3.

In the process of transforming the current grid structure into the target grid model, if you encounter a more complex grid structure, you should carefully analyze its operation mode, sort out the relationship between substations and lines in various situations, and then follow each line. Based on the principle of having one subordinate substation and main transformer, and one upper-level substation and main transformer, the power grid is split by means of three split methods, and the power supply capacity of the split power grid model is kept consistent with the status quo.

The embodiment of the present invention is based on the principle that "a transmission line strictly corresponds to a superior substation and a subordinate substation", constructs a simple high-voltage power grid model with a clear relationship between the upper and lower levels, and transforms the existing power grid structure into a 110/35kV power grid topology model, which can be used Based on the digitization of the existing substation full-stop and full-turn algorithm, users can convert the existing grid data into the data required for full-stop and full-turn calculation based on this method and fill it into the full-stop calculation tool for full-stop calculation. The embodiment of the present invention adapts to various power grid wiring structures, and can help users conveniently and quickly convert the current grid data into required grid model data and quickly determine the influence range of power outage substations when the substation is fully stopped and fully turned. , and find out the line that can supply power for the power-off main transformer, which solves the problem of difficult analysis and calculation of the original grid topology.

Specific embodiment two

As shown in FIG. 4 , an embodiment of the present invention provides a high-voltage power grid model in a single-link line mode and a conversion method thereof.

The single-link wiring mode is one of the standard wiring modes for high-voltage power grids. It is often used in 110kV power grids and 35kV power grids with relatively low power supply reliability requirements. In Figure 4, both substation 3 and substation 4 have two main transformers, and the capacity of each main transformer Both are 50MVA, and the main transformer load is 30MW.

In Fig. 4, line 13 supplies power to the two main transformers of substation 3, line 24 supplies power to the two main transformers of substation 4, and line 34 serves as a contact line to provide backup power for substation 3 and substation 4 at the same time, line 13 and line 24 The safety current of line 34 is 500A, and the load current is 0A.

Line 13 and line 24 can be processed using the method of "case 3" in the first embodiment, and line 34 can be processed using the method of "case 2" in the first embodiment, and the processing process is as follows:

Line 13 supplies power to the two main transformers of substation 3, so it needs to be split into two lines: line 13-1 and line 13-2, which supply power to No. 1 main transformer and No. 2 main transformer of substation 3 respectively;

Line 24 supplies power to the two main transformers of substation 4, so it needs to be split into two lines: line 24-1 and line 24-2, which supply power to No. 1 main transformer and No. 2 main transformer of substation 4 respectively;

Line 34 provides backup for substation 3 and substation 4 respectively, so it needs to be split into two lines: line 34-1 and line 34-2, which provide backup for substation 4 and substation 3 respectively, and the backup transmission line does not need to be connected with the main transformer One to one correspondence.

Line power supply capacity after conversion:

Power supply capacity of line 13-1, line 13-2 and line 34-1:

According to the formula of "case 2", the power supply capacity of line 34-1 is:

I _max13 = I _{safe 13} - I _max34-1 = 377A

in:

I _max34-1 : the maximum allowable current of line 34-1;

I _{safety 13} : the safety current of circuit 13;

I _max13 : the maximum allowable current of line 13, that is, the sum of the maximum allowable current of line 13-1 and line 13-2;

I _max13-1 : the maximum allowable current of line 13-1;

S ₃ : total capacity of substation 3;

S ₃₁ : the capacity of No. 1 main transformer of substation 3;

S ₃₂ : the capacity of No. 2 main transformer of substation 3;

S ₄ : total capacity of the substation 4 .

Since the two main transformers in substation 3 have the same capacity, I _max13-2 =I _max13-1 =188.5A. Converting the maximum allowable current into apparent power, the S _{line 34-1} is about 71.8MVA, and the S _{line 13-1} and S _{line 13-2} are both 35.9MVA, which is enough to meet the load demand of the main power substation. The calculation methods and results of the maximum allowable current of the line 24-1, the line 24-2 and the line 34-2 are the same as above, and will not be repeated here.

Converted line load:

The load on line 13-1 is:

in:

I _13-1 : load current of line 13-1;

P _3-1 : No. 1 main transformer load of substation 3;

P _3-2 : No. 2 main transformer load of substation 3;

I ₁₃ : load current of line 13 .

Since the load of each main transformer is the same, the load of the line is also the same, so the load current of line 13-2, line 24-1 and line 24-2 is 79A, and line 34 is a backup line with a load of 0, so there is no need to distribute the load current .

The split main transformer and high-voltage line data tables can be shown in Table 3 and Table 4 respectively.

Table three

Table four

Preferably, if the safe current of the line 34 is less than the maximum allowable current calculated above, then I _max34-1 should take the safe current of the line 34, and I _max13 will increase accordingly.

If the main transformer load of substation 3 exceeds the maximum allowable power supply capacity of line 13-1 and line 13-2, that is, 35.9MVA, the values of I _max13-2 and I _max13-2 should be increased, and the priority of substation 3 should be guaranteed The load power supply demand can calculate the required maximum allowable current according to the main transformer load, and I _max34-1 will be reduced accordingly.

The embodiment of the present invention is based on the principle that "a transmission line strictly corresponds to a superior substation and a subordinate substation", constructs a simple high-voltage power grid model with a clear relationship between the upper and lower levels, and transforms the existing power grid structure into a 110/35kV power grid topology model, which can be used Based on the digitization of the existing substation full-stop and full-turn algorithm, users can convert the existing grid data into the data required for full-stop and full-turn calculation based on this method and fill it into the full-stop calculation tool for full-stop calculation. The embodiment of the present invention adapts to various power grid wiring structures, and can help users conveniently and quickly convert the current grid data into required grid model data and quickly determine the influence range of power outage substations when the substation is fully stopped and fully turned. , and find out the line that can supply power for the power-off main transformer, which solves the problem of difficult analysis and calculation of the original grid topology.

In the above-mentioned specific embodiments 1 and 2, the transformation method of the high-voltage power grid model used for the calculation of substation full stop and full rotation is provided. Correspondingly, the application also provides the high voltage power grid used for the calculation of substation full stop and full rotation Model Transformer. Since the device embodiment is basically similar to the method embodiment, the description is relatively simple, and for related parts, please refer to part of the description of the method embodiment. The device embodiments described below are illustrative only.

Specific embodiment three

As shown in Fig. 5, an embodiment of the present invention provides a conversion device for a high-voltage power grid model used for substation full stop and full rotation calculation, including:

T connection conversion module 201, for:

When the first end T of the first transmission line is connected to the second transmission line of the same voltage level to obtain power, the first end of the first transmission line is directly connected to the upper main transformer of the second transmission line;

The conversion module 202 at the same level at both ends is used for:

When the two ends of the third transmission line are respectively connected to the high-voltage buses of the third main transformer and the fourth main transformer of the same voltage level, the upper main transformer of the third main transformer becomes the first main transformer and the fourth main transformer The upper-level main transformer becomes the second main transformer, and the third transmission line is split into the fourth transmission line and the fifth transmission line;

The fourth transmission line is connected between the first main transformer and the fourth main transformer; the fifth transmission line is connected between the second main transformer and the third main transformer;

One supply two conversion module 203, used for:

When the eighth transmission line supplies power to two main transformers at the same time, the eighth transmission line is split into the ninth transmission line and the tenth transmission line;

The ninth transmission line is connected between the upper main transformer of the eighth transmission line and a main transformer belonging to one, and the tenth transmission line is connected between the upper main transformer of the eighth transmission line and the other main transformer.

The embodiment of the present invention is based on the principle that "a transmission line strictly corresponds to a superior substation and a subordinate substation", constructs a simple high-voltage power grid model with a clear relationship between the upper and lower levels, and transforms the existing power grid structure into a 110/35kV power grid topology model, which can be used Based on the digitization of the existing substation full-stop and full-turn algorithm, users can convert the existing grid data into the data required for full-stop and full-turn calculation based on this method and fill it into the full-stop calculation tool for full-stop calculation. The embodiment of the present invention adapts to various power grid wiring structures, and can help users conveniently and quickly convert the current grid data into required grid model data and quickly determine the influence range of power outage substations when the substation is fully stopped and fully turned. , and find out the line that can supply power for the power-off main transformer, which solves the problem of difficult analysis and calculation of the original grid topology.

The present invention is described from the perspectives of purpose of use, performance, progress and novelty, etc. Its practical progress has been in line with the function enhancement and use requirements emphasized by the Patent Law. The above descriptions and drawings of the present invention are only The preferred embodiments of the present invention are not limited to the present invention. Therefore, all the structures, devices, and waiting signs of the present invention are similar and identical, that is, all equivalent replacements or modifications made according to the scope of the patent application of the present invention etc., all should belong to the protection scope of the patent application of the present invention.

It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. While the invention has been described to a certain extent, it will be obvious that various changes may be made in various conditions without departing from the spirit and scope of the invention. It is to be understood that the invention is not limited to the described embodiments, but rather falls within the scope of the claims, which include equivalents to each of the elements described. Those skilled in the art can make various other corresponding changes and deformations according to the above-described technical solutions and concepts, and all these changes and deformations should fall within the protection scope of the claims of the present invention.

Claims (10)

1. A method for transforming a high-voltage grid model used for substation full stop and full turn calculation, characterized in that, comprising: T direct transformation steps: When the first end T of the first transmission line is connected to the second transmission line of the same voltage level to obtain power, the first end of the first transmission line is directly connected to the upper main transformer of the second transmission line; Conversion steps at the same level at both ends: When the two ends of the third transmission line are respectively connected to the high-voltage buses of the third main transformer and the fourth main transformer of the same voltage level, the upper main transformer of the third main transformer becomes the first main transformer and the fourth main transformer The upper-level main transformer becomes the second main transformer, and the third transmission line is split into the fourth transmission line and the fifth transmission line; The fourth transmission line is connected between the first main transformer and the fourth main transformer; the fifth transmission line is connected between the second main transformer and the third main transformer; One for two conversion steps: When the eighth transmission line supplies power to two main transformers at the same time, the eighth transmission line is split into the ninth transmission line and the tenth transmission line; The ninth transmission line is connected between the upper main transformer of the eighth transmission line and a main transformer belonging to one, and the tenth transmission line is connected between the upper main transformer of the eighth transmission line and the other main transformer. 2. the conversion method for the high-voltage power grid model that is used for substation full-stop full-turn calculation according to claim 1, is characterized in that, described T-connection conversion step also comprises: According to the main variable capacity of the first transmission line and the second transmission line, the maximum allowable current of the first transmission line and the second transmission line is allocated. 3. the conversion method of the high-voltage grid model that is used for substation full-stop full-turn calculation according to claim 2 is characterized in that, the maximum allowable current of the first transmission line and the second transmission line is respectively: in: I _max1 : the maximum allowable current of the first transmission line; I _max2 : the maximum allowable current of the second transmission line; S ₁ : the main transformer capacity of the first transmission line; S ₂ : the main transformer capacity of the second transmission line; Isafety _-2 : The safety current of the second transmission line. 4. according to claim 1 or 2 described conversion method for the high-voltage grid model of substation full-stop full-rotation calculation, it is characterized in that, described both ends same-level transformation step also comprises: Take the transmission line between the first main transformer and the third main transformer as the sixth transmission line, and allocate the maximum allowable current of the fourth transmission line and the sixth transmission line according to the main transformer capacity of the fourth transmission line and the sixth transmission line; Taking the transmission line between the second main transformer and the fourth main transformer as the seventh transmission line, the maximum allowable current of the fifth transmission line and the seventh transmission line is allocated according to the main transformer capacity of the fifth transmission line and the seventh transmission line. 5. the conversion method of the high-voltage power grid model that is used for substation full-stop full-turn calculation according to claim 4, is characterized in that, The maximum allowable currents of the fourth transmission line and the sixth transmission line are respectively: in: I _max4 : the maximum allowable current of the fourth transmission line; I _max6 : the maximum allowable current of the sixth transmission line; S ₄ : the main transformer capacity of the fourth transmission line; S ₆ : the main transformer capacity of the sixth transmission line; I _safety-6 : the safety current of the sixth transmission line; The maximum allowable currents of the fifth transmission line and the seventh transmission line are respectively: in: I _max5 : the maximum allowable current of the fifth transmission line; I _max7 : the maximum allowable current of the seventh transmission line; S ₅ : the main transformer capacity of the fifth transmission line; S ₇ : the main transformer capacity of the seventh transmission line; Isafety _-7 : The safety current of the seventh transmission line. 6. according to claim 1 or 2 described conversion method for the high-voltage grid model of substation full-stop full-rotation calculation, it is characterized in that, described one supply two conversion step also comprises: According to the main variable capacity of the ninth transmission line and the tenth transmission line, the maximum allowable current of the ninth transmission line and the tenth transmission line is allocated. 7. The conversion method for the high-voltage power grid model used for substation full-stop and full-turn calculation according to claim 6, wherein the maximum allowable currents of the ninth transmission line and the tenth transmission line are respectively: in: I _max9 : the maximum allowable current of the ninth transmission line; I _max10 : the maximum allowable current of the tenth transmission line; S ₉ : the main transformer capacity of the ninth transmission line; S ₁₀ : the main transformer capacity of the tenth transmission line; Isafe _-8 : The safety current of the eighth transmission line. 8. A high-voltage power grid model for calculation of substation full stop and full rotation, characterized in that, the model is used for substation full stop and full rotation by the existing high voltage power grid model according to any one of claims 1-7 The calculated transformation method of the high-voltage grid model is obtained. 9. The high-voltage power grid model for calculating substation full stop and full turn according to claim 8, characterized in that it includes 220kV, 110kV and 35kV substations, and 110kV and 35kV transmission lines. 10. A conversion device for a high-voltage grid model used for substation full stop and full rotation calculation, characterized in that it includes: T-connection conversion module for: When the first end T of the first transmission line is connected to the second transmission line of the same voltage level to obtain power, the first end of the first transmission line is directly connected to the upper main transformer of the second transmission line; Conversion modules at the same level at both ends, used for: When the two ends of the third transmission line are respectively connected to the high-voltage buses of the third main transformer and the fourth main transformer of the same voltage level, the upper main transformer of the third main transformer becomes the first main transformer and the fourth main transformer The upper-level main transformer becomes the second main transformer, and the third transmission line is split into the fourth transmission line and the fifth transmission line; The fourth transmission line is connected between the first main transformer and the fourth main transformer; the fifth transmission line is connected between the second main transformer and the third main transformer; One supply two conversion module, used for: When the eighth transmission line supplies power to two main transformers at the same time, the eighth transmission line is split into the ninth transmission line and the tenth transmission line; The ninth transmission line is connected between the upper main transformer of the eighth transmission line and a main transformer belonging to one, and the tenth transmission line is connected between the upper main transformer of the eighth transmission line and the other main transformer.