CN117498371A - Power distribution network capacity expansion transformation method, device and equipment considering adjustable load - Google Patents
Power distribution network capacity expansion transformation method, device and equipment considering adjustable load Download PDFInfo
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/18—Network design, e.g. design based on topological or interconnect aspects of utility systems, piping, heating ventilation air conditioning [HVAC] or cabling
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2113/00—Details relating to the application field
- G06F2113/04—Power grid distribution networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/10—Power transmission or distribution systems management focussing at grid-level, e.g. load flow analysis, node profile computation, meshed network optimisation, active network management or spinning reserve management
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
Abstract
According to the power distribution network capacity expansion transformation method considering the adjustable load, firstly, the operation period from the current load level to the saturated load level of a power distribution station and the maximum load curve under the whole operation period are obtained, then the maximum load curve of the power distribution station under the adjustable load with different participation proportion is calculated according to the curve, then the capacity expansion transformation scheme under the adjustable load with different participation proportion is obtained based on the maximum load curve under the adjustable load with different participation proportion, finally, the power grid expenditure of the capacity expansion transformation scheme of the power distribution station under the adjustable load with different participation proportion is calculated, the participation proportion with the most obvious power grid expenditure reduction is selected, and the corresponding capacity expansion transformation scheme is the optimal capacity expansion transformation scheme. The design considers the influence of the adjustable load participation response degree on the distribution area when the capacity expansion transformation scheme is optimized, and considers the three demands of economy, equipment utilization rate, stabilized load fluctuation reduction peak power consumption load.
Description
Technical Field
The invention belongs to the technical field of capacity expansion transformation of power distribution networks, and particularly relates to a capacity expansion transformation method, device and equipment for a power distribution network with adjustable load.
Background
At present, the power distribution network planning still meets the load increasing requirement by increasing the power grid construction investment and improving the equipment redundancy, and is difficult to meet the requirements of national economy development, industrial upgrading and high-end manufacturing on high-reliability continuous power supply.
The demand response is a novel supply and demand regulation mode, and can enable a user side controllable load resource to replace a power grid supply side resource, and the demand response refers to that a power user responds according to a price signal or an excitation signal of a power market, changes an original power consumption plan so as to cope with the occurrence of a load peak, stabilizes load fluctuation, promotes new energy consumption and improves the safety and stability of the operation of a power system. For a power grid enterprise, the demand side response not only can cut down peak power load and effectively relieve the electricity limiting pressure when the power supply is tense, but also can improve the utilization rate of power grid equipment, promote the safe and economic operation of a power grid and delay or reduce the investment required by the construction of the power grid. However, under a demand side response adjustment mechanism, how to configure a proper adjustable load participation degree during capacity expansion and transformation of a power grid, so as to control the investment of power grid construction and improve the utilization rate of equipment is a problem to be solved urgently.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a capacity-expanding reconstruction method of a power distribution network, which considers the influence of the participation response degree of adjustable load on a power distribution area and considers the adjustable load.
In order to achieve the above object, the technical scheme of the present invention is as follows:
a method for expanding and reforming a power distribution network in consideration of adjustable loads, the method comprising the steps of:
s1, acquiring an operation period from a current load level to a saturation load level of a power distribution area and a maximum load curve under the whole operation period;
s2, calculating a maximum load curve of the distribution area under the condition that the adjustable loads of different participation proportions are configured according to the data obtained in the step S1, and obtaining a capacity expansion transformation scheme of the distribution area under the condition that the adjustable loads of different participation proportions are configured on the basis of the curve;
s3, calculating the power grid expenditure of the capacity expansion transformation scheme of the power distribution area under the condition that the loads with different participation proportions are adjustable, and selecting the participation proportion with the most obvious power grid expenditure reduction, wherein the corresponding capacity expansion transformation scheme is the optimal capacity expansion transformation scheme.
The step S2 includes:
s21, obtaining a maximum load curve of the distribution transformer area under the adjustable loads of different participation proportions according to the following formula:
P′ max_k％_i ＝P max_i -P reduce_k％_i ；
P reduce_k％_i ＝P max_i ×(1-k％)；
in the above, P' max_k％_i Maximum load of ith year of distribution area when adjustable load participation proportion is k%, P max_i For the maximum load of the ith year of the distribution area when no adjustable load is configured, i=1, 2, …, N is the operational age;
s22, obtaining a capacity expansion transformation scheme of the distribution area under the adjustable loads of different participation proportions according to the maximum load curve obtained in the step S22, wherein the capacity expansion transformation scheme is obtained by carrying out capacity expansion transformation on power grid equipment for a plurality of times under the whole operation period, each time of capacity expansion transformation is carried out when the annual maximum load of the distribution area exceeds the rated capacity of the current transformer, and the capacity expansion transformation is stopped when the annual maximum load reaches the saturated load level of the distribution area.
In step S22, each capacity expansion transformation is performed when the annual maximum load of the distribution area exceeds 1.2 times of the rated capacity of the current transformer.
In step S3, the grid expenditure of the capacity expansion transformation scheme of the distribution transformer area under the adjustable load scenario configured with different participation ratios is calculated according to the following formula:
C respond_k％_i ＝C×P reduce_k％ _i×M；
K i ＝1/(1+r) i ；
in the above, C control laod_k％ Grid expenditure for capacity expansion reconstruction scheme of distribution transformer area under adjustable load participation proportion of k%, C maintain_k％_i For the operation maintenance fee of the ith year of the distribution area when the adjustable load participation proportion is k percent, C install_k％_i C, installing cost for expanding transformer in ith year of power distribution station area when adjustable load participation proportion is k percent respond_k%_i Adjustable load annual response cost for ith year of power distribution area, P reduce_k%_i Adjustable load response potential for power distribution transformer area of the ith year, P max_i For the i-th maximum load of the distribution area, C is the single response cost, M is the number of response times participated in by the adjustable load year, K i And r is the current value coefficient of the ith year, and r is the discount interest rate.
The k% is 0%, 5%, 10%, 15%, 20%, 30%.
The device comprises a data acquisition module, a capacity expansion reconstruction scheme acquisition module and a capacity expansion reconstruction scheme optimization module;
the data acquisition module is used for acquiring the operation period from the current load level to the saturation load level of the distribution transformer area and the maximum load curve under the whole operation period;
the capacity expansion transformation scheme acquisition module is used for calculating a maximum load curve of the distribution transformer area under the condition that the distribution transformer area is configured with the adjustable loads with different participation proportions, and then obtaining a capacity expansion transformation scheme of the distribution transformer area under the condition that the distribution transformer area is configured with the adjustable loads with different participation proportions based on the curve;
the capacity expansion transformation scheme optimizing module is used for calculating the power grid expenditure of the capacity expansion transformation scheme of the distribution transformer area under the condition that the loads with different participation proportions are adjustable, selecting a participation proportion interval with the most obvious power grid expenditure reduction, and the corresponding capacity expansion transformation scheme is the optimal capacity expansion transformation scheme.
The data acquisition module is used for acquiring a maximum load curve of the distribution area under the adjustable loads of different participation proportions, and then acquiring a capacity expansion transformation scheme of the distribution area under the adjustable loads of different participation proportions according to the maximum load curve, wherein the capacity expansion transformation scheme is obtained by carrying out capacity expansion transformation on power grid equipment for a plurality of times under the whole operation life, each time of capacity expansion transformation is carried out when the annual maximum load of the distribution area exceeds the rated capacity of a current transformer, the capacity expansion transformation is stopped when the annual maximum load reaches the saturated load level of the distribution area, and the maximum load curve of the distribution area under the adjustable loads of different participation proportions is obtained according to the following formula:
P′ max_k%_i ＝P max_i -P reduce_k%_i ；
P reduce_k%_i ＝P max_i ×(1-k%)；
in the above, P' max_k％_i Maximum load of ith year of distribution area when adjustable load participation proportion is k%, P max_i For the maximum load of the i-th year of the distribution area when no adjustable load is configured, i=1, 2, …, N is the operational life.
The capacity expansion transformation scheme optimization module is used for calculating the power grid expenditure of the capacity expansion transformation scheme of the power distribution area under the condition of being configured with adjustable loads with different participation proportions according to the following formula:
C respond_k％_i ＝C×P reduce_％_i ×M；
K i ＝1/(1+r) i ；
in the above, C control laod_k% Grid expenditure for capacity expansion reconstruction scheme of distribution transformer area under adjustable load participation proportion of k%, C maintain_k％_i For the operation maintenance fee of the ith year of the distribution area when the adjustable load participation proportion is k percent, C install_k％_i C, installing cost for expanding transformer in ith year of power distribution station area when adjustable load participation proportion is k percent respond_k％_i Adjustable load annual response cost for ith year of power distribution area, P reduce_k％_i Adjustable load response potential for power distribution transformer area of the ith year, P max_i For the i-th maximum load of the distribution area, C is a single responseCost, M is the number of response times of the adjustable load annual participation, K i And r is the current value coefficient of the ith year, and r is the discount interest rate.
An expansion transformation device for a power distribution network, which considers adjustable loads, comprises a processor and a memory;
the memory is used for storing computer program codes and transmitting the computer program codes to the processor;
the processor is used for executing the capacity expansion transformation method of the power distribution network considering the adjustable load according to the instructions in the computer program code.
A computer readable storage medium having stored thereon a computer program which when executed by a processor implements the aforementioned method of expanding a power distribution network taking into account an adjustable load.
Compared with the prior art, the invention has the beneficial effects that:
the invention relates to a capacity expansion transformation method of a power distribution network considering adjustable load, which comprises the steps of firstly obtaining the running period of a power distribution area from the current load level to the saturated load level and the maximum load curve under the whole running period, then calculating the maximum load curve of the power distribution area under the condition that the power distribution area is configured with the adjustable load with different participation proportion according to the curve, obtaining the capacity expansion transformation scheme under the condition that the different participation proportion is adjustable according to the maximum load curve under the condition that the different participation proportion is adjustable, finally calculating the power grid expenditure of the capacity expansion transformation scheme of the power distribution area under the condition that the power distribution area is configured with the adjustable load with different participation proportion, and selecting the participation proportion with the most obvious power grid expenditure reduction, wherein the corresponding capacity expansion transformation scheme is the optimal capacity expansion transformation scheme; the design firstly obtains the capacity expansion transformation scheme under the load with adjustable different participation proportion based on the calculated maximum load curve under the load with adjustable different participation proportion, then compares the power grid expenditure of the capacity expansion transformation scheme under the load with adjustable different participation proportion, and preferably selects the participation proportion and the capacity expansion transformation scheme with optimal economy, thereby taking into account the three demands of economy, equipment utilization rate, and load fluctuation reduction peak electricity load into consideration. Therefore, the invention considers the influence of the adjustable load participation response degree on the distribution area when the capacity expansion transformation scheme is optimized, and can take into account the three demands of economy, equipment utilization rate, and load fluctuation reduction peak electricity load stabilization.
Drawings
Fig. 1 is a flow chart of a capacity expansion transformation method of a power distribution network considering adjustable load.
Fig. 2 is a graph showing the maximum load curve when the distribution area is not configured with an adjustable load in example 1.
Fig. 3 is a capacity expansion modification scheme of the distribution transformer area in embodiment 1 under the adjustable loads of different participation proportions.
Fig. 4 is a schematic structural diagram of the capacity-expansion transformation device for the power distribution network, which considers the adjustable load.
Fig. 5 is a schematic structural diagram of the capacity-expansion transformation device for the power distribution network, which considers the adjustable load.
Detailed Description
The present invention will be described in further detail with reference to the following detailed description and the accompanying drawings.
Referring to fig. 1, a capacity expansion transformation method for a power distribution network considering adjustable load takes a certain power distribution area as a research object, and the method comprises the following steps:
s1, acquiring an operation period from a current load level to a saturation load level of a power distribution area and a maximum load curve under the whole operation period;
the operation period is 27 years, and the maximum load value of each year when no adjustable load is configured is shown in table 1:
table 1 maximum load value for each year when no adjustable load is configured
| Years of operation | Year 0 | Year 1 | Year 2 | Year 3 | Year 4 | Year 5 | Year 6 |
| Annual maximum load | 200.00 | 204.00 | 208.08 | 216.40 | 227.22 | 238.58 | 250.51 |
| Years of operation | Year 7 | Year 8 | Year 9 | Year 10 | Year 11 | Year 12 | Year 13 |
| Annual maximum load | 263.04 | 276.19 | 288.62 | 301.61 | 313.67 | 326.22 | 337.64 |
| Years of operation | Year 14 | Year 15 | Year 16 | Year 17 | Year 18 | Year 19 | Year 20 |
| Annual maximum load | 347.77 | 358.20 | 365.36 | 372.67 | 380.12 | 383.92 | 387.76 |
| Years of operation | 21 st year | Year 22 | Year 23 | Year 24 | Year 25 | Year 26 | Year 27 |
| Annual maximum load | 391.64 | 395.56 | 399.51 | 399.91 | 400.71 | 400.71 | 400.71 |
The maximum load curve under the whole operation period is shown as figure 2, in the figure, the rated capacity of the current transformer in the distribution area is 200kVA, and when the annual maximum load of the area reaches 220kW (4 th year), the transformer in the area is expanded to the rated capacity of 250kVA; when the annual maximum load of the transformer area reaches 275kW (8 th year), expanding the transformer to 300kVA of rated capacity and correspondingly expanding the line capacity of the transformer area; when the annual maximum load of the transformer area reaches 330kW (13 th year), expanding the transformer capacity of the transformer area to 400kVA of rated capacity; the current year operation maintenance cost of the power distribution area is 6000 yuan/year; the installation cost required by the expansion of 250kVA in the first stage is 440000 yuan, and the operation maintenance cost in the corresponding year is 6600 yuan/year; the capacity expansion of the second stage is 300kVA, the required installation cost is 780000 yuan, and the operation maintenance cost of the corresponding year is 11700 yuan; the installation cost required by the expansion of 400kVA in the third stage is 800000 yuan, and the operation maintenance cost in the corresponding year is 12000 yuan;
s2, calculating a maximum load curve of the distribution transformer area under the condition that the adjustable loads with different participation proportions are configured according to the maximum load curve obtained in the step S1, wherein a calculation formula is as follows:
P′ max_k％_i ＝P max_i -P reduce_k％_i ；
P reduce_k％_i ＝P max_i ×(1-k％)；
in the above, P' max_k％_i Maximum load of ith year of distribution area when adjustable load participation proportion is k%, P max_i For the maximum load of the ith year of the distribution area when no adjustable load is configured, i=1, 2, …, N is the operation period, and k% is 0%, 5%, 10%, 15%, 20% and 30%;
the annual maximum load values obtained under the adjustable loads with different participation proportions are shown in table 2:
TABLE 2 annual maximum load values under variable load of different participation ratios
| Years of operation | Adjustable load 5% | Adjustable load 10% | 15% of adjustable load | Adjustable load 20% | Adjustable load 30% |
| Year 0 | 190.00 | 180.00 | 170.00 | 160.00 | 140.00 |
| Year 1 | 193.80 | 183.60 | 173.40 | 163.20 | 142.80 |
| Year 2 | 197.68 | 187.27 | 176.87 | 166.46 | 145.66 |
| Year 3 | 205.58 | 194.76 | 183.94 | 173.12 | 151.48 |
| Year 4 | 215.86 | 204.50 | 193.14 | 181.78 | 159.06 |
| Year 5 | 226.66 | 214.73 | 202.80 | 190.87 | 167.01 |
| Year 6 | 237.99 | 225.46 | 212.94 | 200.41 | 175.36 |
| Year 7 | 249.89 | 236.74 | 223.58 | 210.43 | 184.13 |
| Year 8 | 262.38 | 248.57 | 234.76 | 220.95 | 193.33 |
| Year 9 | 274.19 | 259.76 | 245.33 | 230.90 | 202.03 |
| Year 10 | 286.53 | 271.45 | 256.37 | 241.29 | 211.13 |
| Year 11 | 297.99 | 282.31 | 266.62 | 250.94 | 219.57 |
| Year 12 | 309.91 | 293.60 | 277.29 | 260.98 | 228.35 |
| Year 13 | 320.75 | 303.87 | 286.99 | 270.11 | 236.35 |
| Year 14 | 330.38 | 312.99 | 295.60 | 278.21 | 243.44 |
| Year 15 | 340.29 | 322.38 | 304.47 | 286.56 | 250.74 |
| Year 16 | 347.09 | 328.83 | 310.56 | 292.29 | 255.75 |
| Year 17 | 354.04 | 335.40 | 316.77 | 298.14 | 260.87 |
| Year 18 | 361.12 | 342.11 | 323.10 | 304.10 | 266.09 |
| Year 19 | 364.73 | 345.53 | 326.34 | 307.14 | 268.75 |
| Year 20 | 368.38 | 348.99 | 329.60 | 310.21 | 271.43 |
| 21 st year | 372.06 | 352.48 | 332.90 | 313.31 | 274.15 |
| Year 22 | 375.78 | 356.00 | 336.22 | 316.45 | 276.89 |
| Year 23 | 379.54 | 359.56 | 339.59 | 319.61 | 279.66 |
| Year 24 | 379.92 | 359.92 | 339.93 | 319.93 | 279.94 |
| Year 25 | 380.68 | 360.64 | 340.61 | 320.57 | 280.50 |
| Year 26 | 380.68 | 360.64 | 340.61 | 320.57 | 280.50 |
| Year 27 | 380.68 | 360.64 | 340.61 | 320.57 | 280.50 |
Then carrying out capacity expansion transformation on power grid equipment according to a maximum load curve of the power distribution area under the condition that different participation proportion adjustable loads are configured, and obtaining a capacity expansion transformation scheme of the power distribution area under the condition that different participation proportion adjustable loads are configured, wherein the capacity expansion transformation scheme is that the power grid equipment is subjected to multiple capacity expansion transformation under the whole operation life, each capacity expansion transformation is carried out when the annual maximum load of the power distribution area exceeds the rated capacity of a current transformer by 1.2 times, and the capacity expansion transformation is stopped when the annual maximum load reaches the saturation load level of the power distribution area;
the obtained capacity expansion transformation scheme of the distribution transformer area under the adjustable loads with different participation ratios is shown in fig. 3, and compared with the adjustable load participation ratio of 0%, when the transformer area is configured with the adjustable load, the annual load peak value of the transformer area is reduced, and the investment of power transmission and distribution equipment is delayed and even reduced; when the adjustable load participation proportion is 5%, the capacity expansion transformation is respectively carried out in the 5 th year, the 9 th year and the 14 th year; when the adjustable load participation proportion is 10%, the capacity expansion transformation is respectively carried out in the 6 th year, the 10 th year and the 16 th year; when the adjustable load participation proportion is 15%, carrying out capacity expansion transformation in the 7 th year, the 12 th year and the 21 st year respectively; when the adjustable load is 20%, the capacity expansion transformation is carried out in the 8 th year and the 14 th year respectively; when the adjustable load is 30%, the capacity expansion transformation is carried out in the 11 th year and the 22 nd year respectively; it can be seen that when the adjustable load participation ratio is 20% and 30%, the capacity of the platform area is not required to be expanded to 400kVA without performing the third capacity expansion transformation;
s3, calculating to obtain the power grid expenditure of the capacity expansion transformation scheme of the distribution transformer area under the condition that the capacity expansion transformation scheme is configured with the adjustable loads of different participation proportions according to the following formula, wherein the calculation result is shown in the table 3:
C respond_k％ _i＝C×P reduce_k％ _i×M；
K i ＝1/(1+r) i ；
in the above, C control laod_k％ Grid expenditure for capacity expansion reconstruction scheme of distribution transformer area under adjustable load participation proportion of k%, C maintain_k％_i For the operation maintenance fee of the ith year of the distribution area when the adjustable load participation proportion is k percent, C install_k%_i Is an adjustable load parameterAnd the installation cost of the capacity-expanding transformer is required in the ith year of the distribution area when the proportion is k percent, C respond_k%_i Adjustable load annual response cost for ith year of power distribution area, P reduce_k%_i Adjustable load response potential for power distribution transformer area of the ith year, P max_i For the maximum load of the ith year of the distribution area, C is the single response cost, the simplification process is 0.5 yuan/kWh, M is the number of response times of the adjustable load annual participation, and K is considered according to 1 h/time/year i Taking the current value coefficient of the ith year, r is the discount interest rate, and taking 5%;
TABLE 3 grid expenditure under different participation ratio-adjustable loads
| Adjustable load participation ratio | Electric net expenditure (Yuan) | Duty ratio of 0% for a more adjustable load |
| 0％ | 1442381.13 | —— |
| 5％ | 1376750.75 | 95.45％ |
| 10％ | 1296057.22 | 89.86％ |
| 15％ | 1151590.33 | 79.84％ |
| 20％ | 807792.55 | 56.00％ |
| 30％ | 624039.15 | 43.26％ |
As can be seen from table 3, the power grid expenditure is most obviously reduced when the adjustable load participation proportion is 15% -20%, so that the capacity expansion transformation scheme corresponding to the adjustable load participation proportion is 15% -20% is used as the optimal capacity expansion transformation scheme, and the capacity expansion transformation scheme has obvious improvement on the power grid equipment utilization rate, economy and peak clipping capability.
Example 2:
referring to fig. 4, a capacity expansion transformation device for a power distribution network considering adjustable load comprises a data acquisition module, a capacity expansion transformation scheme acquisition module and a capacity expansion transformation scheme optimization module; the data acquisition module is used for acquiring the operation period from the current load level to the saturation load level of the distribution transformer area and the maximum load curve under the whole operation period; the data acquisition module is used for acquiring a maximum load curve of the distribution area under the adjustable loads of different participation proportions, and then acquiring a capacity expansion transformation scheme of the distribution area under the adjustable loads of different participation proportions according to the maximum load curve, wherein the capacity expansion transformation scheme is obtained by carrying out capacity expansion transformation on power grid equipment for a plurality of times under the whole operation life, each time of capacity expansion transformation is carried out when the annual maximum load of the distribution area exceeds the rated capacity of a current transformer, the capacity expansion transformation is stopped when the annual maximum load reaches the saturation load level of the distribution area, and the maximum load curve of the distribution area under the adjustable loads of different participation proportions is obtained according to the following formula:
P′ max_k％_i ＝P max_i -P reduce_k％_i ；
P reduce_k％_i ＝P max_i ×(1-k％)；
in the above, p' max_k%_i Maximum load of ith year of distribution area when adjustable load participation proportion is k%, P max_i For the maximum load of the ith year of the distribution area when no adjustable load is configured, i=1, 2, …, N is the operation period;
the capacity expansion transformation scheme optimization module is used for calculating the power grid expenditure of the capacity expansion transformation scheme of the distribution transformer area under the condition that the load with different participation proportions is configured according to the following formula, and then selecting a participation proportion interval with the most obvious power grid expenditure reduction, wherein the corresponding capacity expansion transformation scheme is the optimal capacity expansion transformation scheme:
C respond_k％_i ＝0.5P reduce_k％_i ×M；
k i =1/(1+r) i ；
in the above, C control laod _k% Grid expenditure for capacity expansion reconstruction scheme of distribution transformer area under adjustable load participation proportion of k%, C maintain_k%_i For the operation maintenance fee of the ith year of the distribution area when the adjustable load participation proportion is k percent, C install_k％_i C, installing cost for expanding transformer in ith year of power distribution station area when adjustable load participation proportion is k percent respond_k％_i Adjustable load annual response cost for ith year of power distribution area, P reduce_k％_i Adjustable load response potential for power distribution transformer area of the ith year, P max_i For the i-th maximum load of the distribution area, M is the number of response times participated in by the adjustable load year, K i And r is the current value coefficient of the ith year, and r is the discount interest rate.
Example 3:
referring to fig. 5, a capacity expansion transformation device for a power distribution network, which considers adjustable loads, comprises a processor and a memory; the memory is used for storing computer program codes and transmitting the computer program codes to the processor; the processor is configured to execute the power distribution network capacity expansion transformation method taking adjustable load into consideration according to the embodiment 1 according to the instructions in the computer program code;
a computer readable storage medium having stored thereon a computer program which when executed by a processor implements the power distribution network capacity expansion transformation method taking into account adjustable loads as described in embodiment 1.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein. The solutions in the embodiments of the present application may be implemented in various computer languages, for example, object-oriented programming language Java, and an transliterated scripting language JavaScript, etc.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the application.
Claims (10)
1. A power distribution network capacity expansion transformation method considering adjustable load is characterized in that:
the method comprises the following steps:
s1, acquiring an operation period from a current load level to a saturation load level of a power distribution area and a maximum load curve under the whole operation period;
s2, calculating a maximum load curve of the distribution area under the condition that the adjustable loads of different participation proportions are configured according to the data obtained in the step S1, and obtaining a capacity expansion transformation scheme of the distribution area under the condition that the adjustable loads of different participation proportions are configured on the basis of the curve;
and S3, calculating the power grid expenditure of the capacity expansion transformation scheme of the power distribution area under the condition that the loads with different participation proportions are adjustable, and selecting a participation proportion interval with the most obvious power grid expenditure reduction, wherein the corresponding capacity expansion transformation scheme is the optimal capacity expansion transformation scheme.
2. The capacity expansion transformation method for the power distribution network considering adjustable load according to claim 1, wherein the method comprises the following steps:
the step S2 includes:
s21, obtaining a maximum load curve of the distribution transformer area under the adjustable loads of different participation proportions according to the following formula:
P′ max_k％_i ＝P max_i -P reduce_k％_i ；
P reduce_k%_i ＝P max_i ×(1-k％)；
in the above, P' max_k％_i Maximum load of ith year of distribution area when adjustable load participation proportion is k%, P max_i For the maximum load of the ith year of the distribution area when no adjustable load is configured, i=1, 2, …, N is the operational age;
s22, obtaining a capacity expansion transformation scheme of the distribution area under the adjustable loads of different participation proportions according to the maximum load curve obtained in the step S22, wherein the capacity expansion transformation scheme is obtained by carrying out capacity expansion transformation on power grid equipment for a plurality of times under the whole operation period, each time of capacity expansion transformation is carried out when the annual maximum load of the distribution area exceeds the rated capacity of the current transformer, and the capacity expansion transformation is stopped when the annual maximum load reaches the saturated load level of the distribution area.
3. The capacity expansion transformation method for the power distribution network considering adjustable load according to claim 2, wherein the method comprises the following steps:
in step S22, each capacity expansion transformation is performed when the annual maximum load of the distribution area exceeds 1.2 times of the rated capacity of the current transformer.
4. A method for expanding and reforming a power distribution network in consideration of adjustable load according to claim 3, wherein:
in step S3, the grid expenditure of the capacity expansion transformation scheme of the distribution transformer area under the adjustable load scenario configured with different participation ratios is calculated according to the following formula:
C respond_k％_i ＝C×P reduce_k％_i ×M；
K i ＝1/(1+r) i ；
in the above, C control laod_k％ Grid expenditure for capacity expansion reconstruction scheme of distribution transformer area under adjustable load participation proportion of k%, C maintain_k％_i For the operation maintenance fee of the ith year of the distribution area when the adjustable load participation proportion is k percent, C install_k％_i C, installing cost for expanding transformer in ith year of power distribution station area when adjustable load participation proportion is k percent respond_k％_i Adjustable load annual response cost for ith year of power distribution area, P reduce_k％_i Adjustable load response potential for power distribution transformer area of the ith year, P max_i For the i-th maximum load of the distribution area, C is the single response cost, M is the number of response times participated in by the adjustable load year, K i And r is the current value coefficient of the ith year, and r is the discount interest rate.
5. The capacity expansion transformation method for the power distribution network considering adjustable load according to claim 2, wherein the method comprises the following steps:
the k% is 0%, 5%, 10%, 15%, 20%, 30%.
6. The utility model provides a distribution network dilatation transformation device of adjustable load of consideration, its characterized in that:
the device comprises a data acquisition module, a capacity expansion transformation scheme acquisition module and a capacity expansion transformation scheme optimization module;
the data acquisition module is used for acquiring the operation period from the current load level to the saturation load level of the distribution transformer area and the maximum load curve under the whole operation period;
the capacity expansion transformation scheme acquisition module is used for calculating a maximum load curve of the distribution transformer area under the condition that the distribution transformer area is configured with the adjustable loads with different participation proportions, and then obtaining a capacity expansion transformation scheme of the distribution transformer area under the condition that the distribution transformer area is configured with the adjustable loads with different participation proportions based on the curve;
the capacity expansion transformation scheme optimizing module is used for calculating the power grid expenditure of the capacity expansion transformation scheme of the distribution transformer area under the condition that the loads with different participation proportions are adjustable, selecting a participation proportion interval with the most obvious power grid expenditure reduction, and the corresponding capacity expansion transformation scheme is the optimal capacity expansion transformation scheme.
7. The capacity expansion transformation device for the power distribution network considering adjustable load according to claim 6, wherein:
the data acquisition module is used for acquiring a maximum load curve of the distribution area under the adjustable loads of different participation proportions, and then acquiring a capacity expansion transformation scheme of the distribution area under the adjustable loads of different participation proportions according to the maximum load curve, wherein the capacity expansion transformation scheme is obtained by carrying out capacity expansion transformation on power grid equipment for a plurality of times under the whole operation life, each time of capacity expansion transformation is carried out when the annual maximum load of the distribution area exceeds the rated capacity of a current transformer, the capacity expansion transformation is stopped when the annual maximum load reaches the saturation load level of the distribution area, and the maximum load curve of the distribution area under the adjustable loads of different participation proportions is obtained according to the following formula:
P′ max_k%_i ＝P max_i -P reduce_k％_i ；
P reduce_k％_i ＝P max_i ×(1-k％)；
in the above, P' max_k％_i Maximum load of ith year of distribution area when adjustable load participation proportion is k%, P max_i For the maximum load of the i-th year of the distribution area when no adjustable load is configured, i=1, 2, …, N is the operational period.
8. The capacity expansion transformation device for the power distribution network taking adjustable load into consideration as claimed in claim 7, wherein:
the capacity expansion transformation scheme optimization module is used for calculating the power grid expenditure of the capacity expansion transformation scheme of the power distribution area under the condition of being configured with adjustable loads with different participation proportions according to the following formula:
C respond_k％_i ＝C×P reduce_k％_i ×M；
K i ＝1/(1+r) i ；
in the above, C control laod_k％ Grid expenditure for capacity expansion reconstruction scheme of distribution transformer area under adjustable load participation proportion of k%, C maintain_k％_i For the operation maintenance fee of the ith year of the distribution area when the adjustable load participation proportion is k percent, C install_k%_i C, installing cost for expanding transformer in ith year of power distribution station area when adjustable load participation proportion is k percent respond_k％_i Adjustable load annual response cost for ith year of power distribution area, P reduce_k％_i Adjustable load response potential for power distribution transformer area of the ith year, P max_i For the i-th maximum load of the distribution area, C is the single response cost, M is the number of response times participated in by the adjustable load year, K i And r is the current value coefficient of the ith year, and r is the discount interest rate.
9. The utility model provides a distribution network dilatation transformation equipment of adjustable load of consideration which characterized in that:
the apparatus includes a processor and a memory;
the memory is used for storing computer program codes and transmitting the computer program codes to the processor;
the processor is configured to execute the method for expanding and transforming the power distribution network according to any one of claims 1-5, wherein the method is based on instructions in the computer program code.
10. A computer-readable storage medium, characterized by:
the computer readable storage medium stores a computer program which, when executed by a processor, implements the method for expanding and transforming a power distribution network according to any one of claims 1 to 5, wherein the load is adjustable.
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| CN202311244846.5A CN117498371A (en) | 2023-09-26 | 2023-09-26 | Power distribution network capacity expansion transformation method, device and equipment considering adjustable load |
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| CN202311244846.5A CN117498371A (en) | 2023-09-26 | 2023-09-26 | Power distribution network capacity expansion transformation method, device and equipment considering adjustable load |
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