CN112350334B - Power supply method of comprehensive parking lot charging facility - Google Patents
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Abstract
The invention discloses a power supply method of a comprehensive parking lot charging facility, which comprises the following steps: step S10, generating a typical daily load curve of the comprehensive parking lot according to the service vehicles of the comprehensive parking lot, the type, the power and the quantity of the charging piles; step S11, generating a comprehensive parking lot production year and distant view year grid daily load curve and power supply capacity; step S12, evaluating the long-range power supply margin; step S13, evaluating the power supply margin of the production year; step S14, performing controllable load evaluation; and S15, generating a comprehensive yard power supply scheme suggestion according to the evaluation result. By implementing the method and the device, a reasonable power supply scheme suggestion can be generated, the power supply requirement is met, and the equipment utilization rate and the land utilization efficiency are improved.
Description
Technical Field
The invention relates to the field of power system application, in particular to a power supply method of a comprehensive parking lot charging facility.
Background
In recent years, the electric automobile industry is rapidly developed under the promotion of national industrial policies, energy conservation, emission reduction and the like, but with the increase of the number of electric automobiles, the problems of shortage of charging places, delay in construction of charging facilities and the like appear. In order to save urban land and accelerate the construction of charging facilities, a three-dimensional comprehensive parking lot is planned, namely, an electric vehicle charging station is constructed in a three-dimensional mode in a relatively concentrated land, so that the charging requirements of various types of electric vehicles such as buses, taxies, social vehicles and the like are met, and the land utilization efficiency is improved. The land occupation of a large-scale comprehensive parking lot can reach 4 ten thousand square meters, and the electricity utilization telegraph is over 10 thousand volt-ampere. With the investment of the comprehensive parking lot, the centralized charging of the charging facilities can bring certain impact to the power grid, and the power supply capacity of the local power grid is tested.
According to the conventional standard, a user reporting a load exceeding a certain value (such as 4 ten thousand volt-ampere) needs to configure a transformer substation to solve the power supply problem, if the load is smaller than the fixed value, a medium-voltage distribution network access mode is adopted, but the power consumption time period of the comprehensive yard is different from the conventional load to a certain extent, and a 'one-off' power supply scheme is adopted, so that the influence of overestimation on a power grid is easily caused, the utilization rate of equipment of a new station is low, the influence on the power grid can be underestimated, and the power supply tension of a near area is caused. How to formulate high-efficient power supply scheme in order to satisfy power supply demand, promote equipment utilization ratio and land use efficiency simultaneously is the problem that needs to solve urgently.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a power supply method of a comprehensive parking lot charging facility, which can generate a reasonable power supply scheme proposal, meet the power supply requirement and simultaneously improve the equipment utilization rate and the land utilization efficiency.
The technical scheme adopted by the invention is that a power supply method of a comprehensive parking lot charging facility is provided, which comprises the following steps:
step S10, generating a typical daily load curve S1 of the comprehensive parking lot according to the service vehicles of the comprehensive parking lot, the type, the power and the quantity of the charging piles;
step S11, generating a typical daily load curve S2 of the high-voltage distribution network grid of the integrated parking lot production year according to the integrated parking lot production time and the high-voltage distribution network grid of the integrated parking lot production year Put into production And power supply capacity W of main transformer in grid Put into production Typical daily load curve S2 of high-voltage distribution network grid in distant view year Distant view And power supply capacity W of main transformer in grid Distant view ；
Step S12, the power supply margin of the distant view is evaluated, and a typical daily load curve S2 of the high-voltage distribution network grid corresponding to the distant view year is used Distant view And the typical daily load curve S1 of the comprehensive parking lot Distant view Overlapping to generate a total daily load curve S of the long-term view annual grid Distant view Calculating the corresponding daily maximum load P maxs-perspective According to said daily maximum load P maxs-perspective Determining whether a future time requires a new timeIncreasing the capacity of the transformer substation;
step S13, carrying out power supply margin evaluation of the production year, and carrying out typical daily load curve S2 of the high-voltage distribution network grid corresponding to the production year Put into production And the typical daily load curve S1 of the comprehensive parking lot Put into production Overlapping to generate a total daily load curve S of the production year grid Put into production Calculating the corresponding first day maximum load P maxs-production Determining whether the capacity of the newly increased substation is needed in the near future according to the maximum load on the first day;
step S14, performing controllable load evaluation, and generating a controllable daily load curve S3 of the comprehensive parking lot according to the reducible load quantity of the comprehensive parking lot; total daily load curve S of production year grid Put into production Superposed with the controllable daily load curve S3 to generate a load curve K after the on-production year grid control Put into production Calculating the corresponding second-day maximum load P maxk-commissioning Determining whether the capacity of the newly increased transformer substation is needed in the near future according to the maximum load of the second day;
step S15, generating a comprehensive yard power supply scheme suggestion according to the evaluation results of the steps S12 to S14, wherein the comprehensive yard power supply scheme at least comprises one of the following items:
synchronously constructing a transformer substation by combining the comprehensive yard;
a main transformer is not built in the near term, and the construction is carried out according to the load in the long term;
newly adding planned substation distribution points in advance;
and (4) determining whether orderly charging is needed or not by utilizing the power supply of the existing transformer substation.
Preferably, in the step S10, the accuracy of the load curve is acquired once or more in half an hour.
Preferably, the step S12 further includes:
if the total load of the distant view year grid is S Distant view Corresponding daily maximum load P maxs-perspective Grid power supply capability W ≦ Distant view Determining that the capacity of the transformer substation does not need to be newly increased in the long term;
if P is maxs-perspective >W Distant view And determining that the capacity of the newly added substation is required in the long term.
Preferably, the step S13 further includes:
if the total load of the production year grid is S Put into production Corresponding daily maximum load P maxs-production Grid power supply capacity W at production year Put into production If yes, determining that the capacity of the transformer substation does not need to be newly increased in the near future, and the process goes to step S15;
if P maxs-production >W Put into production The flow advances to step S14.
Preferably, the step S14 further includes:
if P maxk-commissioning ≦W Put into production Determining that the capacity of the transformer substation does not need to be increased recently, but orderly charging is needed to be carried out, and controlling the peak load;
if P is maxk-commissioning >W Put into production And determining that the capacity of the newly added substation is required recently.
Preferably, the step S15 further includes:
in the evaluation result, if newly increased transformer substation capacity is recommended in both the distant view and the production year, the power supply scheme is to combine the comprehensive yard to synchronously construct a transformer substation;
if only a distant view suggests newly increasing the capacity of the transformer substation, the power supply scheme reserves transformer substation land for combining the comprehensive vehicle yard, a main transformer is not built in the near future, and the distant view is built according to load development;
if the newly increased capacity of the transformer substation is only recently suggested, the power supply scheme is that planned transformer substation distribution points are newly increased in advance in a high-voltage distribution network grid of the comprehensive vehicle yard, including new construction or extension;
and if the capacity of the newly-added transformer substation is not needed in the near and long periods, the power supply scheme is to utilize the existing transformer substation for power supply and provide whether ordered charging is needed or not according to the evaluation result.
The implementation of the invention has the following beneficial effects:
the invention provides a power supply method of a comprehensive parking lot charging facility, which is based on gridding analysis and planning, considers controllable load influence, comprehensively analyzes factors such as near-term and far-term load development and power grid development and generates a reasonable power supply scheme suggestion. By implementing the invention, the power supply requirement of the three-dimensional comprehensive parking lot can be met, and the equipment utilization rate and the land utilization efficiency can be improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is within the scope of the present invention for those skilled in the art to obtain other drawings based on the drawings without inventive labor.
Fig. 1 is a schematic main flow chart of an embodiment of a power supply method for an integrated yard charging facility according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In order to make the objects, technical solutions and advantages of the present invention more clearly understood by those skilled in the art, the present invention is further explained below with reference to the accompanying drawings and examples.
Referring to fig. 1, a main flow diagram of an embodiment of a method for supplying power to an integrated yard charging facility according to the present invention is shown. In this embodiment, the method for supplying power to the integrated yard charging facility includes the following steps:
step S10, generating a typical daily load curve S1 of the comprehensive parking lot according to the service vehicles of the comprehensive parking lot, the type, the power and the quantity of the charging piles;
for example, for a certain comprehensive parking lot, the daytime service vehicles are mainly electric taxis, logistics vehicles, sanitation vehicles, private cars and a small number of public buses for charging, and the night service vehicles are mainly public buses and electric taxis. Taking bus charging on a typical day (generally, normal working days) as an example, in the night 23. Similarly, for various different service vehicles, corresponding charging curves are predicted and superposed to obtain a comprehensive yard daily load curve;
more preferably, the charging load is influenced by the charging price, and the charging peak-valley average price can change by half an hour, so that the accuracy of the load curve at 48 points (one point in half an hour) and above is better.
Step S11, generating a typical daily load curve S2 of the high-voltage distribution network grid of the production year of the comprehensive parking lot according to the production time of the comprehensive parking lot and the high-voltage distribution network grid of the production year of the comprehensive parking lot Put into production And power supply capacity W of main transformer in grid Put into production Typical daily load curve S2 of high-voltage distribution network grid in distant view year Distant view And the power supply capacity W of the main transformer in the grid Distant view ；
A gridding concept is gradually established in urban power distribution networks of 110kV and below, a complex power distribution network is divided into a plurality of geographically and electrically relatively independent power supply grids, and the grids are used as units for distribution network management. For a high-voltage distribution network, administrative divisions, main roads and the like can be combined for division, 3-4 substations are contained in one grid, the power supply ranges of the substations in the same grid are close, and the mutual support capacity is strong. In order to meet the power supply requirement of the comprehensive parking lot, analysis needs to be carried out from a high-voltage distribution network grid where the comprehensive parking lot is located.
For the high-voltage distribution network grid of the comprehensive vehicle yard, according to a load density method, a prospective typical daily load curve is predicted by using land properties and building areas, all transformer stations in the grid are considered according to the scale of a final main transformer, and a prospective typical daily load curve S2 of the prospective annual grid corresponding to the grid of the comprehensive vehicle yard is obtained Distant view And simultaneously, the main transformer power supply capacity W in the grid is calculated by combining the total main transformer capacity and the reasonable load rate of the medium-voltage distribution network from voltage reduction in the distant view grid Distant view (ii) a The comprehensive network load of the production year of the parking lot can be predicted according to the methods of the existing load curve, the load reporting method, the growth rate method and the like, and the typical daily load curve S2 of the corresponding production year network is obtained by combining the near-middle-stage substation planning Put into production At the same timeCalculating the power supply capacity W of the main transformer in the grid by combining the total main capacity and the reasonable load rate of the main transformer of the distribution network with the voltage reduction to the medium voltage in the production year grid Put into production 。
Step S12, the power supply margin of the distant view is evaluated, and a typical daily load curve S2 of the high-voltage distribution network grid corresponding to the distant view year is used Distant view And the typical daily load curve S1 of the comprehensive parking lot Distant view Overlapping to generate a total daily load curve S of the distant view annual grid Distant view Calculating the corresponding daily maximum load P maxs-perspective ：
Specifically, if the prospective year grid total load S Distant view Corresponding daily maximum load P maxs-perspective Grid power supply capability W ≦ Distant view The power supply capacity of the comprehensive yard is satisfied by the set point capacity of the prospective planning transformer substation, and the capacity of the transformer substation is determined not to be newly added in the long term;
if P is maxs-perspective >W Distant view And the remote view substation set point capacity can not meet the power supply requirement of the comprehensive yard, and the newly increased substation capacity required in the remote period is determined.
Step S13, carrying out power supply margin evaluation of the production year, and carrying out typical daily load curve S2 of the high-voltage distribution network grid corresponding to the production year Put into production And the typical daily load curve S1 of the comprehensive parking lot Put into production Overlapping to generate a total daily load curve S of the production year grid Put into production Calculating the corresponding first day maximum load P maxs-production ：
Wherein if the year of production is put into operation, the total grid load S Put into production Corresponding first day maximum load P maxs-production Grid power supply capacity W at production year Put into production If the planned substation distribution point capacity in the production year meets the comprehensive yard power supply requirement, the newly increased substation capacity is not needed in the near term, and the step S15 is carried out;
if P is maxs-production >W Put into production And if the distribution point capacity of the transformer station in the production year cannot meet the power supply requirement of the comprehensive parking lot, the step S14 is carried out.
Step S14, controllable load evaluation is carried out, and a controllable daily load curve S3 of the comprehensive parking lot is generated according to the reducible load quantity of the comprehensive parking lot; total daily load curve S of production year grid Put into production Superposed with the controllable daily load curve S3 to generate a load curve K after the production year grid control Put into production Calculating the corresponding second-day maximum load P maxk-commissioning If P is maxk-commissioning ≦W Put into production In the near term, the capacity of the transformer substation does not need to be increased newly, but orderly charging is needed to be carried out, and the peak load is controlled; if P is maxk-commissioning >W Put into production Newly increasing the capacity of the transformer substation in the near term;
it can be understood that the yard can smooth the charging demand and reduce the peak load by using the ordered charging strategy, taking the bus as an example, the charging is carried out in the following steps of 23-00 in the evening; however, the ordered charging is not suitable for influencing the charging quantity, and is not suitable for shifting across the electricity price time period, for example, a user plans to charge in a valley period to save charging fee, and is not suitable for shifting to a flat period or a peak period;
the reducible load amount can be formulated in advance by a vehicle yard side agreement, a demand side response and the like, and a comprehensive vehicle yard controllable daily load curve S3 is generated according to the reducible load amount corresponding to the 48 points; if the parking lot does not control the charging load, S3 is a straight line with 48 point values all being 0;
the development of the distant view load has certain uncertainty, and a certain margin should be reserved for the power supply capacity, so that the influence of the controllable load of the train yard is not considered in the distant view in the embodiment.
Step S15, generating a comprehensive yard power supply scheme suggestion according to the evaluation results of the steps S12 to S14, wherein the comprehensive yard power supply scheme at least comprises one of the following items:
synchronously constructing a transformer substation by combining the comprehensive yard;
a main transformer is not built in the near term, and the construction is carried out according to the load in the long term;
newly adding planned substation distribution points in advance;
and (4) determining whether ordered charging is required by utilizing the power supply of the existing transformer substation.
Specifically, if newly increased transformer substation capacity is recommended in the evaluation result in both the long-term view and the production year, the power supply scheme is to combine the comprehensive yard to synchronously construct the transformer substation;
if only the future suggests newly increasing the capacity of the transformer substation, the power supply scheme reserves the land of the transformer substation for combining with the comprehensive vehicle yard, and a main transformer is not built in the near term and is built according to the load development in the long term;
if the newly increased transformer substation capacity is only recently recommended, the power supply scheme is that planned transformer substation distribution points are newly increased in advance in a high-voltage distribution network grid of the comprehensive vehicle yard, including new construction or extension;
and if the capacity of the newly-added transformer substation is not needed in the near and long periods, the power supply scheme is to utilize the existing transformer substation for power supply and provide whether ordered charging is needed or not according to the evaluation result.
The implementation of the invention has the following beneficial effects:
the invention provides a power supply method of a comprehensive parking lot charging facility, which is based on gridding analysis and planning, considers controllable load influence, comprehensively analyzes factors such as near-term and far-term load development and power grid development and generates a reasonable power supply scheme suggestion. By implementing the invention, the power supply requirement of the three-dimensional comprehensive parking lot can be met, and the equipment utilization rate and the land utilization efficiency can be improved.
While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not to be limited to the disclosed embodiment, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (6)
1. A power supply method for an integrated yard charging facility, comprising the steps of:
step S10, generating a typical daily load curve S1 of the comprehensive parking lot according to the type, power and quantity of charging piles corresponding to various service vehicles of the comprehensive parking lot;
step S11, generating a typical daily load curve S2 of the high-voltage distribution network grid of the production year of the comprehensive parking lot according to the production time of the comprehensive parking lot and the high-voltage distribution network grid of the production year of the comprehensive parking lot Put into production And the power supply capacity W of the main transformer in the grid Put into production Typical daily load curve S2 of high-voltage distribution network grid in distant view year Distant view And the power supply capacity W of the main transformer in the grid Distant view ；
Step S12, long-range view power supply margin evaluation is carried out, and a high-voltage distribution network grid typical daily load curve S2 corresponding to a long-range view year is obtained Distant view Comprehensive vehicle yard typical daily load curve S1 corresponding to distant view year Distant view Overlapping to generate a total daily load curve S of the distant view annual grid Distant view Calculating the corresponding daily maximum load P maxs-perspective According to said daily maximum load P maxs-perspective Determining whether the capacity of the transformer substation needs to be increased in a long term;
step S13, carrying out power supply margin evaluation of the production year, and carrying out typical daily load curve S2 of the high-voltage distribution network grid corresponding to the production year Put into production And the typical daily load curve S1 of the comprehensive parking lot Put into production Overlapping to generate a total daily load curve S of the production year grid Put into production Calculating the corresponding first day maximum load P maxs-production Determining whether the capacity of the newly increased substation is needed in the near future according to the maximum load on the first day;
step S14, controllable load evaluation is carried out, and a controllable daily load curve S3 of the comprehensive parking lot is generated according to the reducible load quantity of the comprehensive parking lot; total daily load curve S of production year grid Put into production Superposed with the controllable daily load curve S3 to generate a load curve K after the on-production year grid control Put into production Calculating the corresponding second day maximum load P maxk-commissioning Determining whether the capacity of the newly increased transformer substation is needed or not in the near future according to the maximum load of the second day;
step S15, generating a comprehensive yard power supply scheme suggestion according to the evaluation results of the steps S12 to S14, wherein the comprehensive yard power supply scheme at least comprises one of the following items:
synchronously constructing a transformer substation by combining the comprehensive yard;
a main transformer is not built in the near term, and the construction is carried out according to the load in the long term;
newly adding planned substation distribution points in advance;
and (4) determining whether ordered charging is required by utilizing the power supply of the existing transformer substation.
2. The method of claim 1, wherein in step S10, the accuracy of the load profile is such that one or more data acquisitions are made within a half hour.
3. The method of claim 2, wherein the step S12 further comprises: if the total daily load curve S of the distant view year grid Distant view Corresponding daily maximum load P maxs-perspective Power supply capacity W of main transformer in grid is less than or equal to Distant view Determining that the capacity of the transformer substation does not need to be newly increased in the long term;
if P maxs-perspective >W Distant view And determining that the capacity of the newly added substation is required in the long term.
4. The method of claim 3, wherein the step S13 further comprises:
if the production year is the total daily load curve S of the grid Put into production Corresponding first day maximum load P maxs-commissioning Main transformer power supply capacity W in production year less than or equal to Put into production If yes, determining that the capacity of the transformer substation does not need to be newly increased in the near future, and the process goes to step S15;
if the first day maximum load P maxs-commissioning >W Put into production The flow advances to step S14.
5. The method of claim 4, wherein the step S14 further comprises:
if the second day maximum load P maxk-commissioning ≤W Put into production Determining that the capacity of the transformer substation does not need to be increased newly in the near term, but orderly charging is needed to be carried out, and controlling the peak load;
if the second day maximum load P maxk-commissioning >W Put into production And determining that the capacity of the newly added substation is required recently.
6. The method of claim 5, wherein the step S15 further comprises:
in the evaluation result, if newly increased transformer substation capacity is recommended in both the distant view and the production year, the power supply scheme is to combine the comprehensive yard to synchronously construct the transformer substation;
if only the future suggests newly increasing the capacity of the transformer substation, the power supply scheme reserves the land of the transformer substation for combining with the comprehensive vehicle yard, and a main transformer is not built in the near term and is built according to the load development in the long term;
if the newly increased transformer substation capacity is only recently recommended, the power supply scheme is that planned transformer substation distribution points are newly increased in advance in a high-voltage distribution network grid of the comprehensive vehicle yard, including new construction or extension;
if the capacity of the transformer substation does not need to be increased in the near and long periods, the power supply scheme is to utilize the existing transformer substation for power supply and provide whether ordered charging is needed or not according to the evaluation result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011270631.7A CN112350334B (en) | 2020-11-13 | 2020-11-13 | Power supply method of comprehensive parking lot charging facility |
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