An orderly charging control method for electric vehicles in a residential community

Abstract

An orderly charging control method for electric vehicles in a residential community: evaluate the dynamic surplus capacity of the power supply system in the residential community, formulate a dynamic charging plan for electric vehicles according to the time-capacity characteristics of the dynamic surplus capacity. Guide users with different charging demands to enter different charging sequence levels through price differences. Through the load forecasting module, predict the community distribution network system, residential electricity consumption and the access volume of electric vehicles in advance, calculate the expected total charging duration of users in different sequence charging levels, and facilitate users to select appropriate sequence levels according to their needs. Control the electric vehicle charging piles to perform actions such as accessing, waiting, exiting, and reconnecting to the distribution network through the orderly charging control module, so as to match the charging load of electric vehicles with the dynamic surplus capacity of the power supply system. The present invention utilizes the existing power supply and distribution system resources in the residential community, solves the problem of difficult charging of electric vehicles in existing residential communities, and reduces the redundant investment in the power supply and distribution system.

Description

Technical Field

[0001] The present invention relates to a method for controlling the orderly charging of electric vehicles in a residential community. Background Art

[0002] In the application process of electric vehicles, due to the large charging capacity demand of electric vehicles, in the already-built residential communities, the problem of difficult charging often occurs. The main reasons for the difficult charging of electric vehicles in existing communities are that the newly added electric vehicle load is often hundreds or even thousands of kilowatts, while the original power supply and distribution system is often designed based on the conventional load of residents and there is not much surplus capacity available. On the other hand, there is often no vacant site and space in the community to newly add a dedicated power transformation and distribution system for charging.

[0003] The limitation of charging conditions makes the users of the already-purchased electric vehicles feel inconvenient to use, and potential electric vehicle users will also be discouraged due to the inconvenient charging. Therefore, the charging conditions of electric vehicles in residential communities indirectly restrict the popularization and promotion of electric vehicles. Summary of the Invention

[0004] To solve the above problems, an investigation and research on the distribution systems of sample communities in different provinces and cities in the country is carried out. The data shows that the load characteristics of the distribution systems of mature residential communities are as follows: the daily load generally includes two peak periods (a small peak period and a large peak period) and a trough period. Generally, the large peak is concentrated in the evening period. According to different seasons, the average power load in the trough period is about 0.25 - 0.55 times that in the peak period.

[0005] The national standard requires that the expected load rate of the transformer in the design selection be considered not to exceed 85%. According to the investigation data, the minimum actual load rate of the transformer in the sample community is 9.3%, and the maximum is 73.48%. The sample statistical data shows that the load rate of the transformer in the off-peak period of electricity consumption generally does not exceed 26%; in the peak period of electricity consumption, the load rate of the transformer generally does not exceed 60%, and a small number of transformers exceed 70%.

[0006] From the perspective of the product, when the working temperature is suitable, it is feasible for the transformer to work near full load for a long time. For electric vehicles, the charging load belongs to a non-instantaneous load, and a time-sharing and grouped power supply method can be adopted for it.

[0007] Based on the above conditions, it can be known that for most residential communities, it is feasible to use the dynamic surplus capacity of their existing power transformation and distribution systems to provide charging for electric vehicles.

[0008] The technical problem to be solved by the present invention is to provide an orderly charging control method for electric vehicles in a residential community. The orderly charging control system for electric vehicles includes a load prediction module, a load sorting module, an orderly charging control module, a platform management system, and a mobile phone client. The load prediction module, the load sorting module, the orderly charging control module, and the mobile phone client are respectively communicatively connected to the platform management system. The orderly charging control method for electric vehicles includes the following steps:

[0009] 1. Statistically analyze the capacity and location of each transformer in the residential community, and statistically analyze the load rate parameters of each transformer in different seasons and at different times in recent years, so as to obtain the dynamic surplus capacity value of each transformer based on time parameters.

[0010] 2. During the statistical process, if it is found that the installation time of the community's power transformation and distribution equipment is relatively early, each power distribution device is close to the phase-out period, or the community's power transformation and distribution system has been in a full-load or even overloaded state for a long time, it is not recommended to use the original community power supply system to charge electric vehicles.

[0011] 3. For each transformer i in the residential community, determine the number L of AC charging piles that can be connected to the transformer i simultaneously according to the following formula i : L i = (St × X i / Y), where St is the dynamic surplus capacity value of the transformer, in kVA, Y is the rated power of the AC charging pile, in kW, and X i is the power factor compensation value on the low-voltage side of the transformer.

[0012] 4. Divide the above-mentioned L i AC charging piles into m areas, each area contains n AC charging piles, each area is provided with a main line loop connected to the transformer i, and a distribution main box is provided at the end of each main line loop. Each distribution main box is provided with n branch outgoing line loops respectively connected to n charging piles.

[0013] 5. Set a temperature sensor at the transformer winding, a voltage transformer and a current transformer at the main breaker on the low-voltage side of the transformer; set a voltage transformer at the busbar of each distribution main box, and set current transformers at the main incoming breaker of the distribution main box and the breaker of each branch outgoing line loop; set a contactor in each branch outgoing line loop.

[0014] 6. The control method of the present invention mainly uses the load prediction module to guide users to select different charging sequence levels. The orderly charging control module controls the access, waiting, exit, re-access, etc. of the electric vehicle charging piles through the contactors arranged in each branch line loop, and finally realizes the matching of the charging load of the community's electric vehicles and the dynamic surplus capacity of the community's power supply system.

[0015] 7. The load forecasting module is responsible for collecting, counting, and analyzing the load patterns of community residents, the charging load patterns of electric vehicles, and their development trends, providing a basis for managers to formulate charging rules and reference data for the charging durations of different sequence-level charging modes in real time.

[0016] 8. The load forecasting module provides and displays in real time to the mobile phone client the distribution of charging spaces, the current availability of charging spaces, the prices of different charging sequence levels, and the estimated charging durations. Different levels of demand users are guided by prices to select different charging sequence levels.

[0017] 9. The load sorting module classifies regular user levels into charging sequence levels of 1, 2, and 3. To cope with emergency charging needs, a special level sequence is additionally set. When connecting to a charging pile, in the order of levels, the special, 1, 2, and 3-level charging sequence charging piles are connected in turn. The sorting strategy within each same level adopts the first-come, first-served method. When a charging pile exits, in the order of levels, the 3, 2, 2-level charging sequence charging piles exit in turn. The special level charging pile only exits when a system failure occurs. The load sorting module should be able to retain the charging sequence and queuing information at the last moment under any circumstances to facilitate continuing the previous queuing order when reconnecting or recovering from a failure.

[0018] 10. The definitions of each level sequence are as follows: For special level sequence users, direct charging is adopted without participating in any regulation and only exits when a system failure occurs. Therefore, the number of special level settings should be strictly restricted. The first level sequence adopts priority charging without participating in the peak-valley regulation of the power distribution system. However, when the load rate of the power distribution system is relatively high, it should give way to residential electricity. The second level sequence participates in daily peak-valley regulation. When the power distribution system is about to enter the daily peak value, it actively and orderly enters the waiting charging state and gives way to residential electricity and the first level sequence. The third level sequence participates in both daily peak-valley and hourly peak-valley regulation. When the power distribution system is about to enter the daily peak value and the hourly peak value, it both actively and orderly enters the waiting charging state and gives way to residential electricity and the first and second level sequences.

[0019] 11. After the user selects the special, 1, 2, and 3-level charging sequence levels to start charging, the user can adjust the sequence level or terminate or restart the charging mode according to the changes in real-time needs during the charging process. After receiving the information, the charging pile of this user will enter a new load sorting.

[0020] 12. Assume that the transformer capacity is Sa (kVA). Taking the maximum value of the surplus capacity of the transformer in the next 6 hours (the average value of 30 minutes) as Sm (kVA) and the minimum value as Sn (kVA) as an example. In the design, it is recommended to use no more than (Sa × 0.05 × 0.95 / 7) charging piles as the special level sequence, (Sn × 0.95 / 7) charging piles as the first level sequence, [(Sm - Sn) × 0.95 / 7] charging piles as the second level sequence, and the remaining charging piles as the third level sequence.

[0021] 13. The orderly charging control module conducts orderly charging control. The flowchart of the orderly charging control is as Figure 2 , and the control steps are as follows:

[0022] 1) Determine whether the control system itself is faulty? If abnormal, exit the charging piles in the corresponding control area, notify the management personnel and users, and then return to 1). If normal, continue to the next step.

[0023] 2) Determine whether the power distribution system is faulty? If abnormal, exit the charging piles in the corresponding power distribution area, notify the management personnel and users, and then return to 1). If normal, continue to the next step.

[0024] 3) Determine whether the transformer temperature is normal. If abnormal, batch and orderly exit the charging piles of the third, second, and first levels (every 3△n units as a batch, it is recommended that △n take 3 - 5 units), notify the management personnel and users, and then return to 1). If normal, continue to the next step.

[0025] 4) Determine whether the transformer is overloaded. If overloaded, batch and orderly exit the charging piles of the third, second, and first levels (every 3△n units as a batch, it is recommended that △n take 3 - 5 units), notify the management personnel and users, and then return to 1). If not overloaded, continue to the next step.

[0026] 5) Determine whether the transformer load rate has exceeded c% (c% can take 90%, but is not limited to this value) for continuous k minutes (k can take 5, but is not limited to this value). If so, batch and orderly exit the charging piles of the third, second, and first levels (every 3△n units as a batch, it is recommended that △n take 3 - 5 units), notify the management personnel and users, and then return to 1). If not, continue to the next step.

[0027] 6) Determine whether the transformer load rate exceeds c% (c% can take 90%, but is not limited to this value). If so, return to 1). If not, continue to the next step.

[0028] 7) Determine whether there are special level charging piles. If so, connect to the special level charging piles. If not, continue to the next step.

[0029] 8) Determine whether the transformer load rate exceeds c% (c% can be 90%, but is not limited to this value). If so, return to 1). If not, continue to the next step.

[0030] 9) Connect the first-level sequence charging piles of the xth (x = 1, 2, 3~n) batch. (Take every △n charging piles as a batch. To reduce the impact on the system, it is recommended that △n be taken as 3~5. When the number of charging piles w in the last batch is less than △n, the last batch can be directly taken as w). Notify the management personnel and users of the information of the newly connected charging piles, and continue to the next step.

[0031] 10) Determine whether all the first-level sequence charging piles are connected? If not, return to 1). If so, continue to the next step.

[0032] 11) Connect the second-level sequence charging piles of the yth (y = 1, 2, 3~n) batch. Notify the management personnel and users of the information of the newly connected charging piles, and continue to the next step.

[0033] 12) Determine whether all the second-level sequence charging piles are connected? If not, return to 1). If so, continue to the next step.

[0034] 13) Connect the third-level sequence charging piles of the zth (z = 1, 2, 3~n) batch. Notify the management personnel and users of the information of the newly connected charging piles, and continue to the next step.

[0035] 14) Determine whether all the third-level sequence charging piles are connected? If not, return to 1). If so, return to 1).

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] 1) Make full use of the dynamic surplus capacity of the original power supply system in the community, and meet the charging needs of electric vehicles in the community without increasing the capacity of the power supply system in the residential community.

[0038] 2) Provide users with a variety of charging sequence selection modes, and meet the charging needs of different users.

[0039] 3) Adopt the principle of giving priority to the original load of residents, and ensure that the charging load of electric vehicles does not affect the original electricity consumption of residents.

[0040] 4) Introduce the charging system fault detection and judgment logic, ensure that the charging piles in the corresponding range are disconnected in time when a fault occurs, and improve the charging safety. Brief Description of the Drawings

[0041] Figure 1 It is a structural diagram of an orderly charging and power distribution system for a residential community.

[0042] Figure 2 It is a control flow chart of orderly charging for a residential community. Embodiment

[0043] The present invention includes a distribution main line, a distribution main box, a branch control contactor, a temperature monitoring device, a voltage monitoring device, a current monitoring device, a load prediction module, a load sorting module, an orderly charging control module, a platform management system, and a mobile phone client. The method for controlling the orderly charging of electric vehicles in a residential community according to the present invention includes the following steps:

[0044] 1. Statistically analyze the capacities and locations of each transformer in the residential community, and statistically analyze the load rate parameters of each transformer in different seasons and at different times in recent years, so as to obtain the dynamic surplus capacity value nSt of each transformer based on time parameters. For the sake of simplicity in description, the present invention only takes one transformer and its power supply range as an example.

[0045] 2. During the statistical process, if it is found that the installation age of the community's power transformation and distribution equipment is relatively early, each power distribution device is close to the phase-out period, or the community's power transformation and distribution system has been in a full-load or even overloaded state for a long time, it is not recommended to use the original power supply system of the community to charge electric vehicles.

[0046] 3. Assume that a residential community is powered by a transformer with a capacity of Sa (kVA), and its dynamic surplus capacity value is St (kVA). It is agreed that all residential communities use AC charging piles with a power of 7 kW, and the power factor at the low-voltage side of the transformer is compensated to 0.95. Through calculation, it can be known that the number of AC charging piles that can be simultaneously connected to this transformer is (St×0.95 / 7) units.

[0047] 4. Assume that the above-mentioned community has (m×n) motor vehicle parking spaces. It is planned to draw m main line circuits from the low-voltage outgoing cabinet of the existing power transformation and distribution room, and each main line circuit evenly drives n charging piles on average. One distribution main box is set at the end of each main line circuit, and each main box is provided with n branch outgoing circuits to distribute power to n charging piles.

[0048] 5. Set a temperature sensor at the transformer winding, set a voltage transformer and a current transformer at the main breaker on the low-voltage side of the transformer. Set a voltage transformer at the busbar of the main distribution box of each charging pile, and set current transformers at the main incoming breaker of the box body and the breaker of each outgoing branch circuit. Set a contactor in each branch circuit. Such as Figure 1 .

[0049] 6. The control method described in the present invention mainly uses the load prediction module to guide users to select different charging sequence levels. Through the orderly charging control module, the contactors set in each branch circuit control the electric vehicle charging piles to perform actions such as access, waiting, withdrawal, and re-access, and finally realize the matching of the charging load of the community's electric vehicles and the dynamic surplus capacity of the community's power supply system.

[0050] 7. The load forecasting module is responsible for statistically analyzing the load patterns of community residents, the charging load patterns of electric vehicles, and their development trends, providing a basis for managers to formulate charging rules, and providing reference data for the charging duration of charging modes at different sequence levels in real time.

[0051] 8. The load forecasting module displays the distribution of charging spaces, the current availability of charging spaces, the prices and estimated charging durations of different charging sequence levels to the mobile client in real time. Different users with different demands are guided by prices to select different charging sequence levels.

[0052] 9. The load sorting module classifies regular user levels into charging sequence levels of 1, 2, and 3. To cope with emergency charging demands, a special level sequence is additionally set. When connecting to a charging pile, according to the level order, the charging piles of the special, 1, 2, and 3-level charging sequences are connected in turn. The sorting strategy within each same level adopts the first-come, first-served method. When a charging pile exits, according to the level order, the charging piles of the 3, 2, 2-level charging sequences exit in turn. The special-level charging pile only exits when a system failure occurs. The load sorting module should retain the charging sequence and queuing information at the last moment under any circumstances to facilitate continuing the previous queuing order when reconnecting for the second time or during fault recovery.

[0053] 10. The definitions of each level sequence are as follows: For special-level sequence users, direct charging is adopted without participating in any regulation and only exits when a system failure occurs. Therefore, the number of special-level settings should be strictly restricted. The first-level sequence adopts priority charging and does not participate in the peak-valley regulation of the distribution system. However, when the load rate of the distribution system is relatively high, it should give way to residential electricity. The second-level sequence participates in daily peak-valley regulation. When the distribution system is about to enter the daily peak value, it actively and orderly enters the waiting charging state and gives way to residential electricity and the first-level sequence. The third-level sequence participates in daily peak-valley and hourly peak-valley regulation. When the distribution system is about to enter the daily peak value and the hourly peak value, it both actively and orderly enters the waiting charging state and gives way to residential electricity and the first and second-level sequences.

[0054] 11. After the user selects the charging sequence levels of special, 1, 2, and 3 to start charging, the user can adjust the sequence level or terminate and restart the charging mode according to the changes in real-time demands during the charging process. After the load sorting module receives the information, the charging pile of this user will enter a new load sorting.

[0055] 12. Taking the transformer capacity as Sa (kVA) and the maximum value (taking the average value of 30 minutes) of the predicted surplus capacity value of the transformer in the next 6 hours as Sm (kVA) and the minimum value as Sn (kVA) as an example. It is recommended in the design to use no more than (Sa × 0.05 × 0.95 / 7) charging piles as the special-level sequence, (Sn × 0.95 / 7) charging piles as the first-level sequence, and [(Sm - Sn) × 0.95 / 7] charging piles as the second-level sequence. The remaining charging piles are used as the third-level sequence.

[0056] 13. The orderly charging control module conducts orderly charging control. The flowchart of the orderly charging control is as Figure 2 , and the control steps are as follows:

[0057] 1) Determine whether the control system itself fails. If abnormal, exit the charging piles in the corresponding control area, notify the management personnel and users, and then return to 1). If normal, continue to the next step.

[0058] 2) Determine whether the power distribution system fails. If abnormal, exit the charging piles in the corresponding power distribution area, notify the management personnel and users, and then return to 1). If normal, continue to the next step

[0059] 3) Determine whether the temperature of the transformer is normal. If abnormal, orderly withdraw the charging piles at the 3rd, 2nd, and 1st levels in batches (every 3△n units as a batch, it is recommended that △n be taken as 3 - 5 units), notify the management personnel and users, and then return to 1). If normal, continue to the next step.

[0060] 4) Determine whether the transformer is overloaded. If overloaded, orderly withdraw the charging piles at the 3rd, 2nd, and 1st levels in batches (every 3△n units as a batch, it is recommended that △n be taken as 3 - 5 units), notify the management personnel and users, and then return to 1). If not overloaded, continue to the next step.

[0061] 5) Determine whether the load rate of the transformer has exceeded c% (c% can be taken as 90%, but not limited to this value) for continuous k minutes (k can be taken as 5, but not limited to this value). If so, orderly withdraw the charging piles at the 3rd, 2nd, and 1st levels in batches (every 3△n units as a batch, it is recommended that △n be taken as 3 - 5 units), notify the management personnel and users, and then return to 1). If not, continue to the next step.

[0062] 6) Determine whether the load rate of the transformer exceeds c% (c% can be taken as 90%, but not limited to this value). If so, return to 1). If not, continue to the next step.

[0063] 7) Determine whether there are special - level charging piles. If there are, connect to the special - level charging piles. If not, continue to the next step.

[0064] 8) Determine whether the load rate of the transformer exceeds c% (c% can be taken as 90%, but not limited to this value). If so, return to 1). If not, continue to the next step.

[0065] 9) Connect to the charging piles in the 1st - level sequence of the x - th (x = 1, 2, 3~n) batch. (Take every △n units as a batch. To reduce the impact on the system, it is recommended that △n be taken as 3 - 5 units. When the number of charging piles w in the last batch is less than △n, the last batch can be directly taken as w units.) Notify the management personnel and users of the information of the newly connected charging piles, and continue to the next step.

[0066] 10) Determine whether all the Level 1 sequence charging piles are connected? If not, return to 1). If so, continue to the next step.

[0067] 11) Connect the Level 2 sequence charging piles in the y-th (y = 1, 2, 3 ~ n) batch. Notify the management staff and users of the information of the newly connected charging piles, and continue to the next step.

[0068] 12) Determine whether all the Level 2 sequence charging piles are connected? If not, return to 1). If so, continue to the next step.

[0069] 13) Connect the Level 3 sequence charging piles in the z-th (z = 1, 2, 3 ~ n) batch. Notify the management staff and users of the information of the newly connected charging piles, and continue to the next step.

[0070] 14) Determine whether all the Level 3 sequence charging piles are connected? If not, return to 1). If so, return to 1).

[0071] For example:

[0072] 1. Statistically analyze the capacity and location of each transformer in a residential community, and count the load rate parameters of each transformer in different seasons and at different times in recent years, so as to obtain the dynamic surplus capacity value of each transformer based on time parameters.

[0073] 2. For example, a certain residential community has 120 households and is equipped with 120 motor vehicle parking spaces, and each parking space is equipped with 1 AC charging pile. The power supply for residents is provided by 1 transformer with a capacity of 800 kVA.

[0074] 3. For the above 120 AC charging piles, it is planned to draw 4 main line circuits from the low-voltage outgoing cabinet of the existing substation, and set 1 distribution main box at the end of each main line circuit, and each main box drives 30 charging piles.

[0075] 4. Set temperature sensors at the transformer windings, voltage transformers and current transformers at the main circuit breaker on the low-voltage side of the transformer. Set voltage transformers at the busbars of the main distribution box of each charging pile, and set current transformers at the main incoming circuit breaker of the box body and at the circuit breaker of each outgoing branch circuit. Set contactors in each branch circuit. Refer to Figure 1 .

[0076] 5. It is predicted that during the next 6 hours, the average surplus capacity of the transformer during the late-night low-power consumption period is 480 kVA, and the average surplus capacity of the transformer during the evening peak power consumption period is 160 kVA. It is agreed that all AC charging piles in the residential community use a power of 7 kW, and the power factor at the low-voltage side of the transformer is compensated to 0.95. After calculation, it can be known that the number of AC charging piles that can be connected to this transformer at the same time is 21 - 65.

[0077] 6. The upper limits of each level of sequences in the design are as follows: there are 5 charging piles in the special-level sequence, 20 charging piles in the first-level sequence, and 40 charging piles in the second-level sequence. The remaining charging piles are used as the third-level sequence.

[0078] 7. Ordered charging control. The control steps are as follows:

[0079] 1) Determine whether the control system itself is faulty? If abnormal, exit the charging piles in the corresponding control area, notify the management personnel and users, and then return to 1). If normal, continue to the next step.

[0080] 2) Determine whether the power distribution system is faulty? If abnormal, exit the charging piles in the corresponding power distribution area, notify the management personnel and users, and then return to 1). If normal, continue to the next step.

[0081] 3) Determine whether the temperature of the transformer is normal. If abnormal, orderly exit the charging piles of the third, second, and first levels in batches (15 charging piles per batch), notify the management personnel and users, and then return to 1). If normal, continue to the next step.

[0082] 4) Determine whether the transformer is overloaded. If overloaded, orderly exit the charging piles of the third, second, and first levels in batches (15 charging piles per batch), notify the management personnel and users, and then return to 1). If not overloaded, continue to the next step.

[0083] 5) Determine whether the load rate of the transformer has exceeded 90% for 5 consecutive minutes. If so, orderly exit the charging piles of the third, second, and first levels in batches (15 charging piles per batch), notify the management personnel and users, and then return to 1). If not, continue to the next step.

[0084] 6) Determine whether the load rate of the transformer exceeds 90%. If so, return to 1). If not, continue to the next step.

[0085] 7) Determine whether there are special-level charging piles. If there are, connect to the special-level charging piles. If not, continue to the next step.

[0086] 8) Determine whether the load rate of the transformer exceeds 90%. If so, return to 1). If not, continue to the next step.

[0087] 9) Connect to the charging piles of the first-level sequence in the x (x = 1, 2, 3~n)th batch. (Take every △n charging piles as a batch. To reduce the impact on the system, it is recommended that △n be taken as 3 - 5 charging piles. When the number of charging piles w in the last batch is less than △n, the last batch can be directly taken as w charging piles.) Notify the management personnel and users of the information of the newly connected charging piles, and continue to the next step.

[0088] 10) Determine whether all the charging piles of the first-level sequence have been connected? If not, return to 1). If so, continue to the next step.

[0089] 11) Connect to the charging piles of the second-level sequence in the y-th (y = 1, 2, 3 ~ n) batch. Notify the management staff and users of the information of the newly connected charging piles, and continue to the next step.

[0090] 12) Determine whether all the charging piles of the second-level sequence have been connected? If not, return to 1). If so, continue to the next step.

[0091] 13) Connect to the charging piles of the third-level sequence in the z-th (z = 1, 2, 3 ~ n) batch. Notify the management staff and users of the information of the newly connected charging piles, and continue to the next step.

[0092] 14) Determine whether all the charging piles of the third-level sequence have been connected? If not, return to 1). If so, return to 1).

[0093] The above embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. An orderly charging control method for electric vehicles in a residential community, characterized in that: The orderly charging control system for electric vehicles includes a load prediction module, a load sorting module, an orderly charging control module, a platform management system, and a mobile client. The load prediction module, the load sorting module, the orderly charging control module, and the mobile client are respectively communicatively connected to the platform management system; the method for controlling the orderly charging of electric vehicles includes the following steps: (1) Statistically analyze the capacity and location of each transformer in the residential community, and the load rate parameters of each transformer at different seasons and different times, so as to obtain the dynamic surplus capacity value of each transformer based on time parameters; (2) For each transformer in the residential community, determine the number Li of AC charging piles that can be connected simultaneously to the i-th transformer according to the following formula: Li = (St × Xi / Y), where St is the dynamic surplus capacity value of this transformer, in kVA, Y is the rated power of the AC charging pile, in kW, and Xi is the power factor compensation value on the low-voltage side of the i-th transformer; (3) Divide the above Li AC charging piles into m zones, each zone contains n AC charging piles, each zone is provided with a main line loop connected to the i-th transformer, and each main line loop is provided with a distribution main box at its end, and each distribution main box is provided with n branch outgoing line loops respectively connected to n charging piles; (4) Set a temperature sensor at the transformer winding, a voltage transformer and a current transformer at the main breaker on the low-voltage side of the transformer; set a voltage transformer at the busbar of each distribution main box, and set current transformers at the main incoming line breaker of the distribution main box and at the breaker of each branch outgoing line loop; set a contactor in each branch outgoing line loop; (5) Use the load prediction module to guide users to select different charging sequence levels; when the orderly charging control module performs orderly charging control, it includes steps of judging whether the power distribution system is faulty, whether the transformer temperature is normal, and whether the transformer is overloaded; the orderly charging control module controls the electric vehicle charging piles to perform access, waiting, exit, or re-access actions through contactors, and finally realizes the matching of the charging load of electric vehicles in the community with the dynamic surplus capacity of the community power supply system; (6) Collect, statistically analyze, and analyze the load rules of community residents and the charging load rules of electric vehicles through the load prediction module, provide a basis for managers to formulate charging rules, and provide reference data for the charging duration of different sequence level charging modes in real time; (7) Provide and display the charging parking space distribution, the current status of available charging parking spaces, the prices of different charging sequence levels, and the estimated charging duration for the mobile client in real time through the load prediction module; guide users with different needs to select different charging sequence levels through prices; (8) The load sorting module classifies the charging levels of regular user charging piles into level 1, level 2, and level 3 charging sequence levels, and additionally sets a special charging sequence level; when a charging pile is connected, in the order of levels, the special, level 1, level 2, and level 3 charging sequence charging piles are connected in turn; the sorting strategy within each same level adopts the first-come-first-served method; when a charging pile exits, in the order of levels, the level 3, level 2, and level 1 charging sequence charging piles exit in turn, and the special sequence charging pile only exits when the system fails; the load sorting module retains the charging sequence and queuing information at the last moment under any circumstances to facilitate continuing the previous queuing order during the second connection or fault recovery. The special charging sequence level adopts direct charging, does not participate in any regulation, and only exits when the system fails; the level 1 charging sequence level adopts priority charging and does not participate in the peak-valley regulation of the power distribution system, but when the load rate of the power distribution system exceeds 90%, it gives way to residential electricity; the level 2 sequence participates in the daily peak-valley regulation. When the power distribution system is about to enter the daily peak value, it actively and orderly enters the waiting charging state and gives way to residential electricity and the level 1 charging sequence level; the level 3 sequence participates in the daily peak-valley and hourly peak-valley regulations. When the power distribution system is about to enter the daily peak value and the hourly peak value, it both actively and orderly enters the waiting charging state and gives way to residential electricity, the level 1 charging sequence level, and the level 2 charging sequence level. The capacity of the i-th transformer is Sa (kVA). The maximum value of the average of the surplus capacity values of the transformer in the next 6 hours for 30 minutes is Sm (kVA), and the minimum value is Sn (kVA). No more than (Sa × 0.05 × 0.95 / 7) charging piles are used as the special charging sequence level, (Sn × 0.95 / 7) charging piles are used as the level 1 charging sequence level, [(Sm - Sn) × 0.95 / 7] charging piles are used as the level 2 charging sequence level, and the remaining charging piles are used as the level 3 charging sequence level.

2. The method for controlling the orderly charging of electric vehicles for a residential community according to claim 1, characterized in that: After the user selects the special charging sequence level, level 1 charging sequence level, level 2 charging sequence level, or level 3 charging sequence level to start charging, the user adjusts the sequence level or terminates or restarts the charging mode according to the changes in real-time requirements during the charging process; after the load sorting module receives the information, the user's charging pile will enter a new load sorting.

3. The method for controlling the orderly charging of electric vehicles for a residential community according to claim 1, wherein: The orderly charging control module performs orderly charging control in the following steps: 1) Judge whether the control system itself is faulty. If the control system is abnormal, exit the charging piles in the corresponding control area, notify the management personnel and users, and return to 1); if the control system is normal, continue to the next step; 2) Judge whether the power distribution system is faulty. If the power distribution system is abnormal, exit the charging piles in the corresponding power distribution area, notify the management personnel and users, and return to 1); if the power distribution system is normal, continue to the next step; 3) Judge whether the transformer temperature is normal. If the transformer temperature is abnormal, batch and orderly exit the level 3, level 2, and level 1 charging piles, with every 3△n piles as a batch, and △n takes 3 to 5 piles, and notify the management personnel and users, and return to 1); if the transformer temperature is normal, continue to the next step; 4) Determine whether the transformer is overloaded. If the transformer is overloaded, disconnect the Level 3, 2, and 1 charging piles in batches and in an orderly manner, with every 3△n units as a batch, and notify the management staff and users, then return to 1); if the transformer is not overloaded, continue to the next step; 5) Determine whether the load rate of the transformer has exceeded c% for k consecutive minutes, where k = 3 - 10 and c% = 85 - 95%. If so, disconnect the Level 3, 2, and 1 charging piles in batches and in an orderly manner, with every 3△n units as a batch, and notify the management staff and users, then return to 1); if not, continue to the next step; 6) Determine whether the load rate of the transformer exceeds c%. If so, return to 1); if not, continue to the next step; 7) Determine whether there is a special - level charging pile. If there is, connect to the special - level charging pile. If not, continue to the next step; 8) Determine whether the load rate of the transformer exceeds c%. If so, return to 1); if not, continue to the next step; 9) Connect to the charging piles of the first - level charging sequence of the x - th (x = 1, 2, 3 - n) batch; take every △n units as a batch; when the number of charging piles w in the last batch is less than △n, take w units for the last batch; notify the management staff and users of the newly connected charging pile information, and continue to the next step; 10) Determine whether all the charging piles in the first - level sequence are connected. If not, return to 1); if so, continue to the next step; 11) Connect to the charging piles of the second - level sequence of the y - th (y = 1, 2, 3 - n) batch; notify the management staff and users of the newly connected charging pile information, and continue to the next step; 12) Determine whether all the charging piles in the second - level sequence are connected. If not, return to 1); if so, continue to the next step; 13) Connect to the charging piles of the third - level sequence of the z - th (z = 1, 2, 3 - n) batch, notify the management staff and users of the newly connected charging pile information, and continue to the next step; 14) Determine whether all the charging piles in the third - level sequence are connected. If not, return to 1); if so, return to 1).

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