CN117261660A - Charging pile power control method and system based on load monitoring analysis - Google Patents
Charging pile power control method and system based on load monitoring analysis Download PDFInfo
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/60—Monitoring or controlling charging stations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/60—Monitoring or controlling charging stations
- B60L53/68—Off-site monitoring or control, e.g. remote control
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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
- H02J3/001—Methods to deal with contingencies, e.g. abnormalities, faults or failures
- H02J3/00125—Transmission line or load transient problems, e.g. overvoltage, resonance or self-excitation of inductive loads
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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
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/14—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
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- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention belongs to the technical field of power systems and automation, and the method comprises the steps of acquiring data, integrating and transmitting the data to a control platform, and formulating a data error prevention strategy; setting a distribution load threshold and a charging load duty ratio threshold according to the running condition of the transformer, and executing a power control strategy; and carrying out data circulation according to the power grid and the charging pile data, and obtaining and executing the instruction by the charging pile. The invention solves the problems that the traditional charging pile power control method cannot dynamically adjust strategies in real time according to charging requirements and grid loads, has low energy utilization efficiency, is easy to cause grid overload and voltage fluctuation, and the like, effectively integrates the existing electric automobile load resources and fully adjusts the elasticity of the resources, realizes the controllability and adjustability of the electric automobile load resources, and ensures the safe and stable operation of a grid system.
Description
Technical Field
The invention relates to the technical field of power systems and automation, in particular to a charging pile power control technology based on load monitoring analysis.
Background
With popularization and construction of charging facilities and continuous perfection of a charging network, the charging load of the electric automobile is accessed into a power grid on a large scale, the space and time uncertainty of the charging load can bring new challenges to the running development of the power grid, the power consumption is increased year by year, the capacity of original power supply equipment is limited, and the capacity is difficult to increase; on the other hand, the charging power requirements of the automobile are unbalanced, and the power supply output capacity is wasted greatly. In order to ensure the stable operation of the power supply equipment and improve the economic benefit, the flexible charging control of the charging equipment is particularly carried out.
The charging pile power control refers to a process of managing and adjusting charging power of an electric vehicle charging pile. The purpose of the power control of the charging pile is to reasonably distribute and adjust the power output of the charging pile according to actual demands and power grid conditions so as to realize efficient, safe and sustainable charging process. The traditional charging pile has the defects of inflexibility, energy waste, large influence on a power grid, lack of intelligent interconnection function and the like.
Inflexibility: the traditional charging pile power control is usually fixed, and cannot be dynamically adjusted in real time according to charging requirements and power grid load conditions. This means that the charging pile charges with a fixed power regardless of whether the charging demand is high or low, resulting in waste of resources or inability to meet the demand. Energy waste: conventional charging pile power control does not take into account grid load conditions and energy utilization efficiency, and charging is often performed at a fixed power, resulting in energy waste during low peak hours or low demand. The influence on the power grid is large: the traditional charging pile power control does not effectively manage the influence of charging load on the power grid, and particularly during peak time or large-scale charging, the problems of power grid overload, voltage fluctuation and the like can be caused. Lack of intelligent interconnect functionality: traditional charging pile power control often lacks intelligent interconnection function, can not carry out effective data interaction and scheduling with electric wire netting, user and other equipment, has restricted intelligent level and the comprehensive performance of charging system.
Disclosure of Invention
The present invention has been made in view of the above-described problems occurring in the prior art. The method aims at solving the problems that the power control of the charging pile is inflexible, energy waste is easy to cause, the influence on a power grid is large, intelligent interconnection is lacking and the like in the prior art, and by collecting and integrating power grid load data of a power grid energy platform and charging load data of a third-party operation platform, different charging pile power control strategies are intelligently formulated according to different conditions, the problems that the traditional charging pile power control method cannot dynamically adjust strategies according to charging requirements and power grid loads in real time, the energy utilization efficiency is low, power grid overload and voltage fluctuation are easy to cause and the like are solved, the load resources of the existing electric automobile are effectively integrated, the elasticity of the resources is fully adjusted, the controllable and adjustable electric automobile load resources are realized, and the safe and stable operation of a power grid system is ensured.
Therefore, a charging pile power control method based on load monitoring analysis is provided.
In order to solve the technical problems, the invention provides a charging pile power control method based on load monitoring analysis, which comprises the following steps:
acquiring data, integrating and transmitting the data to a control platform, and formulating a data error prevention strategy; setting a distribution load threshold and a charging load duty ratio threshold according to the running condition of the transformer, and executing a power control strategy; and carrying out data circulation according to the power grid and the charging pile data, and obtaining and executing the instruction by the charging pile.
As a preferable scheme of the charging pile power control method based on load monitoring analysis, the invention comprises the following steps: the data error prevention strategy comprises the steps of integrating after receiving the load information of the transformer and the data of the real-time charging power of the charging pile, and formulating the data error prevention strategy: and carrying out data anomaly identification, data deviation early warning and data complement.
The data anomaly identification comprises the steps of establishing a data cleaning mechanism, and identifying the data before the data are stored in a warehouse and stored in a server after the charging pile load control receives the transformer load information and the data of the real-time charging power of the charging pile: when the data which is higher than the rated capacity of the distribution transformer and is continuously higher than a high load point value of 1 hour and the charging load is larger than the branch line load, grabbing and removing are carried out, so that the abnormal data is prevented from entering the warehouse to influence the strategy abnormal triggering.
The data deviation early warning comprises the steps of establishing a data deviation early warning mechanism, classifying historical baseline load data into a workday baseline, a holiday baseline and real-time load data, and calculating the deviation of each load point value:
P Δt ＝P rt -P bt
wherein P is Δt For load deviation at time t, P rt To monitor the load active value at t in real time, P bt Load active value at baseline t; and when the deviation exceeds the data of the historical average threshold, early warning is carried out, a first trigger point is ignored when the strategy is triggered, and execution is started when the strategy is triggered by continuous x points.
As a preferable scheme of the charging pile power control method based on load monitoring analysis, the invention comprises the following steps: the data supplementary acquisition comprises the steps of establishing a data supplementary acquisition mechanism, and carrying out supplementary acquisition on the data with empty real-time distribution transformer load point value through handshake transmission of a next interface: and checking the previous time point data through interface interaction every time, supplementing when null values are found, and continuing supplementing the data next time until the data is not null, wherein the supplementing is unsuccessful.
As a preferable scheme of the charging pile power control method based on load monitoring analysis, the invention comprises the following steps: the running condition of the transformer comprises the steps of setting a charging pile power automatic control strategy distribution transformer load threshold and a charging load duty ratio threshold based on real-time load information and charging load information of the transformer.
The start-stop of the charging pile equipment comprises the remote closing and starting of the equipment by a charging power control module.
The charging pile power control comprises power voltage drop and starting and stopping of charging pile equipment: the power voltage drop is controlled according to a rated power proportion value, the specific proportion value is the ratio of the real-time load of the distribution transformer to the threshold value, and the control is carried out according to the absolute value of the power:
P V ＝k×P
wherein P is actual For the actual load power, P threshold S is the total number of piles in charging under the distribution transformer topology structure and P is the power threshold V For power drop, k is a proportional value.
As a preferable scheme of the charging pile power control method based on load monitoring analysis, the invention comprises the following steps: the power control strategy comprises the steps of judging whether the distribution transformer load exceeds a distribution transformer load threshold value or not after the load of the integrated power grid and the charging pile and the charging power data are transmitted in: when the distribution transformer load does not exceed the distribution transformer load threshold, the power control strategy is not required to be executed.
When the distribution transformer load exceeds the distribution transformer load threshold, judging whether the charging load exceeds the duty ratio threshold: when the charge load does not exceed the duty cycle threshold, then no power control strategy need be implemented.
When the charging load exceeds the duty ratio threshold, the automatic control strategy of the charging pile power is required to be executed to judge the type of the transformer, when the transformer is public transformer, the charging pile is a private alternating current charging pile generally, and the equipment start-stop mode is selected to control.
And when the transformer is specially changed, judging the type of the charging pile, and selecting a start-stop mode of the equipment to control if the type of the charging pile is an alternating current charging pile.
And when the charging pile type is a direct-current charging pile, selecting the mode of controlling according to the power voltage drop of the charging pile.
As a preferable scheme of the charging pile power control method based on load monitoring analysis, the invention comprises the following steps: the data transfer method comprises the steps of collecting the load of the transformer and collecting charging data of the charging pile:
the transformer load acquisition comprises the step of transmitting the transformer load acquisition to an opposite terminal system in a unidirectional transmission mode, and the step of acquiring line data, distribution transformer data, rated capacity data and real-time load data, wherein the transmission frequency of the load data is f minutes/time.
The charging pile charging data acquisition comprises the steps of transmitting the charging pile charging data to an opposite-end system in a bidirectional interaction mode, acquiring an uploading charging load and receiving a control instruction, wherein the load data transmission frequency is f minutes/time.
As a preferable scheme of the charging pile power control method based on load monitoring analysis, the invention comprises the following steps: the data flow mode comprises that a charging power control module acquires charging pile archive data of a direct-connection charging pile and a third-party operator platform and real-time charging load data, reports according to the subordinate relation of a station and the charging pile, establishes station-level resource archives and load information, transformer substation load monitoring provides a distribution network topological structure, reports data according to the topological relation of a station area, a transformer and the station, gathers equipment resources and charging load information, executes triggering conditions of load control and execution scheme of load control in a control strategy, monitors a station area and distribution transformer load threshold value and a duty ratio threshold value of charging load and total load data in real time, and judges whether the strategy is executed:
and when the power control strategy does not reach the distribution transformer load threshold value and the charging load duty ratio threshold value, the control strategy is not triggered.
When the power control strategy exceeds the distribution transformer load threshold and the charging load duty ratio threshold, control instructions are issued according to the station, pile and network topological structures, the control instructions comprise specific execution time and execution load control quantity, the charging pile starts to execute after acquiring the instructions, and the execution result is fed back to the control system for archiving.
The invention also aims to provide a system of the charging pile power control method based on load monitoring analysis, wherein the data acquisition and integration module can monitor the load condition of the charging pile in real time, collect related data, integrate and transmit the data to the next module; the data error prevention module can analyze and process the acquired data, so that data errors or abnormal conditions are avoided, and the stability and the accuracy of the system are ensured; the power control strategy module can formulate an optimal charging power control strategy according to the load condition and the charging requirement of the charging pile so as to ensure the safe and efficient operation of the charging pile; the data flow module can realize the transmission and communication of data among the modules, so that the whole system can efficiently and cooperatively work, and the optimal control of the charging pile is realized; the charging pile power control system based on load monitoring analysis can realize real-time monitoring and control of the charging pile, optimize the operation efficiency and safety of the charging pile, and improve charging experience and user experience.
The charging pile power control system based on the load monitoring analysis is characterized by comprising a data acquisition and integration module, a data error prevention module, a power control strategy module and a data circulation module.
And the data acquisition and integration module is responsible for collecting, integrating and transmitting load monitoring data of the charging pile.
And the data error prevention module performs verification and supplementary acquisition processing on the acquired data, and ensures the accuracy and reliability of the data.
And the power control module formulates a corresponding power control strategy according to the load monitoring data and the characteristics of the charging pile, so as to realize the optimal operation of the charging pile.
And the data flow module transmits the power control strategy to the charging pile control system, monitors the running state and the charging progress of the charging pile and feeds back relevant data to the upper system.
A computer device comprising a memory and a processor, said memory storing a computer program, characterized in that said processor, when executing said computer program, implements the steps of a method for controlling the power of a charging pile based on load monitoring analysis.
A computer readable storage medium having stored thereon a computer program, characterized in that the computer program when executed by a processor implements the steps of a method of controlling the power of a charging pile based on load monitoring analysis.
The invention has the beneficial effects that: the charging pile power control method based on load monitoring analysis can help to manage the load of the power grid and avoid overload condition. By reasonably distributing the charging power, the peak value of the power grid load can be evenly dispersed, the impact on a power system is reduced, and the reliability and stability of the power grid are improved. The charging pile power control method provided by the invention can reasonably arrange charging power according to the supply and demand conditions of the power system, and optimize the utilization efficiency of energy resources. Through carrying out nimble adjustment with electric power according to user's charge demand and electric wire netting load condition, can reduce energy waste and unnecessary power consumption, improve charging station operating efficiency. By the charging pile power control method based on load monitoring analysis, the utilization rate and service quality of the charging facility can be better managed. According to the demands of users and the loads of the power grid, charging power is reasonably distributed, charging efficiency can be improved, queuing waiting time of the users is reduced, and user experience and satisfaction are improved.
Drawings
For a clearer description of the technical solutions of embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art, wherein:
fig. 1 is a schematic flow chart of a charging pile power control method based on load monitoring analysis according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a main principle of a charging pile power control method based on load monitoring analysis according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a power control flow of a charging pile according to a power control method of a charging pile based on load monitoring analysis according to an embodiment of the present invention.
Fig. 4 is a data error prevention sub-flowchart of a charging pile power control method based on load monitoring analysis according to an embodiment of the present invention.
Fig. 5 is a schematic diagram of a data flow of a charging pile power control method based on load monitoring analysis according to an embodiment of the present invention.
Fig. 6 is a schematic diagram of a working flow of a charging pile power control system based on load monitoring analysis according to an embodiment of the present invention.
Detailed Description
So that the manner in which the above recited objects, features and advantages of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present invention is not limited to the specific embodiments disclosed below.
Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic can be included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
While the embodiments of the present invention have been illustrated and described in detail in the drawings, the cross-sectional view of the device structure is not to scale in the general sense for ease of illustration, and the drawings are merely exemplary and should not be construed as limiting the scope of the invention. In addition, the three-dimensional dimensions of length, width and depth should be included in actual fabrication.
Also in the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper, lower, inner and outer", etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first, second, or third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The terms "mounted, connected, and coupled" should be construed broadly in this disclosure unless otherwise specifically indicated and defined, such as: can be fixed connection, detachable connection or integral connection; it may also be a mechanical connection, an electrical connection, or a direct connection, or may be indirectly connected through an intermediate medium, or may be a communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Example 1
Referring to fig. 1, a first embodiment of the present invention provides a charging pile power control method based on load monitoring analysis, including:
s1: and acquiring data, integrating and transmitting the data to a control platform, and formulating a data error prevention strategy.
Further, firstly, the topology of the power grid distribution transformer, load information and charging load and power data of the charging pile are respectively obtained, the embodiment of the invention is that the topology and the load data of the power grid are obtained from a color cloud energy platform, the charging load and the power data of the direct-connection charging pile are obtained from the color cloud charging platform, the charging load and the power data of the charging pile are obtained from a third-party operator platform, and the obtained data are respectively transmitted to the color cloud charging platform.
It should be noted that after the charging pile load control module receives the transformer load information and the data of the real-time charging power of the charging pile, the data integration is performed, a data error prevention strategy is formulated, and the reliability and accuracy of the data are ensured.
It should also be noted that, the data error prevention policy includes integrating the data of the real-time charging power of the charging pile after receiving the transformer load information, preprocessing the collected data, including data cleaning, format conversion, outlier processing, etc., integrating the preprocessed transformer load information with the real-time charging power data of the charging pile, and in the integration process, attention is required to pay attention to the relevance of the data, for example, associating the transformer load information with the charging power data of the charging pile according to time, geographic position, etc., so as to facilitate subsequent analysis and application; the integrated data is stored in a designated database or data warehouse to facilitate subsequent querying and management. In the storage process, the data can be classified, aggregated and compressed by using technologies such as data mining, machine learning and the like, so that the storage efficiency and the query performance of the data are improved, and the analysis result is displayed to a user in a visual mode.
It should also be noted that, data error prevention strategies are formulated: carrying out data anomaly identification, data deviation early warning and data complement:
the data anomaly identification comprises the steps of establishing a data cleaning mechanism, and identifying the data before the data are stored in a warehouse and stored in a server after the charging pile load control receives the transformer load information and the data of the real-time charging power of the charging pile: when the data which is higher than the rated capacity of the distribution transformer and is continuously higher than a high load point value of 1 hour and the charging load is larger than the branch line load, grabbing and removing are carried out, so that the abnormal data is prevented from entering the warehouse to influence the strategy abnormal triggering.
The data deviation early warning comprises the steps of establishing a data deviation early warning mechanism, classifying historical baseline load data into a workday baseline, a holiday baseline and real-time load data, and calculating the deviation of each load point value:
P Δt ＝P rt -P bt
wherein P is Δt For load deviation at time t, P rt To monitor the load active value at t in real time, P bt Load active value at baseline t; and when the deviation exceeds the data of the historical average threshold, early warning is carried out, a first trigger point is ignored when the strategy is triggered, and execution is started when the strategy is triggered by continuous x points.
The data complementary acquisition mechanism comprises the steps of establishing a data complementary acquisition mechanism, and carrying out complementary acquisition on the data with the empty real-time distribution transformer load point value through handshake transmission of the next interface: and checking the previous time point data through interface interaction every time, supplementing when null values are found, and continuing supplementing the data next time until the data is not null, wherein the supplementing is unsuccessful.
S2: and setting a distribution transformer load threshold and a charging load duty ratio threshold according to the running condition of the transformer, and executing a power control strategy.
Furthermore, the charging power control module sets a charging pile power automatic control strategy distribution load threshold and a charging load duty ratio threshold based on the real-time load information and the charging load information of the transformer, and the distribution load threshold is set according to the running condition of the transformer.
It should be noted that the power control of the charging pile comprises two control modes of power pressure drop and start-stop of the charging pile equipment, wherein the power pressure drop mode can be controlled according to a rated power proportion value, and the specific proportion value is the ratio of the real-time load of the distribution transformer to the threshold value; control may also be performed in terms of absolute power:
P V ＝k×P
wherein P is actual For the actual load power, P threshold S is the total number of piles in charging under the distribution transformer topology structure and P is the power threshold V K is a proportional value for power drop; the charging pile equipment is started and stopped mainly by the remote closing and starting of the charging power control module.
After the charge power control module combines the distribution transformer load and the charge load to set the distribution transformer load threshold and the charge load duty ratio threshold, the execution flow of the power control strategy is as follows:
(1) Judging whether the distribution transformer load exceeds a distribution transformer load threshold value:
if the distribution transformer load does not exceed the distribution transformer load threshold, a power control strategy is not required to be executed; if the distribution transformer load exceeds the distribution transformer load threshold, the next step is carried out.
(2) Judging whether the charging load exceeds a duty ratio threshold value:
if the charging load does not exceed the duty ratio threshold, a power control strategy is not required to be executed; if the charging load exceeds the duty ratio threshold, the automatic control strategy of the charging pile power needs to be executed.
(3) Judging the type of the transformer:
if the transformer is a public transformer, the charging pile is a private alternating current charging pile generally, and a mode of starting and stopping equipment is selected for control; if the transformer is specially changed, the type of the charging pile needs to be further judged.
(4) Judging the type of the charging pile:
if the type of the charging pile is an alternating current charging pile, selecting a starting and stopping mode of equipment to control; and if the charging pile type is a direct-current charging pile, selecting to control according to the power voltage drop mode of the charging pile.
S3: and carrying out data circulation according to the power grid and the charging pile data, and obtaining and executing the instruction by the charging pile.
Furthermore, the data transfer method comprises the steps of collecting the load of the transformer and collecting the charging data of the charging pile: the transformer load acquisition comprises the steps of transmitting the load acquisition to an opposite terminal system in a unidirectional transmission mode, and acquiring line data, distribution transformer data, rated capacity data and real-time load data, wherein the load data transmission frequency is f minutes/times, namely, the load data is updated every f minutes; the acquisition mode is favorable for grasping the running condition of the transformer in real time, and provides basis for power grid dispatching and management.
The charging pile charging data acquisition comprises the steps of transmitting the charging pile charging data to an opposite terminal system in a bidirectional interaction mode, acquiring an upward charging load and receiving a control instruction, wherein the load data transmission frequency is f minutes/times, namely, charging load data is updated every f minutes; the collection mode is favorable for monitoring the service condition of the charging pile in real time, provides basis for power grid dispatching and management, is favorable for implementing fine charging management, and improves charging efficiency.
It should be noted that, the data flow mode includes that the charging power control module obtains charging pile archive data and real-time charging load data of the direct-connection charging pile and the third party operator platform, reports according to the subordinate relationship of the station and the charging pile, establishes station-level resource archive and load information, provides a distribution network topology structure for transformer substation load monitoring, reports data according to the topological relationship of the station, the transformer and the station, gathers equipment resources and charging load information, executes triggering conditions of load control and execution scheme of load control in the control strategy, monitors the duty ratio threshold of the station and distribution transformer load threshold, charging load and total load data in real time, and judges whether the strategy executes:
and when the power control strategy does not reach the distribution transformer load threshold value and the charging load duty ratio threshold value, the control strategy is not triggered.
When the power control strategy exceeds 80% of the distribution transformer load threshold and 40% of the charging load ratio threshold, according to the station, pile and network topological structure, issuing control instructions including specific execution time and execution load control quantity, starting execution after the charging pile acquires the instructions, and feeding back the execution results to a control system for archiving.
Example 2
Referring to fig. 2-5, for one embodiment of the present invention, a method for controlling power of a charging pile based on load monitoring analysis is provided, and in order to verify the beneficial effects of the present invention, scientific demonstration is performed through experiments.
The method comprises the steps of obtaining power grid topology and load data from a color cloud energy platform, obtaining charging load and power data of a direct-connection charging pile from a color cloud charging platform, obtaining charging load and power data of the charging pile from a third-party operator platform, and respectively transmitting the obtained data to the color cloud charging platform.
According to the color cloud energy source and the color cloud charging platform, the color cloud energy source and the color cloud charging platform comprise a transformer, a charging pile and a control platform, and a test network should comprise corresponding hardware equipment and software systems so as to realize data acquisition, transmission and control functions, and the specific implementation is as follows:
table 1 data acquisition and transmission
| Time (minutes) | Real-time load of transformer (kW) | Charging pile charging load (kW) |
| 0 | 100 | 50 |
| 15 | 120 | 55 |
| 30 | 110 | 60 |
| 45 | 105 | 55 |
| 60 | 125 | 65 |
| 75 | 115 | 58 |
| 90 | 100 | 52 |
Table 2 data error protection strategy
| Time (minutes) | Calculation of deviation (%) | Early warning state |
| 0 | - | Without any means for |
| 15 | 2.5 | Early warning |
| 30 | - | Without any means for |
| 45 | 3.5 | Early warning |
| 60 | - | Without any means for |
| 75 | 2.0 | Early warning |
| 90 | - | Without any means for |
Early warning is carried out when the deviation exceeds 20% of the average value of 7 days of history, the first trigger point is ignored when the strategy is triggered, and execution is started when 4 points are triggered continuously.
Table 3 establishes a data bias early warning mechanism
The present embodiment is set to 80% of the capacity of the transformer, and the charging load duty ratio threshold is flexibly set according to the charging load and the distribution transformer load condition, and is set to 40%.
Table 4 sets the distribution load threshold and the charge load duty cycle threshold
The load data transmission frequency was 15 minutes/time.
Table 5 implements the power control strategy
| Time | Charging pile charging load | Instruction execution case |
| 0 | 50 | Not being executed |
| 15 | 55 | Not being executed |
| 30 | 60 | Not being executed |
| 45 | 55 | Not being executed |
| 60 | 65 | Execution of |
| 75 | 58 | Execution of |
| 90 | 5 | Execution of |
The color cloud energy platform acquires power grid topological information and load information such as a transformer area, a transformer, a charging station and the like, and transmits the information to the color cloud charging platform, the color cloud charging platform acquires direct-connection charging pile or charging pile file data of a third-party operator platform and real-time charging load and power data, intelligent monitoring analysis is carried out by combining the acquired power grid load data and charging load data, different power control methods are formulated for different situations, then power control instructions are issued to a charging pile power control module, direct control is carried out on the direct-connection charging pile through the charging pile power control module, indirect control is carried out on the third-party operator platform, and V2G friendly interaction is achieved, so that peak clipping and valley filling are achieved.
It should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered by the scope of the claims of the present invention.
Example 3
A third embodiment of the present invention, which is different from the first two embodiments, is:
the functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
Logic and/or steps represented in the flowcharts or otherwise described herein, e.g., a ordered listing of executable instructions for implementing logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.
More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). In addition, the computer readable medium may even be paper or other suitable medium on which the program is printed, as the program may be electronically captured, via, for instance, optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner, if necessary, and then stored in a computer memory.
It is to be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.
Example 4
Referring to fig. 6, in a fourth embodiment of the present invention, a charging pile power control system based on load monitoring analysis is provided, which includes a data acquisition and integration module, a data error prevention module, a power control policy module and a data circulation module.
The data acquisition and integration module is responsible for collecting, integrating and transmitting load monitoring data of the charging pile.
The data error prevention module performs verification and supplementary acquisition processing on the acquired data, and ensures the accuracy and reliability of the data.
And the power control module formulates a corresponding power control strategy according to the load monitoring data and the characteristics of the charging pile, so as to realize the optimal operation of the charging pile.
The data flow module transmits the power control strategy to the charging pile control system, monitors the running state and the charging progress of the charging pile and feeds back relevant data to the upper system.
It should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered by the scope of the claims of the present invention.
Claims (10)
1. A charging pile power control method based on load monitoring analysis is characterized by comprising the following steps of: comprising the steps of (a) a step of,
acquiring data, integrating and transmitting the data to a control platform, and formulating a data error prevention strategy;
setting a distribution load threshold and a charging load duty ratio threshold according to the running condition of the transformer, and executing a power control strategy;
and carrying out data circulation according to the power grid and the charging pile data, and obtaining and executing the instruction by the charging pile.
2. The charging pile power control method based on load monitoring analysis as claimed in claim 1, wherein: the data error prevention strategy comprises the steps of integrating after receiving the load information of the transformer and the data of the real-time charging power of the charging pile, and formulating the data error prevention strategy: carrying out data anomaly identification, data deviation early warning and data complement;
the data anomaly identification comprises the steps of establishing a data cleaning mechanism, and identifying the data before the data are stored in a warehouse and stored in a server after the charging pile load control receives the transformer load information and the data of the real-time charging power of the charging pile: when the data which is higher than the rated capacity of the distribution transformer and is continuously higher than a high load point value of 1 hour and the charging load is greater than the branch line load, grabbing and removing are carried out, so that the abnormal data is prevented from entering the warehouse to influence strategy abnormal triggering;
the data deviation early warning comprises the steps of establishing a data deviation early warning mechanism, classifying historical baseline load data into a workday baseline, a holiday baseline and real-time load data, and calculating the deviation of each load point value:
P Δt ＝P rt -P bt
wherein P is Δt For load deviation at time t, P rt To monitor the load active value at t in real time, P bt Load active value at baseline t;
and when the deviation exceeds the data of the historical average threshold, early warning is carried out, a first trigger point is ignored when the strategy is triggered, and execution is started when the strategy is triggered by continuous x points.
3. The charging pile power control method based on load monitoring analysis as claimed in claim 2, wherein: the data supplementary acquisition comprises the steps of establishing a data supplementary acquisition mechanism, and carrying out supplementary acquisition on the data with empty real-time distribution transformer load point value through handshake transmission of a next interface: and checking the previous time point data through interface interaction every time, supplementing when null values are found, and continuing supplementing the data next time until the data is not null, wherein the supplementing is unsuccessful.
4. A charging pile power control method based on load monitoring analysis as defined in claim 3, wherein: the running condition of the transformer comprises the steps of setting a charging pile power automatic control strategy distribution load threshold and a charging load duty ratio threshold based on real-time load information and charging load information of the transformer;
the start-stop of the charging pile equipment comprises the remote closing and starting of the equipment by a charging power control module;
the charging pile power control comprises power voltage drop and starting and stopping of charging pile equipment: the power voltage drop is controlled according to a rated power proportion value, the specific proportion value is the ratio of the real-time load of the distribution transformer to the threshold value, and the control is carried out according to the absolute value of the power:
P V ＝k×P
wherein P is actual For the actual load power, P threshold S is the total number of piles in charging under the distribution transformer topology structure and P is the power threshold V For power drop, k is a proportional value.
5. The charging pile power control method based on load monitoring analysis according to claim 4, wherein: the power control strategy comprises the steps of judging whether the distribution transformer load exceeds a distribution transformer load threshold value or not after the load of the integrated power grid and the charging pile and the charging power data are transmitted in: when the distribution transformer load does not exceed the distribution transformer load threshold, a power control strategy is not required to be executed;
when the distribution transformer load exceeds the distribution transformer load threshold, judging whether the charging load exceeds the duty ratio threshold: when the charging load does not exceed the duty ratio threshold, a power control strategy is not required to be executed;
when the charging load exceeds the duty ratio threshold, a charging pile power automatic control strategy is required to be executed to judge the type of the transformer, when the transformer is a public transformer, the charging pile is a private alternating current charging pile generally, and the equipment start-stop mode is selected to control;
when the transformer is specially changed, judging the type of the charging pile, and selecting a start-stop mode of the equipment to control if the type of the charging pile is an alternating current charging pile;
and when the charging pile type is a direct-current charging pile, selecting the mode of controlling according to the power voltage drop of the charging pile.
6. The charging pile power control method based on load monitoring analysis according to claim 5, wherein: the data transfer method comprises the steps of collecting the load of the transformer and collecting charging data of the charging pile:
the transformer load acquisition comprises the steps of transmitting the transformer load acquisition to an opposite terminal system in a unidirectional transmission mode, and acquiring line data, distribution transformer data, rated capacity data and real-time load data, wherein the transmission frequency of the load data is f minutes/time;
the charging pile charging data acquisition comprises the steps of transmitting the charging pile charging data to an opposite-end system in a bidirectional interaction mode, acquiring an uploading charging load and receiving a control instruction, wherein the load data transmission frequency is f minutes/time.
7. The charging pile power control method based on load monitoring analysis as set forth in claim 6, wherein: the data flow mode comprises that a charging power control module acquires charging pile archive data of a direct-connection charging pile and a third-party operator platform and real-time charging load data, reports according to the subordinate relation of a station and the charging pile, establishes station-level resource archives and load information, transformer substation load monitoring provides a distribution network topological structure, reports data according to the topological relation of a station area, a transformer and the station, gathers equipment resources and charging load information, executes triggering conditions of load control and execution scheme of load control in a control strategy, monitors a station area and distribution transformer load threshold value and a duty ratio threshold value of charging load and total load data in real time, and judges whether the strategy is executed:
when the power control strategy does not reach the distribution transformer load threshold value and the charging load duty ratio threshold value, the control strategy is not triggered;
when the power control strategy exceeds the distribution transformer load threshold and the charging load duty ratio threshold, control instructions are issued according to the station, pile and network topological structures, the control instructions comprise specific execution time and execution load control quantity, the charging pile starts to execute after acquiring the instructions, and the execution result is fed back to the control system for archiving.
8. A system employing the charging pile power control method based on load monitoring analysis as claimed in any one of claims 1 to 7, characterized in that: the system comprises a data acquisition and integration module, a data error prevention module, a power control strategy module and a data circulation module;
the data acquisition and integration module is responsible for collecting, integrating and transmitting load monitoring data of the charging pile;
the data error prevention module performs verification and supplementary acquisition processing on the acquired data, and ensures the accuracy and reliability of the data;
the power control module formulates a corresponding power control strategy according to the load monitoring data and the characteristics of the charging pile, so as to realize the optimal operation of the charging pile;
and the data flow module transmits the power control strategy to the charging pile control system, monitors the running state and the charging progress of the charging pile and feeds back relevant data to the upper system.
9. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor implements the steps of the method of any of claims 1 to 7 when the computer program is executed.
10. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 1 to 7.
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| CN117955111A (en) * | 2024-03-27 | 2024-04-30 | 佰聆数据股份有限公司 | Distribution transformer capacity load balancing method, device, equipment and medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117955111A (en) * | 2024-03-27 | 2024-04-30 | 佰聆数据股份有限公司 | Distribution transformer capacity load balancing method, device, equipment and medium |
| CN117955111B (en) * | 2024-03-27 | 2024-07-12 | 佰聆数据股份有限公司 | Distribution transformer capacity load balancing method, device, equipment and medium |
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