CN117087478B - Charging control system for charging pile - Google Patents
Charging control system for charging pile 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
- B60L53/62—Monitoring or controlling charging stations in response to charging parameters, e.g. current, voltage or electrical charge
-
- 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
- B60L53/30—Constructional details of charging stations
- B60L53/31—Charging columns specially adapted for electric vehicles
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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
- B60L53/66—Data transfer between charging stations and vehicles
- B60L53/665—Methods related to measuring, billing or payment
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/12—Electric charging stations
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- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a charging pile charging control system, which relates to the technical field of charging control systems, wherein a payment module processes the power grid data in a vehicle charging process after user payment is completed, a monitoring module establishes a power correction coefficient after acquiring the power grid data in real time, judges whether charging control is required according to a comparison result of the power correction coefficient and a gradient threshold value, and the charging control module adjusts charging power according to the judgment result, so that the charging power can be timely adjusted when the power grid is abnormal, the evaluation module regularly analyzes the power correction coefficient discrete degree of all the power grids, ranks all the power grids based on the power correction coefficient discrete degree to generate a power grid ranking table, the power grid ranking table is sent to a charging station manager, and the charging station manager selects the access sequence of the charging station power grid according to the ranking table.
Description
Technical Field
The invention relates to the technical field of charging control systems, in particular to a charging control system of a charging pile.
Background
The charging station is a facility for specially providing electric energy for electric vehicles, and is usually composed of a plurality of charging piles, so that the charging piles are used for meeting the charging requirements of electric vehicle owners in different places and at different time, the charging piles are infrastructure for specially providing electric energy for the electric vehicles, and along with popularization of the electric vehicles, the charging piles are more and more common in places such as cities and highways and become an important charging source of the electric vehicles;
with the increasing awareness of environmental protection and sustainable travel, electric vehicles gradually become a trend in the automotive industry, and the charging demands of electric vehicles are rapidly increasing, so that an effective charging control system is required to meet these demands, and the charging control system of the charging pile is a complex system designed for managing, monitoring and optimizing the charging process of electric vehicles.
The electric pile is mainly obtained the electric current from the electric wire netting, and large-scale charging station can access a plurality of electric wire netting generally, and current charge control system has following defect:
1. when the power grid is abnormal in the vehicle charging process, the existing charging control system does not monitor the circuit abnormality and cannot adjust the charging power of the vehicle, so that the charging pile is over-stressed, the charging burden is increased, and the charging pile is damaged;
2. because the large-scale charging station is connected with a plurality of power grids, the main purpose is to increase the flexibility and the reliability of the charging station, however, the control system does not perform periodic performance evaluation processing on the power grids, so that the charging station cannot select the optimal power grid for access use, and the charging stability of the charging pile cannot be ensured.
Disclosure of Invention
The invention aims to provide a charging control system of a charging pile, which aims to solve the defects in the background technology.
In order to achieve the above object, the present invention provides the following technical solutions: a charging control system of a charging pile comprises a user interface module, a payment module, a monitoring module, a charging control module, a charging module and an evaluation module;
a user interface module: providing an interface for interaction between a user and the charging pile;
and (3) a payment module: processing the functions related to user payment, and waking up the charging control module and the monitoring module after the user payment is completed;
and a monitoring module: in the vehicle charging process, after acquiring power grid data in real time, establishing a power correction coefficient, and judging whether charging control is needed or not according to a comparison result of the power correction coefficient and a gradient threshold value;
and a charging control module: starting charging after the payment of the user is completed, stopping charging after the charging is completed, and adjusting the charging power according to a judging result in the vehicle charging process;
and a charging module: calculating the charging cost of a user according to the service condition and the charging rate of the charging pile;
and an evaluation module: and periodically analyzing the power correction coefficient discrete degree of all the power grids, sequencing all the power grids based on the power correction coefficient discrete degree, generating a power grid sequencing table, and transmitting the power grid sequencing table to a charging station manager.
In a preferred embodiment, the grid data includes voltage flicker, total harmonic distortion rate, power factor index, and environmental impact power floating index.
In a preferred embodiment, the monitoring module calculates the voltage flicker, the total harmonic distortion, the power factor index, and the environmental impact power floating index to build the power correction factor gl x The computational expression is:
in the formula, ys z Dy is the power factor index s For voltage flicker, xb j For total harmonic distortion, gl f For the environment-influencing power floating index, alpha, beta, gamma and omega are respectively the power factor index, voltage flicker, total harmonic distortion and the proportionality coefficient of the environment-influencing power floating index, and alpha, beta, gamma and omega are all larger than 0.
In a preferred embodiment, the gradient threshold includes a first threshold and a second threshold, and the first threshold is smaller than the second threshold, and the monitoring module calculates the power correction factor gl x After the value, the power correction coefficient gl x Respectively comparing the first threshold value and the second threshold value;
if the power correction coefficient gl x The value is less than or equal to a first threshold value, which indicates that the power grid is not abnormal and does not need to be charged;
if the power correction coefficient gl x The value is larger than a second threshold value, which indicates that the power grid is abnormal and serious, and charging control is needed;
if the first threshold value is smaller than the power correction coefficient gl x The value is less than or equal to a second threshold value, which indicates that the power grid is abnormal, but the abnormality is mild, and charging control is needed.
In a preferred embodiment, the charging control module adjusts the charging power according to the determination result during the vehicle charging process, including the following steps:
when the power correction coefficient gl x The value is larger than a second threshold value, charging control is needed, at the moment, the charging control module timely controls the current connection power grid of the charging pile to be disconnected, and the charging pile is switched to be connected with other power grids;
first threshold < power correction factor gl x The value is less than or equal to a second threshold value, and charging control is needed, and the charging control module uses the power correction coefficient gl x The value re-corrects the charging power to the vehicle, and the calculation expression is:
in the formula cd g0 For initial charge power, cd g1 To correct the charging power gl x Is a power correction coefficient;
will correct the charging power cd g1 As the current charging power of the vehicle.
In a preferred embodiment, the evaluation module periodically analyzes the degree of power correction factor dispersion of all the power grids, comprising the steps of:
acquiring all power correction coefficients of a power grid and establishing a power correction coefficient set;
calculating the average value of the power correction coefficients in the power correction coefficient setAnd a discrete coefficient GQ;
where i= {1, 2, 3,..and n }, n represents the number of power correction coefficients in the power correction coefficient set, n is a positive integer, GL i Representing different power correction coefficients within the power correction coefficient set,representing the power correction coefficient levelAnd (5) an average value.
In a preferred embodiment, the evaluation module ranks all the grids based on the degree of power correction coefficient dispersion, and generating the grid ranking table includes the steps of:
if the average value of the power correction coefficients of the power grid is larger than a second threshold value and the discrete coefficient is smaller than or equal to the discrete coefficient threshold value, evaluating the poor stability of the power grid, and classifying all the power grids with poor stability into a first class;
if the average value of the power correction coefficients of the power grid is larger than a second threshold value and the discrete coefficient is larger than the discrete coefficient threshold value, evaluating the stability of the power grid, and dividing all the power grids in the stability into a second category;
if the average value of the power correction coefficients of the power grid is less than or equal to a first threshold value and the discrete coefficient is more than the discrete coefficient threshold value, evaluating good stability of the power grid, and classifying all the power grids with good stability into a third class;
if the average value of the power correction coefficients of the power grid is less than or equal to a first threshold value and the discrete coefficient is less than or equal to a discrete coefficient threshold value, evaluating the stability of the power grid, and classifying all the power grids with the stability into a fourth category;
and sorting the power grids in the first category, the second category, the third category and the fourth category, wherein the priority level is that the first category is less than the second category and less than the third category and less than the fourth category, and after the power grids in each category are sorted again from large to small through the average value of the power correction coefficients, a sorting table is generated.
In a preferred embodiment, the calculated expression of the voltage flicker is:
wherein Vi represents the variation amplitude of the voltage, ti represents the duration, T represents the observation time period, t=t2-T1, T1 is the starting observation time point, and T2 is the ending observation time point;
the power factor index has a calculation expression as follows:
where P represents active power, S represents apparent power, and θ represents a phase difference between voltage and current.
In a preferred embodiment, the total harmonic distortion is calculated as:
where Vh denotes an effective value of each harmonic voltage, vn denotes an effective value of the fundamental wave voltage, vm denotes an effective value of the highest harmonic voltage, and V1 denotes an effective value of the fundamental wave voltage.
In a preferred embodiment, the environmental impact power float index is calculated as:
g (t) is the real-time output power variation of the power grid, [ t ] x ，t y ]For the early warning period of the environmental temperature of the charging pile, [ t ] j ，t i ]And (5) a time period for early warning the ambient humidity of the charging pile.
In the technical scheme, the invention has the technical effects and advantages that:
1. after user payment is processed through the payment module, in the vehicle charging process, the monitoring module establishes a power correction coefficient after acquiring power grid data in real time, judges whether charging control is needed according to a comparison result of the power correction coefficient and a gradient threshold value, and the charging control module adjusts charging power according to the judgment result, so that the charging power can be timely adjusted when the power grid is abnormal, the evaluation module regularly analyzes the power correction coefficient discrete degree of all the power grids, ranks all the power grids based on the power correction coefficient discrete degree, generates a power grid ranking table, the power grid ranking table is sent to a charging station manager, and the charging station manager selects an access sequence of the charging station power grid according to the ranking table;
2. the invention comprehensively calculates the voltage flicker, the total harmonic distortion rate, the power factor index and the environment influence power floating index to establish the power correction coefficient through the monitoring module, comprehensively analyzes the power grid, has more accurate analysis, comprehensively calculates multiple parameters, effectively improves the data processing efficiency and is based on the power correction coefficient gl x Corresponding charging control is carried out on the comparison result of the first threshold value and the second threshold value, charging is intelligently controlled, manual intervention is reduced, and control efficiency is improved;
3. the invention obtains the power correction coefficient discrete degree of all power grids in the charging station every 30 days through the evaluation module, obtains all power correction coefficients of the power grids to establish a power correction coefficient set, and calculates the average value of the power correction coefficients in the power correction coefficient setAnd evaluating all the power grids accessed by the charging station according to the comparison result of the average value of the power correction coefficient and the first threshold value and the second threshold value and by combining the comparison result of the corresponding discrete coefficient and the discrete coefficient threshold value, thereby facilitating the charging station manager to know the use condition of each power grid, selecting the optimal power grid for use and greatly improving the operation stability of the charging station.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.
FIG. 1 is a block diagram of a system according to the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1: referring to fig. 1, the charging control system for a charging pile according to the present embodiment includes a user interface module, a payment module, a monitoring module, a charging control module, a charging module, and an evaluation module;
a user interface module: providing an interface for interaction between a user and the charging pile, wherein the interface comprises information for displaying the state of the charging pile, the charging progress, the charging cost and the like, and functions for logging in, selecting a charging mode, paying and the like of the user, and the user uses a payment module through a user interface module;
1) And displaying the state of the charging pile: the user interface firstly displays the current state of the charging pile, including whether the charging pile is idle, in charging, in maintenance and the like, so that a user can know the availability;
2) Charging progress information: if a vehicle is being charged, the interface displays the charging progress, such as the charged time, the remaining time, the electric quantity percentage and the like, so as to help the user to know the charging condition;
3) Charging cost information: the user interface displays the charge information of the current charge, including real-time rate, consumed amount and the like, so as to help the user grasp the charge condition;
4) User login/registration: the user interface provides login and registration functions to allow a user to log in using a personal account or register a new account when needed to record user information and payment history;
5) Selecting a charging mode: the user can select the charging modes supported by the charging pile, such as quick charging, slow charging and the like, so as to meet different requirements and time limits;
6) Payment function: the user interface provides a payment function, and a user can select a payment mode (such as a credit card, a payment bank, a WeChat and the like) and complete payment after the charging is finished;
7) Reservation function (if any): if the charging stake supports the reservation function, the user interface may allow the user to reserve charging for a particular period of time;
8) History viewing: the user can view previous charging history records including charging time, cost, consumption, etc.
And (3) a payment module: processing functions related to user payment, including receiving a user payment instruction, generating a payment order, calling a payment interface to pay, processing a payment result and the like, waking up a charging control module and a monitoring module after the payment is completed, and feeding back the payment result to a user through a user interface module;
1) Receiving a payment instruction: when the user selects charging to be completed and prepares for payment, the payment module receives a payment instruction of the user;
2) Generating a payment order: according to the charging information and the rate of the user, the payment module generates a payment order, wherein the payment order comprises charging pile ID, charging duration, cost and other information;
3) Invoking a payment interface: the payment module calls a payment interface and sends the generated payment order information to a payment platform so as to carry out actual payment operation;
4) Waiting for payment results: the payment module waits for the paymate to return a payment result, which may take some time, depending on the processing speed of the paymate;
5) Processing payment results: after the payment platform returns the payment result, the payment module analyzes the payment result and judges whether the payment is successful or not;
6) Waking up a charging control module: if the payment is successful, the payment module informs the charging control module to allow continuous charging or stop charging, and the charging is completed according to the charging completion condition;
7) And (3) waking up the monitoring module: also, after successful payment, the payment module may notify the monitoring module to monitor and record the charging state in real time;
8) And feeding back payment results to the user interface: the payment module transmits the payment result to the user interface module so as to display the successful or failed payment information to the user;
9) Generating payment credentials: if the payment is successful, the payment module may generate payment credentials including payment time, amount, order number, etc., for reference by the user.
And a monitoring module: in the vehicle charging process, after power grid data are acquired in real time, a power correction coefficient is established, whether charging control is needed or not is judged according to a comparison result of the power correction coefficient and a gradient threshold value, a judgment result is sent to a charging control module, and the power correction coefficient is sent to an evaluation module.
And a charging control module: starting charging after the payment of the user is completed, stopping charging after the charging is completed, adjusting charging power according to a judging result in the vehicle charging process, tightly matching the module with charging pile hardware equipment, performing data interaction through a communication interface of a charging pile, and sending charging control information to a charging module;
1) Starting charging: after the payment module finishes the payment, the charging control module receives a signal of successful payment and starts the charging pile hardware equipment to allow the electric energy to be transmitted to the vehicle for charging;
2) Adjusting charging power: in the charging process, the charging control module may dynamically adjust the charging power according to the real-time power grid condition, the vehicle demand and the charging equipment capacity; if the power grid pressure is high or other factors influence the stability, the charging control module can limit the charging power so as to ensure the stability of the power grid;
3) Monitoring a charging process: the charging control module is tightly matched with the charging pile hardware equipment, and monitors various parameters in the charging process, such as voltage, current, charging duration and the like in real time; this helps to detect abnormal conditions, ensuring the safety of charging;
4) Stopping charging: when the charging is completed or reaches a charging target set by a user, the charging control module sends a charging stopping instruction to stop the charging pile from providing electric energy to the vehicle.
And a charging module: calculating charging cost of a user according to the service condition and charging rate of the charging pile, generating a charging bill of the user according to charging record and payment information of the charging pile, and feeding the charging bill back to the user through a user interface module;
acquiring a charging record: the charging module firstly obtains a charging record from the charging control module, wherein the charging record comprises information such as charging pile ID, charging start time, charging end time, charging power and the like;
acquiring a charging rate: according to the setting of the charging pile, the charging module can acquire corresponding charging rate, which can be a charging manner according to time, electric quantity or other forms;
calculating charging cost: based on the charging record and the charging rate, the charging module calculates the charge to obtain the charging charge of the user;
generating a charging bill: once the charging cost is calculated, the charging module generates a corresponding charging bill, including information such as charging date, duration, electric quantity, cost and the like;
associating user information: the charging module associates the charging bill with the user information to ensure that the bill can be accurately distributed to the corresponding user;
saving a bill record: the generated charging bill information is stored in a database for subsequent inquiry, printing or export;
feeding back billing information to the user interface: the charging module transmits the generated charging bill information to the user interface module so as to display the detail of the cost and payment options to the user;
and (5) periodic settlement: depending on the billing period set by the system (e.g., monthly, weekly, etc.), the billing module may aggregate and bill all charges.
And an evaluation module: and periodically analyzing the power correction coefficient discrete degree of all the power grids, sorting all the power grids based on the power correction coefficient discrete degree, generating a power grid sorting table, sending the power grid sorting table to a charging station manager, and selecting the access sequence of the charging station power grids by the charging station manager according to the sorting table.
After user payment is processed through the payment module, in the vehicle charging process, after the monitoring module acquires power grid data in real time, the power correction coefficient is built, whether charging control is needed or not is judged according to the comparison result of the power correction coefficient and the gradient threshold value, the charging control module adjusts charging power according to the judgment result, and accordingly charging power can be timely adjusted when the power grid is abnormal, the evaluation module regularly analyzes the power correction coefficient discrete degree of all the power grids, all the power grids are ordered based on the power correction coefficient discrete degree, a power grid ordering table is generated, the power grid ordering table is sent to a charging station manager, the charging station manager selects the access sequence of the charging station power grid according to the ordering table, the control system avoids excessive pressure of the charging pile, reduces charging burden, enables the charging station to select optimal power grid access for use, and effectively guarantees charging stability of the charging pile.
Example 2: and the monitoring module establishes a power correction coefficient after acquiring power grid data in real time in the vehicle charging process, judges whether charging control is required according to the comparison result of the power correction coefficient and the gradient threshold value, and sends the judgment result to the charging control module, and the power correction coefficient is sent to the evaluation module.
The power grid data comprises voltage flicker, total harmonic distortion rate, power factor index and environment influence power floating index;
the monitoring module comprehensively calculates voltage flicker, total harmonic distortion rate, power factor index and environment influence power floating index to establish a power correction coefficient gl x The computational expression is:
in the formula, ys z Dy is the power factor index s For voltage flicker, xb j For total harmonic distortion, gl f For the environment-influencing power floating index, alpha, beta, gamma and omega are respectively the power factor index, voltage flicker, total harmonic distortion and the proportionality coefficient of the environment-influencing power floating index, and alpha, beta, gamma and omega are all larger than 0.
The gradient threshold includes a first threshold and a second threshold,and the first threshold is smaller than the second threshold, and the monitoring module calculates the power correction coefficient gl x After the value, the power correction coefficient gl x Respectively comparing the first threshold value and the second threshold value;
if the power correction coefficient gl x The value is less than or equal to a first threshold value, which indicates that the power grid is not abnormal and does not need to be charged;
if the power correction coefficient gl x The value is larger than a second threshold value, which indicates that the power grid is abnormal and serious, and charging control is needed;
if the first threshold value is smaller than the power correction coefficient gl x The value is less than or equal to a second threshold value, which indicates that the power grid is abnormal, but the abnormality is mild and charging control is needed;
the power correction coefficient is built by comprehensively calculating the voltage flicker, the total harmonic distortion rate, the power factor index and the environment influence power floating index through the monitoring module, the power grid is comprehensively analyzed, the analysis is more accurate, the multiparameter comprehensive calculation is performed, the data processing efficiency is effectively improved, and the power correction coefficient gl is used for being based on x And the comparison result of the first threshold value and the second threshold value is used for carrying out corresponding charging control, the charging is intelligently controlled, the manual intervention is reduced, and the control efficiency is improved.
The charging control module adjusts the charging power according to the judging result in the vehicle charging process, and comprises the following steps:
when the power correction coefficient gl x The value is larger than a second threshold value, which indicates that the power grid is abnormal and serious, and charging control is needed, at the moment, the charging control module timely controls the current connection of the charging pile to the power grid to be disconnected, and switches the charging pile to be connected with other power grids;
first threshold < power correction factor gl x The value is less than or equal to a second threshold value, which indicates that the power grid is abnormal, but the abnormality is mild and the charging control is needed, and at the moment, the charging control module corrects the coefficient gl through the power x The value re-corrects the charging power to the vehicle, and the calculation expression is:
in the formula cd g0 For initial charge power, cd g1 To correct the charging power gl x Is a power correction coefficient;
will correct the charging power cd g1 As the current charging power of the vehicle.
In this application:
the power factor index is calculated as:
wherein P represents active power, S represents apparent power, and θ represents a phase difference between voltage and current;
the larger the power factor index is, the smaller the phase difference between the current and the voltage in the power grid is, the closer the active power in the circuit is to the apparent power, which means that the current and the voltage waveforms in the power grid are more similar to sine waves, the energy utilization efficiency of the power grid is higher, the generation and transmission of harmonic waves in the power grid are reduced, the damage to power grid equipment is reduced, and the stability of the power grid is better.
The calculation expression of the voltage flicker is:
wherein Vi represents the variation amplitude of the voltage, ti represents the duration, T represents the observation time period, t=t2-T1, T1 is the starting observation time point, and T2 is the ending observation time point;
the voltage flicker refers to the instantaneous change degree of the voltage in the power grid, the larger the voltage flicker is, the larger the instantaneous change degree of the voltage in the power grid is, the voltage flicker can generate certain influence on the power grid and related equipment, when the voltage flicker exceeds a certain range, the problems of power grid equipment failure, abnormal operation of electronic equipment, power quality reduction and the like can be caused, therefore, the larger the voltage flicker is, the worse the power quality of the power grid is, and the stability and reliability of the power grid can be influenced.
The calculation expression of the total harmonic distortion rate is as follows:
where Vh represents the effective value of each harmonic voltage, vn represents the effective value of the fundamental wave voltage, vm represents the effective value of the highest harmonic voltage, and V1 represents the effective value of the fundamental wave voltage;
the total harmonic distortion rate is an index for measuring harmonic content in a power grid, and represents the ratio of the sum of all subharmonic voltage or current components in a voltage or current waveform in the power grid to fundamental voltage or current component, and the larger the total harmonic distortion rate is, the higher the harmonic content in the power grid is, namely the proportion of all subharmonic components in the voltage or current waveform is, the higher harmonic content can lead to distortion of the voltage and current waveform in the power grid, overheat, vibration and noise of power equipment can be possibly caused, even normal operation of electronic equipment is influenced, in addition, the harmonic can lead to increase of electric energy loss in the power grid and reduce efficiency of electric energy transmission, so that the higher the total harmonic distortion rate is, the worse the electric energy quality of the power grid is represented, and the stability and reliability of the power grid can be possibly influenced.
The calculated expression of the environmental impact power floating index is:
g (t) is the real-time output power variation of the power grid, [ t ] x ，t y ]For the early warning period of the environmental temperature of the charging pile, [ t ] i ，t j ]The method comprises the steps of (1) providing a time period for early warning of the environmental humidity of the charging pile;
the time period of the early warning of the environmental temperature of the charging pile represents the time period of the environmental temperature of the charging pile exceeding a temperature threshold value, and the time period of the early warning of the environmental humidity of the charging pile represents the time period of the environmental humidity of the charging pile exceeding a humidity threshold value;
the charging pile is connected into a plurality of power grids, and for different power grids, the same environmental temperature or humidity can cause inconsistent output power changes of different power grids, and the output power changes are mainly related to power distribution equipment of the power grids, so that some power grids are possibly suitable for the geographic environment where a charging station is located, some power grids cannot be suitable for the geographic environment where the charging station is located, and the larger the environment influence power floating index of the power grid is, the more serious the power grid is influenced by the environment.
Example 3: the evaluation module regularly analyzes the power correction coefficient discrete degree of all the power grids, ranks all the power grids based on the power correction coefficient discrete degree, generates a power grid ranking table, sends the power grid ranking table to a charging station manager, and the charging station manager selects the access sequence of the power grid of the charging station according to the ranking table.
Wherein: the evaluation module acquires the power correction coefficient dispersion degree of all the power grids in the charging station every 30 days, and comprises the following steps:
acquiring all power correction coefficients of a power grid and establishing a power correction coefficient set;
calculating the average value of the power correction coefficients in the power correction coefficient setAnd the discrete coefficient GQ, mean ∈ ->The power correction coefficient quantity is obtained by summing all the power correction coefficients and then removing the power correction coefficients;
where i= {1, 2, 3,..and n }, n represents the number of power correction coefficients in the power correction coefficient set, n is a positive integer, GL i Representing different power correction coefficients within the power correction coefficient set,representing the average value of the power correction coefficients;
if the average value of the power correction coefficients of the power grid is larger than a second threshold value and the discrete coefficient is smaller than or equal to the discrete coefficient threshold value, evaluating the poor stability of the power grid, and classifying all the power grids with poor stability into a first class;
if the average value of the power correction coefficients of the power grid is larger than a second threshold value and the discrete coefficient is larger than the discrete coefficient threshold value, evaluating the stability of the power grid, and dividing all the power grids in the stability into a second category;
if the average value of the power correction coefficients of the power grid is less than or equal to a first threshold value and the discrete coefficient is more than the discrete coefficient threshold value, evaluating good stability of the power grid, and classifying all the power grids with good stability into a third class;
if the average value of the power correction coefficients of the power grid is less than or equal to a first threshold value and the discrete coefficient is less than or equal to a discrete coefficient threshold value, evaluating the stability of the power grid, and classifying all the power grids with the stability into a fourth category;
the power grids in the first category, the second category, the third category and the fourth category are ranked, the priority level is that the first category is less than the second category and less than the third category is less than the fourth category, and the power grids in each category are ranked again from large to small through the average value of the power correction coefficients, for example: in the fourth category, two power grids exist, and the larger the average value of the power correction coefficients of the two power grids is, the more the power grids are ranked forward;
it should be noted that the charging station needs to have a certain charging stability, so when the power grid access is selected, the power grids in the first category and the second category are firstly excluded, and if the evaluation module evaluates that the charging station does not have the power grids in the third category and the fourth category, the charging station manager needs to reselect the power grid access to the outside.
According to the power correction coefficient dispersion degree evaluation method, the power correction coefficient dispersion degree of all power grids in the charging station is obtained every 30 days through the evaluation module, all power correction coefficients of the power grids are obtained to establish a power correction coefficient set, and the average value of the power correction coefficients in the power correction coefficient set is calculatedAnd discrete coefficient GQ, and according to the comparison result of power correction coefficient average value and first threshold value and second threshold valueAnd the charging station access all power grids are evaluated by combining the corresponding discrete coefficient and the discrete coefficient threshold comparison result, so that a charging station manager can know the use condition of each power grid conveniently, and select the optimal power grid for use, and the operation stability of the charging station is improved greatly.
The above formulas are all formulas with dimensions removed and numerical values calculated, the formulas are formulas with a large amount of data collected for software simulation to obtain the latest real situation, and preset parameters in the formulas are set by those skilled in the art according to the actual situation.
The above embodiments may be implemented in whole or in part by software, hardware, firmware, or any other combination. When implemented in software, the above-described embodiments may be implemented in whole or in part in the form of a computer program product. The computer program product comprises one or more computer instructions or computer programs. When the computer instructions or computer program are loaded or executed on a computer, the processes or functions described in accordance with the embodiments of the present application are all or partially produced. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website site, computer, server, or data center to another website site, computer, server, or data center by wired or wireless means (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains one or more sets of available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium. The semiconductor medium may be a solid state disk.
It should be understood that the term "and/or" is merely an association relationship describing the associated object, and means that three relationships may exist, for example, a and/or B may mean: there are three cases, a alone, a and B together, and B alone, wherein a, B may be singular or plural. In addition, the character "/" herein generally indicates that the associated object is an "or" relationship, but may also indicate an "and/or" relationship, and may be understood by referring to the context.
In the present application, "at least one" means one or more, and "a plurality" means two or more. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b, or c may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or plural.
It should be understood that, in various embodiments of the present application, the sequence numbers of the foregoing processes do not mean the order of execution, and the order of execution of the processes should be determined by the functions and internal logic thereof, and should not constitute any limitation on the implementation process of the embodiments of the present application.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.
In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
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 such understanding, the technical solution of the present application 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, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a read-only-memory (ROM), a random-access-memory (RAM), a magnetic disk, or an optical disk, etc., which can store program codes.
The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (5)
1. Charging control system of charging pile, its characterized in that: the system comprises a user interface module, a payment module, a monitoring module, a charging control module, a charging module and an evaluation module;
a user interface module: providing an interface for interaction between a user and the charging pile;
and (3) a payment module: processing the functions related to user payment, and waking up the charging control module and the monitoring module after the user payment is completed;
and a monitoring module: in the vehicle charging process, after acquiring power grid data in real time, establishing a power correction coefficient, and judging whether charging control is needed or not according to a comparison result of the power correction coefficient and a gradient threshold value;
and a charging control module: starting charging after the payment of the user is completed, stopping charging after the charging is completed, and adjusting the charging power according to a judging result in the vehicle charging process;
and a charging module: calculating the charging cost of a user according to the service condition and the charging rate of the charging pile;
and an evaluation module: periodically analyzing the power correction coefficient discrete degree of all the power grids, sequencing all the power grids based on the power correction coefficient discrete degree, generating a power grid sequencing table, and sending the power grid sequencing table to a charging station manager;
the power grid data comprise voltage flicker, total harmonic distortion rate, power factor index and environment influence power floating index;
the monitoring module comprehensively calculates voltage flicker, total harmonic distortion rate, power factor index and environment influence power floating index to establish a power correction coefficient gl x The computational expression is:
in the formula, ys z Dy is the power factor index s For voltage flicker, xb j For total harmonic distortion, gl f For the environment-influencing power floating index, alpha, beta, gamma and omega are respectively the power factor index, voltage flicker, total harmonic distortion rate and the proportionality coefficient of the environment-influencing power floating index, and alpha, beta, gamma and omega are all larger than 0;
the gradient threshold comprises a first threshold and a second threshold, the first threshold is smaller than the second threshold, and the monitoring module calculates a power correction coefficient gl x After the value, the power correction coefficient gl x Respectively comparing the first threshold value and the second threshold value;
if the power correction coefficient gl x The value is less than or equal to a first threshold value, which indicates that the power grid is not abnormal and does not need to be charged;
if the power correction coefficient gl x The value is larger than a second threshold value, which indicates that the power grid is abnormal and serious, and charging control is needed;
if the first threshold value is smaller than the power correction coefficient gl x The value is less than or equal to a second threshold value, which indicates that the power grid is abnormal, but the abnormality is mild and charging control is needed;
the charging control module adjusts the charging power according to the judging result in the vehicle charging process, and comprises the following steps:
when the power correction coefficient gl x The value is larger than a second threshold value, charging control is needed, at the moment, the charging control module timely controls the current connection power grid of the charging pile to be disconnected, and the charging pile is switched to be connected with other power grids;
first threshold < power correction factor gl x The value is less than or equal to a second threshold value, and charging control is needed, and the charging control module uses the power correction coefficient gl x The value re-corrects the charging power to the vehicle, and the calculation expression is:
wherein, cd g0 For initial charge power, cd g1 To correct the charging power gl x Is a power correction coefficient;
will correct the charging power cd g1 As the current charging power of the vehicle;
the evaluation module periodically analyzes the power correction coefficient discrete degree of all the power grids, and comprises the following steps:
acquiring all power correction coefficients of a power grid and establishing a power correction coefficient set;
calculating the average value of the power correction coefficients in the power correction coefficient setAnd a discrete coefficient GQ;
where i= {1, 2, 3,..and n }, n represents the number of power correction coefficients in the power correction coefficient set, n is a positive integer, GL i Representing different power correction coefficients within the power correction coefficient set,the average value of the power correction coefficient is shown.
2. The charging pile charging control system according to claim 1, characterized in that: the evaluation module ranks all the power grids based on the degree of dispersion of the power correction coefficients, and the generation of the power grid ranking table comprises the following steps:
if the average value of the power correction coefficients of the power grid is larger than a second threshold value and the discrete coefficient is smaller than or equal to the discrete coefficient threshold value, evaluating the poor stability of the power grid, and classifying all the power grids with poor stability into a first class;
if the average value of the power correction coefficients of the power grid is larger than a second threshold value and the discrete coefficient is larger than the discrete coefficient threshold value, evaluating the stability of the power grid, and dividing all the power grids in the stability into a second category;
if the average value of the power correction coefficients of the power grid is less than or equal to a first threshold value and the discrete coefficient is more than the discrete coefficient threshold value, evaluating good stability of the power grid, and classifying all the power grids with good stability into a third class;
if the average value of the power correction coefficients of the power grid is less than or equal to a first threshold value and the discrete coefficient is less than or equal to a discrete coefficient threshold value, evaluating the stability of the power grid, and classifying all the power grids with the stability into a fourth category;
and sorting the power grids in the first category, the second category, the third category and the fourth category, wherein the priority level is that the first category is less than the second category and less than the third category and less than the fourth category, and after the power grids in each category are sorted again from large to small through the average value of the power correction coefficients, a sorting table is generated.
3. The charging pile charging control system according to claim 2, characterized in that: the calculation expression of the voltage flicker is as follows:
wherein Vi represents the variation amplitude of the voltage, ti represents the duration, T represents the observation time period, t=t2-T1, T1 is the starting observation time point, and T2 is the ending observation time point;
the power factor index has a calculation expression as follows:
where P represents active power, S represents apparent power, and θ represents a phase difference between voltage and current.
4. A charging pile charging control system according to claim 3, characterized in that: the calculation expression of the total harmonic distortion rate is as follows:
where Vh denotes an effective value of each harmonic voltage, vn denotes an effective value of the fundamental wave voltage, vm denotes an effective value of the highest harmonic voltage, and V1 denotes an effective value of the fundamental wave voltage.
5. The charging pile charging control system according to claim 4, wherein: the calculation expression of the environment influence power floating index is as follows:
g (t) is the real-time output power variation of the power grid, [ t ] x ，t y ]For the early warning period of the environmental temperature of the charging pile, [ t ] i ，t j ]And (5) a time period for early warning the ambient humidity of the charging pile.
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