CN117394499A - Charging control method and device, electronic equipment and storage medium - Google Patents

Charging control method and device, electronic equipment and storage medium Download PDF

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Publication number
CN117394499A
CN117394499A CN202311533616.0A CN202311533616A CN117394499A CN 117394499 A CN117394499 A CN 117394499A CN 202311533616 A CN202311533616 A CN 202311533616A CN 117394499 A CN117394499 A CN 117394499A
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China
Prior art keywords
data
compensation
charging pile
power data
voltage
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CN202311533616.0A
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Inventor
顾映彬
黄培锋
吴超杭
方怡苑
翁佳
陈觉非
陈柏良
苏锦崇
王涓
王晓丰
许映春
邱灿树
陈陆野
唐力则
张瀚
黄树强
刘塽
苏敏锐
郑锦泉
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Guangdong Power Grid Co Ltd
Chaozhou Power Supply Bureau of Guangdong Power Grid Co Ltd
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Guangdong Power Grid Co Ltd
Chaozhou Power Supply Bureau of Guangdong Power Grid Co Ltd
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Priority to CN202311533616.0A priority Critical patent/CN117394499A/en
Publication of CN117394499A publication Critical patent/CN117394499A/en
Pending legal-status Critical Current

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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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • 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
    • 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
    • H02J3/002—Flicker reduction, e.g. compensation of flicker introduced by non-linear load
    • 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
    • H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
    • 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
    • H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
    • 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
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381—Dispersed generators
    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H02J2300/22—The renewable source being solar energy
    • H02J2300/24—The renewable source being solar energy of photovoltaic origin
    • 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
    • H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
    • H02J2310/40—The network being an on-board power network, i.e. within a vehicle
    • H02J2310/48—The network being an on-board power network, i.e. within a vehicle for electric vehicles [EV] or hybrid vehicles [HEV]
    • 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
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • 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
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • 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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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The application discloses a charging control method, a charging control device, a charging control system and a storage medium. The method comprises the following steps: acquiring first electric power data of a power grid side and a charging pile side at a target moment, and judging whether to perform voltage and current compensation on the charging pile side according to the first electric power data; if the voltage and current compensation is carried out on the charging pile side, second power data of the unified quality regulating circuit at the target moment is obtained, and a prediction equation of compensation data at the next moment of the target moment is determined according to the first power data and the second power data; and determining a control model according to the prediction equation and the expected track of the compensation data, and controlling the unified quality control circuit according to the control model so as to compensate the voltage and the current of the charging pile side through the unified quality control circuit. According to the scheme, the unified quality adjusting circuit is controlled through the control model, so that the unified quality adjusting circuit compensates the voltage and the current of the charging pile side, and the stability of the charging system can be enhanced.

Description

Charging control method and device, electronic equipment and storage medium
Technical Field
The present disclosure relates to the field of power technologies, and in particular, to a charging control method, a charging control device, an electronic device, and a storage medium.
Background
To promote the achievement of the 'double carbon' target, new energy power generation represented by photovoltaic and high-permeability access of a nonlinear charging pile represented by an electric automobile in a power system are one of important features of a future power grid. Due to the characteristics of nonlinearity and strong coupling of power electronic equipment, interaction among a nonlinear charging pile, photovoltaics and a power grid can cause system oscillation, and three-phase imbalance phenomena can be generated by power grid faults and unbalanced load access. The unbalance of the three phases can cause the increase of the network loss of the power grid, influence relay protection actions, possibly cause abnormal operation and even damage of sensitive loads, and form risks for the power grid and linked equipment.
Disclosure of Invention
The application provides a charging control method, a device, a system and a storage medium, wherein a unified quality adjusting circuit is controlled through a control model, so that the unified quality adjusting circuit compensates voltage and current on a charging pile side, and the stability of a charging system can be enhanced.
According to an aspect of the present application, there is provided a charge control method including:
acquiring first power data of a power grid side and a charging pile side at a target moment, and judging whether to perform voltage and current compensation on the charging pile side according to the first power data; wherein the first power data includes voltage data and current data;
if the voltage and current compensation is carried out on the charging pile side, second power data of the unified quality regulating circuit at the target moment is obtained, and a prediction equation of compensation data at the next moment of the target moment is determined according to the first power data and the second power data; wherein the second power data comprises voltage data and current data at output nodes of a series compensation circuit and a parallel compensation circuit in the unified quality conditioning circuit;
and determining a control model according to the prediction equation and an expected track of the compensation data, and controlling the unified quality control circuit according to the control model so as to compensate the voltage and the current of the charging pile side through the unified quality control circuit.
According to another aspect of the present application, there is provided a charge control device including:
the power compensation judging module is used for acquiring first power data of a power grid side and a charging pile side and judging whether to carry out voltage and current compensation on the charging pile side according to the first power data; wherein the first power data includes voltage data and current data;
the prediction equation determining module is used for acquiring second power data of the unified quality adjusting circuit at a target moment if voltage and current compensation is determined to be carried out on the charging pile side, and determining a prediction equation of compensation data at the next moment of the target moment according to the first power data and the second power data; wherein the second power data comprises voltage data and current data at output nodes of a series compensation circuit and a parallel compensation circuit in the unified quality conditioning circuit;
and the adjusting circuit control module is used for determining a control model according to the prediction equation and the expected track of the compensation data, and controlling the unified quality adjusting circuit according to the control model so as to compensate the voltage and the current of the charging pile side through the unified quality adjusting circuit.
According to another aspect of the present application, there is provided an electronic device including:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein,
the memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the charge control method according to any one of the embodiments of the present invention.
According to another aspect of the present application, there is provided a computer readable storage medium storing computer instructions for causing a processor to execute a charge control method according to any one of the embodiments of the present invention.
According to the technical scheme, first power data of a power grid side and a charging pile side at a target moment are obtained, and whether voltage and current compensation is carried out on the charging pile side is judged according to the first power data; wherein the first power data includes voltage data and current data; if the voltage and current compensation is carried out on the charging pile side, second power data of the unified quality regulating circuit at the target moment is obtained, and a prediction equation of compensation data at the next moment of the target moment is determined according to the first power data and the second power data; wherein the second power data comprises voltage data and current data at output nodes of a series compensation circuit and a parallel compensation circuit in the unified quality conditioning circuit; and determining a control model according to the prediction equation and the expected track of the compensation data, and controlling the unified quality control circuit according to the control model so as to compensate the voltage and the current of the charging pile side through the unified quality control circuit. According to the technical scheme, the unified quality adjusting circuit is controlled through the control model, so that the unified quality adjusting circuit compensates voltage and current on the charging pile side, and the stability of a charging system can be enhanced.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of a charging control method according to a first embodiment of the present application;
fig. 2 is a flowchart of a charging control method according to a second embodiment of the present application;
fig. 3 is a schematic structural diagram of a charging control device according to a third embodiment of the present application;
fig. 4 is a schematic structural diagram of an electronic device implementing the charge control method according to the embodiment of the present application.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled 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.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
Fig. 1 is a flowchart of a charging control method according to an embodiment of the present application, where the method may be performed by a charging control device, the charging control device may be implemented in hardware and/or software, and the charging control device may be configured in an electronic device. As shown in fig. 1, the method includes:
s110, acquiring first power data of a power grid side and a charging pile side at a target moment, and judging whether to perform voltage and current compensation on the charging pile side according to the first power data; wherein the first power data includes voltage data and current data.
The first power data may be divided into voltage data and current data according to the data property, and the first power data of the grid side and the charging pile side at the target time is obtained, that is, the three-phase voltage 2 at the grid side at the target time is obtained sa ，V sb ，V sc Three-phase current i on the grid side sa ，i sb ，i sc Three-phase voltage V on charging pile side La ，V Lb ，V Lc Three-phase current i on charging pile side La ，i Lb ，i Lc 。
The first power data comprises power grid power data and charging pile power data, namely, the first power data can be divided into the power grid power data and the charging pile power data according to the power grid side and the charging pile side, and whether to perform voltage and current compensation on the charging pile side is judged according to the first power data, namely, whether to perform voltage and current compensation on the charging pile side is judged according to the power grid power data and the charging pile power data which are divided by the first power data.
Specifically, according to the first power data, determining whether to perform voltage and current compensation on the charging pile side includes: determining whether a difference value between the grid power data of the grid side and the charging pile power data of the charging pile side is larger than a preset difference value; if so, determining to perform voltage and current compensation on the charging pile side.
Wherein the difference between the grid power data and the charging pile power data comprises a three-phase voltage difference E v (k) And three-phase current difference E i (k) When the three-phase voltage difference E v (k) When the current difference is larger than the preset difference, the voltage compensation is carried out on the charging pile side, and when the three-phase current difference E is larger than the preset difference i (k) And when the current compensation is larger than the preset difference value, determining to carry out current compensation on the charging pile side. The magnitude of the preset difference value can be adjusted according to practical situations, which is not limited in the application.
S120, if the voltage and current compensation is carried out on the charging pile side, second power data of a unified quality adjusting circuit at a target moment are obtained, and a prediction equation of compensation data at the next moment of the target moment is determined according to the first power data and the second power data; wherein the second power data includes voltage data and current data at output nodes of the series compensation circuit and the parallel compensation circuit in the unified quality conditioning circuit.
The unified quality adjusting circuit comprises a series compensation circuit, a parallel compensation circuit and a capacitor connected with the two compensation circuits in parallel.
The second power data can be divided into voltage data and current data according to data properties, wherein the voltage data and the current data at output nodes of the series compensation circuit and the parallel compensation circuit in the unified quality conditioning circuit are included.
In the embodiment of the present application, when determining to perform voltage and current compensation on the charging pile side, it is necessary to obtain the second power data of the unified quality conditioning circuit at the target time, that is, the three-phase current i at the output node of the series compensation circuit at the target time 1a ，i 1b ，i 1c Three at the output node of the series compensation circuitPhase voltage V 1a ，V 1b ，V 1c Three-phase current i at the output node of the parallel compensation circuit 2a ，i 2b ，i 2c Three-phase voltage V at output node of parallel compensation circuit 2a ，V 2b ，V 2c Three-phase compensation current i of unified power quality regulating circuit to charging pile side ca ，i cb ，i cc Three-phase compensation voltage V of unified power quality regulating circuit to charging pile side ca ，V cb ，V cc . After the second power data of the unified quality conditioning circuit at the target time is acquired, a prediction equation of the compensation data at the next time of the target time may be determined in combination with the first power data acquired in step S110.
And S130, determining a control model according to a prediction equation and an expected track of compensation data, and controlling the unified quality control circuit according to the control model so as to compensate voltage and current on the charging pile side through the unified quality control circuit.
Where the desired trajectory refers to the evolution trajectory or development path that is desired in an ideal case in a certain system. In the embodiment of the present application, the expected track of the compensation data is the value of the three-phase voltage and the three-phase current that compensate the charging pile side under ideal conditions, that is, the three-phase voltage difference E between the grid power data of the grid side and the charging pile power data of the charging pile test v (k) Three-phase current difference E i (k) The expression can be expressed by the following formula:
in the embodiment of the present application, after determining the prediction equation of the compensation data at the next time of the target time, the control model may be determined according to the prediction equation and the expected track of the compensation data at the next time of the target time, and the unified quality control circuit may be controlled according to the control model, so as to compensate the voltage and the current of the charging pile side through the unified quality control circuit. Compared with the traditional control method, the control model is used for controlling and adjusting the unified quality adjusting circuit, the precision requirement on parameters is lower, the robustness is strong, the processing capacity is strong under the constraint condition, and the control model has good processing effect on the condition of multiple input and multiple output. Meanwhile, the control method reduces the control complexity, has good tracking performance and strong anti-interference capability, and improves the stability of the power grid under various complex conditions.
According to the technical scheme, first power data of a power grid side and a charging pile side at a target moment are obtained, and whether voltage and current compensation is carried out on the charging pile side is judged according to the first power data; wherein the first power data includes voltage data and current data; if the voltage and current compensation is carried out on the charging pile side, second power data of the unified quality regulating circuit at the target moment is obtained, and a prediction equation of compensation data at the next moment of the target moment is determined according to the first power data and the second power data; wherein the second power data comprises voltage data and current data at output nodes of a series compensation circuit and a parallel compensation circuit in the unified quality conditioning circuit; and determining a control model according to the prediction equation and the expected track of the compensation data, and controlling the unified quality control circuit according to the control model so as to compensate the voltage and the current of the charging pile side through the unified quality control circuit. According to the technical scheme, the unified quality adjusting circuit is controlled through the control model, so that the unified quality adjusting circuit compensates voltage and current on the charging pile side, and the stability of a charging system can be enhanced.
Example two
Fig. 2 is a flowchart of a charging control method according to a second embodiment of the present application, where the embodiments of the present application are optimized based on the foregoing embodiments, and a scheme not described in detail in the embodiments of the present application is shown in the foregoing embodiments. As shown in fig. 2, the method includes:
s210, acquiring first power data of a power grid side and a charging pile side at a target moment, and judging whether to perform voltage and current compensation on the charging pile side according to the first power data; wherein the first power data includes voltage data and current data.
And S220, if the voltage and current compensation is determined to be carried out on the charging pile side, acquiring second power data of the unified quality regulating circuit at the target moment.
S230, constructing a state space equation set according to the first power data and the second power data.
In this embodiment of the present application, after the first power data and the second power data are acquired, an equation set may be constructed based on kirchhoff's law according to the first power data and the second power data as follows:
wherein L is 1 Equivalent inductance of series compensation circuit, V dc For the voltage of the capacitor connected in parallel with the two compensation circuits, N is the phase change ratio of the transformer, L 2 Is the equivalent inductance of the parallel compensation circuit, R is the equivalent inductance L 2 Impedance of C 1 Is the equivalent capacitance of the series compensation circuit, C 2 Equivalent capacitance of parallel compensation circuit, C dc For capacitors connected in parallel with two compensation circuits, T 1 -T 6 Then it represents the different switching tubes in the unified quality conditioning circuit.
The above equation set may be written as:
wherein x= (i) 1a ，i 1b ，i 1c ，i 2a ，i 2b ，i 2c ，V ca ，V cb ，V cc ，V 1a ，V 1b ，V 1c ，i ca ，i cb ，i cc ，V dc )，
y＝(V ca ，V cb ，V cc ，i ca ，i cb ，i cc )，
u＝(T 1 ，T 2 ，T 3 ，T 4 ，T 5 ，T 6 )，
v＝(i sa ，i sb ，i sc )，
S240, converting the state space equation set into an incremental model through multi-element Taylor expansion, calculating coefficients of a prediction equation according to the incremental model, and determining the prediction equation.
In the embodiment of the application, before the state space equation set is converted into the incremental model through multi-element Taylor expansion, the unified power quality adjusting circuit is required to compensate the three-phase compensation current i on the charging pile side ck (k=a, b, c) three-phase voltage V at the output node of the series compensation circuit 1k (k=a, b, c) into the system of equations, the result is as follows:
converting the state space equation set into an incremental model through multi-element Taylor expansion:
wherein Deltax (k) is the flow-through equivalent inductance L at time k 1 Is of three-phase current i 1k (k=a, b, c), flowing through the equivalent inductance L 2 Is of three-phase current i 2k (k=a, b, c), three-phase compensation current i of unified power quality conditioning circuit to charging pile side ck (k=a, b, c), three-phase compensation voltage V of unified power quality conditioning circuit for charging pile side ck (k=a, b, c), voltage V of capacitor connected in parallel with two compensation circuits dc Three-phase voltage V at output node of series compensation circuit 1k Increment of (k=a, b, c). Grid-side three-phase current i with Δv (k) being k time Lk Increment of (k=a, b, c). Deltau (k) is the increment of the switching tube duty cycle at time k.
In the embodiment of the present application, the prediction equation is used to predict the compensation data at the next time of the target time, that is, the three-phase compensation current i of the unified power quality control circuit at the next time of the predicted target time to the charging pile side ca ，i cb ，i cc Three-phase compensation voltage V ca ，V cb ，V cc The formula is as follows: y is Y p (k+1|k)＝S x Δx(k)+S v Δv(k)+S u Deltau (k), wherein Y p (k+ 1|k) is the predicted value of the compensation data at the time next to the target time. After the state equation set is converted into the incremental model, the coefficient S of the prediction equation can be calculated according to the incremental model x 、S v S and S u Thereby determining a predictive equation.
S250, determining a control model according to the prediction equation and the expected track of the compensation data, and determining the control quantity through the control model.
In the embodiment of the application, after the prediction equation is determined, the control model can be determined according to the prediction equation and the expected track, and the control quantity is determined through the control model.
Specifically, determining a control model from the prediction equation and the desired trajectory of the compensation data, and determining a control amount by the control model, includes: constructing an error function according to the coefficient of the prediction equation and the expected track of the compensation data, and determining a control model according to the error function; and solving the control model under the constraint state, and determining the control quantity.
In the embodiment of the application, an error function can be constructed according to the coefficient of the prediction equation and the expected track of the compensation data, and a control model is determined according to the error function. The formulas of the error function and the control model are as follows:
E p (k+1|k)＝R(k+1)-S x Δx(k)-S v Δv(k)-Iy c (k)，
ΔU(k)＝K mpc *E p (k+1|k)，
wherein E is p (k+ 1|k) is an error function, R (k+1) is an expected trajectory of the compensation data, deltau (K) is a control model, K mpc In order to predict the control gain,
after the control model is determined, the control model under the constraint state can be solved, and the control quantity is determined.
Specifically, solving the control model under the constraint state, and determining the control quantity includes: converting the control model in the solving constraint state into a quadratic programming problem according to the prediction equation, and judging whether the quadratic programming problem has a solution or not; if yes, determining the solution of the quadratic programming problem as the control quantity.
In the embodiment of the application, the control model under the constraint state can be solved according to the prediction equation and converted into the quadratic programming problem, namely min ΔU(k) J(x(k)，ΔU(k))＝||τ y (Y p (k+1|k)-R(k+1))|| 2 +||τ u ΔU(k)|| 2 When the quadratic programming problem has no solution, the control fails, and when the quadratic programming problem has a solution, the solution of the quadratic programming problem is determined to be the control quantity.
And S260, applying the control quantity to the unified quality control circuit so as to compensate the voltage and the current of the charging pile side through the unified quality control circuit.
In the embodiment of the application, after the control quantity acts on the unified quality control circuit, voltage and current compensation can be performed on the charging pile side through the unified quality control circuit.
Specifically, the control amount is applied to the unified mass conditioning circuit to perform voltage and current compensation on the charging pile side through the unified mass conditioning circuit, including: substituting the control quantity into a control model to determine a target value of the compensation data; transmitting the control quantity to a pulse width modulation wave driving module in the unified quality regulating circuit to obtain a pulse modulation wave signal; the pulse modulation wave signal is acted on at least one switching tube in the unified quality adjusting circuit, so that the unified quality adjusting circuit is controlled by the at least one switching tube to output compensation voltage and compensation current corresponding to the target value of the compensation data, and the voltage and current compensation is carried out on the charging pile side.
In the embodiment of the application, the solution of the quadratic programming problem is substituted into the control model, so that the target value of the compensation data, namely the optimal solution of the three-phase voltage and the three-phase current for compensating the charging pile side, can be determined. And meanwhile, at least one switching tube in the unified quality regulating circuit is controlled by the control quantity, so that the voltage and the current output by the unified quality regulating circuit are converted into the compensation voltage and the compensation current corresponding to the target value of the compensation data through the regulation of the at least one switching tube, and the voltage and the current compensation is carried out on the charging pile side.
According to the technical scheme, first power data of a power grid side and a charging pile side at a target moment are obtained, and whether voltage and current compensation is carried out on the charging pile side is judged according to the first power data; wherein the first power data includes voltage data and current data; if the voltage and current compensation is carried out on the charging pile side, obtaining second power data of the unified quality regulating circuit at the target moment; constructing a state space equation set according to the first power data and the second power data; converting the state space equation set into an incremental model through multi-element Taylor expansion, calculating coefficients of a prediction equation according to the incremental model, and determining the prediction equation; determining a control model according to the prediction equation and the expected track of the compensation data, and determining a control quantity through the control model; the control quantity is acted on the unified quality control circuit to compensate the voltage and the current of the charging pile side through the unified quality control circuit. According to the technical scheme, the unified quality adjusting circuit is controlled through the control model, so that the unified quality adjusting circuit compensates voltage and current on the charging pile side, and the stability of a charging system can be enhanced.
Example III
Fig. 3 is a schematic structural diagram of a charging control device according to a third embodiment of the present application. As shown in fig. 3, the apparatus includes:
the power compensation judging module 310 is configured to obtain first power data of the power grid side and the charging pile side, and judge whether to perform voltage and current compensation on the charging pile side according to the first power data; wherein the first power data includes voltage data and current data;
the prediction equation determining module 320 is configured to obtain second power data of the unified quality adjusting circuit at a target moment if it is determined that voltage and current compensation is performed on the charging pile side, and determine a prediction equation of compensation data at a next moment of the target moment according to the first power data and the second power data; wherein the second power data comprises voltage data and current data at output nodes of a series compensation circuit and a parallel compensation circuit in the unified quality conditioning circuit;
and the adjusting circuit control module 330 is configured to determine a control model according to the prediction equation and the expected track of the compensation data, and control the unified quality adjusting circuit according to the control model, so as to compensate the voltage and the current of the charging pile side through the unified quality adjusting circuit.
Optionally, the first power data includes grid power data and charging pile power data;
the power compensation judging module 310 is configured to:
determining whether a difference value between the grid power data of the grid side and the charging pile power data of the charging pile side is larger than a preset difference value;
if yes, determining to carry out voltage and current compensation on the charging pile side.
Optionally, the predictive equation determination module 320 includes:
the state equation set construction unit is used for constructing a state space equation set according to the first power data and the second power data;
and the prediction equation determining unit is used for converting the state space equation set into an incremental model through multi-element Taylor expansion, calculating coefficients of the prediction equation according to the incremental model and determining the prediction equation.
Optionally, the conditioning circuit control module 330 includes:
a control amount determining unit configured to determine a control model based on the predictive equation and an expected trajectory of the compensation data, and determine a control amount by the control model;
and the regulating circuit control unit is used for acting the control quantity on the unified quality regulating circuit so as to compensate the voltage and the current of the charging pile side through the unified quality regulating circuit.
Optionally, the control amount determining unit includes:
a control model determining subunit, configured to construct an error function according to the coefficient of the prediction equation and the expected track of the compensation data, and determine a control model according to the error function;
and the control quantity determining subunit is used for solving the control model under the constraint state and determining the control quantity.
Optionally, the control amount determining subunit is specifically configured to:
converting a control model in a solving constraint state into a quadratic programming problem according to the prediction equation, and judging whether the quadratic programming problem has a solution or not;
if yes, determining the solution of the quadratic programming problem as the control quantity.
Optionally, the adjusting circuit control unit includes:
a target value determination subunit, configured to substitute the control amount into the control model, and determine a target value of the compensation data;
the signal determining subunit is used for transmitting the control quantity to a pulse width modulation wave driving module in the unified quality regulating circuit to obtain a pulse modulation wave signal;
and the regulating circuit control subunit is used for acting the pulse modulation wave signal on at least one switching tube in the unified quality regulating circuit so as to control the unified quality regulating circuit to output the compensating voltage and compensating current corresponding to the target value of the compensating data through the at least one switching tube and perform voltage and current compensation on the charging pile side.
The charging control device provided by the embodiment of the application can execute the charging control method provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method.
Example IV
Fig. 4 shows a schematic diagram of the structure of an electronic device 10 that may be used to implement embodiments of the present application. Electronic devices are intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. Electronic equipment may also represent various forms of mobile devices, such as personal digital processing, cellular telephones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be exemplary only, and are not meant to limit implementations of the inventions described and/or claimed herein.
As shown in fig. 4, the electronic device 10 includes at least one processor 11, and a memory, such as a Read Only Memory (ROM) 12, a Random Access Memory (RAM) 13, etc., communicatively connected to the at least one processor 11, in which the memory stores a computer program executable by the at least one processor, and the processor 11 may perform various appropriate actions and processes according to the computer program stored in the Read Only Memory (ROM) 12 or the computer program loaded from the storage unit 18 into the Random Access Memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 may also be stored. The processor 11, the ROM 12 and the RAM 13 are connected to each other via a bus 14. An input/output (I/O) interface 15 is also connected to bus 14.
Various components in the electronic device 10 are connected to the I/O interface 15, including: an input unit 16 such as a keyboard, a mouse, etc.; an output unit 17 such as various types of displays, speakers, and the like; a storage unit 18 such as a magnetic disk, an optical disk, or the like; and a communication unit 19 such as a network card, modem, wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information/data with other devices via a computer network, such as the internet, and/or various telecommunication networks.
The processor 11 may be a variety of general and/or special purpose processing components having processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), various specialized Artificial Intelligence (AI) computing chips, various processors running machine learning model algorithms, digital Signal Processors (DSPs), and any suitable processor, controller, microcontroller, etc. The processor 11 performs the respective methods and processes described above, such as a charge control method.
In some embodiments, the charge control method may be implemented as a computer program tangibly embodied on a computer-readable storage medium, such as the storage unit 18. In some embodiments, part or all of the computer program may be loaded and/or installed onto the electronic device 10 via the ROM 12 and/or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the charge control method described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to perform the charge control method in any other suitable way (e.g., by means of firmware).
Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuit systems, field Programmable Gate Arrays (FPGAs), application Specific Integrated Circuits (ASICs), application Specific Standard Products (ASSPs), systems On Chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs, the one or more computer programs may be executed and/or interpreted on a programmable system including at least one programmable processor, which may be a special purpose or general-purpose programmable processor, that may receive data and instructions from, and transmit data and instructions to, a storage system, at least one input device, and at least one output device.
A computer program for carrying out the methods of the present application may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the computer programs, when executed by the processor, cause the functions/acts specified in the flowchart and/or block diagram block or blocks to be implemented. The computer program may execute entirely on the machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
In the context of this application, a computer-readable storage medium may be a tangible medium that can contain, or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. The computer readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, the computer readable storage medium may be a machine readable signal medium. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
To provide for interaction with a user, the systems and techniques described here can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and a pointing device (e.g., a mouse or a trackball) through which a user can provide input to the electronic device. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic input, speech input, or tactile input.
The systems and techniques described here can be implemented in a computing system that includes a background component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such background, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), wide Area Networks (WANs), blockchain networks, and the internet.
The computing system may include clients and servers. The client and server are typically remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also called a cloud computing server or a cloud host, and is a host product in a cloud computing service system, so that the defects of high management difficulty and weak service expansibility in the traditional physical hosts and VPS service are overcome.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present application may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present invention can be achieved, and the present invention is not limited herein.
The above embodiments do not limit the scope of the application. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present application.

Claims (10)

1. A method of charge control, the method comprising:
acquiring first power data of a power grid side and a charging pile side at a target moment, and judging whether to perform voltage and current compensation on the charging pile side according to the first power data; wherein the first power data includes voltage data and current data;
if the voltage and current compensation is carried out on the charging pile side, second power data of the unified quality regulating circuit at the target moment is obtained, and a prediction equation of compensation data at the next moment of the target moment is determined according to the first power data and the second power data; wherein the second power data comprises voltage data and current data at output nodes of a series compensation circuit and a parallel compensation circuit in the unified quality conditioning circuit;
and determining a control model according to the prediction equation and an expected track of the compensation data, and controlling the unified quality control circuit according to the control model so as to compensate the voltage and the current of the charging pile side through the unified quality control circuit.
2. The method of claim 1, wherein the first power data comprises grid power data and charging pile power data;
judging whether to perform voltage and current compensation on the charging pile side according to the first power data, including:
determining whether a difference value between the grid power data of the grid side and the charging pile power data of the charging pile side is larger than a preset difference value;
if yes, determining to carry out voltage and current compensation on the charging pile side.
3. The method of claim 1, wherein determining a predictive equation for compensation data for a time next to the target time based on the first power data and the second power data comprises:
constructing a state space equation set according to the first power data and the second power data;
and converting the state space equation set into an incremental model through multi-element Taylor expansion, calculating coefficients of the prediction equation according to the incremental model, and determining the prediction equation.
4. The method according to claim 1, wherein the determining a control model from the prediction equation and the desired trajectory of the compensation data, and controlling the unified mass conditioning circuit according to the control model to perform voltage and current compensation on the charging pile side by the unified mass conditioning circuit, comprises:
determining a control model according to the prediction equation and the expected track of the compensation data, and determining a control quantity through the control model;
and the control quantity is acted on the unified quality regulating circuit so as to carry out voltage and current compensation on the charging pile side through the unified quality regulating circuit.
5. The method of claim 4, wherein the determining a control model from the predictive equation and the desired trajectory of the compensation data and determining the control quantity from the control model comprises:
constructing an error function according to the coefficient of the prediction equation and the expected track of the compensation data, and determining a control model according to the error function;
and solving the control model under the constraint state, and determining the control quantity.
6. The method of claim 5, wherein solving the control model under constraint conditions to determine the control quantity comprises:
converting a control model in a solving constraint state into a quadratic programming problem according to the prediction equation, and judging whether the quadratic programming problem has a solution or not;
if yes, determining the solution of the quadratic programming problem as the control quantity.
7. The method according to claim 4, wherein said applying the control amount to the unified mass conditioning circuit to compensate for voltage and current on the charging pile side by the unified mass conditioning circuit includes:
substituting the control quantity into the control model to determine a target value of the compensation data;
transmitting the control quantity to a pulse width modulation wave driving module in the unified quality regulating circuit to obtain a pulse modulation wave signal;
and the pulse modulation wave signal is acted on at least one switching tube in the unified quality regulating circuit, so that the unified quality regulating circuit is controlled to output compensation voltage and compensation current corresponding to the target value of the compensation data through the at least one switching tube, and the voltage and current compensation is carried out on the charging pile side.
8. A charge control device, the device comprising:
the power compensation judging module is used for acquiring first power data of a power grid side and a charging pile side and judging whether to carry out voltage and current compensation on the charging pile side according to the first power data; wherein the first power data includes voltage data and current data;
the prediction equation determining module is used for acquiring second power data of the unified quality adjusting circuit at a target moment if voltage and current compensation is determined to be carried out on the charging pile side, and determining a prediction equation of compensation data at the next moment of the target moment according to the first power data and the second power data; wherein the second power data comprises voltage data and current data at output nodes of a series compensation circuit and a parallel compensation circuit in the unified quality conditioning circuit;
and the adjusting circuit control module is used for determining a control model according to the prediction equation and the expected track of the compensation data, and controlling the unified quality adjusting circuit according to the control model so as to compensate the voltage and the current of the charging pile side through the unified quality adjusting circuit.
9. An electronic device, the electronic device comprising:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein,
the memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the charge control method of any one of claims 1-7.
10. A computer readable storage medium storing computer instructions for causing a processor to implement the charge control method of any one of claims 1-7 when executed.
CN202311533616.0A 2023-11-16 2023-11-16 Charging control method and device, electronic equipment and storage medium Pending CN117394499A (en)

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Application Number Priority Date Filing Date Title
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