CN112572226A - Charging and discharging control method and charging and discharging pile - Google Patents
Charging and discharging control method and charging and discharging pile Download PDFInfo
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- CN112572226A CN112572226A CN202011507288.3A CN202011507288A CN112572226A CN 112572226 A CN112572226 A CN 112572226A CN 202011507288 A CN202011507288 A CN 202011507288A CN 112572226 A CN112572226 A CN 112572226A
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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
- B60L55/00—Arrangements for supplying energy stored within a vehicle to a power network, i.e. vehicle-to-grid [V2G] arrangements
Abstract
The invention discloses a charge and discharge control method and a charge and discharge pile, wherein the method comprises the steps of receiving electric energy parameters and a discharge instruction sent by an electric automobile, wherein the electric energy parameters comprise frequency, amplitude and phase; detecting electric energy parameters of a power grid, and judging whether the frequency and the amplitude of the power grid are consistent with those of the electric automobile or not; if the phase difference between the power grid and the electric vehicle meets the preset condition, judging whether the phase difference between the power grid and the electric vehicle meets the preset condition; if yes, switching on a discharge channel and entering a discharge state; and if the phase difference does not meet the preset condition, sending a phase adjustment instruction to the electric automobile so that the electric automobile adjusts the electric energy signal based on the phase adjustment instruction until the phase difference meets the preset condition. The invention discloses a charging and discharging control method and a charging and discharging pile, which aim to solve or partially solve the technical problem of high discharging risk caused by the immaturity of the existing discharging technology.
Description
Technical Field
The application relates to the technical field of charging of new energy automobiles, in particular to a charging and discharging control method and a charging and discharging pile.
Background
With the improvement of environmental protection requirements, new energy automobiles are more and more popular. The electrical energy reserve of electric vehicles or plug-in hybrid vehicles is enormous. How to utilize these power reserves becomes a matter of consideration. For example, if the load of the power grid is low, the electric vehicle or the plug-in hybrid electric vehicle can be used as the energy storage device, so as to avoid the waste of resources. When the load of the power grid is high, the stored energy of the electric vehicle or the plug-in hybrid electric vehicle is fed back to the power grid in time, so that the effect of peak load shifting and valley filling is achieved, and the safe and efficient operation of the power grid system can be improved.
However, the current research direction is still charging an electric vehicle or a plug-in hybrid electric vehicle, and the technology of discharging the electric vehicle or the plug-in hybrid electric vehicle as an energy storage source is not mature, so that the discharging risk is high.
Disclosure of Invention
The invention provides a charge-discharge control method and a charge-discharge pile, which aim to solve or partially solve the technical problem of high discharge risk caused by the immaturity of the existing discharge technology.
In order to solve the technical problem, the invention provides a charge and discharge control method, which comprises the following steps:
receiving electric energy parameters and a discharge instruction sent by an electric automobile, wherein the electric energy parameters comprise frequency, amplitude and phase;
detecting electric energy parameters of a power grid, and judging whether the frequency and the amplitude of the power grid are consistent with those of the electric automobile or not;
if the phase difference between the power grid and the electric vehicle meets the preset condition, judging whether the phase difference between the power grid and the electric vehicle meets the preset condition;
if yes, switching on a discharge channel and entering a discharge state;
if the phase difference meets the preset condition, sending a phase adjustment instruction to the electric automobile so that the electric automobile adjusts the electric energy signal of the electric automobile based on the phase adjustment instruction until the phase difference meets the preset condition;
the main controller is connected with the three-phase incoming line switch and used for detecting the electric energy parameters of the power grid.
Optionally, the sending the phase adjustment command to the electric vehicle includes:
converting the phase difference into a duty ratio signal, and sending the duty ratio signal to the electric automobile through a charging gun CP contact point, so that the electric automobile adjusts a phase value of an electric energy parameter based on the duty ratio signal.
Optionally, the determining whether the phase difference between the power grid and the electric vehicle meets a preset condition includes:
and judging whether the phase difference between the power grid and the electric automobile is less than 1%.
Optionally, if it is determined that any one of the parameters of the frequency and the amplitude of the power grid is inconsistent with the frequency and the amplitude of the electric vehicle, the method further includes:
forbidding to switch on the discharge channel, and displaying forbidding information forbidding to switch on the discharge channel and forbidding reason information, wherein the forbidding reason information comprises frequency inconsistency and amplitude inconsistency.
Optionally, after entering the discharging state, the method further includes:
detecting whether any one of the current electric energy parameters of the power grid and the electric vehicle does not accord with a discharging condition in real time;
and if one parameter does not meet the discharge condition, controlling the electric automobile to be disconnected with the power grid.
The invention also discloses a charging and discharging pile, which comprises:
the parameter receiving unit is used for receiving electric energy parameters and a discharging instruction sent by the electric automobile, wherein the electric energy parameters comprise frequency, amplitude and phase;
the first parameter judgment unit is used for detecting electric energy parameters of a power grid and judging whether the frequency and the amplitude of the power grid are consistent with those of the electric automobile or not;
the second parameter judgment unit is used for judging whether the phase difference between the power grid and the electric vehicle meets a preset condition or not if the phase difference is consistent with the preset condition;
the discharge unit is used for switching on a discharge channel and entering a discharge state if the discharge unit is satisfied;
and the adjusting unit is used for sending a phase adjusting instruction to the electric automobile if the phase difference does not meet the preset condition, so that the electric automobile adjusts the electric energy signal of the electric automobile based on the phase adjusting instruction until the phase difference meets the preset condition.
Optionally, the adjusting unit is configured to convert the phase difference into a duty ratio signal, and send the duty ratio signal to the electric vehicle through a charging gun CP contact point, so that the electric vehicle adjusts a phase value of an electric energy parameter based on the duty ratio signal.
Optionally, the second parameter determining unit is configured to determine whether a phase difference between the power grid and the electric vehicle is less than 1%.
Optionally, the method further includes:
and the discharge forbidding unit is used for forbidding to switch on the discharge channel and displaying forbidding information and forbidding reason information of forbidding to switch on the discharge channel if the frequency and amplitude of the power grid are judged to be inconsistent with any parameters of the frequency and amplitude of the electric vehicle, wherein the forbidding reason information comprises frequency inconsistency and amplitude inconsistency.
Optionally, the method further includes:
the real-time detection unit is used for detecting whether any one of the current electric energy parameters of the power grid and the electric automobile does not accord with a discharge condition in real time after the electric automobile enters a discharge state;
and the discharging disconnection unit is used for controlling the electric automobile to be disconnected with the power grid if one parameter does not accord with the discharging condition.
Through one or more technical schemes of the invention, the invention has the following beneficial effects or advantages:
the invention discloses a charge and discharge control method and a charge and discharge pile, which are used for receiving electric energy parameters and discharge instructions sent by an electric automobile, wherein the electric energy parameters comprise frequency, amplitude and phase; when the frequency and the amplitude of the power grid are detected to be consistent with those of the electric automobile and the phase difference between the power grid and the electric automobile meets a preset condition, switching on a discharge channel and entering a discharge state; if the phase difference between the power grid and the electric automobile does not meet the preset condition, sending a phase adjustment instruction to the electric automobile so that the electric automobile adjusts the electric energy signal of the electric automobile until the phase difference meets the preset condition; therefore, when each parameter in the electric energy parameters of the power grid is matched with the corresponding parameter of the electric automobile, the discharging channel is switched on, and the electric automobile enters a discharging state. The high risk situation is avoided by carrying out triple discharge detection before discharge, so that the electric energy can be fed back to the power grid more safely and reliably, and the discharge risk in the discharge process is reduced.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 shows a schematic view of a charge-discharge pile according to an embodiment of the invention;
fig. 2 shows a method flow diagram of a charge and discharge control method according to an embodiment of the invention;
fig. 3 shows a block diagram of a charge and discharge device according to an embodiment of the present invention.
Description of reference numerals: the charging gun comprises a charging gun 101, a three-phase electric energy meter 102, a three-phase alternating current contactor 103, a three-phase incoming line switch 104, a main controller 105 and a display screen 106.
Detailed Description
In order to make the present application more clearly understood by those skilled in the art to which the present application pertains, the following detailed description of the present application is made with reference to the accompanying drawings by way of specific embodiments.
In the embodiment of the invention, a charging and discharging control method and a charging and discharging pile are provided to solve or partially solve the technical problem of high discharging risk caused by the immaturity of the existing discharging technology.
Specifically, taking the vehicle discharge as an example, the vehicle feeds back excess electrical energy to the process of the grid. In practical application, the electric energy stored in the vehicle is probably different from the electric energy stored in the power grid, and if the electric energy is directly fed back to the power grid through the charging and discharging pile, the charging and discharging pile is probably burnt out, and electric leakage is probably caused. In addition, the alternating current charging and discharging pile on the market does not have both the charging function and the discharging function.
Therefore, in order to solve the above problems, embodiments of the present invention provide a charging/discharging pile, which is specifically an ac charging/discharging pile having a V2G function (Vehicle-to-grid). The charging technology of the present embodiment refers to a technology capable of charging a vehicle and thus realizing a charging function. The discharging technology of the present embodiment refers to a technology of feeding back electric energy to the grid by using the vehicle as a storage energy source.
Next, referring to fig. 1, the charge/discharge pile of the present embodiment will be described in detail.
The charge-discharge pile of this embodiment includes: the charging gun 101, the main controller 105, the three-phase electric energy meter 102, the three-phase AC contactor 103, the three-phase incoming line switch 104, the display screen 106 and the like. The charging gun 101 is connected to an electric vehicle for charging and discharging. And according to a discharging path, the charging gun 101 is sequentially connected with a three-phase electric energy meter 102, a three-phase alternating current contactor 103 and a three-phase incoming line switch 104. In addition, the charging gun 101, the three-phase electric energy meter 102, the three-phase ac contactor 103, and the display screen 106 are connected to the main controller 105 for data transmission or control reception, and the main controller 105 is connected to the three-phase incoming line switch 104 for detecting the electric energy parameters of the power grid.
When the electric automobile is charged, the electric automobile is charged by electric energy provided by a power grid after passing through a three-phase incoming line switch 104, a three-phase alternating current contactor 103, a three-phase electric energy meter 102 and a charging gun 101 in sequence; and when the electric automobile discharges, the electric energy provided by the electric automobile enters the power grid through the charging gun 101, the three-phase electric energy meter 102, the three-phase alternating current contactor 103 and the three-phase incoming line switch 104 in sequence.
Specifically, the main controller 105 is connected to the charging gun 101 and the three-phase incoming line switch 104, and is configured to receive an electric energy parameter of the electric vehicle, a charging/discharging instruction, and an electric energy parameter of the power grid, perform a judgment according to the received parameters, and determine whether to charge the electric vehicle or allow the electric vehicle to discharge according to a judgment result.
Specifically, since the three-phase electric energy meter 102 is connected to the main controller 105, the three-phase electric energy meter 102 mainly plays a role in measuring charge and discharge electric quantity. As an alternative embodiment, the three-phase electric energy meter 102 may generate a prompt signal to be transmitted to the main controller 105, and the prompt signal is transmitted by the main controller 105 to the pile cloud where the charging and discharging pile is located, and the pile cloud is gradually transmitted to the user end to prompt the user to perform the discharging operation. If the user has the operation of confirming the discharging, the operation can be transmitted back to the main controller 105, and the main controller 105 carries out relevant detection on the three-phase power. The following embodiments are described in detail herein and will not be described in detail herein.
As an alternative embodiment, the three-phase electric energy meter 102 may receive a discharging commission calculated by the power grid background according to the discharging power to display to prompt the user.
As an optional embodiment, the charge-discharge pile further includes: the display 106 is connected with the main controller 105 and used for displaying the details of the three-phase electricity which is unqualified when the electric energy detection is unqualified; and the system is used for displaying the discharging commission returned by the power grid background to prompt the user. The discharge commission refers to commission income obtained after the discharge of the vehicle to be discharged.
Specifically, in the charging process, the electric vehicle with charging can be directly charged through the three-phase incoming line switch 104, the three-phase alternating current contactor 103, the three-phase electric energy meter 102 and the charging gun 101. The three-phase electric energy meter 102 obtains the charging capacity and transmits the charging capacity to the main controller 105. The main controller 105 is configured to calculate an amount of money required for charging according to the amount of charged electricity, and display the amount of money required for charging on the display screen 106 to prompt the user to pay. Of course, the main controller 105 may also calculate the charging amount according to the amount of the prepaid fee of the user after the user pays in advance, so as to control the charging gun 101 to charge the electric vehicle according to the charging amount.
Specifically, the main controller 105 receives an electric energy parameter and a discharge instruction sent by the electric vehicle, wherein the electric energy parameter includes frequency, amplitude and phase; when the frequency and the amplitude of the power grid are detected to be consistent with those of the electric automobile and the phase difference between the power grid and the electric automobile meets a preset condition, switching on a discharge channel and entering a discharge state; if the phase difference between the power grid and the electric automobile does not meet the preset condition, sending a phase adjustment instruction to the electric automobile so that the electric automobile performs phase adjustment until the phase difference meets the preset condition; therefore, when each parameter in the electric energy parameters of the power grid is matched with the corresponding parameter of the electric automobile, the discharging channel is switched on, and the electric automobile enters a discharging state. The high risk situation is avoided by carrying out triple discharge detection before discharge, so that the electric energy can be fed back to the power grid more safely and reliably, and the discharge risk in the discharge process is reduced.
The following describes a specific implementation process of the discharge control method using the charge-discharge pile, applied to the main controller 105, as shown in fig. 2, including the following steps:
s201, receiving electric energy parameters and a discharge instruction sent by an electric automobile, wherein the electric energy parameters comprise frequency, amplitude and phase;
s202, detecting electric energy parameters of a power grid, and judging whether the frequency and the amplitude of the power grid are consistent with those of the electric automobile or not;
s203, if the phase difference between the power grid and the electric vehicle is consistent, judging whether the phase difference meets a preset condition;
s204, if yes, switching on a discharge channel and entering a discharge state;
s205, if the phase difference does not meet the preset condition, a phase adjustment instruction is sent to the electric automobile, so that the electric automobile conducts phase adjustment based on the phase adjustment instruction until the phase difference meets the preset condition, wherein the main controller is connected with the three-phase incoming line switch and used for detecting the electric energy parameters of the power grid.
The main controller 105 is connected to the three-phase incoming line switch 104 for detecting the power parameters of the power grid.
In step S201, the main controller 105 receives an electric energy parameter and a discharge instruction sent by the electric vehicle through the charging gun 101, where the electric energy parameter includes a frequency, an amplitude, and a phase of the electric vehicle; the electric energy parameters can also comprise the voltage value, the harmonic content and the like of the electric automobile.
In step S202, since the main controller 105 is connected to the three-phase incoming line switch 104, three-phase electrical sampling can be performed, and electrical energy parameters of the power grid can be obtained. After the main control 105 receives the electric energy parameters of the electric vehicle and the electric energy parameters of the power grid, firstly, whether the frequency and the amplitude of the power grid are consistent with those of the electric vehicle or not is judged, and if so, the step S203 is executed; if the frequency and the amplitude of the power grid are judged to be inconsistent with any parameters of the frequency and the amplitude of the electric automobile, the discharge channel is forbidden to be connected, and forbidden information and forbidden reason information of the discharge channel forbidden to be connected are displayed, wherein the forbidden reason information comprises frequency inconsistency and/or amplitude inconsistency; at this time, the judgment can be carried out again; of course, no operation may be performed.
When the frequency and the amplitude of the power grid are judged to be inconsistent with any parameters of the frequency and the amplitude of the electric automobile, three conditions exist, wherein the first condition is that the frequency of the power grid is inconsistent with the frequency of the electric automobile, and the second condition is that the amplitude of the power grid is inconsistent with the amplitude of the electric automobile; and thirdly, the frequency and the amplitude of the power grid are inconsistent with those of the electric automobile, and when any one of the three conditions is judged to occur, the discharge channel is forbidden to be connected, and the forbidden information and the forbidden reason information of the discharge channel forbidden to be connected are displayed. For example, when it is determined that the frequency of the grid is not consistent with the frequency of the electric vehicle and the amplitude of the grid is consistent with the amplitude of the electric vehicle, the first case is the case, and at this time, a message "discharge is prohibited due to the inconsistency between the frequencies of the grid and the electric vehicle" is displayed on the display screen 106 of the electric vehicle.
When it is determined through step S202 that the frequency and the amplitude of the grid are consistent with those of the electric vehicle, step S203 is performed.
In step S203, it is determined whether the phase difference between the grid and the electric vehicle satisfies a preset condition, wherein the preset condition may be a percentage, such as 1%. And 2% and 3%, etc. are not more than 5% or 10%. Preferably, the preset condition is 1%, and the preset condition is specifically exemplified as 1% below.
Specifically, after the main controller 105 determines that the frequencies and amplitudes of the grid and the electric vehicle are consistent, it is determined whether the phase difference between the grid and the electric vehicle is less than 1%; if the phase difference is less than 1%, determining that the phase difference between the power grid and the electric vehicle meets a preset condition, and executing a step S204; if the phase difference is not less than 1%, determining that the phase difference between the power grid and the electric vehicle does not meet the preset condition, and executing step S205.
If it is determined through step S203 that the phase difference between the grid and the electric vehicle satisfies the preset condition, step S204 is executed.
In step S204, since the frequency and the amplitude of the power grid are consistent with the frequency and the amplitude of the electric vehicle, and the phase difference between the power grid and the electric vehicle satisfies the preset condition, at this time, since each of the power parameters of the power grid and the electric vehicle is matched, at this time, the discharging channel is connected, and the electric vehicle is controlled to enter the discharging state, the probability that the high-risk conditions such as current or voltage is too high due to the inconsistency of a certain parameter in the power parameters of the power grid and the electric vehicle can be effectively reduced, it is ensured that the electric energy can be fed back to the power grid more safely and reliably, and the discharging risk in the discharging process is reduced.
If it is determined through step S203 that the phase difference between the grid and the electric vehicle does not satisfy the preset condition, step S205 is executed.
Specifically, the main controller 105 may convert the phase difference into a duty signal and transmit the duty signal to the electric vehicle through the contact point of the charging gun CP, so that the electric vehicle performs phase adjustment based on the duty signal until the phase difference satisfies a preset condition, and when the preset condition is satisfied, perform step S204.
In another embodiment of the specification, after the electric vehicle enters the discharging state, whether any one of the electric energy parameters of the power grid and the electric vehicle does not accord with the discharging condition can be detected in real time; and if one parameter does not accord with the discharge condition, controlling the electric automobile to be disconnected with the power grid. The power parameters include current frequency, amplitude and phase.
Specifically, in the process of detecting whether any one of the electric energy parameters of the power grid and the electric automobile does not accord with the discharge condition in real time, detecting whether the current frequency and the current amplitude of the power grid are consistent with the current frequency and the current amplitude of the electric automobile, and detecting whether the current phase difference between the power grid and the electric automobile meets a preset condition; when the current frequency and the current amplitude of the power grid and the current amplitude of the electric automobile are consistent and the current phase difference between the power grid and the electric automobile meets a preset condition, controlling the electric automobile to continue discharging; and if the detected parameter does not accord with the discharging condition, controlling the electric automobile to be disconnected with the power grid.
Therefore, after the electric vehicle enters the discharging state, whether any one of the current electric energy parameters of the power grid and the electric vehicle is not in accordance with the discharging condition is detected in real time, and when each parameter is in accordance with the discharging condition, the electric vehicle is controlled to continue to discharge; if the fact that one parameter does not accord with the discharging condition is detected, disconnection between the electric automobile and the power grid is controlled, and therefore current electric energy parameters of the electric automobile and the power grid are detected after the electric automobile enters the discharging state, the fact that each parameter in the current electric energy parameters of the electric automobile and the power grid accords with the discharging condition is guaranteed to the electric automobile in the whole discharging process, the probability that high-risk conditions such as current or overlarge voltage occur due to the fact that the certain parameter is inconsistent in the electric energy parameters of the power grid and the electric automobile in the whole discharging process can be effectively reduced, the fact that the electric energy can be fed back to the power grid safely and reliably is guaranteed, and discharging risks in the discharging process are reduced.
Based on the same inventive concept, referring to fig. 3, an embodiment of the present invention provides a charge and discharge pile, including:
the parameter receiving unit 301 is configured to receive an electric energy parameter and a discharge instruction sent by an electric vehicle, where the electric energy parameter includes a frequency, an amplitude, and a phase;
a first parameter determining unit 302, configured to detect an electric energy parameter of a power grid, and determine whether a frequency and an amplitude of the power grid are consistent with a frequency and an amplitude of the electric vehicle;
the second parameter judgment unit 303 is configured to judge whether the phase difference between the power grid and the electric vehicle meets a preset condition if the phase difference is consistent with the preset condition;
the discharge unit 304 is used for switching on a discharge channel and entering a discharge state if the discharge state is met;
if not, the adjusting unit 305 is configured to send a phase adjustment instruction to the electric vehicle, so that the electric vehicle adjusts the electric energy signal of the electric vehicle based on the phase adjustment instruction until the phase difference meets the preset condition.
In an alternative embodiment, the adjusting unit 305 is configured to convert the phase difference into a duty cycle signal, and send the duty cycle signal to the electric vehicle through a charging gun CP contact point, so that the electric vehicle adjusts the phase value of the power parameter based on the duty cycle signal.
In an alternative embodiment, the second parameter determining unit 303 is configured to determine whether a phase difference between the grid and the electric vehicle is less than 1%.
In an optional embodiment, the charge-discharge pile further comprises:
and the discharge forbidding unit is used for forbidding to switch on the discharge channel and displaying forbidding information and forbidding reason information of forbidding to switch on the discharge channel if the frequency and amplitude of the power grid are judged to be inconsistent with any parameters of the frequency and amplitude of the electric vehicle, wherein the forbidding reason information comprises frequency inconsistency and amplitude inconsistency.
In an optional embodiment, the charge-discharge pile further comprises:
the real-time detection unit is used for detecting whether any one of the current electric energy parameters of the power grid and the electric automobile does not accord with a discharge condition in real time after the electric automobile enters a discharge state;
and the discharging disconnection unit is used for controlling the electric automobile to be disconnected with the power grid if one parameter does not accord with the discharging condition.
Through one or more embodiments of the present invention, the present invention has the following advantageous effects or advantages:
the invention discloses a charge and discharge control method and a charge and discharge pile, which are used for receiving electric energy parameters and discharge instructions sent by an electric automobile, wherein the electric energy parameters comprise frequency, amplitude and phase; when the frequency and the amplitude of the power grid are detected to be consistent with those of the electric automobile and the phase difference between the power grid and the electric automobile meets a preset condition, switching on a discharge channel and entering a discharge state; if the phase difference between the power grid and the electric automobile does not meet the preset condition, sending a phase adjustment instruction to the electric automobile so that the electric automobile adjusts the electric energy signal of the electric automobile until the phase difference meets the preset condition; therefore, when each parameter in the electric energy parameters of the power grid is matched with the corresponding parameter of the electric automobile, the discharging channel is switched on, and the electric automobile enters a discharging state. The high risk situation is avoided by carrying out triple discharge detection before discharge, so that the electric energy can be fed back to the power grid more safely and reliably, and the discharge risk in the discharge process is reduced.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (10)
1. A charging and discharging control method is applied to a charging pile main controller and comprises the following steps:
receiving electric energy parameters and a discharge instruction sent by an electric automobile, wherein the electric energy parameters comprise frequency, amplitude and phase;
detecting electric energy parameters of a power grid, and judging whether the frequency and the amplitude of the power grid are consistent with those of the electric automobile or not;
if the phase difference between the power grid and the electric vehicle meets the preset condition, judging whether the phase difference between the power grid and the electric vehicle meets the preset condition;
if yes, switching on a discharge channel and entering a discharge state;
if the phase difference meets the preset condition, sending a phase adjustment instruction to the electric automobile so that the electric automobile adjusts the phase based on the phase adjustment instruction until the phase difference meets the preset condition;
the main controller is connected with the three-phase incoming line switch and used for detecting the electric energy parameters of the power grid.
2. The method of claim 1, wherein the sending a phase adjustment command to an electric vehicle comprises:
converting the phase difference into a duty ratio signal, and sending the duty ratio signal to the electric automobile through a charging gun CP contact point, so that the electric automobile performs phase adjustment based on the duty ratio signal.
3. The method of claim 2, wherein the determining whether the phase difference between the grid and the electric vehicle satisfies a preset condition comprises:
and judging whether the phase difference between the power grid and the electric automobile is less than 1%.
4. The method of claim 1, wherein if it is determined that there is any one of the parameters of the frequency and the amplitude of the grid and the frequency and the amplitude of the electric vehicle, the method further comprises:
forbidding to switch on the discharge channel, and displaying forbidding information and forbidding reason information of forbidding to switch on the discharge channel, wherein the forbidding reason information comprises frequency inconsistency and/or amplitude inconsistency.
5. The method of claim 1, wherein after entering the discharge state, the method further comprises:
detecting whether any one of the electric energy parameters of the power grid and the electric vehicle does not accord with a discharging condition in real time;
and if one parameter does not meet the discharge condition, controlling the electric automobile to be disconnected with the power grid.
6. A charge-discharge pile, comprising:
the parameter receiving unit is used for receiving electric energy parameters and a discharging instruction sent by the electric automobile, wherein the electric energy parameters comprise frequency, amplitude and phase;
the first parameter judgment unit is used for detecting electric energy parameters of a power grid and judging whether the frequency and the amplitude of the power grid are consistent with those of the electric automobile or not;
the second parameter judgment unit is used for judging whether the phase difference between the power grid and the electric vehicle meets a preset condition or not if the phase difference is consistent with the preset condition;
the discharge unit is used for switching on a discharge channel and entering a discharge state if the discharge unit is satisfied;
and the adjusting unit is used for sending a phase adjusting instruction to the electric automobile if the phase difference does not meet the preset condition, so that the electric automobile adjusts the electric energy signal of the electric automobile based on the phase adjusting instruction until the phase difference meets the preset condition.
7. The charging and discharging pile according to claim 6, wherein the adjusting unit is configured to convert the phase difference into a duty cycle signal, and send the duty cycle signal to the electric vehicle through a charging gun CP contact point, so that the electric vehicle adjusts a phase value of an electric energy parameter based on the duty cycle signal.
8. The charge-discharge pile according to claim 7, wherein the second parameter determination unit is configured to determine whether a phase difference between the grid and the electric vehicle is less than 1%.
9. The charge-discharge pile according to claim 6, further comprising:
and the discharge forbidding unit is used for forbidding to switch on the discharge channel and displaying forbidding information and forbidding reason information of forbidding to switch on the discharge channel if the frequency and amplitude of the power grid are judged to be inconsistent with any parameters of the frequency and amplitude of the electric vehicle, wherein the forbidding reason information comprises frequency inconsistency and amplitude inconsistency.
10. The charge-discharge pile according to claim 6, further comprising:
the real-time detection unit is used for detecting whether any one of the current electric energy parameters of the power grid and the electric automobile does not accord with a discharge condition in real time after the electric automobile enters a discharge state;
and the discharging disconnection unit is used for controlling the electric automobile to be disconnected with the power grid if one parameter does not accord with the discharging condition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011507288.3A CN112572226A (en) | 2020-12-18 | 2020-12-18 | Charging and discharging control method and charging and discharging pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011507288.3A CN112572226A (en) | 2020-12-18 | 2020-12-18 | Charging and discharging control method and charging and discharging pile |
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| CN107196318A (en) * | 2017-04-17 | 2017-09-22 | 华北电力大学 | A kind of electric automobile based on V2G technologies participates in power grid frequency modulation control method |
| CN110871703A (en) * | 2018-08-29 | 2020-03-10 | 法雷奥动力总成(上海)有限公司 | Alternating current charging interface of electric vehicle and charging and discharging method thereof |
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