CN114336952B - Load feedback-based diesel-stored mobile power supply vehicle power control method and system - Google Patents
Load feedback-based diesel-stored mobile power supply vehicle power control method and system Download PDFInfo
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Abstract
The disclosure belongs to the technical field of micro-grids, and provides a diesel-storage mobile power supply vehicle power control method and system based on load feedback, wherein the method comprises the following steps: acquiring a battery charge state of an energy storage system; judging the size between the obtained battery state of charge and a battery state of charge set value, and realizing the power control of the diesel storage mobile power supply vehicle; when the state of charge of the battery is larger than a set value of the state of charge of the battery, starting an energy storage system, and when the state of charge of the battery is smaller than a first threshold value of the state of charge of the battery, starting a diesel generator, and realizing conversion of a control mode of the energy storage system based on an intermediate control link with power maintenance; and when the battery state of charge is smaller than a battery state of charge set value, starting the diesel generator, and when the battery state of charge is larger than a battery state of charge second threshold value, stopping the diesel generator, completing the charging of the energy storage system, and realizing the conversion of the control mode of the energy storage system based on an intermediate control link of the current feedback.
Description
Technical Field
The disclosure belongs to the technical field of micro-grids, and particularly relates to a diesel-storage mobile power supply vehicle power control method and system based on load feedback.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The development of national economy and the improvement of the living standard of people are one problem which needs to be solved at present, wherein the requirements on the reliability of power supply are higher and higher, the medium-low voltage distribution network is maintained without power failure, the important load is ensured to supply power, and the power supply quality of heavy overload areas is guaranteed. The mobile emergency power supply vehicle can be well applied to the scene, the traditional mobile power supply vehicle is basically a diesel generator, the operation characteristics of the diesel generator are limited, the diesel generator can not meet the requirement of the electric energy quality when the load rapidly fluctuates in the independent power supply of important loads, the diesel generator works in a low-load state for a long time, the abrasion of parts is easy to cause, and the service life is reduced.
In recent years, with the progress of energy storage technology, some mobile energy storage vehicles are appeared, and an energy storage system can quickly track load changes, but has very limited electric quantity, so that the requirement of long-time large-load power supply cannot be met. The related researches on the light diesel storage mobile power supply vehicle are less, and the related documents develop the researches on the capacity configuration of the light diesel storage complementary power supply vehicle; the research on energy management strategies is carried out from the economical point of view, so that the running time of the diesel generator is reduced as much as possible; there are documents which propose a coordinated control method of a diesel generator and an energy storage battery in a diesel-storage isolated micro-grid system, but the method prevents system breakdown caused by long-term overcurrent of the diesel engine by introducing an auxiliary power control signal into the traditional droop control of the energy storage system, but the control of the energy storage power is not mentioned when the diesel generator is normally operated.
Disclosure of Invention
In order to solve the problems, the disclosure provides a power control method and a power control system for a diesel-electric vehicle based on load feedback, which are based on a source network load micro-grid theory, according to the structure form of an emergency electric vehicle combining a diesel generator and an energy storage system, practical application scenes are met, a control strategy is researched, seamless automatic switching of various operation modes of the diesel generator and the energy storage system of the emergency electric vehicle is realized, and important load uninterrupted power supply is ensured.
According to some embodiments, a first scheme of the present disclosure provides a power control method for a diesel-electric vehicle based on load feedback, which adopts the following technical scheme:
The utility model provides a firewood stores up portable power source car power control method based on load feedback, firewood stores up portable power source car and includes diesel generator and energy storage system, the method includes following steps:
Acquiring a battery charge state of an energy storage system;
judging the size between the obtained battery state of charge and a battery state of charge set value, and realizing the power control of the diesel storage mobile power supply vehicle;
When the obtained battery state of charge is larger than a battery state of charge set value, starting an energy storage system, and when the obtained battery state of charge is smaller than a battery state of charge first threshold value, starting a diesel generator, and realizing conversion of a control mode of the energy storage system based on an intermediate control link with power maintenance;
When the obtained battery state of charge is smaller than a battery state of charge set value, starting the diesel generator, and when the obtained battery state of charge is larger than a battery state of charge second threshold value, stopping the diesel generator, completing the charging of the energy storage system, and realizing the conversion of the control mode of the energy storage system based on an intermediate control link of the current feedback.
As a further technical limitation, in grid-connected mode, the diesel generator is controlled by PQ; in off-grid mode, the diesel generator is controlled by VF.
As a further technical definition, the energy storage system is in a voltage control mode when the diesel generator is not operating; the energy storage system is in a current control mode when the diesel generator is running.
As a further technical limitation, the diesel-stored mobile power supply vehicle tracks fluctuation change of load in real time, and the running state of the diesel-stored mobile power supply vehicle comprises that an energy storage system independently supplies power to the load, the energy storage system and a diesel generator simultaneously supply power to the load, the diesel generator charges the energy storage system, and the diesel generator simultaneously supplies power to the load and charges the energy storage system.
As a further technical definition, when the obtained battery state of charge is greater than the battery state of charge set point, after starting the energy storage system, the energy storage system is shut down when there is no load for a preset time.
As a further technical definition, when the obtained battery state of charge is less than the battery state of charge set point, after starting the diesel generator, both the energy storage system and the diesel generator are shut down when there is no load for a preset time.
As a further technical limitation, when the obtained battery state of charge is less than the battery state of charge set point, after starting the diesel generator, the energy storage system and the diesel generator are both shut down when the diesel generator oil is less than the preset oil.
According to some embodiments, a second scheme of the present disclosure provides a power control system of a diesel-electric vehicle based on load feedback, which adopts the following technical scheme:
a firewood stores up portable power source car power control system based on load feedback, firewood stores up portable power source car and includes diesel generator and energy storage system, includes:
an acquisition module configured to acquire a battery state of charge of the energy storage system;
the power control module is configured to judge the acquired battery state of charge and a battery state of charge set value, so as to realize the power control of the diesel-electric mobile power vehicle;
When the obtained battery state of charge is larger than a battery state of charge set value, starting an energy storage system, and when the obtained battery state of charge is smaller than a battery state of charge first threshold value, starting a diesel generator, and realizing conversion of a control mode of the energy storage system based on an intermediate control link with power maintenance;
When the obtained battery state of charge is smaller than a battery state of charge set value, starting the diesel generator, and when the obtained battery state of charge is larger than a battery state of charge second threshold value, stopping the diesel generator, completing the charging of the energy storage system, and realizing the conversion of the control mode of the energy storage system based on an intermediate control link of the current feedback.
According to some embodiments, a third aspect of the present disclosure provides a computer-readable storage medium, which adopts the following technical solutions:
a computer readable storage medium having stored thereon a program which when executed by a processor performs the steps in a method of load feedback based power control of a diesel-electric vehicle according to the first aspect of the present disclosure.
According to some embodiments, a fourth aspect of the present disclosure provides an electronic device, which adopts the following technical solutions:
an electronic device comprising a memory, a processor and a program stored on the memory and executable on the processor, the processor implementing the steps in the load feedback based diesel-electric vehicle power control method according to the first aspect of the present disclosure when the program is executed.
Compared with the prior art, the beneficial effects of the present disclosure are:
According to the power control method and the power control device, the power control of the diesel-electric mobile power supply vehicle is carried out through load feedback, seamless automatic switching on the operation modes of the diesel generator and the energy storage system is realized under the action of the intermediate control link based on power maintenance and the intermediate control link based on current feedback, and uninterrupted power supply of important loads is realized.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate and explain the exemplary embodiments of the disclosure and together with the description serve to explain the disclosure, and do not constitute an undue limitation on the disclosure.
FIG. 1 is a flow chart of a method for controlling power of a diesel-electric vehicle based on load feedback in a first embodiment of the present disclosure;
FIG. 2 is a topology wiring diagram of a diesel-electric mobile power car in a first embodiment of the present disclosure;
FIG. 3 is a control block diagram of a diesel generator VF mode in accordance with one embodiment of the present disclosure;
FIG. 4 is a control block diagram of a diesel generator droop control in accordance with an embodiment of the present disclosure;
FIG. 5 is a voltage control block diagram of an energy storage system in dq coordinates in accordance with an embodiment of the present disclosure;
FIG. 6 is a current control block diagram of an energy storage system in dq coordinates in accordance with an embodiment of the present disclosure;
fig. 7 is a network topology diagram of a diesel-electric vehicle in accordance with a first embodiment of the present disclosure;
Fig. 8 is a control block diagram of power feedback in a first embodiment of the present disclosure;
FIG. 9 is a control block diagram of current feedback in a first embodiment of the present disclosure;
FIG. 10 is a control block diagram of power conservation in a first embodiment of the present disclosure;
FIG. 11 is a flowchart of a method of controlling power of a diesel-electric vehicle based on load feedback in accordance with an embodiment of the present disclosure;
Fig. 12 is a block diagram of a power control system of a diesel-electric vehicle based on load feedback in a second embodiment of the present disclosure.
Detailed Description
The disclosure is further described below with reference to the drawings and examples.
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments in accordance with the present disclosure. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
Embodiments of the present disclosure and features of embodiments may be combined with each other without conflict.
Example 1
The embodiment of the disclosure first introduces a power control method of a diesel-electric mobile power supply vehicle based on load feedback.
The power control method of the diesel-electric mobile power vehicle based on load feedback shown in fig. 1 comprises the following steps:
Acquiring a battery charge state of an energy storage system;
judging the size between the obtained battery state of charge and a battery state of charge set value, and realizing the power control of the diesel storage mobile power supply vehicle;
When the obtained battery state of charge is larger than a battery state of charge set value, starting an energy storage system, and when the obtained battery state of charge is smaller than a battery state of charge first threshold value, starting a diesel generator, and realizing conversion of a control mode of the energy storage system based on an intermediate control link with power maintenance;
When the obtained battery state of charge is smaller than a battery state of charge set value, starting the diesel generator, and when the obtained battery state of charge is larger than a battery state of charge second threshold value, stopping the diesel generator, completing the charging of the energy storage system, and realizing the conversion of the control mode of the energy storage system based on an intermediate control link of the current feedback.
The movable energy storage vehicle is mainly applied to uninterrupted maintenance of a medium-low voltage distribution network and independent power supply of important loads, and is an alternating current load, so that a diesel generator, an energy storage system and the loads adopt an alternating current micro-grid connection mode, the topological structure of the movable energy storage vehicle is shown in fig. 2, the diesel generator and the alternating current load are directly connected into a bus, the energy storage system is connected into the alternating current bus through a bidirectional converter, a power grid interface is reserved for the movable energy storage vehicle for facilitating charging of the energy storage system when the movable power supply vehicle is applied to independent power supply of the important loads, a locking design is adopted between the movable energy storage vehicle and the diesel generator, and the diesel generator and a power grid are not connected into the system at the same time.
Diesel generators generally consist of a diesel engine, an excitation regulator and a control unit. Generally, the diesel generator is controlled by PQ in the grid-connected mode, and the diesel generator is controlled by VF in the off-grid mode.
In the off-grid mode, the diesel generator is used as a main power supply, the stability of the system voltage and frequency is maintained by changing the oil inlet amount, and a control block diagram is shown in figure 3.
In the grid-connected mode, the system voltage and frequency are provided by a power grid, the diesel generator adopts a PQ control mode, but different from the situation of connecting a large power grid, in the independent micro-grid system, when other power supplies serve as main power supplies, in order to ensure the stability of the system, the diesel generator generally adopts droop control to participate in the regulation of partial voltage and frequency, and a control block diagram is shown in figure 4.
The energy storage system is another main power supply in the mobile power supply vehicle, the factors such as equipment energy density and service life are considered, the mobile power supply vehicle generally adopts a lithium iron phosphate battery, in a micro-grid system formed by the mobile power supply vehicle, the energy storage system mainly has two operation modes, and when the diesel generator does not operate, the energy storage system serves as a main power supply of the system and is used for maintaining the voltage and the frequency of the system to be stable, a voltage source control mode is generally adopted, and a voltage control structure based on dq coordinates is shown in fig. 5.
When the diesel generator is operated, the energy storage system works in a current control mode, active power and reactive power are provided according to the requirements of the control system, and a current control structure based on dq coordinates is shown in fig. 6.
The hybrid mobile energy supply system composed of the diesel generator and the energy storage system needs to track the fluctuation change of the load in real time, and the operation conditions are as follows: the energy storage system supplies power independently, the energy storage system and the diesel generator supply power simultaneously, the diesel generator charges energy storage, and the diesel generator supplies power to the load and charges the energy storage simultaneously. In the actual operation process, the operation states of the diesel generator and the energy storage are required to be adjusted at any time according to the actual load condition, and the connection topological diagram is shown in fig. 7.
In order to prevent the diesel generator from frequently switching between a low-load state and a system working state during long-term working, the reliable and economical running mode of the mobile power supply vehicle is that the diesel generator bears a stable load part and the energy storage system bears a fluctuation load.
In this embodiment, a State Of Charge (SOC) Of a battery Of the energy storage system is used as a condition for determining output power Of the diesel generator and mode conversion, and when the SOC is higher than a certain value, the output power Of the diesel generator is controlled to be reduced; and the SOC value is lower than a certain value, and the output power of the diesel generator is controlled to be increased.
When the diesel generator and the energy storage system run simultaneously, the diesel generator is used as a main power supply and works in a PV mode to provide stable voltage and frequency for the system, and the energy storage system works in a current control mode. The energy storage system receives the instruction of the control system to send or absorb the active power and the reactive power. Considering that the load response time of the diesel generator is longer, in order to ensure safe and stable operation of the system, the embodiment proposes to determine the instantaneous power of the energy storage system by adopting a load power feedback control mode according to the current SOC value of the energy storage system, and a feedback control block diagram is shown in fig. 8.
Under the control mode, the energy storage system can effectively track load fluctuation by reasonably selecting the control parameters of the PI controller, and can control the diesel generator to charge or discharge less energy to the energy storage when the SOC value of the energy storage system is low; when the SOC value of the energy storage system is higher, controlling the energy storage system to discharge more, and reducing the power of the diesel generator; meanwhile, the diesel generator is ensured to work in a certain stable state for a long time, the diesel generator is prevented from working under a low load or overcurrent for a long time, and the power distribution of the diesel generator and the energy storage system is as shown in the following table 1:
TABLE 1 Power Allocation Table for Diesel Generator and energy storage System
In table 1, PG is the diesel generator rated power; PL is actual load power; the stored energy power set value is compared with the current BMS requiring charge and discharge current, and takes a smaller value.
When the energy storage system operates independently, the energy storage system is used as a main power supply to provide stable voltage and frequency for the system, and the energy storage system adopts the voltage control shown in fig. 5. In this mode of operation, the stored energy can rapidly influence load changes and fluctuations, but because of the limited capacity of the energy storage system, it is typically used for short-term power.
Seamless handover control logic
(1) Conversion of energy storage system from current control to voltage control
When the diesel generator is used as a main power supply and the battery SOC value is too high or the diesel generator is withdrawn to run due to insufficient fuel and other factors, the energy storage converter is required to be converted into a voltage control mode by a current control mode, so that the stability of power supply is ensured, the stable and reliable voltage of an alternating current bus is ensured in the state switching process of the energy storage system, and uninterrupted power supply of a load is maintained.
After the control system obtains that the criterion of the diesel generator exiting the system is met, a shutdown command is required to be sent to the diesel generator, meanwhile, a disconnection command is sent to the grid-connected switch, and the command is sent to the energy storage system to be switched from a current control mode to a voltage control mode. Because the conversion time of the energy storage converter is faster than the action of the grid-connected switch, after the energy storage system is converted into a voltage control mode, the energy storage system is still connected with the diesel generator, a voltage and frequency difference exists between a diesel generator port and an energy storage system converter port, and meanwhile, the phenomenon of overcurrent of the converter is easy to occur due to small impedance of an outlet of the converter. In order to maintain the phenomenon that current suddenly changes in the state switching process of the current transformer, in this embodiment, an intermediate control state with current feedback is added in the process of switching the current transformer from the current control mode to the voltage switching mode, the output power of the energy storage system is unchanged for a period of time after the state switching of the current transformer is controlled, and a control block diagram is shown in fig. 9, wherein Idt0 and Iqt are output current values of the current transformer before the mode switching, after the current transformer receives an instruction of switching the control system from the current control to the voltage control, the current transformer is firstly switched to the intermediate control state, and is switched to the voltage control mode after a set time is reached.
(2) Conversion of energy storage system from voltage control to current control
When the energy storage system is used as a main power supply and the SOC value of the battery is too low, the diesel generator needs to be started to be integrated into the system for operation, and the energy storage converter needs to be converted from a voltage control mode to a current control mode; because the response time of the diesel generator is slow, if the load in the system is completely transferred to the diesel generator, the rotation speed of the diesel generator is easy to be reduced and the system is unstable, so that the load is gradually transferred to the diesel generator in the process of converting the current control of the energy storage system into the voltage control, and the instantaneous power of the energy storage system is reasonably determined according to a load feedback control strategy. Similar to the conversion of current control into voltage control, in the process of converting voltage control into current control, the embodiment adds an intermediate control link with power retention, the control block diagram of which is shown in fig. 10, after the energy storage converter receives the instruction of converting the control system from voltage control into current control, it switches to the intermediate control state first, and gradually reduces the power value of the energy storage system according to the preset power curve until reaching the target value, and then switches to the current control mode.
Based on the above control logic, when the diesel-storage mobile power supply vehicle is used for independent power supply of an important load, in order to realize intelligent and automatic work of the mobile power supply vehicle, the embodiment provides the working principle of the automatic control system of the diesel-storage mobile power supply vehicle, and the working flow of the automatic control system is shown in fig. 11:
the power control method of the diesel-electric vehicle based on load feedback comprises the following specific processes:
step S01: the energy supply requirement exists, and the system is powered on;
step S02: the control system starts to work, judges the SOC value of the energy storage system, if the SOC value is larger than the set value SOC_N1 of the battery state of charge, starts the PCS of the energy storage system (Power Conversion System, PCS for short), the energy storage system starts to work, and the operation shifts to the working state 1 in the step S04 (the control system needs to issue a starting command to the PCS here);
step S03: if not greater than SOC_N1, starting the diesel generator, working in a VF mode, starting the PCS, connecting the energy storage system with the grid, working in a PQ mode, and turning to a working state 2 in the step S05 (the control system needs to send a starting command to the diesel generator, send a closing command to the diesel generator grid-connected breaker and send the starting command to the PCS);
Step S04: working state 1: the energy storage system works in a VF mode to supply power to a load, and the load comprises an air conditioner, illumination and the like in a power supply vehicle;
Under the working state, if the SOC value is smaller than a first threshold value SOC-N5 of the battery state of charge, starting the diesel generator, completing switching of an energy storage working mode from VF to PQ, and then, switching the system operation to the working state 2 in the step S05;
in the working state, if the preset TIME TIME1 is exceeded and no load exists, stopping the diesel generator and stopping the PCS, and the operation is switched to a stop state in the step S06 (the control system needs to issue a stop command to the diesel generator, issue a brake-separating command to the diesel generator grid-connected breaker and issue a stop command to the PCS);
Step S05: working state 2: the diesel generator works in a VF mode, the energy storage system works in a PQ mode to supply power to the load, and at the moment, the energy storage power is different according to the SOC value.
In the working state, if the preset TIME TIME1 is exceeded and no load exists, stopping the diesel generator and stopping the PCS, and the operation is switched to a stop state in the step S06 (the control system needs to issue a stop command to the diesel generator, issue a brake-separating command to the diesel generator grid-connected breaker and issue a stop command to the PCS);
In this operating state, if the diesel generator oil amount is smaller than the preset oil amount M1, the diesel generator is stopped, the PCS is stopped, the operation shifts to the stop state in step S06 (where the control system needs to issue a stop command to the diesel generator, issue a brake-off command to the diesel generator grid-connected breaker, issue a stop command to the PCS),
Under the working state, if the charging of the energy storage system is completed, and the SOC value is greater than a second threshold value SOC-N0 of the battery state of charge or the single highest voltage Vcell_max reaches a highest voltage Limit Vcell_H_Limit, stopping the diesel generator, converting the energy storage system from a PQ mode to a VF mode, and operating to a working state 1 in the step 04 (the control system needs to issue a shutdown command to the diesel generator, issue a brake-separating command to a grid-connected breaker of the diesel generator, and issue a command to the PCS to complete the conversion of the energy storage working mode from the PQ to the VF mode);
Step S06: and (3) stopping the machine: the diesel generator is stopped, the PCS is stopped, the diesel storage mobile power supply vehicle is stopped, and the 400V bus is powered off.
According to the embodiment, on the basis of a source network load storage micro-grid theory, according to the structure form of the emergency power supply vehicle combining the diesel generator and the energy storage system, practical application scenes are met, a control strategy is researched, seamless automatic switching of various operation modes of the diesel generator of the emergency power supply vehicle and the energy storage system is realized, and uninterrupted power supply of important loads is ensured.
Example two
The second embodiment of the disclosure introduces a power control system of a diesel-electric vehicle based on load feedback.
The utility model provides a firewood stores up portable power source car power control system based on load feedback as shown in fig. 12, firewood stores up portable power source car and includes diesel generator and energy storage system, includes:
an acquisition module configured to acquire a battery state of charge of the energy storage system;
the power control module is configured to judge the acquired battery state of charge and a battery state of charge set value, so as to realize the power control of the diesel-electric mobile power vehicle;
When the obtained battery state of charge is larger than a battery state of charge set value, starting an energy storage system, and when the obtained battery state of charge is smaller than a battery state of charge first threshold value, starting a diesel generator, and realizing conversion of a control mode of the energy storage system based on an intermediate control link with power maintenance;
When the obtained battery state of charge is smaller than a battery state of charge set value, starting the diesel generator, and when the obtained battery state of charge is larger than a battery state of charge second threshold value, stopping the diesel generator, completing the charging of the energy storage system, and realizing the conversion of the control mode of the energy storage system based on an intermediate control link of the current feedback.
The detailed steps are the same as those of the diesel-electric vehicle power control method based on load feedback provided in the first embodiment, and will not be described here again.
Example III
A third embodiment of the present disclosure provides a computer-readable storage medium.
A computer readable storage medium having stored thereon a program which when executed by a processor performs the steps in a method for controlling power of a diesel-electric vehicle based on load feedback according to an embodiment of the present disclosure.
The detailed steps are the same as those of the diesel-electric vehicle power control method based on load feedback provided in the first embodiment, and will not be described here again.
Example IV
The fourth embodiment of the disclosure provides an electronic device.
An electronic device includes a memory, a processor, and a program stored on the memory and executable on the processor, wherein the processor implements the steps in the load feedback-based diesel-electric vehicle power control method according to the first embodiment of the disclosure when executing the program.
The detailed steps are the same as those of the diesel-electric vehicle power control method based on load feedback provided in the first embodiment, and will not be described here again.
The foregoing description of the preferred embodiments of the present disclosure is provided only and not intended to limit the disclosure so that various modifications and changes may be made to the present disclosure by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.
Claims (10)
1. The utility model provides a firewood stores up portable power source car power control method based on load feedback, firewood stores up portable power source car and includes diesel generator and energy storage system, its characterized in that, the method includes following steps:
Acquiring a battery charge state of an energy storage system;
judging the size between the obtained battery state of charge and a battery state of charge set value, and realizing the power control of the diesel storage mobile power supply vehicle;
When the obtained battery state of charge is larger than a battery state of charge set value, starting an energy storage system, and when the obtained battery state of charge is smaller than a battery state of charge first threshold value, starting a diesel generator, and realizing conversion of a control mode of the energy storage system based on an intermediate control link with power maintenance; when the energy storage system is used as a main power supply and the battery SOC value is too low and the diesel generator is required to be started to operate and the system is integrated, the energy storage converter is required to be converted from a voltage control mode to a current control mode, and an intermediate control link with power maintenance is added; after receiving an instruction for converting the control system from voltage control to current control, the energy storage converter is firstly switched to an intermediate control state, gradually reduces the power value of the energy storage system to a target value according to a preset power curve, and is then switched to a current control mode;
when the obtained battery state of charge is smaller than a battery state of charge set value, starting a diesel generator, and when the obtained battery state of charge is larger than a battery state of charge second threshold, stopping the diesel generator, completing the charging of the energy storage system, and realizing the conversion of the control mode of the energy storage system based on an intermediate control link of the current feedback; when the diesel generator is used as a main power supply and the SOC value of the battery is too high or the fuel of the diesel generator is insufficient, the control system sends an instruction to the energy storage system, and the current control mode is switched to the voltage control mode; adding an intermediate control state with current feedback in the process of converting the current converter from a current control mode to a voltage control mode; after receiving the command of switching the control system from current control to voltage control, the converter is firstly switched to an intermediate control state, and is switched to a voltage control mode after reaching a set time.
2. The method for controlling power of a diesel-electric vehicle based on load feedback as claimed in claim 1, wherein in a grid-connected mode, the diesel generator is controlled by PQ; in off-grid mode, the diesel generator is controlled by VF.
3. A method of controlling power of a diesel-electric vehicle based on load feedback as claimed in claim 1, wherein said energy storage system is in a voltage control mode when said diesel generator is not operating; the energy storage system is in a current control mode when the diesel generator is running.
4. The method for controlling power of a diesel-electric mobile power vehicle based on load feedback as set forth in claim 1, wherein the diesel-electric mobile power vehicle tracks fluctuation of load in real time, and the operation state includes that the energy storage system supplies power to the load separately, the energy storage system and the diesel generator supply power to the load simultaneously, the diesel generator charges the energy storage system, and the diesel generator supplies power to the load and charges the energy storage system simultaneously.
5. The method for controlling power of a diesel-electric mobile power vehicle based on load feedback as set forth in claim 1, wherein the energy storage system is stopped when no load is applied for a predetermined time after the energy storage system is started when the obtained state of charge of the battery is greater than the set value of the state of charge of the battery.
6. The method for controlling power of a diesel-electric vehicle based on load feedback as set forth in claim 1, wherein the energy storage system and the diesel generator are both shut down when there is no load in a predetermined time after the diesel generator is started when the obtained battery state of charge is less than the battery state of charge set value.
7. The method for controlling power of a diesel-electric vehicle based on load feedback as set forth in claim 1, wherein the energy storage system and the diesel generator are both shut down when the amount of fuel in the diesel generator is less than a preset amount of fuel after the diesel generator is started when the obtained battery state of charge is less than the battery state of charge set point.
8. The power control system of the diesel-electric vehicle based on load feedback adopts the power control method of the diesel-electric vehicle based on load feedback as claimed in claim 1, wherein the diesel-electric vehicle comprises a diesel generator and an energy storage system, and is characterized by comprising:
an acquisition module configured to acquire a battery state of charge of the energy storage system;
the power control module is configured to judge the acquired battery state of charge and a battery state of charge set value, so as to realize the power control of the diesel-electric mobile power vehicle;
When the obtained battery state of charge is larger than a battery state of charge set value, starting an energy storage system, and when the obtained battery state of charge is smaller than a battery state of charge first threshold value, starting a diesel generator, and realizing conversion of a control mode of the energy storage system based on an intermediate control link with power maintenance;
When the obtained battery state of charge is smaller than a battery state of charge set value, starting the diesel generator, and when the obtained battery state of charge is larger than a battery state of charge second threshold value, stopping the diesel generator, completing the charging of the energy storage system, and realizing the conversion of the control mode of the energy storage system based on an intermediate control link of the current feedback.
9. A computer readable storage medium having stored thereon a program, which when executed by a processor, implements the steps of the load feedback based diesel mobile electric vehicle power control method according to any of claims 1-7.
10. An electronic device comprising a memory, a processor and a program stored on the memory and executable on the processor, wherein the processor, when executing the program, performs the steps in the load feedback based diesel-electric vehicle power control method of any one of claims 1-7.
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| CN106877380A (en) * | 2015-12-14 | 2017-06-20 | 魏莹 | A kind of battery energy storage and coordinated controller of excitation and valve method |
| CN112810466A (en) * | 2020-12-31 | 2021-05-18 | 深圳供电局有限公司 | Multifunctional mobile electric energy storage emergency vehicle based on wind, light and diesel energy storage and charging |
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| US7353084B2 (en) * | 2003-02-27 | 2008-04-01 | Acutra, Inc. | Generator controller |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106877380A (en) * | 2015-12-14 | 2017-06-20 | 魏莹 | A kind of battery energy storage and coordinated controller of excitation and valve method |
| CN112810466A (en) * | 2020-12-31 | 2021-05-18 | 深圳供电局有限公司 | Multifunctional mobile electric energy storage emergency vehicle based on wind, light and diesel energy storage and charging |
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