CN109638843B - Unified coordination control method for charging piles of energy routers - Google Patents
Unified coordination control method for charging piles of energy routers Download PDFInfo
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- CN109638843B CN109638843B CN201910053512.7A CN201910053512A CN109638843B CN 109638843 B CN109638843 B CN 109638843B CN 201910053512 A CN201910053512 A CN 201910053512A CN 109638843 B CN109638843 B CN 109638843B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
Abstract
The invention discloses a unified coordination control method for an energy router charging pile, wherein an energy storage double-active bridge converter and a charging pile double-active bridge converter adopt a control method combining sag-based distributed control and current tracking-based centralized control. The droop control is internally provided with a current control link, so that the converter can transmit any power within a capacity allowable range through accurate current tracking, and the power transmitted between the converter to be switched and the direct-current bus is reduced to zero before switching or cutting when working conditions are switched, so that impact is avoided, and the purpose of soft switching is achieved. In addition, the control strategy that this patent provided has given full play to the advantage of droop control secondary voltage compensation, when realizing accurate current control again, can realize the stability of direct current bus voltage simultaneously to voltage that has avoided the circumstances such as system start-up or pulse disturbance excessively supplyes the unstable phenomenon of system that causes through adding inertial delay link in secondary voltage compensation.
Description
Technical Field
The invention relates to a unified coordination control method for charging piles of an energy router, and belongs to the field of micro-grid control.
Background
Along with electric automobile's rapid development, the demand to electric automobile fills electric pile is bigger and bigger. Traditional electric automobile fills electric pile and directly hangs and lean on big electric wire netting operation, and single-phase transmission of power, can only follow big electric wire netting flow direction electric automobile battery. Therefore, when more and more electric automobiles are charged disorderly, a great load is necessarily caused on the power grid, and the voltage and the frequency of the power grid can be kept stable only by increasing a great spare capacity on the power generation side. But from another perspective, the electric automobile is also a very large energy storage, and if the electric automobile can be scheduled to be charged and discharged in order, the electric automobile can well support a large power grid. Therefore, in the existing research V2G technology, the electric automobile is scheduled to be charged and discharged orderly by utilizing the bidirectional flow of the charging pile and the energy of the large power grid. However, the bidirectional charging pile is only used to be hung on a large power grid to operate, so that the experience degree of a user is poor, and the contradiction that the user needs to charge and the large power grid needs to schedule the charging pile to discharge may occur. In addition, the comprehensive benefit of the distributed power generation of the renewable energy is increasingly shown, and the problem of how to improve the permeability of the renewable energy on the premise of ensuring the reliability is also greatly concerned.
The photovoltaic, the energy storage and the bidirectional electric vehicle charging pile are integrated together by utilizing the energy router to form a direct-current micro-grid, and then the connection with a large power grid through the bidirectional AC-DC is a good choice, so that the self-absorption of distributed power generation is facilitated, and the influence of the distributed power generation output intermittence and the randomness of electric vehicle access on the stability and the reliability of the system is effectively reduced. Based on the topological structure, a unified coordination control strategy is needed to be researched to effectively control the soft switching of various working conditions, so that the voltage stability and the power balance in the direct-current micro-grid system under various working conditions are achieved.
Disclosure of Invention
The purpose of the invention is as follows: the invention provides a unified coordination control method for charging piles of an energy router, which is used for maintaining voltage stability and power balance in a direct-current microgrid under various working conditions.
The technical scheme is as follows: the technical scheme adopted by the invention is a unified coordination control method for charging piles of an energy router, which comprises an energy storage double-active-bridge converter, a charging pile double-active-bridge converter and a boost converter which are connected with a direct-current bus, wherein the direct-current bus is simultaneously connected with a power grid, and the energy storage double-active-bridge converter and the charging pile double-active-bridge converter adopt a control method combining sag-based distributed control and current tracking-based centralized control.
DAB current I is firstly carried out by the energy storage double-active-bridge converter1And a first current reference value I1refAnd (4) subtracting the difference value to obtain a difference value, and filtering out high-frequency ripples through a proportional-integral link PI regulation and low-pass filtering LPS. Then connected with the DC bus voltage UdcMultiplying and low-pass filtering the LPS again to obtain a first power referenceValue P1ref. Then obtaining the reference voltage U of the DAB droop control of the energy storage through the droop control of the voltage and the power1ref. Finally, DAB droop control reference voltage U with energy storage function1refAnd DC bus voltage UdcSubtracting and adding a compensation value deltauAfter the proportional integral link PI adjustment, the current I is output with the energy storage batterybatAnd subtracting, and obtaining a phase shift angle of the energy storage double-active-bridge converter by a difference value obtained by subtracting through a proportional-integral link PI and phase shift control in sequence. The double-active-bridge converter adopts single phase-shifting control, a primary side switch tube of the double-active-bridge converter is controlled by a phase shifting angle of the energy-storage double-active-bridge converter, and a square wave signal which has the same frequency as the primary side phase-shifting frequency and is fixed in phase is added to a secondary side switch tube.
Charging pile double-active-bridge converter DAB current I firstly flows into the charging pile double-active-bridge converter from a direct-current bus2And a second current reference value I2refAnd (4) subtracting the difference value to obtain a difference value, and filtering out high-frequency ripples through a proportional-integral link PI regulation and low-pass filtering LPS. Then connected with the DC bus voltage UdcMultiplying and low-pass filtering the LPS again to obtain a second power reference value P2ref. And then obtaining a DAB droop control reference value U of the electric automobile through voltage power droop control2ref. Finally, DAB droop control reference value U of electric vehicle2refAnd DC bus voltage UdcSubtracting and adding a compensation value deltauAfter the proportional integral link PI adjustment, the current I is output with the battery of the electric automobileevAnd subtracting, and obtaining a difference value obtained by subtracting through a proportional integral link PI and phase shift control in sequence to obtain a phase shift angle of the charging pile double-active-bridge converter. The double-active-bridge converter adopts single phase-shifting control, a primary side switch tube of the double-active-bridge converter is controlled by a phase shifting angle of the energy-storage double-active-bridge converter, and a square wave signal which has the same frequency as the primary side phase-shifting frequency and is fixed in phase is added to a secondary side switch tube.
The three-phase bridge converter adopts dq decoupled voltage and current double closed-loop control.
The boost converter adopts a maximum power point tracking control mode.
The first current reference value I1refAnd a second current parameterExamination value I2refCalculated by a centralized controller of the charging pile of the energy router, and the controller collects the voltage U of the direct current busdcDAB current I of energy storage double-active-bridge converter1DAB current I flowing into charging pile double-active-bridge converter2Photovoltaic output PpvAnd calculating the power required by the energy storage or the electric automobile according to the power balance principle by using the current electric quantity SOC signal of the energy storage, and then dividing the power by the rated voltage of the direct current bus.
Has the advantages that: the energy storage double-active bridge converter and the charging pile double-active bridge converter adopt a control method combining distributed control based on droop and centralized control based on current tracking. The droop control is internally provided with a current control link, so that the converter can transmit any power within a capacity allowable range through accurate current tracking, and the power transmitted between the converter to be switched and the direct-current bus is reduced to zero before switching or cutting when working conditions are switched, so that impact is avoided, and the purpose of soft switching is achieved. In addition, the control strategy that this patent provided has given full play to the advantage of droop control secondary voltage compensation, when realizing accurate current control again, can realize the stability of direct current bus voltage simultaneously to voltage that has avoided the circumstances such as system start-up or pulse disturbance excessively supplyes the unstable phenomenon of system that causes through adding inertial delay link in secondary voltage compensation.
Drawings
FIG. 1 is a topological block diagram of an energy Internet router of the present invention;
FIG. 2 is a control flow diagram of the energy storage dual active bridge converter of the present invention;
FIG. 3 is a control flow diagram of the dual active bridge converter of the charging pile of the present invention;
FIG. 4 is a flow chart of secondary voltage compensation value calculation for droop control;
FIG. 5 is a schematic diagram of a centralized controller according to the present invention;
FIG. 6 is a graph of photovoltaic output versus DC bus voltage;
FIG. 7 is a grid side C phase voltage to current diagram;
FIG. 8 is a graph of energy storage current versus electric vehicle current;
FIG. 9 is a graph of photovoltaic output versus DC bus voltage;
FIG. 10 is a graph of energy storage current versus electric vehicle current;
FIG. 11 is a graph of photovoltaic output versus DC bus voltage;
fig. 12 is a graph of energy storage current versus electric vehicle current.
Detailed Description
The present invention is further illustrated by the following figures and specific examples, which are to be understood as illustrative only and not as limiting the scope of the invention, which is to be given the full breadth of the appended claims and any and all equivalent modifications thereof which may occur to those skilled in the art upon reading the present specification.
As shown in fig. 1, the energy router charging pile of the present embodiment adopts a four-port topology, in which the energy storage and charging piles are connected to a dc bus 1 through a dual active bridge converter (DAB converter). And the photovoltaic is connected to the dc bus 1 through a boost converter (boost converter). The direct current bus 1 is connected to the power grid through a three-phase bridge converter.
The three-phase bridge converter uses a conventional dq decoupled voltage-current double closed loop control. A three-phase bridge converter is a Voltage Source Converter (VSC) and therefore operates on the grid side with a unity power factor.
The photovoltaic outputs direct current voltage, and is connected with the direct current bus 1 through the boost converter. The boost converter adopts a maximum power point tracking control Mode (MPPT), and the maximum power point tracking control is a control method for fully utilizing solar energy and enabling the photovoltaic to always output maximum electric power. The switch tube T in the boost converter is a MOSFET power tube with low internal resistance. The boost converter changes the working point of the photovoltaic power generation system through the on or off of the switching tube T, so that the photovoltaic output voltage VpvAnd tracking the maximum voltage value corresponding to the photovoltaic maximum power output point all the time, thereby realizing the photovoltaic maximum power output.
The stored energy is connected with the DC bus 1 through a double-active-bridge converter, and the control method is to control the lower droopThe system is combined with current control. As shown in FIG. 2, firstly, a DAB current I flowing from a DC bus 1 into an energy storage double active bridge converter is controlled by a current loop1Tracking a given first current reference value I1refTherefore, the control of the exchange power of the energy storage and the direct current bus is realized. In particular, firstly the DAB current I1And a first current reference value I1refAnd (4) subtracting the difference value to obtain a difference value, and filtering out high-frequency ripples through a proportional-integral link PI regulation and low-pass filtering LPS. Then connected with the DC bus voltage UdcMultiplying and low-pass filtering the LPS again to obtain a first power reference value P1ref. Then obtaining the reference voltage U of the DAB droop control of the energy storage through the droop control of the voltage and the power1ref. Finally, DAB droop control reference voltage U with energy storage function1refAnd DC bus voltage UdcSubtracting and adding a compensation value deltauAfter the proportional integral link PI adjustment, the current I is output with the energy storage batterybatAnd subtracting, and obtaining a phase shift angle of the energy storage double-active-bridge converter by a difference value obtained by subtracting through a proportional-integral link PI and phase shift control in sequence. The double-active-bridge converter adopts single phase-shifting control, a primary side switch tube of the double-active-bridge converter is controlled by a phase shifting angle of the energy-storage double-active-bridge converter, and a square wave signal which has the same frequency as the primary side phase-shifting frequency and is fixed in phase is added to a secondary side switch tube. As shown in fig. 2, a compensation value δ is added to the reference voltage for voltage power droop controluThereby to the DC bus voltage UdcSecondary voltage compensation correction is carried out to avoid the direct current bus voltage U caused by the inherent characteristic of droop controldcDeviating from the nominal value as the power changes. FIG. 4 shows the compensation value δuWherein 750V is the rated voltage to be controlled, and the voltage is the voltage U of the DC busdcThe difference obtained after subtraction is subjected to proportional-integral (PI) control and then an inertial delay time constant T is addedsSo as to avoid the disturbance of start and micro pulse, etc. caused by deltauAnd the rapid change of the voltage of the dc bus. At steady state, δuPerforming secondary voltage compensation to maintain the DC bus voltage UdcIs stabilized at the foreheadAnd (5) fixing the value.
The charging pile double-active bridge converter adopts the same control strategy as the energy storage double-active bridge converter, and as shown in figure 3, DAB current I flowing into the charging pile double-active bridge converter from a direct current bus is firstly2And a second current reference value I2refAnd (4) subtracting the difference value to obtain a difference value, and filtering out high-frequency ripples through a proportional-integral link PI regulation and low-pass filtering LPS. Then connected with the DC bus voltage UdcMultiplying and low-pass filtering the LPS again to obtain a second power reference value P2ref. And then obtaining a DAB droop control reference value U of the electric automobile through voltage power droop control2ref. Finally, DAB droop control reference value U of electric vehicle2refAnd DC bus voltage UdcSubtracting and adding a compensation value deltauAfter the proportional integral link PI adjustment, the current I is output with the battery of the electric automobileevAnd subtracting, and obtaining a difference value obtained by subtracting through a proportional integral link PI and phase shift control in sequence to obtain a phase shift angle of the charging pile double-active-bridge converter. The double-active-bridge converter adopts single phase-shifting control, a primary side switch tube of the double-active-bridge converter is controlled by a phase shifting angle of the energy-storage double-active-bridge converter, and a square wave signal which has the same frequency as the primary side phase-shifting frequency and is fixed in phase is added to a secondary side switch tube. As shown in fig. 3, a compensation value δ is added to the reference voltage for voltage power droop controluThereby to the DC bus voltage UdcSecondary voltage compensation correction is carried out to avoid the direct current bus voltage U caused by the inherent characteristic of droop controldcDeviating from the nominal value as the power changes. FIG. 4 shows the compensation value δuWherein 750V is the rated voltage to be controlled, and the voltage is the voltage U of the DC busdcThe difference obtained after subtraction is subjected to proportional-integral (PI) control and then an inertial delay time constant T is addedsSo as to avoid the disturbance of start and micro pulse, etc. caused by deltauAnd the rapid change of the voltage of the dc bus. At steady state, δuPerforming secondary voltage compensation to maintain the DC bus voltage UdcAnd stabilizing at the rated value.
The whole mode that combines together that adopts centralized control and distributed control of this embodiment, wherein the three-phase bridge converter of direct current bus and the boost converter of photovoltaic all adopt distributed control, and the two active bridge converters of energy storage and electric pile adopt the control mode that the centralized control based on flagging and based on current tracking combines together. According to the direction that different ports participate in the energy router and energy flows, the energy router has more than ten working condition forms, can be the four-port energy route of electric wire netting, energy storage, electric pile and photovoltaic, also can be photovoltaic, energy storage, electric pile three-port energy route under the off-grid state.
As shown in fig. 5, the centralized controller of the charging pile of the energy router works in a specific working condition based on the scheduling command of the upper-layer energy internet control platform, and collects the voltage U of the dc busdcDAB current I of energy storage double-active-bridge converter1DAB current I flowing into charging pile double-active-bridge converter2Photovoltaic output PpvCalculating the power required by the energy storage or the electric automobile according to the power balance principle together with the current electric quantity SOC signal of the energy storage, and then dividing the power by the rated voltage of the direct current bus to obtain a first current reference value I1refAnd a second current reference value I2refThis calculation method maintains power balance and voltage stability within the system. When the working condition is required to be switched, the energy storage and the accurate current tracking control of the double-active-bridge converter of the charging pile are relied on, the output of the parallel converter to be cut off is quickly reduced to zero and then cut off, or the parallel converter to be cut in is cut in when the output is zero and then quickly increased to the required output, so that the voltage and current jump caused in the working condition switching process is avoided, even the system is unstable, and the soft switching between different working conditions is realized. Because the control can realize the voltage control of the direct current bus while controlling the current (namely the power), the system is supported by the voltage source under any working condition, thereby keeping the voltage of the direct current bus stable. As for photovoltaic, MPPT control is always employed to maximize power output. The grid-connected voltage source type three-phase bridge converter (VSC) works in a stabilized power transmission mode, and works as a photovoltaic converter, an energy storage converter and an electric automobileWhen energy balance is realized, the power transmitted between the three-phase bridge converter and the power grid is zero, so that the photovoltaic energy storage electric automobile charging pile is cut off or cut in flexibly. When the energy storage or electric automobile charging pile needs to be cut off or cut into softly, only the reference current I needs to be used1refAnd I2refIt is only necessary to set to zero. Finally, when the transmission power of a certain converter is zero all the time within a certain time, each switching tube of the converter can be further locked, so that the loss is reduced. Finally, soft switching of any working condition of superior scheduling can be achieved, and the system can automatically average disturbances such as photovoltaic output change, so that the voltage deviation of the direct-current bus is within 0.5% in the working condition switching or steady-state operation process.
The operation of the specific switching regime is given below:
1. a grid-connected voltage source type three-phase bridge converter (VSC) is removed from the grid. Before 0.9 second, the energy storage, the electric automobile and the photovoltaic all work in a discharge state, and feed power to the power grid together. Fig. 7 shows the phase of the C phase voltage of the power grid and the inversion current of the three-phase bridge converter, the phase of the C phase current and the phase of the voltage (corresponding to the phase of the C phase voltage reduced by 20 times) at the power grid side are just reversed, the three-phase bridge converter works in an inversion power receiving state, the energy router charging pile can play a good role in supporting the large power grid, and the energy router charging pile responds to scheduling to feed power when needed.
And when 0.9 second, the dispatching instruction requires the working condition switching, the grid-connected mode is changed into the off-grid mode, and the energy balance is realized in the charging pile system of the energy router. During the operating condition switching process, the aim is to eliminate photovoltaic and energy storage output by the battery of the electric automobile. At this time, the reference discharge current of the electric vehicle is decreased, and as can be seen from fig. 7 and 8, the discharge current of the electric vehicle rapidly decreases until less than 0, and becomes a charging state, and the inverter current of the three-phase bridge converter also rapidly decreases. Finally, the photovoltaic and energy storage output of the electric vehicle battery is completely absorbed, and the transmission power between the three-phase bridge converter and the direct-current bus is zero. In order to further reduce unnecessary loss, after a delay control of 0.2 second, all the switch tubes of the three-phase bridge converter are locked, and at this time, the current of the three-phase bridge converter is completely zero, so that the working condition switching of the whole process is completed. It can be seen from the dc bus voltage curve of fig. 6 that the dc bus voltage fluctuation in the whole working condition switching process is very small, which is a soft switching process, and the validity of the coordinated unified control strategy is verified.
2. The cut-off energy storage double-active-bridge converter is connected with the direct-current bus 1. In the former working condition, the energy storage works in an off-grid state, the energy storage and the photovoltaic charge the electric automobile together, and the three ports participate in energy routing in the off-grid state. And when 0.9 second, the energy internet control platform detects that the photovoltaic output is rapidly increased, and then a working condition switching instruction is made to cut off the stored energy, so that the electric automobile completely consumes the photovoltaic output. As shown in fig. 10, the discharge current of the stored energy is rapidly decreased, and the excess energy is completely consumed by the electric vehicle. And when the discharging current of the stored energy is reduced to zero within 1.1 second, and after the preset delay of 0.2 second, the switching tube of the energy storage double-active-bridge converter is locked, so that the stored energy is completely cut off. And after the energy storage output is zero, the photovoltaic output is continuously increased until 1.2 seconds, at the moment, the photovoltaic output is completely absorbed by the electric automobile, and the system quickly enters a stable state. Similarly, it can be seen from fig. 9 that, during the whole operating condition switching process, the dc bus voltage hardly fluctuates, and stable soft switching from the three-port energy routing to the two-port operating condition is realized.
3. And the cut-off charging pile double-active-bridge converter is connected with the direct-current bus 1. In the former working condition, the energy storage works in an off-grid state, the energy storage and photovoltaic output charge the electric automobile together, and the whole system works in a three-port energy route in the off-grid state. When 0.9 second, energy internet control platform detects that electric automobile no longer need charge, needs to fill the electric pile excision. The stored energy is then scheduled such that its discharge current drops rapidly until the photovoltaic output is fully dissipated by changing to the charging mode. As shown in fig. 12, in the whole process, the power absorbed by the battery of the electric vehicle is rapidly reduced until the charging reference current is zero, and there is substantially no energy exchange between the electric vehicle and the dc bus. And after 0.2 second of delay, cutting off the double-active-bridge converter of the charging pile to complete soft switching of the whole working condition, and converting the three-port energy route of the system into a two-port energy route between the photovoltaic and the energy storage. In the whole working condition switching process, the photovoltaic output and the voltage waveform of the direct-current bus are as shown in fig. 11, and it can be seen that the photovoltaic output is kept unchanged in the whole working condition switching process, and the voltage of the direct-current bus is also basically kept unchanged.
Claims (5)
1. The utility model provides an energy router fills unified coordination control method of electric pile, includes the two active bridge converters of energy storage, fills electric pile two active bridge converters and boost converter who is connected with direct current bus, direct current bus passes through three-phase bridge converter and is connected with the electric wire netting, its characterized in that: the energy storage double-active bridge converter and the charging pile double-active bridge converter adopt a control method combining distributed control based on droop and centralized control based on current tracking; DAB current I is firstly carried out by the energy storage double-active-bridge converter1And a first current reference value I1refThe difference obtained by subtraction is subjected to proportional-integral (PI) adjustment and low-pass filtering (LPS) to remove high-frequency ripples, and then the high-frequency ripples are mixed with direct-current bus voltage UdcMultiplying and low-pass filtering the LPS again to obtain a first power reference value P1refAnd then obtaining the reference voltage U of the DAB droop control of the energy storage through the voltage and power droop control1refAnd finally storing energy DAB droop to control reference voltage U1refAnd DC bus voltage UdcSubtracting and adding a compensation value deltauAfter the proportional integral link PI adjustment, the current I is output with the energy storage batterybatAnd subtracting, wherein the difference obtained by subtracting is subjected to Proportional Integral (PI) and phase shift control in sequence to obtain a phase shift angle of the energy storage double-active-bridge converter, the double-active-bridge converter adopts single phase shift control, a primary side switch tube of the double-active-bridge converter is controlled by the phase shift angle of the energy storage double-active-bridge converter, and a square wave signal which has the same frequency as the primary side phase shift frequency and is fixed in phase is added to a secondary side switch tube.
2. The energy router charging post unified coordination control method according to claim 1, wherein said charging post double active bridge converter first flows DAB current I from DC bus into charging post double active bridge converter2And a second current reference value I2refThe difference obtained by subtraction is subjected to proportional-integral (PI) adjustment and low-pass filtering (LPS) to remove high-frequency ripples, and then the high-frequency ripples are mixed with direct-current bus voltage UdcMultiplying and low-pass filtering the LPS again to obtain a second power reference value P2refAnd then obtaining a DAB droop control reference value U of the electric automobile through voltage power droop control2refAnd finally, DAB droop control reference value U of electric automobile2refAnd DC bus voltage UdcSubtracting and adding a compensation value deltauAfter the proportional integral link PI adjustment, the current I is output with the battery of the electric automobileevAnd subtracting, wherein the difference obtained by subtracting is subjected to proportional-integral (PI) and phase shift control in sequence to obtain a phase shift angle of the charging pile double-active-bridge converter, the double-active-bridge converter adopts single phase shift control, a primary side switch tube of the double-active-bridge converter is controlled by the phase shift angle of the energy storage double-active-bridge converter, and a square wave signal which has the same frequency as the primary side phase shift frequency and is fixed in phase is added to a secondary side switch tube.
3. The unified and coordinated control method for the charging piles of the energy routers as claimed in claim 1, wherein the three-phase bridge converter adopts dq decoupled voltage-current double closed-loop control.
4. The unified coordination control method for the charging piles of the energy routers as claimed in claim 1, wherein the boost converter adopts a maximum power point tracking control mode.
5. The energy router charging pile unified coordination control method according to claim 1 or 2, characterized in that said first current reference value I1refAnd a second current reference value I2refCalculated by a centralized controller of the charging pile of the energy router, and the controller collects the voltage U of the direct current busdcDAB current I of energy storage double-active-bridge converter1DAB current I flowing into charging pile double-active-bridge converter2Photovoltaic output PpvAnd the current electric quantity SOC signal of the stored energy calculates the stored energy or the electric steam according to the power balance principleThe power required by the vehicle is then divided by the rated voltage of the dc bus.
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| CN111244932B (en) * | 2020-02-24 | 2021-07-06 | 国网江苏省电力有限公司 | Energy storage multi-working-condition operation control method and device for energy router |
| CN112310973B (en) * | 2020-12-29 | 2021-04-20 | 中国电力科学研究院有限公司 | Voltage stabilization control method and system, charging pile and charging station |
| CN112865063B (en) * | 2021-01-12 | 2023-02-21 | 中铁电气化局集团有限公司 | Energy router, vehicle operation control method, and storage medium |
| CN114825407B (en) * | 2022-06-22 | 2022-10-18 | 锦浪科技股份有限公司 | Charging and discharging switching method, device, system and medium of bidirectional converter |
| CN116526445B (en) * | 2023-05-10 | 2024-02-02 | 北京索英电气技术股份有限公司 | Energy router |
| CN116827152B (en) * | 2023-08-24 | 2023-11-14 | 国网上海能源互联网研究院有限公司 | Coordinated control method, device, equipment and medium for energy storage converter |
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