CN113258636A - Frequency division-based self-adaptive feedforward compensation method and controller for full-active composite energy storage system - Google Patents
Frequency division-based self-adaptive feedforward compensation method and controller for full-active composite energy storage system Download PDFInfo
- Publication number
- CN113258636A CN113258636A CN202110476485.1A CN202110476485A CN113258636A CN 113258636 A CN113258636 A CN 113258636A CN 202110476485 A CN202110476485 A CN 202110476485A CN 113258636 A CN113258636 A CN 113258636A
- Authority
- CN
- China
- Prior art keywords
- current
- energy storage
- storage unit
- bus
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/00714—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current
-
- 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
- H02J15/00—Systems for storing electric energy
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0025—Sequential battery discharge in systems with a plurality of batteries
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a self-adaptive feedforward compensation method and a controller of a full-active composite energy storage system based on frequency division, wherein the method comprises the following steps: acquiring the end voltage of a direct current bus, load current, the end voltage of each energy storage unit and the cut-off frequency of a frequency division filter; performing PI control according to the difference value between the voltage of the direct current bus and the given voltage to obtain a current given value of the direct current bus; calculating a current feedforward compensation value of the direct current bus according to the terminal voltage of each energy storage unit, the load current and the cut-off frequency of the frequency division filter; taking the sum of the current set value of the direct current bus and the current feedforward compensation value, carrying out frequency division by using a frequency division filter, and respectively taking the obtained high-frequency and low-frequency current values as the current set values of the energy storage units with different response times; and performing PI control on each energy storage unit based on the self current given value and the real-time current. The invention can realize the rapid following and power balance of the load current in the composite energy storage system, improve the load response performance of the system and reduce the voltage fluctuation of the bus.
Description
Technical Field
The invention belongs to the technical field of energy storage systems, and particularly relates to a frequency division-based self-adaptive feedforward compensation method and a frequency division-based self-adaptive feedforward compensation controller for a full-active composite energy storage system.
Background
In a full-active composite energy storage system composed of a lithium battery-super capacitor or batteries of different types and the like, a filter can be adopted to distribute power to a load, so that energy storage elements with relatively high response speeds, such as the super capacitor and a lithium titanate battery (not limited to the super capacitor and the lithium titanate battery, bear high-frequency current, energy storage elements with relatively low response speeds, such as a lithium iron phosphate battery and a ternary lithium battery (not limited to the super capacitor and the lithium titanate battery), bear low-frequency current, the currents of the two energy storage elements are directly controlled by a DCDC converter, and the voltage stability of a direct current bus end is ensured. The composite energy storage system is widely applied to electric vehicles, micro-grids and the like. In the charging and discharging processes of the composite energy storage system, the load current changes in real time and is difficult to predict. The power balance process of the direct current bus end is 'load current change-bus voltage change-voltage PI adjusts bus current give-filter redistributes current give-energy storage element current PI adjusts actual current-bus current is equal to load current', and the process has the following technical problems: (1) large bus voltage fluctuation can be generated, circuit element aging can be accelerated, and even circuit elements can be damaged; (2) the adjustment time is long, so that the load change response capability of the composite energy storage system is poor; (3) the power imbalance during the regulation process may not meet the load demand.
The existing feedforward compensation method of the composite energy storage system does not perform self-adaptive adjustment according to the real-time voltage, current and cut-off frequency of the energy storage system, and still has larger voltage fluctuation of a bus when the load current changes. Therefore, it is necessary to design a solution to solve the power imbalance problem, so as to reduce the voltage fluctuation of the bus and accelerate the load response speed of the energy storage system under the condition that the real-time voltage, current and cut-off frequency value of the energy storage system change.
Disclosure of Invention
The invention aims to provide a self-adaptive feedforward compensation method and a controller of a full-active composite energy storage system based on frequency division, aiming at the defects of the prior art, and the method and the controller can realize the quick follow-up and power balance of load current in the composite energy storage system, improve the load response performance of the system and reduce the voltage fluctuation of a bus.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
a self-adaptive feedforward compensation method of a full-active composite energy storage system based on frequency division comprises two types of energy storage units with different response speeds, wherein the energy storage unit with a high response speed is set as A, the energy storage unit with a low response speed is set as B, the output end of the composite energy storage system provides power for a load through a direct current bus, and the self-adaptive feedforward compensation method comprises the following steps:
step 2, comparing the collected voltage of the direct current bus terminal with a given voltage, and performing PI control by using a comparison difference value to obtain a current given value of the direct current bus;
step 3, calculating a current feedforward compensation value of the direct current bus according to the terminal voltage of each energy storage unit, the load current and the cut-off frequency of the frequency division filter;
step 4, taking the sum of the current set value of the direct current bus and the current feedforward compensation value, carrying out frequency division by using a frequency division filter, and respectively using the obtained high-frequency current value and low-frequency current value as the current set values of the energy storage unit A and the energy storage unit B;
and 5, performing PI control on each energy storage unit based on the current set value of the energy storage unit and the current value of the energy storage unit acquired in real time.
In the charging and discharging process of the composite energy storage system, the bus voltage is ensured to be equal to a given voltage, namely, the current output by the two energy storage elements is ensured to be equal to the bus current, and the power supply and demand balance is realized; specifically, in the charging and discharging process of the composite energy storage system, the load current changes in real time, the current inner loop setting can be changed by calculating the real-time self-adaptive feedforward compensation current value before the load current causes the bus voltage change, a voltage loop PI controller with a large time constant is skipped, the actual output current is directly controlled, the currents output by the two energy storage elements and the bus current are accelerated to be equal to the load current, and the load response is accelerated.
In a more preferred embodiment, the current feedforward compensation value is calculated by the following expression:
in the formula IcompFor the current feed-forward compensation value to be calculated, VbusFor the currently acquired DC bus terminal voltage, VAFor the currently acquired terminal voltage, V, of the energy storage unit ABFor the currently acquired terminal voltage, f, of the energy storage unit BcFor the cut-off frequency of the currently acquired crossover filter, IloadIs the currently collected load current.
In a more preferred technical scheme, the steps 1 to 5 are repeatedly and periodically executed, so that the direct current bus voltage is quickly recovered and stabilized.
In a more preferred technical scheme, the terminal voltage of a direct current bus and the terminal voltages of all energy storage elements are acquired through a voltage sensor, and the load current and the current of all the energy storage elements are acquired through a current sensor; the cut-off frequency of the filter is read by the controller.
In a more preferred technical scheme, when each energy storage unit is subjected to PI control, the output control signal drives the corresponding PWM module to generate a complementary duty ratio, and the duty ratio signal is used for controlling the on-off of the corresponding bidirectional DCDC circuit; the low-voltage side of the bidirectional DCDC circuit is an energy storage unit, the high-voltage side of the bidirectional DCDC circuit is a direct-current bus end, and the output ends of the bidirectional DCDC circuits of the energy storage unit A and the energy storage unit B are connected to the direct-current bus in parallel.
The utility model provides a full active compound energy storage system's self-adaptation feedforward compensation controller based on frequency division, compound energy storage system includes two kinds of energy storage units that response speed is different, establishes the energy storage unit that response speed is fast and is A, and the energy storage unit that response speed is slow is B, compound energy storage system's output provides the power through direct current bus to the load, the self-adaptation feedforward compensation controller includes: the device comprises a sensor acquisition module, a feedforward compensation module, a voltage control module, a filter frequency division module, a current control module A, a current control module B, a signal driving module A and a signal driving module B;
the sensor acquisition module is used for: acquiring the terminal voltage of a direct current bus, the current of a load, the terminal voltage and the current of each energy storage unit and the cut-off frequency of a frequency division filter in real time;
the feed forward compensation module is configured to: calculating a current feedforward compensation value of the direct current bus according to the terminal voltage of each energy storage unit, the load current and the cut-off frequency of the frequency division filter;
the voltage control module is used for: comparing the collected voltage of the direct current bus with a given voltage, and performing PI control by using a comparison difference value to obtain a current given value of the direct current bus;
the filter frequency division module is used for: dividing the sum of the current given value and the current feedforward compensation value of the direct current bus, and outputting a high-frequency current value and a low-frequency current value which are respectively used as the current given values of the energy storage unit A and the energy storage unit B;
the current control module A is used for: performing PI closed-loop control on the energy storage unit A according to the difference value between the real-time current of the energy storage unit A and the current set value, and outputting a driving signal A;
the driving module A is used for: converting the driving signal A to obtain a complementary on-off driving signal A of the bidirectional DCDC of the energy storage unit A;
the current control module B is used for: performing PI closed-loop control on the energy storage unit B according to the difference value between the real-time current and the current given value of the energy storage unit B, and outputting a driving signal B;
the driving module B is used for: and converting the driving signal B to obtain a complementary on-off driving signal B of the bidirectional DCDC of the energy storage unit B.
In a more preferred technical solution, the feedforward compensation module calculates an expression of a current feedforward compensation value of the dc bus as follows:
in the formula IcompFor the current feed-forward compensation value to be calculated, VbusFor the currently acquired DC bus terminal voltage, VAFor the currently acquired terminal voltage, V, of the energy storage unit ABFor the currently acquired terminal voltage, f, of the energy storage unit BcFor the cut-off frequency of the currently acquired crossover filter, IloadIs the currently collected load current.
The modules are functionally divided, and in an actual implementation process, the functions of one or more modules may be integrated in the same hardware element to implement the functions. And voltage and current signals acquired by the sensing acquisition module are transmitted to the voltage and current control module to carry out traditional cascade control. The key point of the invention is the protection of the feedforward compensation module, and the key point is that the current given signal output by the voltage outer ring PI control is added with the bus current compensation signal calculated by the feedforward compensation module to generate the final bus current given.
Advantageous effects
1. The invention can calculate the real-time bus current compensation value based on the terminal voltage of the direct current bus, the terminal voltage of the energy storage element with different response times, the load current and the cut-off frequency of the filter, thereby realizing the rapid following of the load current and the power supply and demand balance.
2. The feedforward compensation method can generate a current feedforward compensation signal before the load current causes the change of the bus voltage, so that the current inner loop acts in advance, a voltage PI link with a larger time constant is skipped, the feedforward compensation method belongs to advanced compensation, the fluctuation of the bus voltage during the load change can be reduced, and the load response speed is accelerated.
3. The feedforward compensation method has high adaptivity, and the most appropriate current compensation value is calculated when the voltage of the energy storage element, the bus voltage, the load current and the cut-off frequency change.
4. The invention aims at the self-adaptive feedforward compensation of the full-active composite energy storage system adopting the filter for frequency division, has no special requirements on the type of an energy storage element, a power frequency division (cutoff frequency calculation) algorithm and a hardware circuit of the energy storage system, and has higher applicability.
Drawings
Fig. 1 is a schematic block diagram of a fully active hybrid energy storage system according to an embodiment of the present invention;
fig. 2 is a control block diagram of a frequency division-based full-active hybrid energy storage system according to an embodiment of the present invention;
fig. 3 is a schematic circuit diagram provided by an example of the present invention.
Detailed Description
The following describes embodiments of the present invention in detail, which are developed based on the technical solutions of the present invention, and give detailed implementation manners and specific operation procedures to further explain the technical solutions of the present invention.
Example 1
Referring to fig. 1, the present embodiment provides a self-adaptive feedforward compensation method for a frequency division based full-active composite energy storage system, where the composite energy storage system includes two types of energy storage units with different response speeds, where the energy storage unit with a fast response speed is a, the energy storage unit with a slow response speed is B, and an output end of the composite energy storage system provides power to a load through a dc bus, that is, the energy storage unit is a, and is connected to the dc bus through one bidirectional DCDC circuit, and the energy storage unit B is connected to the dc bus through another bidirectional DCDC circuit, so as to jointly use power supply or feedback of a load end of the dc bus. The energy storage unit a in the invention can be a super capacitor, a lithium titanate battery and the like (not limited to the two types) with a relatively fast response speed, and the energy storage unit B can be a lithium iron phosphate battery, a ternary lithium battery and the like (not limited to the two types) with a relatively slow response speed.
The adaptive feedforward compensation method described in this embodiment repeatedly and periodically performs the following steps:
And 2, comparing the collected voltage of the direct current bus terminal with a given voltage, and performing PI control by using the comparison difference value to obtain a current given value of the direct current bus.
Step 3, calculating a current feedforward compensation value of the direct current bus according to the end voltage of each energy storage unit, the load current and the cut-off frequency of the frequency division filter and the following expression:
in the formula IcompFor the current feed-forward compensation value to be calculated, VbusFor the currently acquired DC bus terminal voltage, VAFor the currently acquired terminal voltage, V, of the energy storage unit ABFor the currently acquired terminal voltage, f, of the energy storage unit BcFrequency division filter for current acquisitionCut-off frequency of (I)loadIs the currently collected load current.
And 4, taking the sum of the current set value of the direct current bus and the current feedforward compensation value, carrying out frequency division by using a frequency division filter, and respectively using the obtained high-frequency current value and low-frequency current value as the current set values of the energy storage unit A and the energy storage unit B.
And 5, performing PI control on each energy storage unit based on the current set value and the real-time current of the energy storage unit. When each energy storage unit is subjected to PI control, the output control signal drives the corresponding PWM module to generate a complementary duty ratio, and the duty ratio signal is used for controlling the on-off of the corresponding bidirectional DCDC circuit; the low-voltage side of the bidirectional DCDC circuit is an energy storage unit, the high-voltage side of the bidirectional DCDC circuit is a direct-current bus end, and the output ends of the bidirectional DCDC circuits of the energy storage unit A and the energy storage unit B are connected to the direct-current bus in parallel.
Example 2
This embodiment provides a frequency division based adaptive feedforward compensation controller for a full-active composite energy storage system corresponding to the method described in embodiment 1, where the composite energy storage system includes two types of energy storage units with different response speeds, and the energy storage unit with a high response speed is a, and the energy storage unit with a low response speed is B, the output end of the composite energy storage system provides power to a load through a dc bus, that is, the energy storage unit is a, and is connected to the dc bus through one bidirectional DCDC circuit, and the energy storage unit B is connected to the dc bus through another bidirectional DCDC circuit, so as to jointly use the power supply or feedback of the load end of the dc bus.
The adaptive feedforward compensation controller described in this embodiment includes: the device comprises a sensor acquisition module, a feedforward compensation module, a voltage control module, a filter frequency division module, a current control module A, a current control module B, a signal driving module A, a signal driving module B and a power supply module. As shown in fig. 3, the energy storage unit a and the energy storage unit B are connected to the dc bus through a Buck-Boost bidirectional DCDC circuit. In the present embodiment, the input signal of the bidirectional DCDC circuit is a PWM signal, so the circuit switch can use an existing semiconductor switch.
The feedforward compensation module, the voltage control module, the current control module and the filter frequency division module are all integrated in a control chip DSP28335, and a specific control block diagram is shown in FIG. 2. Firstly, a control chip DSP28335 receives a direct current bus voltage signal from a sensing acquisition module, inputs the direct current bus voltage signal and the error of a given voltage value into a voltage control module to generate a current given value of a direct current bus, adds the current given value of the direct current bus and a current feedforward compensation value of the direct current bus calculated by a feedforward compensation module to be used as the current given value of the actual direct current bus, and inputs the current given value of the actual direct current bus into a filter frequency division module; the filter frequency division module performs high-low frequency separation on an actual current given value of the direct current bus based on the current cut-off frequency, wherein the high-frequency part is given as the current of the energy storage unit A, and the low-frequency part is given as the current of the energy storage unit B; then, the current controller arranged corresponding to the energy storage unit differentiates the real-time collected current of the energy storage unit per se, performs current PI control and outputs a PWM signal; the feedforward compensation module needs to receive a terminal voltage signal of a direct current bus from the sensing acquisition module, a terminal voltage signal of the energy storage unit A and a terminal voltage signal of the energy storage unit B, a load current signal and a cut-off frequency signal, and calculates a current feedforward compensation value of the direct current bus. The signal driving module needs to amplify the power of two paths of PWM signals output by the controller DSP28335 and generate two paths of PWM signals with complementary high and low levels to drive an upper switching tube and a lower switching tube in the Buck-Boost bidirectional DCDC circuit. And the power supply module provides power for the whole full-active composite energy storage system.
Controller DSP 28335: the method is used for voltage and current control, filter frequency division and feedforward compensation of the full-active composite energy storage system. In this example, the controller only needs one, and the voltage, current control, power distribution and feed forward compensation are all implemented by C language programs inside the controller DSP 28335. In this embodiment, the DSP28335 controller is connected to the sensing acquisition module and the signal driving module through GPIO ports. Wherein, the filter frequency division module
The signal driving module: and a control signal of the controller DSP28335 is received, level conversion is carried out, the control signal is converted into a complementary driving signal of the Buck-Boost bidirectional DCDC circuit switch, the on-off of a controllable switch of the Buck-Boost bidirectional DCDC circuit can be controlled, and the current output of the energy storage elements 1 and 2 is controlled.
The sensing acquisition module: including a voltage sensor to collect the bus voltage and the energy storage element 12, and a current sensor to collect the load current.
The power supply module: the direct-current 24V voltage provides power for the whole full-active composite energy storage system after passing through the power conversion module, and the direct-current 24V voltage is converted into plus/minus 15V positive and negative voltage to supply power for the sensing acquisition module. The converted to 5V power supply is used to power the controller DSP 28335.
The above embodiments are preferred embodiments of the present application, and those skilled in the art can make various changes or modifications without departing from the general concept of the present application, and such changes or modifications should fall within the scope of the claims of the present application.
Claims (7)
1. The utility model provides a full active compound energy storage system's self-adaptation feedforward compensation method based on frequency division, compound energy storage system includes two kinds of energy storage units that response speed is different, and the energy storage unit that response speed is fast is established and is A, and the energy storage unit that response speed is slow is B, compound energy storage system's output provides the power through direct current bus to the load, its characterized in that, the self-adaptation feedforward method includes:
step 1, acquiring the terminal voltage of a direct current bus, the current of a load, the terminal voltage and the current of each energy storage unit and the cut-off frequency of a frequency division filter in real time;
step 2, comparing the collected voltage of the direct current bus terminal with a given voltage, and performing PI control by using a comparison difference value to obtain a current given value of the direct current bus;
step 3, calculating a current feedforward compensation value of the direct current bus according to the terminal voltage of each energy storage unit, the load current and the cut-off frequency of the frequency division filter;
step 4, taking the sum of the current set value of the direct current bus and the current feedforward compensation value, carrying out frequency division by using a frequency division filter, and respectively using the obtained high-frequency current value and low-frequency current value as the current set values of the energy storage unit A and the energy storage unit B;
and 5, performing PI control on each energy storage unit based on the current set value of the energy storage unit and the current value of the energy storage unit acquired in real time.
2. The method of claim 1, wherein the current feedforward compensation value is calculated by the expression:
in the formula IcompFor the current feed-forward compensation value to be calculated, VbusFor the currently acquired DC bus terminal voltage, VAFor the currently acquired terminal voltage, V, of the energy storage unit ABFor the currently acquired terminal voltage, f, of the energy storage unit BcFor the cut-off frequency of the currently acquired crossover filter, IloadIs the currently collected load current.
3. The method of claim 1, wherein steps 1-5 are repeated periodically to allow the dc bus voltage to quickly return to steady state.
4. The method of claim 1, wherein the terminal voltage of the dc bus and the terminal voltage of each energy storage element are collected by a voltage sensor, and the load current and the current of each energy storage element are collected by a current sensor; the cut-off frequency of the filter is read by the controller.
5. The method according to claim 1, wherein when each energy storage unit is subjected to PI control, the output control signal drives the corresponding PWM module to generate a complementary duty ratio, and the duty ratio signal is used for controlling the on-off of the corresponding bidirectional DCDC circuit; the low-voltage side of the bidirectional DCDC circuit is an energy storage unit, the high-voltage side of the bidirectional DCDC circuit is a direct-current bus end, and the output ends of the bidirectional DCDC circuits of the energy storage unit A and the energy storage unit B are connected to the direct-current bus in parallel.
6. The utility model provides a full active compound energy storage system's self-adaptation feedforward compensation controller based on frequency division, compound energy storage system includes two types of energy storage units that response speed is different, establishes the energy storage unit that response speed is fast and is A, and the energy storage unit that response speed is slow is B, compound energy storage system's output provides the power through direct current bus to the load, its characterized in that, the self-adaptation feedforward compensation controller includes: the device comprises a sensor acquisition module, a feedforward compensation module, a voltage control module, a filter frequency division module, a current control module A, a current control module B, a signal driving module A and a signal driving module B;
the sensor acquisition module is used for: acquiring the terminal voltage of a direct current bus, the current of a load, the terminal voltage and the current of each energy storage unit and the cut-off frequency of a frequency division filter in real time;
the feed forward compensation module is configured to: calculating a current feedforward compensation value of the direct current bus according to the terminal voltage of each energy storage unit, the load current and the cut-off frequency of the frequency division filter;
the voltage control module is used for: comparing the collected voltage of the direct current bus with a given voltage, and performing PI control by using a comparison difference value to obtain a current given value of the direct current bus;
the filter frequency division module is used for: dividing the sum of the current given value and the current feedforward compensation value of the direct current bus, and outputting a high-frequency current value and a low-frequency current value which are respectively used as the current given values of the energy storage unit A and the energy storage unit B;
the current control module A is used for: performing PI closed-loop control on the energy storage unit A according to the difference value between the real-time current of the energy storage unit A and the current set value, and outputting a driving signal A;
the driving module A is used for: converting the driving signal A to obtain a complementary on-off driving signal A of the bidirectional DCDC of the energy storage unit A;
the current control module B is used for: performing PI closed-loop control on the energy storage unit B according to the difference value between the real-time current and the current given value of the energy storage unit B, and outputting a driving signal B;
the driving module B is used for: and converting the driving signal B to obtain a complementary on-off driving signal B of the bidirectional DCDC of the energy storage unit B.
7. An adaptive feedforward compensation controller according to claim 1, wherein the feedforward compensation module calculates the current feedforward compensation value for the dc bus by:
in the formula IcompFor the current feed-forward compensation value to be calculated, VbusFor the currently acquired DC bus terminal voltage, VAFor the currently acquired terminal voltage, V, of the energy storage unit ABFor the currently acquired terminal voltage, f, of the energy storage unit BcFor the cut-off frequency of the currently acquired crossover filter, IloadIs the currently collected load current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110476485.1A CN113258636A (en) | 2021-04-29 | 2021-04-29 | Frequency division-based self-adaptive feedforward compensation method and controller for full-active composite energy storage system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110476485.1A CN113258636A (en) | 2021-04-29 | 2021-04-29 | Frequency division-based self-adaptive feedforward compensation method and controller for full-active composite energy storage system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113258636A true CN113258636A (en) | 2021-08-13 |
Family
ID=77223624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110476485.1A Withdrawn CN113258636A (en) | 2021-04-29 | 2021-04-29 | Frequency division-based self-adaptive feedforward compensation method and controller for full-active composite energy storage system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113258636A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114268114A (en) * | 2021-12-20 | 2022-04-01 | 安徽农业大学 | Secondary voltage compensation method for hybrid energy storage system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106058929A (en) * | 2016-07-02 | 2016-10-26 | 许昌学院 | Distributed power system based on DC/AC bidirectional current transformer control |
| EP3092695A1 (en) * | 2014-01-08 | 2016-11-16 | ABB Research Ltd. | Method and apparatus for controlling a hybrid energy storage system |
| CN109066647A (en) * | 2018-09-01 | 2018-12-21 | 哈尔滨工程大学 | A kind of half is isolated four port hybrid energy storage devices and control method |
| CN111478306A (en) * | 2020-05-14 | 2020-07-31 | 山西大学 | Novel strategy for inhibiting voltage fluctuation of composite energy storage DC micro-grid bus |
| CN112436766A (en) * | 2020-12-03 | 2021-03-02 | 华中科技大学 | Load disturbance resisting control device and method for brushless doubly-fed generator |
| CN112448395A (en) * | 2020-11-18 | 2021-03-05 | 山西大学 | Hybrid energy storage power distribution network dynamic voltage restorer and operation mode thereof |
-
2021
- 2021-04-29 CN CN202110476485.1A patent/CN113258636A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3092695A1 (en) * | 2014-01-08 | 2016-11-16 | ABB Research Ltd. | Method and apparatus for controlling a hybrid energy storage system |
| CN106058929A (en) * | 2016-07-02 | 2016-10-26 | 许昌学院 | Distributed power system based on DC/AC bidirectional current transformer control |
| CN109066647A (en) * | 2018-09-01 | 2018-12-21 | 哈尔滨工程大学 | A kind of half is isolated four port hybrid energy storage devices and control method |
| CN111478306A (en) * | 2020-05-14 | 2020-07-31 | 山西大学 | Novel strategy for inhibiting voltage fluctuation of composite energy storage DC micro-grid bus |
| CN112448395A (en) * | 2020-11-18 | 2021-03-05 | 山西大学 | Hybrid energy storage power distribution network dynamic voltage restorer and operation mode thereof |
| CN112436766A (en) * | 2020-12-03 | 2021-03-02 | 华中科技大学 | Load disturbance resisting control device and method for brushless doubly-fed generator |
Non-Patent Citations (1)
| Title |
|---|
| YUE WU; ZHIWU HUANG: "An Improved Feed-Forward Load Compensation Method for Hybrid Energy Storage Systems", 《2019 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION (ECCE)》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114268114A (en) * | 2021-12-20 | 2022-04-01 | 安徽农业大学 | Secondary voltage compensation method for hybrid energy storage system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8159850B2 (en) | Converter control device | |
| CN106169868B (en) | The DC converter topology and its feed-forward type Average Current Control method of width input | |
| CN103973105B (en) | A kind of high-power bidirectional DC/DC converter high dynamic performance control methods | |
| CN108512452B (en) | Control system and control method for current of direct-current micro-grid-connected converter | |
| CN109378881B (en) | Bidirectional self-adaptive equalization control method for power battery pack | |
| CN113135109B (en) | Topological structure of high-power charging device of electric automobile | |
| CN105553274A (en) | Current critical continuous unified control method for bidirectional DC-DC converter | |
| CN105305505A (en) | Photovoltaic grid-connected inverter with voltage control function | |
| CN109980918A (en) | A kind of reverse coupled high gain boost Cuk circuit and its fuzzy control method | |
| CN108736479A (en) | A kind of adaptive fining harmonic compensation method and device based on photovoltaic parallel in system | |
| CN112217194B (en) | Direct-current voltage deviation suppression method based on disturbance observer feedforward current control | |
| CN114784898A (en) | Control and design method of self-adaptive current control circuit of parallel battery cluster | |
| CN117526718B (en) | Control method of DC/DC converter and DC/DC converter | |
| CN113258636A (en) | Frequency division-based self-adaptive feedforward compensation method and controller for full-active composite energy storage system | |
| CN107696893B (en) | Electric vehicle V2G charging and discharging method based on active disturbance rejection control technology | |
| CN106877646A (en) | Wireless voltage feedforward control system and method suitable for being input into series connection/output-parallel system | |
| CN112803767B (en) | DC/DC converter control system for charging/discharging power battery | |
| CN110868091A (en) | Nonlinear control method of vehicle-mounted charger PFC converter based on differential flatness | |
| CN114696616A (en) | Three-port high-gain boost DC/DC converter based on differential connection and control method thereof | |
| CN109103873B (en) | High-capacity direct-current energy storage device with direct-current DVR | |
| CN114336574A (en) | Parallel current-sharing control method for direct-current power supply modules | |
| CN209948984U (en) | Power converter device | |
| CN110912247A (en) | Method for stabilizing fluctuation of direct-current bus voltage | |
| CN112350606A (en) | Port control device and method of photovoltaic system and photovoltaic system | |
| Zheng et al. | An intelligent charging control method for electric vehicle charging system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20210813 |