CN108551258B - RBF network supervision system and method of bidirectional DC-DC converter for storage battery - Google Patents
RBF network supervision system and method of bidirectional DC-DC converter for storage battery Download PDFInfo
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- CN108551258B CN108551258B CN201810261453.8A CN201810261453A CN108551258B CN 108551258 B CN108551258 B CN 108551258B CN 201810261453 A CN201810261453 A CN 201810261453A CN 108551258 B CN108551258 B CN 108551258B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/14—Arrangements for reducing ripples from dc input or output
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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
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/20—Charging or discharging characterised by the power electronics converter
Abstract
The invention aims to solve the technical problem of providing an RBF network supervision system and an RBF network supervision method of a bidirectional DC-DC converter for a storage battery, which improve the double closed-loop control technology of the traditional PI regulation by introducing RBF network control, realize the compound control of the system and solve the problem of low precision of the current bidirectional DC-DC converter. In order to solve the technical problems, the invention provides an RBF network supervision system of a bidirectional DC-DC converter for a storage battery, which comprises a main circuit of the double bidirectional DC-DC converter, a feed control circuit and a charging control circuit; the main circuit of the double bidirectional DC-DC converter can be selectively connected with the feed control circuit and the charging control circuit. The invention has the effects of effectively adjusting the nonlinear characteristic of the storage battery and having good control performance.
Description
Technical Field
The invention belongs to the technical field of converters, and particularly relates to an RBF network supervision system and method of a bidirectional DC-DC converter for a storage battery.
Background
With the development of power electronics technology, batteries and bidirectional DC-DC converters are increasingly used in fields such as electric automobiles, micro-grids, energy storage systems and the like. The storage battery is used as electrochemical energy storage equipment, has the characteristics of short construction period, low operation cost, no influence on the environment and the like, and has become a preferred scheme for solving the problem of new energy access by applying an energy storage technology to a power grid. Among the batteries used in the battery energy storage system, the batteries with wider application are lithium batteries, lead-acid batteries, sodium-sulfur batteries, lead-carbon batteries, etc. However, the service life of the storage battery is limited by a plurality of factors, particularly the charging and discharging process has a great influence on the capacity and service life of the storage battery, so that the design of a control strategy of the converter matched with the storage battery is very critical, and the influence on the service life of the storage battery should be avoided as much as possible.
The storage battery and the switching devices, the inductance and the capacitance and the like in the converter circuit cause a plurality of nonlinear factors in the charging and feeding process of the storage battery, so that a plurality of students study the control strategy of the bidirectional DC-DC converter, and a PID double-closed-loop control strategy or a nonlinear PID decoupling control strategy is typical. However, the conventional PID controller often ignores the nonlinear characteristic of the load in the modeling process, so that the converter system has defects in control precision and the like.
Disclosure of Invention
According to the defects of the prior art, the technical problem to be solved by the invention is to provide an RBF network supervision system and method of the bidirectional DC-DC converter for the storage battery, wherein the RBF network is adopted to carry out a supervision control strategy of a PID controller, and the RBF network control is introduced to improve the double closed loop control technology of the traditional PI regulation, so that the composite control of the system is realized, the problem of low precision of the current bidirectional DC-DC converter is solved, and the system has the effects of effectively regulating the nonlinear characteristic of the storage battery and having good control performance.
In order to solve the technical problems, the invention adopts the following technical scheme:
an RBF network supervision system of a bidirectional DC-DC converter for a storage battery comprises a main circuit of the double bidirectional DC-DC converter, a feed control circuit and a charging control circuit; the main circuit of the double bidirectional DC-DC converter can be selectively connected with the feed control circuit and the charging control circuit.
Preferably, the main circuit of the double bidirectional DC-DC converter comprises a power supply, a load and a first filter capacitor C b A second filter capacitor C d First inductor L A Second inductance L B The switching circuit comprises a first switching tube circuit, a second switching tube circuit, a third switching tube circuit and a fourth switching tube circuit; the first switching tube circuit, the second switching tube circuit, the third switching tube circuit and the fourth switching tube circuit are formed by IGBT; the upper bridge arm and the lower bridge arm of the switching tube circuit are complementarily conducted, a bridge arm A is formed by a first switching tube circuit and a second switching tube circuit, an IGBT emitter of the first switching tube circuit is connected with an IGBT collector of the second switching tube circuit, a bridge arm B is formed by a third switching tube circuit and a fourth switching tube circuit, an IGBT emitter of the third switching tube circuit is connected with an IGBT collector of the fourth switching tube circuit, and a first filter capacitor C is formed by the IGBT emitter of the third switching tube circuit and the IGBT collector of the fourth switching tube circuit b Connected in parallel with two ends of the power supply, a first inductance L A And a second inductance L B One end of the second filter capacitor C is connected with the positive electrode of the power supply, the other end is connected with the emitter electrodes of the first switch tube circuit and the second switch tube circuit respectively d Connected in parallel across the load.
Preferably, each IGBT switching tube is connected in anti-parallel with a freewheeling diode.
Preferably, the feed control circuit comprises a voltage outer loop, a current inner loop, an RBF network, a PWM modulator, a PI regulator, a limiting link and a delay link.
Preferably, the charging control circuit comprises a voltage outer loop, a current inner loop, a PWM modulator, a PI regulator, a limiting link and a delay link.
Preferably, the feed control circuit and the charging control circuit are connected with the main circuit of the double bidirectional DC-DC converter through a mode selection switch to control the bidirectional DC-DC converter.
Preferably, the RBF network structure adopts a 1-J-1 type structure, a single-node input layer transmits signals to an hidden layer, the central vector and the width vector of J units of the hidden layer are predetermined, and the weight between the hidden layer and an output layer of the network is adjustable; the hidden layer performs a fixed nonlinear transformation that maps the input space to a hidden layer space containing J units where the output layer performs linear combinations.
A method of RBF network supervision of a bi-directional DC-DC converter for a battery, the method comprising:
adopting a complementary conduction mode of an upper bridge arm and a lower bridge arm of a switching tube circuit; when the first switching tube and the third switching tube work, the circuit operates in a Buck mode, namely a charging state, and when the second switching tube and the fourth switching tube work, the circuit operates in a Boost mode, namely a feeding state;
when the feeding and charging working modes are switched, a composite controller is formed by an RBF network and a PI controller, the system is PI controlled in the initial stage, and when the system reaches a steady state, the system is integrated with the RBF network for supervision control; when a large error occurs in the control process, PI control plays a leading role, and the RBF network plays a regulating role.
The invention has the beneficial effects that:
1. the battery has good dynamic characteristics in the processes of battery charge and discharge, charge and discharge switching and constant voltage and constant current switching.
2. The nonlinear property of the system can be effectively improved, and the control precision of the system is improved.
3. The voltage and current ripple characteristic of the battery side of the converter is improved, the waveform is smooth, and therefore the charge and discharge quality of the battery is improved, and the service life of the storage battery is prolonged.
4. Has higher reliability.
5. The converter under supervision of the RBF network can use a more economical filter.
Drawings
The contents expressed in the drawings of the present specification and the marks in the drawings are briefly described as follows:
fig. 1 is a schematic diagram of a dual bi-directional DC-DC converter main circuit according to an embodiment of the present invention.
Fig. 2 is a feed control circuit of an embodiment of the present invention.
Fig. 3 is a charge control circuit of an embodiment of the present invention.
Fig. 4 is a block diagram of an RBF neural network according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention, such as the shape and construction of the components, the mutual positions and connection relationships between the components, the roles and working principles of the components, the manufacturing process and the operating and using method, etc., will further explain the present invention in detail, so as to help those skilled in the art to more fully understand the present invention.
An RBF network supervision system of a bidirectional DC-DC converter for a storage battery comprises a main circuit of the double bidirectional DC-DC converter, a feed control circuit and a charging control circuit; the main circuit of the double bidirectional DC-DC converter can be selectively connected with a feed control circuit and a charging control circuit.
As shown in FIG. 1, the main circuit of the double bidirectional DC-DC converter comprises a power supply, a load and a first filter capacitor C b A second filter capacitor C d First inductor L A Second inductance L B The switching circuit comprises a first switching tube circuit, a second switching tube circuit, a third switching tube circuit and a fourth switching tube circuit. First, second, third and fourth switching tube circuitsThe tube closing circuit is composed of IGBT, each IGBT switch tube is connected with a freewheel diode in anti-parallel. The upper bridge arm and the lower bridge arm of the switching tube circuit are complementarily conducted, a bridge arm A is formed by a first switching tube circuit and a second switching tube circuit, an IGBT emitter of the first switching tube circuit is connected with an IGBT collector of the second switching tube circuit, a bridge arm B is formed by a third switching tube circuit and a fourth switching tube circuit, an IGBT emitter of the third switching tube circuit is connected with an IGBT collector of the fourth switching tube circuit, and a first filter capacitor C is formed by the IGBT emitter of the third switching tube circuit and the IGBT collector of the fourth switching tube circuit b Connected in parallel with two ends of the power supply, a first inductance L A And a second inductance L B One end of the second filter capacitor C is connected with the positive electrode of the power supply, the other end is connected with the emitter electrodes of the first switch tube circuit and the second switch tube circuit respectively d Connected in parallel across the load.
As shown in fig. 2, the feed control circuit includes a voltage outer loop, a first current inner loop, a second current inner loop, a first RBF network, a second RBF network, a first PWM modulator, a second PWM modulator, a first PI regulator, a second PI regulator, a third PI regulator, a first clipping link, a second clipping link, a third clipping link, a first delay link, a second delay link, a first proportional link, a second proportional link, and a third proportional link; the RBF network structure comprises RBF supervision control and RBF network control; RBF supervisory control is used for constant voltage control, with RBF network inputs given by voltage outer loop operations. In the voltage outer ring, the end voltage U of the storage battery is collected b And it is connected with the reference voltage U r Comparing, namely sending the obtained difference value to a first PI regulator, and taking the current value which is equally divided by a first limiting link and a first proportional link (1/2) as a current reference value of a first current inner loop and a second current inner loop; in the first current inner loop, the first inductance L is collected and flown through A Is the current i of (2) LA Comparing the obtained difference with a constant current set value, comparing the current value calculated by a second proportion link and a first delay link with a current reference value of a first current inner loop, sending the obtained difference to a second PI regulator, feeding back the output value of the second PI regulator to the input end of a first RBF network, using the output value of the second PI regulator and the current reference value of the first current inner loop as the input end of the first RBF network together, controlling the output value of the first RBF network, summing the output value of the first PI regulator, and performing control on the output value of the first RBF networkThe second amplitude limiting link is followed by a first PWM modulator to form PWM A A control signal; in the second current inner loop, the current flowing through the second inductor L is collected B Is the current i of (2) LB Comparing the obtained difference value with a constant current set value, comparing the current value calculated by a third proportion link and a second delay link with a current reference value of a second current inner loop, sending the obtained difference value to a third PI regulator, feeding back the output value of the third PI regulator to the input end of a second RBF network, and taking the output value of the third PI regulator and the current reference value of the second current inner loop as the input end of the second RBF network together, summing the output values of the third PI regulator after being controlled by the second RBF network, and entering a second PWM modulator after being subjected to a third limiting link to form PWM B A control signal.
As shown in fig. 3, the charging control circuit includes a voltage outer loop, a first current inner loop, a second current inner loop, a first PWM modulation link, a second PWM modulator, a first PI regulator, a second PI regulator, a third PI regulator, a first clipping link, a second clipping link, a third clipping link, a first delay link, a second delay link, a first scaling link, a second scaling link, and a third scaling link. In the voltage outer ring, the end voltage U of the storage battery is collected b And it is connected with the reference voltage U r Comparing, namely sending the obtained difference value to a first PI regulator, and taking the current value which is equally divided by a first limiting link and a first proportional link (1/2) as a current reference value of a first current inner loop and a second current inner loop; in the first current inner loop, the first inductance L is collected and flown through A Is the current i of (2) LA Comparing the obtained difference value with a constant current set value, comparing the current value calculated by a second proportion link and a first delay link with a current reference value of a first current inner loop, sending the obtained difference value to a second PI regulator, and entering a first PWM modulator after passing through a second amplitude limiting link to form PWM A A control signal; in the second current inner loop, the current flowing through the second inductor L is collected B Is the current i of (2) LB Comparing the obtained difference value with a constant current set value, comparing the current value calculated by a third proportion link and a second delay link with a current reference value of a second current inner loop, sending the obtained difference value to a third PI regulator, and entering a second PWM (pulse-Width modulation) after a third amplitude limiting linkA controller for forming PWM B A control signal.
The feed control circuit and the charging control circuit are connected with the main circuit of the two-fold bidirectional DC-DC converter through the mode selection switch to control the bidirectional DC-DC converter.
Preferably, the RBF network adopts a 1-J-1 type structure, as shown in fig. 4, a single-node input layer transmits signals to an hidden layer, the central vector and the width vector of J units of the hidden layer are predetermined, and only the weight between the hidden layer and an output layer of the network is adjustable. The hidden layer performs a fixed nonlinear transformation that maps the input space to a hidden layer space containing J units where the output layer performs linear combinations.
Taking a storage battery energy storage system as an example, when the storage battery energy storage system is applied to the storage battery energy storage system, U b The battery terminal is the load is the direct current bus terminal, as shown in fig. 2. At this time, the converter mainly operates in two operation modes, namely, boost mode and Buck mode. When the converter works in the Boost mode, the converter is mainly used for providing energy for the direct current bus on the right side of the energy storage system so as to maintain the stability of the voltage of the direct current bus, and when the converter works in the Buck mode, the converter aims to feed back redundant energy on the direct current bus side to the storage battery to charge the storage battery, so that the aim of energy bidirectional flow is achieved.
An RBF network supervision method of a bidirectional DC-DC converter for a storage battery, the method comprising:
adopting a complementary conduction mode of an upper bridge arm and a lower bridge arm of a switching tube circuit; when the first switching tube and the third switching tube work, the circuit operates in a Buck mode, namely a charging state, and when the second switching tube and the fourth switching tube work, the circuit operates in a Boost mode, namely a feeding state.
When the feeding and charging working modes are switched, a composite controller is formed by an RBF network and a PI controller, the system is PI controlled in the initial stage, and when the system reaches a steady state, the system is integrated with the RBF network for supervision control. When a large error occurs in the control process, PI control plays a leading role, and the RBF network plays a regulating role.
RBF supervisory control is used for constant voltage control, with RBF network inputs given by voltage outer loop operations.
The RBF network controller serves as a feedforward controller and is used for fitting an inverse model of the controlled object to achieve the effect of counteracting the nonlinear property of the controlled object. The converter system obtains good stability under the conventional PI closed-loop control, and the RBF network improves the tracking performance of the system and reduces the steady-state error of the system through the compensation function of the nonlinear controlled object.
On the basis of keeping excellent control characteristics of a PI controller, a control strategy of monitoring the PID controller by an RBF network is adopted in the feed control circuit so as to realize the nonlinear regulation of the system, thereby avoiding the complexity of modeling and the influence caused by neglecting the nonlinear characteristics of battery load during modeling under normal conditions, improving the voltage and current ripple characteristics of the battery side of the converter, and further improving the charge and discharge quality of the battery.
The invention provides an improvement on the double closed-loop control technology of the traditional PI regulation by introducing RBF network control, realizes the compound control of a system, can effectively regulate the nonlinear characteristic of a storage battery, has good control performance, has good dynamic characteristics in the processes of battery charge-discharge, charge-discharge switching and constant-voltage constant-current switching, has very small current-voltage ripple and smooth waveform in a steady state, thereby improving the charge-discharge quality of the battery, prolonging the service life of the storage battery and having higher reliability.
While the invention has been described above by way of example, it will be apparent that the invention is not limited to the above embodiments, but is capable of numerous insubstantial modifications by the method concepts and technical solutions of the invention, or applications of the inventive concepts and technical solutions without modification to other applications, all within the scope of the invention. The protection scope of the present invention shall be subject to the protection scope defined by the claims.
Claims (6)
1. The RBF network supervision system of the bidirectional DC-DC converter for the storage battery is characterized by comprising a main circuit of the double bidirectional DC-DC converter, a feed control circuit and a charging control circuit; the main circuit of the double bidirectional DC-DC converter is selectively connected with the feed control circuit and the charging control circuit;
the feed control circuit comprises a voltage outer loop, a first current inner loop, a second current inner loop, a first RBF network, a second RBF network, a first PWM modulator, a second PWM modulator, a first PI regulator, a second PI regulator, a third PI regulator, a first amplitude limiting link, a second amplitude limiting link, a third amplitude limiting link, a first delay link, a second delay link, a first proportion link, a second proportion link and a third proportion link; the RBF network structure comprises RBF supervision control and RBF network control; the RBF supervision control is used for constant voltage control, and the input of the RBF network is given by voltage outer loop operation; in the voltage outer ring, collecting the end voltage Ub of the storage battery, comparing the end voltage Ub with a reference voltage Ur, and sending the obtained difference to a first PI regulator, wherein the current value obtained by equally dividing the end voltage Ub through a first limiting link and a first proportional link (1/2) is used as a current reference value of a first current inner ring and a second current inner ring; collecting current iLA flowing through a first inductor LA in a first current inner loop, comparing the current value of the obtained difference value with a constant current given value, comparing the current value calculated by a second proportion link and a first delay link with a current reference value of the first current inner loop, sending the obtained difference value to a second PI regulator, feeding back an output value of the second PI regulator to an input end of a first RBF network, using the output value of the second PI regulator and the current reference value of the first current inner loop as an input end of the first RBF network together, summing the output value of the second PI regulator after being controlled by the first RBF network, and sending the obtained difference value into a first PWM modulator after being subjected to a second limiting link to form a PWMA control signal; in the second current inner loop, collecting current iLB flowing through a second inductor LB, comparing the current value with a constant current set value, comparing the obtained difference value with a current reference value of the second current inner loop through a third proportion link and a second delay link, sending the obtained difference value to a third PI regulator, feeding back an output value of the third PI regulator to an input end of a second RBF network, taking the output value of the third PI regulator and the current reference value of the second current inner loop as an input end of the second RBF network together, summing the output values of the third PI regulator after being controlled by the second RBF network, and sending the obtained difference value into a second PWM modulator after a third limiting link to form a PWMB control signal;
the charging control circuit comprises a voltage outer ring, a first current inner ring, a second current inner ring, a first PWM (pulse-width modulation) modulator, a second PWM modulator, a first PI regulator, a second PI regulator, a third PI regulator, a first amplitude limiting link, a second amplitude limiting link, a third amplitude limiting link, a first delay link, a second delay link, a first proportion link, a second proportion link and a third proportion link; in the voltage outer ring, collecting the end voltage Ub of the storage battery, comparing the end voltage Ub with a reference voltage Ur, and sending the obtained difference to a first PI regulator, wherein the current value obtained by equally dividing the end voltage Ub through a first limiting link and a first proportional link (1/2) is used as a current reference value of a first current inner ring and a second current inner ring; in the first current inner loop, collecting current iLA flowing through a first inductor LA, comparing the current value with a constant current given value, comparing the obtained current value calculated by a second proportion link and a first delay link with a current reference value of the first current inner loop, sending the obtained difference to a second PI regulator, and entering a first PWM (pulse-Width modulation) regulator after passing through a second amplitude limiting link to form a PWMA control signal; in the second current inner loop, collecting current iLB flowing through a second inductor LB, comparing the current value with a constant current given value, comparing the obtained current value calculated by a third proportion link and a second delay link with a current reference value of the second current inner loop, sending the obtained difference to a third PI regulator, and entering a second PWM modulator after passing through a third amplitude limiting link to form a PWMB control signal;
the feed control circuit and the charging control circuit are connected with the main circuit of the two-fold bidirectional DC-DC converter through the mode selection switch to control the bidirectional DC-DC converter.
2. The RBF network supervision system of a bidirectional DC-DC converter for a battery according to claim 1, wherein the main circuit of the bidirectional DC-DC converter includes a power source, a load, a first filter capacitor Cb, a second filter capacitor Cd, a first inductor LA, a second inductor LB, a first switching tube circuit, a second switching tube circuit, a third switching tube circuit, and a fourth switching tube circuit; the first switching tube circuit, the second switching tube circuit, the third switching tube circuit and the fourth switching tube circuit are formed by IGBT; the upper bridge arm and the lower bridge arm of the switching tube circuit are complementarily conducted, a bridge arm A is formed by a first switching tube circuit and a second switching tube circuit, an IGBT emitter of the first switching tube circuit is connected with an IGBT collector of the second switching tube circuit, a bridge arm B is formed by a third switching tube circuit and a fourth switching tube circuit, an IGBT emitter of the third switching tube circuit is connected with an IGBT collector of the fourth switching tube circuit, a first filter capacitor Cb is connected at two ends of a power supply in parallel, one ends of a first inductor LA and a second inductor LB are connected at a positive electrode of the power supply, the other ends of the first inductor LA and the second inductor LB are connected with an emitter of the first switching tube circuit and an emitter of the second switching tube circuit respectively, and a second filter capacitor Cd is connected at two ends of a load in parallel.
3. The RBF network monitoring system of a bi-directional DC-DC converter for a battery as recited in claim 2, wherein each of said IGBT switching tubes is connected in anti-parallel with a freewheeling diode.
4. The RBF network monitoring system of a bi-directional DC-DC converter for a battery as recited in claim 1, wherein the feed control circuit and the charge control circuit are connected to the main circuit of the bi-directional DC-DC converter through a mode-selecting switch to control the bi-directional DC-DC converter.
5. The RBF network supervision system of a bidirectional DC-DC converter for a storage battery according to claim 1, wherein the RBF network structure adopts a 1-J-1 type structure, a single-node input layer transmits signals to an hidden layer, central vectors and width vectors of J units of the hidden layer are predetermined, and only weights between the hidden layer and an output layer of the network are adjustable; the hidden layer performs a fixed nonlinear transformation that maps the input space to a hidden layer space containing J units where the output layer performs linear combination.
6. A method of RBF network supervision of a bi-directional DC-DC converter for a battery, the method being applied to the system of any of claims 1 to 5, the method comprising:
adopting a complementary conduction mode of an upper bridge arm and a lower bridge arm of a switching tube circuit; when the first switching tube and the third switching tube work, the circuit operates in a Buck mode, namely a charging state, and when the second switching tube and the fourth switching tube work, the circuit operates in a Boost mode, namely a feeding state;
when the feeding and charging working modes are switched, a composite controller is formed by an RBF network and a PI controller, the RBF neural network control is utilized to optimize a double closed-loop system for traditional PI regulation, the system is PI control in the initial stage, and the RBF network supervision control is incorporated when the system reaches a steady state; when a large error occurs in the control process, PI control plays a leading role, and the RBF network plays a regulating role.
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| CN105207333A (en) * | 2015-10-13 | 2015-12-30 | 中国船舶重工集团公司第七一二研究所 | Phase-shift multiplex charge and discharge equipment |
| CN107332265A (en) * | 2017-05-12 | 2017-11-07 | 辽宁工程技术大学 | Two way convertor efficiency optimization control method in micro-grid energy storage system |
| CN208078900U (en) * | 2018-03-28 | 2018-11-09 | 安徽工程大学 | A kind of RBF network monitoring systems of accumulator bidirectional DC-DC converter |
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