CN107888073B - Alternating current-direct current hybrid energy router of all-round soft switch - Google Patents

Alternating current-direct current hybrid energy router of all-round soft switch Download PDF

Info

Publication number
CN107888073B
CN107888073B CN201711129877.0A CN201711129877A CN107888073B CN 107888073 B CN107888073 B CN 107888073B CN 201711129877 A CN201711129877 A CN 201711129877A CN 107888073 B CN107888073 B CN 107888073B
Authority
CN
China
Prior art keywords
unit
voltage
bridge
current
double
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.)
Active
Application number
CN201711129877.0A
Other languages
Chinese (zh)
Other versions
CN107888073A (en
Inventor
张钊
董天阳
邵宝珠
王刚
孙秋野
孙峰
张涛
戈阳阳
李胜辉
张潇桐
董鹤楠
张冠峰
白雪
张雪猛
程科
于双江
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Corp of China SGCC
Northeastern University China
Original Assignee
State Grid Corp of China SGCC
Northeastern University China
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by State Grid Corp of China SGCC, Northeastern University China filed Critical State Grid Corp of China SGCC
Priority to CN201711129877.0A priority Critical patent/CN107888073B/en
Publication of CN107888073A publication Critical patent/CN107888073A/en
Application granted granted Critical
Publication of CN107888073B publication Critical patent/CN107888073B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M3/00Conversion of dc power input into dc power output
    • H02M3/22Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33569Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
    • H02M3/33576Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/02Circuit arrangements for ac mains or ac distribution networks using a single network for simultaneous distribution of power at different frequencies; using a single network for simultaneous distribution of ac power and of dc power
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28Arrangements for balancing of the load in a network by storage of energy
    • H02J3/32Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M3/00Conversion of dc power input into dc power output
    • H02M3/02Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10Conversion 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
    • H02M3/145Conversion 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
    • H02M3/155Conversion 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
    • H02M3/156Conversion 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 with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/158Conversion 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 with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
    • H02M3/1582Buck-boost converters
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M3/00Conversion of dc power input into dc power output
    • H02M3/02Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10Conversion 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
    • H02M3/145Conversion 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
    • H02M3/155Conversion 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
    • H02M3/156Conversion 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 with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/158Conversion 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 with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
    • H02M3/1584Conversion 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 with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M1/00Details of apparatus for conversion
    • H02M1/0048Circuits or arrangements for reducing losses
    • H02M1/0054Transistor switching losses
    • H02M1/0058Transistor switching losses by employing soft switching techniques, i.e. commutation of transistors when applied voltage is zero or when current flow is zero
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy
    • Y02E10/56Power conversion systems, e.g. maximum power point trackers
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E70/00Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30Systems combining energy storage with energy generation of non-fossil origin

Abstract

The alternating current-direct current hybrid energy router comprises a three-phase bidirectional rectifying unit, a double-active full-bridge conversion unit, an omnidirectional zero-voltage soft switching unit, a staggered parallel Boost unit, a four-switch Buck-Boost unit, a single-phase full-bridge bidirectional inversion unit, a high-voltage direct current bus, a low-voltage direct current bus, a Hall current sampling unit, a voltage sampling unit, a DSP control board, a driving circuit and an auxiliary power supply. The all-dimensional zero-voltage soft switching unit applied to the double-active full-bridge converter in the device has 7 modes in one period, and the switching loss of the double-active full-bridge converter is greatly reduced. Neotype structure has promoted the SST to the support of distribution network and has improved the ability of electric energy quality, takes out direct current generating line and makes during direct current load, energy memory, photovoltaic equipment etc. can insert local energy internet, realize regional distributed device and the power interchange between the distribution network, has solved the new forms of energy simultaneously and has consumed the problem on the spot, has laid the hardware basis for the optimization of electric power economy.

Description

Alternating current-direct current hybrid energy router of all-round soft switch
Technical Field
The invention belongs to the field of energy Internet and the technical field of power electronic electric energy conversion, and particularly relates to an all-dimensional soft-switching alternating-current and direct-current hybrid energy router device.
Background
With the increasing complexity of the network structure of the interconnected system and the increasing system capacity, the optimized configuration among large areas and multiple energy sources can be realized to realize better economy, and meanwhile, potential safety hazards are brought to the safe operation of a power grid. Secondly, with the continuous improvement of the permeability of new energy in a power grid, novel energy equipment such as photovoltaic power generation and wind power generation has the characteristics of wide distribution, small capacity, instability, mixed AC and DC sources and the like. The power electronic equipment is integrated into the power system in the parts of power generation, power transmission, power distribution, power utilization and the like, and the power system with power electronics becomes the development trend of the future power system. The solid-state transformer has two characteristics of high frequency and power electronization, and has the advantages of small size, small mass, strong controllability and the like, so that the solid-state transformer becomes one of important devices which cannot be ignored in a future power system.
The current conversion device taking the solid-state transformer as the core has large energy loss in the process of electric energy conversion due to simple topology, and cannot meet the requirements of high efficiency, high power density and low loss of the current energy router; the traditional solid-state transformer is single in control method and only considered from the perspective of grid connection, and the access of renewable energy sources such as photovoltaic power generation and wind power generation brings new challenges to the normal operation of a power grid, and the traditional solid-state transformer cannot be well competent.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an alternating current-direct current hybrid energy router device with an omnibearing soft switch, namely, the omnibearing soft switch device is added in a double-active full-bridge converter module, and the zero-voltage turn-on and turn-off of a switch tube in the energy conversion process are realized.
The technical scheme of the invention is as follows:
the alternating current-direct current hybrid energy router device comprises a three-phase bidirectional rectifying unit, a double-active full-bridge conversion unit, an omnidirectional zero-voltage soft switching unit, a staggered parallel Boost unit, a four-switch Buck-Boost unit, a single-phase full-bridge bidirectional inversion unit, a high-voltage direct current bus, a low-voltage direct current bus, a Hall current sampling unit, a voltage sampling unit, a DSP control board, a driving circuit and an auxiliary power supply.
The input end of the three-phase bidirectional rectifying unit is connected with a 10KV power distribution network, the output end of the three-phase bidirectional rectifying unit is connected with a high-voltage direct-current bus, the double-active full-bridge conversion unit is connected with the high-voltage direct-current bus, the omnibearing zero-voltage soft switching unit acts on the double-active full-bridge conversion unit, the output ends of the double-active full-bridge conversion unit are respectively connected with a 400V low-voltage direct-current bus, the input end of the single-phase full-bridge bidirectional inversion unit is connected with the 400V low-voltage direct-current bus, the output ends of the staggered parallel Boost unit and the four-switch Buck-Boost unit are respectively connected with the 400V low-voltage direct-current bus, the distributed;
the DSP control board is connected with the double-active full-bridge conversion unit, the staggered parallel Boost unit, the four-switch Buck-Boost unit and the single-phase full-bridge bidirectional inversion unit through the driving circuit; the double-active full-bridge conversion unit is connected with the high-voltage direct-current bus and the low-voltage direct-current bus, the high-voltage direct-current bus and the low-voltage direct-current bus are connected to the DSP control panel through the sampling circuit, and the auxiliary power supply is connected with the drive circuit, the DSP control panel and the sampling circuit.
The three-phase bidirectional rectifying unit, the double-active full-bridge conversion unit, the omnibearing zero-voltage soft switching unit, the four-switch Buck-Boost unit and the single-phase full-bridge bidirectional inversion unit respectively have three energy flow working modes of forward conduction, reverse conduction and non-conduction, wherein the energy flows from the input end to the output end and is forward conduction, the energy flows from the output end to the input end and is reverse conduction, no energy flows through and is non-conduction, and different working modes of the energy router device applied to the energy internet are formed according to different energy flow working modes of each unit.
The omnibearing zero-voltage soft-switching double-active full-bridge conversion unit comprises a high-frequency inversion module, a high-frequency transformer module, a rectification output module and a soft-switching module, wherein the working modes of the omnibearing zero-voltage soft-switching double-active full-bridge conversion unit are 14, and the working modes are respectively 7 in forward and reverse directions and are the same;
mode 1: in this mode, energy is transferred to the load side, and the primary current of the high frequency transformer flows through the switch S1 and the inductor LlkA high-frequency transformer and inductor Lm, a switch S4, and finally flowing into the ground; secondary side current of high frequency transformer flows through switchSwitch-off S5 resonant switch Q1 inductor L0Load, diode S6 eventually flows into ground;
mode 2; in this mode, energy is transferred to the load side, and the primary current of the high frequency transformer flows through the switch S1 and the inductor LlkA high-frequency transformer and inductor Lm, a switch S4, and finally flowing into the ground; the secondary current of the high-frequency transformer flows through a switching tube S5, a capacitor C and a capacitor C of a Q1 in a resonant soft switching unit, a diode D6 and an inductor L0Load, diode S6 eventually flows into ground
Modality 3: in this mode, energy is transferred to the load side, and the primary current of the high frequency transformer flows through the switch S1 and the inductor LlkA high-frequency transformer and inductor Lm, a switch S4, and finally flowing into the ground; the secondary current of the high-frequency transformer flows through the switch tube S5, the capacitor C, the diodes D5, D6 and the inductor L0Load, diode S6 eventually flows into ground
Modality 4: in this mode, only a small magnetizing current flows through the switch tube S1, and the inductance LlkInductance LmThe switching tube S4 and the primary side of the high-frequency transformer, thereby realizing zero-current switching of the main switch; on the secondary side of the high-frequency transformer, diodes D5, D6 and an inductor L0 form a closed loop;
mode 5: in this mode, the switching tubes S1 and S4 on the primary side of the high-frequency transformer are turned off, the magnetizing current flows through the capacitors S1 and S4, and a loop is formed by the diodes and the capacitors of the inductor Llk, the inductor Lm, the switching tubes S2 and S3; the secondary side of the high-frequency transformer, diodes D5, D6 and an inductor L0 form a closed loop;
modality 6: in this mode, the primary switching tubes S2 and S3 of the high-frequency transformer are turned on, and current flows through the inductor Lik and the inductor Lm; on the secondary side of the high-frequency transformer, current flows through a switching tube Q1, an inductor L0, a capacitor C0, a diode D5 and the capacitor C to form a closed loop;
modality 7: in this mode, the primary switches S2 and S3 of the high-frequency transformer are turned on, and the current flows through the inductor Llk, the inductor Lm and the high-frequency transformer; when the switching tubes S6 and S7 and the switching tube Q1 on the secondary side of the high-frequency transformer are opened, current flows through the capacitor C and the diode D5 simultaneously.
According to the control method of the omnibearing zero-voltage soft-switching double-active full-bridge converter unit, the three-phase bidirectional rectifying unit is used for realizing mutual power conversion between a 10KV power distribution network and high-voltage direct current and realizing that the three-phase bidirectional rectifying unit works in a rectifying working mode or an inverting working mode; the double-active full-bridge conversion unit is used for realizing mutual power conversion between high-voltage direct current and low-voltage direct current and realizing that the double-active full-bridge conversion unit works in a boosting working mode or a voltage reduction working mode; the all-dimensional zero-voltage soft switching unit is used for realizing the staggered parallel Boost unit in the soft switching process of the double-active full-bridge unit in the power conversion process between the high-voltage direct current and the low-voltage direct current, solving the problem of a photovoltaic grid-connected access interface and realizing the MPPT tracking of a photovoltaic cell; the four-switch Buck-Boost is used for providing an interface for energy storage equipment, has the functions of charge-discharge control and power quality management, and realizes omnibearing soft switching; the single-phase full-bridge bidirectional inversion unit is used for realizing the interconversion between low-voltage direct current and 220V and 50HZ alternating current voltages and realizing the working in a rectification working mode or an inversion working mode; the high-voltage direct-current bus is used for stabilizing the output voltage of the three-phase bidirectional rectifying unit and the input voltage of the double-active full-bridge conversion unit; the low-voltage direct-current bus comprises: the control circuit is used for interleaving the output voltage of the parallel Boost unit, the input voltage of the Buck-Boost unit and the input voltage of the single-phase full-bridge bidirectional inverter unit.
The control method comprises the following steps:
step 1: initializing an omnibearing zero-voltage soft switch double-active full-bridge converter unit, and pre-charging a high-voltage direct-current bus equivalent capacitor and a low-voltage direct-current bus equivalent capacitor;
step 2: the sampling circuit collects a voltage signal of the high-voltage direct-current bus and a voltage signal of the low-voltage direct-current bus and transmits the voltage signals to the DSP;
and step 3: the DSP calculates active power and reactive power flowing through a high-voltage direct-current bus and a low-voltage direct-current bus in real time, judges the energy flowing direction of the omnibearing zero-voltage soft-switching double-active full-bridge converter unit, outputs a PWM signal to a driving circuit, if energy flows from the input end to the output end of the omnibearing zero-voltage soft-switching double-active full-bridge converter unit, the energy is in a voltage-reducing working mode, step 4 is executed, if the output end of the energy omnibearing zero-voltage soft-switching double-active full-bridge converter unit flows to the input end, the energy is in a voltage-increasing working mode, step 5 is executed, otherwise, if no energy flows through the omnibearing zero-voltage soft-switching double-active full-bridge;
and 4, step 4: the omnibearing zero-voltage soft-switching double-active full-bridge converter unit works in a voltage reduction working mode, a high-frequency inversion module of the omnibearing zero-voltage soft-switching double-active full-bridge converter unit works according to different working modes, and a rectification output module is in a natural rectification state;
and 5: the all-round zero voltage soft switch double-active full-bridge converter unit works in a boosting working mode, the rectification output module of the all-round zero voltage soft switch double-active full-bridge converter unit works according to different working modes, and the high-frequency inversion module is in a natural rectification state.
The invention has the advantages that:
the alternating current-direct current hybrid energy router with the omnibearing soft switch can meet the requirement of low switching loss of the energy router in the electric energy conversion process, so that the advantages of high efficiency and high power density are achieved. Structurally, the novel solid-state transformer of modular design is easily expanded more, can provide single phase alternating current interface and three-phase alternating current interface respectively at low pressure interchange side interface simultaneously to the unbalanced three phase problem that the unbalanced load brought has been avoided. Meanwhile, a droop control method can be adopted at the low-voltage direct-current bus to realize self-adaptive power distribution of each device in the energy router. The all-dimensional zero-voltage soft switching unit applied to the double-active full-bridge converter in the device has 7 modes in one period, and the switching loss of the double-active full-bridge converter is greatly reduced. Neotype structure has promoted the SST to the support of distribution network and has improved the ability of electric energy quality, takes out direct current generating line and makes during direct current load, energy memory, photovoltaic equipment etc. can insert local energy internet, realize regional distributed device and the power interchange between the distribution network, has solved the new forms of energy simultaneously and has consumed the problem on the spot, has laid the hardware basis for the optimization of electric power economy.
Drawings
Fig. 1 is a block diagram of an overall apparatus of an energy router according to an embodiment of the present invention;
FIG. 2 is a schematic circuit diagram of an overall arrangement of an energy router according to an embodiment of the present invention;
FIG. 3 is an energy flow diagram of an embodiment of the present invention
FIG. 4 is a schematic circuit diagram of a three-phase bi-directional rectification unit in accordance with an embodiment of the present invention;
fig. 5 is a schematic circuit diagram of a dual active full bridge cell according to an embodiment of the present invention;
FIG. 6 is a schematic circuit diagram of interleaved parallel Boost units according to an embodiment of the present invention;
fig. 7 is a schematic circuit diagram of a four-switch Buck-Boost conversion unit according to an embodiment of the present invention;
FIG. 8 is a schematic circuit diagram of a single-phase full-bridge bidirectional inverter unit according to an embodiment of the present invention;
FIG. 9 is a control flow chart of an embodiment of the present invention
FIG. 10 is a modal diagram of the omnibearing zero-voltage soft-switching dual-active full-bridge converter unit of the present invention
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings.
An omnibearing soft-switching alternating-current and direct-current hybrid energy router device is shown in figure 1 and comprises a three-phase bidirectional rectifying unit, a double-active full-bridge conversion unit, an omnibearing zero-voltage soft switching unit, a staggered parallel Boost unit, a four-switch Buck-Boost unit, a single-phase full-bridge bidirectional inverter unit, a high-voltage direct-current bus and a low-voltage direct-current bus.
As shown in fig. 9, the router further includes a hall current sampling, a voltage sampling, a DSP control board, a driving circuit, and an auxiliary power supply;
the input end of a three-phase bidirectional rectifying unit is connected with a 10KV power distribution network, the output end of the three-phase bidirectional rectifying unit is connected with a high-voltage direct-current bus, a double-active full-bridge conversion unit is connected with the high-voltage direct-current bus, an omnibearing zero-voltage soft switching unit acts on the double-active full-bridge conversion unit, the output ends of the double-active full-bridge conversion unit are respectively connected with a 400V low-voltage direct-current bus, the input end of a single-phase full-bridge bidirectional inversion unit is connected with the 400V low-voltage direct-current bus, the output ends of a staggered parallel Boost unit and a four-switch Buck-Boost unit are respectively connected to the 400V low-voltage direct-current bus, distributed generating equipment;
the DSP control board is connected with the double-active full-bridge conversion unit, the staggered parallel Boost unit, the four-switch Buck-Boost unit and the single-phase full-bridge bidirectional inversion unit through the driving circuit; the double-active full-bridge conversion unit is connected with the high-voltage direct-current bus and the low-voltage direct-current bus, the high-voltage direct-current bus and the low-voltage direct-current bus are connected to the DSP control panel through the sampling circuit, and the auxiliary power supply is connected with the drive circuit, the DSP control panel and the sampling circuit.
The high-voltage direct-current bus is adjustable high-voltage direct-current voltage, and in the embodiment, the high-voltage direct-current bus is about 18 KV.
The low-voltage direct-current bus is adjustable low-voltage direct current, about 400V to 600V, and in the embodiment, the low-voltage direct-current bus is 400V.
As shown in fig. 2, the input interface voltage of the three-phase bidirectional rectifying unit is 10KV and 50HZ alternating current, the output interface voltage is adjustable high-voltage direct current voltage of about 18KV, the output interface voltage of the omnibearing soft-switching dual-active converter unit is adjustable low-voltage direct current, 600V-800V, the input interface of the four-switch Buck-Boost unit is connected with energy storage or direct current load, the output interface is connected with the low-voltage direct current bus, the input interface of the interleaved parallel Boost unit is connected with other distributed generation energy such as photovoltaic and wind energy, the output interface is connected with the low-voltage direct current bus, and the output interface of the single-phase bidirectional full-bridge inverting unit is power frequency 50HZ and 220V alternating current;
five unit energy flow modes in the all-round soft switch router device, as shown in fig. 3, the two-way rectification unit of three-phase, two active full-bridge transform unit, the parallelly connected Boost unit of selfing mistake, four switch Buck-Boost unit and the two-way contravariant unit of single-phase full-bridge all have forward conduction, three kinds of energy flow mode of reverse conduction and non-conduction, wherein, energy is for forward conduction from input flow direction output, energy is for reverse conduction from output flow direction input, no energy flows through for non-conduction, energy flow mode according to each unit is different, specifically as follows:
the three-phase bidirectional rectifying unit and the double-active full-bridge conversion unit are in forward conduction, and the system is in a state of inputting energy from a power distribution network, and the mode a1 is in a state of interleaving parallel connection of Boost units, a single-phase full-bridge bidirectional inverter unit and a Buck-Boost unit and is in a forward conduction state;
the mode a2 is characterized in that the Boost units connected in parallel in a staggered mode and the single-phase full-bridge bidirectional inverter unit are in a forward conduction state, and the Buck-Boost unit is in a reverse conduction state;
the mode a3 is characterized in that the Boost units and the Buck-Boost units which are connected in parallel in a staggered mode are in a forward conduction state, and the single-phase full-bridge bidirectional inverter unit is in a reverse conduction state;
the mode a4 is characterized in that the interleaved parallel Boost units are in a forward conduction state, and the Buck-Boost units and the single-phase full-bridge bidirectional inverter units are in a reverse conduction state;
the mode a5 is characterized in that the interleaved parallel Boost units are in a forward conduction state, the Buck-Boost units are in a reverse conduction state, and the single-phase full-bridge bidirectional inverter units are in a forward conduction state;
the mode a6 is characterized in that the interleaved parallel Boost units are in a non-conducting state, and the Buck-Boost units and the single-phase full-bridge bidirectional inverter units are in a forward conducting state;
the mode a7 is characterized in that the interleaved parallel Boost units are in a non-conducting state, the Buck-Boost units are in a forward conducting state, and the single-phase full-bridge bidirectional inverter units are in a reverse conducting state;
the mode a8 is characterized in that the interleaved parallel Boost units are in a non-conducting state, and the Buck-Boost units and the single-phase full-bridge bidirectional inverter units are in a reverse conducting state;
the mode a9 is characterized in that the interleaved parallel Boost units are in a non-conducting state, the Buck-Boost units are in a reverse conducting state, and the single-phase full-bridge bidirectional inverter units are in a forward conducting state;
and in the mode b, the three-phase bidirectional rectifying unit and the double-active full-bridge conversion unit are not conducted, and the system is in a micro-grid island state.
The mode b1 is characterized in that the Boost unit, the single-phase full-bridge bidirectional inverter unit and the Buck-Boost unit are connected in a staggered and parallel mode and are in a forward conduction state;
the mode b2 is characterized in that the Boost units connected in parallel in a staggered mode and the single-phase full-bridge bidirectional inverter unit are in a forward conduction state, and the Buck-Boost unit is in a reverse conduction state;
the mode b3 is characterized in that the Boost units and the Buck-Boost units are connected in parallel in a staggered mode and are in a forward conduction state, and the single-phase full-bridge bidirectional inverter unit is in a reverse conduction state;
the mode b4 is characterized in that the interleaved parallel Boost units are in a forward conduction state, and the Buck-Boost units and the single-phase full-bridge bidirectional inverter units are in a reverse conduction state;
the mode b5 is characterized in that the interleaved parallel Boost units are in a forward conduction state, the Buck-Boost units are in a reverse conduction state, and the single-phase full-bridge bidirectional inverter units are in a forward conduction state;
the mode b6 is characterized in that the interleaved parallel Boost units are in a non-conducting state, and the Buck-Boost units and the single-phase full-bridge bidirectional inverter units are in a forward conducting state;
the mode b7 is characterized in that the interleaved parallel Boost units are in a non-conducting state, the Buck-Boost units are in a forward conducting state, and the single-phase full-bridge bidirectional inverter units are in a reverse conducting state;
the mode b8 is characterized in that the interleaved parallel Boost units are in a non-conducting state, and the Buck-Boost units and the single-phase full-bridge bidirectional inverter units are in a reverse conducting state;
the mode b9 is characterized in that the interleaved parallel Boost units are in a non-conducting state, the Buck-Boost units are in a reverse conducting state, and the single-phase full-bridge bidirectional inverter units are in a forward conducting state;
the three-phase bidirectional rectifying unit and the double-active full-bridge conversion unit are conducted reversely in the mode c, and the system is in a state of outputting energy to a power distribution network in the mode c1, the Boost unit, the single-phase full-bridge bidirectional inverter unit and the Buck-Boost unit are connected in a staggered and parallel mode and are in a forward conducting state;
the mode c2 is that the Boost unit and the single-phase full-bridge bidirectional inverter unit are connected in parallel in a staggered mode and are in a forward conduction state, and the Buck-Boost unit is in a reverse conduction state;
the mode c3 is characterized in that the Boost units and the Buck-Boost units are connected in parallel in a staggered mode and are in a forward conduction state, and the single-phase full-bridge bidirectional inverter unit is in a reverse conduction state;
the mode c4 is characterized in that the interleaved parallel Boost units are in a forward conduction state, and the Buck-Boost units and the single-phase full-bridge bidirectional inverter units are in a reverse conduction state;
the mode c5 is characterized in that the interleaved parallel Boost units are in a forward conduction state, the Buck-Boost units are in a reverse conduction state, and the single-phase full-bridge bidirectional inverter units are in a forward conduction state;
the mode c6 is characterized in that the interleaved parallel Boost units are in a non-conducting state, and the Buck-Boost units and the single-phase full-bridge bidirectional inverter units are in a forward conducting state;
the mode c7 is characterized in that the interleaved parallel Boost units are in a non-conducting state, the Buck-Boost units are in a forward conducting state, and the single-phase full-bridge bidirectional inverter units are in a reverse conducting state;
the mode c8 is characterized in that the interleaved parallel Boost units are in a non-conducting state, and the Buck-Boost units and the single-phase full-bridge bidirectional inverter units are in a reverse conducting state;
the mode c9 is characterized in that the interleaved parallel Boost units are in a non-conducting state, the Buck-Boost units are in a reverse conducting state, and the single-phase full-bridge bidirectional inverter units are in a forward conducting state;
fig. 4 is a schematic diagram of a three-phase PWM bidirectional rectifying unit circuit of an omni-directional soft-switching ac/dc hybrid energy router device;
the connection mode of the main circuit module is as follows: the collector electrodes of the 1 st, 3 rd and 5 th insulated gate bipolar transistors are connected with the positive electrode of the high-voltage direct-current bus; the emitter electrode of the 2 nd, 4 th and 6 th insulated gate bipolar transistor is connected with the negative electrode of the high-voltage direct-current bus; the emitter of the 1 st insulated gate bipolar transistor is connected with the collector of the 2 nd insulated gate bipolar transistor, and the emitter of the 3 rd insulated gate bipolar transistor is connected with the collector of the 4 th insulated gate bipolar transistor;
the 1 st inlet wire of the power distribution network is connected to an emitter electrode of the 1 st insulated gate bipolar transistor, the 2 nd inlet wire of the power distribution network is connected to an emitter electrode of the 3 rd insulated gate bipolar transistor, and the 3 rd inlet wire of the power distribution network is connected to an emitter electrode of the 5 th insulated gate bipolar transistor.
Fig. 5 is a schematic diagram of a circuit of a dual-active full-bridge converter unit and an omni-directional soft switching unit of an omni-directional soft-switching ac/dc hybrid energy router device;
connection mode of the double-active full-bridge DC-DC unit: the double-active full-bridge conversion unit comprises 8 insulated gate bipolar transistors (IGBT power tubes) and a high-frequency transformer; the high-frequency inverter module, the high-frequency transformer module and the rectification output module are divided; the high-frequency inversion module comprises 2 bridge arms (bridge arms, wherein a collector electrode of an upper switch tube is connected with the positive electrode of the high-voltage direct-current bus, an emitter electrode of an upper insulated gate bipolar transistor is connected with a collector electrode of a lower insulated gate bipolar transistor, and an emitter electrode of the lower insulated gate bipolar transistor is connected with the negative electrode of the high-voltage direct-current bus); the collector electrode of the 12 th and 14 th insulated gate bipolar transistors is connected with the positive electrode of the high-voltage direct-current bus, and the emitter electrode of the 13 th and 15 th insulated gate bipolar transistors is connected with the negative electrode of the high-voltage direct-current bus; the emitter of the 12 th insulated gate bipolar transistor is connected to the collector of the 13 th insulated gate bipolar transistor; the emitter of the 14 th insulated gate bipolar transistor is connected to the collector of the 15 th insulated gate bipolar transistor;
the connection mode of the omnibearing soft switch unit is as follows: the omnibearing soft switch unit comprises an insulated gate bipolar transistor (IGBT power tube), a capacitor and two diodes; the emitter of the 16 th insulated gate bipolar transistor is connected with the cathode of the 1 st diode, the anode of the 1 st diode is connected with the anode of the 2 nd diode, one end of the capacitor is connected with the collector of the 16 th insulated gate bipolar transistor, and the other end of the capacitor is connected with the anode of the 1 st diode;
FIG. 6 is a schematic circuit diagram of the interleaved boost units of an AC/DC hybrid energy router device with omni-directional soft switching
The connection mode of the staggered parallel boost units is as follows: the staggered parallel boost unit comprises two inductors, two diodes and two insulated gate bipolar transistors; one ends of the two inductors are connected to the anode of the distributed power supply together, the other ends of the two inductors are connected to the collectors of the 17 th and 18 th insulated gate bipolar transistors respectively, the anodes of the two diodes are connected to the collectors of the 17 th and 18 th insulated gate bipolar transistors respectively, and the emitters of the 17 th and 18 th insulated gate bipolar transistors are connected to the cathode of the distributed power supply;
FIG. 7 is a schematic circuit diagram of a four-switch Buck-Boost unit of an omni-directional soft-switching AC/DC hybrid energy router device
The connection mode of the four-switch Buck-Boost unit is as follows: the four-switch Buck-Boost unit comprises four insulated gate bipolar transistors, an inductor and two capacitors; the two capacitors are respectively connected to the two input and output ends, the emitter electrode of the 19 th insulated gate bipolar transistor is connected with an inductor, the inductor is connected with the collector electrode of the 20 th insulated gate bipolar transistor, and the 21 st and 22 nd insulated gate bipolar transistors are connected in parallel in the circuit;
FIG. 8 is a schematic diagram of a single-phase full-bridge bidirectional inverter of an AC/DC hybrid energy router with omni-directional soft switching
The connection mode of the main circuit module is as follows: the collectors of the 23 rd and 25 th insulated gate bipolar transistors are connected to the positive electrode of the low-voltage direct current bus; the emitter of the 24 th and 26 th insulated gate bipolar transistors is connected to the negative electrode of the low-voltage direct-current bus, the emitter of the 23 th insulated gate bipolar transistor is connected to the collector of the 24 th insulated gate bipolar transistor, and the emitter of the 25 th insulated gate bipolar transistor is connected to the collector of the 26 th insulated gate bipolar transistor; the output end of the single-phase full-bridge bidirectional inverter is connected with the L filter;
a control circuit of an omni-directional soft-switching ac/dc hybrid energy router device, as shown in fig. 9, includes a DSP, a driving circuit, a power circuit, and a sampling circuit. In this embodiment, the model number of the DSP is TMS320F 28335.
The input end of the sampling circuit is respectively connected with an 18KV high-voltage direct-current bus and a 400V low-voltage direct-current bus, the output end of the sampling circuit is connected with the input end of the TMS320F28335, the output end of the TMS320F28335 is connected with the input end of the driving circuit, the output end of the driving circuit is respectively connected with the three-phase bidirectional rectifying unit, the double-active full-bridge converting unit, the staggered parallel Boost unit, the single-phase full-bridge bidirectional inverter unit and the four-switch Buck-Boost unit, and the power circuit is respectively connected with the DSP, the driving circuit.
TMS320F28335 for generating a PWM signal for driving an insulated gate bipolar transistor.
And the driving circuit is used for amplifying the PWM signal generated by the DSP and controlling the on-off of the insulated gate bipolar transistors of the three-phase bidirectional rectifying unit, the double-active full-bridge conversion unit, the omnibearing zero-voltage soft switching unit, the staggered parallel Boost unit, the Buck-Boost unit and the single-phase full-bridge bidirectional inversion unit.
And the power supply circuit is used for providing electric energy for the DSP, the sampling circuit and the driving circuit.
An omni-directional zero-voltage soft-switching dual-active full-bridge converter unit mode diagram is shown in fig. 10.
Mode 1: in this mode, energy is transferred to the load side, and the primary current of the high frequency transformer flows through the switch S1 and the inductor LlkA high-frequency transformer and inductor Lm, a switch S4, and finally flowing into the ground; the secondary current of the high-frequency transformer flows through a switching tube S5 resonant switch Q1 inductor L0The load, diode S6, eventually flows into ground.
Mode 2; in this mode, energy is transferred to the load side, and the primary current of the high frequency transformer flows through the switch S1 and the inductor LlkA high-frequency transformer and inductor Lm, a switch S4, and finally flowing into the ground; the secondary current of the high-frequency transformer flows through a switching tube S5, a capacitor C and a capacitor C of a Q1 in a resonant soft switching unit, a diode D6 and an inductor L0Load, diode S6 eventually flows into ground
Modality 3: in this mode, energy is transferred to the load side, and the primary current of the high frequency transformer flows through the switch S1 and the inductor LlkA high-frequency transformer and inductor Lm, a switch S4, and finally flowing into the ground; the secondary current of the high-frequency transformer flows through the switch tube S5, the capacitor C, the diodes D5, D6 and the inductor L0Load, diode S6 eventually flows into ground
Modality 4: in this mode, only a littleA small magnetizing current flows through the switch tube S1, inductor LlkInductance LmThe switching tube S4 and the primary side of the high-frequency transformer, thereby realizing zero-current switching of the main switch; on the secondary side of the high-frequency transformer, diodes D5, D6 and an inductor L0 form a closed loop.
Mode 5: in this mode, the switching tubes S1 and S4 on the primary side of the high-frequency transformer are turned off, the magnetizing current flows through the capacitors S1 and S4, and a loop is formed by the diodes and the capacitors of the inductor Llk, the inductor Lm, the switching tubes S2 and S3; the secondary side of the high-frequency transformer, the diodes D5 and D6 and the inductor L0 form a closed loop.
Modality 6: in this mode, the primary switching tubes S2 and S3 of the high-frequency transformer are turned on, and current flows through the inductor Lik and the inductor Lm; on the secondary side of the high-frequency transformer, current flows through a switching tube Q1, an inductor L0, a capacitor C0, a diode D5 and the capacitor C to form a closed loop.
Modality 7: in this mode, the primary switches S2 and S3 of the high-frequency transformer are turned on, and the current flows through the inductor Llk, the inductor Lm and the high-frequency transformer; when the switching tubes S6 and S7 and the switching tube Q1 on the secondary side of the high-frequency transformer are opened, current flows through the capacitor C and the diode D5 simultaneously.

Claims (4)

1. The utility model provides an alternating current-direct current hybrid energy router of all-round soft switch which characterized in that: the router comprises a three-phase bidirectional rectifying unit, a double-active full-bridge conversion unit, an all-dimensional zero-voltage soft switching unit, a staggered parallel Boost unit, a four-switch Buck-Boost unit, a single-phase full-bridge bidirectional inversion unit, a high-voltage direct-current bus, a low-voltage direct-current bus, a sampling circuit, a voltage sampling circuit, a DSP control panel, a driving circuit and a power circuit;
the input end of a three-phase bidirectional rectifying unit is connected with a 10KV power distribution network, the output end of the three-phase bidirectional rectifying unit is connected with a high-voltage direct-current bus, a double-active full-bridge conversion unit is connected with the high-voltage direct-current bus, an omnibearing zero-voltage soft switching unit acts on the double-active full-bridge conversion unit, the output ends of the double-active full-bridge conversion unit are respectively connected with a 400V low-voltage direct-current bus, the input end of a single-phase full-bridge bidirectional inversion unit is connected with the 400V low-voltage direct-current bus, the output ends of a staggered parallel Boost unit and a four-switch Buck-Boost unit are respectively connected to the 400V low-voltage direct-current bus, distributed generating equipment;
the DSP control board is connected with the double-active full-bridge conversion unit, the staggered parallel Boost unit, the four-switch Buck-Boost unit and the single-phase full-bridge bidirectional inversion unit through the driving circuit; the double-active full-bridge conversion unit is connected with a high-voltage direct-current bus and a low-voltage direct-current bus, the high-voltage direct-current bus and the low-voltage direct-current bus are connected to the DSP control panel through a sampling circuit, and the auxiliary power supply is connected with the drive circuit, the DSP control panel and the sampling circuit;
the omnibearing zero-voltage soft-switching double-active full-bridge conversion unit comprises a high-frequency inversion module, a high-frequency transformer module, a rectification output module and a soft-switching module, wherein the working modes of the omnibearing zero-voltage soft-switching double-active full-bridge conversion unit are 14, and the working modes are respectively 7 in forward and reverse directions and are the same;
mode 1: in this mode, energy is transferred to the load side, and the primary current of the high frequency transformer flows through the switch S1 and the inductor LlkA high-frequency transformer and inductor Lm, a switch S4, and finally flowing into the ground; the secondary current of the high-frequency transformer flows through a switching tube S5 resonant switch Q1 inductor L0Load, diode S6 eventually flows into ground;
mode 2; in this mode, energy is transferred to the load side, and the primary current of the high frequency transformer flows through the switch S1 and the inductor LlkA high-frequency transformer and inductor Lm, a switch S4, and finally flowing into the ground; the secondary current of the high-frequency transformer flows through a switching tube S5, a capacitor C and a capacitor C of a Q1 in a resonant soft switching unit, a diode D6 and an inductor L0Load, diode S6 eventually flows into ground
Modality 3: in this mode, energy is transferred to the load side, and the primary current of the high frequency transformer flows through the switch S1 and the inductor LlkA high-frequency transformer and inductor Lm, a switch S4, and finally flowing into the ground; the secondary current of the high-frequency transformer flows through the switch tube S5, the capacitor C, the diodes D5, D6 and the inductor L0Load, diode S6 eventually flows into ground
Modality 4: in this mode, onlyA small magnetizing current flows through the switch tube S1, the inductor LlkInductance LmThe switching tube S4 and the primary side of the high-frequency transformer, thereby realizing zero-current switching of the main switch; on the secondary side of the high-frequency transformer, diodes D5, D6 and an inductor L0 form a closed loop;
mode 5: in this mode, the switching tubes S1 and S4 on the primary side of the high-frequency transformer are turned off, the magnetizing current flows through the capacitors S1 and S4, and a loop is formed by the diodes and the capacitors of the inductor Llk, the inductor Lm, the switching tubes S2 and S3; the secondary side of the high-frequency transformer, diodes D5, D6 and an inductor L0 form a closed loop;
modality 6: in this mode, the primary switching tubes S2 and S3 of the high-frequency transformer are turned on, and current flows through the inductor Lik and the inductor Lm; on the secondary side of the high-frequency transformer, current flows through a switching tube Q1, an inductor L0, a capacitor C0, a diode D5 and the capacitor C to form a closed loop;
modality 7: in this mode, the primary switches S2 and S3 of the high-frequency transformer are turned on, and the current flows through the inductor Llk, the inductor Lm and the high-frequency transformer; when the switching tubes S6 and S7 and the switching tube Q1 on the secondary side of the high-frequency transformer are opened, current flows through the capacitor C and the diode D5 simultaneously.
2. The omni-directional soft-switched AC/DC hybrid energy router of claim 1, characterized in that: the three-phase bidirectional rectifying unit, the double-active full-bridge conversion unit, the omnibearing zero-voltage soft switching unit, the four-switch Buck-Boost unit and the single-phase full-bridge bidirectional inversion unit respectively have three energy flow working modes of forward conduction, reverse conduction and non-conduction, wherein the energy flows from the input end to the output end and is forward conduction, the energy flows from the output end to the input end and is reverse conduction, no energy flows through and is non-conduction, and different working modes of the energy router device applied to the energy internet are formed according to different energy flow working modes of each unit.
3. The method of claim 1, wherein the method further comprises: the mutual power conversion between the 10KV power distribution network and the high-voltage direct current is realized by utilizing the three-phase bidirectional rectifying unit, and the working of the three-phase bidirectional rectifying unit in a rectifying working mode or an inverting working mode is realized; the double-active full-bridge conversion unit realizes mutual power conversion between high-voltage direct current and low-voltage direct current and realizes that the double-active full-bridge conversion unit works in a boosting working mode or a voltage reduction working mode; the omnibearing zero-voltage soft switching unit realizes the soft switching process of the double-active full-bridge unit in the process of realizing power conversion between high-voltage direct current and low-voltage direct current, and the interleaved Boost units are connected in parallel and used for solving the problem of a photovoltaic grid-connected access interface and realizing MPPT tracking of a photovoltaic cell; the four-switch Buck-Boost unit is used for providing an interface for the energy storage equipment, has the functions of charge-discharge control and power quality management, and realizes plug and play; the single-phase full-bridge bidirectional inversion unit is used for realizing the interconversion between low-voltage direct current and 220V and 50HZ alternating current voltages and realizing the working in a rectification working mode or an inversion working mode; the high-voltage direct-current bus is used for stabilizing the output voltage of the three-phase bidirectional rectifying unit and the input voltage of the double-active full-bridge conversion unit; low-voltage direct-current bus: the single-phase full-bridge bidirectional inverter is used for interleaving the output voltage of the parallel Boost unit, the input voltage of the four-switch Buck-Boost unit and the input voltage of the single-phase full-bridge bidirectional inverter.
4. The method for controlling the omni-directional soft-switching AC/DC hybrid energy router according to claim 3, wherein: the control method comprises the following steps:
step 1: initializing an omnibearing zero-voltage switch double-active full-bridge converter unit, and pre-charging a high-voltage direct-current bus equivalent capacitor and a low-voltage direct-current bus equivalent capacitor;
step 2: the sampling circuit collects a voltage signal of the high-voltage direct-current bus and a voltage signal of the low-voltage direct-current bus and transmits the voltage signals to the DSP;
and step 3: the DSP calculates active power and reactive power flowing through a high-voltage direct-current bus and a low-voltage direct-current bus in real time, judges the energy flowing direction of the omnibearing zero-voltage soft-switching double-active full-bridge converter unit, outputs a PWM signal to a driving circuit, if energy flows from the input end to the output end of the omnibearing zero-voltage soft-switching double-active full-bridge converter unit, the energy is in a voltage-reducing working mode, step 4 is executed, if the output end of the energy omnibearing zero-voltage soft-switching double-active full-bridge converter unit flows to the input end, the energy is in a voltage-increasing working mode, step 5 is executed, otherwise, if no energy flows through the omnibearing zero-voltage soft-switching double-active full-bridge;
and 4, step 4: the omnibearing zero-voltage soft-switching double-active full-bridge converter unit works in a voltage reduction working mode, a high-frequency inversion module of the omnibearing zero-voltage soft-switching double-active full-bridge converter unit works according to different working modes, and a rectification output module is in a natural rectification state;
and 5: the all-round zero voltage soft switch double-active full-bridge converter unit works in a boosting working mode, the rectification output module of the all-round zero voltage soft switch double-active full-bridge converter unit works according to different working modes, and the high-frequency inversion module is in a natural rectification state.
CN201711129877.0A 2017-11-15 2017-11-15 Alternating current-direct current hybrid energy router of all-round soft switch Active CN107888073B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711129877.0A CN107888073B (en) 2017-11-15 2017-11-15 Alternating current-direct current hybrid energy router of all-round soft switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711129877.0A CN107888073B (en) 2017-11-15 2017-11-15 Alternating current-direct current hybrid energy router of all-round soft switch

Publications (2)

Publication Number Publication Date
CN107888073A CN107888073A (en) 2018-04-06
CN107888073B true CN107888073B (en) 2020-03-03

Family

ID=61777271

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201711129877.0A Active CN107888073B (en) 2017-11-15 2017-11-15 Alternating current-direct current hybrid energy router of all-round soft switch

Country Status (1)

Country Link
CN (1) CN107888073B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108767863B (en) * 2018-06-25 2021-03-26 哈尔滨工程大学 Power regulation and control strategy of two-subarea power distribution system with DAB converter as node

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104682430A (en) * 2015-02-16 2015-06-03 东北大学 Energy router device applied to energy Internet
CN104753322A (en) * 2015-04-07 2015-07-01 国家电网公司 Power router main circuit topology and power supply system
CN106803672A (en) * 2016-12-06 2017-06-06 上海电力学院 The energy source router and control strategy of family type energy LAN
CN107017638A (en) * 2017-05-23 2017-08-04 杭州电子科技大学 A kind of many bus electric energy router topological structures of multiport suitable for power distribution network

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104682430A (en) * 2015-02-16 2015-06-03 东北大学 Energy router device applied to energy Internet
CN104753322A (en) * 2015-04-07 2015-07-01 国家电网公司 Power router main circuit topology and power supply system
CN106803672A (en) * 2016-12-06 2017-06-06 上海电力学院 The energy source router and control strategy of family type energy LAN
CN107017638A (en) * 2017-05-23 2017-08-04 杭州电子科技大学 A kind of many bus electric energy router topological structures of multiport suitable for power distribution network

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"Power Distribution Strategy of Energy Router Based in Energy Storage Multi-mode Operation";Zhao Zhang, et al,;《2017 Chinese Automation Congress》;20171022;第6279-6284页 *

Also Published As

Publication number Publication date
CN107888073A (en) 2018-04-06

Similar Documents

Publication Publication Date Title
CN103441691B (en) A kind of mode of resonance electronic power convertor and converter device
Tan et al. Topology and application of bidirectional isolated dc-dc converters
CN101316074B (en) Back-to-back three-power level midpoint clamping current transformer of wind power generation system
CN102005957B (en) Single-power supply cascade multi-level converter
US11050359B2 (en) Single-stage multi-input buck type low-frequency link's inverter with an external parallel-timesharing select switch
CN103178742A (en) Topological structure of combined bidirectional DC/AC (direct current/alternating current) converter
WO2012010053A1 (en) Transformer-less static synchronous compensator (statcom) topological structure based on modular multilevel converter (mmc)
WO2012010054A1 (en) Modular multilevel converter-based transformerless solar power inverter topological structure
CN111416536A (en) Single-phase double-boosting bridgeless five-level rectifier based on bidirectional tube insertion
CN111342693B (en) Boost-buck photovoltaic grid-connected inverter
Zhang et al. A critical topology review of power electronic transformers: In view of efficiency
CN103023362A (en) Bridgeless inverter circuit and solar bridgeless inverter
CN202586797U (en) Five-level variable-current topological structure with bidirectional power switches and application thereof
Huang et al. Large-scale photovoltaic generation system connected to HVDC grid with centralized high voltage and high power DC/DC converter
CN102291014A (en) Alternating-current chopping-full-bridge rectification AC-DC (alternating current-to-direct current) converter
CN105186919A (en) Non-isolated grid-connected converter, air-conditioning system and converter control method
EP3637611A1 (en) Voltage-type single-stage multi-input high frequency link inverter having built-in parallel time-sharing selection switches
TWI664797B (en) Dc power converter with high voltage gain
Wang et al. Research on loss reduction of dual active bridge converter over wide load range for solid state transformer application
CN107888073B (en) Alternating current-direct current hybrid energy router of all-round soft switch
CN111404409A (en) Multi-port power electronic transformer topology based on MMC and control method thereof
CN204696955U (en) A kind of photovoltaic DC-to-AC converter adopting transformer auxiliary resonance
CN202475260U (en) High step-up ratio converter, solar energy inverter and solar energy cell system
CN104734531B (en) Frequency converter
Neshaastegaran et al. Investigation of single-stage flyback inverter under different operating modes

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
GR01 Patent grant
GR01 Patent grant