CN110148939B - Household power energy router - Google Patents
Household power energy router Download PDFInfo
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- CN110148939B CN110148939B CN201910458228.8A CN201910458228A CN110148939B CN 110148939 B CN110148939 B CN 110148939B CN 201910458228 A CN201910458228 A CN 201910458228A CN 110148939 B CN110148939 B CN 110148939B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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Abstract
A household power energy router relates to the field of power energy routers and aims to meet the requirements of energy routers in medium and low power application occasions. The direct current end of the alternating current interface is connected with a 360V direct current bus, the alternating current end of the alternating current interface is connected with an alternating current power grid or an external power energy router, the input end of the load interface is connected with the 360V direct current bus, the output end of the load interface is connected with a load, the output end of the distributed power interface is connected with the 360V direct current bus, the input end of the distributed power interface is connected with a power supply, and the energy storage equipment is connected with the 360V direct current bus through the energy storage interface; the alternating current interface, the load interface, the distributed power interface and the energy storage interface are all realized by adopting converters, and two ends of each converter are connected with a signal coupler in parallel; the control module is used for sensing and controlling the states of the alternating current interface, the load interface, the distributed power interface and the energy storage interface. The invention is suitable for medium and small power application occasions.
Description
Technical Field
The invention relates to the field of power energy routers.
Background
With the development and maturity of new energy technology and the continuous progress of energy storage technology, the power generation mode is changed from the traditional centralized power generation to the direction of a distributed power system, and the flowing mode of electric energy is also changed from the traditional single-direction flowing to the multi-direction flowing. On the other hand, the characteristics of fluctuation, intermittence, imbalance between capacity and energy usage, regional imbalance and the like of the renewable energy also seriously restrict the large-scale use of the renewable energy.
In order to solve the problems encountered in the development process of renewable energy, people put forward the concept of a power energy router (hereinafter referred to as an energy router), take a power electronic transformer as a core, combine renewable energy with internet technology, realize the reasonable matching operation of a traditional power grid, a distributed power generation system and a distributed energy storage system, output different types of energy in a stable energy form after optimized scheduling, and effectively solve the problem of system stability caused by the characteristics of geographical dispersibility, production randomness, volatility, uncontrollable property and the like of the renewable energy. However, the current research on energy routers has the following problems:
(1) the energy router needs to coordinate and schedule various types of electric energy, the current research on the topological structure is not comprehensive and specific enough, and different topological structures are needed in different application occasions;
(2) currently, most of the energy routers studied are high-power application occasions, and medium-and-small-power application occasions, especially application occasions such as families, communities, industrial parks and the like, because the types of electric power equipment are various, the application forms and energy routing strategies of the energy routers are also different, a new energy router topology is needed to adapt to the application environments, and the energy routers suitable for the occasions need to be further explored.
Disclosure of Invention
The invention aims to meet the requirement of an energy router in a medium and small power application occasion, thereby providing a household power energy router.
The invention relates to a household power energy router which comprises a 360V direct current bus, an alternating current interface, a load interface, a distributed power supply interface, an energy storage interface and a control module;
the direct current end of the alternating current interface is connected with a 360V direct current bus, the alternating current end of the alternating current interface is connected with an alternating current power grid or an external power energy router, the input end of the load interface is connected with the 360V direct current bus, the output end of the load interface is connected with a load, the output end of the distributed power interface is connected with the 360V direct current bus, the input end of the distributed power interface is connected with a power supply, and the energy storage equipment is connected with the 360V direct current bus through the energy storage interface;
the alternating current interface, the load interface, the distributed power interface and the energy storage interface are all realized by adopting converters, and two ends of each converter are connected with a signal coupler in parallel;
the control module is used for sensing and controlling the states of the alternating current interface, the load interface, the distributed power interface and the energy storage interface.
Preferably, the alternating current interface comprises at least 1 isolated bidirectional AC/DC converter;
each isolated bidirectional AC/DC converter comprises a capacitor CdThe single-phase full-bridge inverter circuit comprises a single-phase full-bridge inverter circuit, an inductor Lm, a first-order EMI filter and an isolation transformer;
capacitor CdThe positive pole of the capacitor C is simultaneously connected with the positive pole of the 360V direct current bus, the positive pole input end of the single-phase full-bridge inverter circuit and the capacitor CdThe negative pole of connecting 360V direct current generating line and single-phase full-bridge inverter circuit's negative pole input simultaneously, the one end of inductance Lm is connected to single-phase full-bridge inverter circuit's first output, the first input of first-order EMI wave filter is connected to the other end of inductance Lm, the second input of EMI wave filter is connected to full-bridge inverter circuit's second output, the primary side of isolation transformer is connected to the output of first-order EMI wave filter, alternating current network or outside power energy router are connected to isolation transformer's secondary side.
Preferably, the load interface comprises a unidirectional DC/DC converter, a 48V low-voltage direct current bus and at least 1 unidirectional DC/AC converter;
the unidirectional DC/DC converter comprises a first full-bridge circuit, a second full-bridge circuit, and a transformer Tr1And a capacitance Ci;
the positive input end of the first full-bridge circuit is connected with the positive electrode of the 360V direct current bus, the negative input end of the first full-bridge circuit is connected with the negative electrode of the 360V direct current bus, and the positive output end of the first full-bridge circuit is connected with the transformer Tr1The homonymous terminal of the primary side and the negative output terminal of the first full-bridge circuit are connected with the transformer Tr1Primary side synonym terminal, transformer Tr1The dotted terminal of the secondary side is connected with the positive input terminal of the second full bridge circuit, and the transformer Tr1The synonym end of the secondary side is connected with the negative input end of a second full-bridge circuit, the positive output end of the second full-bridge circuit is simultaneously connected with one end of a capacitor Ci and the positive electrode of a 48V low-voltage direct-current bus, the negative output end of the second full-bridge circuit is simultaneously connected with the other end of the capacitor Ci and the negative electrode of the 48V low-voltage direct-current bus, and a direct-current load is hung on the 48V low-voltage direct-current bus;
each unidirectional DC/AC converter comprises a capacitor CtThe third full-bridge circuit, the inductor Ln and the first-order EMI filter;
capacitor CtThe positive pole of the capacitor C is simultaneously connected with the positive pole of the 360V direct current bus and the positive pole input end of the third full-bridge circuittThe negative pole of 360V direct current generating lines and the negative pole input of third full-bridge circuit are connected simultaneously, the one end of inductance Ln is connected to the first output of third full-bridge circuit, the first input of first-order EMI wave filter is connected to the other end of inductance Ln, the second input of first-order EMI wave filter is connected to the second output of third full-bridge circuit, and alternating current load is connected to the output of first-order EMI wave filter.
Preferably, the distributed power interface comprises at least one unidirectional DC/DC converter and at least one unidirectional AC/DC converter;
each unidirectional DC/DC converter includes a diode D1Diode D2Switch Sp1Switch Sp2Power inductor Lp1Power inductor Lp2Filter capacitor Cp1And a filter capacitor Cp2；
Cathode connection diode D of 360V direct current bus2Anode of (2), diode D2Cathode of the switch Sp2And a power inductor Lp2One end of (1), switch Sp2The other end of the filter is simultaneously connected with a filter capacitor Cp2And a diode D1Cathode of (2), diode D1Anode of the switch Sp1And a power inductor Lp1One terminal of (1), power inductance Lp1The other end of the filter is simultaneously connected with a filter capacitor Cp1And the negative electrode of the photovoltaic system, the power inductor Lp2Another terminal of (1), filter capacitor Cp2Another end of (1), switch Sp1Another terminal of (1), filter capacitor Cp1One end of the connecting rod and the anode of the 360V direct current bus are simultaneously connected with the anode of the photovoltaic system;
each unidirectional AC/DC converter comprises a capacitor CtThe full-bridge circuit, the inductor Ln and the first-order EMI filter;
capacitor CtThe positive electrode ofThe positive electrode of the 360V direct current bus is connected with the positive electrode input end of the full-bridge circuit in time, and the capacitor CtThe negative pole of 360V direct current generating line and the negative pole input of full-bridge circuit are connected simultaneously, the one end of inductance Ln is connected to the first output of full-bridge circuit, the first input of first-order EMI wave filter is connected to the other end of inductance Ln, the second input of first-order EMI wave filter is connected to the second output of full-bridge circuit, wind power generation system is connected to the output of first-order EMI wave filter.
Preferably, the energy storage interface comprises at least one three-port DC/DC converter;
each three-port DC/DC converter comprises a capacitor C1, an inductor L1, an inductor L2 and an inductor LK1To the inductance LK3Transformer Tr2Switches S1 to S12, a battery and a super capacitor;
the positive pole of the 360V direct current bus is connected with the positive pole input end of the fourth full-bridge circuit, the negative pole of the 360V direct current bus is connected with the negative pole input end of the fourth full-bridge circuit, and the positive pole output end of the fourth full-bridge circuit is connected with the inductor LK3One terminal of (1), inductance LK3The other end of the transformer T is connected withr2The homonymous terminal of the primary side and the negative output terminal of the fourth full-bridge circuit are connected with the transformer Tr2Primary side synonym terminal, transformer Tr2The first same-name end of the secondary side is connected with an inductor LK1One terminal of (1), inductance LK1Is connected to the positive input terminal of the fifth full bridge circuit and one end of the inductor L1, and the transformer Tr2The negative pole input end of the fifth full-bridge circuit and the one end of inductance L2 are connected simultaneously to the first synonym end of secondary side, the positive pole of battery is connected simultaneously to the other end of inductance L1 and the other end of inductance L2, the positive pole output end of fifth full-bridge circuit connects the positive pole of electric capacity C1, the negative pole of battery and the negative pole output end of fifth full-bridge circuit are connected simultaneously to the negative pole of electric capacity C1, transformer Tr2The second homonymous terminal of the secondary side is connected with an inductor LK2One terminal of (1), inductance LK2The other end of the second full-bridge circuit is connected with the anode input end of the sixth full-bridge circuit and a transformer Tr2The second synonym terminal of the secondary side is connected with the negative input terminal of the sixth full-bridge circuit, the positive output terminal of the sixth full-bridge circuit is connected with the positive electrode of the super capacitor,and the negative electrode output end of the sixth full-bridge circuit is connected with the negative electrode of the super capacitor.
Preferably, the energy storage interface further comprises at least one unidirectional DC/DC converter;
each unidirectional DC/DC converter comprises a first full-bridge circuit, a second full-bridge circuit and a transformer Tr1And a capacitance Ci;
the positive input end of the first full-bridge circuit is connected with the positive electrode of the 360V direct current bus, the negative input end of the first full-bridge circuit is connected with the negative electrode of the 360V direct current bus, and the positive output end of the first full-bridge circuit is connected with the transformer Tr1The homonymous terminal of the primary side and the negative output terminal of the first full-bridge circuit are connected with the transformer Tr1Primary side synonym terminal, transformer Tr1The dotted terminal of the secondary side is connected with the positive input terminal of the second full bridge circuit, and the transformer Tr1The synonym end of the secondary side is connected with the negative input end of the second full-bridge circuit, the positive output end of the second full-bridge circuit is simultaneously connected with one end of the capacitor Ci and the positive electrode of the equipment storage battery, and the negative output end of the second full-bridge circuit is simultaneously connected with the other end of the capacitor Ci and the negative electrode of the equipment storage battery.
Compared with the existing power generation and utilization mode, the household power energy router provided by the invention has the outstanding advantages that:
(1) the energy router can realize 'wind-light-storage-source-load' coordinated optimization operation, not only can solve the problem of waste caused by incapability of timely consumption of new energy power generation, but also can plan an optimal energy flow path through the control module, and improves the efficiency of energy utilization.
(2) The communication network of the energy router is formed by adopting a power line carrier communication technology, so that the integrated transmission of energy and information is realized, the system structure is simplified, the modular design of the system is facilitated, and the expansion and integration of the system are facilitated.
(3) The control module senses parameters and environment information of the external equipment of each port, and the system works in an optimal state through calculation and control, so that the plug and play of the equipment is realized.
(4) The modular design of system components is realized by adopting the power electronic converter, so that the universal type is strong, the expansion is convenient, the interconnection of a plurality of energy routers is easy to realize, and the power electronic converter has wide application prospect in occasions such as families, communities, industrial parks and the like.
Drawings
FIG. 1 is a topology diagram of a home power router according to the present invention;
FIG. 2 is a topology block diagram of an isolated bidirectional AC/DC converter;
FIG. 3 is a topology diagram of a three-port DC/DC converter;
FIG. 4 is a topology diagram of a bi-directional DC/DC converter;
FIG. 5 is a topology block diagram of a unidirectional DC/DC converter;
fig. 6 is a topology structure diagram of a unidirectional AC/DC converter.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
A household power energy router comprises a 360V direct current bus, an alternating current interface, a load interface, a distributed power supply interface, an energy storage interface and a control module;
the direct current end of the alternating current interface is connected with a 360V direct current bus, the alternating current end of the alternating current interface is connected with a power grid or an external power energy router, the input end of the load interface is connected with the 360V direct current bus, the output end of the load interface is connected with a load, the output end of the distributed power interface is connected with the 360V direct current bus, the input end of the distributed power interface is connected with a power supply, and the energy storage equipment is connected with the 360V direct current bus through the energy storage interface;
the alternating current interface, the load interface, the distributed power interface and the energy storage interface are all realized by adopting converters, and two ends of each converter are connected with a signal coupler in parallel;
the control module is used for sensing and controlling the states of the alternating current interface, the load interface, the distributed power interface and the energy storage interface.
Fig. 1 is a topology diagram of a home power energy router. The core of the energy router is a 360V direct current bus, and a power supply, a load and energy storage equipment are connected to the 360V direct current bus through various power electronic converters (an AC/DC converter, a DC/DC converter and the like). The energy router adopts a power line carrier communication technology as a communication method, wherein a black solid line in figure 1 represents a power branch, a black thin dotted line represents an information branch, and a signal coupler is bridged at two ends of each power electronic converter for providing a signal path, so that the power branch is utilized for signal transmission, and the integrated transmission of energy and information is really realized.
According to the property of the access energy router equipment, the peripheral interface of the energy router can be divided into the following four parts:
(1) AC interface
The energy router is applied to occasions such as families, communities, industrial parks and the like, and each energy router and external equipment thereof form an energy unit with autonomous regions. Typically, each energy unit needs to be connected to the AC grid through an isolated bidirectional AC/DC converter to which node 1 in fig. 1 is connected.
(2) Load interface
The energy router needs to provide interfaces for various loads commonly used in a family or an industrial park, and at a node 2 in fig. 1, a 360V direct current bus voltage is changed into 220V power frequency alternating current through a unidirectional DC/AC converter to be supplied to an alternating current load. The voltage of the 360V DC bus is converted into 48V DC by the unidirectional DC/DC converter shown in node 3 in fig. 1, and a plurality of common DC electric devices are connected to the 48V low-voltage DC bus.
(3) Interface for distributed power supply
The core role of the energy router is to absorb the energy generated by the distributed power supply. In fig. 1, at a node 4, a photovoltaic system is connected to an energy router through a unidirectional DC/DC converter, and at a node 5, a wind power generation system is connected to the energy router through a unidirectional AC/DC converter.
(4) Interface for energy storage system
Due to seasonal changes of solar energy and wind energy and changes of different time periods in a day, output energy of the solar energy and the wind energy fluctuates greatly, an energy storage system is required to be used for peak clipping and valley filling, and the direct current bus voltage is supported within a proper range. In fig. 1, a hybrid energy storage system composed of a storage battery and a super capacitor is connected to an energy router through a three-port DC/DC converter at a node 7 and a node 8. In addition, the electric automobile can also be used as an energy storage device, the electric automobile is charged when the system energy is sufficient, and a part of energy can be provided by the idle electric automobile when the energy supply is insufficient.
It should be noted that only one interface is shown for each type of load, ac grid, distributed power supply, and energy storage device in fig. 1. Because all kinds of interfaces realize the modularized design, if a plurality of loads, power supplies or energy storage devices are accessed to the energy router, the same connecting branch can be expanded.
The following describes the topology of each power single-photon converter in fig. 1 in detail:
(1) isolated bidirectional AC/DC converter
The bidirectional AC/DC converter shown in FIG. 2 is a converter at node 1 in FIG. 1 and adopts a single-phase full-bridge topology, Q1-Q4 are silicon carbide MOS (metal oxide semiconductor) tubes with anti-parallel diodes, the DC side of the MOS tubes is connected to a 360V main current bus, and the MOS tubes are connected with the main current bus through a DC bus capacitor CdThe ripple and the fluctuation on a direct current bus are reduced, a first-order EMI (electromagnetic interference) filter is used on an alternating current side to filter out alternating current clutter components, and then the alternating current clutter components are connected to a power grid or other energy routers after passing through a 1:1 isolation transformer.
The single-phase full-bridge structure has the advantages that the bidirectional flow of energy can be realized, the transmission of active power and reactive power can be controlled, and the requirement of energy exchange between power grids of the energy router is met.
It should be noted that, through the isolated bidirectional AC/DC converter in fig. 2, energy exchange is realized between two energy routers and between an energy router and a power grid, but in consideration of the problem of inconsistent ground lines between different energy router units and in order to protect an energy router system, a 1:1 isolation transformer is added at an interface on an alternating current side, so that only energy exchange but no electrical connection is performed between two energy routers and between an energy router and a power grid, a fault isolation function is achieved, and an effect of protecting the system is achieved.
(2) Three-port DC/DC converter
Fig. 3 is a topology structure diagram of a three-port DC/DC converter, corresponding to the power converters at node 7 and node 8 in fig. 1, where N1 to N3 are all coil turns. In the topology, three modules are coupled through a multi-winding transformer, a super capacitor interface part and a 360V direct current bus interface part are both in a full-bridge structure, a storage battery interface part adopts a staggered parallel LLC full-bridge converter to reduce current and ripples, and S1-S12 are silicon carbide MOS tubes with anti-parallel diodes.
The characteristics and advantages of the topology are adopted:
1) the super capacitor has strong transient response capability, the capacity of the storage battery is large, and the energy which can be stored is large, so that the hybrid energy storage mode combining the storage battery and the super capacitor is adopted, the energy storage system has good transient response capability, the sudden disturbance in the energy router can be inhibited, and the energy router also has certain cruising capability.
2) Above-mentioned three ports all can carry out two-way energy exchange between two liang, and battery and super capacitor can be to the electric wire netting energy supply, also can directly carry out energy exchange and need not pass through direct current bus each other between battery and the super capacitor for energy storage system's energy flow mode is very nimble, and corresponding effect is also better.
(3) Bidirectional DC/DC converter
FIG. 4 shows a bidirectional DThe topology structure diagram of the C/DC converter is that the single-phase DC/DC converter at the node 3 and the bidirectional DC/DC converter at the node 6 in the topology structure diagram of the C/DC converter in FIG. 1 are both the same. The bidirectional DC/DC converter adopts a double-active-bridge isolated topology, Sl1～Sl4、Sh1～Sh4Is a silicon carbide MOS tube with an anti-parallel diode, Tr1Is a high-frequency transformer, and Ci is a filter capacitor at a low-voltage side.
The characteristics and advantages of the topological structure are adopted:
1) the capacity is large, and the power capable of being transmitted is large;
2) the isolation is realized through the transformer, so that the low-voltage side direct-current power equipment, the electric automobile and the energy router are not electrically connected, and the fault isolation is realized;
3) the primary side and the secondary side of the bidirectional DC/DC converter are flexibly controlled, and the requirements of energy transmission in different forms are met.
(4) Unidirectional DC/DC converter
Fig. 5 is a topology structure diagram of a unidirectional DC/DC converter, which corresponds to an interface of the photovoltaic system at the node 4 in the energy router of fig. 1. Wherein Sp1And Sp2Is a silicon carbide MOS transistor, Lp1And Lp2Is a power inductor, Cp1And Cp2Is a filter capacitor, D1And D2Is a diode.
The DC/DC converter is of a two-stage structure, a front-stage Boost circuit achieves the maximum power point tracking function of the photovoltaic system access, and a rear-stage Buck-Boost circuit stabilizes the direct current voltage to 360V and accesses the direct current voltage to a 360V direct current bus.
(5) Unidirectional AC/DC converter
FIG. 6 is a topological structure diagram of a unidirectional AC/DC converter, Q5-Q8 are silicon carbide MOS tubes with anti-parallel diodes, CtLn is a filter capacitor and is a power inductor. In the energy router of FIG. 1, an alternating current load at a node 2 and a wind power generation system at a node 5 are connected to a 360V direct current bus through the converter. When the AC side is connected with an AC load, the converter operates in an inversion state, and when the AC side is connected with a fan, the converter operates in a rectification state.
A control module:
each family is regarded as an energy router unit, all power equipment in the family is accessed to an energy router through corresponding interfaces to provide or absorb energy, the control module controls the operation of the whole system, reasonable distribution and optimal scheduling of the energy in the system are realized internally, and energy exchange between the energy router system and a large power grid is realized through the interface between the external power equipment and an alternating current power grid.
The energy storage device provides electricity utilization buffer for the energy router, the simultaneity of power supply and electricity utilization is broken, and the energy storage device is a load and a power supply in the system. When the generated energy of the renewable energy is larger than the current power demand, the energy storage equipment is charged, and if redundant energy exists, the energy is considered to be transmitted to a power grid (a residual power grid-surfing principle); when the generated energy of the renewable energy source is equal to the current power demand, the energy storage equipment does not work, and no energy exchange exists between the energy router and the power grid; when the generated energy of the renewable energy source is smaller than the current power demand, the energy storage system discharges to supply energy, and if the energy is insufficient, the energy is absorbed from the power grid.
The 360V direct current bus in the energy router is the pivot of the energy route, so it is very important to maintain the stability of the direct current bus voltage, and because the problems of whether the power grid equipment at each interface is accessed, whether the power grid equipment works and whether the power grid equipment has faults or not, a plurality of power grid equipment are needed to be mutually coordinated to support the direct current bus voltage. When the energy router is in grid-connected operation, the direct-current bus voltage can be stabilized by means of a large-capacity alternating-current power grid, and system fluctuation is stabilized; when the device is in an island state, the energy storage system is reliably connected, and the direct current bus voltage can be supported by the energy storage system.
The energy router of the embodiment takes various power electronic converters as a core, realizes conversion of electric energy in different forms, and performs energy distribution and scheduling by taking a direct current bus as a pivot; the power line carrier communication technology is adopted to form a communication network, the power circuit can transmit energy and information at the same time, so that the energy router has a plug-and-play function, the requirement of access expansion of more power supplies, loads and energy storage equipment can be met, the energy router can realize the functions of interface state sensing, plug-and-play, energy routing, fault protection and the like, and the energy router has a wide application prospect in places such as homes, communities and industrial parks.
Claims (5)
1. A household power energy router comprises a 360V direct current bus, an alternating current interface, a load interface, a distributed power supply interface, an energy storage interface and a control module;
the direct current end of the alternating current interface is connected with a 360V direct current bus, the alternating current end of the alternating current interface is connected with an alternating current power grid or an external power energy router, the input end of the load interface is connected with the 360V direct current bus, the output end of the load interface is connected with a load, the output end of the distributed power interface is connected with the 360V direct current bus, the input end of the distributed power interface is connected with a power supply, and the energy storage equipment is connected with the 360V direct current bus through the energy storage interface;
the alternating current interface, the load interface, the distributed power interface and the energy storage interface are all realized by adopting converters, and two ends of each converter are connected with a signal coupler in parallel;
the control module is used for sensing and controlling the states of the alternating current interface, the load interface, the distributed power supply interface and the energy storage interface;
wherein the energy storage interface comprises at least one three-port DC/DC converter;
each three-port DC/DC converter comprises a capacitor C1, an inductor L1, an inductor L2 and an inductor LK1To the inductance LK3Transformer Tr2Switches S1 to S12, a battery and a super capacitor;
the positive pole of the 360V direct current bus is connected with the positive pole input end of the fourth full-bridge circuit, the negative pole of the 360V direct current bus is connected with the negative pole input end of the fourth full-bridge circuit, and the positive pole output end of the fourth full-bridge circuit is connected with the inductor LK3One terminal of (1), inductance LK3The other end of the transformer T is connected withr2The homonymous terminal of the primary side and the negative output terminal of the fourth full-bridge circuit are connected with the transformer Tr2Primary side synonym terminal, transformer Tr2The first same-name end of the secondary side is connected with an inductor LK1One terminal of (1), inductance LK1The other end of the first full-bridge circuit is simultaneously connected with the positive input end of the fifth full-bridge circuit and the inductor L1One end of (1), transformer Tr2The negative pole input end of the fifth full-bridge circuit and the one end of inductance L2 are connected simultaneously to the first synonym end of secondary side, the positive pole of battery is connected simultaneously to the other end of inductance L1 and the other end of inductance L2, the positive pole output end of fifth full-bridge circuit connects the positive pole of electric capacity C1, the negative pole of battery and the negative pole output end of fifth full-bridge circuit are connected simultaneously to the negative pole of electric capacity C1, transformer Tr2The second homonymous terminal of the secondary side is connected with an inductor LK2One terminal of (1), inductance LK2The other end of the second full-bridge circuit is connected with the anode input end of the sixth full-bridge circuit and a transformer Tr2The second synonym end of the secondary side is connected with the negative electrode input end of the sixth full-bridge circuit, the positive electrode output end of the sixth full-bridge circuit is connected with the positive electrode of the super capacitor, and the negative electrode output end of the sixth full-bridge circuit is connected with the negative electrode of the super capacitor.
2. The home power energy router of claim 1, wherein the AC interface comprises at least 1 isolated bi-directional AC/DC converter;
each isolated bidirectional AC/DC converter comprises a capacitor CdThe single-phase full-bridge inverter circuit comprises a single-phase full-bridge inverter circuit, an inductor Lm, a first-order EMI filter and an isolation transformer;
capacitor CdThe positive pole of the capacitor C is simultaneously connected with the positive pole of the 360V direct current bus, the positive pole input end of the single-phase full-bridge inverter circuit and the capacitor CdThe negative pole of connecting 360V direct current generating line and single-phase full-bridge inverter circuit's negative pole input simultaneously, the one end of inductance Lm is connected to single-phase full-bridge inverter circuit's first output, the first input of first-order EMI wave filter is connected to the other end of inductance Lm, the second input of EMI wave filter is connected to full-bridge inverter circuit's second output, the primary side of isolation transformer is connected to the output of first-order EMI wave filter, alternating current network or outside power energy router are connected to isolation transformer's secondary side.
3. The home power energy router of claim 1, wherein the load interface comprises a unidirectional DC/DC converter, a 48V low voltage DC bus, and at least 1 unidirectional DC/AC converter;
the unidirectional DC/DC converter comprises a first full-bridge circuit, a second full-bridge circuit, and a transformer Tr1And a capacitance Ci;
the positive input end of the first full-bridge circuit is connected with the positive electrode of the 360V direct current bus, the negative input end of the first full-bridge circuit is connected with the negative electrode of the 360V direct current bus, and the positive output end of the first full-bridge circuit is connected with the transformer Tr1The homonymous terminal of the primary side and the negative output terminal of the first full-bridge circuit are connected with the transformer Tr1Primary side synonym terminal, transformer Tr1The dotted terminal of the secondary side is connected with the positive input terminal of the second full bridge circuit, and the transformer Tr1The synonym end of the secondary side is connected with the negative input end of a second full-bridge circuit, the positive output end of the second full-bridge circuit is simultaneously connected with one end of a capacitor Ci and the positive electrode of a 48V low-voltage direct-current bus, the negative output end of the second full-bridge circuit is simultaneously connected with the other end of the capacitor Ci and the negative electrode of the 48V low-voltage direct-current bus, and a direct-current load is hung on the 48V low-voltage direct-current bus;
each unidirectional DC/AC converter comprises a capacitor CtThe third full-bridge circuit, the inductor Ln and the first-order EMI filter;
capacitor CtThe positive pole of the capacitor C is simultaneously connected with the positive pole of the 360V direct current bus and the positive pole input end of the third full-bridge circuittThe negative pole of 360V direct current generating lines and the negative pole input of third full-bridge circuit are connected simultaneously, the one end of inductance Ln is connected to the first output of third full-bridge circuit, the first input of first-order EMI wave filter is connected to the other end of inductance Ln, the second input of first-order EMI wave filter is connected to the second output of third full-bridge circuit, and alternating current load is connected to the output of first-order EMI wave filter.
4. The home power energy router of claim 1, wherein the distributed power interface comprises at least one unidirectional DC/DC converter and at least one unidirectional AC/DC converter;
each unidirectional DC/DC converter includes a diode D1Diode D2Switch Sp1Switch Sp2Power inductor Lp1Power inductor Lp2Filter capacitor Cp1And a filter capacitor Cp2；
Cathode connection diode D of 360V direct current bus2Anode of (2), diode D2Cathode of the switch Sp2And a power inductor Lp2One end of (1), switch Sp2The other end of the filter is simultaneously connected with a filter capacitor Cp2And a diode D1Cathode of (2), diode D1Anode of the switch Sp1And a power inductor Lp1One terminal of (1), power inductance Lp1The other end of the filter is simultaneously connected with a filter capacitor Cp1And the negative electrode of the photovoltaic system, the power inductor Lp2Another terminal of (1), filter capacitor Cp2Another end of (1), switch Sp1Another terminal of (1), filter capacitor Cp1One end of the connecting rod and the anode of the 360V direct current bus are simultaneously connected with the anode of the photovoltaic system;
each unidirectional AC/DC converter comprises a capacitor CtThe full-bridge circuit, the inductor Ln and the first-order EMI filter;
capacitor CtThe positive pole of the capacitor C is simultaneously connected with the positive pole of the 360V direct current bus and the positive pole input end of the full bridge circuittThe negative pole of 360V direct current generating line and the negative pole input of full-bridge circuit are connected simultaneously, the one end of inductance Ln is connected to the first output of full-bridge circuit, the first input of first-order EMI wave filter is connected to the other end of inductance Ln, the second input of first-order EMI wave filter is connected to the second output of full-bridge circuit, wind power generation system is connected to the output of first-order EMI wave filter.
5. The home power energy router of claim 1, wherein the energy storage interface further comprises at least one unidirectional DC/DC converter;
each unidirectional DC/DC converter comprises a first full-bridge circuit, a second full-bridge circuit and a transformer Tr1And a capacitance Ci;
the positive input end of the first full-bridge circuit is connected with the positive electrode of the 360V direct current bus, the negative input end of the first full-bridge circuit is connected with the negative electrode of the 360V direct current bus, and the first full-bridge circuitThe positive output end of the circuit is connected with a transformer Tr1The homonymous terminal of the primary side and the negative output terminal of the first full-bridge circuit are connected with the transformer Tr1Primary side synonym terminal, transformer Tr1The dotted terminal of the secondary side is connected with the positive input terminal of the second full bridge circuit, and the transformer Tr1The synonym end of the secondary side is connected with the negative input end of the second full-bridge circuit, the positive output end of the second full-bridge circuit is simultaneously connected with one end of the capacitor Ci and the positive electrode of the equipment storage battery, and the negative output end of the second full-bridge circuit is simultaneously connected with the other end of the capacitor Ci and the negative electrode of the equipment storage battery.
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| CN113602100B (en) * | 2021-08-05 | 2023-06-02 | 贾晶艳 | Power supply system, method, storage medium and processor for magnetic levitation train |
| CN113725928B (en) * | 2021-08-30 | 2023-10-27 | 东北大学 | Household alternating current-direct current hybrid bidirectional electric energy interaction energy router and energy scheduling method |
| CN114006396A (en) * | 2021-11-05 | 2022-02-01 | 上海大周能源技术有限公司 | Electric energy router based on direct current coupling |
| CN114094581B (en) * | 2022-01-19 | 2022-04-08 | 深圳市暗能量电源有限公司 | Power supply system based on power line carrier communication and communication method thereof |
| CN117134401B (en) * | 2023-10-26 | 2024-02-27 | 浙江日风电气股份有限公司 | DC/DC converter for hydrogen fuel cell vehicle and hydrogen fuel cell vehicle |
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| CN102073325A (en) * | 2011-01-28 | 2011-05-25 | 华南农业大学 | Biaxial automatic tracking device and method for maximum power point of solar panel |
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| CN103986182A (en) * | 2014-01-21 | 2014-08-13 | 云南师范大学 | Photovoltaic grid connected system based on power line carrier communication |
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