CN104218840A  Microgrid energy storage topological inverter and method for operating same  Google Patents
Microgrid energy storage topological inverter and method for operating same Download PDFInfo
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 CN104218840A CN104218840A CN201410152144.9A CN201410152144A CN104218840A CN 104218840 A CN104218840 A CN 104218840A CN 201410152144 A CN201410152144 A CN 201410152144A CN 104218840 A CN104218840 A CN 104218840A
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 238000004146 energy storage Methods 0.000 title claims abstract description 42
 239000003990 capacitor Substances 0.000 claims abstract description 80
 230000000875 corresponding Effects 0.000 claims abstract description 14
 230000005611 electricity Effects 0.000 claims description 14
 238000007599 discharging Methods 0.000 claims description 12
 238000007667 floating Methods 0.000 claims description 6
 238000000844 transformation Methods 0.000 claims description 6
 230000001131 transforming Effects 0.000 claims description 6
 230000002457 bidirectional Effects 0.000 abstract 5
 238000002955 isolation Methods 0.000 abstract 2
 230000000694 effects Effects 0.000 abstract 1
 238000010586 diagram Methods 0.000 description 2
 238000005516 engineering process Methods 0.000 description 2
 WHXSMMKQMYFTQSUHFFFAOYSAN lithium Chemical compound [Li] WHXSMMKQMYFTQSUHFFFAOYSAN 0.000 description 1
 229910052744 lithium Inorganic materials 0.000 description 1
 238000000034 method Methods 0.000 description 1
 230000001172 regenerating Effects 0.000 description 1
 238000004088 simulation Methods 0.000 description 1
Abstract
The invention relates to a microgrid energy storage topological inverter and a method for operating the same. The microgrid energy storage topological inverter comprises a controller and an isolation transformer applicable to being connected with a threephase power source. Three output phases of the isolation transformer are respectively connected with a first fourquadrant Hbridge converter, a second fourquadrant Hbridge converter and a third fourquadrant Hbridge converter, directcurrent sides of the first fourquadrant Hbridge converter, the second fourquadrant Hbridge converter and the third fourquadrant Hbridge converter are connected with one another in parallel and then are connected with a first bidirectional DC/DC transducer and a second bidirectional DC/DC transducer, the first bidirectional DC/DC transducer is connected with a storage battery, and the second bidirectional DC/DC transducer is connected with a super capacitor. The microgrid energy storage topological inverter and the method have the advantages that the storage battery and the super capacitor can be respectively charged and discharged by the three fourquadrant Hbridge converters and the two bidirectional DC/DC transducers under the control of the controller, so that microgrid energy storage and feedback effects can be realized, and corresponding charge and discharge forms can be controlled according to charge and discharge characteristics of the storage battery and the super capacitor.
Description
Technical field
The present invention relates to a kind of inverter, particularly refer to a kind of microgrid energy storage topology inverter and method of work.
Background technology
Along with the old general layout of the centralized and unified formula of continuous increase electrical network of power load makes electrical network further fragile.Therefore need to increase distributed energy structure to improve the reliability of electrical network, ensure popular daily electricity consumption and industrial or agricultural electricity consumption etc.In addition; Distributed energy can realize energysaving consumptionreducing better, is conducive to utilization and the popularization of clean energy resource and regenerative resource.But when electric power system is broken down, distributed power source must be at once out of service.Which greatly limits giving full play to of distributed energy usefulness.For coordinating the contradiction between bulk power grid and distributed power source, there has been proposed the concept of microgrid.Microgrid forms the electric power system of load by distributed power source, distributed energy storage and energy management module, forms an independent controllable system, completely solve the contradiction between bulk power grid and distributed power source together with load.Energystorage system regulates micro battery performance, the important step of guaranteed load power supply quality.Existing energy storage inverter mostly adopts the topological structure of threephase inverter form, to severe threephase unbalanced load, controls complicated, realizes difficulty.
Summary of the invention
The object of this invention is to provide a kind of microgrid energy storage topology inverter, this inverter solves the even voltage harmonics of each fourquadrant H bridge current transformer DC side output to the technical problem of the impact of VD.
In order to solve the problems of the technologies described above, the invention provides a kind of microgrid energy storage topology inverter, comprise: the threephase output of controller, the isolating transformer being suitable for connecting three phase mains, this isolating transformer connects first, second, third fourquadrant H bridge current transformer respectively, first, second twoway DC/DC converter is connected with after the DC side parallel of described first, second, third fourquadrant H bridge current transformer, described first twoway DC/DC converter connects storage battery, and described second twoway DC/DC converter connects super capacitor.
The present invention also solves the technical problem of storage battery and super capacitor energystorage and feedback further.
In order to solve the problems of the technologies described above, on the basis of abovementioned microgrid energy storage topology inverter, described microgrid energy storage topology inverter also comprises: controller, under energy storage pattern, described controller controls each fourquadrant H bridge current transformer and respectively each cross streams electricity is transformed into corresponding direct current and inputs to described first, second twoway DC/DC converter, described controller is more respectively according to the power division storage battery of storage battery and super capacitor, the given value of current value of super capacitor and voltage given value, pass through storage battery, the given value of current value of super capacitor controls described first respectively, second twoway DC/DC converter is to storage battery, super capacitor carries out constant current charge, again according to storage battery, the voltage given value of super capacitor controls described first respectively, second twoway DC/DC converter is to storage battery, super capacitor carries out constant voltage charge, finally control first respectively again, second twoway DC/DC converter is to storage battery, super capacitor carries out floating charge, under feedback pattern, described controller is according to storage battery, the given value of current value of super capacitor controls described first respectively, second twoway DC/DC converter limits storage battery, the discharging current of super capacitor, storage battery, the discharging current of super capacitor is respectively through first, second twoway DC/DC circuit transformations is input to each fourquadrant H bridge current transformer after corresponding direct current, the direct current of input is transformed into each cross streams electricity and exports by each fourquadrant H bridge current transformer again.
Further, the input of described first, second, third fourquadrant H bridge current transformer is connected to first, second, third reactor and first, second, third filter capacitor, and the output of first, second twoway DC/DC converter described is connected to the 4th, the 5th reactor.
In order to solve the technical problem of described storage battery and super capacitor energystorage and feedback.
Present invention also offers the method for work of a kind of microgrid energy storage topology inverter, wherein, described microgrid energy storage topology inverter comprises: the threephase output of controller, the isolating transformer being suitable for connecting three phase mains, this isolating transformer connects first, second, third fourquadrant H bridge current transformer respectively, first, second twoway DC/DC converter is connected with after the DC side parallel of described first, second, third fourquadrant H bridge current transformer, described first twoway DC/DC converter connects storage battery, and described second twoway DC/DC converter connects super capacitor.
The method of work of described microgrid energy storage topology inverter, comprising:
Under energy storage pattern, described controller controls each fourquadrant H bridge current transformer and respectively each cross streams electricity is transformed into corresponding direct current and inputs to first, second twoway DC/DC converter described, described controller, more respectively according to storage battery and the power division storage battery of super capacitor, the given value of current value of super capacitor and voltage given value, controls first, second twoway DC/DC converter described respectively by the given value of current value of storage battery, super capacitor and carries out constant current charge to storage battery, super capacitor; Control first, second twoway DC/DC converter described respectively according to the voltage given value of storage battery, super capacitor again and constant voltage charge is carried out to storage battery, super capacitor, finally control first, second twoway DC/DC converter more respectively and floating charge is carried out to storage battery, super capacitor.
Under feedback pattern, described controller controls according to the given value of current value of storage battery, super capacitor the discharging current that first, second twoway DC/DC converter described limits storage battery, super capacitor respectively, the discharging current of storage battery, super capacitor inputs to each fourquadrant H bridge current transformer respectively after first, second twoway DC/DC circuit transformations is corresponding direct current, and the direct current of input is transformed into each cross streams electricity and exports by each fourquadrant H bridge current transformer again.
Technique scheme of the present invention has the following advantages compared to existing technology: (1) the present invention is by three fourquadrant H bridge current transformers, and two twoway DC/DC converters by controller control respectively to storage battery, super capacitor carry out discharge and recharge, to realize energy storage and the feedback of microgrid, and according to the feature of storage battery, super capacitor discharge and recharge, control corresponding discharge and recharge form; Three windings of (2) three independently fourquadrant H bridge current transformer and threephase transformers connect, and make every phase voltage, electric current and power can independent regulation, are convenient to the control of threephase balancing load; (3) fourquadrant H bridge current transformer DC side direct current connection altogether, compared with H bridge independent direct current, the even voltage harmonics of direct current component is just in time cancelled out each other, DC voltage stability, fluctuates without secondary.
Accompanying drawing explanation
In order to make content of the present invention be more likely to be clearly understood, below basis specific embodiment and by reference to the accompanying drawings, the present invention is further detailed explanation, wherein
Fig. 1 is the main circuit topological structure figure of microgrid energy storage of the present invention topology inverter;
Fig. 2 is the circuit diagram of fourquadrant H bridge current transformer of the present invention;
Fig. 3 is the circuit diagram of twoway DC/DC converter of the present invention.
Wherein, circuit breaker Q F1, isolating transformer T, the first fourquadrant H bridge current transformer A, the second fourquadrant H bridge current transformer B, the 3rd fourquadrant H bridge current transformer C, the first twoway DC/DC converter D, the second twoway DC/DC converter E, storage battery 1, super capacitor 2.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail:
Embodiment 1
See Fig. 1 to Fig. 3, a kind of microgrid energy storage topology inverter, comprise: the threephase output of circuit breaker Q F1, controller, the isolating transformer T being suitable for connecting three phase mains, this isolating transformer T connects first, second, third fourquadrant H bridge current transformer respectively, first, second twoway DC/DC converter is connected with after the DC side parallel of described first, second, third fourquadrant H bridge current transformer, described first twoway DC/DC converter connects storage battery 1, and described second twoway DC/DC converter connects super capacitor 2.
Described isolating transformer T monoaspect plays buffer action, raises input voltage on the other hand to improve back end DC busbar voltage, and the harmonic wave that filter civil power and transformer thereof bring.
Embodiment 2
In order to the feature according to storage battery and super capacitor discharge and recharge, namely super capacitor charging rate is faster than charge in batteries speed, on the basis of abovementioned microgrid energy storage topology inverter, described microgrid energy storage topology inverter also comprises: controller, namely control under first, second twoway DC/DC converter regulates energy storage and feedback pattern by described controller, to the discharge and recharge of storage battery 1 and super capacitor 2.
Concrete, under energy storage pattern, described controller controls each fourquadrant H bridge current transformer and respectively each cross streams electricity is transformed into corresponding direct current and inputs to first, second twoway DC/DC converter described, described controller, more respectively according to storage battery 1 and the power division storage battery of super capacitor 2, the given value of current value of super capacitor and voltage given value, controls first, second twoway DC/DC converter described respectively by the given value of current value of storage battery 1, super capacitor 2 and carries out constant current charge to storage battery 1, super capacitor 2; Control first, second twoway DC/DC converter described respectively according to the voltage given value of storage battery 1, super capacitor 2 again and constant voltage charge is carried out to storage battery 1, super capacitor 2, finally control first, second twoway DC/DC converter more respectively and floating charge is carried out to storage battery 1, super capacitor 2.
Under feedback pattern, described controller controls according to the given value of current value of storage battery 1, super capacitor 2 discharging current that first, second twoway DC/DC converter described limits storage battery 1, super capacitor 2 respectively, the discharging current of storage battery 1, super capacitor 2 inputs to each fourquadrant H bridge current transformer respectively after first, second twoway DC/DC circuit transformations is corresponding direct current, and the direct current of input is transformed into each cross streams electricity and exports by each fourquadrant H bridge current transformer again.
The input of described first, second, third fourquadrant H bridge current transformer is connected to first, second, third reactor and first, second, third filter capacitor, and the output of first, second twoway DC/DC converter described is connected to the 4th, the 5th reactor.
Wherein, described controller adopts the technical scheme of a kind of 100KVA microgrid energy storage two way convertor middle controller disclosed in Chinese patent literature CN 102055358 B; Middle controller of the present invention also can adopt EMS EMS to realize, and such as, in a kind of online load simulation method of power system disclosed in Chinese patent literature CN 101777765 B, has relevant discussion to EMS EMS.
Described storage battery adopts lithium battery.
Embodiment 3
In embodiment 1 and embodiment 2 basis, present invention also offers the method for work of a kind of microgrid energy storage topology inverter, wherein, described microgrid energy storage topology inverter comprises: controller, be suitable for the isolating transformer connecting three phase mains, the threephase of this isolating transformer exports and connects first respectively, second, 3rd fourquadrant H bridge current transformer, described first, second, first is connected with after the DC side parallel of the 3rd fourquadrant H bridge current transformer, second twoway DC/DC converter, described first twoway DC/DC converter connects storage battery 1, described second twoway DC/DC converter connects super capacitor 2.
The method of work of described microgrid energy storage topology inverter, comprising:
Under energy storage pattern, described controller controls each fourquadrant H bridge current transformer and respectively each cross streams electricity is transformed into corresponding direct current and inputs to first, second twoway DC/DC converter described, described controller, more respectively according to storage battery 1 and the power division storage battery 1 of super capacitor 2, the given value of current value of super capacitor 2 and voltage given value, controls first, second twoway DC/DC converter described respectively by the given value of current value of storage battery 1, super capacitor 2 and carries out constant current charge to storage battery 1, super capacitor 2; Control first, second twoway DC/DC converter described respectively according to the voltage given value of storage battery 1, super capacitor 2 again and constant voltage charge is carried out to storage battery 1, super capacitor 2, finally control first, second twoway DC/DC converter more respectively and floating charge is carried out to storage battery 1, super capacitor 2.
Under feedback pattern, described controller controls according to the given value of current value of storage battery 1, super capacitor 2 discharging current that first, second twoway DC/DC converter described limits storage battery 1, super capacitor 2 respectively, the discharging current of storage battery 1, super capacitor 2 inputs to each fourquadrant H bridge current transformer respectively after first, second twoway DC/DC circuit transformations is corresponding direct current, and the direct current of input is transformed into each cross streams electricity and exports by each fourquadrant H bridge current transformer again.
Obviously, abovedescribed embodiment is only for example of the present invention is clearly described, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all execution modes.And these belong to spirit institute's apparent change of extending out of the present invention or change and are still among protection scope of the present invention.
Claims (4)
1. a microgrid energy storage topology inverter, is characterized in that comprising: be suitable for connecting the isolating transformer of three phase mains, the threephase of this isolating transformer exports and connects first, second, third fourquadrant H bridge current transformer respectively,
Be connected with first, second twoway DC/DC converter after the DC side parallel of described first, second, third fourquadrant H bridge current transformer, described first twoway DC/DC converter connects storage battery, and described second twoway DC/DC converter connects super capacitor.
2. microgrid energy storage topology inverter according to claim 1, is characterized in that,
Described microgrid energy storage topology inverter also comprises: controller,
Under energy storage pattern, described controller controls each fourquadrant H bridge current transformer and respectively each cross streams electricity is transformed into corresponding direct current and inputs to first, second twoway DC/DC converter described, described controller, more respectively according to storage battery and the power division storage battery of super capacitor, the given value of current value of super capacitor and voltage given value, controls first, second twoway DC/DC converter described respectively by the given value of current value of storage battery, super capacitor and carries out constant current charge to storage battery, super capacitor; Control first, second twoway DC/DC converter described respectively according to the voltage given value of storage battery, super capacitor again and constant voltage charge is carried out to storage battery, super capacitor, finally control first, second twoway DC/DC converter more respectively and floating charge is carried out to storage battery, super capacitor;
Under feedback pattern, described controller controls according to the given value of current value of storage battery, super capacitor the discharging current that first, second twoway DC/DC converter described limits storage battery, super capacitor respectively, the discharging current of storage battery, super capacitor inputs to each fourquadrant H bridge current transformer respectively after first, second twoway DC/DC circuit transformations is corresponding direct current, and the direct current of input is transformed into each cross streams electricity and exports by each fourquadrant H bridge current transformer again.
3. microgrid energy storage topology inverter according to claim 1, it is characterized in that, the input of described first, second, third fourquadrant H bridge current transformer is connected to first, second, third reactor and first, second, third filter capacitor,
The output of first, second twoway DC/DC converter described is connected to the 4th, the 5th reactor.
4. a method of work for microgrid energy storage topology inverter, is characterized in that,
Described microgrid energy storage topology inverter comprises: the threephase output of controller, the isolating transformer being suitable for connecting three phase mains, this isolating transformer connects first, second, third fourquadrant H bridge current transformer respectively,
Be connected with first, second twoway DC/DC converter after the DC side parallel of described first, second, third fourquadrant H bridge current transformer, described first twoway DC/DC converter connects storage battery, and described second twoway DC/DC converter connects super capacitor;
The method of work of described microgrid energy storage topology inverter, comprising:
Under energy storage pattern, described controller controls each fourquadrant H bridge current transformer and respectively each cross streams electricity is transformed into corresponding direct current and inputs to first, second twoway DC/DC converter described, described controller, more respectively according to storage battery and the power division storage battery of super capacitor, the given value of current value of super capacitor and voltage given value, controls first, second twoway DC/DC converter described respectively by the given value of current value of storage battery, super capacitor and carries out constant current charge to storage battery, super capacitor; Control first, second twoway DC/DC converter described respectively according to the voltage given value of storage battery, super capacitor again and constant voltage charge is carried out to storage battery, super capacitor, finally control first, second twoway DC/DC converter more respectively and floating charge is carried out to storage battery, super capacitor;
Under feedback pattern, described controller controls according to the given value of current value of storage battery, super capacitor the discharging current that first, second twoway DC/DC converter described limits storage battery, super capacitor respectively, the discharging current of storage battery, super capacitor inputs to each fourquadrant H bridge current transformer respectively after first, second twoway DC/DC circuit transformations is corresponding direct current, and the direct current of input is transformed into each cross streams electricity and exports by each fourquadrant H bridge current transformer again.
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Cited By (6)
Publication number  Priority date  Publication date  Assignee  Title 

CN105141170A (en) *  20150918  20151209  江苏同芯电气科技有限公司  Long pulse large power high voltage power supply 
CN106208793A (en) *  20150430  20161207  深圳市健网科技有限公司  A kind of ACDC translation circuit and converting power source 
CN106505601A (en) *  20161102  20170315  广东电网有限责任公司电力科学研究院  A kind of intelligent load device and power transmission line intelligent load system 
CN110943469A (en) *  20191218  20200331  国网智能科技股份有限公司  Singlestage energy storage converter and control method thereof 
CN111030152A (en) *  20191218  20200417  国网智能科技股份有限公司  Energy storage converter system and control method thereof 
CN111585433A (en) *  20200507  20200825  国网重庆市电力公司电力科学研究院  Universal interface, control method and energy storage system 
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CN103267915A (en) *  20130513  20130828  周细文  Hbridge structure antiislanding detection test loading device 
CN203233315U (en) *  20130508  20131009  周细文  Alternating current power supply for simulating characteristics of power grid 
CN103490524A (en) *  20130916  20140101  江苏大学  Largescale hybrid energy storage system and control strategy thereof 

2014
 20140415 CN CN201410152144.9A patent/CN104218840A/en active Pending
Patent Citations (3)
Publication number  Priority date  Publication date  Assignee  Title 

CN203233315U (en) *  20130508  20131009  周细文  Alternating current power supply for simulating characteristics of power grid 
CN103267915A (en) *  20130513  20130828  周细文  Hbridge structure antiislanding detection test loading device 
CN103490524A (en) *  20130916  20140101  江苏大学  Largescale hybrid energy storage system and control strategy thereof 
Cited By (8)
Publication number  Priority date  Publication date  Assignee  Title 

CN106208793A (en) *  20150430  20161207  深圳市健网科技有限公司  A kind of ACDC translation circuit and converting power source 
CN105141170A (en) *  20150918  20151209  江苏同芯电气科技有限公司  Long pulse large power high voltage power supply 
CN106505601A (en) *  20161102  20170315  广东电网有限责任公司电力科学研究院  A kind of intelligent load device and power transmission line intelligent load system 
CN110943469A (en) *  20191218  20200331  国网智能科技股份有限公司  Singlestage energy storage converter and control method thereof 
CN111030152A (en) *  20191218  20200417  国网智能科技股份有限公司  Energy storage converter system and control method thereof 
CN110943469B (en) *  20191218  20211207  山东鲁软数字科技有限公司智慧能源分公司  Singlestage energy storage converter and control method thereof 
CN111585433A (en) *  20200507  20200825  国网重庆市电力公司电力科学研究院  Universal interface, control method and energy storage system 
CN111585433B (en) *  20200507  20220211  国网重庆市电力公司电力科学研究院  Universal interface, control method and energy storage system 
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