CN208174270U - A kind of micro-grid system - Google Patents
A kind of micro-grid system Download PDFInfo
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- CN208174270U CN208174270U CN201820281379.1U CN201820281379U CN208174270U CN 208174270 U CN208174270 U CN 208174270U CN 201820281379 U CN201820281379 U CN 201820281379U CN 208174270 U CN208174270 U CN 208174270U
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Abstract
The utility model embodiment proposes a kind of micro-grid system, which includes：Multiple micro-capacitance sensor subsystems, micro-capacitance sensor subsystem include：Direct-current grid and at least two flexible substations, flexible substation include：High-voltage alternating system, high-voltage direct current and low-voltage direct-current system are respectively connected between high-voltage alternating system and high-voltage direct current, between high-voltage direct current and low-voltage direct-current system, between high-voltage alternating system and low-voltage direct-current system；Direct-current grid includes：High voltage dc bus and low-voltage direct bus；Multiple micro-capacitance sensor subsystems interconnect cyclization by high voltage dc bus, high voltage dc bus is connect with high-voltage direct current, it is connected between the low-voltage direct-current system of each flexible substation in micro-capacitance sensor subsystem by low-voltage direct bus, it realizes load transfer and power flow of ring net is balanced, ensure that the continued power ability of power distribution network.
Description
Technical field
The utility model relates to flexible distribution technique fields, and in particular to a kind of micro-grid system.
Background technique
Power distribution network is in the end of electric system, is directly facing power consumer, carries the weight of distribution electric energy, services client
Appoint.
Currently, distribution network construction relatively lag behind, control measures it is limited, constrain power distribution network operation control flexibility, make
The problems such as unbalanced, the service restoration time is long at feeder load；On the other hand, non-linear, impact load ratio in power distribution network
The increase of weight and the continuous improvement of new energy permeability, propose the safeguard mean of distribution network electric energy quality and power supply reliability
Requirements at the higher level are gone out.Power distribution network is faced with power demand and customizes to be coordinated with diversification, distributed generation resource access scale, trend
Various huge challenges such as control from being complicated.
Existing power distribution network uses mechanical electric magnetic-type substation, when a certain section failure in power distribution network, due to other
Part is unable to get electric power support, will affect the normal operation of other parts, not can guarantee the continued power ability of power distribution network.
Utility model content
In view of above-mentioned analysis, the utility model embodiment proposes a kind of micro-grid system, to solve the prior art
Not the problem of not can guarantee the continued power ability of power distribution network.
To achieve the above object, the utility model embodiment adopts the following technical scheme that：
According in a first aspect, the utility model embodiment provides a kind of micro-grid system, which includes：It is more
A micro-capacitance sensor subsystem, micro-capacitance sensor subsystem include：Direct-current grid and at least two flexible substations；Flexible substation's packet
It includes：High-voltage alternating system, high-voltage direct current and low-voltage direct-current system, between high-voltage alternating system and high-voltage direct current, high
It is respectively connected between straightening streaming system and low-voltage direct-current system, between high-voltage alternating system and low-voltage direct-current system；DC micro-electric
Net includes：High voltage dc bus and low-voltage direct bus；Multiple micro-capacitance sensor subsystems interconnect cyclization by high voltage dc bus, high
Pressure DC bus is connect with high-voltage direct current, is led between the low-voltage direct-current system of each flexible substation in micro-capacitance sensor subsystem
Low-voltage direct bus is crossed to be connected.
With reference to first aspect, in first aspect first embodiment, flexible substation further includes：Low-voltage alternating-current system,
Low-voltage alternating-current system is connected with low-voltage direct-current system, and is connected by mechanical electric magnetic-type substation with high-voltage alternating system.
First embodiment with reference to first aspect, in first aspect second embodiment, above-mentioned high-voltage alternating system is set
It is equipped with first voltage conversion module, for High Level AC Voltage to be transformed to high voltage direct current, and High Level AC Voltage is transformed to
Low-voltage DC；High-voltage direct current is provided with second voltage conversion module, for high voltage direct current to be transformed to low-voltage direct
Electricity；Low-voltage direct-current system is provided with tertiary voltage conversion module, for low-voltage DC to be transformed to low-voltage AC；Low pressure is handed over
Streaming system is provided with the 4th voltage transformation module, for low-voltage AC to be transformed to low-voltage DC；Low-voltage direct-current system is set
It is equipped with the 5th voltage transformation module, for low-voltage DC to be transformed to high voltage direct current, and low-voltage DC is transformed to
High Level AC Voltage；High-voltage direct current is provided with the 6th voltage transformation module, for high voltage direct current to be transformed to high-voltage alternating
Electricity.
First embodiment or first aspect second embodiment with reference to first aspect, in first aspect third embodiment
In, High Level AC Voltage is transformed to low-voltage AC, low-voltage alternating-current system by mechanical electric magnetic-type substation by high-voltage alternating system
Low-voltage AC is transformed to High Level AC Voltage by mechanical electric magnetic-type substation.
With reference to first aspect, in the 4th embodiment of first aspect, direct-current grid further includes：DC power supply apparatus,
DC energy storage device and DC load；DC power supply apparatus accesses low-voltage direct bus by the first DC transformer, by low
Press DC bus that electric energy is transmitted to low-voltage direct-current system or DC energy storage system；DC energy storage device passes through the second DC conversion
Device accesses low-voltage direct bus, and the electric energy of low-voltage direct-current system or DC power supply apparatus transmission is received by low-voltage direct bus,
The electric energy that low-voltage direct-current system or DC power supply apparatus transmit is stored；When low-voltage direct-current system breaks down, direct current
Power supply unit or DC energy storage device transmit electric energy to DC load；DC load accesses low-pressure direct by third DC transformer
Bus is flowed, the electric energy of low-voltage direct-current system, DC power supply apparatus or the transmission of DC energy storage device is received by low-voltage direct bus.
4th embodiment with reference to first aspect, in the 5th embodiment of first aspect, above-mentioned DC power supply apparatus is
Photovoltaic power generation apparatus.
The 5th embodiment of 4th embodiment or first aspect with reference to first aspect, in first aspect sixth embodiment
In, above-mentioned DC energy storage device includes：Fixed energy storage device and mobile energy storage device.
With reference to first aspect, in the 7th embodiment of first aspect, above-mentioned micro-capacitance sensor subsystem further includes：Further include：
Micro-capacitance sensor is exchanged, exchange micro-capacitance sensor includes：High voltage AC bus, low-voltage alternating-current bus, AC power supply device, exchange energy storage device
And AC load；High voltage AC bus is connected with high-voltage alternating system, and High Level AC Voltage is transmitted to high-voltage alternating system；Exchange
Power supply unit accesses low-voltage alternating-current bus by the first AC convertor, and electric energy is transmitted to low pressure by low-voltage alternating-current bus and is handed over
Streaming system or exchange energy-storage system；It exchanges energy storage device and low-voltage alternating-current bus is accessed by the second AC convertor, receive low pressure
AC system or the electric energy of AC power supply device transmission, the electric energy that low-voltage alternating-current system or AC power supply device are transmitted is deposited
Storage；When low-voltage alternating-current system jam, AC power supply device or exchange energy storage device to AC load transmit electric energy；Exchange
Load accesses low-voltage alternating-current bus by third AC convertor, receives low-voltage alternating-current system, AC power supply device or exchange storage
The electric energy of energy device transmission.
7th embodiment with reference to first aspect, in the 8th embodiment of first aspect, above-mentioned AC power supply device is
Wind power generation plant.
Technical solutions of the utility model at least have the following advantages that compared with prior art：
The utility model embodiment proposes a kind of micro-grid system, which includes：Multiple micro-capacitance sensor subsystems
System, micro-capacitance sensor subsystem include：Direct-current grid and at least two flexible substations, flexible substation include：High-voltage alternating system
System, high-voltage direct current and low-voltage direct-current system, between high-voltage alternating system and high-voltage direct current, high-voltage direct current with it is low
It is respectively connected between straightening streaming system, between high-voltage alternating system and low-voltage direct-current system；Direct-current grid includes：High voltage direct current
Bus and low-voltage direct bus；Multiple micro-capacitance sensor subsystems interconnect cyclization, high voltage dc bus and height by high voltage dc bus
Straightening streaming system connects, and passes through low-voltage direct bus between the low-voltage direct-current system of each flexible substation in micro-capacitance sensor subsystem
It is connected.The micro-grid system that the utility model embodiment proposes is by handing over the high pressure of the flexible substation in micro-capacitance sensor subsystem
Streaming system, high-voltage direct current and low-voltage direct-current system interconnection cyclization, and pass through high voltage dc bus for each micro-capacitance sensor subsystem
Connection is connected the low-voltage direct-current system of each flexible substation in micro-capacitance sensor subsystem by low-voltage direct bus, thus micro-
Each micro-capacitance sensor subsystem mutual backup in network system, flexible substation's mutual backup in each micro-capacitance sensor subsystem, when micro-
When one or several micro-capacitance sensor subsystems in network system break down, in addition to the micro-capacitance sensor subsystem of failure,
Other micro-capacitance sensor subsystems work normally, when one or several flexible substations in micro-capacitance sensor subsystem break down,
In addition to the flexible substation of failure, other flexible substations are worked normally, and realize load transfer and power flow of ring net is equal
Weighing apparatus, ensure that the continued power ability of power distribution network.
Detailed description of the invention
It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art
Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below
In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art
Under the premise of labour, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the schematic diagram of a specific example of micro-grid system in the utility model embodiment；
Fig. 2 is the schematic diagram of another specific example of micro-grid system in the utility model embodiment；
Fig. 3 is the schematic diagram of a specific example of micro-capacitance sensor subsystem in the utility model embodiment.
Specific embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described
Embodiment is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, originally
Field those of ordinary skill every other embodiment obtained without making creative work belongs to practical
Novel protected range.
In the description of the present invention, it should be noted that term " first ", " second ", " third " etc. are only used for retouching
Purpose is stated, relative importance is not understood to indicate or imply.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " connected "
It shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can also be two elements indirectly connected through an intermediary
Internal connection, can be wireless connection, is also possible to wired connection.It for the ordinary skill in the art, can be with
The concrete meaning of above-mentioned term in the present invention is understood as the case may be.
In addition, as long as technical characteristic involved in the utility model different embodiments disclosed below is each other
Not constituting conflict can be combined with each other.
The utility model embodiment provides a kind of micro-grid system, as shown in Figure 1, the micro-grid system includes：It is multiple
Micro-capacitance sensor subsystem, micro-capacitance sensor subsystem include：Direct-current grid 1 and at least two flexible substations 2, the flexibility substation 2
Including：High-voltage alternating system 21, high-voltage direct current 22 and low-voltage direct-current system 23, wherein high-voltage alternating system 21 and high pressure
Between direct current system 22, between high-voltage direct current 22 and low-voltage direct-current system 23, high-voltage alternating system 21 and low-voltage direct system
It is respectively connected between system 23；The direct-current grid 1 includes：High voltage dc bus 11 and low-voltage direct bus 12；Multiple micro-capacitance sensors
Subsystem interconnects cyclization by high voltage dc bus 11, and high voltage dc bus 11 is connect with high-voltage direct current 22, micro-capacitance sensor
It is connected between the low-voltage direct-current system 23 of each flexible substation 2 in system by low-voltage direct bus 12.
The micro-grid system that the utility model embodiment proposes is by by the height of the flexible substation 2 in micro-capacitance sensor subsystem
Pressure AC system 21, high-voltage direct current 22 and low-voltage direct-current system 23 interconnect cyclization, and will be each by high voltage dc bus 11
The connection of micro-capacitance sensor subsystem is connected the low-voltage direct-current system 23 of each flexible substation 2 by low-voltage direct bus 12, thus micro-
Each micro-capacitance sensor subsystem mutual backup in network system, 2 mutual backup of flexible substation in each micro-capacitance sensor subsystem, when micro-
When one or several micro-capacitance sensor subsystems in network system break down, in addition to the micro-capacitance sensor subsystem of failure,
Other micro-capacitance sensor subsystems still are able to keep working normally, and the micro-capacitance sensor subsystem worked normally can pass through high voltage dc bus
The 11 micro-capacitance sensor subsystem to break down provides electric power support, when one or several flexible power transformations in micro-capacitance sensor subsystem
2 are stood when breaking down, in addition to the flexible substation 2 of failure, other flexible substations 2 still are able to keep working normally,
And the flexible substation 2 worked normally can be that the flexible substation 2 broken down provides electric power branch by low-voltage direct bus 12
It holds, so that entire micro-grid system realizes load transfer and power flow of ring net is balanced, ensure that the continued power ability of power distribution network.
In a particular embodiment, multiple micro-capacitance sensor subsystems interconnect cyclization by high voltage dc bus 11, can be and pass through
It is any in high-voltage direct current 22 in any two flexibility substation 2 and adjacent micro-capacitance sensor subsystem in micro-capacitance sensor subsystem
High-voltage direct current 22 in two flexible substations 2 is respectively connected with, thus contacted being established between micro-capacitance sensor subsystem, it will be more
A micro-capacitance sensor subsystem interconnection cyclization.
As shown in Figures 2 and 3, in a preferred embodiment, above-mentioned flexible substation 2 further includes：Low-voltage alternating-current system 24,
Low-voltage alternating-current system 24 is connected with low-voltage direct-current system 23, and passes through mechanical electric magnetic-type substation 4 and 21 phase of high-voltage alternating system
Even.High Level AC Voltage is transformed to by high-voltage alternating system 21 by being set to the first voltage conversion module of high-voltage alternating system 21
High voltage direct current is sent to high-voltage direct current 22, and passes through the first voltage conversion module for high pressure by high voltage direct current
Convert alternating current is low-voltage DC, and low-voltage DC is sent to low-voltage direct-current system 23；High-voltage direct current 22 is by setting
High voltage direct current is transformed to low-voltage DC by the second voltage conversion module for being placed in high-voltage direct current 22, by low-voltage DC
It is sent to low-voltage direct-current system 23；Low-voltage direct-current system 23 is by being set to the tertiary voltage conversion module of low-voltage direct-current system 23
Low-voltage DC is transformed to low-voltage AC, low-voltage AC is sent to low-voltage alternating-current system 24；Low-voltage alternating-current system 24
Low-voltage AC is transformed to low-voltage DC by the 4th voltage transformation module by being set to low-voltage alternating-current system 24, by low pressure
Direct current is sent to low-voltage direct-current system 23；Low-voltage direct-current system 23 is become by being set to the 5th voltage of low-voltage direct-current system 23
It changes the mold block and low-voltage DC is transformed to high voltage direct current, high voltage direct current is sent to high-voltage direct current 22, and will be low
Straightening galvanic electricity is transformed to High Level AC Voltage, and High Level AC Voltage is sent to high-voltage alternating system 21；High-voltage direct current 22 passes through
High voltage direct current is transformed to High Level AC Voltage by the 6th voltage transformation module for being set to high-voltage direct current 22, by high-voltage alternating
Electricity is sent to high-voltage alternating system 21.Flexible substation 2 in the utility model embodiment uses modularized design, high-voltage alternating
System 21, high-voltage direct current 22, low-voltage direct-current system 23 and low-voltage alternating-current system 24 are belonging respectively to a module, each module
It can independently be overhauled when other modules work normally.
As shown in Figures 2 and 3, optionally, in the other embodiments of the utility model, high-voltage alternating system 21 passes through machine
High Level AC Voltage is transformed to low-voltage AC by tool electromagnetic type substation 4, and low-voltage AC is sent to low-voltage alternating-current system 24；
Low-voltage AC is transformed to High Level AC Voltage by mechanical electric magnetic-type substation 4 by low-voltage alternating-current system 24, by High Level AC Voltage
It is sent to high-voltage alternating system 21.
It should be noted that Fig. 1 and Fig. 2 illustrate only the situation that micro-grid system includes three micro-capacitance sensor subsystems,
In practical application, according to actual needs, micro-grid system may also comprise two or more micro-capacitance sensor subsystems, and (multiple herein is big
In three), the utility model is not limited.
In one embodiment, the high voltage dc bus 11 in above-mentioned direct-current grid 1 is 10kV DC bus, above-mentioned low pressure
DC bus 12 is 750V DC bus, and direct-current grid 1 further includes：DC power supply apparatus 13, DC energy storage device 14 and straight
Stream load 15；DC power supply apparatus 13 accesses low-voltage direct bus 12 by the first DC transformer, passes through low-voltage direct bus
Electric energy is transmitted to low-voltage direct-current system 23 or DC energy storage device 14 by 12；DC energy storage device 14 passes through the second DC transformer
Low-voltage direct bus 12 is accessed, is transmitted by the reception low-voltage direct-current system 23 of low-voltage direct bus 12 or DC power supply apparatus 13
Electric energy stores the electric energy that low-voltage direct-current system 23 or DC power supply apparatus 13 transmit；When low-voltage direct-current system 23 occurs
When failure, DC power supply apparatus 13 or DC energy storage device 14 transmit electric energy to DC load 15；DC load 15 passes through third
DC transformer accesses low-voltage direct bus 12, receives low-voltage direct-current system 23 by low-voltage direct bus 12, direct current supply fills
Set the electric energy of 13 or the transmission of DC energy storage device 14.
In a particular embodiment, above-mentioned DC power supply apparatus 13 can be photovoltaic power generation apparatus, above-mentioned first DC conversion
Device is direct current supply current transformer (DC/DC), and photovoltaic power generation apparatus accesses above-mentioned low-voltage direct bus by direct current supply current transformer
12；Above-mentioned DC energy storage device 14 includes energy-storage battery group, and above-mentioned second DC transformer is DC energy storage current transformer (DC/
DC), which is bidirectional converter, and energy-storage battery group accesses above-mentioned low-voltage direct by DC energy storage current transformer
Bus 12, DC energy storage current transformer are able to carry out the DC charging or direct-current discharge of energy-storage battery group, and DC energy storage device 14 can
To be fixed energy storage device, it is also possible to mobile energy storage device, such as mobile energy storage vehicle, dress of the mobile energy storage vehicle as standby energy storage
It sets, carries out energy supply in the regulating power deficiency of fixed energy storage device, ensured the power supply reliability of important load, and have
The intermittent electric power of effect consumption photovoltaic power generation apparatus, improves the economy of micro-grid system；Above-mentioned DC load 15 includes electricity
Electrical automobile direct-current charging post, above-mentioned third DC transformer are electric car direct current charge-discharge current transformer (DC/DC), electric car
Direct current charge-discharge current transformer is bidirectional converter, and electric car direct-current charging post is connect by electric car direct current charge-discharge current transformer
Enter above-mentioned low-voltage direct bus 12, electric car direct current charge-discharge current transformer be able to carry out batteries of electric automobile DC charging or
Direct-current discharge, optionally, above-mentioned DC load 15 can also be other important loads or common load.
As shown in figure 3, above-mentioned micro-capacitance sensor subsystem further includes：Micro-capacitance sensor 3 is exchanged, which includes：High pressure is handed over
Bus 31, low-voltage alternating-current bus 32, AC power supply device 33, exchange energy storage device 34 and AC load 35 are flowed, high-voltage alternating is female
Line 31 is 10kV ac bus, and low-voltage alternating-current bus 32 is 380V ac bus.High voltage AC bus 31 and high-voltage alternating system
21 are connected, and High Level AC Voltage is transmitted to high-voltage alternating system 21；AC power supply device 33 is accessed by the first AC convertor
Electric energy is transmitted to low-voltage alternating-current system 24 or exchange energy-storage system 34 by low-voltage alternating-current bus 32 by low-voltage alternating-current bus 32；
It exchanges energy storage device 34 and low-voltage alternating-current bus 32 is accessed by the second AC convertor, receive low-voltage alternating-current system 24 or exchange supplies
The electric energy that electric installation 33 transmits, the electric energy that low-voltage alternating-current system 24 or AC power supply device 33 are transmitted is stored；Work as low pressure
When AC system 24 breaks down, AC power supply device 33 or exchange energy storage device 34 to AC load 35 transmit electric energy；Exchange
Load 35 accesses low-voltage alternating-current bus 32 by third AC convertor, receives low-voltage alternating-current system 24, AC power supply device 33
Or the electric energy that exchange energy storage device 34 transmits.Exchange micro-capacitance sensor 3 makes full use of distributed energy (AC power supply device 33) in electricity
Continued power ability under net fault condition, improves the power supply reliability of micro-grid system, have island operating capacity and from
More property is high.
It should be noted that Fig. 3 illustrates only the situation that micro-capacitance sensor subsystem includes two flexible substations, actually answering
In, according to actual needs, micro-capacitance sensor subsystem may include multiple flexible substations (multiple for more than or equal to two herein),
The utility model is not limited.
In a particular embodiment, above-mentioned AC power supply device 33 can be wind power generation plant, above-mentioned first AC conversion
Device is Alternating Current Power Supply current transformer (AC/AC), and AC power supply device accesses above-mentioned low-voltage alternating-current bus by Alternating Current Power Supply current transformer
32；Above-mentioned second AC convertor is exchange energy accumulation current converter (AC/AC), which is bidirectional converter, is handed over
It flows energy storage device 34 and above-mentioned low-voltage alternating-current bus 32 is accessed by exchange energy accumulation current converter, exchange energy storage device 34 can be fixation
Energy storage device is also possible to mobile energy storage device, such as mobile energy storage vehicle, device of the mobile energy storage vehicle as standby energy storage, solid
Determine to carry out energy supply when the regulating power deficiency of energy storage device, has ensured the power supply reliability of important load；Above-mentioned exchange is negative
Lotus 35 includes electric vehicle alternating-current charging pile, at this point, above-mentioned third AC convertor is Electric Vehicle's Alternating charge and discharge electric converter
(AC/AC), Electric Vehicle's Alternating charge and discharge electric converter is bidirectional converter, and electric vehicle alternating-current charging pile is handed over by electric car
It flows charge and discharge electric converter and accesses above-mentioned low-voltage alternating-current bus 32, Electric Vehicle's Alternating charge and discharge electric converter is able to carry out electric car
The AC charging of battery or alternating current discharge, optionally, AC load 35 can also be other important loads or common load.
In a preferred embodiment, direct-current grid 1 can pass through above-mentioned first DC transformer with micro-capacitance sensor 3 is exchanged respectively
It realizes to third DC transformer and the first AC convertor to the current transformer valve of third AC convertor to the fast of fault current
Speed locking, thus cutting and isolated fault electric current.
In a preferred embodiment, above-mentioned high-voltage alternating system 21, high-voltage direct current 22, low-voltage direct-current system 23 and low
Pressure AC system 24 is respectively arranged with high-voltage alternating interface (10kV/AC), high voltage direct current interface (10kV/DC), low-voltage direct and connects
Mouth (750V/DC) and low-voltage alternating-current interface (380V/AC), high voltage AC bus 31 are connected by high-voltage alternating interface (10kV/AC)
High-voltage alternating system 21 is connect, high voltage dc bus 11 connects high-voltage direct current 22 by high voltage direct current interface (10kV/DC), low
DC bus 12 is pressed to connect low-voltage direct-current system 23 by low-voltage direct interface (750V/DC), low-voltage alternating-current bus 32 passes through low
Pressure exchange interface (380V/AC) connects low-voltage alternating-current system 24.
The interface that above-mentioned direct-current grid 1 passes through flexible substation 2 realize with the energy flow that exchanges micro-capacitance sensor 3, specifically
Direct current energy is transmitted to flexible substation 2 by high voltage direct current interface or low-voltage direct interface by ground, direct-current grid 1, flexible
Substation 2 realizes the conversion of electric energy direct current to exchange by internal each system, then passes through high-voltage alternating interface or low-voltage alternating-current
AC energy is transmitted to exchange micro-capacitance sensor 3 by interface, alternatively, exchange micro-capacitance sensor 3 is connect by high-voltage alternating interface or low-voltage alternating-current
AC energy is transmitted to flexible substation 2 by mouth, and flexible substation 2 realizes turning for electric energy AC-to DC by internal each system
It changes, direct current energy is then transmitted to by direct-current grid 1 by high voltage direct current interface or low-voltage direct interface.By the process,
It realizes direct-current grid 1 and exchanges the energy flow between micro-capacitance sensor 3, so that DC power supply apparatus 13 can be by itself
The electric energy of generation passes through flexible substation 2 and is delivered in exchange micro-capacitance sensor 3, and DC energy storage device 14 also can be by remaining electric energy
It is delivered in exchange micro-capacitance sensor 3 by flexible substation 2, the electric energy that itself is generated can be passed through flexibility by AC power supply device 33
Substation 2 is delivered in direct-current grid 1, and it is defeated that remaining electric energy can also be passed through flexible substation 2 by exchange energy storage device 34
It send into direct-current grid 1, improves the flexibility of micro-capacitance sensor subsystem.
Micro-grid system provided by the embodiment of the utility model, using based on flexible substation 2 looped network and alternating current-direct current it is mutual
Apotype structure realizes the flexible access of distributed energy, alternating current-direct current diversification load, promote distributed energy with it is renewable
The extensive access of the energy is realized to the highly reliable supply of load various energy resources form and the consumption of renewable energy 100%,
It realizes 100% consumption of the energy and meets >=99.99% power supply reliability, realize different voltages grade, different service areas
The Fault Isolation in domain improves the reliability of micro-grid system, and alternating voltage can only be provided, supply by efficiently solving existing power distribution network
The single problem of power mode improves the flexibility and controllability of power distribution network；Flexible substation in micro-capacitance sensor subsystem has
The functions such as network reconfiguration and self-healing, alternating current-direct current classification power supply and load control system, renewable energy " plug and play "；Flexible substation
In high-voltage alternating system and high-voltage direct current between, between high-voltage alternating system and low-voltage direct-current system, high voltage direct current system
It can be realized to and fro flow of power between system and low-voltage direct-current system, between low-voltage direct-current system and low-voltage alternating-current system.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or
It changes among the protection scope created still in the utility model.
Claims (9)
1. a kind of micro-grid system, which is characterized in that including：Multiple micro-capacitance sensor subsystems, the micro-capacitance sensor subsystem include：Directly
Flow micro-capacitance sensor and at least two flexible substations；
It is described flexibility substation include：High-voltage alternating system, high-voltage direct current and low-voltage direct-current system, the high-voltage alternating system
Between system and high-voltage direct current, between the high-voltage direct current and low-voltage direct-current system, the high-voltage alternating system with it is low
It is respectively connected between straightening streaming system；
The direct-current grid includes：High voltage dc bus and low-voltage direct bus；
The multiple micro-capacitance sensor subsystem interconnects cyclization, the high voltage dc bus and the high straightening by high voltage dc bus
Streaming system connects, and passes through the low pressure between the low-voltage direct-current system of each flexible substation in the micro-capacitance sensor subsystem
DC bus is connected.
2. micro-grid system according to claim 1, which is characterized in that it is described flexibility substation further include：Low-voltage alternating-current
System, the low-voltage alternating-current system are connected with the low-voltage direct-current system, and pass through mechanical electric magnetic-type substation and the high pressure
AC system is connected.
3. micro-grid system according to claim 2, which is characterized in that the high-voltage alternating system is provided with first voltage
The High Level AC Voltage for High Level AC Voltage to be transformed to high voltage direct current, and is transformed to low-voltage direct by conversion module
Electricity；
The high-voltage direct current is provided with second voltage conversion module, for the high voltage direct current to be transformed to low-voltage direct
Electricity；
The low-voltage direct-current system is provided with tertiary voltage conversion module, for the low-voltage DC to be transformed to low-voltage alternating-current
Electricity；
The low-voltage alternating-current system is provided with the 4th voltage transformation module, for low-voltage AC to be transformed to low-voltage DC；
The low-voltage direct-current system is provided with the 5th voltage transformation module, for the low-voltage DC to be transformed to high voltage direct current
Electricity, and the low-voltage DC is transformed to High Level AC Voltage；
The high-voltage direct current is provided with the 6th voltage transformation module, for the high voltage direct current to be transformed to high-voltage alternating
Electricity.
4. micro-grid system according to claim 2 or 3, which is characterized in that the high-voltage alternating system passes through the machine
High Level AC Voltage is transformed to low-voltage AC by tool electromagnetic type substation, and the low-voltage alternating-current system passes through the mechanical electric magnetic-type
Low-voltage AC is transformed to High Level AC Voltage by substation.
5. micro-grid system according to claim 1, which is characterized in that the direct-current grid further includes：Direct current supply
Device, DC energy storage device and DC load；
The DC power supply apparatus accesses the low-voltage direct bus by the first DC transformer, female by the low-voltage direct
Electric energy is transmitted to the low-voltage direct-current system or DC energy storage system by line；
The DC energy storage device accesses the low-voltage direct bus by the second DC transformer, female by the low-voltage direct
Line receives the electric energy of the low-voltage direct-current system or DC power supply apparatus transmission, and the low-voltage direct-current system or direct current supply are filled
The electric energy for setting transmission is stored；
When the low-voltage direct-current system breaks down, the DC power supply apparatus or DC energy storage device are to the DC load
Transmit electric energy；
The DC load accesses the low-voltage direct bus by third DC transformer, is connect by the low-voltage direct bus
Receive the electric energy of the low-voltage direct-current system, DC power supply apparatus or the transmission of DC energy storage device.
6. micro-grid system according to claim 5, which is characterized in that the DC power supply apparatus is photovoltaic power generation dress
It sets.
7. micro-grid system according to claim 5 or 6, which is characterized in that the DC energy storage device includes：Fixed storage
It can device and mobile energy storage device.
8. micro-grid system according to claim 2, which is characterized in that the micro-capacitance sensor subsystem further includes：It exchanges micro-
Power grid, the exchange micro-capacitance sensor include：High voltage AC bus, low-voltage alternating-current bus, AC power supply device, exchange energy storage device and
AC load；
The high voltage AC bus is connected with the high-voltage alternating system, and High Level AC Voltage is transmitted to the high-voltage alternating system
System；
The AC power supply device accesses the low-voltage alternating-current bus by the first AC convertor, female by the low-voltage alternating-current
Electric energy is transmitted to the low-voltage alternating-current system or exchange energy storage device by line；
The exchange energy storage device accesses the low-voltage alternating-current bus by the second AC convertor, receives the low-voltage alternating-current system
System or the electric energy of AC power supply device transmission, the electric energy that the low-voltage alternating-current system or AC power supply device are transmitted is deposited
Storage；
When the low-voltage alternating-current system jam, the AC power supply device or exchange energy storage device are to the AC load
Transmit electric energy；
The AC load accesses the low-voltage alternating-current bus by third AC convertor, receive the low-voltage alternating-current system,
AC power supply device or the electric energy of exchange energy storage device transmission.
9. micro-grid system according to claim 8, which is characterized in that the AC power supply device is wind-power electricity generation dress
It sets.
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| CN108321805B (en) * | 2018-02-28 | 2023-11-14 | 全球能源互联网研究院有限公司 | Micro-grid system |
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