CN108418207A - A kind of alternating current-direct current mixing micro-capacitance sensor system - Google Patents
A kind of alternating current-direct current mixing micro-capacitance sensor system Download PDFInfo
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- CN108418207A CN108418207A CN201810166408.4A CN201810166408A CN108418207A CN 108418207 A CN108418207 A CN 108418207A CN 201810166408 A CN201810166408 A CN 201810166408A CN 108418207 A CN108418207 A CN 108418207A
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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
- H02J3/007—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources
- H02J3/0073—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources for providing alternative feeding paths between load and source when the main path fails, e.g. transformers, busbars
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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
- H02J3/04—Circuit arrangements for ac mains or ac distribution networks for connecting networks of the same frequency but supplied from different sources
- H02J3/06—Controlling transfer of power between connected networks; Controlling sharing of load between connected networks
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The embodiment of the present invention proposes a kind of alternating current-direct current mixing micro-capacitance sensor system, which includes：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, and direct-current grid includes：High voltage dc bus and low-voltage direct busbar, it is connected by high voltage dc bus between the high-voltage direct current of each flexibility substation, it is connected by low-voltage direct busbar between the low-voltage direct-current system of each flexibility substation, 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 present invention relates to flexible distribution technique fields, and in particular to a kind of alternating current-direct current mixing micro-capacitance sensor system.
Background technology
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 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, carry the Means of Ensuring 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 matching
Other parts in power grid are unable to get electric power support, can influence the normal operation of other parts, can not ensure holding for power distribution network
Continuous power supply capacity.
Invention content
In view of above-mentioned analysis, the embodiment of the present invention proposes a kind of alternating current-direct current mixing micro-capacitance sensor system, existing to solve
There is the problem of continued power ability that technology can not can not ensure power distribution network.
To achieve the above object, the embodiment of the present invention adopts the following technical scheme that：
According in a first aspect, an embodiment of the present invention provides a kind of alternating current-direct current mixing micro-capacitance sensor system, which mixes
Micro-grid system includes：Direct-current grid and at least two flexible substations；Flexible substation includes：High-voltage alternating system, height
Straightening streaming system and low-voltage direct-current system, between high-voltage alternating system and high-voltage direct current, high-voltage direct current and low-pressure direct
It is respectively connected between streaming system, between high-voltage alternating system and low-voltage direct-current system；Direct-current grid includes：High voltage dc bus
With low-voltage direct busbar；It is connected by high voltage dc bus between the high-voltage direct current of each flexibility substation, each flexibility power transformation
It is connected by low-voltage direct busbar between the low-voltage direct-current system stood.
With reference to first aspect, in first aspect first embodiment, above-mentioned flexibility substation further includes：Low-voltage alternating-current system
System, low-voltage alternating-current system is connected with low-voltage direct-current system, and is connected with high-voltage alternating system by mechanical electric magnetic-type substation.
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 high-voltage alternating system by mechanical electric magnetic-type substation
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, above-mentioned direct-current grid further includes：Direct current supply fills
It sets, DC energy storage device and DC load；DC power supply apparatus accesses low-voltage direct busbar by the first DC transformer, passes through
Electric energy is transmitted to low-voltage direct-current system or DC energy storage system by low-voltage direct busbar；DC energy storage device is become by the second direct current
It flows device and accesses low-voltage direct busbar, low-voltage direct-current system or the electricity of DC power supply apparatus transmission are received by low-voltage direct busbar
Can, 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, directly
Stream transmits electric energy for electric installation or DC energy storage device to DC load；DC load accesses low pressure by third DC transformer
DC bus receives the electricity of low-voltage direct-current system, DC power supply apparatus or the transmission of DC energy storage device by low-voltage direct busbar
Energy.
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 alternating current-direct current mixing micro-capacitance sensor system further includes：
Micro-capacitance sensor is exchanged, exchange micro-capacitance sensor includes：High voltage AC bus, low-voltage alternating-current busbar, 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
Low-voltage alternating-current busbar is accessed by the first AC convertor for electric installation, electric energy, which is transmitted to low pressure, by low-voltage alternating-current busbar hands over
Streaming system or exchange energy-storage system；It exchanges energy storage device and low-voltage alternating-current busbar 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 transmit electric energy to AC load；Exchange
Load accesses low-voltage alternating-current busbar 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 solution of the present invention at least has the following advantages that compared with prior art：
The embodiment of the present invention proposes a kind of alternating current-direct current mixing micro-capacitance sensor system, the alternating current-direct current mixing micro-capacitance sensor system packet
It includes：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, between high-voltage alternating system and high-voltage direct current, between high-voltage direct current and low-voltage direct-current system, it is high
It is respectively connected between pressure AC system and low-voltage direct-current system, above-mentioned direct-current grid includes：High voltage dc bus and low-pressure direct
Busbar is flowed, is connected by high voltage dc bus between the high-voltage direct current of each flexibility substation, the low pressure of each flexibility substation
It is connected by low-voltage direct busbar between straight-flow system.The embodiment of the present invention propose alternating current-direct current mixing micro-capacitance sensor system pass through by
High-voltage alternating system, high-voltage direct current and the low-voltage direct-current system interconnection cyclization of flexible substation, and pass through high voltage direct current mother
Line connects the high-voltage direct current of each flexible substation, by low-voltage direct busbar by the low-voltage direct system of each flexible substation
System connection, to form the bicyclic web frame of both-end based on flexible substation, each flexibility substation is spare each other, when alternating current-direct current is mixed
When closing one or several flexible substations' failures in micro-grid system, in addition to the flexible substation of failure,
Other flexible substation's normal works, realize load transfer and power flow of ring net are balanced, ensure that the continued power energy of power distribution network
Power.
Description of the drawings
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, in being described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, other drawings may also be obtained based on these drawings.
Fig. 1 is the schematic diagram of a specific example of alternating current-direct current mixing micro-capacitance sensor system in the embodiment of the present invention；
Fig. 2 is the schematic diagram of another specific example of alternating current-direct current mixing micro-capacitance sensor system in the embodiment of the present invention.
Specific implementation mode
Technical scheme of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
The every other embodiment that personnel are obtained without making creative work, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that term " first ", " second ", " third " etc. are only used for description mesh
, it is not understood to indicate or imply relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " connected " should be done
It broadly understood, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；Can be mechanical connection,
It can also be electrical connection；It can be directly connected, can also can also be inside two elements indirectly connected through an intermediary
Connection, can be wirelessly connected, can also be wired connection.It for the ordinary skill in the art, can basis
Concrete condition understands the concrete meaning of above-mentioned term in the present invention.
As long as in addition, technical characteristic involved in invention described below different embodiments non-structure each other
It can be combined with each other at conflict.
An embodiment of the present invention provides a kind of alternating current-direct current mixing micro-capacitance sensor systems, as shown in Figure 1, the alternating current-direct current mixes micro- electricity
Net system includes：Direct-current grid 1 and at least two flexible substations 2, the flexibility substation 2 include：High-voltage alternating system 21,
High-voltage direct current 22 and low-voltage direct-current system 23, wherein between high-voltage alternating system 21 and high-voltage direct current 22, high straightening
It is respectively connected between streaming system 22 and low-voltage direct-current system 23, between high-voltage alternating system 21 and low-voltage direct-current system 23, this is straight
Flowing micro-capacitance sensor 1 includes：High voltage dc bus 11 and low-voltage direct busbar 12.The high-voltage direct current 22 of each flexibility substation 2 it
Between be connected by high voltage dc bus 11, pass through low-voltage direct busbar 12 between the low-voltage direct-current system 23 of each flexibility substation 2
It is connected.
Alternating current-direct current mixing micro-capacitance sensor system provided in an embodiment of the present invention is by by the high-voltage alternating system of flexible substation 2
21, high-voltage direct current 22 and low-voltage direct-current system 23 interconnect cyclization, and by high voltage dc bus 11 by each flexible substation 2
High-voltage direct current 22 connect, the low-voltage direct-current system 23 of each flexible substation 2 is connected by low-voltage direct busbar 12, from
And the bicyclic web frame of both-end based on flexible substation 2 is formed, each flexibility substation 2 is spare each other, when alternating current-direct current mixes micro- electricity
When one or several flexible substations 2 in net system break down, in addition to the flexible substation 2 of failure, other
Flexible substation 2 still is able to keep normal work, realizes load transfer and power flow of ring net is balanced, ensure that continuing for power distribution network
Power supply capacity.
As shown in Fig. 2, in a preferred embodiment, above-mentioned flexibility substation 2 further includes：Low-voltage alternating-current system 24, this is low
Pressure AC system 24 is connected with low-voltage direct-current system 23, and is connected with high-voltage alternating system 21 by mechanical electric magnetic-type substation 4.
High Level AC Voltage is transformed to height 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 is handed over high pressure by the first voltage conversion module by straightening galvanic electricity
Galvanic electricity is transformed to low-voltage DC, and low-voltage DC is sent to low-voltage direct-current system 23；High-voltage direct current 22 passes through setting
High voltage direct current is transformed to low-voltage DC in the second voltage conversion module of high-voltage direct current 22, low-voltage DC is sent out
It send to low-voltage direct-current system 23；Low-voltage direct-current system 23 will 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, and low-voltage AC is sent to low-voltage alternating-current system 24；Low-voltage alternating-current system 24 is logical
It crosses and is set to the 4th voltage transformation module of low-voltage alternating-current system 24 low-voltage AC is transformed to low-voltage DC, by low-pressure direct
Galvanic electricity is sent to low-voltage direct-current system 23；Low-voltage direct-current system 23 is by being set to the 5th voltage transformation of low-voltage direct-current system 23
Low-voltage DC is transformed to high voltage direct current by module, and high voltage direct current is sent to high-voltage direct current 22, and by low pressure
DC power conversion is High Level AC Voltage, and High Level AC Voltage is sent to high-voltage alternating system 21；High-voltage direct current 22 is by setting
High voltage direct current is transformed to High Level AC Voltage by the 6th voltage transformation module for being placed in high-voltage direct current 22, by High Level AC Voltage
It is sent to high-voltage alternating system 21.Flexible substation 2 in the embodiment of the present invention 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, and each module can be
Other modules are independently overhauled when working normally.
As shown in Fig. 2, optionally, in other embodiments of the invention, high-voltage alternating system 21 passes through mechanical electric magnetic-type
High Level AC Voltage is transformed to low-voltage AC by substation 4, and low-voltage AC is sent to low-voltage alternating-current system 24；Low-voltage alternating-current
Low-voltage AC is transformed to High Level AC Voltage by system 24 by mechanical electric magnetic-type substation 4, High Level AC Voltage is sent supreme
Press AC system 21.
It should be noted that it includes two flexible substations 2 that Fig. 1 and Fig. 2, which illustrate only alternating current-direct current mixing micro-capacitance sensor system,
Situation, in practical applications, according to actual needs, alternating current-direct current mixing micro-capacitance sensor system may include multiple flexible 2 (these of substations
Locate multiple for more than or equal to two), multiple flexibility substations 2 can interconnect cyclization, and invention is not limited thereto.
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 busbar 12 by the first DC transformer, passes through low-voltage direct busbar
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 busbar 12 is accessed, is transmitted by the reception low-voltage direct-current system 23 of low-voltage direct busbar 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 busbar 12, receives low-voltage direct-current system 23 by low-voltage direct busbar 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 busbar 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
Busbar 12, DC energy storage current transformer can carry out the DC charging or direct-current discharge of energy-storage battery group, and DC energy storage device 14 can
Can also be mobile energy storage device to be fixed 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 alternating current-direct current mixing micro-capacitance sensor system；Above-mentioned direct current is negative
Lotus 15 includes electric vehicle direct-current charging post, and above-mentioned third DC transformer is electric vehicle direct current charge-discharge current transformer (DC/
DC), electric vehicle direct current charge-discharge current transformer is bidirectional converter, and electric vehicle direct-current charging post is filled by electric vehicle direct current
The current transformer that discharges accesses above-mentioned low-voltage direct busbar 12, and electric vehicle direct current charge-discharge current transformer can 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 Fig. 2, above-mentioned alternating current-direct current mixing micro-capacitance sensor system further includes：Exchange micro-capacitance sensor 3, the exchange micro-capacitance sensor 3 packet
It includes：High voltage AC bus 31, low-voltage alternating-current busbar 32, AC power supply device 33, exchange energy storage device 34 and AC load 35 are high
Pressure ac bus 31 is 10kV ac bus, and low-voltage alternating-current busbar 32 is 380V ac bus.High voltage AC bus 31 and high pressure
AC system 21 is connected, and High Level AC Voltage is transmitted to high-voltage alternating system 21；AC power supply device 33 is become by the first exchange
Device access low-voltage alternating-current busbar 32 is flowed, electric energy is transmitted to by low-voltage alternating-current system 24 or exchange energy storage by low-voltage alternating-current busbar 32
System 34；It exchanges energy storage device 34 and low-voltage alternating-current busbar 32 is accessed by the second AC convertor, receive low-voltage alternating-current system 24
Or the electric energy that AC power supply device 33 transmits, the electric energy that low-voltage alternating-current system 24 or AC power supply device 33 are transmitted is deposited
Storage；When low-voltage alternating-current system 24 breaks down, AC power supply device 33 or exchange energy storage device 34 are transmitted to AC load 35
Electric energy；AC load 35 accesses low-voltage alternating-current busbar 32 by third AC convertor, receives low-voltage alternating-current system 24, exchange supplies
The electric energy that electric installation 33 or exchange energy storage device 34 transmit.Exchange micro-capacitance sensor 3 makes full use of distributed energy (AC power supply device
33) the continued power ability under grid fault conditions, improves the power supply reliability of alternating current-direct current mixing micro-capacitance sensor system, has
Island operating capacity and self-healing property height.
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 busbar 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 accesses above-mentioned low-voltage alternating-current busbar 32 by exchanging energy accumulation current converter, exchange energy storage device 34 can be fixed
Energy storage device can also be mobile energy storage device, such as mobile energy storage vehicle, device of the mobile energy storage vehicle as standby energy storage, solid
Energy supply is carried out when the regulating power deficiency for determining 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 vehicle
It flows charge and discharge electric converter and accesses above-mentioned low-voltage alternating-current busbar 32, Electric Vehicle's Alternating charge and discharge electric converter can carry out electric vehicle
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 with exchange micro-capacitance sensor 3 can be respectively by above-mentioned first DC transformer
It is realized 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, to cut-out 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 busbar 32 is by low
Pressure exchange interface (380V/AC) connects low-voltage alternating-current system 24.
Above-mentioned direct-current grid 1 by the interface of 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 ground, direct-current grid 1 by high voltage direct current interface or low-voltage direct interface, flexible
Substation 2 realizes conversion of the 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 passes through internal each system and realizes turning for electric energy AC-to DC
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,
Alternating current-direct current mixing micro-capacitance sensor system provided in an embodiment of the present invention realizes direct-current grid 1 and exchanges the energy between micro-capacitance sensor 3
Amount flowing so that DC power supply apparatus 13 can by itself generate electric energy by flexible substation 2 be delivered to exchange it is micro-
In power grid 3, remaining electric energy can be also delivered to by flexible substation 2 in exchange micro-capacitance sensor 3 by DC energy storage device 14, be handed over
It flows and the electric energy that itself is generated can be delivered to by flexible substation 2 in direct-current grid 1 for electric installation 33, exchange energy storage dress
It sets 34 remaining electric energy can be also delivered to by flexible substation 2 in direct-current grid 1, improves alternating current-direct current and mix micro- electricity
The flexibility of net system.
Alternating current-direct current mixing micro-capacitance sensor system provided in an embodiment of the present invention, it is bicyclic using the both-end based on flexible substation 2
Net and alternating current-direct current complementary type structure realize the flexible access of distributed energy, alternating current-direct current diversification load, promote distribution
The extensive access of the energy and regenerative resource realizes the highly reliable supply to load various energy resources form and renewable energy
Source 100% dissolves, and realizes 100% consumption of the energy and meets >=99.99% power supply reliability, realizes different voltages etc.
The Fault Isolation of grade, different power supply areas, improves the reliability of alternating current-direct current mixing micro-capacitance sensor system, efficiently solves existing match
Power grid can only provide alternating voltage, powering mode single problem, improve flexibility and the controllability of power distribution network；Alternating current-direct current is mixed
Close that the flexible substation in micro-grid system has network reconfiguration and self-healing, alternating current-direct current classification is powered and spatial load forecasting, renewable
The functions such as the energy " plug and play "；High-voltage alternating system in flexible substation and between high-voltage direct current, high-voltage alternating system
Between system and low-voltage direct-current system, between high-voltage direct current and low-voltage direct-current system, low-voltage direct-current system and low-voltage alternating-current system
To and fro flow of power can be realized between 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 still within the protection scope of the invention.
Claims (9)
1. a kind of alternating current-direct current mixing micro-capacitance sensor system, which is characterized in that including：Direct-current grid and at least two flexible power transformations
It stands；
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 busbar；
It is connected by the high voltage dc bus between the high-voltage direct current of each flexible substation, each flexible power transformation
It is connected by the low-voltage direct busbar between the low-voltage direct-current system stood.
2. alternating current-direct current mixing micro-capacitance sensor system according to claim 1, which is characterized in that the flexibility substation also wraps
It includes：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
It is connected with the high-voltage alternating system.
3. alternating current-direct current mixing micro-capacitance sensor system according to claim 2, which is characterized in that the high-voltage alternating system setting
There is first voltage conversion module, for High Level AC Voltage to be transformed to high voltage direct current, and the High Level AC Voltage is converted
For low-voltage DC；
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. alternating current-direct current mixing micro-capacitance sensor system according to claim 2 or 3, which is characterized in that the high-voltage alternating system
High Level AC Voltage is transformed to low-voltage AC by mechanical electric magnetic-type substation, the low-voltage alternating-current system passes through described
Low-voltage AC is transformed to High Level AC Voltage by mechanical electric magnetic-type substation.
5. alternating current-direct current mixing micro-capacitance sensor system according to claim 1, which is characterized in that the direct-current grid is also wrapped
It includes：DC power supply apparatus, DC energy storage device and DC load；
The DC power supply apparatus accesses the low-voltage direct busbar by the first DC transformer, passes through low-voltage direct mother
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 busbar by the second DC transformer, passes through low-voltage direct mother
Line receives the low-voltage direct-current system or the electric energy of 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 busbar by third DC transformer, is connect by the low-voltage direct busbar
Receive the electric energy of the low-voltage direct-current system, DC power supply apparatus or the transmission of DC energy storage device.
6. alternating current-direct current mixing micro-capacitance sensor system according to claim 5, which is characterized in that the DC power supply apparatus is light
Lie prostrate power generator.
7. alternating current-direct current mixing micro-capacitance sensor system according to claim 5 or 6, which is characterized in that the DC energy storage device
Including：Fixed energy storage device and mobile energy storage device.
8. alternating current-direct current mixing micro-capacitance sensor system according to claim 1, which is characterized in that further include：Exchange micro-capacitance sensor, institute
Stating exchange micro-capacitance sensor includes：High voltage AC bus, low-voltage alternating-current busbar, AC power supply device, exchange energy storage device and exchange are negative
Lotus；
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 busbar by the first AC convertor, passes through low-voltage alternating-current mother
Electric energy is transmitted to the low-voltage alternating-current system or exchange energy-storage system by line；
The exchange energy storage device accesses the low-voltage alternating-current busbar 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 busbar 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. alternating current-direct current mixing micro-capacitance sensor system according to claim 8, which is characterized in that the AC power supply device is wind
Power generation device.
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