CN109038539A - A kind of alternating current-direct current mixing micro-capacitance sensor topology design method based on energy router - Google Patents
A kind of alternating current-direct current mixing micro-capacitance sensor topology design method based on energy router Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
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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
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
A kind of alternating current-direct current mixing micro-capacitance sensor topology design method based on energy router, the design method can separate the sub- microgrid of multiple alternating current-direct currents, it is orientable to simulate present and following a variety of microgrid topology structures, to meet a variety of demands of micro-capacitance sensor research, including: city garden type micro-capacitance sensor, fabric of island-in-sea type micro-capacitance sensor, family type micro-capacitance sensor；On the one hand alternating current-direct current mixing micro-capacitance sensor design and realization at this stage, can effectively eliminate the negative characteristics such as renewable energy output intermittence, randomness, providing reliable power supply to power distribution network, can be improved efficiency of energy utilization；On the other hand it faces the future, micro-capacitance sensor is converted with electric energy, stores, is transmitted as main region power supply system from single, gradually it is changed into while integrates natural gas, the energy hinge of the conversion of the multiple-energy-sources such as heat energy utilization, interaction, polymorphic type energy resource system can be integrated based on the alternating current-direct current mixing micro-capacitance sensor that energy router is core, is laid the foundation thus.
Description
Technical field
The present invention relates to smart grid, micro-capacitance sensor and alternating current-direct current mixing fields, in particular to a kind of to be based on energy router
Alternating current-direct current mixing micro-capacitance sensor topology design method.
Background technique
Due to the promotion that extensive, remote conveying distribution technique develops, in the world most electric power using exchange it is defeated/match
Transmission mode of the electricity as mainstream.But recently as the development of power electronic technique, DC distribution or electrical equipment are increasingly
Generally.Conventional electrical distribution host will use AC distribution mode, and direct current largely uses DC/AC inverter or AC/DC with electrical equipment
Rectifier.Direct-flow distribution system can simplify existing with largely ac-dc conversion link, the reduction energy are passing in electrical equipment
Loss during defeated improves efficiency of energy utilization.Most of generation of electricity by new energy and load are all DC equipments, and power grid is very
It is easy to use direct current supply mode, currently employed Alternating Current Power Supply, it is therefore necessary to explore direct current supply mode.
Since power technology Developing mainstream direction has been formed, at present in the world still without extensive, commercialized direct current
The application example of public power distribution network.DC distribution technology is wanted to be used widely in the power system there are also very long road
It walks, alternating current-direct current mixing distribution more likely becomes feasible transitional technology mode.
Currently, domestic still at an early stage for the research of DC distribution net, alternating current-direct current distribution technique living is set from planning
Meter, management and running, control and protection, key equipment, economic analysis etc. need to study there are also a large amount of problems.Many is straight about handing over
The inspection that the research achievement of stream distribution technique is not practiced, it is also necessary to constantly improve.Foreign Experience is carried out related
Pilot project explores the DC distribution applicable technology and operational mode for being suitble to China's actual conditions, as technological reserve, it is necessary to carry out
Corresponding perspective study.
By using alternating current-direct current mixing power distribution network, AC load and DC load can be respectively connected to ac bus and direct current
Bus reduces energy conversion links, reduces cost, so that alternating current-direct current load is easier to access system, therefore alternating current-direct current mixing is matched
Power grid is the development trend of the following power distribution network.
Currently, foring new challenge and machine to the development of power grid with the access of various new energy and diversity load
It meets.Power system stability service requirement supply and demand Real-time Balancing, and the renewable energy power generations such as wind-force, photovoltaic have it is intermittent, no
Deterministic characteristic, generating electricity, which can there are problems that, to dissolve completely.Meanwhile with the access of diversity load, direct current
Load also embodies its superiority.And application distribution formula energy storage technology and wind-powered electricity generation, photovoltaic distributed power supply and user are a variety of
The micro-capacitance sensor that load group is built up but has not been able to realize self-contr ol, protection and management.
Summary of the invention
It is a kind of based on energy router be core alternating current-direct current mixing micro-capacitance sensor topology design method, which can separate more
A sub- microgrid of alternating current-direct current can be directed to simulate present and following a variety of microgrid topology structures, to meet the more of micro-capacitance sensor research
Kind demand, including: city garden type micro-capacitance sensor, fabric of island-in-sea type micro-capacitance sensor, family type micro-capacitance sensor.
A kind of method of micro-capacitance sensor topology design, the described method comprises the following steps:
(1) topology design is carried out for micro-capacitance sensor.
(2) to the sub- microgrid introduction of direct current, including: acyclic type DC feeder micro-capacitance sensor (city garden type micro-capacitance sensor, sea
Island micro-capacitance sensor, family type micro-capacitance sensor), bipolar system DC feeder micro-capacitance sensor.
The step (1) specifically:
Design micro-capacitance sensor structure is low-voltage AC/DC mixed type micro-capacitance sensor, and micro-grid system passes through step-down transformer or isolation transformation
Device accesses local power distribution network.
Micro-capacitance sensor part is exchanged, using radial pattern topological structure, convenient for the centralization pipe of AC load and renewable energy
Reason；DC micro-electric mesh portions, using dual-ring topology structure, by acyclic type direct-current grid (acyclic type DC feeder 1) and double
Pole formula direct-current grid (bipolar system DC feeder 2) collectively forms.
Alternating current-direct current micro-capacitance sensor directly passes through different AD solid-state transformers and is connected, convenient for two sets of direct-current grids with exchange it is micro-
Power grid distinguishes intarconnected cotrol；Be connected between direct-current grid by DC/DC current transformer, two sets of sub- microgrids of direct current can independent operating,
Power interaction can also be carried out by power electronics interface and control couples.
The step (2) specifically:
Its DC bus-bar voltage of the sub- microgrid of acyclic type DC feeder is non-constant type DC feeder according to demand for control, straight using PN
Flow bus structure.The sub- micro-capacitance sensor integrates the direct-current grid of three kinds of application types: city garden type microgrid, fabric of island-in-sea type are micro-
Net, the sub- microgrid of family type direct current.
In three applied sub- microgrids, adopts and use photovoltaic generating system as main renewable energy, it is primary electrical
Equipment includes photovoltaic generation unit, lithium battery energy storage battery unit, straight/straight solid-state transformer (DD solid-state transformer), hands over/directly solid-state change
Depressor (AD solid-state transformer) etc., secondary electrical equipment is using distributed microgrid control unit (DCU).Primary equipment has module
Change extended capability.
Type direct current microgrid in city garden is city garden using renewable energy such as photovoltaics using the mode of being incorporated into the power networks
Illumination energy supply.Micro- the outfits city garden type energy source router of direct current, integrated lithium battery energy storage battery unit, photovoltaic generation unit,
Energy management unit, city garden lighting load, the sub- microgrid are connected by DD solid-state transformer with acyclic type DC feeder 1.
The sub- microgrid of fabric of island-in-sea type direct current has simultaneously/off-grid operation ability, and the renewable energy such as photovoltaic preferentially supply this in microgrid
Ground load electric energy demand.The sub- microgrid of the type equips fabric of island-in-sea type microgrid router, integrate lithium battery energy storage battery unit, local load,
The equipment such as energy management unit.Load and the concentration cabinet of power supply unit access can configure multiple-channel output and branch according to field condition
Control, be connected by DD solid-state transformer with acyclic type DC feeder 1, by AD solid-state transformer with mix microgrid AC portion
It is connected.
The sub- microgrid of family type direct current with supply domestic consumer illumination with living load based on, utilize family type energy router
Supply user's low capacity, multi-voltage grade, alternating current-direct current load power demand.Wherein, integrated energy microgrid router, photovoltaic power generation
Unit, energy-storage units, energy management unit, load control unit.
Bipolar system direct-current grid (bipolar system DC feeder 2) uses PN0 DC bus structure.The micro-capacitance sensor passes through bipolar
Formula AC/DC current transformer access exchange bus rod is incorporated into the power networks.It is real for carrying out the following multi-voltage grade micro-grid system extension
It tests.
A kind of alternating current-direct current mixing micro-capacitance sensor topology design method based on energy router, the topology can separate multiple hand over directly
Sub- microgrid is flowed, can be directed to simulate present and following a variety of microgrid topology structures, to meet a variety of demands of micro-capacitance sensor research,
Including: city garden type micro-capacitance sensor；Fabric of island-in-sea type micro-capacitance sensor；Family type micro-capacitance sensor.Alternating current-direct current mixing micro-capacitance sensor design and reality
It is existing, on the one hand it at this stage, can effectively eliminate the negative characteristics such as renewable energy output intermittence, randomness, to power distribution network
Reliable power supply is provided, can be improved efficiency of energy utilization；On the other hand it faces the future, micro-capacitance sensor is turned from single with electric energy
Change, store, being transmitted as main region power supply system, being gradually changed into while integrating natural gas, the conversion of the multiple-energy-sources such as heat energy utilization, phase
The energy hinge of interaction can integrate polymorphic type energy system based on the alternating current-direct current mixing micro-capacitance sensor that energy router is core
System, lays the foundation thus.
Detailed description of the invention
Fig. 1 is the electrical connection signal of three classes DC micro-electric net system；
Fig. 2 is alternating current-direct current mixing micro-capacitance sensor topology schematic diagram.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
In order to effectively reduce loss of the energy in transmission process, efficiency of energy utilization is improved, the present invention provides one kind
Alternating current-direct current mixing micro-capacitance sensor topology design method based on energy router, as shown in Figure 1, design micro-capacitance sensor structure is low pressure friendship
DC mixed type micro-capacitance sensor, micro-grid system access local power distribution network by step-down transformer or isolating transformer.
Micro-capacitance sensor part is exchanged, using radial pattern topological structure, convenient for the centralization pipe of AC load and renewable energy
Reason；DC micro-electric mesh portions, using dual-ring topology structure is used, by acyclic type direct-current grid (acyclic type DC feeder 1)
It is collectively formed with bipolar system direct-current grid (bipolar system DC feeder 2).
Alternating current-direct current micro-capacitance sensor directly passes through different AD solid-state transformers and is connected, convenient for two sets of direct-current grids with exchange it is micro-
Power grid distinguishes intarconnected cotrol；Be connected between direct-current grid by DC/DC current transformer, two sets of sub- microgrids of direct current can independent operating,
Power interaction can also be carried out by power electronics interface and control couples.
Its DC bus-bar voltage of the sub- microgrid of acyclic type DC feeder is non-constant type DC feeder, the son according to demand for control
Micro-capacitance sensor integrates the direct-current grid of three kinds of application types: the sub- microgrid of fabric of island-in-sea type direct current, the sub- microgrid of community-type family, family type are straight
Flow sub- microgrid.
Bipolar system direct-current grid (bipolar system DC feeder 2) uses PN0 DC bus structure.The micro-capacitance sensor passes through bipolar
Formula AC/DC current transformer access exchange bus rod is incorporated into the power networks.It is real for carrying out the following multi-voltage grade micro-grid system extension
It tests.
The sub- microgrid electrical design of the applied direct current of three classes is as shown in Figure 2: in three applied sub- microgrids, adopting and uses photovoltaic
Electricity generation system as main renewable energy, an electrical equipment include photovoltaic generation unit, lithium battery energy storage battery unit, it is straight/
Straight solid-state transformer (DD solid-state transformer), friendship/straight solid-state transformer (AD solid-state transformer) etc., secondary electrical equipment, which uses, to be divided
Dissipate type microgrid control unit (DCU).Primary equipment has modularization extended capability.
Type direct current microgrid in city garden is city garden using renewable energy such as photovoltaics using the mode of being incorporated into the power networks
Illumination energy supply.Micro- the outfits city garden type energy source router of direct current, integrated lithium battery energy storage battery unit, photovoltaic generation unit,
Energy management unit, city garden lighting load, the sub- microgrid are connected by DD solid-state transformer with acyclic type DC feeder 1.
The sub- microgrid of fabric of island-in-sea type direct current has simultaneously/off-grid operation ability, and the renewable energy such as photovoltaic preferentially supply this in microgrid
Ground load electric energy demand.The sub- microgrid of the type equips fabric of island-in-sea type microgrid router, integrate lithium battery energy storage battery unit, local load,
The equipment such as energy management unit.Load and the concentration cabinet of power supply unit access can configure multiple-channel output and branch according to field condition
Control, be connected by DD solid-state transformer with acyclic type DC feeder 1, by AD solid-state transformer with mix microgrid AC portion
It is connected.
The sub- microgrid of family type direct current with supply domestic consumer illumination with living load based on, utilize family type energy router
Supply user's low capacity, multi-voltage grade, alternating current-direct current load power demand.Wherein, integrated energy microgrid router, photovoltaic power generation
Unit, energy-storage units, energy management unit, load control unit.
Wherein, AD solid-state transformer is connect with local power distribution network, is responsible for forming 300Vdc DC convergent current bus bar.DD solid-state becomes
The transformation of energy-storage battery 48Vdc low pressure is risen to 300Vdc by depressor, as backup power source；Battery then converted by photovoltaic DC MPPT or
Commercial power rectification charging.Micro-capacitance sensor control unit DCU passes through the electric parameter after acquisition on CAN2.0A or RS485 communication modes
Reach EMS.Wherein, AD solid-state transformer and the transformed direct current of DD solid-state transformer are PN bipolar structure.
It will be appreciated by those skilled in the art that attached drawing is the schematic diagram of a preferred embodiment, the embodiments of the present invention
Serial number is for illustration only, does not represent the advantages or disadvantages of the embodiments.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (3)
1. a kind of alternating current-direct current mixing micro-capacitance sensor topology design method based on energy router, it is characterised in that: the method packet
Include following steps:
(1) topology design is carried out for micro-capacitance sensor；
(2) to the sub- microgrid introduction of direct current, including: acyclic type DC feeder micro-capacitance sensor (city garden type micro-capacitance sensor, fabric of island-in-sea type
Micro-capacitance sensor, family type micro-capacitance sensor), bipolar system DC feeder micro-capacitance sensor.
2. a kind of alternating current-direct current mixing micro-capacitance sensor topology design method based on energy router according to claim 1,
It is characterized in that: the step (1) specifically:
1, design micro-capacitance sensor structure is low-voltage AC/DC mixed type micro-capacitance sensor, and micro-grid system is become by step-down transformer or isolation
Depressor accesses local power distribution network；
2, micro-capacitance sensor part is exchanged, using radial pattern topological structure, convenient for the centralized management of AC load and renewable energy；
3, DC micro-electric mesh portions, using dual-ring topology structure is used, by acyclic type direct-current grid (acyclic type DC feeder
1) it is collectively formed with bipolar system direct-current grid (bipolar system DC feeder 2)；
4, alternating current-direct current micro-capacitance sensor directly passes through different AD solid-state transformers and is connected, convenient for two sets of direct-current grids with exchange micro- electricity
Net difference intarconnected cotrol；Be connected between direct-current grid by DC/DC current transformer, two sets of sub- microgrids of direct current can independent operating,
Power interaction can be carried out by power electronics interface and control couples.
3. a kind of alternating current-direct current mixing micro-capacitance sensor topology design method based on energy router according to claim 1,
It is characterized in that: the step (2) specifically:
1, its DC bus-bar voltage of the sub- microgrid of acyclic type DC feeder is non-constant type DC feeder according to demand for control, using PN
DC bus structure, the sub- micro-capacitance sensor integrate the direct-current grid of three kinds of application types: city garden type microgrid, fabric of island-in-sea type
Microgrid, the sub- microgrid of family type direct current；
2, it in three applied sub- microgrids, adopts and uses photovoltaic generating system as main renewable energy, once electrically set
Standby includes photovoltaic generation unit, lithium battery energy storage battery unit, straight/straight solid-state transformer (DD solid-state transformer), friendship/straight solid-state transformation
Device (AD solid-state transformer) etc., secondary electrical equipment is using distributed microgrid control unit (DCU)；Primary equipment has modularization
Extended capability；
3, the sub- microgrid of city garden type direct current is city garden photograph using renewable energy such as photovoltaics using the mode of being incorporated into the power networks
Bright energy supply；The micro- outfit city garden type energy source router of direct current, integrates lithium battery energy storage battery unit, photovoltaic generation unit, energy
Administrative unit, city garden lighting load are measured, which is connected by DD solid-state transformer with acyclic type DC feeder 1；
4, the sub- microgrid of fabric of island-in-sea type direct current has simultaneously/off-grid operation ability, and the renewable energy such as photovoltaic preferentially supply local in microgrid
Load electric energy demand；The sub- microgrid of the type equips fabric of island-in-sea type microgrid router, integrates lithium battery energy storage battery unit, local load, energy
Measure the equipment such as administrative unit；Load and the concentration cabinet of power supply unit access can configure multiple-channel output and branch control according to field condition
System, be connected by DD solid-state transformer with acyclic type DC feeder 1, by AD solid-state transformer with mix microgrid AC portion phase
Even；
5, the sub- microgrid of family type direct current with supply domestic consumer illumination with living load based on, utilize family type energy router supply
To user's low capacity, multi-voltage grade, alternating current-direct current load power demand；Wherein, integrated energy microgrid router, photovoltaic power generation list
Member, energy-storage units, energy management unit, load control unit；
6, bipolar system direct-current grid (bipolar system DC feeder 2) uses PN0 DC bus structure；The micro-capacitance sensor passes through bipolar system
AC/DC current transformer access exchange bus rod is incorporated into the power networks；For carrying out the following multi-voltage grade micro-grid system way of extensive experimentation.
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| CN110768290A (en) * | 2019-10-25 | 2020-02-07 | 湖北师范大学 | Alternating current-direct current series-parallel connection distribution network for energy internet |
| CN110912183A (en) * | 2019-10-31 | 2020-03-24 | 格瑞美科技(武汉)有限公司 | Power generation system topological structure containing multiple types of renewable energy sources |
| CN110957722A (en) * | 2019-11-28 | 2020-04-03 | 昆明理工大学 | Day-ahead optimized scheduling method for micro energy grid with electricity-to-gas conversion equipment |
| CN111082421A (en) * | 2019-12-24 | 2020-04-28 | 嘉兴恒创电力设计研究院有限公司 | AC/DC micro-grid system based on energy router and protection method thereof |
| CN112086957A (en) * | 2019-06-14 | 2020-12-15 | 南京谷峰智能技术有限公司 | High-quality electric energy intelligent distribution system structure of alternating current-direct current hybrid park network based on Internet of things |
| CN114285064A (en) * | 2021-10-29 | 2022-04-05 | 新疆金风科技股份有限公司 | Energy router, energy management and control system and energy management and control method suitable for park |
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| CN110768290A (en) * | 2019-10-25 | 2020-02-07 | 湖北师范大学 | Alternating current-direct current series-parallel connection distribution network for energy internet |
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