CN106786598A - The complete controllable flexible distribution system of the alternating current-direct current seamless blended of level networking and method - Google Patents

The complete controllable flexible distribution system of the alternating current-direct current seamless blended of level networking and method Download PDF

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Publication number
CN106786598A
CN106786598A CN201611241294.2A CN201611241294A CN106786598A CN 106786598 A CN106786598 A CN 106786598A CN 201611241294 A CN201611241294 A CN 201611241294A CN 106786598 A CN106786598 A CN 106786598A
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China
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direct current
distribution
interface
electric power
grid type
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CN201611241294.2A
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Inventor
盛万兴
段青
孟晓丽
史常凯
李振
沙广林
李玉凌
马春艳
赵彩虹
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State Grid Corp of China SGCC
China Electric Power Research Institute Co Ltd CEPRI
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State Grid Corp of China SGCC
China Electric Power Research Institute Co Ltd CEPRI
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Priority to CN201611241294.2A priority Critical patent/CN106786598A/en
Publication of CN106786598A publication Critical patent/CN106786598A/en
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/04Circuit arrangements for ac mains or ac distribution networks for connecting networks of the same frequency but supplied from different sources
    • H02J3/06Controlling transfer of power between connected networks; Controlling sharing of load between connected networks

Abstract

The present invention relates to a kind of complete controllable flexible distribution system of alternating current-direct current seamless blended of level networking and method, flexible distribution system is made up of the single node system of many levels networking, flexible distribution Core equipment includes electric energy exchanger, exchange grid type electric power energy collector and direct current grid type electric power energy collector in single node system, and exchange grid type electric power energy collector and direct current grid type electric power energy collector are connected with electric energy exchanger;Electric energy exchanger high-pressure side AC and DC interface in single node system is connected on high-voltage alternating distribution line and HVDC distribution line, after single node level networking, the electric energy exchanger in each node system realizes seamless interconnection by high-voltage alternating distribution line and HVDC distribution line.The present invention will realize the networking of flexible distribution system level and alternating current-direct current seamless blended, effectively reduce the complexity that active power distribution network system is constituted, and significantly improve receiving ability of the following power distribution network to new elements such as distributed power source, micro-capacitance sensor and flexible loads.

Description

The complete controllable flexible distribution system of the alternating current-direct current seamless blended of level networking and method
Technical field
The present invention relates to a kind of complete controllable flexible distribution system, and in particular to a kind of alternating current-direct current seamless blended of level networking Complete controllable flexible distribution system and method.
Background technology
The high permeability of large number of intermittently distributed power source accesses power distribution network, and conventional electrical distribution net becomes " active ", and its is original , with shown in (c), the power distribution network under the tactic pattern is difficult to for tactic pattern (the weak contact of radial mode, feeder line) such as Fig. 1 (a), (b) The access of substantial amounts of distributed power source, micro-capacitance sensor and flexible load is received, and the access of these new elements causes power distribution network Complexity is increased sharply, and various current transformers, adjuster, stabilizer, controller, compensator are installed additional in this complicated distribution system, Although the temporary access for solving the problems, such as new element, causes distribution net work structure more complicated, and this mode is costly, Also system operation control and the difficulty safeguarded are considerably increased.
As nonlinear-load, sophisticated manufacturing load and DC load increase, user is to distribution network electric energy quality and many The requirement for planting electrical energy form customization electricity consumption is also increasingly stronger, current to rely on user oneself the guarantee quality of power supply and a large amount of dispersivenesses The mode that fairing is powered to DC load has not been optimal and most economical selection, this not only adds cost, easily product Raw power quality problem, also serious reduces efficiency, while current power distribution network cannot meet the customization electricity consumption need of diversified forms Seek problem.If individually building the DC distribution net of multiple voltage grade, its efficiency problem and economy again in low and medium voltage distribution network side Property also endure query to the fullest extent, and distributed power source, micro-capacitance sensor and flexible load a large amount of accesses, the supply of distribution network source and customer charge Interface increasingly obscure, power consumer depth participate in distribution network operation with manage demand it is more and more stronger, it is highly desirable Change the pattern of current centralized Control and passive management, and innovated from power distribution network own infrastructure, set up and concentrate and distribution Be combined, active control, stratification, alternating current-direct current mixing distribution system.
The content of the invention
To solve above-mentioned deficiency of the prior art, it is an object of the invention to provide the alternating current-direct current seamless blended of level networking Complete controllable flexible distribution system, critical equipment and method, the present invention propose a kind of level networking mould of complete controllable flexible distribution Type and the complete controllable flexible distribution system built based on the model, so as to effectively change current centralized Control and passive The pattern of management, and foundation concentrates the progressive active control of layering being combined with distribution flexibly to match somebody with somebody from power distribution network own infrastructure Electricity, solves the relevant issues under current power distribution network framework.
The purpose of the present invention is realized using following technical proposals:
The present invention provides a kind of alternating current-direct current seamless blended of level networking complete controllable flexible distribution system, and its improvements exists In the distribution system is made up of the single node system of many levels networking, and the single node system is by electric energy exchanger, exchange Grid type electric power energy collector and the networking of direct current grid type electric power energy collector level are constituted;Each single node system in the distribution system Interconnected by the on high-tension side high-voltage alternating distribution line of electric energy exchanger, HVDC distribution line, realize horizontal networking, passed through Electric energy exchanger arrives electric power energy collector subordinate and realizes high, medium and low voltage class longitudinal direction networking again to electric power energy collector;The single-unit Electric energy exchanger high-pressure side AC and DC interface in dot system is connected on high pressure AC and DC distribution line, and electric energy is exchanged The connection of device low pressure AC and DC side possesses the exchange grid type electric power energy collector and direct current grid type electric power collection energy of respective level interface Device.
Further, the low-pressure side exchange interface of the electric energy exchanger possesses corresponding electricity by exchanging electricity consumption connection Pressure grade and network interface exchange grid type electric power energy collector, and access relevant voltage grade distributed power source, energy storage And AC load;The low-voltage direct interface of the electric energy exchanger possesses relevant voltage grade simultaneously by direct current electricity consumption connection The direct current grid type electric power energy collector of network interface, and the distributed power source of relevant voltage grade, energy storage and the direct current that access are negative Lotus;
The mesolow direct current electrical interface of the exchange grid type electric power energy collector realizes the distribution of relevant voltage grade Power supply, energy storage, the access of DC load, in the direct current grid type electric power energy collector, low-voltage direct electrical interface realize phase Answer distributed power source, energy storage, the access of DC load of voltage class;
The high-pressure side exchange interface of the electric energy exchanger, DC interface connect high-voltage alternating distribution line, high pressure respectively DC power distribution line, the electric energy exchanger in each node system is matched somebody with somebody by high-tension side high-voltage alternating distribution line and HVDC Electric line realizes horizontal networking;Electric energy exchanger to exchange grid type electric power energy collector and direct current grid type electric power energy collector, then To different voltage class and form the longitudinal direction networking of exchange grid type electric power energy collector and direct current grid type electric power energy collector subordinate, The horizontal networking and longitudinal networking build the complete controllable flexible distribution system of level networking.
Further, the electric energy exchanger is used to provide high-pressure side alternating current and direct current interface and low-pressure side alternating current and direct current Interface;The exchange grid type electric power energy collector is used to provide AC and network interface and mesolow direct current electrical interface;It is described Direct current grid type electric power energy collector is used to provide direct current and network interface and mesolow direct current electrical interface.
Further, the high-pressure side alternating current and direct current interface that electric energy exchanger is provided is used to connect high-voltage alternating distribution respectively Circuit AC1kV~35kV, HVDC distribution line DC1.5kV~65kV;Low-pressure side exchange interface is used to connect exchange electricity consumption Circuit AC100V~380V, low-pressure side DC interface is used to connect direct current electric line DC150V~800V;Grid type alternating current Power energy collector then provides the exchange corresponding to electric energy exchanger low-pressure side exchange interface and network interface, and provides mesolow side direct current With electrical interface, for connecting low-voltage direct electric line DC5V~48V and middle straightening stream electric line DC100V~400V;It is grid-connected Type direct current power energy collector then provides the direct current and network interface corresponding to electric energy exchanger low-pressure side DC interface, and low in offer Straightening stream electrical interface, for connect low-voltage direct electric line DC5V~48V and middle straightening stream electric line DC100V~ 400V.Further, the electric energy exchanger inside includes the electric information layer being connected with each other and electric physical layer;It is described electric Information Level includes monitoring modular, intelligent control module, communication module and message processing module;The electric physical layer power electronics Solid state module and electric energy interface module;Each module mutual connection in the electric physical layer;The intelligent control module with it is described Power electronics solid state module is connected, common to complete electric energy exchanger and electric power energy collector inside AC and DC electric energy flexible transformation, from Realize the alternating current-direct current seamless blended of flexible distribution system.
Further, the electric energy exchanger power electronics solid state module include be sequentially connected solid state module controller, Protection and drive module and survey sense module;The electric energy exchanger electric energy interface module includes high-voltage alternating interface, HVDC Interface, low-voltage alternating-current interface and low-voltage direct interface;The exchange grid type electric power energy collector electric energy interface module includes exchange And network interface, middle straightening stream interface, low-voltage direct interface;The direct current grid type electric power energy collector electric energy interface module includes straight Flow and network interface, middle straightening stream interface, low-voltage direct interface.The electric energy exchanger respectively with exchange grid type electric power energy collector Interacted by the conversion of multiple kinds and much information with direct current grid type electric power energy collector, realize that electric energy is exchanged in region Device, exchange grid type electric power energy collector, the Based Intelligent Control of direct current grid type electric power energy collector and relevant voltage grade and form The plug and play of distributed power source, controllable burden etc..
The present invention also provides a kind of implementing for the complete controllable flexible distribution system of alternating current-direct current seamless blended of level networking Method, it is theed improvement is that, the implementation method of the system comprises the steps:
Step 1:It is determined that complete controllable flexible distribution system individual node level network model, and build individual node system;
Step 2:Electric energy exchanger high-pressure side AC and DC interface in multiple single node systems is connected into high pressure to hand over On stream distribution line and HVDC distribution line, horizontal networking interconnection is realized, the alternating current-direct current of level networking is constituted with reference to step 1 The complete controllable flexible distribution system of seamless blended.
Further, in the step 1, individual node level network model includes electric energy exchanger, exchange grid type electricity Power energy collector and direct current grid type electric power energy collector, the exchange grid type electric power energy collector and direct current grid type electric power energy collector It is connected with electric energy exchanger.
Further, in the step 2, the low-voltage alternating-current interface of the electric energy exchanger is by exchanging electricity consumption connection Possess the exchange grid type electric power energy collector of relevant voltage grade and network interface, and relevant voltage grade distributed power source, Energy storage and the access of AC load;The low-voltage direct interface of the electric energy exchanger is possessed accordingly by direct current electricity consumption connection The direct current grid type electric power energy collector of voltage class and network interface, and the distributed power source of relevant voltage grade, energy storage and straight The access of stream load;The low-voltage direct electricity consumption output interface of the exchange grid type electric power energy collector realizes relevant voltage grade Distributed power source, energy storage, the access of AC load, the mesolow direct current electrical interface reality of the direct current grid type electric power energy collector Distributed power source, energy storage, the access of DC load of existing relevant voltage grade;The high-voltage alternating interface of electric energy exchanger, high pressure DC interface connects high-voltage alternating distribution line, HVDC distribution line respectively, and the electric energy exchanger in each node system leads to Cross high pressure AC and DC distribution line and realize horizontal networking;Electric energy exchanger is grid-connected to exchange grid type electric power energy collector and direct current Type electric power energy collector, then to exchange grid type electric power energy collector and direct current grid type electric power energy collector subordinate different voltage class And form longitudinal direction networking, the horizontal networking and longitudinal networking build the complete controllable flexible of the alternating current-direct current seamless blended of level networking Distribution system.
In order to some aspects to the embodiment for disclosing have a basic understanding, simple summary is shown below is.Should Summarized section is not extensive overview, nor to determine key/critical component or describe the protection domain of these embodiments. Its sole purpose is that some concepts are presented with simple form, in this, as the preamble of following detailed description.
Compared with immediate prior art, the excellent effect that the technical scheme that the present invention is provided has is:
The present invention proposes the complete controllable flexible distribution system model and the structure based on the model of a kind of level networking The complete controllable flexible distribution system built, the system will receive the plug and play such as large-scale distributed power supply, energy storage, flexible load to connect Enter and realize unified coordination and administration, realize the multidirectional flowing of energy, effectively improve energy utilization rate, save distributed access and not Carry out distribution improvement cost.Meanwhile, the system can realize that area distribution is autonomous, electric energy flexible transformation, latticed full equity Alternating current-direct current seamless blended distribution network, possesses self-healing, network reconfiguration and immunocompetence, with high power supply reliability, substantially Exclude the risk of large-area power-cuts.Height fusion power network physical system and communication system of power grids information system will be realized covering by system The energy in town and country, electric power, informix service system.
Brief description of the drawings
Fig. 1 is conventional electrical distribution system structure, and (a) is radial mode;B () is this transformer station list contact information;C () is change Single contact information between power station;
Fig. 2 is the complete controllable flexible distribution system individual node level networking mould of alternating current-direct current seamless blended that the present invention is provided Type;
Fig. 3 is the complete controllable flexible distribution system group-network construction figure of alternating current-direct current seamless blended that the present invention is provided;
Fig. 4 is the flexible distribution critical equipment system architecture that the present invention is provided, and (a) is electric energy exchanger system structure;(b) It is exchange grid type electric power concentrator system structure;C () is direct current grid type electric power concentrator system structure.
Specific embodiment
Specific embodiment of the invention is described in further detail below in conjunction with the accompanying drawings.
The following description and drawings fully show specific embodiments of the present invention, to enable those skilled in the art to Put into practice them.Other embodiments can include structure, logic, it is electric, process and it is other changes.Embodiment Only represent possible change.Unless explicitly requested, otherwise single component and function are optional, and the order for operating can be with Change.The part of some embodiments and feature can be included in or replace part and the feature of other embodiments.This hair The scope of bright embodiment includes the gamut of claims, and all obtainable of claims is equal to Thing.Herein, these embodiments of the invention can individually or generally be represented that this is only with term " invention " For convenience, and if in fact disclosing the invention more than, it is not meant to automatically limit the scope of the application to appoint What single invention or inventive concept.
Embodiment 1
The present invention proposes a kind of complete controllable flexible distribution system of alternating current-direct current seamless blended based on level network model.It is logical Cross the complete controllable flexible distribution series equipment based on fusion electric information physical system:1. electric energy exchanger, there is provided high-voltage alternating, DC interface;Low pressure AC and DC interface;2. electric power energy collector, exchanges grid type and direct current grid type provides AC and DC simultaneously respectively Network interface;Exchange grid type provides mesolow direct current electrical interface, and direct current grid type is provided, mesolow direct current electrical interface.Respectively Electric energy exchanger high-pressure side AC and DC interface realizes interconnection by high-voltage alternating distribution line and DC power distribution line respectively.Respectively Low pressure friendship=the stream interface of electric energy exchanger possesses relevant voltage grade by exchanging electricity consumption connection and exchanges and network interface The access of distributed power source, energy storage, the AC load of exchange grid type electric power energy collector and relevant voltage grade etc.;Each electric energy is handed over The low-voltage direct interface of parallel operation is grid-connected by the direct current that direct current electricity consumption connection possesses relevant voltage grade direct current and network interface The access of distributed power source, energy storage, the DC load of type electric power energy collector and relevant voltage grade etc.;And AC type and once-through type The mesolow direct current electrical interface of electric power energy collector can also realize that the distributed power source of relevant voltage grade, energy storage, alternating current-direct current are born The access of lotus etc.;The high-pressure side exchange interface of electric energy exchanger, DC interface connect high-voltage alternating distribution line and direct current respectively Distribution line, the electric energy exchanger in each node system realizes horizontal networking by high pressure AC and DC distribution line;Electric energy is exchanged Device arrives different voltage class and form the longitudinal direction networking of electric power energy collector subordinate to electric power energy collector again, so just builds level group The complete controllable flexible distribution system of the alternating current-direct current seamless blended of net.
The flexible distribution system has larger difference with the current rigid power distribution network comprising alternating current-direct current mixing microgrid, such as preceding institute State, in the flexible distribution system by electric energy exchanger unification provide high-pressure side AC and DC (AC1kV~35kV, DC1.5kV~ 65kV) interface and low-pressure side NETOMAC, and realize electric energy exchanger high-pressure side interconnection in system, mesolow level multivoltage etc. The seamless confession distribution of level multiport alternating current-direct current, relevant voltage grade electric power energy collector, distributed power source, energy storage, flexible load etc. connect Enter.Meanwhile, rely on electric energy exchanger and electric power energy collector to realize demand Side Management, distributed power source, flexible load and match somebody with somebody Power network organically blends, and power supply and the plug and play of user and many quality electric energy customization services of user.
Embodiment 2
The present invention proposes a kind of based on complete controllable flexible distribution critical equipment:Electric energy exchanger and electric power energy collector it is complete Controllable flexible distribution level network model and the complete controllable flexible distribution system built based on the model.The flexible distribution In system, cutting-in control, energy management, coordinated operation are carried out by complete controllable flexible distribution series equipment unification, wherein electric energy is handed over Parallel operation unification offer high pressure AC and DC interface is respectively used to connection high-voltage alternating distribution line AC1kV~35kV, HVDC and matches somebody with somebody Electric line DC1.5kV~65kV;Low-voltage alternating-current interface is used to connect exchange electric line AC100V~380V, low-voltage direct interface For connecting direct current electric line DC150V~800V;Grid type alternating electromotive force energy collector is provided and corresponds to electric energy exchanger low pressure The exchange of top-cross stream interface and network interface, and mesolow side direct current electrical interface is provided, for connecting low-voltage direct electric line DC5V~48V and middle straightening stream electric line DC100V~400V;Grid type direct current power energy collector is provided to be handed over corresponding to electric energy The direct current and network interface of parallel operation low-pressure side DC interface, and mesolow direct current electrical interface is provided, used for connecting low-voltage direct Electric line DC5V~48V and middle straightening stream electric line DC100V~400V.With electric energy exchanger and electric power energy collector as core Complete controllable flexible distribution critical equipment carry out interconnection networking, form complete controllable flexible distribution system individual node level networking mould Type, and build the complete controllable flexible distribution system of single node, multiple single node networkings so that build the complete of alternating current-direct current seamless blended can Control flexible distribution system.
(1) complete controllable flexible distribution system individual node level network model
It is illustrated in figure 2 the complete controllable flexible distribution system equipped as core distribution with electric energy exchanger and electric power energy collector Individual node level network model, comprising an electric energy exchanger, exchange grid type electric power energy collector, a direct current in figure Grid type electric power energy collector, is intended merely to statement conveniently herein, is to be not limited to two electric power energy collectors but many in practical application Plant the group net operation of many.Fig. 2 shows with electric energy exchanger and electric power energy collector and complete controllable flexibly matches somebody with somebody as what core distribution was equipped Electric system individual node level network model, alternatively referred to as " distribution LAN " (Local Area Grid, LAG).The model is Fuse information stream, electric energy stream, the stratification distribution system of controlling stream, and by being flexibly managed with Energy Management System, it It will be the core node model for building the flexible power distribution network of alternating current-direct current seamless blended.The node is generated electricity by distributed energy, micro- energy The collection in source, converge and share and energy storage and load electricity consumption are dissolved, form the distribution LAN of hierarchical structure, wherein distribution Contained again in LAN " with electronic network " (Sub-LAG).Electric energy exchanger is mainly built towards high voltage grade and larger The distribution LAN of the alternating current and direct current seamless blended of capacity, and electric power energy collector then builds user oriented low voltage rank With the alternating current and direct current seamless blended electric line compared with low capacity with electronic network.Electric energy exchanger be based on power electronics and The new complete controllable distribution equipment of information technology, in addition to transformation function, its also integrated distribution LAN EMS, system One carries out grid-connected function management, the unified direct current and AC power distribution line for building multi-voltage grade, unified utility power quality control, system One energy management, it is convenient to solve distributed power source and the general access of flexible load unification, overall-in-one control schema in distribution LAN net Managed with efficient, and isolated with upper strata failure and disturbance.Its application scenarios are large range of power supplies in mainly distribution Scope and relatively high power distributed power source are accessed and dissolved.Electric energy exchanger constructs high-voltage alternating distribution line in fig 2 The seamless blended distribution LAN of AC1kV~35kV, HVDC distribution line DC1.5kV~65kV, and friendship is provided simultaneously Stream electric line AC100V~380V, high pressure direct current electric line DC150V~800V, can meet various alternating current-direct current adapteds The demand of electricity and distributed power source, the access of flexible load (distributed energy storage, electric automobile).New complete controllable electric power collection energy Device will build the Core equipment with electronic network, and in addition to alternating current transformation, electric power energy collector possesses similar to electric energy exchanger Function, simply manage pair as if low voltage and the electricity consumption scope compared with low capacity.To build distribution local with electronic network The part of net, can sets forth alternating current and direct current grid type electric power according to practical application scene come option and installment, in accompanying drawing Energy collector is incorporated to the application scenarios of distribution LAN, and alternating current and direct current grid type electric power energy collector is respectively from electric energy exchanger in figure The exchange of offer electric line AC100V~380V, high pressure direct current carried out with electric line DC150V~800V it is grid-connected, while also There is provided low-voltage direct electric line DC5V~48V and middle straightening stream electric line DC100V~400V, can equally meet compared with Various alternating current-direct currents of low capacity match somebody with somebody the demand of electricity consumption and compared with low capacity distributed power source, flexible load (distributed energy storage, electronic vapour Car) access.The alternating current-direct current of each voltage class that electric energy exchanger and electric power energy collector are provided matches somebody with somebody electricity consumption in the nodal analysis method Circuit can all possess or be combined according to practical situations and possess.
So distribution LAN passes through electric energy exchanger and electric power energy collector with electronic network so that alternating current and direct current is setting Standby inside carries out flexible transformation, by the AC and DC of different voltage class with " seamless " mixing of electricity consumption, operation with closed ring, with the past Exchange compared with two separate distribution systems of direct current, with control, coordination, efficiency, many advantages of economic dispatch.This The flexible distribution system for planting the alternating current-direct current seamless blended of stratification is the fundamental node for building flexible power distribution network, this distribution and collection The framework of middle combination advantageously in Hierarchical Control, it from miniature, small-size energy collection, energy storage and load dissolve to With electronic network, distribution LAN interconnection so as to form the flexible power distribution network of the alternating current-direct current seamless blended of wide area.
(2) the complete controllable flexible distribution system of the alternating current-direct current seamless blended of level networking
As shown in figure 3, it by four distribution LANs is the flexible of alternating current-direct current seamless blended that single node system is constituted to be exactly Power distribution network, it can be seen that the lattice of its latticed, full equity, strong ties, alternating current-direct current seamless blended, regional autonomy and hierarchical coordinative Office, can be by the high-voltage alternating distribution line AC1kV~35kV of electric energy exchanger and straightening high between each distribution LAN Stream distribution line DC1.5kV~65kV, carries out interconnection networking, and four examples of distribution local area network building are given in Fig. 3, and High-voltage alternating distribution line AC1kV~35kV and HVDC distribution that each distribution LAN passes through respective electric energy exchanger Circuit DC1.5kV~65kV is connected simultaneously, is only for example herein, and can be in actual applications 1,2,3,4 or multiple node systems The reciprocity networking of system have no limit extend, and with high-voltage alternating distribution line AC1kV~35kV and HVDC distribution line DC1.5kV~65kV can simultaneously be connected and can also individually connected.Electric energy exchanger in each distribution LAN can be according to reality Border application scenarios are provided simultaneously or combination provides exchange electric line AC100V~380V, middle straightening stream electric line DC150V ~800V, facilitates variety classes, the electric power energy collector of varying number, the distributed power source of larger capacity and the grid-connected company of flexible load Connect.And in distribution LAN with electronic network also can by electric power energy collector according to practical application scene configure simultaneously provide or Combination provides low-voltage direct electric line DC5V~48V and middle straightening stream electric line DC100V~400V, various so as to facilitate The distributed power source of low capacity and the grid integration of flexible load.
Core equipment-electric energy the exchanger and electric power energy collector that networking is realized in flexible distribution system are based on power electronics The new complete controllable serial distribution equipment of technology and information technology, in addition to transformation function, it goes back integrated energy management system, system One carries out grid-connected function management, unified straight, the AC power distribution line for building multi-voltage grade, unified utility power quality control, energy Management, convenient solution Distributed Generation in Distribution System and flexible load unify general access, overall-in-one control schema and efficiently management, and And isolate with upper strata failure and disturbance.Its system architecture such as Fig. 4 (a), (b), (c) are shown, mainly include:Power electronics solid-state mould Block, electric energy interface module, monitoring modular and energy-storage module (optional), intelligent control module, communication module and message processing module. Wherein nucleus module is power electronics solid state module, is mainly included:Solid state module controller, protection and drive module and survey sense mould Block etc..Electric energy exchanger and electric power energy collector are interacted by the conversion of multiple kinds and much information, realize electricity in region Can exchanger, distributed power source, the controllable burden of the Based Intelligent Control of electric power energy collector and relevant voltage grade and form etc. i.e. Plug-and-play.Electric power energy collector is close with each functions of modules of electric energy exchanger, simply application scenarios, line mode, become flow model and Circuit topology is implemented to be not quite similar.
The present invention for current active power distribution network cannot solve distributed power source efficiently access, plug and play, centralization control The problems such as system and following alternating current-direct current mixing power distribution network develop, it is proposed that a kind of level network model of controllable flexible distribution entirely with And the complete controllable flexible distribution system of the alternating current-direct current seamless blended built based on the model, innovate the structure mould of power distribution network Formula, by the way that controllable flexible distribution Core equipment -- alterating and direct current energy is realized in the level networking of electric energy exchanger and electric power energy collector entirely Seamless blended, flexibly controllable, intelligent management and adapted, effectively reduce the complexity that active power distribution network system is constituted, reduce point Be casually arranged with standby species, quantity, improve operation controllability with it is maintainable, significantly improve following power distribution network to distributed power source, micro- The receiving ability of the new element such as power network and flexible load.
The above embodiments are merely illustrative of the technical solutions of the present invention rather than its limitations, although with reference to above-described embodiment pair The present invention has been described in detail, and those of ordinary skill in the art can still enter to specific embodiment of the invention Row modification or equivalent, these are applying without departing from any modification of spirit and scope of the invention or equivalent Within pending claims of the invention.

Claims (9)

1. a kind of complete controllable flexible distribution system of alternating current-direct current seamless blended of level networking, it is characterised in that the distribution system It is made up of the single node system of many levels networking, the single node system is by electric energy exchanger, exchange grid type electric power collection energy Device and the networking of direct current grid type electric power energy collector level are constituted;Electric energy exchanger in the single node system of the distribution system is high Pressure top-cross, DC interface are connected on high-voltage alternating distribution line and HVDC distribution line, electric energy exchanger low pressure Top-cross, DC interface generation exchange electric line and middle pressure DC power distribution line, respectively connection exchange grid type electric power energy collector With direct current grid type electric power energy collector;After the single node level networking, the electric energy exchanger in each single node system is by height Pressure AC power distribution line and HVDC distribution line realize interconnection.
2. the complete controllable flexible distribution system of alternating current-direct current seamless blended as claimed in claim 1, it is characterised in that the electric energy is handed over The low-pressure side exchange interface of parallel operation possesses the exchange grid type of relevant voltage grade and network interface by exchanging electricity consumption connection Electric power energy collector, and the distributed power source with relevant voltage grade, energy storage and AC load access;The electric energy is exchanged The low-pressure side DC interface of device is grid-connected by the direct current that middle pressure DC power distribution line connection possesses relevant voltage grade and network interface Type electric power energy collector, and the distributed power source with relevant voltage grade, energy storage and DC load access;
The mesolow side direct current electrical interface of the exchange grid type electric power energy collector realizes the distributed electrical of relevant voltage grade Source, energy storage, the access of DC load, the low-pressure side direct current of the direct current grid type electric power energy collector realize corresponding electricity with electrical interface Press distributed power source, energy storage, the access of DC load of grade;
The high-pressure side exchange interface of the electric energy exchanger, DC interface connection high pressure AC and DC distribution line, each node system In electric energy exchanger realize that horizontal networking is interconnected by high pressure AC and DC distribution line;Electric energy exchanger to exchange grid type Electric power energy collector and direct current grid type electric power energy collector, then to exchange grid type electric power energy collector and direct current grid type electric power collection energy Different voltage class and form the longitudinal direction networking of device subordinate, the horizontal networking and longitudinal networking build the complete controllable of level networking Flexible distribution system.
3. the complete controllable flexible distribution system of alternating current-direct current seamless blended as claimed in claim 2, it is characterised in that the electric energy is handed over Parallel operation is used to provide high-pressure side alternating current and direct current interface, and low-pressure side alternating current and direct current interface;The exchange grid type electric power collection Energy device is used to provide AC and network interface and mesolow side direct current electrical interface;The direct current grid type electric power energy collector is used for Medium voltage side DC distribution and network interface and mesolow side direct current electrical interface are provided.
4. the complete controllable flexible distribution system of alternating current-direct current seamless blended as claimed in claim 2, it is characterised in that electric energy exchanger The high-pressure side alternating current and direct current interface of offer is used to connect high-voltage alternating distribution line AC1kV~35kV, HVDC distribution line DC1.5kV~65kV, the exchange interface of its low-pressure side is used to connect exchange electric line AC100V~380V, and low-pressure side direct current connects Mouth is for connecting medium-voltage distribution circuit DC150V~800V;Exchange grid type electric power energy collector is then provided corresponding to electric energy exchanger The exchange of low-pressure side exchange interface and network interface AC100V~380V, and mesolow side direct current electrical interface is provided, for connecting Low-voltage direct electric line DC5V~48V and middle straightening stream electric line DC100V~400V;Direct current grid type electric power energy collector Direct current and network interface DC150V~800V corresponding to electric energy exchanger low-pressure side DC interface is then provided, and it is straight to provide mesolow Stream electrical interface, for connecting low-voltage direct electric line DC5V~48V and middle straightening stream electric line DC100V~400V.
5. the complete controllable flexible distribution system of alternating current-direct current seamless blended as claimed in claim 2, it is characterised in that the electric energy is handed over Parallel operation inside includes the electric information layer being connected with each other and electric physical layer;The electric information layer includes monitoring modular, intelligence Control module, communication module and message processing module;The electric physical layer power electronics solid state module, the storage of electric energy interface module Can module;Each module mutual connection in the electric physical layer;The intelligent control module, communication module and the power electronics Solid state module is connected, common to complete AC and DC electric energy flexible transformation inside electric energy exchanger and electric power energy collector, flexible from realizing The alternating current-direct current seamless blended of distribution system.
6. the complete controllable flexible distribution system of alternating current-direct current seamless blended as claimed in claim 5, it is characterised in that the electric power electricity Sub- solid state module includes the solid state module controller, protection and drive module and the survey sense module that are sequentially connected;The electric energy is exchanged Device electric energy interface module includes high-voltage alternating interface, HVDC interface, low-voltage alternating-current interface and middle straightening stream interface;The friendship Stream grid type electric power energy collector electric energy interface module includes exchange and network interface, middle straightening stream interface, low-voltage direct interface;It is described Direct current grid type electric power energy collector electric energy interface module includes direct current and network interface, middle straightening stream interface, low-voltage direct interface.
The electric energy exchanger respectively with exchange grid type electric power energy collector and direct current grid type electric power energy collector by various logical The conversion and much information interaction of agreement are interrogated, realizes that electric energy exchanger in region, exchange grid type electric power energy collector, direct current are grid-connected The Based Intelligent Control of type electric power energy collector and distributed power source, the controllable burden of relevant voltage grade and form etc. are to insert i.e. With.
7. the complete controllable flexible distribution of the alternating current-direct current seamless blended of the level networking any one of a kind of application claim 1-6 The distribution method of system, it is characterised in that the distribution method of the flexible distribution system comprises the steps:
Step 1:It is determined that the individual node level network model of complete controllable flexible distribution system, builds individual node system;
Step 2:Electric energy exchanger high-pressure side NETOMAC in the single node system of many levels networking is connected to On high-voltage alternating distribution line and HVDC distribution line, horizontal networking interconnection is realized, with reference to step 1 composition level networking The complete controllable flexible distribution system of alternating current-direct current seamless blended.
8. the distribution method of flexibly distribution system as claimed in claim 7, it is characterised in that in the step 1, individual node Level network model includes electric energy exchanger, exchange grid type electric power energy collector and direct current grid type electric power energy collector, the friendship Stream grid type electric power energy collector and direct current grid type electric power energy collector are connected with electric energy exchanger.
9. the distribution method of flexibly distribution system as claimed in claim 7, it is characterised in that in the step 2, the electric energy The low-voltage alternating-current interface of exchanger possesses the exchange grid type of relevant voltage grade and network interface by exchanging electricity consumption connection Electric power energy collector, and the distributed power source of relevant voltage grade, energy storage and the AC load for accessing;The electric energy exchanger Low-voltage direct electrical interface possesses the direct current grid type electric power of relevant voltage grade and network interface by direct current electricity consumption connection Energy collector, and the distributed power source of relevant voltage grade, energy storage and the DC load for accessing;
It is described exchange grid type electric power energy collector mesolow direct current electrical interface realize relevant voltage grade distributed power source, Energy storage, the access of DC load;The mesolow direct current electrical interface of the direct current grid type electric power energy collector realizes relevant voltage The distributed power source of grade, energy storage, the access of DC load;The high-voltage alternating interface of the electric energy exchanger, DC interface point Not Lian Jie high pressure AC and DC distribution line, electric energy exchanger in each node system passes through high-voltage alternating distribution line, straightening high Stream distribution line realizes horizontal networking;Electric energy exchanger to exchange grid type electric power energy collector and direct current grid type electric power collection energy Device, then to exchange grid type electric power energy collector and direct current grid type electric power energy collector subordinate different voltage class and form longitudinal direction Networking, the horizontal networking and longitudinal networking build the complete controllable flexible distribution system of alternating current-direct current seamless blended of level networking.
CN201611241294.2A 2016-12-29 2016-12-29 The complete controllable flexible distribution system of the alternating current-direct current seamless blended of level networking and method Pending CN106786598A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
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CN108667147A (en) * 2018-06-15 2018-10-16 贵州电网有限责任公司 Straightening stream distribution center Optimization Scheduling in a kind of flexibility containing more micro-capacitance sensors
US10819112B1 (en) 2019-03-27 2020-10-27 Abb Schweiz Ag Feeder line fault response using direct current interconnection system
US10971934B2 (en) 2018-12-31 2021-04-06 Abb Schweiz Ag Distribution networks with flexible direct current interconnection system
US11031773B2 (en) 2019-03-27 2021-06-08 Abb Power Grids Switzerland Ag Transformer isolation response using direct current link
US11121543B2 (en) 2018-12-31 2021-09-14 Abb Schweiz Ag Fault mitigation in medium voltage distribution networks

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108667147A (en) * 2018-06-15 2018-10-16 贵州电网有限责任公司 Straightening stream distribution center Optimization Scheduling in a kind of flexibility containing more micro-capacitance sensors
US10971934B2 (en) 2018-12-31 2021-04-06 Abb Schweiz Ag Distribution networks with flexible direct current interconnection system
US11121543B2 (en) 2018-12-31 2021-09-14 Abb Schweiz Ag Fault mitigation in medium voltage distribution networks
US10819112B1 (en) 2019-03-27 2020-10-27 Abb Schweiz Ag Feeder line fault response using direct current interconnection system
US11031773B2 (en) 2019-03-27 2021-06-08 Abb Power Grids Switzerland Ag Transformer isolation response using direct current link

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