CN205945095U - And net type scene integrated power production system's electric energy measurement system - Google Patents

And net type scene integrated power production system's electric energy measurement system Download PDF

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Publication number
CN205945095U
CN205945095U CN201620910161.9U CN201620910161U CN205945095U CN 205945095 U CN205945095 U CN 205945095U CN 201620910161 U CN201620910161 U CN 201620910161U CN 205945095 U CN205945095 U CN 205945095U
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China
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transformer
electric energy
output
energy meter
input
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姚昆
赵森
郑志强
孟强
张颖
廖源
张丽敏
王圆圆
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Wuhan NARI Ltd
Jincheng Power Supply Co of State Grid Shanxi Electric Power Co Ltd
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Wuhan NARI Ltd
Jincheng Power Supply Co of State Grid Shanxi Electric Power Co Ltd
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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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/56—Power conversion systems, e.g. maximum power point trackers
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/76—Power conversion electric or electronic aspects
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
    • 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
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/12—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation
    • Y04S10/123—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation the energy generation units being or involving renewable energy sources

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Abstract

The utility model discloses an and net type scene integrated power production system's electric energy measurement system, include photovoltaic array and wind power generation battle array, each output of photovoltaic array communicates rather than the input of corresponding dc -to -ac converter respectively, the output of dc -to -ac converter and the input of box transformer intercommunication, and each output of wind power generation battle array communicates rather than the input of corresponding box transformer respectively, the output of box transformer and the input of booster station inlet wire cabinet intercommunication, the booster station output communicates with the public power grid of remote site transformer substation, still be equipped with branch road electric energy meter and voltage current transformer between each box transformer and the booster station inlet wire cabinet, branch road electric energy meter and voltage current transformer output and collection terminal connection, be equipped with gateway energy meter and voltage current transformer in the remote site transformer substation inlet wire cabinet, gateway energy meter and voltage current transformer's output and collection terminal connection, the output and the master server intercommunication of acquisition terminal.

Description

A kind of electric energy metered system of grid-connected wind-light combined power generation system
Technical field
This utility model is related to Electric Energy Metering Technology field, in particular to a kind of electricity of grid-connected wind-light combined power generation system Can metering system.
Background technology
In recent years, under the background that traditional fossil energy is day by day exhausted and environmental problem increasingly highlights, greatly develop the sun The regenerative resources such as energy, wind-powered electricity generation have become trend of the times, at this stage China in honourable development of resources still based on stand-alone development, Because solar energy and wind energy have intermittent and undulatory property a feature, single wind-power electricity generation or photovoltaic generation are difficult to make up above-mentioned Characteristic, preferably regional in some illumination conditions of China and wind energy resources, solar energy and wind energy can be preferably mutual in sequential Mend, keep stable output power, therefore, realize honourable cogeneration on a large scale significant.
The major issue that grid-connected system exists is it is simply that access electrical network, in work by the way of single utilization In journey design, blower fan or photovoltaic are generated electricity and can be respectively connected to booster stations, sent into electrical network through different passages, characteristics of output power is mutual Do not affect.And after electric energy produced by wind-light combined power generation system confluxes on a large scale, pass through a grid-connected passage through same booster stations Access public electric wire net, the characteristics of output power after confluxing is together decided on by wind-power electricity generation and photovoltaic generation.Due to current various places electricity The subsidy electricity price that power company develops to honourable Renewable Energy Resources is different, and single utilization mode can be according to state using independent metering Family's policy carries out rate for incorporation into the power network, but which construction costs is higher, is unfavorable for that wind, light resources are developed jointly, scene joint Development system, due to sharing a grid-connected passage, is accurately measured to it and need to rationally be distinguished wind-powered electricity generation and photovoltaic electricity energy, And subsidized by different electricity prices, still do not have set of system or method can solve this problem at present.
Utility model content
The purpose of this utility model is to overcome a kind of electricity of grid-connected wind-light combined power generation system of above-mentioned not enough offer Can metering system, compared with prior art, the drawbacks of this programme solves traditional wind-light combined power generation system independent measure, right Wind-power electricity generation and the unified metering of photovoltaic generation, eliminate the equipment such as substantial amounts of transformator, chopper and wire, greatly save work Journey is invested, accurate measurement electricity volume, promotes the reasonable utilization of honourable Renewable resource on a large scale.
For achieving the above object, this utility model includes photovoltaic array and wind-power electricity generation battle array, described photovoltaic array each Input connection, the outfan of described inverter and the input of box type transformer of outfan inverter corresponding respectively Connection, the input connection of corresponding box type transformer distinguished by each outfan of described wind-power electricity generation battle array, described box The outfan of transformator is connected with the input of booster stations incoming line cabinet, the main transformer of described booster stations incoming line cabinet outfan and booster stations Depressor input connects, and described booster stations are connected with opposite end transformer station public electric wire net；
It is additionally provided with branch road electric energy meter, described branch road electric energy meter is defeated between each box type transformer described and booster stations incoming line cabinet Go out end to be connected with acquisition terminal；
It is provided with gate energy meter and voltage current transformer, described gate energy meter in described opposite end transformer station public electric wire net It is connected with acquisition terminal with the outfan of voltage current transformer, the outfan of described acquisition terminal is connected with main control server, Described main control server is connected with the electrical secondary system server of booster stations.
Further, a kind of method of the electric energy metered system of grid-connected wind-light combined power generation system, step is：
1) gather the AC signal of gate energy meter and branch road electric energy meter in a cycle, calculate wink in each sampling period When power, generated energy and irregularity of wave form THD；
2) acquisition terminal receives the real time data of gate energy meter and branch road electric energy meter, monitoring facilities and equipments operating mode and electric energy Quality, and gathered data is managed, it is uploaded to main control server；
3) main control server receives the secondary monitoring and protection device signal of booster stations；
4) main control server is processed to data, and the critical point generated energy data of foundation gate energy meter and each branch road are propped up The generated energy data difference of road electric energy meter calculates total losses it is considered to each factor pair such as load fluctuation, harmonic wave and three-phase imbalance The impact of electric energy loss, is modeled using BP neural network method and calculates, and obtains the electric energy loss of each branch road, counts photovoltaic Branch road and the generated energy of wind-force branch road；
5) according to country to renewable energy power generation online valuation approach, electricity volume and the subsidy amount of money are calculated.
Further, described step 4) in：
Main transformer basic comprehensive loss Δ P in booster stations1Model such as formula：
ΔP0=P0+β2PK
Δ Q=Q0+Kβ2QK
ΔP1=Δ P0+KQ×ΔQ
In formula：ΔP0-- load loss, P0-- open circuit loss, Pk-- nominal load is lost, β -- average load coefficient, K-- Load fluctuation coefficient, KQ-- reactive loss increases coefficient, β -- average load coefficient, Q0=I0%SN,QK=UK%SN,I0%-- No-load current percentage ratio, UK%-- short-circuit voltage percentage ratio, SN-- transformator rated capacity.
Main transformer harmonic loss model Δ P in booster stations2As formula：
ΔP 2 = Σ n = 2 ∞ I n 2 n R T
In formula：I-- fundamental current；UN-- transformator reduction rated voltage.
Three-phase imbalance added losses model Δ P3As formula：
ΔP3={ [(Ia-Ib)2+(Ia-Ic)2+(Ib-Ic)2]/3}×RT×10-3
In formula：Ia、Ib、Ic-- fundamental current.
Line loss model Δ P4As formula：
ΔP 4 = 3 I i 2 R
Transformator and line loss model are set up using BP neural network, using BP neural network algorithm, it is counted Calculate, input layer is load factor, the first photovoltaic circuit current distortion rate, the first photovoltaic circuit average current, tri-phase unbalance factor, the N wind-force circuit current distortion rate, the n-th wind-force circuit average current, the first output layer and the second output layer are each branch road loss value, The active P being measured by gate energy meter0P with the metering of each branch road electric energy meteri(i=1,2 ... N), calculating its total losses isAnd then it is calculated each branch road loss ratio, statistics photovoltaic branch road and wind-force branch road quantity, from And it is calculated photovoltaic branch road and wind-force branch road loss of electricity, subsequently can calculate sending out of each row photovoltaic branch road and Ge Lie blower fan branch road Electricity.
The utility model has the advantage of：Compared with prior art, this programme solves traditional wind-light combined power generation system The drawbacks of independent measure, to wind-power electricity generation and the unified metering of photovoltaic generation, eliminate substantial amounts of transformator, chopper and wire etc. Equipment, greatlys save construction investment, accurate measurement electricity volume, promotes the reasonable profit of honourable Renewable resource on a large scale With.
Brief description
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing：
Fig. 1 is system principle structure chart of the present utility model.
Fig. 2 is neural network structure figure of the present utility model.
In figure：Photovoltaic array 1, wind-power electricity generation battle array 2, inverter 3, box type transformer 4, booster stations incoming line cabinet 5, booster stations 6, Opposite end transformer station public electric wire net 7, branch road electric energy meter 8, gate energy meter 9, voltage current transformer 10, acquisition terminal 11, master control Server 12, input layer I, hidden layer II, the first output layer III, the second output layer IV, load factor A, the first photovoltaic circuit electric current Aberration rate B, the first photovoltaic circuit average current C, tri-phase unbalance factor D, the n-th wind-force circuit current distortion rate E, the n-th wind electricity Road average current F, loss ratio G.
Specific embodiment
In order to be more clearly understood to technical characteristic of the present utility model, purpose and effect, now comparison accompanying drawing is detailed Specific embodiment of the present utility model is described.
As shown in Figure 1-2, a kind of electric energy metered system of grid-connected wind-light combined power generation system of this utility model, including light Photovoltaic array 1 and wind-power electricity generation battle array 2, the input company of corresponding inverter 3 distinguished by each outfan of described photovoltaic array 1 Logical, the outfan of described inverter 3 is connected with the input of box type transformer 4, and each outfan of described wind-power electricity generation battle array 2 divides The input connection of not corresponding box type transformer 4, the outfan of described box type transformer 4 and booster stations incoming line cabinet 5 Input connects, and described booster stations incoming line cabinet 5 outfan connects with the main transformer input of booster stations 6, described booster stations 6 and Opposite end transformer station public electric wire net 7 connects；
Described between each box type transformer 4 and booster stations incoming line cabinet 5, it is additionally provided with branch road electric energy meter 8, described branch road electric energy Table 8 outfan is connected with acquisition terminal 11；
It is provided with gate energy meter 9 and voltage current transformer 10, described critical point electricity in described opposite end transformer station public electric wire net 7 Can the outfan of table 9 and voltage current transformer 10 be connected with acquisition terminal 11, the outfan of described acquisition terminal 11 and master control Server 12 connects, and described main control server 12 is connected with the electrical secondary system server of booster stations 6.
Further, a kind of method of the electric energy metered system of grid-connected wind-light combined power generation system, step is：
1) gather the AC signal of gate energy meter 9 and branch road electric energy meter 8 in a cycle, calculate in each sampling period Instantaneous power, generated energy and irregularity of wave form THD；
2) acquisition terminal 11 receives the real time data of gate energy meter 9 and branch road electric energy meter 8, monitoring facilities and equipments operating mode and The quality of power supply, and gathered data is managed, it is uploaded to main control server 12；
3) main control server 12 receives the secondary monitoring and protection device signal of booster stations 6；
4) main control server 12 is processed to data, according to critical point generated energy data and each branch road of gate energy meter 9 The generated energy data difference of upper branch road electric energy meter 8 calculate total losses it is considered to load fluctuation, harmonic wave and three-phase imbalance etc. each because The impact to electric energy loss for the element, is modeled using BP neural network method and calculates, obtain the electric energy loss of each branch road, statistics Photovoltaic branch road and the generated energy of wind-force branch road；
5) according to country to renewable energy power generation online valuation approach, electricity volume and the subsidy amount of money are calculated.
Further, described step 4) in：
Main transformer basic comprehensive loss Δ P in booster stations 61Model such as formula：
ΔP0=P0+β2PK
Δ Q=Q0+Kβ2QK
ΔP1=Δ P0+KQ×ΔQ
In formula：ΔP0-- load loss, P0-- open circuit loss, Pk-- nominal load is lost, β -- average load coefficient, K-- Load fluctuation coefficient, KQ-- reactive loss increases coefficient, β -- average load coefficient, Q0=I0%SN,QK=UK%SN,I0%-- No-load current percentage ratio, UK%-- short-circuit voltage percentage ratio, SN-- transformator rated capacity.
Main transformer harmonic loss model Δ P in booster stations 62As formula：
ΔP 2 = Σ n = 2 ∞ I n 2 n R T
In formula：I-- fundamental current；UN-- transformator reduction rated voltage.
Three-phase imbalance added losses model Δ P3As formula：
ΔP3={ [(Ia-Ib)2+(Ia-Ic)2+(Ib-Ic)2]/3}×RT×10-3
In formula：Ia、Ib、Ic-- fundamental current.
Line loss model Δ P4As formula：
ΔP 4 = 3 I i 2 R
Transformator and line loss model are set up using BP neural network, using BP neural network algorithm, it is counted Calculate, input layer I is load factor A, the first photovoltaic circuit current distortion rate B, the first photovoltaic circuit average current C, three-phase imbalance Spend D, the n-th wind-force circuit current distortion rate E, the n-th wind-force circuit average current F, the first output layer III and the second output layer IV is Each branch road loss value, the active P being measured by gate energy meter 90P with the metering of each branch road electric energy meter 8i(i=1,2 ... N), Calculating its total losses isAnd then be calculated each branch road loss ratio, statistics photovoltaic branch road and Wind-force branch road quantity, thus being calculated photovoltaic branch road and wind-force branch road loss of electricity, subsequently can calculate each row photovoltaic branch road and The generated energy of each row blower fan branch road.
Main control server 12, in addition to data storage and process, is also used for receiving scheduling signals, and can send remote signal Making telemechanical program behavior, close partial branch, coordinating the characteristics of output power of photovoltaic array 1 and wind-power electricity generation battle array 2 it is ensured that combining Electricity generation system stable output power.
Above in conjunction with accompanying drawing, embodiment of the present utility model is described, but this utility model is not limited to The specific embodiment stated, above-mentioned specific embodiment is only schematically, rather than restricted, this area common Technical staff of the present utility model enlightenment under, without departing from this utility model objective and scope of the claimed protection situation Under, also can make a lot of forms, these belong within protection of the present utility model.

Claims (1)

1. a kind of electric energy metered system of grid-connected wind-light combined power generation system, including photovoltaic array (1) and wind-power electricity generation battle array (2) it is characterised in that：The input of each outfan of described photovoltaic array (1) inverter (3) corresponding respectively is even Logical, the outfan of described inverter (3) is connected with the input of box type transformer (4), and each of described wind-power electricity generation battle array (2) is defeated Go out input connection, the outfan of described box type transformer (4) and the booster stations of end box type transformer (4) corresponding respectively The input connection of incoming line cabinet (5), described booster stations incoming line cabinet (5) outfan is connected with the main transformer input of booster stations (6) Logical, described booster stations (6) are connected with opposite end transformer station public electric wire net (7)；
It is additionally provided with branch road electric energy meter (8), described branch road electricity between described each box type transformer (4) and booster stations incoming line cabinet (5) Can table (8) outfan be connected with acquisition terminal (11)；
It is provided with gate energy meter (9) and voltage current transformer (10), described critical point in described opposite end transformer station public electric wire net (7) The outfan of electric energy meter (9) and voltage current transformer (10) is connected with acquisition terminal (11), described acquisition terminal (11) defeated Go out end to connect with main control server (12), described main control server (12) is connected with the electrical secondary system server of booster stations (6).
CN201620910161.9U 2016-08-19 2016-08-19 And net type scene integrated power production system's electric energy measurement system Active CN205945095U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106160003A (en) * 2016-08-19 2016-11-23 国网电力科学研究院武汉南瑞有限责任公司 The electric energy metered system of a kind of grid-connected wind-light combined power generation system and method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106160003A (en) * 2016-08-19 2016-11-23 国网电力科学研究院武汉南瑞有限责任公司 The electric energy metered system of a kind of grid-connected wind-light combined power generation system and method
CN106160003B (en) * 2016-08-19 2020-01-14 国网电力科学研究院武汉南瑞有限责任公司 Method of electric energy metering system of grid-connected wind-solar combined power generation system

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