CN110247399A - A kind of power distribution network photovoltaic maximum consumption method and system based on Monte Carlo simulation - Google Patents
A kind of power distribution network photovoltaic maximum consumption method and system based on Monte Carlo simulation Download PDFInfo
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- CN110247399A CN110247399A CN201910309385.2A CN201910309385A CN110247399A CN 110247399 A CN110247399 A CN 110247399A CN 201910309385 A CN201910309385 A CN 201910309385A CN 110247399 A CN110247399 A CN 110247399A
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- 238000000342 Monte Carlo simulation Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000029087 digestion Effects 0.000 claims abstract description 11
- 238000004458 analytical method Methods 0.000 claims abstract description 5
- 238000004364 calculation method Methods 0.000 claims description 15
- 239000011159 matrix material Substances 0.000 claims description 15
- 238000011217 control strategy Methods 0.000 claims description 6
- 230000004069 differentiation Effects 0.000 claims 1
- 230000001737 promoting effect Effects 0.000 abstract description 3
- 238000004088 simulation Methods 0.000 abstract 1
- 238000010248 power generation Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/04—Circuit arrangements for ac mains or ac distribution networks for connecting networks of the same frequency but supplied from different sources
- H02J3/06—Controlling transfer of power between connected networks; Controlling sharing of load between connected networks
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- H02J3/383—
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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
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- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Photovoltaic Devices (AREA)
Abstract
The invention patent relates to a kind of, and the power distribution network photovoltaic maximum based on Monte Carlo simulation dissolves method, this method utilizes power distribution network design parameter and correlation model, power distribution network photovoltaic maximum consumption amount is obtained, and fragility node during photovoltaic consumption is analyzed, improve photovoltaic maximum consumption amount.The simulation of addressing constant volume is carried out firstly, accessing using Monte Carlo simulation to power distribution network photovoltaic, Matpower flow calculation program is utilized later, obtains each node voltage situation.By constantly promoting photovoltaic capacity, seeks node voltage and get over line capacity.Secondly, power distribution network node voltage gets over line situation under analysis photovoltaic maximum consumption capacity, fragile node is obtained, by controlling photovoltaic DC-to-AC converter, improves power distribution network photovoltaic digestion capability.This method alleviates the problem of power distribution network strictly limits new energy access capacity, and photovoltaic in power distribution network is avoided to access fragile node, to a certain degree raising power distribution network photovoltaic digestion capability.It provides strong support for national clean energy resource strategy.
Description
Technical field
The present invention designs a kind of power distribution network photovoltaic maximum consumption method based on Monte Carlo simulation, belongs to the new energy of power train
Source is dissolved to field, especially while considering negative photovoltaic DC-to-AC converter control strategy, promotes the technology of power distribution network photovoltaic digestion capability.
Background technique
As the mankind are exhausted to fossil energy and the worry of environmental degradation increasingly aggravates, renewable energy replaces traditional energy
It will constantly raise speed.Many countries have put into effect about the new cleaning fuels such as solar energy power generation relevant policies.Therefore, the following sun
The accounting that can generate electricity will further expansion, power distribution network new energy content will be stepped up.
With the continuous promotion of solar power generation, power distribution network can gradually be turned to multi-source power grid from traditional load type power grid
Become, the access of solar power generation can make power distribution network trend foldback phenomenon occur.The infiltration of high proportion photovoltaic power generation, which can raise, matches
Grid nodes voltage, to reduce the reliability of operation of power networks.How power distribution network maximum photovoltaic digestion capability is obtained, and true
Promoting power distribution network photovoltaic maximum digestion capability under the premise of protecting reliability then becomes the emphasis of current research.
Summary of the invention
Present invention aims at solving the problems, such as that current power distribution network can not find out its specific PV capacity, one kind is proposed
Power distribution network photovoltaic maximum based on Monte Carlo simulation dissolves method, by carrying out to power distribution network photovoltaic access point and access capacity
Monte Carlo simulation obtains power distribution network operation result under different analog cases using Matpower flow calculation program.By right
As a result analysis, obtains power distribution network fragility node and photovoltaic maximum dissolves capacity.Voltage sensibility matrix theory is utilized later,
Photovoltaic DC-to-AC converter is controlled, power distribution network photovoltaic digestion capability is promoted.
The present invention proposes that a kind of power distribution network photovoltaic maximum consumption method based on Monte Carlo simulation includes the following steps:
Firstly, carrying out Load flow calculation to power distribution network difference photovoltaic access point and access capacity using Monte-carlo Simulation Method
The present invention sets photovoltaic access point bound, passes through Monte Carlo mould firstly the need of according to power distribution network interstitial content
Quasi- technology carries out the Load flow calculation based on Matpower to the case where power distribution network difference access node and different access loads.
It obtains fragile node and power distribution network maximum dissolves capacity.It is as follows that fragile node obtains formula:
Gas next -event estimator carries out discretization firstly the need of by load data, due to platform area and upper layer transformer frequency acquisition compared with
Height, so needing to process data into the load data as unit of hour, the present invention passes through to the acquisition number in unit hour
According to mean value is sought, its load data is obtained.Later by construction one-zero programming model, model objective function is as follows:
Wherein Ai=1 indicates that node i is fragile node, and N is Monte Carlo simulation number, BjFor jth time Monte Carlo simulation
Under Load flow calculation, node i voltage gets over line situation, and more line is 1, and more line is not 0.T is a constant, to differentiate sentencing for fragile node
The other factor.
It is under the capacity that power distribution network maximum, which dissolves capacity definition, and no matter what variation is photovoltaic access node do, and power distribution network is all
It will appear voltage and get over line node.
Secondly, obtaining photovoltaic DC-to-AC converter control strategy by analyzing voltage sensibility matrix.
The present invention will obtain voltage sensibility matrix, it is necessary first to analyze Load flow calculation equation, infer correspondence
Voltage sensibility matrix, it is shown that detailed process is as follows.
Load flow calculation equation are as follows:
Wherein n is power distribution network number of nodes, Gij,BijIt is respectively node conductance, susceptance represents matrix.
Shift out voltage sensibility matrix onto are as follows:
By being deformed to it, acquisition final form:
Output that photovoltaic DC-to-AC converter is idle control:
It obtains photovoltaic access node voltage and gets over line difference:
Δ V=Vi-Vbase (5)
Wherein, ViFor the voltage of node i, VbaseFor upper voltage limit
Secondly the idle increment of inverter is obtained according to voltage sensibility matrix:
Finally, promoting photovoltaic digestion capability
By avoiding, fragility node accesses photovoltaic and photovoltaic DC-to-AC converter control strategy promotes power distribution network photovoltaic and dissolves energy
Power.
Beneficial technical effect
The power distribution network photovoltaic maximum consumption method based on Monte Carlo simulation is proposed herein, can find out distribution fragility section
Point promotes power distribution network maximum PV capacity by the regulation of the photovoltaic DC-to-AC converter based on voltage sensibility matrix.For power grid
Develop clean energy resource to provide strong support.
Detailed description of the invention
Attached drawing 1 is the specific flow chart of this method, and Fig. 2 is distribution network structure structure chart, and Fig. 3 is under Monte Carlo simulation
Load flow calculation scatter plot, Fig. 4 are distribution network voltage situation map.
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
Below by taking IEEE33 node distribution network systems as an example, the present invention is specifically introduced in conjunction with Fig. 1.
Fig. 2 is 33 joint net frame structure charts, accesses photovoltaic to different access node differences by Monte Carlo simulation
Power distribution network carries out the Load flow calculation based on Matpower under capacity, obtains fragile node and the consumption of power distribution network maximum photovoltaic is held
Amount.
Fig. 3 is the calculation of tidal current under 10000 Monte Carlo simulations, and abscissa is photovoltaic entirety access amount, indulges and sits
It is designated as voltage per unit value, each point in figure is voltage corresponding to distribution network voltage highest node after a Load flow calculation,
In " power system voltage quality and the reactive power administrative provisions " of national grid, for 10kV route, it is desirable that its voltage deviation
It should be less than ± 7%, therefore it is 9.2MW that Fig. 3, which obtains current power distribution network most to dissolve large capacity, passes through the trend under Monte Carlo simulation
It calculating, we obtain fragile node, T value is set as 0.9, and the results are shown in Table 1:
The fragile node serial number of table 1
By avoiding accessing photovoltaic to fragile node, while control strategy for inverter is introduced, photovoltaic totality access amount is mentioned
Height arrives 9.5MW, carries out Load flow calculation using Matpower, it is as shown in Figure 4 to obtain voltage results.
Figure 4, it is seen that in the case where 9.5MW access, by the access and control that avoid fragility node
The idle output of photovoltaic DC-to-AC converter is accessed, it is final to guarantee network voltage reliability.To promote power distribution network photovoltaic digestion capability.
The foregoing is merely to explain presently preferred embodiments of the present invention, it is not intended to do any form to the present invention accordingly
On limitation, therefore, it is all have make any modification or change for the present invention under identical creation spirit, all should include
The invention is intended to the scopes of protection.
Claims (11)
1. a kind of power distribution network photovoltaic maximum based on Monte Carlo simulation dissolves method, it is characterised in that the following steps are included:
Step 1: Monte Carlo simulation is carried out to power distribution network photovoltaic access point and capacity；
Step 2: Load flow calculation is carried out using power distribution network of the Matpower flow calculation program to access photovoltaic；
Step 3: according to the calculation of tidal current under Monte Carlo simulation, obtaining fragile node and the consumption of power distribution network photovoltaic maximum
Capacity；
Step 4: using voltage sensibility matrix theory, corresponding control strategy is proposed to photovoltaic DC-to-AC converter, by avoiding fragility
Node accesses the control of photovoltaic and photovoltaic DC-to-AC converter, final to improve power distribution network photovoltaic digestion capability.
2. the power distribution network photovoltaic maximum according to claim 1 based on Monte Carlo simulation dissolves method, which is characterized in that
It needs to simulate the multiple on-positions of power distribution network photovoltaic in the step 1.
3. the power distribution network photovoltaic maximum according to claim 2 based on Monte Carlo simulation dissolves method, which is characterized in that
It needs to simulate power distribution network photovoltaic access capacity in the step 1.
4. the power distribution network photovoltaic maximum based on Monte Carlo simulation dissolves method according to claim 1, which is characterized in that
Implementation steps 2 need to carry out Load flow calculation using Matpower.
5. the power distribution network photovoltaic maximum based on Monte Carlo simulation is required to dissolve method, feature according to claim 1
It is, step 3 needs analytical procedure 2 as a result, obtaining power distribution network fragility node, and fragile node obtains model are as follows:
Wherein Ai=1 indicates that node i is fragile node, and N is Monte Carlo simulation number, BjFor jth time Monte Carlo simulation trend
Under calculating, node i voltage gets over line situation, and more line is 1, and it is a constant that more line, which is 0, T, for differentiate the differentiation of fragile node because
Son.
6. the power distribution network photovoltaic maximum according to claim 4 based on Monte Carlo simulation dissolves method, which is characterized in that
Step 3 needs analytical procedure 2 as a result, obtaining power distribution network photovoltaic maximum consumption capacity.
7. the power distribution network photovoltaic maximum according to claim 1 based on Monte Carlo simulation dissolves method, which is characterized in that
The step 4 need to analyze voltage sensibility matrix, and the analysis of voltage sensibility matrix need to use in step 2
Load flow calculation equation used in Matpower:
Wherein n is power distribution network number of nodes, Gij,BijIt is respectively node conductance, susceptance represents matrix.
8. the power distribution network photovoltaic maximum according to claim 1 based on Monte Carlo simulation dissolves method, which is characterized in that
The step 4 need to analyze voltage sensibility matrix, need to carry out shifting acquisition voltage sensibility square onto Load flow calculation equation
Battle array:
9. the power distribution network photovoltaic maximum according to claim 1 based on Monte Carlo simulation dissolves method, which is characterized in that
The step 4 need to deform voltage sensibility matrix:
10. the power distribution network photovoltaic maximum according to claim 1 based on Monte Carlo simulation dissolves method, feature exists
In the step 4 need to make corresponding control strategy to photovoltaic, and specific Controlling model is as follows:
Voltage is obtained first gets over line amount
Δ V=Vi-Vbase
Wherein, ViFor the voltage of node i, VbaseFor upper voltage limit,
Secondly the idle increment of inverter is obtained according to voltage sensibility matrix:
The final control realized to more line node voltage, improves power distribution network photovoltaic digestion capability.
11. the power distribution network photovoltaic maximum according to claim 1 based on Monte Carlo simulation dissolves method, feature exists
In the step 4 promotes distribution by avoiding power distribution network fragility node from accessing photovoltaic and regulation photovoltaic DC-to-AC converter two-step Taylor-Galerkin
The photovoltaic digestion capability of net.
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Application publication date: 20190917 |