CN106159937B - A method of improving multichannel section ability to transmit electricity - Google Patents
A method of improving multichannel section ability to transmit electricity Download PDFInfo
- Publication number
- CN106159937B CN106159937B CN201510152784.4A CN201510152784A CN106159937B CN 106159937 B CN106159937 B CN 106159937B CN 201510152784 A CN201510152784 A CN 201510152784A CN 106159937 B CN106159937 B CN 106159937B
- Authority
- CN
- China
- Prior art keywords
- channel
- section
- distributed
- ability
- scheme
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000005611 electricity Effects 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 33
- 230000005540 biological transmission Effects 0.000 claims abstract description 53
- 238000009826 distribution Methods 0.000 claims abstract description 24
- 238000010276 construction Methods 0.000 claims abstract description 12
- 238000005303 weighing Methods 0.000 claims abstract description 12
- 230000003068 static effect Effects 0.000 claims abstract description 7
- 230000001052 transient effect Effects 0.000 claims abstract description 7
- 230000008901 benefit Effects 0.000 claims abstract description 6
- 238000013461 design Methods 0.000 claims description 7
- 238000004458 analytical method Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 6
- 238000013499 data model Methods 0.000 claims description 5
- 230000000052 comparative effect Effects 0.000 claims description 4
- 238000011160 research Methods 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 239000004744 fabric Substances 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 9
- 238000005516 engineering process Methods 0.000 abstract description 6
- 238000011161 development Methods 0.000 abstract description 4
- 230000008878 coupling Effects 0.000 description 6
- 238000010168 coupling process Methods 0.000 description 6
- 238000005859 coupling reaction Methods 0.000 description 6
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000007726 management method Methods 0.000 description 2
- 230000008520 organization Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 229910052622 kaolinite Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000005619 thermoelectricity Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The present invention relates to a kind of methods improving multichannel section ability to transmit electricity, the technique study of the present invention analyzes the Crack cause of transmission bottlenecks, for trend distribution it is serious it is unbalanced to reduce multichannel section ability to transmit electricity the case where, it analyzes and is unevenly distributed weighing apparatus degree to reduce trend to improve the technology and economic feasibility of ability to transmit electricity using distributed serial coupled mode reactor, consider the type equipment to be distributed trend, static security, transient stability, short circuit current, voltage power-less is distributed, ability to transmit electricity, various influences such as network loss and relay protection, to find out allocation optimum scheme.Too high new route cost, series connection centralized compensation technology cost height and the limitations such as difficult in maintenance are overcome using scheme provided by the invention, have many advantages, such as that versatile, adaptable, Consideration is comprehensive, scheme is reasonable, construction speed is fast, maintenance is simple, can be adjusted with the development of load, there are higher practical value and good market prospects.
Description
Technical field
The present invention relates to a kind of method of Operation of Electric Systems analysis and control field, in particular to a kind of raising is mostly logical
The method of road section ability to transmit electricity.
Background technology
The distribution of trend is distributed according to Kirchhoff's law according to line impedance size naturally in power grid, in order to make tide
Stream can be flowed according to the actual needs or dispatcher's wish of network load, it is necessary to it is next to possess a kind of practicable means
Control the trend on each circuit.In power grid, due to circuit construction and load development often not fully coordinate, mutual
Match, causes part circuit to be influenced by load distribution imbalance and grid structure, be chronically at overload, another part circuit
But it is likely to be at long-term light condition.Trend distribute it is unbalanced cause the uneconomical of operation of power networks, while it is also unreliable.Power grid is compeled
It is essential and wants a kind of effective power flow regulating method, can both meet the economy and controllability needs of operation of power networks, it can also be big
Width improves electric network transportation ability, improves the operational reliability of power grid.
Large-scale FACTS (Flexible AC transmission system) functions of the equipments are various, complicated, floor space is larger, disposably
Cost of investment is huge, also higher to professional technician's requirement of daily operation management and Maintenance and Repair, and in FACTS devices
The current reliability of the components such as Control protection system, power electronic devices and cooling system is not also very ideal.
Distributed serial coupled mode flow controller is a kind of typical D-FACTS (distributed FACTS) device, its volume
Small, light-weight, removable and distributing installation, relative inexpensiveness.Distributed serial coupled mode power flowcontrol technology includes mainly
Distributed control module and monitoring system two large divisions.Distributed control module does not need open-circuit line by reactor series connection
Enter, but sealing in for reactance or capacitive reactance is carried out by transformer coupled mode.The first side winding of coupling transformer is single turn
There is multiturn on transmission line of electricity, secondary side, are quickly controlled by solid combination switch.Due to being not necessarily to disconnect transmission line of electricity, without changing
Become original line construction, no occupation of land needs, and can control on the spot or remote control, simple and flexible, is easily installed and can be
Different circuits are reused, and cost and the more centralized FACTS devices of operating cost substantially reduce.
Invention content
The object of the present invention is to provide a kind of method improving multichannel section ability to transmit electricity, how most economical effective provide
Ground application distribution formula series coupled type power flowcontrol technology reduces its negative effect to improve multichannel section ability to transmit electricity.
By the simulation analysis to distributed serial compensating for coupling equipment application, distributed serial compensating for coupling putting equipment in service pair is given
The various aspects of system influence, and strong foundation is provided for systems organization, construction and the decision of operation.
In order to the embodiment to disclosure some aspects there are one basic understanding, simple summary is shown below.It 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.
The purpose of the present invention is what is realized using following technical proposals：
The present invention provides a kind of method improving multichannel section ability to transmit electricity, it is improved in that the method packet
Include following step：
A, the emulation data model of the typical big mode of power grid is established；
B, classify to transmission bottlenecks；
C, transmission cross-section the optimal compensation scheme is determined；
D, the suggested design of transmission cross-section is determined.
Further, in the step A, typical big mode refers to the big load method that is switched on greatly；It is selected need to improve it is defeated
After the section of electric energy power, the configuration side of distributed serial coupled mode reactor is designed according to line length, shaft tower quantity and span
Case, and the typical operation modes emulation data model for corresponding to research level year power grid is established using PSD-BPA softwares.
Further, in the step B, transmission bottlenecks are analyzed and is classified according to Crack cause, trend is unevenly distributed
The section of weighing apparatus sorts according to inequality extent；Selection trend is unevenly distributed weighing apparatus degree more than or equal to 2 and section load factor is more than
Section load factor is more than 90% transmission cross-section after 50% transmission cross-section or N-1.
Further, when transmission cross-section includes two channels, i.e. channel I and channel II, the calculating of inequality extent walks
It is rapid as follows：
B1) reality in the load factor=channel I in channel I it is active/electrode limit in channel I；
The reality in the load factor=channel II in channel II is active/electrode limit in channel II；
Section load factor=(reality in channel I is active+reality in channel II active)/(electrode limit+channel in channel I
II electrode limit)；
B2) if the load factor in channel I is more than the load factor in channel II, have：
The load factor in the load factor/channel II in inequality extent=channel I；
If the load factor in channel I is less than the load factor in channel II, have：
The load factor in the load factor/channel I in inequality extent=channel II.
Further, the Crack cause of transmission bottlenecks includes：1. since load growth causes ability to transmit electricity insufficient soon, formed
Transmission bottlenecks；2. voltage levels couple to form electromagnetic looped network with low-voltage-grade by transformer magnetic loop, transmission of electricity bottle is formed
Neck；3. causing the trend of system to be unevenly distributed weighing apparatus since the Thevenin's equivalence distribution of impedance of power grid is unbalanced, cause passway for transmitting electricity
The ability to transmit electricity of middle circuit cannot make full use of, and become short slab, form transmission bottlenecks.
Further, in the step C, after obtaining the section for needing to improve ability to transmit electricity, to needing to mend in transmission cross-section
The channel configuration distributed serial coupled mode reactor arrangement repaid, analysis and assessment application effect, including distributed serial coupled mode
Reactor arrangement to trend distribution, static security, transient stability, short circuit current, voltage power-less distribution, ability to transmit electricity, network loss and
Influence in terms of relay protection, finds out that section load factor is small less than 2, after N-1 so that Section Tidal Current of Power Transmission is unevenly distributed weighing apparatus degree
In 90% and the minimum scheme of compensation capacity, as the optimal compensation scheme.
Further, in the step D, the compensation scheme includes distributed compensation scheme, centralized series compensation side
Case and new route scheme；The step D includes the following steps：
D1) the distributed serial coupled mode reactor arrangement quantity determined according to optimal distribution formula compensation scheme calculates distribution
The construction of formula compensation scheme and operating cost, investment payback time；Wherein distributed serial coupled mode reactor arrangement is according to each
A 50,000 yuan of calculating；
D2 construction and the operating cost of centralized series compensation scheme and new route scheme, investment payback time) are calculated；For
Simplify and calculate, the new route cost is calculated by 2,000,000 yuan every kilometer, and the compensativity of centralized series compensation is based on 20%
It calculates, cost is calculated according to the 30% of new route scheme；
D3) for each transmission cross-section using distributed serial coupled mode reactor arrangement, above-mentioned three kinds of Integrated comparative
Scheme：In conjunction with distributed serial coupled mode reactor arrangement to trend distribution, static security, transient stability, short circuit current, voltage
Influence in terms of reactive power distribution, ability to transmit electricity, network loss and relay protection excludes to negatively affect big scheme；For technical feasibility,
It is less than the transmission cross-section of other two schemes using distributed serial coupled mode reactor cost, degree and throwing is saved according to cost
It provides payoff period length and engineering schedule is discharged, finally provide the distributed serial coupled mode reactor arrangement application containing engineering schedule and push away
Recommend scheme.
Compared with the immediate prior art, the excellent effect that technical solution provided by the invention has is：
1, the method for being usually used in improving ability to transmit electricity at present is mainly new route, using centralized series compensation, modification
Machine measure etc. is cut in protection definite value, the steady control of optimization.The method provided by the invention for improving multichannel section ability to transmit electricity can solve
The above method or expropriation of land is difficult or cost is too high or lacks flexibility and difficult in maintenance or excessively rely on management and running personnel's
The defects of personal experience.The present invention gives distributed string by the simulation analysis of distributed serial compensating for coupling equipment application
Joining compensating for coupling putting equipment in service influences the various aspects of system, for systems organization, construction and the decision of operation provide it is strong according to
According to.
2, the method provided by the invention for improving multichannel section ability to transmit electricity is strong with operability, Consideration is complete
Face, scheme is reasonable, Technological Economy is feasible, result of calculation is clearly practical, it is excellent to can be used in concrete guide Electric Power Network Planning and operation etc.
Point has higher practical value and good market prospects.
For above-mentioned and relevant purpose, one or more embodiments include being particularly described below and in claim
In the feature that particularly points out.Certain illustrative aspects are described in detail in the following description and the annexed drawings, and its instruction is only
Some modes in the utilizable various modes of principle of each embodiment.Other benefits and novel features will be under
The detailed description in face is considered in conjunction with the accompanying and becomes apparent, the disclosed embodiments be all such aspects to be included and they
Be equal.
Description of the drawings
Attached drawing is used to provide further understanding of the present invention, and a part for constitution instruction, the reality with the present invention
It applies example to be used to explain the present invention together, not be construed as limiting the invention.In the accompanying drawings：
Fig. 1 is the flow chart provided by the invention for improving multichannel section ability to transmit electricity embodiment.
Specific implementation mode
The specific implementation mode of the present 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 may include structure, logic, it is electrical, process and other change.Embodiment
Only represent possible variation.Unless explicitly requested, otherwise individual component and function are optional, and the sequence operated can be with
Variation.The part of some embodiments and feature can be included in or replace part and the feature of other embodiments.This hair
The range of bright embodiment includes equivalent obtained by the entire scope of claims and all of claims
Object.Herein, these embodiments of the invention can individually or generally be indicated that this is only with term " invention "
For convenience, it and if in fact disclosing the invention more than one, is not meant to automatically limit ranging from appointing for the application
What single invention or inventive concept.
The present invention provides a kind of method improving multichannel section ability to transmit electricity comprising following steps：
A, it establishes the typical big mode of power grid and emulates data model；Typical big mode refers to the big load method that is switched on greatly；Choosing
Surely after the section for needing raising ability to transmit electricity, distributed serial coupled mode electricity is designed according to line length, shaft tower quantity and span
The allocation plan of anti-device, and the typical operation modes emulation data for corresponding to research level year power grid are established using PSD-BPA softwares
Model.
B, transmission bottlenecks are analyzed and have been classified according to Crack cause,
Transmission bottlenecks are analyzed and classified according to Crack cause, when selecting transmission cross-section, are mainly considered damp in each channel
The inequality extent of flow distribution selects trend to be unevenly distributed the section that weighing apparatus degree is higher, trend is heavier；That is selection trend is distributed not
Balance degree is more than or equal to 2 and section load factor is defeated more than 90% more than section load factor after 50% transmission cross-section or N-1
Electric section.
When transmission cross-section includes two channels, i.e. channel I and channel II, steps are as follows for the calculating of inequality extent：
B1) reality in the load factor=channel I in channel I it is active/electrode limit in channel I；
The reality in the load factor=channel II in channel II is active/electrode limit in channel II；
Section load factor=(reality in channel I is active+reality in channel II active)/(electrode limit+channel in channel I
II electrode limit)；
B2) if the load factor in channel I is more than the load factor in channel II, have：
The load factor in the load factor/channel II in inequality extent=channel I；
If the load factor in channel I is less than the load factor in channel II, have：
The load factor in the load factor/channel I in inequality extent=channel II.
The Crack cause of transmission bottlenecks substantially there are three types of：The first is since load growth causes ability to transmit electricity insufficient soon；
Second is that voltage levels couple to form electromagnetic looped network with low-voltage-grade by transformer magnetic loop, to bottleneck occur；
The third is to cause the trend of system to be unevenly distributed weighing apparatus since the Thevenin's equivalence distribution of impedance of power grid is unbalanced, is caused certain defeated
The ability to transmit electricity of part line related cannot make full use of in electric channel, to become short slab, form transmission bottlenecks.
C, after obtaining the section for needing to improve ability to transmit electricity, to the distributed string of channel configuration for needing to compensate in transmission cross-section
Join coupled mode reactor arrangement, analysis and assessment application effect, including distributed serial coupled mode reactor arrangement to trend be distributed,
Influence in terms of static security, transient stability, short circuit current, voltage power-less distribution, ability to transmit electricity, network loss and relay protection, is looked for
Go out so that Section Tidal Current of Power Transmission is unevenly distributed weighing apparatus degree less than section load factor after 2, N-1 is less than 90% and compensation capacity is minimum
Scheme, as the optimal compensation scheme；
Small, light-weight, removable and distributing installation, the relative inexpensiveness of distributed serial coupled mode reactor.
The equipment autonomously takes energy, is series in circuit by the form of coupling, without occupation of land, is uniformly distributed, easily controllable, and can
It is adjusted with the development of load.
D, the respective distributed compensation scheme of comprehensive comparative analysis different section, centralized compensation scheme and newly-built line
The economy of road scheme provides suggested design and its engineering schedule, includes the following steps：
D1) the distributed serial coupled mode reactor arrangement quantity determined according to optimal distribution formula compensation scheme calculates distribution
The construction of formula compensation scheme and operating cost, investment payback time；Wherein distributed serial coupled mode reactor arrangement is according to each
A 50,000 yuan of calculating；
D2 construction and the operating cost of centralized series compensation scheme and new route scheme, investment payback time) are calculated；Its
In：The new route cost is calculated by 2,000,000 yuan every kilometer, and the compensativity of centralized series compensation is calculated by 20%, cost
It is calculated according to the 30% of new route scheme；
D3) for each transmission cross-section using distributed serial coupled mode reactor arrangement, above-mentioned three kinds of Integrated comparative
Scheme：In conjunction with distributed serial coupled mode reactor arrangement to trend distribution, static security, transient stability, short circuit current, voltage
Influence in terms of reactive power distribution, ability to transmit electricity, network loss and relay protection excludes to negatively affect big scheme；For technical feasibility,
It is less than the transmission cross-section of other two schemes using distributed serial coupled mode reactor cost, degree and throwing is saved according to cost
It provides payoff period length and engineering schedule is discharged, finally provide the distributed serial coupled mode reactor arrangement application containing engineering schedule and push away
Recommend scheme.
Embodiment
Fig. 1 is the flow chart for the embodiment that the present invention improves multichannel section ability to transmit electricity, and raising provided by the invention is more
The method of passage section ability to transmit electricity includes the following steps：
A, using the Liaoning electric power grid in Northeast China Power Grid as research object power grid, it is generous to establish Northeast China Power Grid summer typical case in 2013
Formula.2013, Liaoning electric power grid total installed capacity 39660MW, the whole province's supply load amounted to 21850MW.Interconnection situation：Distant kaolinite send China
Northern 1500MW；Covering east exchange send Liaoning about 3100MW, direct current to send Liaoning 2000MW；Send Liaoning about 3060MW in Jilin；West of Liaoning thermoelectricity
Send Liaoning Middle 470MW in base；Liaoning Middle power grid send Liao Nan about 1520MW.There are a large amount of 500kV/220kV electricity for Liaoning electric power grid
Magnet ring net, wherein there is transmission bottlenecks at 28.There are three the bottleneck sections that can be solved using series compensation method, is respectively：
Husky muddy and the muddy section of text, East Anshan are sent outside section by electric section and Qinghe power plant.
B, in the typical big mode of summer in 2013, dune ridge-Hun River double-circuit line active power 440.2MW, text at-it is muddy
River single back line active power 86MW, the section active power powered to Shenyang south add up to 526.2MW.If dune ridge-Hun River
N-1 occurs for circuit, and power flow transfer can cause another loop line road of dune ridge-Hun River to reach 340.8MW, be more than the steady limit of heat (340MW,
900A), and this eight-legged essay only has 137.6MW at-Hun River Line Flow.In order to meet N-1 service requirements, the husky muddy and muddy section of text
525MW or less within power must be limited in.Dune ridge-Hun River double-circuit line installs 60 grades of DSR equipment per loop line road to be made
Husky muddy and the muddy section of text ability to transmit electricity is increased to 561MW, improves 34.8MW.After the ability to transmit electricity of the section improves, normally
It disclosure satisfy that N-1 nonoverloads under typical summer big mode, and there are more operational safety nargin.
C, in the typical big mode of summer in 2013, Anshan-East Anshan double-circuit line active power 124.6MW, Cui Jia-
East Anshan single back line active power 67.3MW, Ningyuan village-East Anshan single back line active power 136.7MW, section wattful power
Rate adds up to 328.6MW.It unlinks if Wang Shi-Cui family's single back line cut-offs in Wang Shi 500kV substations and Anshan 500kV substations
Operation or Wang Shi-Cui family's single back line occur N-1 and cut-off, then the trend of Ningyuan village-East Anshan circuit is up to
215.1MW, active power margin are only 4.9MW.After Ningyuan village-East Anshan single back line installs 30 grades of DSR equipment, above-mentioned N-1 modes
Under active power margin can be increased to 21.6MW, improve about 16.7MW.Ningyuan village-East Anshan single back line trend reaches heat
When the steady limit, the trend of the section is total up to 365.6MW, than improving 27.4MW, i.e. ability to transmit electricity before the operation of DSR equipment
Improve 27.4MW.
D, in the typical big mode of summer in 2013,3 unit outputs of Qinghe power plant add up to 1000MW, Qinghe-Niu Gangxian
Road active power 126.9MW, Qinghe-Tieling power plant circuit active power 164.3MW, Qinghe-Kaiyuan double-circuit line wattful power
Rate 268.4MW, Qinghe-Shen east 220kV circuit active power 111.2MW, Qinghe-Shen east 500kV circuits active power-
30MW, Qinghe-Guo family circuit active power 41.2MW, Qinghe-Changtu double-circuit line active power 133.4MW, Qinghe-tiger
Shitai County double-circuit line active power 133MW, section active power add up to 950MW.On Qinghe-Kaiyuan line maintenance I loop lines road
Under mode, if N-1, i.e. N-1 maintenance modes, remaining Qinghe-Kaiyuan II loop lines road occur again for Qinghe-Tieling power plant circuit
Trend reaches 269.5MW, is more than the steady limit (266MW, 700A) of heat.In order to enable Qinghe-Kaiyuan one is returned compared with short-term under which
Road active power nonoverload, Qinghe power plant, which sends power outside, must be limited in 926MW or less.It is installed on Qinghe-Kaiyuan I loop lines road
After 20 grades of DSR equipment, Qinghe power plant sends power outside up to 1050MW, and 124MW is improved than originally.
E, after Qinghe power plant sends the DSR equipment operation of section outside, neighbouring unit generator rotor angle amplitude of variation is slightly less than DSR equipment fortune
Situation before row, associated bus voltage change amplitude are slightly less than the situation before the operation of DSR equipment, line related power flow changing amplitude
Situation about being slightly less than before the operation of DSR equipment；Total variation tendency is consistent.DSR operations improve the amplitude of stability about 1.61~
Between 11.2%.
F, after line short where DSR equipment, DSR equipment can automatically exit from operation, not influenced on system short-circuit electric current,
Even if without it is out of service if can slightly reduce short circuit current.After Qinghe power plant sends the DSR equipment operation of section outside, three-phase is short
Road electric current at most reduces about 0.206kA, is approximately equivalent to reduce 1%.
G, after Qinghe power plant sends the DSR equipment operation of section outside, the idle of circuit where DSR equipment reduces about
0.1Mvar, being equivalent to reduces about 0.67%.
H, in three application schemes after DSR operations, line impedance increase is 16%, 17% and 10% respectively, circuit resistance
For anti-calculated value compared with the corresponding line impedance of protection seting value, increase is 6.3%, 7.3% and 0.8% respectively, is being dispatched
In the acceptable and controllable range of operation.
I, while application scheme one, two, three, i.e. three sets of distributed serial coupled mode power flow control systems are run simultaneously, electricity
Net total network loss also only increases to 241.086MW from 241.025MW, and power loss increment only has 61kW, is equivalent to total network loss and increases
Add 0.025%.The 0.30 yuan of calculating of electric cost is often spent, because trend changes in distribution causes the increased annual operating and maintenance cost of network loss to be 200*
61*0.30=3660 members.
J, three sets of distributed serial coupled mode power flow control systems work at the same time, i.e. 510 in application scheme DSR equipment
When running simultaneously and entering working condition, total iron loss about increases 510kW, adds copper loss (each equipment about 100W), loss is not
More than 600kW.This some effects causes the increased year cost of network loss to be 200*600*0.30=36000 members.
K, the economic benefit for improving ability to transmit electricity has 200 hours heavy load trends to consider according to annual, increases trnamission capacity
100 yuan of calculating when transmission charges are pressed per megawatt.The investment of various DSR application schemes and its economic benefit for improving ability to transmit electricity
It is comprehensive as shown in table 1 below.
The investment of the application DSR equipment of table 1 and annual earnings
If L, pressing 2,000,000 using traditional new route scheme or centralized series compensation scheme, new route cost
Every kilometer of member calculates (this expense is paid for and taken without expropriation of land and young crops damage), and compensativity considers that cost is according to new route side by 20%
The 30% of case calculates.DSR application schemes and the investment ratio of other schemes are as shown in table 2 below.
The investment ratio of table 2 application DSR schemes and other schemes
Investment, operating cost and the technical maturity of each scheme of Integrated comparative, the engineering schedule for providing suggested design are：
1) section is sent for Qinghe power plant outside, it is proposed that use distributed serial compensation scheme, and preferentially build；
2) for East Anshan by electric section, it is proposed that use distributed serial compensation scheme；
3) for the husky muddy and muddy section of text, it is proposed that using centralized series compensation scheme.
The method of the present invention overcomes that new route cost is too high, series connection centralized compensation technology cost is high and difficult in maintenance
Etc. limitations, have it is versatile, adaptable, Consideration is comprehensive, scheme is reasonable, construction speed is fast, maintenance is simple, can
The advantages that being adjusted with the development of load has higher practical value and good market prospects.
It should be understood that the particular order or level of the step of during disclosed are the examples of illustrative methods.Based on setting
Count preference, it should be appreciated that in the process the step of particular order or level can be in the feelings for the protection domain for not departing from the disclosure
It is rearranged under condition.Appended claim to a method is not illustratively sequentially to give the element of various steps, and not
It is to be limited to the particular order or level.
In above-mentioned detailed description, various features are combined together in single embodiment, to simplify the disclosure.No
This published method should be construed to reflect such intention, that is, the embodiment of theme claimed needs clear
The more features of feature stated in each claim to Chu.On the contrary, that reflected such as appended claims
Sample, the present invention are in the state fewer than whole features of disclosed single embodiment.Therefore, appended claims is special
This is expressly incorporated into detailed description, and wherein each claim is used as alone the individual preferred embodiment of the present invention.
Described above includes the citing of one or more embodiments.Certainly, in order to describe above-described embodiment and description portion
The all possible combination of part or method is impossible, but it will be appreciated by one of ordinary skill in the art that each implementation
Example can do further combinations and permutations.Therefore, embodiment described herein is intended to cover fall into the appended claims
Protection domain in all such changes, modifications and variations.In addition, with regard to the term used in specification or claims
The mode that covers of "comprising", the word is similar to term " comprising ", just as " including " solved in the claims as link word
As releasing.In addition, the use of any one of specification in claims term "or" being to indicate " non-exclusionism
Or ".
Finally it should be noted that：The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, to the greatest extent
Invention is explained in detail with reference to above-described embodiment for pipe, and those of ordinary skill in the art still can be to this hair
Bright specific implementation mode is modified or replaced equivalently, these without departing from spirit and scope of the invention any modification or
Equivalent replacement, within the claims for applying for the pending present invention.
Claims (5)
1. a kind of method improving multichannel section ability to transmit electricity, which is characterized in that the method includes following step：
A, the emulation data model of the typical big mode of power grid is established；
B, classify to transmission bottlenecks；
C, transmission cross-section optimal distribution formula compensation scheme is determined；
D, the suggested design of transmission cross-section is determined；
In the step B, transmission bottlenecks are analyzed and are classified according to Crack cause, to trend be unevenly distributed the transmission cross-section of weighing apparatus by
It sorts according to inequality extent；Selection trend is unevenly distributed weighing apparatus degree more than or equal to 2 and transmission cross-section load factor is defeated more than 50%
Transmission cross-section load factor is more than 90% transmission cross-section after electric section or N-1 fault types；
When transmission cross-section includes two channels, i.e. channel I and channel II, steps are as follows for the calculating of inequality extent：
B1) reality in the load factor=channel I in channel I it is active/electrode limit in channel I；
The reality in the load factor=channel II in channel II is active/electrode limit in channel II；
Transmission cross-section load factor=(reality in channel I is active+reality in channel II active)/(electrode limit+channel in channel I
II electrode limit)；
B2) if the load factor in channel I is more than the load factor in channel II, have：
The load factor in the load factor/channel II in inequality extent=channel I；
If the load factor in channel I is less than the load factor in channel II, have：
The load factor in the load factor/channel I in inequality extent=channel II.
2. the method for improving multichannel section ability to transmit electricity as described in claim 1, which is characterized in that in the step A, allusion quotation
The big mode of type refers to the big load method that is switched on greatly；After the selected transmission cross-section for needing to improve ability to transmit electricity, according to line length,
The allocation plan of shaft tower quantity and span design distributed serial coupled mode reactor arrangement, and established using PSD-BPA softwares
The emulation data model of the big mode of typical case of corresponding research level year power grid.
3. the method for improving multichannel section ability to transmit electricity as described in claim 1, which is characterized in that the formation of transmission bottlenecks
Reason includes：1. since load growth causes ability to transmit electricity insufficient soon, transmission bottlenecks are formed；2. voltage levels and low-voltage etc.
Grade couples to form electromagnetic looped network by transformer magnetic loop, forms transmission bottlenecks；3. due to the Thevenin's equivalence impedance point of power grid
Cloth is unbalanced to cause the trend of system to be unevenly distributed weighing apparatus, causes the ability to transmit electricity of circuit in passway for transmitting electricity that cannot make full use of, at
For short slab, transmission bottlenecks are formed.
4. the method for improving multichannel section ability to transmit electricity as described in claim 1, which is characterized in that in the step C, obtain
After the transmission cross-section that must need raising ability to transmit electricity, distributed serial coupled mode is configured to the channel for needing to compensate in transmission cross-section
Reactor arrangement, analysis and assessment application effect, including distributed serial coupled mode reactor arrangement are distributed trend, static state is pacified
Entirely, the influence in terms of transient stability, short circuit current, voltage power-less distribution, ability to transmit electricity, network loss and relay protection, find out so that
Section Tidal Current of Power Transmission is unevenly distributed weighing apparatus degree and is less than 90% and compensation capacity less than transmission cross-section load factor after 2, N-1 fault types
Minimum scheme, be as optimally distributed formula compensation scheme.
5. the method for improving multichannel section ability to transmit electricity as described in claim 1, which is characterized in that in the step D, institute
It includes distributed compensation scheme, centralized series compensation scheme and new route scheme to state suggested design；Under the step D includes
State step：
D1) the distributed serial coupled mode reactor arrangement quantity determined according to optimal distribution formula compensation scheme calculates distributed mend
Repay construction and the operating cost of scheme, investment payback time；Wherein distributed serial coupled mode reactor arrangement according to each 50,000
Member calculates；
D2 construction and the operating cost of centralized series compensation scheme and new route scheme, investment payback time) are calculated；Wherein：
The new route scheme cost is calculated by 2,000,000 yuan every kilometer, and the compensativity of centralized series compensation scheme is calculated by 20%,
Cost according to new route scheme cost 30% calculate；
D3) for each transmission cross-section using distributed serial coupled mode reactor arrangement, the above-mentioned distributed benefit of Integrated comparative
Repay three kinds of scheme, centralized series compensation scheme and new route scheme schemes：It is set in conjunction with distributed serial coupled mode reactor
For to trend distribution, static security, transient stability, short circuit current, voltage power-less distribution, ability to transmit electricity, network loss and relay protection
The influence of aspect excludes to negatively affect big scheme；It is made for technical feasibility, using distributed serial coupled mode reactor arrangement
Valence is less than the transmission cross-section of other two schemes, saves degree according to cost and engineering schedule is discharged in investment payback time length, most
The distributed serial coupled mode reactor arrangement application suggested design containing engineering schedule is provided afterwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510152784.4A CN106159937B (en) | 2015-04-01 | 2015-04-01 | A method of improving multichannel section ability to transmit electricity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510152784.4A CN106159937B (en) | 2015-04-01 | 2015-04-01 | A method of improving multichannel section ability to transmit electricity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106159937A CN106159937A (en) | 2016-11-23 |
| CN106159937B true CN106159937B (en) | 2018-10-23 |
Family
ID=57337434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510152784.4A Active CN106159937B (en) | 2015-04-01 | 2015-04-01 | A method of improving multichannel section ability to transmit electricity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106159937B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111564846A (en) * | 2020-05-21 | 2020-08-21 | 国网江西省电力有限公司电力科学研究院 | Green scheduling-oriented power flow optimization control method |
| CN113224764B (en) * | 2021-06-06 | 2022-11-18 | 中国南方电网有限责任公司 | Device for dynamically adjusting power flow of power grid based on multistage fast switch and reactor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103123713A (en) * | 2012-11-08 | 2013-05-29 | 中国电力科学研究院 | Rack structure optimization method applicable to multiple direct current emergent power support |
| CN103346561A (en) * | 2013-07-08 | 2013-10-09 | 国家电网公司 | Generalized driving energy analysis method for vibration coupling of large regional power grid and provincial power grids |
| CN103414188A (en) * | 2013-08-29 | 2013-11-27 | 国家电网公司 | Optical configuration method of supergrid controllable phase shifter |
| CN103441493A (en) * | 2013-07-23 | 2013-12-11 | 广东电网公司电力调度控制中心 | Method for automatically selecting key sections on load side of electrical partition of power grid |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9270119B2 (en) * | 2013-05-24 | 2016-02-23 | Eaton Corporation | High voltage direct current transmission and distribution system |
-
2015
- 2015-04-01 CN CN201510152784.4A patent/CN106159937B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103123713A (en) * | 2012-11-08 | 2013-05-29 | 中国电力科学研究院 | Rack structure optimization method applicable to multiple direct current emergent power support |
| CN103346561A (en) * | 2013-07-08 | 2013-10-09 | 国家电网公司 | Generalized driving energy analysis method for vibration coupling of large regional power grid and provincial power grids |
| CN103441493A (en) * | 2013-07-23 | 2013-12-11 | 广东电网公司电力调度控制中心 | Method for automatically selecting key sections on load side of electrical partition of power grid |
| CN103414188A (en) * | 2013-08-29 | 2013-11-27 | 国家电网公司 | Optical configuration method of supergrid controllable phase shifter |
Non-Patent Citations (1)
| Title |
|---|
| 分布式串联电抗器原理及其应用分析;李再华等;《智能电网》;20141130;第2卷(第11期);第21-26页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106159937A (en) | 2016-11-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Chen et al. | A centralized reactive power compensation system for LV distribution networks | |
| CN104659780A (en) | Implementation method for absorbing energy source Internet of large-scale distributive power supplies | |
| CN108493998B (en) | Robust power transmission network planning method considering demand response and N-1 expected faults | |
| Thukaram et al. | Optimal reactive power dispatch in a large power system with AC–DC and FACTS controllers | |
| CN104156531A (en) | Fault current limiter distribution point optimization and capacity selection method taking operation loss into consideration | |
| CN112886641A (en) | Submarine cable power transmission system analysis model and reactive power configuration method | |
| CN106159937B (en) | A method of improving multichannel section ability to transmit electricity | |
| CN105762921B (en) | A kind of cyclization of based superconductive current limiter turns method of supplying power to | |
| CN105262104B (en) | The idle partition balancing control method of 10kV distribution lines containing distributed generation resource | |
| CN109888775A (en) | A kind of underrun day power grid structures optimization method considering wind power integration | |
| Li et al. | Multi-objective optimal control based on practical security region of regional integrated energy system | |
| CN103178551B (en) | Offshore oilfield group power grid power optimization control method | |
| Save et al. | PMU-based power system analysis of a medium-voltage distribution grid | |
| Wu et al. | The existed problems and possible solutions of micro-grid based on distributed generation | |
| CN109936142A (en) | Transmission & distribution integration network voltage autocontrol method and device | |
| Strbac et al. | Benefits of active management of distribution systems | |
| Zhao et al. | On-line voltage stability monitoring and control (vsmc) system in fujian power grid | |
| Zhen-gang et al. | Application of SSSC to improve the transmission capability of Tianjin 220kV power grid | |
| CN104377689A (en) | Loss reduction method and device for power distribution network | |
| Momoh et al. | Value-based implementation of distributed generation in optimal power flow | |
| Xin et al. | Research on Unified Power Flow Controller's Application Scheme in provincial power grid | |
| Sharma et al. | Stochastic voltage stability margin in unbalance feeder with fuzzy based distributed generation placement | |
| CN109390936B (en) | Regional power grid loss calculation method considering load flow adjustment of tie line | |
| Save et al. | Pmu-based power system analysis of a MV distribution grid | |
| Seif | Determining the optimal location and amount of distributed generation sources in an unbalanced radial distribution grid |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |