CN110474376A - Channel power optimal control method is sent out based on high proportion wind-powered electricity generation sending end power grid - Google Patents
Channel power optimal control method is sent out based on high proportion wind-powered electricity generation sending end power grid Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/48—Controlling the sharing of the in-phase component
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention discloses one kind to send out channel power optimal control method based on high proportion wind-powered electricity generation sending end power grid.Grid is divided according to the power swing degree of topological structure of electric and interconnection, in area, power swing minimum principle coordinated control source lotus is sent out with each area；It is up to target with entire power grid Transmission Corridor power transmission efficiency outside area, each area of optimal control contributes, and compared using operating parameter each before and after optimization method.Each area of optimal control sends out power outside each area's submitting power swing of the endogenous lotus coordinated control inhibition in area, area, and the two collective effect provides guidance because sending the problem of being obstructed outside caused by sending out channel power fluctuation for high proportion wind-powered electricity generation sending end power grid.
Description
Technical field
The present invention is to belong to alternating current interconnection power optimization field more particularly to high proportion wind-powered electricity generation sending end power grid submitting channel
Power optimization control method.
Background technique
With the construction of China's high proportion renewable energy source base, electric system is to wind power output fluctuation and randomness
Adaptability needs to be promoted.2017, Gansu Province accounted for new energy total power generation by transregional consumption new energy of sending outside transprovincially
27.38%, and wind-powered electricity generation send out channel power frequent fluctuation and significantly peak-valley difference not only can restricted influence interconnection transmission
Ability restricts wind-powered electricity generation and sends consumption outside, and will affect power quality, or even bring bad shadow to system safe and stable operation
It rings.However, with the decline of adjustable fossil capacity ratio, the simple difficulty by traditional thermoelectricity compensation interconnection fluctuation and peak-valley difference
It spends increasing.In this context, high proportion wind-powered electricity generation sending end power grid is subjected to subregion, inhibits subregion fluctuation to improve power grid submitting
Effective transmission power in channel is to alleviate wind-powered electricity generation to send out difficult effective way.
Domestic and international many experts and scholars have carried out correlative study with regard to dominant eigenvalues optimization problem, mostly consideration economy, peace
Quan Xing, but it is less from the research for sending out the orientation optimization dominant eigenvalues that fluctuation restriction wind-powered electricity generation in channel is sent outside.
Summary of the invention
The object of the present invention is to provide one kind to send out channel power optimal control side based on high proportion wind-powered electricity generation sending end power grid
Method, for solving the above problem existing for existing method.To achieve the above object, technical solution provided by the invention is one kind
Channel power optimal control method is sent out based on high proportion wind-powered electricity generation sending end power grid, it is characterized in that the described method comprises the following steps:
S1: dividing power grid according to the power swing degree of this topological structure of electric and interconnection, to fluctuate big crucial connection
Foundation of the winding thread as subregion；
S2: comprehensively considering source lotus operation characteristic, sends out power swing as principle to stabilize each area, formulates the endogenous lotus in area and coordinate
Control strategy；
S3: considering the control characteristic that power-balance constraint and each subregion externally show, defeated to maximize power grid submitting channel
Electrical efficiency is target, determines that each subregion sends out power；
S4: comparison sends out each operating parameter in channel power optimization method front and back using based on high proportion wind-powered electricity generation sending end power grid.
Preferably, the S1 the following steps are included:
S101: analysis topological structure of electric draws the higher main interconnection grid structure figure of voltage class；
S102: target grid is divided into N number of region according to the big crucial interconnection of transimission power fluctuating range.
Preferably, the S2 the following steps are included:
S201: the expectation power and anticipated capability a few days ago of interconnection are sent outside according to each area, each area is obtained and sends interconnection wave outside
Dynamic power；
S202: steady-sxtate wave motion power and spike fluctuating power are divided according to amplitude size；
S203: corresponding source lotus coordination control strategy is formulated for different fluctuating power types.
Preferably, the S3 the following steps are included:
S301: consider normal power supplies, the generated output of wind-powered electricity generation and the electric power of conventional load, high energy load, construction
Power-balance constraint in subregion；
S302: the adjustment parameter of analogy common power, while influence of the endogenous lotus in area to district grid performance is investigated, it constructs
The power output bound of each subregion constrains；
S303: the adjustment parameter of analogy common power, while influence of the endogenous lotus in area to district grid performance is investigated, it constructs
The regulating time of each subregion constrains；
S304: the adjustment parameter of analogy common power, while influence of the endogenous lotus in area to district grid performance is investigated, it constructs
The power output climbing rate of each subregion constrains；
S305: using the power transmission efficiency for maximizing power grid Transmission Corridor as optimization aim, the submitting power of each subregion is solved.
Preferably, the S4 the following steps are included:
S401: it calculates after determining that target grid uses optimization method, the power output of each subregion；
S402: it calculates and determines that target grid using after optimization method, is sent out the fluctuation mean square deviation in channel, peak-valley difference, sent outside
Electricity, power transmission efficiency and calculating speed, and with use optimization method before compare.
The present invention is that high proportion wind-powered electricity generation sending end power grid is mentioned because sending the problem of being obstructed outside caused by sending out channel power fluctuation
Guidance is supplied.
Detailed description of the invention
Below by drawings and examples, technical scheme of the present invention will be described in further detail.
Fig. 1 is the process of the present invention that channel power optimal control method is sent out based on high proportion wind-powered electricity generation sending end power grid
Figure；
Fig. 2 is the endogenous lotus coordination control strategy flow chart in area of the present invention；
Fig. 3 is Hexi Region of Gansu division result schematic diagram described in the embodiment of the present invention；
Fig. 4 is each subregion power curve figure described in the embodiment of the present invention；
Fig. 5 is the transmission electricity figure on Transmission Corridor after optimization described in the embodiment of the present invention；
Fig. 6 is the transmission electricity figure on Transmission Corridor before optimization described in the embodiment of the present invention.
Specific embodiment
In order to have a clear understanding of technical solution of the present invention, its detailed structure will be set forth in the description that follows.Obviously, originally
The specific execution of inventive embodiments is simultaneously insufficient to be limited to the specific details that those skilled in the art is familiar with.Preferred reality of the invention
It applies example to be described in detail as follows, in addition to these embodiments of detailed description, can also have other embodiments.
The present invention is described in further details with reference to the accompanying drawings and examples.
Embodiment 1
Fig. 1 is of the present invention based on high proportion wind-powered electricity generation sending end power grid submitting channel power optimal control method process
Figure.In Fig. 1, submitting channel power optimal control method provided by the invention, comprising the following steps:
S1: dividing power grid according to the power swing degree of this topological structure of electric and interconnection, to fluctuate big crucial connection
Foundation of the winding thread as subregion；
S2: comprehensively considering source lotus operation characteristic, sends out power swing as principle to stabilize each area, formulates the endogenous lotus in area and coordinate
Control strategy；
S3: considering the control characteristic that power-balance constraint and each subregion externally show, defeated to maximize power grid submitting channel
Electrical efficiency is target, determines that each subregion sends out power；
S4: comparison sends out each operating parameter in channel power optimization method front and back using based on high proportion wind-powered electricity generation sending end power grid.
The S1 the following steps are included:
S101: analysis topological structure of electric draws the higher main interconnection grid structure figure of voltage class；
S102: target grid is divided into N number of region according to the big crucial interconnection of transmission power fluctuating range.
The S2 the following steps are included:
S201: the anticipated capability a few days ago and desired power of interconnection are sent outside according to each area, each area is obtained and sends interconnection wave outside
Dynamic powerCalculation formula is
In formulaSend the anticipated capability a few days ago of interconnection t period outside for subregion n,Interconnection reference is sent outside for subregion n
The expectation power of the t period of relevant criterion adjusting；
S202: dividing steady-sxtate wave motion power and spike fluctuating power according to amplitude size, defines amplitude at [- 1% ,+1%]
Interconnection fluctuating power of sending outside be steady-sxtate wave motion power, be spike fluctuating power outside section；
S203: corresponding source lotus coordination control strategy is formulated for different fluctuating power types, sends connection outside to stabilize
The fluctuation of winding thread spike is target making high energy Load Regulation Strategy, and to stabilize, to send interconnection steady-sxtate wave motion outside normal as target making
It advises power supply and adjusts strategy.Strategic process figure is as shown in Figure 2.
The S3 the following steps are included:
S301: without loss of generality, when containing wind-powered electricity generation, water power, thermoelectricity and high energy load simultaneously in a subregion, construction
Power-balance constraint
In formula Chinese styleRespectively thermoelectricity, water power, wind-powered electricity generation the t period generated output；
The respectively electric power of high energy load and conventional load t period；Thn、Hyn、Wn、HighnPoint
It Wei not fired power generating unit, Hydropower Unit, wind power plant number and high energy load group number in subregion n；It is subregion n outside the t period
Send power.
S302: the adjustment parameter of analogy common power, while influence of the endogenous lotus in area to district grid performance is investigated, it constructs
The power output bound of each subregion constrains:
(1) power supply units limits
In formulaStart and stop state for thermoelectricity in the t period takes 1 as operation, and taking 0 is to shut down, similarlyRepresent water power
Start and stop state；It contributes for maximum, the minimum technology of fired power generating unit；When for Hydropower Unit t
Maximum, the minimum technology power output of section, are generally influenced by water, water level, vibrating area；For wind-powered electricity generation predicted value.
(2) high energy load switching capacity-constrained
In formulaMinimum, maximum investment capacity for high energy load in the t period, generally by load
The influence of the factors such as matter, the performance of enterprises.
(3) constraint of dominant eigenvalues limit is sent out
In formulaThe dominant eigenvalues upper limit is sent outside for subregion n.
To sum up, interconnection limit constraint outside the endogenous lotus operation constraint in area and area is taken into account, obtains subregion n in the power output of t period
The upper limit is
Power output lower limit be
S303: the adjustment parameter of analogy common power, while influence of the endogenous lotus in area to district grid performance is investigated, it constructs
The regulating time of each subregion constrains:
(1) thermoelectricity start-off time constraints
In formula, respectively inside subregion fired power generating unit the t period lasting booting and persistently shut down duration；
The respectively most short booting of fired power generating unit and most short shutdown duration.
(2) water power start-off time constraints
Symbol description is similar to thermoelectricity, repeats no more.
(3) high energy load switching time-constrain
In formulaSwitching state for subregion inside high energy load in the t period takes 1 as investment, takes 0 to cut off；Respectively continuous service and sustained interruption duration of the high energy load in the t period；Respectively
The most short operation of high energy load and most short interruptions duration.
S304: the adjustment parameter of analogy common power, while influence of the endogenous lotus in area to district grid performance is investigated, it constructs
The power output climbing rate of each subregion constrains:
(1) thermoelectricity ramping rate constraints
In formulaClimbing rate and the ratio of slope that swashes under fired power generating unit respectively.
(2) water power ramping rate constraints
Symbol description is similar to thermoelectricity, repeats no more.
S305: using the power transmission efficiency for maximizing power grid Transmission Corridor as optimization aim, solving the submitting power of each subregion,
Objective function are as follows:
η in formulaoutFor the power transmission efficiency for sending out channel, the total electric energy W transmitted equal to one day on Transmission CorridoroutIt is passed with maximum
Transmission of electricity energyThe ratio between.
The S4 the following steps are included:
S401: it is solved using programming evaluation software LINGO to channel power Optimized model is sent out, calculates and determine target
After power grid uses optimization method, the power output of each subregion；
S402: it calculates and determines that target grid using after optimization method, is sent out the fluctuation mean square deviation in channel, peak-valley difference, sent outside
Electricity, power transmission efficiency and calculating speed, and with use optimization method before compare.
Embodiment 2
The embodiment of the present invention uses high proportion wind-powered electricity generation sending end power grid --- and Hexi Corridor power grid winter in 2017 is typical
Day operation mode data are analyzed, using the west of a river=Wusheng 750kV Transmission Corridor as research object, provide based on high proportion wind
Electric sending end power grid sends out channel power optimal control method
S1: the analysis west of a river=Wusheng 750kV Transmission Corridor near region topological structure of electric draws the contact of 330kV or more
Gauze frame structure chart analyzes the trend of each interconnection, by the crucial contact big according to transimission power degree of fluctuation of near region power grid
Line (the red sand hill in the west of a river-, the west of a river-go up river bend, the bis- gulfs in the west of a river-, totally 3 crucial interconnections) is divided into 3 regions, and division result is such as
Shown in Fig. 3.
S2: on the basis of step S1, comprehensively considering source lotus operation characteristic, is to reduce 3 subregions submitting power swings
Principle carries out coordinated control to normal power supplies, wind-powered electricity generation and high energy load in area.
S3: according to interconnection power allowances adjusting subregion power output bound outside the endogenous lotus characteristic in area and area, as shown in table 1
(unit MW), while considering district grid time and ramping rate constraints.
The power output bound constraint of 1 subregion of table
Sending out channel power transmission efficiency with the west of a river=Wusheng 750kV is up to target, is solved using programming evaluation software LINGO
Channel power Optimized model is sent out, obtains the power output of each subregion, as shown in Figure 4.
S4: contributing according to each subregion, obtains execution and sends out the west of a river-Wusheng Transmission Corridor after channel power optimal control method
Power transmission amount (Fig. 5) inside and outside one day carries out image with the power transmission amount (Fig. 6) inside and outside the preceding west of a river of method-Wusheng Transmission Corridor one day that executes
Comparison, can visually see and inhibit power swing, increases and send electricity outside.The west of a river=Wusheng of optimization front and back is sent outside logical
Mean square deviation is fluctuated on road, peak-valley difference, one day send outside electricity and power transmission efficiency carry out data comparison, as shown in table 2.It can by table 2
Know, after optimal control method, hence it is evident that the west of a river=Wusheng is inhibited to send out the fluctuation on channel, reduce peak-valley difference.It benefits
In this, power transmission efficiency is obviously improved, and promotes the extensive consumption of sending end power grid wind resource.
Comparison before and after 2 west of a river of table=Wusheng Transmission Corridor power optimization
In terms of calculating speed, solving network-wide optimization scheme needs 383ms, and after carrying out subregion, decomposed domain is only needed
121ms knows that subregion calculating can substantially reduce and calculates the time, while being conducive to evade the case where globally optimal solution is not present.
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 referring to above-described embodiment for pipe, and those of ordinary skill in the art still can be to this hair
Bright specific embodiment is modified or replaced equivalently, these without departing from spirit and scope of the invention any modification or
Equivalent replacement is being applied within pending claims.
Claims (5)
1. one kind sends out channel power optimization method based on high proportion wind-powered electricity generation sending end power grid, which is characterized in that the submitting channel
Power optimization control method the following steps are included:
S1: dividing power grid according to the power swing degree of this topological structure of electric and interconnection, to fluctuate big crucial interconnection
Foundation as subregion；
S2: comprehensively considering source lotus operation characteristic, sends out power swing as principle to stabilize each area, formulates the endogenous lotus coordinated control in area
Strategy；
S3: considering the control characteristic that power-balance constraint and each subregion externally show, and sends out channel transmission of electricity effect to maximize power grid
Rate is target, determines that each subregion sends out power；
S4: comparison sends out each operating parameter in channel power optimization method front and back using based on high proportion wind-powered electricity generation sending end power grid.
2. it is according to claim 1 a kind of based on high proportion wind-powered electricity generation sending end power grid submitting channel power optimization method, it is special
Sign is, the S1 the following steps are included:
S101: analysis topological structure of electric draws the higher main interconnection grid structure figure of voltage class；
S102: target grid is divided into N number of region according to the big crucial interconnection of transmission power fluctuating range.
3. it is according to claim 1 a kind of based on high proportion wind-powered electricity generation sending end power grid submitting channel power optimization method, it is special
Sign is, the S2 the following steps are included:
S201: sending the anticipated capability a few days ago and desired power of interconnection outside according to each area, obtains each area and sends interconnection fluctuation function outside
RateCalculation formula is
In formulaSend the anticipated capability a few days ago of interconnection t period outside for subregion n,Interconnection is sent outside referring to related for subregion n
The expectation power of the t period of standard adjusting；
S202: dividing steady-sxtate wave motion power and spike fluctuating power according to amplitude size, defines amplitude in the outer of [- 1% ,+1%]
Sending interconnection fluctuating power is steady-sxtate wave motion power, is spike fluctuating power outside section；
S203: corresponding source lotus coordination control strategy is formulated for different fluctuating power types, sends interconnection outside to stabilize
Spike fluctuation is target making high energy Load Regulation Strategy, sends interconnection steady-sxtate wave motion outside as the conventional electricity of target making to stabilize
Source adjusts strategy.
4. it is according to claim 1 a kind of based on high proportion wind-powered electricity generation sending end power grid submitting channel power optimization method, it is special
Sign is, the S3 the following steps are included:
S301: without loss of generality, when containing wind-powered electricity generation, water power, thermoelectricity and high energy load simultaneously in a subregion, power is constructed
Constraints of Equilibrium
In formula Chinese styleRespectively thermoelectricity, water power, wind-powered electricity generation the t period generated output；Respectively
For the electric power of high energy load and conventional load t period；Thn、Hyn、Wn、HighnFired power generating unit, water in respectively subregion n
Motor group, wind power plant number and high energy load group number；Power is sent outside in the t period for subregion n；
S302: the adjustment parameter of analogy common power, while influence of the endogenous lotus in area to district grid performance is investigated, it constructs each
The power output bound of subregion constrains:
(1) power supply units limits
In formulaStart and stop state for thermoelectricity in the t period takes 1 as operation, and taking 0 is to shut down, similarlyRepresent the start and stop of water power
State；Pi ThMax、Pi ThMinIt contributes for maximum, the minimum technology of fired power generating unit；For the Hydropower Unit t period
Maximum, minimum technology power output, is generally influenced by water, water level, vibrating area；For wind-powered electricity generation predicted value；
(2) high energy load switching capacity-constrained
In formulaMinimum, maximum investment capacity for high energy load in the t period, generally by load character, enterprise
The influence of the factors such as industry benefit；
(3) constraint of dominant eigenvalues limit is sent out
In formulaThe dominant eigenvalues upper limit is sent outside for subregion n；
To sum up, interconnection limit constraint outside the endogenous lotus operation constraint in area and area is taken into account, obtains subregion n in the power output upper limit of t period
For
Power output lower limit be
S303: the adjustment parameter of analogy common power, while influence of the endogenous lotus in area to district grid performance is investigated, it constructs each
The regulating time of subregion constrains:
(1) thermoelectricity start-off time constraints
In formula, respectively inside subregion fired power generating unit the t period lasting booting and persistently shut down duration；Respectively
The most short booting of fired power generating unit and most short shutdown duration；
(2) water power start-off time constraints
Symbol description is similar to thermoelectricity, repeats no more；
(3) high energy load switching time-constrain
In formulaSwitching state for subregion inside high energy load in the t period takes 1 as investment, takes 0 to cut off；Respectively continuous service and sustained interruption duration of the high energy load in the t period；Respectively
The most short operation of high energy load and most short interruptions duration；
S304: the adjustment parameter of analogy common power, while influence of the endogenous lotus in area to district grid performance is investigated, it constructs each
The power output climbing rate of subregion constrains:
(1) thermoelectricity ramping rate constraints
In formulaClimbing rate and the ratio of slope that swashes under fired power generating unit respectively；
(2) water power ramping rate constraints
Symbol description is identical as thermoelectricity；
S305: using the power transmission efficiency for maximizing power grid Transmission Corridor as optimization aim, the submitting power of each subregion, target are solved
Function are as follows:
η in formulaoutFor the power transmission efficiency for sending out channel, the total electric energy W transmitted equal to one day on Transmission CorridoroutWith maximum transmitted electricity
EnergyThe ratio between.
5. it is according to claim 1 a kind of based on high proportion wind-powered electricity generation sending end power grid submitting channel power optimization method, it is special
Sign is, the S4 the following steps are included:
S401: it is solved using programming evaluation software LINGO to channel power Optimized model is sent out, calculates and determine target grid
After optimization method, the power output of each subregion；
S402: calculate determine target grid using after optimization method, send out the fluctuation mean square deviation in channel, peak-valley difference, send outside electricity,
Power transmission efficiency and calculating speed, and with use optimization method before compare.
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| CN111612267A (en) * | 2020-05-28 | 2020-09-01 | 国家电网公司西南分部 | Hydropower cluster delivery net rack optimization method considering distant view horizontal year |
| CN112688368A (en) * | 2021-01-05 | 2021-04-20 | 国网甘肃省电力公司电力科学研究院 | Source network coordination peak regulation method for power grid at transmitting end |
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