CN106505618B - The unit of wind power integration power grid controls decreasing loss method - Google Patents

The unit of wind power integration power grid controls decreasing loss method Download PDF

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Publication number
CN106505618B
CN106505618B CN201611046336.7A CN201611046336A CN106505618B CN 106505618 B CN106505618 B CN 106505618B CN 201611046336 A CN201611046336 A CN 201611046336A CN 106505618 B CN106505618 B CN 106505618B
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control unit
adjustment
wind power
sending end
load
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CN106505618A (en
Inventor
郭红林
刘文颖
王维洲
朱丹丹
杨列銮
李慧勇
景乾明
吕思琦
梁琛
郭鹏
秦睿
李亚龙
郑伟
叶湖芳
智勇
吕良
蔡万通
拜润卿
夏鹏
张建华
王方雨
张雨薇
彭晶
姚春晓
曾文伟
郭虎
王贤
许春蕾
张尧翔
李宛齐
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State Grid Corp of China SGCC
North China Electric Power University
State Grid Gansu Electric Power Co Ltd
Electric Power Research Institute of State Grid Gansu Electric Power Co Ltd
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State Grid Corp of China SGCC
North China Electric Power University
State Grid Gansu Electric Power Co Ltd
Electric Power Research Institute of State Grid Gansu Electric Power Co Ltd
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    • H02J3/386—
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/76—Power conversion electric or electronic aspects

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Abstract

本发明公开了风电接入电网的单元控制降损方法，以降损节能为目标，对控制单元进行协调控制，来降低网损，在已有的常规电源、高载能负荷、风电厂的并网位置和容量数据基础上，对各风电厂、常规电源与高载能负荷进行相应单元划分，合理地根据风电出力情况进行单元内和单元间常规电源与高载能负荷的功率协调，尽可能使网损降至最低。

The invention discloses a unit control loss reduction method for wind power connected to the power grid, aiming at reducing losses and saving energy, and performing coordinated control on control units to reduce network losses. On the basis of location and capacity data, the corresponding units are divided for each wind power plant, conventional power supply and high-capacity load, and the power coordination between the conventional power supply and high-capacity load within and between units is reasonably carried out according to the wind power output, so as to make as much as possible. Network loss is minimized.

Description

The unit of wind power integration power grid controls decreasing loss method
Technical field
The present invention relates to renewable energy utilizations and dispatching technique field, and in particular, to the unit of wind power integration power grid Control decreasing loss method.
Background technique
Extensive new energy rapidly develops in recent years, and energy shortage problem has been effectively relieved, but large-scale wind power is simultaneously simultaneously Net brings new challenge to economy operation of power grid so that access grid loss surge.Consider that large-scale wind power is nearby usually built Have high energy enterprise, and the process characteristic of high energy industry determines that it is smaller to the dependence of power quality, have it is good can Adjust, can break feature, can effectively respond and stabilize large-scale wind power fluctuation the influence caused by network loss.Accordingly, it is considered to High energy load is included in adjustable range, He Yuan is carried out and combines decreasing loss.
Summary of the invention
It is an object of the present invention in view of the above-mentioned problems, propose wind power integration power grid unit control decreasing loss method so that Network loss is reduced to minimum, and provide reference for the renewable energy management and running of power grid.
To achieve the above object, the technical solution adopted by the present invention is that: the unit of wind power integration power grid controls decreasing loss method, It specifically includes that
Step 1: according to geographical diagram, control unit being carried out to wind park, normal power supplies and high energy load and is drawn Point；
Step 2: according to each control unit wind park predicted value Pwi+jQwi, sending end normal power supplies planned value PGi0+jQGi0, it is high Carry can load put into operation capacity PLi0+jQLi0, receiving end normal power supplies planned value PGi1+jQGi1With carry can load put into operation capacity PLi1+ jQGi1, determine the adjustable extent and adjusting sequence of normal power supplies and high energy load；
Step 3: using loss minimization as target, coordinated control being carried out to each control unit, obtains the list of wind power integration power grid Member control decreasing loss method.
Further, control unit described in step 1 includes two nodes, defines the side that wind power stream is control unit To control unit division specifically includes, and flowing out node according to control unit direction definition wind power is control unit sending end, separately One node is control unit receiving end,
Described control unit sending end includes wind park Pwi+jQwi, normal power supplies PGi0+jQGi0With high energy load PLi0+ jQLi0；
Described control unit receiving end includes normal power supplies PGi1+jQGi1With high energy load PLi1+jQGi1；If being terminated with wind The wind park is then incorporated to next stage control unit sending end by power plant.
Further, the determination of adjustable extent specifically includes,
The constraint of normal power supplies unit output bound:
PG_mmin≤PG_m≤PG_mmax (1)
In formula: PG_mFor m platform unit output；PG_mminFor m platform unit output lower limit；PG_mmaxGo out for m platform unit The power upper limit；
The constraint of high energy load adjustment:
Switching period constraint to kth kind high energy load are as follows: the duration of up-regulation is not less thanIt is no more thanMathematical notation is as follows:
In formula:It is discrete variable for the adjustment state amount of high energy load k, 0 or 1 can only be taken.It takes in 0 representative not It adjusts, 1 representative is taken to raise；
Adjust count constraint
In formula: MkFor maximum allowable switching frequency of the high energy load k within dispatching cycle.
Further, the determination of adjusting sequence includes,
Since controlled plant increases transmission distance in controlled plant confrontation unit between unit, so it is single to carry out control first It is adjusted in first；The determination of adjusting sequence specifically includes in control unit:
Sending end source lotus regulated quantity P0=| PG0|+|PL0|, ignore the idle influence to network loss of wind-powered electricity generation, network loss after sending end is adjusted Are as follows:
In formula: P01+jQ01For line transmission power；U750For 750 high voltage side of transformer voltages；Rl01To transmit line resistance.
Receiving end source lotus regulated quantity P1=| PG1|+|PL1|, network loss after receiving end is adjusted are as follows:
Sending end receiving end regulated quantity is identical, i.e. P0=P1When, it is made the difference to obtain receiving end adjusting and sending end by formula (6) and formula (5) Adjust decreasing loss difference:
By formula (7) it is found that PwWhen ≠ 0, Δ P > 0, sending end regulating effect more preferably, therefore is preferentially adjusted in control unit and is sent End,
If normal power supplies, high energy load power loss sensitivity descending are arranged as (D in sending endi01,Di02,…,Di0N) N The normal power supplies adjusted, high energy load sum are participated in for control unit i sending end, with vector (Pi01,Pi02,…,Pi0N)TIt indicates Matching convention power supply, high energy Load Regulation power, then sending end decreasing loss value are as follows:
Δ PLoss_0=(Di01,Di02, …,Di0N) ×(Pi01,Pi02..., Pi0N)T (8)
Secondly control unit receiving end is adjusted according to adjusting method identical with control unit sending end:
If normal power supplies, high energy load power loss sensitivity descending are arranged as (D in receiving endi11,Di12,…,Di1M) M The normal power supplies adjusted, high energy load sum are participated in for control unit i receiving end, it is conventional to adjust receiving end according to power loss sensitivity descending Power supply, high energy load；With vector (Pi11,Pi12,…,Pi1M)TIndicate matching convention power supply, high energy Load Regulation power, then Receiving end decreasing loss value are as follows:
ΔPLoss_1=(Di11,Di12, … ,Di1M) × (Pi11,Pi12, … ,Pi1M)T (9)
Further, it is specifically included in step 3: according to each control unit wind park predicted value Pwi+jQwi, wind-powered electricity generation monthly average Power output ratio η determines that wind park is in additional issue state or subtracts hair-like state；
If wind park is in additional issue state, specific regulating step includes:
Step 31: if wind park is in additional issue state, calculating the network loss spirit of sending end normal power supplies, high energy Load Regulation amount Sensitivity successively decreases according to sensitivity and sequentially reduces sending end normal power supplies power output PGi0+jQGi0, increase high energy load capacity PLi0+ jQLi0, the sum of sending end regulated quantity absolute value is equal to wind-powered electricity generation additional issue amount, i.e. Δ Pwi=| Δ PGi0|+|ΔPLi0| when, it adjusts and stops；
Step 32: if wind park is in additional issue state, sending end regulating power is used up, and the sum of sending end regulated quantity absolute value is still small In wind-powered electricity generation additional issue amount, then the power loss sensitivity of receiving end normal power supplies, high energy Load Regulation amount is calculated, successively decreased sequentially according to sensitivity Reduce receiving end normal power supplies power output PGi1+jQGi1, increase high energy load capacity PLi1+jQLi1, regulated quantity is absolute in control unit The sum of value is equal to wind-powered electricity generation additional issue amount, i.e. Δ Pwi=| Δ PGi0|+|ΔPLi0|+|ΔPGi1|+|ΔPLi1| when, it adjusts and stops；
Step 33: if wind-powered electricity generation is issued additional, receiving end regulating power used up, be not able to satisfy still in control unit regulated quantity absolute value it It with equal to wind-powered electricity generation additional issue amount, then adjusts and closes on control unit sending end, increase due to closing on controlled plant in control unit confrontation unit Big transmission distance, adjusting efficiency reduces, so setting lower sensitivity limit, in control unit, to close on control unit regulated quantity exhausted Stop when being equal to wind-powered electricity generation additional issue amount or institute's adjusted position sensitivity lower than limit value to the sum of value；Regulated quantity is absolute in described control unit It is worth and closes on the sum of control unit regulated quantity absolute value i.e. equal to wind-powered electricity generation additional issue amount:
The n be closed on control unit i and sending end sensitivity be greater than limit value control unit number；
If wind park, which is in, subtracts hair-like state, network loss is higher than monthly average network loss, repeats step 31- step 33；Network loss is lower than the moon Average loss does not apply decreasing loss regulation measure on the basis of meeting electric system active balance, because when wind-powered electricity generation subtracts hair electricity consumption at This increase, it is appropriate to cut off high energy load.
The unit of the wind power integration power grid of various embodiments of the present invention controls decreasing loss method, has comprehensively considered normal power supplies and height The interaction coordination ability of energy two aspects of load is carried, first by carrying out dividing elements to actual electric network, then with loss minimization For target, adjustable extent, adjusting sequence are determined, then carried out in control unit, coordinated control between control unit, determine wind power integration The unit of power grid controls decreasing loss method, network loss is reduced to minimum, provides reference for power grid formulation renewable energy operation plan.
Detailed description of the invention
Attached drawing is used to provide further understanding of the present invention, and constitutes part of specification, with reality of the 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 that the unit of wind power integration power grid described in the embodiment of the present invention controls decreasing loss method schematic；
Fig. 2 is that the unit of wind power integration power grid described in the embodiment of the present invention controls the simplified electricity of decreasing loss method wind power integration Pessimistic concurrency control, that is, control unit model；
Fig. 3 is that the unit of wind power integration power grid described in the embodiment of the present invention controls decreasing loss method containing extensive renewable energy The Hexi Corridor electric network wiring scheme of source and high energy load；
Fig. 4 is that the unit of wind power integration power grid described in the embodiment of the present invention controls decreasing loss method Yumen-Jiuquan region electricity Network Geographical position wiring diagram；
Fig. 5 controls sweet under decreasing loss method different adjustment mode for the unit of wind power integration power grid described in the embodiment of the present invention Respectful network loss compares change curve with wind power output.
Specific embodiment
Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, it should be understood that preferred reality described herein Apply example only for the purpose of illustrating and explaining the present invention and is not intended to limit the present invention.
Specifically, on the basis of existing normal power supplies, high energy load, the grid-connected position of wind park and capacity data, Corresponding units division is carried out to each wind park, normal power supplies and high energy load, is reasonably carried out according to wind power output situation single The power coordination of first interior normal power supplies and high energy load between unit, minimizes network loss as far as possible.Specific implementation step Such as attached drawing 1.The unit control decreasing loss method of wind power integration power grid is to carry out coordination control to control unit using wastage reducing and energy saving as target System, to reduce network loss.The effect of this decreasing loss method is illustrated below with reference to the simplified electrical network model of wind power integration.
S1: according to geographical diagram, control unit division is carried out to wind park, normal power supplies and high energy load.
The S1 the following steps are included:
S101: control unit includes two nodes, and defining wind power flow direction is control unit direction；
S102: flowing out node according to control unit direction definition wind power is control unit sending end, and another node is control Unit receiving end processed.Control unit sending end includes wind park Pwi+jQwi, normal power supplies PGi0+jQGi0With high energy load PLi0+ jQLi0；Control unit receiving end includes normal power supplies PGi1+jQGi1With high energy load PLi1+jQGi1.Pay attention to such as being terminated with wind-powered electricity generation The wind park should be then incorporated to next stage control unit sending end by factory；
S2: according to each control unit wind park predicted value Pwi+jQwi, sending end normal power supplies planned value PGi0+jQGi0, high load Can load put into operation capacity PLi0+jQLi0, receiving end normal power supplies planned value PGi1+jQGi1, high energy load puts into operation capacity PLi1+jQGi1, Determine the adjustable extent and adjusting sequence of normal power supplies and high energy load.
1) adjustable extent
1. normal power supplies unit output bound constrains
PG_mmin≤PG_m≤PG_mmax (1)
In formula: PG_mFor m platform unit output；PG_mminFor m platform unit output lower limit；PG_mmaxGo out for m platform unit The power upper limit.
2. high energy load adjustment constrains
Switching period constraint to kth kind high energy load are as follows: the duration of up-regulation is not less thanIt is no more thanMathematical notation is as follows:
In formula:It is discrete variable for the adjustment state amount of high energy load k, 0 or 1 can only be taken.It takes in 0 representative not It adjusts, 1 representative is taken to raise.
Adjust count constraint
In formula: MkFor maximum allowable switching frequency of the high energy load k within dispatching cycle.
2) adjusting sequence
Since controlled plant increases transmission distance in controlled plant confrontation unit between unit, so unit should be carried out first Interior adjusting；Adjusting sequence can be derived from by following in control unit:
Sending end source lotus regulated quantity P0=| PG0|+|PL0|, ignore the idle influence to network loss of wind-powered electricity generation, network loss after sending end is adjusted Are as follows:
In formula: P01+jQ01For line transmission power；U750For 750 high voltage side of transformer voltages；Rl01To transmit line resistance.
Receiving end source lotus regulated quantity P1=| PG1|+|PL1|, network loss after receiving end is adjusted are as follows:
Sending end receiving end regulated quantity is identical, i.e. P0=P1When, receiving end adjusting can be obtained by formula (6)-(5) and sending end adjusting decreasing loss is poor Value:
By formula (7) it is found that PwWhen ≠ 0, Δ P > 0, sending end regulating effect more preferably, therefore is preferentially adjusted in control unit and is sent End.
If normal power supplies, high energy load power loss sensitivity descending are arranged as (D in sending endi01,Di02,…,Di0N) (N is control Unit i sending end processed participates in the normal power supplies adjusted, high energy load sum), with vector (Pi01,Pi02,…,Pi0N)TIt indicates to correspond to Normal power supplies, high energy Load Regulation power, then sending end decreasing loss value are as follows:
ΔPLoss_0=(Di01,Di02, … ,Di0N) × (Pi01,Pi02..., Pi0N)T (8)
Control unit receiving end adjusting method is identical as control unit sending end:
If normal power supplies, high energy load power loss sensitivity descending are arranged as (D in receiving endi11,Di12,…,Di1M) M The normal power supplies adjusted, high energy load sum are participated in for control unit i receiving end, it is conventional to adjust receiving end according to power loss sensitivity descending Power supply, high energy load；With vector (Pi11,Pi12,…,Pi1M)TIndicate matching convention power supply, high energy Load Regulation power, then Receiving end decreasing loss value are as follows:
ΔPLoss_1=(Di11,Di12, … ,Di1M) × (Pi11,Pi12,… ,Pi1M)T (9)
S3: using loss minimization as target, coordinated control is carried out to each control unit, obtains the unit control of wind power integration power grid Decreasing loss method processed.
The S3 the following steps are included:
S301: according to each control unit wind park predicted value Pwi+jQwi, wind-powered electricity generation monthly average contribute ratio η, determine wind park In issuing additional or subtract hair-like state；
S302: if wind-powered electricity generation is issued additional, the power loss sensitivity of sending end normal power supplies, high energy Load Regulation amount is calculated, according to sensitive Degree, which successively decreases, sequentially reduces sending end normal power supplies power output PGi0+jQGi0, increase high energy load capacity PLi0+jQLi0, sending end regulated quantity The sum of absolute value is equal to wind-powered electricity generation additional issue amount, i.e. Δ Pwi=| Δ PGi0|+|ΔPLi0| when, it adjusts and stops；
S303: if wind-powered electricity generation is issued additional, sending end regulating power is used up, and the sum of regulated quantity absolute value is still less than wind-powered electricity generation additional issue amount, then The power loss sensitivity for calculating receiving end normal power supplies, high energy Load Regulation amount successively decreases according to sensitivity and sequentially reduces the conventional electricity of receiving end Contribute P in sourceGi1+jQGi1, increase high energy load capacity PLi1+jQLi1, the sum of regulated quantity absolute value is equal to wind-powered electricity generation in control unit Additional issue amount, i.e. Δ Pwi=| Δ PGi0|+|ΔPLi0|+|ΔPGi1|+|ΔPLi1| when, it adjusts and stops；
S304: if wind-powered electricity generation is issued additional, receiving end regulating power is used up, and is not able to satisfy the sum of regulated quantity absolute value in control unit still It equal to wind-powered electricity generation additional issue amount, then adjusts and closes on control unit sending end, increase due to closing on controlled plant in control unit confrontation unit Transmission distance, adjusting efficiency reduces, so lower sensitivity limit should be arranged, in control unit, to close on control unit regulated quantity exhausted Wind-powered electricity generation additional issue amount is equal to the sum of value,
I.e.(n be and control unit i Close on and sending end sensitivity be greater than the control unit number of limit value) or institute's adjusted position sensitivity lower than limit value when stop；
S305: if wind-powered electricity generation subtracts hair, network loss is higher than monthly average network loss, repeats S302-S304；Network loss is lower than monthly average network loss, On the basis of meeting electric system active balance, it should mainly consider to meet high energy business electrical demand at this time.Because wind-powered electricity generation subtracts Electric cost increases when hair, can cut off high energy load in right amount.
It is the Hexi Corridor electric network wiring scheme containing extensive renewable energy and high energy load, with Gansu in Fig. 3 It is analyzed for 2014 Nian Dong great typical operation modes, the decreasing loss method of wind power integration power grid provided by the invention includes:
S1: according to geographical diagram, control unit division is carried out to wind park, normal power supplies and high energy load.
S101: Yumen-Jiuquan regional power grid geographical diagram such as Fig. 4.Selecting it is typical control unit, including jade Door, two, Jiuquan node, defining wind power flow direction is control unit direction；
S102: select Yumen area for possessing large-scale wind power and a small amount of normal power supplies as sending end；Possess thermoelectricity, wind Yumen-Jiuquan typical case's control unit is established as receiving end in the Jiuquan region of electric and large quantities of high energy industries.Pay attention to by Jiuquan Area's wind park is incorporated to next stage control unit sending end.
S2: according to control unit wind park predicted value Pwi+jQwi, sending end normal power supplies planned value PGi0+jQGi0, high energy Load puts into operation capacity PLi0+jQLi0, sending end normal power supplies planned value PGi1+jQGi1, high energy load puts into operation capacity PLi1+jQGi1, It determines the adjustable extent of normal power supplies and high energy load and adjusts target.The prosperous Xidan seat grid-connected 100MW of wind park of sending end, installation Capacity 201MW；The thermal power plant's off-grid operation of 5, Yumen, total installation of generating capacity 110MW；Yumen regional load is 60MW；Jiuquan region fire Power plant is numerous, by taking the thermoelectricity of Jiuquan as an example, 2 installed capacity 330MW units, and adjustable extent 0-330MW；Jiuquan thermoelectricity load is 58.24MW。
S3: using loss minimization as target, coordinated control is carried out to sending end receiving end in each control unit, obtains wind power integration The loss minimization method of operation.
S301: according to control unit wind park predicted value, wind-powered electricity generation monthly average contribute ratio, determine wind park be in additional issue or Subtract hair-like state.Sending end accesses 100MW wind-powered electricity generation (Gansu network loss value is 347.377MW), subtracts because raw data packets are in wind-powered electricity generation additional issue Critical state is sent out, so being now in additional issue state；
S302: normal power supplies 100MW, increase high energy 0MW are reduced in sending end respectively；It reduces normal power supplies 0MW, increase height Energy 100MW is carried, the sum of sending end regulated quantity absolute value is made to be equal to wind-powered electricity generation additional issue amount, i.e. Δ Pwi=| Δ PGi0|+|ΔPLi0|；
S303: normal power supplies 100MW, increase high energy 0MW are reduced in receiving end respectively；It reduces normal power supplies 0MW, increase height Energy 100MW is carried, the sum of receiving end regulated quantity absolute value is made to be equal to wind-powered electricity generation additional issue amount, i.e. Δ Pwi=| Δ PGi1|+|ΔPLi1|；
Statistics network loss situation of change is as follows:
Send receiving end decreasing loss contrast table
Decreasing loss effect is as shown in figure 5, from simulation result: sending end decreasing loss is adjusted in Yumen-Jiuquan typical case's control unit Effect is much better than receiving end.Successively decrease sequentially according to sensitivity, control sequence is Yumen thermoelectricity → Yumen load → Jiuquan heat in this element Electricity → Jiu Gang aluminium manufacturer.
Copy Yumen-Jiuquan control unit division methods, to west of a river power grid carry out dividing elements, be divided into " Dunhuang-Yumen ", " Yumen-Jiuquan ", " Jiuquan-west of a river ", " west of a river-Wusheng " 4 control units, as shown in Figure 2.Subtract the period of hair, net in wind-powered electricity generation Damage is generally below monthly average network loss and does not apply decreasing loss regulation measure on the basis of meeting power-balance.In wind-powered electricity generation additional issue Section, under different wind power output percentages, west of a river power grid is adjusted by following three kinds of regulative modes respectively:
1. adjusting normal power supplies, make Δ PG=Δ Pw；
2. adjusting high energy load, make Δ Pl=Δ Pw；
3. regulation unit makes Δ Pi=Δ Pw。
By simulation result it is found that under wind power integration, adjusting normal power supplies, high energy load and control unit respectively can have Effect reduces network loss.When the big hair of wind-powered electricity generation, decreasing loss advantage is highlighted in a manner of control unit.
Examples detailed above analysis shows: the unit of wind power integration power grid controls decreasing loss method, comprehensively considered normal power supplies and The interaction coordination ability of two aspects of high energy load, first by carrying out dividing elements to actual electric network, then most with network loss Small is target, determines adjustable extent, adjusting sequence, then carry out in control unit, coordinated control between control unit, finally determines wind It is electrically accessed the unit control decreasing loss method of power grid, network loss is can be effectively reduced, formulates renewable energy operation plan for power grid and mention For reference.
On the basis of existing normal power supplies, high energy load, the grid-connected position of wind park and capacity data, to each wind-powered electricity generation Factory, normal power supplies and high energy load carry out corresponding units division, are reasonably carried out according to wind power output situation in unit and single The power coordination of normal power supplies and high energy load, minimizes network loss as far as possible between member.Specific implementation step such as attached drawing 1. The present invention is used to provide reference for dispatching of power netwoks department reasonable arrangement renewable energy operation plan.
Finally, it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not intended to restrict the invention, Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features. All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention Within protection scope.

Claims (2)

1.风电接入电网的单元控制降损方法,其特征在于，包括以下步骤：1. A unit control loss reduction method for wind power access to a power grid is characterized in that, comprising the following steps: 步骤1：根据地理位置接线图，对风电厂、常规电源和高载能负荷进行控制单元划分；Step 1: According to the geographical location wiring diagram, divide the control unit of wind power plant, conventional power supply and high energy load; 步骤2：根据各控制单元风电厂预测值Pwi_fore+jQwi_fore、送端常规电源计划值PGi0+jQGi0、送端高载能负荷投运容量PLi0+jQLi0、受端常规电源计划值PGi1+jQGi1和受端高载能负荷投运容量PLi1+jQLi1，确定常规电源和高载能负荷的可调范围与调节顺序；Step 2: According to the predicted value P wi_fore +jQ wi_fore of the wind power plant of each control unit, the planned value of the conventional power supply at the sending end P Gi0 +jQ Gi0 , the high-energy load operation capacity of the sending end P Li0 +jQ Li0 , and the planned value of the conventional power supply at the receiving end P Gi1 +jQ Gi1 and the receiving end high-capacity load commissioning capacity P Li1 +jQ Li1 , determine the adjustable range and adjustment sequence of the conventional power supply and high-capacity load; 步骤3:以网损最小为目标，对各控制单元进行协调控制，得到风电接入电网的单元控制降损方法；Step 3: take the minimum network loss as the goal, carry out coordinated control to each control unit, and obtain the unit control loss reduction method for the wind power connection to the power grid; 步骤1中所述控制单元包括两个节点，定义风电功率流向为控制单元的方向，控制单元划分具体包括，根据控制单元方向定义，风电功率流出节点为控制单元送端，另一节点为控制单元受端，In step 1, the control unit includes two nodes, and the wind power flow direction is defined as the direction of the control unit. The division of the control unit specifically includes, according to the definition of the direction of the control unit, the wind power outflow node is the control unit sending end, and the other node is the control unit. receiving end, 所述控制单元送端包括风电厂、常规电源与高载能负荷；The sending end of the control unit includes a wind power plant, a conventional power source and a high-energy load; 所述控制单元受端包括常规电源与高载能负荷；若受端接有风电厂，则将该风电厂并入下一级控制单元送端；The receiving end of the control unit includes conventional power supply and high-energy load; if the receiving end is connected with a wind power plant, the wind power plant is merged into the sending end of the next-level control unit; 步骤2中，可调范围的确定具体包括，In step 2, the determination of the adjustable range specifically includes, 常规电源机组出力上下限约束：Conventional power unit output upper and lower limit constraints: PG_mmin≤PG_m≤PG_mmax (1)P G_mmin ≤P G_m ≤P G_mmax (1) 式中：PG_m为第m台机组出力；PG_mmin为第m台机组出力下限；PG_mmax为第m台机组出力上限；In the formula: P G_m is the output of the m-th unit; P G_mmin is the output lower limit of the m-th unit; P G_mmax is the output upper limit of the m-th unit; 高载能负荷调整约束：High-capacity load adjustment constraints: 对第k种高载能负荷的投切时段约束为：The switching period constraint for the kth high-capacity load is: 式中：为高载能负荷k第t时段的调节状态量、为高载能负荷k在第i时段的调节状态量，是离散变量，只能取0或1，取0代表不上调，取1代表上调，分别为最小及最大上调持续时间对应的时段数；where: is the adjustment state quantity of the high-energy load k in the t-th period, is the adjustment state quantity of the high-energy load k in the i-th period, It is a discrete variable, which can only be 0 or 1, 0 means no increase, 1 means increase, are the number of time periods corresponding to the minimum and maximum up-duration respectively; 调节次数约束Constraints on the number of adjustments 式中：Mk为高载能负荷k在调度周期内的最大允许投切次数；In the formula: M k is the maximum allowable switching times of the high-capacity load k in the scheduling period; 调节顺序的确定包括，The determination of the adjustment sequence includes, 由于控制单元间调节对象相对控制单元内调节对象增大了输电距离，所以首先进行控制单元内调节；控制单元内调节顺序的确定具体包括：Since the adjustment objects between the control units increase the transmission distance relative to the adjustment objects in the control unit, the adjustment within the control unit is performed first; the determination of the adjustment sequence within the control unit specifically includes: 送端源荷调节量ΔPi0＝|ΔPLi0|+|ΔPGi0|，忽略风电无功对网损的影响，送端调节后网损为：The source load adjustment value of the sending end is ΔP i0 = |ΔP Li0 |+|ΔP Gi0 |, ignoring the influence of wind power reactive power on the network loss, the network loss after the sending end adjustment is: 式中：ΔPGi0、ΔPLi0分别为送端常规电源、高载能负荷有功调节量，大于0为有功功率增加，小于0为有功功率减小；Uli0为线路送端电压；Rli01为传输线电阻；In the formula: ΔP Gi0 and ΔP Li0 are the regular power supply at the sending end and the active power regulation of the high-capacity load , respectively, greater than 0 means the active power increases, and less than 0 means the active power decreases; U li0 is the line sending end voltage; R li01 is the transmission line resistance; 受端源荷调节量ΔPi1＝|ΔPLi1|+|ΔPGi1|，受端调节后网损为：The source load adjustment amount at the receiver end is ΔP i1 = |ΔP Li1 |+|ΔP Gi1 |, and the network loss after the receiver end adjustment is: 式中：ΔPGi1、ΔPLi1分别为受端常规电源、高载能负荷有功调节量，大于0为有功功率增加，小于0为有功功率减小；Uli1为线路受端电压；In the formula: ΔP Gi1 and ΔP Li1 are the active power regulation of the conventional power supply at the receiving end and the high-capacity load, respectively, greater than 0 means the active power increases, and less than 0 means the active power decreases; U li1 is the line receiving terminal voltage; 送端受端调节量相同，即ΔPi0＝ΔPi1时，由公式(6)与公式(5)做差得到受端调节与送端调节网损差值，这里忽略线路电压降，令Uli0＝Uli1，有，When the adjustment amount of the sending end and the receiving end is the same, that is, when ΔP i0 = ΔP i1 , the difference between the receiving end adjustment and the sending end adjustment can be obtained by the difference between the formula (6) and the formula (5). Here, the line voltage drop is ignored, and U li0 =U li1 , there is, 由式(7)可知，Pwi≠0时，ΔP＞0，送端调节效果更佳，因此控制单元内优先调节送端；It can be seen from formula (7) that when P wi ≠ 0, ΔP > 0, the adjustment effect of the sending end is better, so the sending end is preferentially adjusted in the control unit; 设送端内常规电源、高载能负荷网损灵敏度降序排列为(Di01,Di02,…,Di0N)，(Di01,Di02,…,Di0N)为行向量，所述N为控制单元i送端参与调节的常规电源、高载能负荷总数，以列向量(Pi01,Pi02,…,Pi0N)T表示对应送端常规电源、高载能负荷调节功率，则送端降损值为：Suppose the conventional power supply and high load energy load network loss sensitivity in the sending end are arranged in descending order as (D i01 , D i02 ,..., D i0N ), (D i01 , D i02 ,..., D i0N ) is a row vector, and the N is The total number of conventional power supply and high-capacity load that the sending end of control unit i participates in regulation, and the column vector (P i01 , P i02 ,…, P i0N ) T represents the regulation power of the conventional power supply and high-capacity load corresponding to the sending end, then the sending end The loss reduction value is: ΔPLoss_0＝(Di01,Di02,…,Di0N)×(Pi01,Pi02，…，Pi0N)T (8)ΔP Loss_0 =(D i01 ,D i02 ,...,D i0N )×(P i01 ,P i02 ,...,P i0N ) T (8) 其次对控制单元受端按照与控制单元送端相同的调节方法进行调节：Secondly, adjust the receiving end of the control unit according to the same adjustment method as the sending end of the control unit: 设受端内常规电源、高载能负荷网损灵敏度降序排列为(Di11,Di12,…,Di1M)，(Di11,Di12,…,Di1M)为行向量，所述M为控制单元i受端参与调节的常规电源、高载能负荷总数，依网损灵敏度降序调节受端常规电源、高载能负荷；以列向量(Pi11，Pi12，…，Pi1M)T表示对应受端常规电源、高载能负荷调节功率，以网损灵敏度行向量乘以调节功率列向量得到受端降损值，即：Assume that the conventional power supply and high-energy load network loss sensitivity in the receiving end are arranged in descending order as (D i11 , D i12 ,…,D i1M ), (D i11 ,D i12 ,…,D i1M ) is a row vector, and the M is The total number of conventional power supplies and high-capacity loads that the receiving end of the control unit i participates in regulating, adjusts the conventional power supplies and high-capacity loads at the receiving end in descending order of network loss sensitivity; represented by a column vector (P i11 , P i12 , ..., P i1M ) T Corresponding to the conventional power supply at the receiving end and the adjustment power of the high load energy load, the loss reduction value of the receiving end is obtained by multiplying the row vector of the network loss sensitivity by the column vector of the adjusted power, namely: ΔPLoss_1＝(Di11,Di12,…,Di1M)×(Pi11,Pi12,…,Pi1M)T (9)。ΔP Loss_1 = (D i11 , D i12 , . . . , D i1M )×(P i11 , P i12 , . . . , P i1M ) T (9). 2.根据权利要求1所述的风电接入电网的单元控制降损方法，其特征在于，步骤3中具体包括：根据各控制单元风电厂预测值Pwi_fore+jQwi_fore、风电月平均出力比例η，确定风电厂处于增发状态或减发状态；2. The unit control loss reduction method for connecting wind power to a power grid according to claim 1, wherein step 3 specifically includes: according to the predicted value P wi_fore +jQ wi_fore of each control unit wind power plant, the average monthly output ratio η of wind power , to determine whether the wind power plant is in the state of increase or decrease; 若风电厂处于增发状态，则具体调节步骤包括：If the wind power plant is in the state of additional generation, the specific adjustment steps include: 步骤31：若风电厂处于增发状态，ΔPwi为风电增发量，计算送端常规电源、高载能负荷调节量的网损灵敏度，依灵敏度递减顺序减小送端常规电源计划值PGi0+jQGi0、增大高载能负荷投运容量PLi0+jQLi0，为保证有功平衡，送端调节量绝对值之和等于风电增发量，即ΔPwi＝|ΔPLi0|+|ΔPGi0|时，调节停止；Step 31: If the wind power plant is in the state of additional generation, ΔP wi is the additional wind power generation amount, calculate the network loss sensitivity of the conventional power supply at the sending end and the adjustment amount of the high-capacity load, and decrease the planned value of the conventional power supply at the sending end P Gi0 +jQ in the order of decreasing sensitivity Gi0 , increase the operational capacity P Li0 +jQ Li0 of the high-capacity load, in order to ensure the active power balance, the sum of the absolute value of the adjustment amount at the sending end is equal to the additional wind power generation, that is, when ΔP wi = |ΔP Li0 |+|ΔP Gi0 | adjust stop; 步骤32：若风电厂处于增发状态，送端调节能力用尽，送端调节量绝对值之和仍小于风电增发量，则计算受端常规电源、高载能负荷调节量的网损灵敏度，依灵敏度递减顺序减小受端常规电源计划值PGi1+jQGi1、增大高载能负荷投运容量PLi1+jQLi1，为保证有功平衡，控制单元内调节量绝对值之和等于风电增发量，即ΔPwi＝|ΔPLi0|+|ΔPGi0|+|ΔPLi1|+|ΔPGi1|时，调节停止；Step 32: If the wind power plant is in the state of additional generation, the adjustment capacity of the sending end is exhausted, and the sum of the absolute value of the adjustment amount of the sending end is still less than the additional wind power generation amount, calculate the network loss sensitivity of the conventional power supply of the receiving end and the adjustment amount of the high-energy load, according to In the decreasing order of sensitivity, reduce the planned value P Gi1 +jQ Gi1 of the conventional power supply at the receiving end, and increase the operational capacity of the high-capacity load P Li1 +jQ Li1 . In order to ensure the active power balance, the sum of the absolute values of the adjustment values in the control unit is equal to the additional wind power generation. , that is, when ΔP wi =|ΔP Li0 |+|ΔP Gi0 |+|ΔP Li1 |+|ΔP Gi1 |, the adjustment stops; 步骤33：若风电增发，受端调节能力用尽，仍不能满足控制单元内调节量绝对值之和等于风电增发量，则调节临近控制单元送端，由于临近控制单元相对控制单元内调节对象增大了输电距离，调节效率降低，所以设置灵敏度下限，控制单元内、临近控制单元调节量绝对值之和等于风电增发量或所调位置灵敏度低于限值时停止；所述控制单元内调节量绝对值与临近控制单元调节量绝对值之和等于风电增发量即：Step 33: If the wind power is additionally generated, the adjustment capacity of the receiving end is exhausted, and the sum of the absolute value of the adjustment amount in the control unit cannot be satisfied to be equal to the additional wind power generation amount, then adjust the sending end of the adjacent control unit. When the transmission distance is increased, the adjustment efficiency is reduced, so the lower limit of the sensitivity is set, and the sum of the absolute value of the adjustment amount in the control unit and the adjacent control unit is equal to the additional wind power generation amount or when the sensitivity of the adjusted position is lower than the limit value, stop; the adjustment amount in the control unit The sum of the absolute value and the absolute value of the adjustment amount of the adjacent control unit is equal to the additional wind power generation amount, namely: 所述n为与控制单元i临近且送端灵敏度大于限值的控制单元数；The n is the number of control units that are adjacent to control unit i and whose sending end sensitivity is greater than the limit value; 若风电厂处于减发状态，网损高于月平均网损，重复步骤31-步骤33；网损低于月平均网损，在满足电力系统有功平衡的基础上，不施加降损调节措施，因风电减发时用电成本增加，适量切除高载能负荷。If the wind power plant is in the state of power reduction and the network loss is higher than the monthly average network loss, repeat steps 31 to 33; if the network loss is lower than the monthly average network loss, on the basis of satisfying the active power balance of the power system, no loss reduction adjustment measures are applied. Due to the increase in the cost of electricity when wind power is reduced, the high-energy load should be appropriately removed.
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103580063A (en) * 2013-11-13 2014-02-12 国家电网公司 Large-scale grid-connected wind power consumption method based on demander response
CN104300533A (en) * 2014-10-11 2015-01-21 国家电网公司 Power grid loss reduction method using high-energy loads to absorb wind power in layers
CN104376412A (en) * 2014-11-11 2015-02-25 国家电网公司 High energy-consuming enterprise peak regulation control method used in new energy power generation mode
CN105470987A (en) * 2015-12-23 2016-04-06 华北电力大学 Load-source coordination control based renewable energy day-ahead plan correction method
CN105720576A (en) * 2016-03-24 2016-06-29 国家电网公司 High-energy load and conventional power source coordinated loss reduction control method

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE0950190A1 (en) * 2009-03-25 2010-09-26 Ge Wind Energy Norway As Diversity cabinet

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103580063A (en) * 2013-11-13 2014-02-12 国家电网公司 Large-scale grid-connected wind power consumption method based on demander response
CN104300533A (en) * 2014-10-11 2015-01-21 国家电网公司 Power grid loss reduction method using high-energy loads to absorb wind power in layers
CN104376412A (en) * 2014-11-11 2015-02-25 国家电网公司 High energy-consuming enterprise peak regulation control method used in new energy power generation mode
CN105470987A (en) * 2015-12-23 2016-04-06 华北电力大学 Load-source coordination control based renewable energy day-ahead plan correction method
CN105720576A (en) * 2016-03-24 2016-06-29 国家电网公司 High-energy load and conventional power source coordinated loss reduction control method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
考虑最优风电投标量的高载能用户电价决策模型;胡殿刚 等;《电网技术》;20160613;全文

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