CN102624034A - Wind power station dispatching fit type idle work operation method suitable for high voltage power grid - Google Patents
Wind power station dispatching fit type idle work operation method suitable for high voltage power grid Download PDFInfo
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Abstract
The invention provides a wind power station dispatching fit type idle work operation method suitable for a high voltage power grid, which comprises adding an interface between power dispatching and a wind power station idle work control system, and enabling the voltage regulating requirement of power dispatching to be converted into an idle work control command of a wind power station, so that the wind power station participates in active voltage regulation on purpose, the randomness and aimlessness of the idle work operation of an existing wind power station, voltage fluctuation is effectively suppressed, and the voltage dispatching decision-making difficulties are reduced. The method is used for solving the problem of voltage regulating and control of a wind power station access point and adjacent power grid nodes during wind power station connection period of the high voltage power grid, improves the condition of lack of fit between existing wind power station idle work power operation and power grid voltage regulation, achieves the active voltage regulation of the wind power station based on practical power grid characteristics and operation requirements, and enables the power grid to accept more clean wind energy power generation. Simultaneously, the method is simple in principle, easy to operate, small in investment, not high in achieving difficulty and capable of being effectively popularized.
Description
Technical field
The present invention relates to the idle operation method of electric power system, particularly a kind of idle operation of wind energy turbine set and control method that is applicable to that high pressure is incorporated into the power networks.
Background technology
Along with going deep into of intelligent grid construction, distributed power generation replaces generation modes such as original little thermoelectricity, diesel engine just gradually, and is expected to substitute a part of traditional firepower and hydroelectric power generation.Distributed power generation is in one of trend of China, is to be incorporated into the power networks gradually to the development of being incorporated into the power networks of extensive voltage levels by original low capacity low-voltage grade.Simultaneously, the addressing of distributed power generation also gradually by the inland to coastal waters even deep-sea regional development.In China, offshore wind farm has become one of emphasis that distributed power generation further develops.Yet when bringing clean energy resource electric power for electrical network, distributed power generation has also brought some negative effects.Wherein, batch-type distributed power generations such as wind-powered electricity generation, solar power generation are that the operation of electrical network has brought more uncertain, and to the traffic control of electrical network, security of operation has proposed stern challenge.
Idle operation of wind energy turbine set and voltage-regulation are that one of problem of paying close attention to is most dispatched in present operation of power networks.China is the GB GB/T 19963-2011 " wind energy turbine set inserts the power system technology regulation " (hereinafter referred " GB ") of issue in 2011 about wind farm grid-connected national standard.GB requires wind energy turbine set should utilize the idle regulating power of self as far as possible; Dispose reactive-load compensation equipment in case of necessity to guarantee to satisfy the part or all of reactive requirement of wind energy turbine set self, primary substation and line attachment, the point voltage that keeps simultaneously being incorporated into the power networks meets the line voltage service requirement.In addition, GB also require double-fed that wind energy turbine set installs and direct-drive type speed-changing draught fan power factor should leading 0.95～dynamic adjustable between 0.95 lags behind.Can find out; China's GB regulation shows loose slightly; Flexibility during the wind energy turbine set operation is high; But also make the idle output of wind energy turbine set have very big uncertainty and no purpose simultaneously, can not play autotelic supporting role, increased the difficulty of line voltage scheduling decision simultaneously the reactive voltage operation of electrical network.
The present invention is incorporated into the idle in service of wind energy turbine set to the decision-making of voltage of power scheduling through the form that increases interface; Thereby make wind energy turbine set can cooperate the voltage scheduling line voltage to be monitored in real time and participated in initiatively pressure regulation; Help to improve voltage fluctuation problem and scheduling decision difficulty under wind farm grid-connected, make electrical network can admit more clean wind energy generating.
Summary of the invention
In order to solve the voltage scheduling difficulty under wind farm grid-connected, suppress voltage ripple of power network, make electrical network can admit more wind power generation, the present invention proposes the idle operation of wind energy turbine set and the control method that are applicable to that high pressure is incorporated into the power networks.This method increases interface between power scheduling and wind energy turbine set powerless control system; Make the pressure regulation demand of power scheduling can convert the idle control command of wind energy turbine set into; Thereby make wind energy turbine set on purpose participate in initiatively pressure regulation; Avoid the randomness and no purpose of the idle operation of present wind energy turbine set, can effectively suppress voltage fluctuation, reduced voltage scheduling decision difficulty.
A kind of idle operation method of wind energy turbine set scheduling fitting-type that is applicable to high-voltage fence may further comprise the steps:
(1) the power scheduling parameter that is provided with of wind energy turbine set scheduling fitting-type interface in the time period that sets objectives: at first; Power scheduling is to the electrical network rack of current slot; Through keeping load constant meritorious constant with wind energy turbine set; And change wind energy turbine set is idle exerts oneself, the voltage variety that calculates wind energy turbine set access point in the idle operational objective time period and wind energy turbine set are exported the ratio of reactive power variable quantity, i.e. the voltage influence factor K of wind energy turbine set reactive power; Secondly, provide the working voltage scope [V of wind energy turbine set
Min, V
Max], once more, according to voltage security of operation needs or economic pressure regulation needs, the object run voltage V of wind energy turbine set in the idle operational objective time period is formulated in scheduling
Obj, reach the minimum pressure regulation ability Δ V that wind energy turbine set should have
Min, maximum pressure regulation ability Δ V
MaxAt last, confirm the idle allocation model of wind-powered electricity generation machine and the control time interval delta T of the idle runnable interface of wind energy turbine set scheduling fitting-type;
(2) the idle runnable interface of wind energy turbine set scheduling fitting-type judges whether the current time be positioned at the object time section of scheduling formulation, if not, other parameter settings of then not accepting to dispatch; If the current time is positioned at the object time section that scheduling is formulated, other that then accept to dispatch are provided with parameter, and with its parameter that is provided with as the idle runnable interface of wind energy turbine set scheduling fitting-type; Said other are provided with parameter and comprise: the voltage influence factor K of wind energy turbine set reactive power, the object run voltage V of wind energy turbine set
Obj, the minimum pressure regulation ability of wind energy turbine set Δ V
Min, the maximum pressure regulation ability of wind energy turbine set Δ V
Max, wind energy turbine set operational voltage upper limit V
Max, wind energy turbine set working voltage lower limit V
Min, the idle allocation model of wind-powered electricity generation machine of the idle runnable interface of wind energy turbine set scheduling fitting-type, the control time interval delta T of the idle runnable interface of wind energy turbine set scheduling fitting-type;
(3) the idle runnable interface of wind energy turbine set scheduling fitting-type is provided with parameter is monitored access point voltage and each blower fan of wind energy turbine set in the object time section meritorious output according to described in (2); Begin in each control time interval delta T, calculate total reactive requirement Q of wind energy turbine set according to the point voltage that is incorporated into the power networks;
(4) obtain after total reactive requirement Q of wind energy turbine set, the idle allocation model of wind-powered electricity generation machine according to being provided with is assigned to the wind-powered electricity generation machine with reactive requirement; The wind-powered electricity generation machine export on request or absorbing reactive power with regulation voltage;
(5) the idle runnable interface of wind energy turbine set scheduling fitting-type judges whether the current time be in the object time section, if then return step (3); If, then do not return step (1).
In the above-mentioned idle operation method of wind energy turbine set scheduling fitting-type that is applicable to high-voltage fence; The idle runnable interface of described wind energy turbine set scheduling fitting-type is to instruct as parameter with the pressure regulation of power system dispatching department, converts wind farm grid-connected point voltage and the meritorious output of blower fan into interface that the wind energy turbine set reactive power is instructed.Because the powerless control system of wind energy turbine set is quick, online; And the decision-making of traffic department is an off-line, relatively slow; Therefore, between need be set up an interface, makes the decision-making of traffic department can be reflected in the control of powerless control system of wind energy turbine set and goes.
In the above-mentioned idle operation method of wind energy turbine set scheduling fitting-type that is applicable to high-voltage fence, the minimum pressure regulation ability Δ V that said wind energy turbine set should have
MinWith maximum pressure regulation ability Δ V
MaxBe power scheduling department according to electric power netting safe running in the object time section or economical operation needs, the voltage-regulation of the wind energy turbine set of being formulated must be able to cause in theory and the minimum voltage variable quantity and the maximum voltage variable quantity of site.
In the above-mentioned idle operation method of wind energy turbine set scheduling fitting-type that is applicable to high-voltage fence, said voltage security of operation need refer to the object run voltage V through the wind energy turbine set of adjusting
ObjMake working voltage the safest in theory, it is minimum that the out-of-limit probability of voltage takes place; Under this voltage security of operation requires, get the object run voltage V of wind energy turbine set
ObjBe in the working voltage scope [V of wind energy turbine set
Min, V
Max] mid point.
In the above-mentioned idle operation method of wind energy turbine set scheduling fitting-type that is applicable to high-voltage fence, the idle allocation model of wind-powered electricity generation machine of the idle runnable interface of said wind energy turbine set scheduling fitting-type comprises following two kinds of patterns:
Pattern one, mean allocation
Total reactive requirement is shared out equally every typhoon motor;
The simple distribution of pattern two, the meritorious constraint of consideration,
In general, meritorious output is many more, the idle regulating power of wind-powered electricity generation machine just more a little less than.Therefore, can consider to let the less wind-powered electricity generation machine of meritorious output bear more voltage-regulation task, the more wind-powered electricity generation machine of meritorious output is born less voltage-regulation task, thereby reaches the purpose of reasonable distribution reactive requirement.It realizes that principle is following:
False wind motor meritorious and idle linear, and when total reactive requirement be correct time (and sending idle), when meritorious zero of wind-powered electricity generation machine was sent out, the wind-powered electricity generation machine sent and specified active power P
NSuitable idle of numerical value; When gaining merit of wind-powered electricity generation machine completely sent out, the wind-powered electricity generation machine sent Q
0Idle; When total reactive requirement when negative (and absorbing idle), when meritorious zero of wind-powered electricity generation machine was sent out, the wind-powered electricity generation machine absorbed and 1.25 times of specified active power P
NSuitable idle of numerical value; When gaining merit of wind-powered electricity generation machine completely sent out, the wind-powered electricity generation machine absorbed Q
1Idle.Then have
Wherein, P
iBe the meritorious output of i typhoon machine, N is the blower fan number.
Then idle being output as of i typhoon machine
This pattern is controlled comparatively reasonable under specific circumstances, but precision is very poor when the total meritorious output of wind energy turbine set is very little, should switch to pattern one.Simultaneously, when reactive requirement greater than NP
NThe time, also should switch to pattern one.
Compare with the idle operation method of existing wind energy turbine set, the present invention has following advantage:
(1) the present invention is incorporated into the idle in service of wind energy turbine set with the decision-making of power scheduling first, makes wind energy turbine set participate in initiatively pressure regulation, not only can suppress voltage fluctuation, can also make voltage operate in reasonable levels simultaneously.
(2) institute of the present invention extracting method builds on the current wind energy turbine set powerless control system, makes that the wind energy turbine set powerless control system is very valuable to be replenished.Need not to increase electric equipment and invest the particularly huge investment of dynamic passive compensation equipment, method is simple, can be adapted for software easily to realize automatic operation, is convenient to promote.
(3) the present invention possesses from becoming excellent characteristic, and longer control of the time that is applied to move effect is good more.
Description of drawings
Fig. 1 is the idiographic flow sketch map that is applicable to the idle operation method of wind energy turbine set scheduling fitting-type of high-voltage fence.
Fig. 2 be before the ocean wind energy turbine set under big mode and little mode, idle relation of exerting oneself with foreign next stop high side voltage.
Embodiment
Below in conjunction with accompanying drawing and instance practical implementation of the present invention is described further, but enforcement of the present invention and protection are not limited thereto.
The idle operation method of wind energy turbine set scheduling fitting-type that is applicable to high-voltage fence comprises:
(1) the power scheduling parameter that is provided with of wind energy turbine set scheduling fitting-type interface in the time period that sets objectives: at first, calculate the voltage influence factor K of wind energy turbine set reactive power; Secondly, by the working voltage scope [V that provides wind energy turbine set by GB GB/T 19963-2011 " wind energy turbine set inserts the power system technology regulation "
Min, V
Max].Once more, according to management and running safety or economic pressure regulation needs, the object run voltage V of wind energy turbine set in the idle operational objective time period is formulated in scheduling
Obj, reach the minimum pressure regulation ability Δ V that wind energy turbine set should have
Min, maximum pressure regulation ability Δ V
MaxAt last, confirm the idle allocation model of wind-powered electricity generation machine of the idle runnable interface of wind energy turbine set scheduling fitting-type and the control time interval delta T of the idle runnable interface of wind energy turbine set scheduling fitting-type.
Wind energy turbine set is to the influence of line voltage, mainly is that the voltage to wind energy turbine set access point and near grid nodes thereof influences.In the ordinary course of things; The voltage of electrical network is similar to the trend that is linear growth with the increase of the reactive power that wind energy turbine set is sent; The increase of the reactive power that absorbs with wind energy turbine set is similar to and is linear downward trend, and promptly the variable quantity of the caused line voltage of wind energy turbine set unit's idle work variable quantity is a constant.Defining this parameter is the voltage influence factor K of wind energy turbine set reactive power.
Because in the high-voltage fence, impedance ratio is very little, can think that gaining merit of wind energy turbine set is very little to voltage influence, so the computational methods of the voltage influence factor K of wind energy turbine set reactive power do
Wherein, V
2Send out for wind energy turbine set meritorious zero, reactive power is pressed rated power P
NThe voltage of when numerical values recited is sent and site, V
1Be meritorious, the idle all voltage of zero when sending out and site of wind energy turbine set.
Working voltage scope [the V of wind energy turbine set
Min, V
Max] can provide by operating standard or relevant national standard.At present, GB GB/T 19963-2011 " wind energy turbine set inserts the power system technology regulation " has clear and definite regulation to the voltage range of operation of wind farm grid-connected point.To the also site of 110kV and above electric pressure thereof, wind energy turbine set operational voltage upper limit V
Max, wind energy turbine set working voltage lower limit V
MinBe respectively 1.07,0.97 times of rated voltage.
The object run voltage V of wind energy turbine set in the section
ObjCan adjust by following two kinds of methods.
1) if considers the stable state safe operation of voltage, the object run voltage V of the wind energy turbine set of can adjusting as follows
Obj
Wherein, V
MinBe wind energy turbine set working voltage lower limit, V
MaxBe the wind energy turbine set operational voltage upper limit.
2) if consider the economical operation of voltage, the object run voltage V of the wind energy turbine set of then can adjusting as follows
ObjShould adjust according to the conclusion that methods such as idle work optimization calculating draw.
Introduce the minimum pressure regulation ability Δ V of wind energy turbine set below
Min, maximum pressure regulation ability Δ V
Max
Consider the constraint of wind-powered electricity generation machine internal structure, when the wind-powered electricity generation machine is in different conditions following time, the idle output limit of wind-powered electricity generation machine also has difference.In general, meritorious output is few more, and the idle regulating power of wind-powered electricity generation machine is just strong more; Meritorious output is many more, the idle regulating power of wind-powered electricity generation machine just more a little less than.In order to make the maximum pressure regulation ability of wind-powered electricity generation machine performance, the idle output limit in the time of can considering zero of the setting of maximum pressure regulation ability and wind energy turbine set is corresponding, and the idle output limit the when setting of minimum pressure regulation ability completely sent out with wind energy turbine set is corresponding.But this set more complicated, the idle output limit of general variable speed constant frequency blower fan is at 1.5 times rated power P
NAbout, to minimum pressure regulation ability Δ V
Min, maximum pressure regulation ability Δ V
MaxSetting can be decided according to the actual requirements, only otherwise exceeding this limit gets final product.
Confirm the problem that considered two aspects are set of the control time interval delta T of the idle runnable interface of wind energy turbine set scheduling fitting-type.The one, control precision, the more little control precision of control time interval delta T is high more; The 2nd, the idle control rate of blower fan, the control time interval delta T should enough can be adjusted to desired quantity with idle output so that assurance wind-powered electricity generation machine is interior at this moment greatly.
The idle allocation model of wind-powered electricity generation machine of the idle runnable interface of wind energy turbine set scheduling fitting-type will specify in the back.Lectotype one under the default situations.
(2) the idle runnable interface of wind energy turbine set scheduling fitting-type is accepted the object time section setting that scheduling is provided with.Judge whether the current time is the object time section that scheduling is formulated, if not, other parameter settings of then not accepting to dispatch; If for whether the current time is the object time section that scheduling is formulated, other that then accept to dispatch are provided with parameter, and with its parameter that is provided with as the idle runnable interface of wind energy turbine set scheduling fitting-type.Other are provided with parameter and comprise: the voltage influence factor K of wind energy turbine set reactive power, the object run voltage V of wind energy turbine set
Obj, the minimum pressure regulation ability of wind energy turbine set Δ V
Min, the maximum pressure regulation ability of wind energy turbine set Δ V
Max, wind energy turbine set operational voltage upper limit V
Max, wind energy turbine set working voltage lower limit V
Min, the idle allocation model of the wind-powered electricity generation machine of the idle runnable interface of wind energy turbine set scheduling fitting-type, the control time interval delta T of the idle runnable interface of wind energy turbine set scheduling fitting-type.
(3) the idle runnable interface of wind energy turbine set scheduling fitting-type is provided with parameter is monitored access point voltage and each blower fan of wind energy turbine set in the object time section meritorious output according to described in (2).Begin at interval in each control time, calculate total reactive requirement Q of wind energy turbine set according to the point voltage that is incorporated into the power networks.
The principle of the idle runnable interface of wind energy turbine set scheduling fitting-type is following:
The idle runnable interface of wind energy turbine set scheduling fitting-type at first limits total idle the exerting oneself of wind energy turbine set and regulates in a less operation area according to grid voltage change.When voltage was higher, wind energy turbine set was sent idle to support voltage; When voltage is low,, wind energy turbine set descends thereby absorbing the idle voltage that makes.
At first total reactive requirement of wind energy turbine set can be confirmed the idle permission output area [Q that current voltage is corresponding by following formula
VMin, Q
VMax].
Wherein, Q is total reactive requirement of wind energy turbine set.Total reactive requirement Q of wind energy turbine set representes the reactive power that wind energy turbine set is sent during for positive number, representes the reactive power that wind energy turbine set absorbs during for negative.V is the point voltage that is incorporated into the power networks.
Maximum reactive power Q
Max, minimum reactive power Q
MinThen by maximum pressure regulation ability Δ V
MaxWith minimum pressure regulation ability Δ V
MinObtain through converting.
Be the idle regulation and control reservation nargin of wind-powered electricity generation machine, Q
MaxShould be greater than 1.25 times wind energy turbine set installed capacity.When exceeding, should suitably adjust maximum pressure regulation ability Δ V
Max, minimum pressure regulation ability Δ V
MinSetting.
Obtain total reactive requirement scope [Q of wind energy turbine set
VMin, Q
VMax] after, consider that idle ability of regulation and control when wind energy turbine set was completely sent out a little less than, and zero ability of regulation and control when sending out is stronger.Total reactive requirement Q needs to decide according to the meritorious output of wind energy turbine set.
Wherein, P
WTBe wind energy turbine set installed capacity, P
OBe the meritorious output of current wind energy turbine set.
(4) obtain after total reactive requirement Q of wind energy turbine set, the idle allocation model of wind-powered electricity generation machine according to being provided with is assigned to the wind-powered electricity generation machine with reactive requirement.The wind-powered electricity generation machine export on request or absorbing reactive power with regulation voltage.
Confirmed after total reactive requirement Q that the idle output of every typhoon motor distributes and can be undertaken by following two kinds of patterns: pattern one, mean allocation; The simple distribution of pattern two, the meritorious constraint of consideration, this pattern is controlled comparatively reasonable under specific circumstances, but precision is very poor when total output of gaining merit of wind energy turbine set is very little, should switch to pattern one.Simultaneously, when reactive requirement during, also should switch to pattern one greater than NPN.
(5) the idle runnable interface of wind energy turbine set scheduling fitting-type judges whether the current time be in the object time section, if then return step (3); If, then do not return step (1).
Below being an example of calculation shows of the inventive method, is that example is carried out simulation calculation with 110kV of Zhanjiang City in 2010 and above upper strata electrical network.Zhanjiang electrical network comprised 1 500kV transformer station in 2010,10 220kV transformer stations, 74 110kV transformer stations, and a wind energy turbine set, i.e. wind energy turbine set before the ocean.Its installed capacity is 49.5MW, boosts after the 110kV circuit inserts the new small house of 110kV station.
Fig. 1 has reflected the idiographic flow of the idle operation method of wind energy turbine set scheduling fitting-type that is applicable to high-voltage fence.The practical implementation step is following:
1) Zhanjiang power scheduling parameter that is provided with of the idle runnable interface of wind energy turbine set scheduling fitting-type in the time period that sets objectives;
2) the idle runnable interface of wind energy turbine set scheduling fitting-type judges whether the current time be positioned at the object time section of scheduling formulation before the ocean, if not, other parameter settings of then not accepting to dispatch; Otherwise, then be accepted as the parameter setting.
3) the idle runnable interface of wind energy turbine set scheduling fitting-type is according to 2) described in parameter is monitored access point voltage and each blower fan of wind energy turbine set in the object time section meritorious output is set.In each time interval, calculate total reactive requirement of wind energy turbine set according to the point voltage that is incorporated into the power networks
4) obtain after total reactive requirement of wind energy turbine set, the idle allocation model of wind-powered electricity generation machine according to being provided with is assigned to the wind-powered electricity generation machine with reactive requirement.The wind-powered electricity generation machine export on request or absorbing reactive power with regulation voltage.
5) the idle runnable interface of wind energy turbine set scheduling fitting-type judges whether the current time be in the object time section, if then return step 3); If, then do not return step 1).
Fig. 2 reflected foreign before wind energy turbine set under big mode and little mode, idle relation of exerting oneself with foreign next stop high side voltage.It is thus clear that the voltage influence COEFFICIENT K of wind energy turbine set reactive power is between 0.25-0.26kV.For making wind energy turbine set performance maximum effect, value 0.26kV.
According to GB GB/T 19963-2011 " wind energy turbine set inserts the power system technology regulation " requirement, the operational voltage upper limit V of wind farm grid-connected point before the ocean
MaxBe 117.7kV, working voltage lower limit V
Min106.7kV.In order to make the point voltage that is incorporated into the power networks have maximum steady operation margin of safety, get object run voltage V
ObjThe mean value of getting the working voltage bound is 112.2kV.Simultaneously, the maximum pressure regulation ability that wind energy turbine set is set is 2kV, and minimum pressure regulation ability is 0.5kV;
It is following that other of power scheduling department are provided with parameter:
The wind-powered electricity generation machine reactive requirement allocation model of the idle runnable interface of wind energy turbine set scheduling fitting-type adopts pattern one, i.e. mean allocation.The object run time period is 14:00～14:30, because time period length is merely 30min, the network load in the time changes little, helps effective operation of the idle runnable interface of wind energy turbine set scheduling fitting-type.The control time interval delta T is set to 5s, time period domestic demand control 360 times.
Subsequently, power scheduling sends to wind energy turbine set scheduling fitting-type interface with the above parameter that is provided with.
Wind energy turbine set scheduling fitting-type interface receiving scheduling is sent is provided with parameter.Suppose that the current time is 14:00:00, then the current time is positioned at the object time section, and wind energy turbine set scheduling fitting-type interface accepts to dispatch parameter being set and adopting the new argument operation of sending.
Next, the idle runnable interface of wind energy turbine set scheduling fitting-type detects and is incorporated into the power networks point voltage and the meritorious output of wind energy turbine set and calculates the reactive power that every typhoon motor should be exported, and every 10s once controls.
To suppose respectively that below current network load situation is light load and two kinds of situation of heavy load, show the control result of the idle runnable interface of wind energy turbine set scheduling fitting-type.Suppose that simultaneously exerting oneself of wind energy turbine set is 0MW and constant at short notice, and the initial idle of wind energy turbine set is output as 0.
Under light load, the time dependent situation of the voltage of wind farm grid-connected point is as shown in table 1.
The time dependent situation of wind farm grid-connected point voltage under table 1 light load
Under heavy load, the time dependent situation of wind farm grid-connected point voltage is as shown in table 2.
The time dependent situation of wind farm grid-connected point voltage under table 2 heavy load
By table 1,2 visible, by China, Denmark's guide rule operation, the voltage of wind energy turbine set is change at random in a scope, and wind energy turbine set can't guarantee self voltage, more can't improve voltage.Under heavy load, also make voltage have out-of-limit danger according to Chinese guide rule.
Visible by table 1, under light load, adopt the idle operation method operation of wind energy turbine set scheduling fitting-type after, the point voltage that the is incorporated into the power networks nearly 1kV that descends, voltage security of operation nargin improves.Visible by table 2, under heavy load, adopt the idle operation method operation of wind energy turbine set scheduling fitting-type, the point voltage that the is incorporated into the power networks nearly 0.5kV that rises, more more near target voltage 112.2kV, security of operation nargin improved voltage.
Can prove that by above execution mode example the idle operation method of wind energy turbine set scheduling fitting-type can initiatively carry out pressure regulation according to the scheduling needs, improves the security of operation nargin of the point voltage that is incorporated into the power networks, and can improve the deficiency of the idle operation of current wind energy turbine set.Simultaneously, the enforcement of this method is simple, the easy realization.
Claims (7)
1. a wind energy turbine set that is applicable to high-voltage fence is dispatched the idle operation method of fitting-type, it is characterized in that may further comprise the steps:
(1) the power scheduling parameter that is provided with of wind energy turbine set scheduling fitting-type interface in the time period that sets objectives: at first; Power scheduling is to the electrical network rack of current slot; Through keeping load constant meritorious constant with wind energy turbine set; And change wind energy turbine set is idle exerts oneself, the voltage variety that calculates wind energy turbine set access point in the idle operational objective time period and wind energy turbine set are exported the ratio of reactive power variable quantity, i.e. the voltage influence factor K of wind energy turbine set reactive power; Secondly, provide the working voltage scope [V of wind energy turbine set
Min, V
Max], once more, according to voltage security of operation needs or economic pressure regulation needs, the object run voltage V of wind energy turbine set in the idle operational objective time period is formulated in scheduling
Obj, reach the minimum pressure regulation ability Δ V that wind energy turbine set should have
Min, maximum pressure regulation ability Δ V
MaxAt last, confirm the idle allocation model of wind-powered electricity generation machine and the control time interval delta T of the idle runnable interface of wind energy turbine set scheduling fitting-type;
(2) the idle runnable interface of wind energy turbine set scheduling fitting-type judges whether the current time be positioned at the object time section of scheduling formulation, if not, other parameter settings of then not accepting to dispatch; If the current time is positioned at the object time section that scheduling is formulated, other that then accept to dispatch are provided with parameter, and with its parameter that is provided with as the idle runnable interface of wind energy turbine set scheduling fitting-type; Said other are provided with parameter and comprise: the voltage influence factor K of wind energy turbine set reactive power, the object run voltage V of wind energy turbine set
Obj, the minimum pressure regulation ability of wind energy turbine set Δ V
Min, the maximum pressure regulation ability of wind energy turbine set Δ V
Max, wind energy turbine set operational voltage upper limit V
Max, wind energy turbine set working voltage lower limit V
Min, the idle allocation model of wind-powered electricity generation machine of the idle runnable interface of wind energy turbine set scheduling fitting-type, the control time interval delta T of the idle runnable interface of wind energy turbine set scheduling fitting-type;
(3) the idle runnable interface of wind energy turbine set scheduling fitting-type is provided with parameter is monitored access point voltage and each blower fan of wind energy turbine set in the object time section meritorious output according to described in (2); Begin in each control time interval delta T, calculate total reactive requirement Q of wind energy turbine set according to the point voltage that is incorporated into the power networks;
(4) obtain after total reactive requirement Q of wind energy turbine set, the idle allocation model of wind-powered electricity generation machine according to being provided with is assigned to the wind-powered electricity generation machine with reactive requirement; The wind-powered electricity generation machine export on request or absorbing reactive power with regulation voltage;
(5) the idle runnable interface of wind energy turbine set scheduling fitting-type judges whether the current time be in the object time section, if then return step (3); If, then do not return step (1).
2. the idle operation method of wind energy turbine set scheduling fitting-type that is applicable to high-voltage fence according to claim 1; It is characterized in that: the idle runnable interface of described wind energy turbine set scheduling fitting-type is to instruct as parameter with the pressure regulation of power system dispatching department, converts wind farm grid-connected point voltage and the meritorious output of blower fan into interface that the wind energy turbine set reactive power is instructed.
3. the idle operation method of wind energy turbine set scheduling fitting-type that is applicable to high-voltage fence according to claim 1 is characterized in that: the minimum pressure regulation ability Δ V that said wind energy turbine set should have
MinWith maximum pressure regulation ability Δ V
MaxBe power scheduling department according to electric power netting safe running in the object time section or economical operation needs, the voltage-regulation of the wind energy turbine set of being formulated must be able to cause in theory and the minimum voltage variable quantity and the maximum voltage variable quantity of site.
4. the idle operation method of wind energy turbine set scheduling fitting-type that is applicable to high-voltage fence according to claim 1, it is characterized in that: said voltage security of operation need refer to the object run voltage V through the wind energy turbine set of adjusting
ObjMake working voltage the safest in theory, it is minimum that the out-of-limit probability of voltage takes place; Under this voltage security of operation requires, get the object run voltage V of wind energy turbine set
ObjBe in the working voltage scope [V of wind energy turbine set
Min, V
Max] mid point.
5. the idle operation method of wind energy turbine set scheduling fitting-type that is applicable to high-voltage fence according to claim 1 is characterized in that: the idle allocation model of wind-powered electricity generation machine of the idle runnable interface of said wind energy turbine set scheduling fitting-type comprises following two kinds of patterns:
Pattern one, mean allocation
Total reactive requirement is shared out equally every typhoon motor;
The simple distribution of pattern two, the meritorious constraint of consideration,
Let the less wind-powered electricity generation machine of meritorious output bear more voltage-regulation task, the more wind-powered electricity generation machine of meritorious output is born less voltage-regulation task, reaches the purpose of reasonable distribution reactive requirement.
6. the idle operation method of wind energy turbine set scheduling fitting-type that is applicable to high-voltage fence according to claim 5 is characterized in that: in the said pattern two:
Wind-powered electricity generation machine meritorious and idle linear, and when total reactive requirement be correct time, when meritorious zero of wind-powered electricity generation machine was sent out, the wind-powered electricity generation machine sent and specified active power P
NSuitable idle of numerical value; When gaining merit of wind-powered electricity generation machine completely sent out, the wind-powered electricity generation machine sent Q
0Idle; When total reactive requirement when negative, when meritorious zero of wind-powered electricity generation machine was sent out, the wind-powered electricity generation machine absorbed and 1.25 times of specified active power P
NSuitable idle of numerical value; When gaining merit of wind-powered electricity generation machine completely sent out, the wind-powered electricity generation machine absorbed Q
1Idle, have
Wherein, P
iBe the meritorious output of i typhoon machine, N is the blower fan number;
Then idle being output as of i typhoon machine
7. the idle operation method of wind energy turbine set scheduling fitting-type that is applicable to high-voltage fence according to claim 6 is characterized in that in the said pattern two that precision is very poor when the total meritorious output of wind energy turbine set is very little, should switch to pattern one; Simultaneously, when reactive requirement during, also should switch to pattern one greater than NPN.
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