CN102624034B - 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 the grid-connected wind energy turbine set of high pressure and control method of being applicable to.
Background technology
Along with going deep into of intelligent grid construction, distributed power generation replaces the 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, in one of trend of China, is grid-connected gradually to the grid-connected development of extensive voltage levels by original low capacity low-voltage-grade.Meanwhile, the addressing of distributed power generation is also gradually by inland even deep-sea regional development to coastal waters.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, the operation that the batch-type distributed power generations such as wind-powered electricity generation, solar power generation are electrical network has brought more uncertainty, and to the traffic control of electrical network, security of operation has proposed stern challenge.
Wind energy turbine set is idle operation and voltage-regulation are that one of problem of paying close attention to is most dispatched in current operation of power networks.China is the GB GB/T 19963-2011 < < wind energy turbine set access 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, configure if desired reactive-load compensation equipment to guarantee to meet the part or all of reactive requirement of wind energy turbine set self, primary substation and line attachment, keep grid-connected point voltage to meet line voltage service requirement simultaneously.In addition, GB also require double-fed that wind energy turbine set installs and direct driving speed-changing blower fan power factor should leading 0.95～lag behind dynamically adjustable between 0.95.Can find out, China's GB regulation is slightly aobvious loose, flexibility during wind energy turbine set operation is high, but the idle output that simultaneously also makes wind energy turbine set has very large uncertain and without purpose, reactive voltage operation to electrical network can not be played autotelic supporting role, has increased the difficulty of line voltage scheduling decision simultaneously.
The present invention is incorporated into the idle in service of wind energy turbine set the decision-making of voltage of power scheduling by increasing the form of interface, thereby make wind energy turbine set can coordinate voltage scheduling line voltage to be monitored in real time to and participated in initiatively pressure regulation, contribute to improve voltage fluctuation problem and scheduling decision difficulty under wind farm grid-connected, make electrical network can receive more clean wind power generation.
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 receive more wind power generation, the present invention proposes and be applicable to the idle operation of the grid-connected wind energy turbine set of high pressure and control method.The method increases interface between power scheduling and wind energy turbine set powerless control system, make the pressure regulation demand of power scheduling can be converted to the idle control command of wind energy turbine set, thereby make wind energy turbine set on purpose participate in initiatively pressure regulation, avoided the randomness of the idle operation of current wind energy turbine set and without purpose, can effectively suppress voltage fluctuation, reduce voltage scheduling decision difficulty.
The idle operation method of wind energy turbine set scheduling fitting-type that is applicable to high-voltage fence, comprises the following steps:
(1) the power scheduling parameters of wind energy turbine set scheduling fitting-type interface in the time period that sets objectives: first, power scheduling is for the Net Frame of Electric Network of current slot, by maintenance, load constant meritorious constant with wind energy turbine set, and change that wind energy turbine set is idle exerts oneself, calculate the voltage variety of wind energy turbine set access point and the ratio of wind energy turbine set output reactive power variable quantity, i.e. the voltage influence factor K of wind energy turbine set reactive power in the idle operational objective time period; Secondly, provide the working voltage scope [V of wind energy turbine set
min, V
max], again, according to voltage security of operation, needing 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, and the wind energy turbine set minimum pressure regulation ability Δ V that should have
min, maximum pressure regulation ability Δ V
max; Finally, determine the idle allocation model of wind turbine 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 current time is positioned at the object time section that scheduling is formulated, if not, do not accept other parameter settings of scheduling; If current time is positioned at the object time section that scheduling is formulated, accepts other parameters of scheduling, and using it as wind energy turbine set, dispatch the parameters of the idle runnable interface of fitting-type; Described other parameters 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 turbine 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 monitored the meritorious output of access point voltage and each blower fan of wind energy turbine set in object time section according to parameters described in (2), in each control time interval delta T, start, according to grid-connected point voltage, calculate total reactive requirement Q of wind energy turbine set;
(4) after obtaining total reactive requirement Q of wind energy turbine set, according to the idle allocation model of the wind turbine having arranged, reactive requirement is assigned to wind turbine; Wind turbine export on request or absorbing reactive power with regulation voltage;
(5) the idle runnable interface of wind energy turbine set scheduling fitting-type judges that current time whether in object time section, if so, returns to step (3); If not, return to 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 pressure regulation instruction of the described idle runnable interface Shi Yi of wind energy turbine set scheduling fitting-type power system dispatching department is as parameter, by wind farm grid-connected point voltage and the meritorious interface that is converted to the instruction of wind energy turbine set reactive power/voltage control of exporting of blower fan.Because the powerless control system of wind energy turbine set is quick, online, and the decision-making of traffic department is off-line, relatively slow, therefore, between need to be set up an interface, the decision-making of traffic department can be reflected in the control of powerless control system of wind energy turbine set and go.
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 described wind energy turbine set should have
minwith maximum pressure regulation ability Δ V
maxbe power scheduling department according to the electric power netting safe running in object time section or economical operation needs, the voltage-regulation of the wind energy turbine set of formulating must be able to cause in theory and 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, described voltage security of operation need to refer to the object run voltage V by the wind energy turbine set of adjusting
objmake working voltage the safest in theory, the probability that voltage out-of-limit occurs is minimum; Under this voltage security of operation requires, get the object run voltage V of wind energy turbine set
objworking voltage scope [V in 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 turbine of the idle runnable interface of described wind energy turbine set scheduling fitting-type comprises following two kinds of patterns:
Pattern one, mean allocation
Total reactive requirement is shared out equally to every typhoon motor;
The simple distribution of pattern two, the meritorious constraint of consideration,
In general, meritorious output is more, and the idle regulating power of wind turbine is just more weak.Therefore, can consider to allow the less wind turbine of meritorious output bear more voltage-regulation task, the more wind turbine of meritorious output is born less voltage-regulation task, thereby reaches the object of reasonable distribution reactive requirement.It is as follows that it realizes principle:
False wind motor meritorious and idle linear, and when total reactive requirement be timing (and sending idle), when meritorious zero of wind turbine is sent out, wind turbine sends and specified active-power P
nsuitable idle of numerical value; When gaining merit of wind turbine completely sent out, wind turbine sends Q
0idle; When total reactive requirement when negative (and absorbing idle), when meritorious zero of wind turbine is sent out, wind turbine absorbs and 1.25 times of specified active-power Ps
nsuitable idle of numerical value; When gaining merit of wind turbine completely sent out, wind turbine absorbs Q
1idle.Have
Wherein, P
ibe the meritorious output of i Fans, N is blower fan number.
The idle of i Fans is output as
This pattern is controlled comparatively reasonable under specific circumstances, but as wind energy turbine set total meritorious, to export when very little precision very poor, should be switched to pattern one.Meanwhile, when reactive requirement is greater than NP
ntime, also should be switched 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 decision-making of power scheduling the idle in service of wind energy turbine set first, makes wind energy turbine set participate in initiatively pressure regulation, not only can suppress voltage fluctuation, can also make voltage operate in rational level simultaneously.
(2) institute of the present invention extracting method builds on current wind energy turbine set powerless control system, makes wind energy turbine set powerless control system very valuable supplementary.Without increasing electric equipment, invest the particularly huge investment of dynamic passive compensation equipment, method is simple, can be adapted for easily software to realize automatic operation, is convenient to promote.
(3) the present invention possesses from becoming excellent characteristic, and the longer control effect of time that is applied to operation is better.
Accompanying drawing explanation
Fig. 1 is the idiographic flow schematic diagram that is applicable to the idle operation method of wind energy turbine set scheduling fitting-type of high-voltage fence.
Fig. 2 be before ocean wind energy turbine set under large mode and little mode, idle relation of exerting oneself with next stop, ocean high side voltage.
Embodiment
Below in conjunction with accompanying drawing and example, specific embodiment of the invention is described further, but enforcement of the present invention and protection are not limited to this.
The idle operation method of wind energy turbine set scheduling fitting-type that is applicable to high-voltage fence comprises:
(1) the power scheduling parameters of wind energy turbine set scheduling fitting-type interface in the time period that sets objectives: first, calculate the voltage influence factor K of wind energy turbine set reactive power; Secondly, by provided the working voltage scope [V of wind energy turbine set by GB GB/T 19963-2011 < < wind energy turbine set access power system technology regulation > >
min, V
max].Again, 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, and the wind energy turbine set minimum pressure regulation ability Δ V that should have
min, maximum pressure regulation ability Δ V
max.Finally, determine the idle allocation model of wind turbine 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.
The impact of wind energy turbine set on line voltage is mainly that the voltage of wind energy turbine set access point and near grid nodes thereof is affected.In the ordinary course of things, the increase of the reactive power that the voltage of electrical network sends with wind energy turbine set is similar to the trend that is linear growth, the increase of the reactive power absorbing with wind energy turbine set is similar to and is linear downward trend, and 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.
In 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 is
Wherein, V
2for wind energy turbine set meritorious zero, send out, reactive power is pressed rated power P
nthe voltage of when numerical values recited is sent and site, V
1for meritorious, the idle all voltage of zero while sending out and site of wind energy turbine set.
Working voltage scope [the V of wind energy turbine set
min, V
max] can be provided by operating standard or relevant national standard.At present, GB GB/T 19963-2011 < < wind energy turbine set access power system technology regulation > > has clear and definite regulation to the voltage range of operation of wind farm grid-connected point.Also site to 110kV and above 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 section
objcan adjust by following two kinds of methods.
1) if consider the steady state Safe Operation of voltage, the object run voltage V of the wind energy turbine set of can adjusting as follows
obj.
Wherein, V
minfor wind energy turbine set working voltage lower limit, V
maxfor 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 can adjusting as follows
objthe conclusion that should draw according to methods such as idle work optimization calculating is adjusted.
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 turbine internal structure, when wind turbine is in different conditions lower time, the idle output limit of wind turbine also has difference.In general, meritorious output is fewer, and the idle regulating power of wind turbine is just stronger; Meritorious output is more, and the idle regulating power of wind turbine is just more weak.In order to make wind turbine bring into play maximum pressure regulation ability, the idle output limit in the time of can considering the setting of maximum pressure regulation ability and wind energy turbine set zero to send out is corresponding, and idle output limit when the setting of minimum pressure regulation ability is 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 the rated power P of 1.5 times
nleft and right, 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 exceed this limit.
The setting of determining the control time interval delta T of the idle runnable interface of wind energy turbine set scheduling fitting-type should be considered the problem of two aspects.The one, control precision, the less control precision of control time interval delta T is higher; The 2nd, the idle control rate of blower fan, control time interval delta T should enough can be adjusted to desired quantity by idle output so that assurance wind turbine is interior at this moment greatly.
The idle allocation model of wind turbine of the idle runnable interface of wind energy turbine set scheduling fitting-type will describe in detail in the back.Under default situations, lectotype one.
(2) the idle runnable interface of wind energy turbine set scheduling fitting-type is accepted the object time section setting that scheduling arranges.Judge whether current time is the object time section that scheduling is formulated, if not, other parameter settings of scheduling do not accepted; Whether current time is the object time section that scheduling is formulated if, accepts other parameters of scheduling, and using it as wind energy turbine set, dispatches the parameters of the idle runnable interface of fitting-type.Other parameters 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 turbine 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 monitored the meritorious output of access point voltage and each blower fan of wind energy turbine set in object time section according to parameters described in (2).At each control time interval, start, according to grid-connected point voltage, calculate total reactive requirement Q of wind energy turbine set.
The principle of the idle runnable interface of wind energy turbine set scheduling fitting-type is as follows:
Total idle the exerting oneself that first the idle runnable interface of wind energy turbine set scheduling fitting-type limits wind energy turbine set regulates in a less operation area according to grid voltage change.When voltage is higher, wind energy turbine set is sent idle to support voltage; When voltage is lower, thereby wind energy turbine set absorbs the idle voltage drop that makes.
First total reactive requirement of wind energy turbine set can be determined the idle permission output area [Q that current voltage is corresponding by following formula
vMin, Q
vMax].
Wherein, total reactive requirement that Q is wind energy turbine set.Total reactive requirement Q of wind energy turbine set represents the reactive power that wind energy turbine set is sent while being positive number, represent the reactive power that wind energy turbine set absorbs during for negative.V is grid-connected point voltage.
Maximum reactive power Q
max, minimum reactive power Q
minby maximum pressure regulation ability Δ V
maxwith minimum pressure regulation ability Δ V
minthrough converting, obtain.
For the idle regulation and control reservation nargin of wind turbine, Q
maxshould not be greater than the wind energy turbine set installed capacity of 1.25 times.While 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, a little less than considering when wind energy turbine set is completely sent out that idle ability of regulation and control is, and zero ability of regulation and control while sending out is stronger.Total reactive requirement Q need determine according to the meritorious output of wind energy turbine set.
Wherein, P
wTfor wind energy turbine set installed capacity, P
ofor the meritorious output of current wind energy turbine set.
(4) after obtaining total reactive requirement Q of wind energy turbine set, according to the idle allocation model of the wind turbine having arranged, reactive requirement is assigned to wind turbine.Wind turbine export on request or absorbing reactive power with regulation voltage.
After having determined total reactive requirement Q, the idle output of every typhoon motor distributes and can be undertaken by following two kinds of patterns: pattern one, mean allocation; Pattern two, consider the simple distribution of meritorious constraint, this pattern is controlled comparatively reasonable under specific circumstances, but when wind energy turbine set total meritorious, to export when very little precision very poor, should be switched to pattern one.Meanwhile, when reactive requirement is greater than NPN, also should be switched to pattern one.
(5) the idle runnable interface of wind energy turbine set scheduling fitting-type judges that current time whether in object time section, if so, returns to step (3); If not, return to step (1).
Be below an example of calculation shows of the inventive method, take the 110kV of Zhanjiang City in 2010 and above upper strata electrical network carries out simulation calculation as example.Within 2010, Zhanjiang electrical network comprises 1 500kV transformer station, 10Zuo 220kV transformer station, 74Zuo 110kV transformer station, and a wind energy turbine set, i.e. wind energy turbine set before ocean.Its installed capacity is 49.5MW, boosts by the 110kV circuit access 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.Concrete implementation step is as follows:
1) Zhanjiang power scheduling parameters of the idle runnable interface of wind energy turbine set scheduling fitting-type in the time period that sets objectives;
2) before ocean, the idle runnable interface of wind energy turbine set scheduling fitting-type judges whether current time is positioned at the object time section that scheduling is formulated, if not, do not accept other parameter settings of scheduling; Otherwise, be accepted as parameter setting.
3) the idle runnable interface of wind energy turbine set scheduling fitting-type is according to 2) described in parameters in object time section, monitor the meritorious output of access point voltage and each blower fan of wind energy turbine set.In each time interval, according to grid-connected point voltage, calculate total reactive requirement of wind energy turbine set
4) after obtaining total reactive requirement of wind energy turbine set, according to the idle allocation model of the wind turbine having arranged, reactive requirement is assigned to wind turbine.Wind turbine export on request or absorbing reactive power with regulation voltage.
5) the idle runnable interface of wind energy turbine set scheduling fitting-type judges that current time whether in object time section, if so, returns to step 3); If not, return to step 1).
Fig. 2 has reflected that foreign front wind energy turbine set is under large mode and little mode, idle relation of exerting oneself with next stop, ocean high side voltage.Visible, 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 access power system technology regulation > > requirement, the operational voltage upper limit V of wind farm grid-connected point before ocean
maxfor 117.7kV, working voltage lower limit V
min106.7kV.In order to make grid-connected point voltage there is maximum steady operation margin of safety, get object run voltage V
objthe mean value of getting working voltage bound is 112.2kV.Meanwhile, the maximum pressure regulation ability that wind energy turbine set is set is 2kV, and minimum pressure regulation ability is 0.5kV;
Other parameters of power scheduling department are as follows:
The wind turbine 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 only 30min, the network load in the time changes little, is conducive to effective operation of the idle runnable interface of wind energy turbine set scheduling fitting-type.Control time interval delta T is set to 5s, in time period domestic demand, controls 360 times.
Subsequently, power scheduling sends to wind energy turbine set scheduling fitting-type interface by above parameters.
The parameters that wind energy turbine set scheduling fitting-type interface receiving scheduling is sent.Suppose that current time is 14:00:00, current time is positioned at object time section, and wind energy turbine set scheduling fitting-type interface is accepted to dispatch the parameters of sending and adopted new argument operation.
Next, the idle runnable interface of wind energy turbine set scheduling fitting-type detects grid-connected point voltage and wind energy turbine set is meritorious exports and calculate the reactive power that every typhoon motor should be exported, and every 10s once controls.
To suppose respectively that current network load situation is light load and two kinds of situations of heavy load below, show the control result of the idle runnable interface of wind energy turbine set scheduling fitting-type.Hypothesis simultaneously, the exerting oneself as 0MW and constant at short notice of wind energy turbine set, 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
From table 1,2, by China, Denmark's guide rule operation, the voltage of wind energy turbine set is change at random within the scope of one, and wind energy turbine set cannot guarantee self voltage, more cannot improve voltage.Under heavy load, according to Chinese guide rule, also make voltage have out-of-limit danger.
From table 1, under light load, adopt after the idle operation method operation of wind energy turbine set scheduling fitting-type, the grid-connected point voltage nearly 1kV that declines, voltage security of operation nargin improves.From table 2, under heavy load, adopt the idle operation method operation of wind energy turbine set scheduling fitting-type, the grid-connected point voltage nearly 0.5kV that rises, voltage more more approached target voltage 112.2kV, and security of operation nargin improves.
By above execution mode example, can be proved, the idle operation method of wind energy turbine set scheduling fitting-type can initiatively need to carry out pressure regulation according to scheduling, improves the security of operation nargin of grid-connected point voltage, can improve the deficiency of the idle operation of current wind energy turbine set.Meanwhile, the enforcement of the method is simple, easily realization.
Claims (7)
1. the idle operation method of wind energy turbine set scheduling fitting-type that is applicable to high-voltage fence, is characterized in that comprising the following steps:
(1) the power scheduling parameters of the idle runnable interface of wind energy turbine set scheduling fitting-type in the time period that sets objectives: first, power scheduling is for the Net Frame of Electric Network of current slot, by maintenance, load constant meritorious constant with wind energy turbine set, and change that wind energy turbine set is idle exerts oneself, calculate the voltage variety of wind energy turbine set access point and the ratio of wind energy turbine set output reactive power variable quantity, i.e. the voltage influence factor K of wind energy turbine set reactive power in the idle operational objective time period; Secondly, provide the working voltage scope [V of wind energy turbine set
min, V
max], again, according to voltage security of operation, needing 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, and the wind energy turbine set minimum pressure regulation ability Δ V that should have
min, maximum pressure regulation ability Δ V
max; Finally, determine the idle allocation model of wind turbine 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 current time is positioned at the object time section that scheduling is formulated, if not, do not accept other parameter settings of scheduling; If current time is positioned at the object time section that scheduling is formulated, accepts other parameters of scheduling, and using it as wind energy turbine set, dispatch the parameters of the idle runnable interface of fitting-type; Described other parameters 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 turbine 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 monitored the meritorious output of access point voltage and each blower fan of wind energy turbine set in object time section according to parameters described in (2), in each control time interval delta T, start, according to grid-connected point voltage, calculate total reactive requirement Q of wind energy turbine set;
(4) after obtaining total reactive requirement Q of wind energy turbine set, according to the idle allocation model of the wind turbine having arranged, reactive requirement is assigned to wind turbine; Wind turbine export on request or absorbing reactive power with regulation voltage;
(5) the idle runnable interface of wind energy turbine set scheduling fitting-type judges that current time whether in object time section, if so, returns to step (3); If not, return to step (1).
2. the wind energy turbine set that is applicable to high-voltage fence according to claim 1 is dispatched the idle operation method of fitting-type, it is characterized in that: the pressure regulation instruction of the described idle runnable interface Shi Yi of wind energy turbine set scheduling fitting-type power system dispatching department is as parameter, by wind farm grid-connected point voltage and the meritorious interface that is converted to the instruction of wind energy turbine set reactive power/voltage control of exporting of blower fan.
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 described wind energy turbine set should have
minwith maximum pressure regulation ability Δ V
maxbeing power scheduling department needs voltage-regulation minimum voltage variable quantity and the maximum voltage variable quantity that can cause in theory and site of the wind energy turbine set that formulate according to the electric power netting safe running in object time section or economical operation.
4. 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: described voltage security of operation need to refer to the object run voltage V by the wind energy turbine set of adjusting
objmake working voltage the safest in theory, the probability that voltage out-of-limit occurs is minimum; Under this voltage security of operation requires, get the object run voltage V of wind energy turbine set
objworking voltage scope [V in wind energy turbine set
min, V
max] mid point.
5. the wind energy turbine set that is applicable to high-voltage fence according to claim 1 is dispatched the idle operation method of fitting-type, it is characterized in that: the idle allocation model of wind turbine of the idle runnable interface of described wind energy turbine set scheduling fitting-type comprises following two kinds of patterns:
Pattern one, mean allocation
Total reactive requirement is shared out equally to every typhoon motor;
The simple distribution of pattern two, the meritorious constraint of consideration,
Allow the less wind turbine of meritorious output bear more voltage-regulation task, the more wind turbine of meritorious output is born less voltage-regulation task, reaches the object of reasonable distribution reactive requirement.
6. the wind energy turbine set that is applicable to high-voltage fence according to claim 5 is dispatched the idle operation method of fitting-type, it is characterized in that: in described pattern two:
Wind turbine meritorious and idle linear, and when total reactive requirement be timing, when meritorious zero of wind turbine is sent out, wind turbine sends and specified active-power P
nsuitable idle of numerical value; When gaining merit of wind turbine completely sent out, wind turbine sends Q
0idle; When total reactive requirement is when negative, when meritorious zero of wind turbine is sent out, wind turbine absorbs and 1.25 times of specified active-power Ps
nsuitable idle of numerical value; When gaining merit of wind turbine completely sent out, wind turbine absorbs Q
1idle, have
Wherein, P
ibe the meritorious output of i Fans, N is blower fan number;
The idle of i Fans is output as
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 described pattern two, and when the total meritorious output of wind energy turbine set is very little, precision is very poor, should be switched to pattern one; Meanwhile, when being greater than blower fan, reactive requirement counts N and specified active-power P
nproduct time, also should be switched to pattern one.
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| 陈宁，朱凌志，王伟.改善接入地区电压稳定性的风电场无功控制策略.《中国电机工程学报》.2009,第29卷(第10期),第102至108页. * |
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