CN107612032A - A kind of wind-electricity integration power quality supervisory information system and method based on two-state control - Google Patents
A kind of wind-electricity integration power quality supervisory information system and method based on two-state control Download PDFInfo
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Abstract
The invention discloses a kind of wind-electricity integration power quality supervisory information system and method based on two-state control, wherein, monitoring system includes：Wind-powered electricity generation data acquisition module, major network data acquisition module, grid-connected interface module, controller and stable compensation access terminal；Wind-powered electricity generation data acquisition module is used for the power information for gathering wind power generating set；Major network data acquisition module is used for the power quality parameter for gathering power network major network；Grid-connected interface module is used for the characteristic parameter for gathering the grid-connected place of wind power generating set and power network major network；Controller is used to generate power compensation information according to the power information of wind power generating set, and for the power quality parameter according to power network major network, characteristic parameter generation damping stable state compensated information；Stable compensation access terminal carries out stable state compensation control to grid-connected place according to power compensation information and damping stable state compensated information.The present invention realizes the bistable state compensation to the wind-electricity integration quality of power supply through the above way, and it is horizontal to improve the power network quality of power supply.
Description
Technical field
The invention belongs to wind power-generating grid-connected system, and in particular to a kind of wind-electricity integration electric energy matter based on two-state control
Measure monitoring system and method.
Background technology
In recent years, China's wind-powered electricity generation is fast-developing, and grid-connected scale is presented is doubled formula growth year by year, and certain effect is brought to society
Benefit, but because power system auxiliary facility imperfection, Wind turbines are unsatisfactory for the factors such as Grid-connection standards in itself, make Wind turbines pole
Group off-grid easily occurs, the power shortage thereby resulted in carrys out extreme shock to network system frequency band.As wind-electricity integration is advised
The expansion of mould, this impact are more and more obvious；For the wind power plant sent out at a distance, when wind power output is higher, a large amount of wind-powered electricity generations
The remote of power is sent outside and line drop can be caused to increase, and the voltage stability margin of sending can reduce；When wind power output compared with
Hour, the charge power of circuit can cause line end voltage higher, and voltage control is difficult.
To improve power network quality of power supply level, influence of the wind-electricity integration to the power network quality of power supply is reduced, has carried out power network
Electric energy quality monitoring, realize the basic function of data acquisition and related power quality compensation.But utilize simultaneously network electric energy quality
The research of extraction, analysis and identification and to operation of power networks horizontal comprehensive assessment etc. of the Monitoring Data to disturbance information is also
It is not deep enough, and mainly for the power quality problem of grid-connected power network, without considering wind power generating set power pair simultaneously
The influence of net.
The content of the invention
It is an object of the invention to provide a kind of wind-electricity integration computer Quality Monitoring Control System and method based on two-state control,
While except monitoring grid-connected electric energy quality monitoring, wind power generator group function is also considered to grid-connected influence, so as to phase
Control is adjusted with answering improves power network quality of power supply level.
On the one hand, the present invention provides a kind of wind-electricity integration power quality supervisory information system based on two-state control, including：Wind
Electric data collecting module, major network data acquisition module, grid-connected interface module, controller and stable compensation access terminal；
Wherein, wind-powered electricity generation data acquisition module, major network data acquisition module, grid-connected interface module and stable compensation access terminal
It is connected with the controller, the stable compensation access terminal is also connected with the grid-connected interface module；
The wind-powered electricity generation data acquisition module is used for the power information for gathering wind power generating set, and sends the control to
Device；
The major network data acquisition module is used for the power quality parameter for gathering power network major network, and sends the control to
Device；
The grid-connected interface module is used for the feature for gathering the grid-connected place of the wind power generating set and the power network major network
Parameter, and send the controller to；
Wherein, the characteristic parameter includes device parameter and ambient parameter；
The controller is used to generate power compensation information according to the power information of wind power generating set, and for basis
Power quality parameter, the characteristic parameter generation damping stable state compensated information of power network major network, and be used for the power compensation information
The stable compensation access terminal is sent to the damping stable state compensated information；
The stable compensation access terminal is according to the power compensation information and the damping stable state compensated information to grid-connected
Place carries out stable state compensation control.
Wherein, the power information of wind power generating set obtains in the following way：Wind-powered electricity generation data collecting module collected wind-force
The magnitude of voltage and current value of the middle measured point of generating set, and calculate corresponding power.
Preferably, the controller is provided with wind-powered electricity generation analytic unit, and the stable compensation access terminal is provided with synchronous mend
Repay device；
Wherein, the wind-powered electricity generation analytic unit is used to calculate wind-power electricity generation according to the power information of the wind power generating set
The power decrement of unit, and judge whether the power decrement exceedes threshold value, if exceeding threshold value, generation power back-off letter
Breath；
The synchronous compensator carries out power back-off according to the power compensation information to grid-connected place.
The wind-powered electricity generation analytic unit subtracts for the power information to be obtained into power compared with the power information to prestore
On a small quantity, it is preferable to carry out how much difference power mends how many modes, such as power decrement is quantity of power to be compensated.
Preferably, the controller is provided with major network analytic unit, and it is steady that the stable compensation access terminal is provided with system
Determine device；
The major network analytic unit is used to judge grid-connected match somebody with somebody according to the power quality parameter and characteristic parameter analysis
Whether electricity is abnormal, if abnormal, carries out abnormal positioning, and for steady according to the generation damping of the power quality parameter of the power network major network
State compensated information；
The system stabilizer carries out transient stability compensation according to the damping stable state compensated information to grid-connected place.
Wherein, controller also includes evaluation unit, and evaluation unit judges that grid-connected distribution is no different for major network analytic unit
When normal or wind power generating set power decrement is not less than threshold value, the wind-electricity integration quality of power supply is evaluated, it was evaluated
Journey includes step 31- steps 36.
Preferably, the system stabilizer has measurement filter circuit, phase compensating circuit, gain adjusting circuit, isolation letter
Block isolating circuit and the amplitude limiter circuit composition of number stationary value, wherein using motor speed deviation, to export, grid-connected place's major network voltage is
Output.
Wherein, the motor in motor speed deviation is the motor of wind power generating set.It is preferred that synchronous compensator is become by coupling
The direct current of energy storage device is converted into one group of three-phase alternating current output voltage by depressor and voltage source inverter composition, synchronous compensator,
By the amplitude and phase of the voltage for adjusting bridge rectifier AC, the reactive current for meeting to require is sent, is realized grid-connected
Power back-off.
On the other hand, the present invention also provides a kind of wind-electricity integration electric energy quality monitoring method based on two-state control, its
It is characterised by：Comprise the following steps：
Step 1：Gather power information, the power quality parameter and wind-driven generator of power network major network of wind power generating set
The characteristic parameter at the grid-connected place of group and power network major network；
Wherein, characteristic parameter includes device parameter and ambient parameter；
Step 2：Power compensation information is generated according to the power information of wind power generating set in step 1, and according to step 1
Power quality parameter, the characteristic parameter generation damping stable state compensated information of middle power network major network；
Step 3：According to the power compensation information and the damping stable state compensated information to wind power generating set and power network
The grid-connected place of major network carries out stable state compensation control.
Preferably, the process that stable compensated information is generated in step 2 is as follows：
The power information of the wind power generating set gathered according to step 1 calculates the power decrement of wind power generating set,
And judge whether the power decrement exceedes threshold value, if exceeding threshold value, generate power compensation information；It is right not above threshold value
The wind-electricity integration quality of power supply is evaluated；
The power quality parameter of the power network major network gathered according to step 1 and wind power generating set and power network major network it is grid-connected
The characteristic parameter at place judges whether grid-connected distribution is abnormal, if abnormal, carries out abnormal positioning, and according to the electric energy of the power network major network
Mass parameter generation damping stable state compensated information；If not abnormal, the wind-electricity integration quality of power supply is evaluated.
Wherein, the power information is obtained into power decrement compared with the power information to prestore, and described in judgement
Whether power decrement is more than threshold value, if being more than threshold value, generates power compensation information.Threshold value is the spy being empirically derived out
Fixed number value.
Preferably, power quality parameter and the characteristic parameter analysis gathered according to step 1 judges whether grid-connected distribution is abnormal,
If abnormal, the process positioned extremely comprises the following steps：
Step 21：The early warning knowledge base and performance prediction model of electric energy quality monitoring are called, in the early warning knowledge base
Including warning index and its standard value, abnormity diagnosis rule, the abnormity diagnosis rule is got over line situation including warning index and corresponded to
Abnormal cause event；
Step 22：Power quality parameter, ambient parameter, device parameter are compared with the standard value of setting respectively, such as
Any value that is above standard of fruit then sends warning；
Step 23：The predicted value of power quality index, and bonding apparatus parameter and environment are calculated according to performance prediction model
Parameter carries out trend analysis to grid-connected Monitoring Data and obtains grid-connected trend analysis result；
Step 24：From early warning knowledge base select warning index, by and trend analysis result carry out warning index meter
Calculate, and the calculated value of warning index is obtained to the out-of-limit feelings of each warning index compared with the standard value in early warning knowledge base
Condition；
Step 25：According to warning index result of calculation and out-of-limit situation, match abnormity diagnosis rule in early warning knowledge base and know
Other abnormal cause event completes abnormal positioning.
Preferably, if judging that grid-connected distribution is without exception or the power decrement of wind power generating set is not less than threshold value,
The wind-electricity integration quality of power supply is evaluated；
Wherein, it is as follows to the process of wind-electricity integration quality of power supply evaluation：
Step 31：Power quality parameter, device parameter and the ambient parameter gathered to step 1 verifies, and obtains
The once power parameter of the wind power generating set after grid-connected place's power back-off；
Step 32：Establishing includes the stereoscopic level structure of the hierarchical relationship between every evaluation index, the evaluation index
The directly or indirectly power parameter of the wind power generating set after power quality parameter, compensation, ambient parameter and equipment ginseng
Number；
Step 33：Calculating scoring individually is carried out to every evaluation index；
Step 34：Two are carried out to the desired value of the evaluation index of same level in stereoscopic level result according to triple assessment method
Two compare, and comparator matrix C is established according to comparative result, calculate in comparator matrix C importance between element, comparator matrix is converted to
Judgment matrix；
Step 35：Obtain the relative weighting of evaluation index in each level, and carry out consistency desired result, if verification not by,
Then redirect and perform step 34, if verification passes through, redirect and perform step 36；
Step 36：Weight coefficient is corrected, and grid-connected electric energy is calculated according to the scoring of every evaluation index and weight coefficient
Comprehensive effectiveness.
Wherein, the power parameter of the wind power generating set after power quality parameter and compensation is primary element, ambient parameter
It is minor element with device parameter, power quality parameter includes frequency quality, tri-phase unbalance factor, harmonic content, voltage pulsation
Amplitude.
Preferably, step 35 comprises the following steps：
Step 41：The eigenvalue of maximum λ max of judgment matrix described in obtaining step 34；
Step 42：Obtain characteristic vector W corresponding to the eigenvalue of maximum λ max；
Wherein, it is the quantity of evaluation index that the characteristic vector W, which includes n weight vectors Wi, n,；
Step 43：The characteristic vector W according to step 42 obtains each evaluation index on the relative of upper level index
Weight；
Step 44：Consistency check is carried out to characteristic vector W using specific formulation, if verification is not by redirecting execution
Step 34, if verification passes through, redirect and perform step 36；
Wherein, the specific formulation for consistency check is as follows：
DI=(λ max-b)/(b-1)
Wherein, DI is compatibility index, and b is the quantity of weight phasor；As DI ＜ 0.2, receive the consistent of judgment matrix
Property；As DI >=0.2, judgment matrix should be made an amendment again, then that weight is recalculated to the matrix after correction is consistent with progress
Property examine and received until uniformity.
Preferably, the comparator matrix in step 34 is as follows：
Wherein, the rule of triple assessment method is：
Wherein, cijFor the desired value a of i-th of evaluation index in certain layer of indexiWith the desired value a of j-th of evaluation indexj's
Comparative result, aiFor the desired value of i-th of evaluation index in certain layer of index, ajFor the index of j-th of evaluation index in certain layer of index
Value, aiAnd ajFor same layer Index element, n is the dimension of comparator matrix.
Wherein, C={ (cij)}。
Beneficial effect
Compared with existing Forecasting Methodology, present invention tool has the advantage that：The present invention gets the power of wind power generating set
The characteristic parameter at the grid-connected place of information, the power quality parameter of power network major network and wind power generating set and power network major network and judgement
Go out it is grid-connected match somebody with somebody electrical anomaly after, generate damping stable state compensated information and power compensation information compensate, the present invention can interpolate that
Go out whether grid-connected distribution abnormal, and considered simultaneously power network major network the quality of power supply and wind power generating set power pair simultaneously
The influence of net and correspondingly carry out bistable state compensation, improve the power network quality of power supply level, in addition, the present invention can analyze judgement
Whether abnormal go out grid-connected distribution, and carry out abnormal positioning and evaluation, obtain the comprehensive effectiveness of grid-connected power network, get in time simultaneously
The situation of net power network.
Brief description of the drawings
Fig. 1 is a kind of wind-electricity integration power quality supervisory information system based on two-state control provided in an embodiment of the present invention
Block diagram；
Fig. 2 is a kind of wind-electricity integration electric energy quality monitoring method based on two-state control provided in an embodiment of the present invention
One flow chart；
Fig. 3 is a kind of wind-electricity integration electric energy quality monitoring method based on two-state control provided in an embodiment of the present invention
Another flow chart；
Fig. 4 is the flow chart provided in an embodiment of the present invention for judging whether grid-connected distribution is abnormal；
Fig. 5 is the flow chart provided in an embodiment of the present invention evaluated the wind-electricity integration quality of power supply.
Embodiment
Below in conjunction with embodiment, the present invention is described further.
As shown in figure 1, the wind-electricity integration computer Quality Monitoring Control System based on two-state control of the present embodiment includes wind-powered electricity generation
Data acquisition module, major network data acquisition module, grid-connected interface module, controller and stable compensation access terminal, wherein, wind-powered electricity generation
Data acquisition module, major network data acquisition module, grid-connected interface module and stable compensation access terminal are connected with controller, surely
Surely compensation access terminal is also connected with grid-connected interface module, and grid-connected interface module connects respectively with wind power generating set and power network major network
Connect.
Wherein, wind-powered electricity generation data acquisition module is connected with wind power generating set, and the power for gathering wind power generating set is believed
Breath, and send controller to；Major network data acquisition module is connected with wind power generating set, for gathering the electric energy matter of power network major network
Parameter is measured, and sends controller to；Grid-connected interface module is used for the spy for gathering the grid-connected place of wind power generating set and power network major network
Parameter is levied, and sends controller to, characteristic parameter includes device parameter and ambient parameter.
Specifically, the gatherer process of the power information of wind power generating set is：Wind-powered electricity generation data collecting module collected wind-force is sent out
The magnitude of voltage and current value of the middle measured point of group of motors, and calculate corresponding power.The power quality parameter bag of power network major network
Include but be not restricted to frequency quality, tri-phase unbalance factor, harmonic content, voltage pulsation amplitude.Device parameter does not limit still
Numbering, model, the numbering of power network major network etc. in Wind turbines.Ambient parameter includes but is not restricted to temperature, wind speed etc..
Controller is used to generate power compensation information according to the power information of wind power generating set, and for according to power network
Power quality parameter, the characteristic parameter generation damping stable state compensated information of major network, and for power compensation information and damping is steady
State compensated information is sent to stable compensation access terminal, and the stable access terminal that compensates is mended according to power compensation information and damping stable state
Repay information and stable state compensation control is carried out to grid-connected place.
Specifically, controller includes wind-powered electricity generation analytic unit and major network analytic unit, the stable access terminal that compensates includes system
Stabilizer and synchronous compensator.
Wherein, wind-powered electricity generation analytic unit is used to calculate wind power generating set according to the power information of the wind power generating set
Power decrement, and judge whether the power decrement exceedes threshold value, if exceeding threshold value, generate power compensation information,
Synchronous compensator carries out power back-off according to power compensation information to grid-connected place.Specifically, wind-powered electricity generation analytic unit is used for power
Information obtains power decrement compared with the power information to prestore.Synchronous compensator is by coupling transformer and voltage source inverter
Device is formed, and the direct current of energy storage device is converted into one group of three-phase alternating current output voltage by synchronous compensator, by adjusting bridge rectifier
The amplitude and phase of the voltage of circuit AC side, the reactive current for meeting to require is sent, realizes grid-connected power back-off.
Major network analytic unit is used to judge whether grid-connected distribution is abnormal according to power quality parameter and characteristic parameter analysis, if
It is abnormal, abnormal positioning is carried out, and for generating damping stable state compensated information according to the power quality parameter of power network major network, system is steady
Determine device and transient stability compensation is carried out to grid-connected place according to damping stable state compensated information.System stabilizer have measurement filter circuit,
Phase compensating circuit, gain adjusting circuit, the block isolating circuit of isolation signals stationary value and amplitude limiter circuit composition, wherein using motor
Rotating speed deviation is output, and grid-connected place's major network voltage is output.
Wherein, major network analytic unit judges the whether abnormal procedure performance step 21- steps 25 of grid-connected distribution.Specifically,
Major network analytic unit includes：
Call unit：For calling the early warning knowledge base and performance prediction model of electric energy quality monitoring, the early warning is known
Knowing storehouse includes warning index and its standard value, abnormity diagnosis rule, and the abnormity diagnosis rule gets over line feelings including warning index
Abnormal cause event corresponding to condition.Wherein early warning knowledge base and performance prediction model can be building temporarily or pre-
First build.
Alarm unit：For the standard value of power quality parameter, ambient parameter, device parameter respectively with setting to be compared
It is right, send warning if any value that is above standard.
Trend analysis unit：For calculating the predicted value of power quality index, and bonding apparatus according to performance prediction model
Parameter and ambient parameter carry out trend analysis to grid-connected Monitoring Data and obtain grid-connected trend analysis result.
Early warning analysis unit：For selecting warning index from early warning knowledge base, by and trend analysis result carry out it is pre-
The calculating of alert index, and the calculated value of warning index is obtained into each early warning compared with the standard value in early warning knowledge base and referred to
The out-of-limit situation of target, and for according to warning index result of calculation and out-of-limit situation, matching abnormity diagnosis in early warning knowledge base
Rule identification abnormal cause event completes abnormal positioning.
Wherein, controller also includes evaluation unit, and evaluation unit judges that grid-connected distribution is no different for major network analytic unit
When normal or wind power generating set power decrement is not less than threshold value, the wind-electricity integration quality of power supply is evaluated, it was evaluated
Journey includes step 31- steps 36.Specifically, evaluation unit includes：
Verification unit：Power quality parameter, device parameter and ambient parameter for being gathered to step 1 verify, and
Obtain the power parameter of the wind power generating set after last grid-connected place's power back-off；
Construction unit：Include the stereoscopic level structure of the hierarchical relationship between every evaluation index, institute's commentary for establishing
Valency index directly or indirectly the power parameter of wind power generating set after power quality parameter, compensation, ambient parameter and
Device parameter；
Index scoring unit：For individually carrying out calculating scoring to every evaluation index；
Judgment matrix generation unit：For the evaluation index according to triple assessment method to same level in stereoscopic level result
Desired value compared two-by-two, comparator matrix C is established according to comparative result, calculates in comparator matrix C importance between element, will
Comparator matrix is converted to judgment matrix；
Weight calculation unit：For obtaining the relative weighting of evaluation index in each level, and carry out consistency desired result.
Comprehensive effectiveness computing unit, for correcting weight coefficient, and the scoring according to every evaluation index and weight coefficient
Calculate the comprehensive effectiveness of grid-connected electric energy.
It please see Figure 2, a kind of wind-electricity integration electric energy quality monitoring method based on two-state control of the present embodiment, including such as
Lower step：
Step 1：Gather power information, the power quality parameter and wind-driven generator of power network major network of wind power generating set
The characteristic parameter at the grid-connected place of group and power network major network；
Step 2：Power compensation information is generated according to the power information of wind power generating set in step 1, and according to step 1
Power quality parameter, the characteristic parameter generation damping stable state compensated information of middle power network major network；
Step 3：According to the power compensation information and the damping stable state compensated information to wind power generating set and power network
The grid-connected place of major network carries out stable state compensation control.
Wherein, characteristic parameter includes device parameter and ambient parameter；Stable compensated information includes damping stable state compensated information
And power compensation information.
Wherein, second of a kind of wind-electricity integration electric energy quality monitoring method based on two-state control as shown in Figure 3
Flow chart, understood with reference to figure 3, the process that stable compensated information is generated in step 2 is as follows：
The power information of the wind power generating set gathered according to step 1 calculates the power decrement of wind power generating set,
And judge whether the power decrement exceedes threshold value, if exceeding threshold value, generate power compensation information and perform alarm police
Show；If being no more than threshold value, the wind-electricity integration quality of power supply is evaluated；
The power quality parameter of the power network major network gathered according to step 1 and wind power generating set and power network major network it is grid-connected
The characteristic parameter at place judges whether grid-connected distribution is abnormal, if abnormal, carries out abnormal positioning, and according to the electric energy of the power network major network
Mass parameter generation damping stable state compensated information and execution alarm warning；If without exception, the wind-electricity integration quality of power supply is entered
Row evaluation.
Wherein, the power information is obtained into power decrement compared with the power information to prestore, and described in judgement
Whether power decrement is more than threshold value, if being more than threshold value, generates power compensation information.How much it is preferable to carry out the how many benefits of difference power
Mode, such as power decrement is quantity of power to be compensated.
As shown in figure 4, power quality parameter and the characteristic parameter analysis gathered according to step 1 judges whether grid-connected distribution is different
Often, if abnormal, the process positioned extremely comprises the following steps：
Step 21：The early warning knowledge base and performance prediction model of electric energy quality monitoring are called, in the early warning knowledge base
Including warning index and its standard value, abnormity diagnosis rule, the abnormity diagnosis rule is got over line situation including warning index and corresponded to
Abnormal cause event；
Wherein performance prediction model is the multiple linear regression parameter model of quality of power supply function.
Step 22：Power quality parameter, ambient parameter, device parameter are compared with the standard value of setting respectively, such as
Any value that is above standard of fruit then sends warning；
Step 23：The predicted value of power quality index, and bonding apparatus parameter and environment are calculated according to performance prediction model
Parameter carries out trend analysis to grid-connected Monitoring Data and obtains grid-connected trend analysis result；
Step 24：From early warning knowledge base select warning index, by and trend analysis result carry out warning index meter
Calculate, and the calculated value of warning index is obtained to the out-of-limit feelings of each warning index compared with the standard value in early warning knowledge base
Condition；
Step 25：According to warning index result of calculation and out-of-limit situation, match abnormity diagnosis rule in early warning knowledge base and know
Other abnormal cause event completes abnormal positioning.
It was found from above-mentioned steps, step 21 has considered the apparatus factor for influenceing the quality of power supply, environmental factor, and simultaneously
The power of wind power generating set is also contemplated, and when occurring abnormal, pass through the early warning knowledge base and performance prediction model of foundation
Abnormal positioning certainly can be realized, after abnormal fixation and recognition goes out abnormal cause event, sends instructions to stable compensation access eventually
End carries out transient stability compensation.Specifically include and correspondingly carried out damping stable state compensation and power benefit according to abnormal cause event
Repay, wherein having preset abnormal cause event and having damped the corresponding relation between stable state compensation.
If as shown in figure 5, judge that grid-connected distribution is without exception or the power decrement of wind power generating set is not less than threshold value,
The process then evaluated the wind-electricity integration quality of power supply includes step 31- steps 36：
Step 31：Power quality parameter, device parameter and the ambient parameter gathered to step 1 verifies, and obtains
The once power parameter of the wind power generating set after grid-connected place's power back-off；
Step 32：Establishing includes the stereoscopic level structure of the hierarchical relationship between every evaluation index, the evaluation index
The directly or indirectly power parameter of the wind power generating set after power quality parameter, compensation, ambient parameter and equipment ginseng
Number；
Wherein, the power parameter of the wind power generating set after power quality parameter and compensation is primary element, ambient parameter
It is minor element with device parameter, power quality parameter includes frequency quality, tri-phase unbalance factor, harmonic content, voltage pulsation
Amplitude.
Step 33：Calculating scoring individually is carried out to every evaluation index；
Step 34：Two are carried out to the desired value of the evaluation index of same level in stereoscopic level result according to triple assessment method
Two compare, and comparator matrix C is established according to comparative result, calculate in comparator matrix C importance between element, comparator matrix is converted to
Judgment matrix；
Step 35：Obtain the relative weighting of evaluation index in each level, and carry out consistency desired result, if verification not by,
Then redirect and perform step 34, if verification passes through, redirect and perform step 36；
Step 36：Weight coefficient is corrected, and grid-connected electric energy is calculated according to the scoring of every evaluation index and weight coefficient
Comprehensive effectiveness.
Wherein, the comparator matrix in step 34 is as follows：
Wherein, triple assessment method is specifically used for calculating the importance in comparator matrix C between element, the rule of triple assessment method
For：
Wherein, cijFor the desired value a of i-th of evaluation index in certain layer of indexiWith the desired value a of j-th of evaluation indexj's
Comparative result, aiFor the desired value of i-th of evaluation index in certain layer of index, ajFor the index of j-th of evaluation index in certain layer of index
Value, aiAnd ajFor same layer Index element, n is the dimension of comparator matrix.
Wherein, the relative weighting of evaluation index in each level is obtained in step 35, and carries out the specific mistake of consistency desired result
Journey comprises the following steps：
Step 41：The eigenvalue of maximum λ max of judgment matrix described in obtaining step 34；
Step 42：Obtain characteristic vector W corresponding to the eigenvalue of maximum λ max；
Wherein, it is the quantity of evaluation index that the characteristic vector W, which includes n weight vectors Wi, n,；
Step 43：The characteristic vector W according to step 42 obtains each evaluation index on the relative of upper level index
Weight；
Step 44：Consistency check is carried out to characteristic vector W using specific formulation, if verification is not by redirecting execution
Step 34, if verification passes through, redirect and perform step 36；
Wherein, the specific formulation for consistency check is as follows：
DI=(λ max-b)/(b-1)
Wherein, DI is compatibility index, and b is the quantity of weight phasor；As DI ＜ 0.2, receive the consistent of judgment matrix
Property；As DI >=0.2, judgment matrix should be made an amendment again, then that weight is recalculated to the matrix after correction is consistent with progress
Property examine and received until uniformity.
The present invention is sent out by gathering the power information of wind power generating set, the power quality parameter of power network major network and wind-force
The characteristic parameter at the grid-connected place of group of motors and power network major network obtains damping stable state compensated information and power compensation information compensates,
The quality of power supply and wind power generating set power for having considered power network major network correspondingly carry out bistable to grid-connected influence
State compensates.
It is emphasized that example of the present invention is illustrative, rather than it is limited, therefore the present invention is unlimited
Example described in embodiment, it is every drawn by those skilled in the art's technique according to the invention scheme other
Embodiment, present inventive concept and scope are not departed from, whether modification or replace, also belong to protection model of the invention
Enclose.
Claims (10)
- A kind of 1. wind-electricity integration power quality supervisory information system based on two-state control, it is characterised in that：Including：Wind-powered electricity generation data are adopted Collect module, major network data acquisition module, grid-connected interface module, controller and stable compensation access terminal；Wherein, wind-powered electricity generation data acquisition module, major network data acquisition module, grid-connected interface module and stable compensation access terminal with The controller connection, the stable compensation access terminal are also connected with the grid-connected interface module；The wind-powered electricity generation data acquisition module is used for the power information for gathering wind power generating set, and sends the controller to；The major network data acquisition module is used for the power quality parameter for gathering power network major network, and sends the controller to；The grid-connected interface module is used for the characteristic parameter for gathering the grid-connected place of the wind power generating set and the power network major network, And send the controller to；Wherein, the characteristic parameter includes device parameter and ambient parameter；The controller is used to generate power compensation information according to the power information of wind power generating set, and for according to power network Power quality parameter, the characteristic parameter generation damping stable state compensated information of major network, and be used for the power compensation information and institute State damping stable state compensated information and be sent to the stable compensation access terminal；The stable compensation access terminal is entered according to the power compensation information and the damping stable state compensated information to grid-connected place The compensation control of row stable state.
- 2. system according to claim 1, it is characterised in that：The controller is provided with wind-powered electricity generation analytic unit, described steady Surely compensation access terminal is provided with synchronous compensator；Wherein, the wind-powered electricity generation analytic unit is used to calculate wind power generating set according to the power information of the wind power generating set Power decrement, and judge whether the power decrement exceedes threshold value, if exceeding threshold value, generate power compensation information；The synchronous compensator carries out power back-off according to the power compensation information to grid-connected place.
- 3. system according to claim 2, it is characterised in that：The controller is provided with major network analytic unit, described steady Surely compensation access terminal is provided with system stabilizer；The major network analytic unit is used to judge that grid-connected distribution is according to the power quality parameter and characteristic parameter analysis No exception, if abnormal, abnormal positioning is carried out, and mend for generating damping stable state according to the power quality parameter of the power network major network Repay information；The system stabilizer carries out transient stability compensation according to the damping stable state compensated information to grid-connected place.
- 4. system according to claim 3, it is characterised in that：The system stabilizer has measurement filter circuit, phase to mend Circuit, gain adjusting circuit, the block isolating circuit of isolation signals stationary value and amplitude limiter circuit composition are repaid, wherein inclined using motor speed Difference is output, and grid-connected place's major network voltage is output.
- A kind of 5. wind-electricity integration electric energy quality monitoring method based on two-state control, it is characterised in that：Comprise the following steps：Step 1：Gather the power information of wind power generating set, the power quality parameter of power network major network and wind power generating set and The characteristic parameter at the grid-connected place of power network major network；Wherein, characteristic parameter includes device parameter and ambient parameter；Step 2：Power compensation information is generated according to the power information of wind power generating set in step 1, and according to electric in step 1 Power quality parameter, the characteristic parameter generation damping stable state compensated information of host's net；Step 3：According to the power compensation information and the damping stable state compensated information to wind power generating set and power network major network Grid-connected place carry out stable state compensation control.
- 6. according to the method for claim 5, it is characterised in that：The process that stable compensated information is generated in step 2 is as follows：The power information of the wind power generating set gathered according to step 1 calculates the power decrement of wind power generating set, and sentences Whether the power decrement of breaking exceedes threshold value, if exceeding threshold value, generates power compensation information；Not above threshold value, to wind-powered electricity generation And network electric energy quality is evaluated；The power quality parameter of the power network major network gathered according to step 1 and the grid-connected place of wind power generating set and power network major network Characteristic parameter judges whether grid-connected distribution is abnormal, if abnormal, carries out abnormal positioning, and according to the quality of power supply of the power network major network Parameter generation damping stable state compensated information；If not abnormal, the wind-electricity integration quality of power supply is evaluated.
- 7. according to the method for claim 6, it is characterised in that：Power quality parameter and the feature ginseng gathered according to step 1 Number analysis judges whether grid-connected distribution is abnormal, if abnormal, the process positioned extremely comprises the following steps：Step 21：The early warning knowledge base and performance prediction model of electric energy quality monitoring are called, the early warning knowledge base includes Warning index and its standard value, abnormity diagnosis rule, the abnormity diagnosis rule are got over different corresponding to line situation including warning index Normal reason event；Step 22：Power quality parameter, ambient parameter, device parameter are compared with the standard value of setting respectively, if appointed One value that is above standard then sends warning；Step 23：The predicted value of power quality index, and bonding apparatus parameter and ambient parameter are calculated according to performance prediction model Trend analysis is carried out to grid-connected Monitoring Data and obtains grid-connected trend analysis result；Step 24：From early warning knowledge base select warning index, by and trend analysis result carry out warning index calculating, and The calculated value of warning index is obtained to the out-of-limit situation of each warning index compared with the standard value in early warning knowledge base；Step 25：According to warning index result of calculation and out-of-limit situation, it is different to match abnormity diagnosis rule identification in early warning knowledge base Normal reason event completes abnormal positioning.
- 8. according to the method for claim 6, it is characterised in that：If judging, grid-connected distribution is without exception or wind power generating set Power decrement not less than threshold value, then the wind-electricity integration quality of power supply is evaluated；Wherein, it is as follows to the process of wind-electricity integration quality of power supply evaluation：Step 31：Power quality parameter, device parameter and the ambient parameter gathered to step 1 verifies, and obtains the last time The power parameter of wind power generating set after grid-connected place's power back-off；Step 32：Establishing includes the stereoscopic level structure of the hierarchical relationship between every evaluation index, and the evaluation index is direct Or power parameter, ambient parameter and the device parameter of wind power generating set of the secondary source after power quality parameter, compensation；Step 33：Calculating scoring individually is carried out to every evaluation index；Step 34：The desired value of the evaluation index of same level in stereoscopic level result is compared two-by-two according to triple assessment method Compared with establishing comparator matrix C according to comparative result, calculate in comparator matrix C importance between element, comparator matrix is converted into judgement Matrix；Step 35：The relative weighting of evaluation index in each level is obtained, and carries out consistency desired result, if verification is not by jumping Turn to perform step 34, if verification passes through, redirect and perform step 36；Step 36：Weight coefficient is corrected, and the comprehensive of grid-connected electric energy is calculated according to the scoring of every evaluation index and weight coefficient Close efficiency.
- 9. according to the method for claim 8, it is characterised in that：Step 35 comprises the following steps：Step 41：The eigenvalue of maximum λ max of judgment matrix described in obtaining step 34；Step 42：Obtain characteristic vector W corresponding to the eigenvalue of maximum λ max；Wherein, it is the quantity of evaluation index that the characteristic vector W, which includes n weight vectors Wi, n,；Step 43：The characteristic vector W according to step 42 obtains relative weighting of each evaluation index on upper level index；Step 44：Consistency check is carried out to characteristic vector W using specific formulation, if verification is not by redirecting execution step 34, if verification passes through, redirect and perform step 36；Wherein, the specific formulation for consistency check is as follows：DI=(λ max-b)/(b-1)Wherein, DI is compatibility index, and b is weight phasor quantity；As DI ＜ 0.2, receive the uniformity of judgment matrix；Work as DI When >=0.2, judgment matrix should be made an amendment again, then the matrix after correction is recalculated weight and carry out consistency check it is straight Received to uniformity.
- 10. according to the method for claim 8, it is characterised in that：Comparator matrix in step 34 is as follows：Wherein, the rule of triple assessment method is：Wherein, cijFor the desired value a of i-th of evaluation index in certain layer of indexiWith the desired value a of j-th of evaluation indexjComparison As a result, aiFor the desired value of i-th of evaluation index in certain layer of index, ajFor the desired value of j-th of evaluation index in certain layer of index, aiAnd ajFor same layer Index element, n is the dimension of comparator matrix.
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