CN109217372B - Wind power plant AVC operation rate and qualification rate calculation method based on data coding - Google Patents

Wind power plant AVC operation rate and qualification rate calculation method based on data coding Download PDF

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CN109217372B
CN109217372B CN201811287277.1A CN201811287277A CN109217372B CN 109217372 B CN109217372 B CN 109217372B CN 201811287277 A CN201811287277 A CN 201811287277A CN 109217372 B CN109217372 B CN 109217372B
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power plant
wind power
avc
voltage
wind
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CN109217372A (en
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陈大军
王瑞欣
李小江
高泽明
汤磊
赵春雷
李柱华
程伦
王鹏
翟万生
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State Grid Corp of China SGCC
State Grid Hebei Electric Power Co Ltd
Beijing King Star Hi Tech System Control Co Ltd
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State Grid Corp of China SGCC
State Grid Hebei Electric Power Co Ltd
Beijing King Star Hi Tech System Control Co Ltd
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    • H02J3/386—
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
    • H02J3/50—Controlling the sharing of the out-of-phase component
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
    • H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/76—Power conversion electric or electronic aspects

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Management, Administration, Business Operations System, And Electronic Commerce (AREA)
  • Wind Motors (AREA)
  • Control Of Eletrric Generators (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

The invention provides a wind power plant AVC operation rate and qualification rate calculation method based on data coding, and belongs to the technical field of automatic voltage control of power systems. When an AVC examination data recording period of each wind power plant arrives, calculating and storing AVC examination results of each wind power plant according to a three-digit coding mode, wherein hundred digits represent a wind power plant operation state, ten digits represent a wind power plant AVC control state, and one digit represents a wind power plant AVC control effect; when the wind power plant AVC assessment data statistical period comes, the coding is utilized to calculate the wind power plant AVC operation rate and the qualification rate. The method is simple and efficient in calculation, can conveniently master the reasons of insufficient AVC operation rate and qualification rate of the wind power plant, and improves the operation level of the AVC of the wind power plant.

Description

Wind power plant AVC operation rate and qualification rate calculation method based on data coding
Technical Field
The invention relates to a wind power plant AVC operation rate and qualification rate calculation method based on data coding, and belongs to the technical field of automatic voltage control of power systems.
Background
An Automatic Voltage Control (AVC) system is an important means for realizing safe (Voltage stability margin improvement), economic (network loss reduction) and high-quality (Voltage yield improvement) operation of a power transmission network. The AVC system is constructed on a power grid Energy Management System (EMS), can utilize real-time operation data of a power transmission network, scientifically decides an optimal reactive voltage regulation scheme from the perspective of global optimization of the power transmission network, and automatically issues the optimal reactive voltage regulation scheme to a power plant, a transformer substation and a subordinate power grid dispatching mechanism for execution. The architecture of automatic voltage control of a large power grid is described in "global voltage optimization control system design based on soft partitioning" (power system automation, 2003, volume 27, paragraph 8, pages 16-20) by grand son, zhenberging and guo celebration.
The main station part of the AVC system is realized in a power system control center based on software, and the voltage control strategies of the AVC system on a power transmission network mainly comprise a reactive power control strategy for each generator of a power plant and a reactive power equipment control strategy for a transformer substation, which are 2 types. The reactive power control strategy of each generator in the power plant adopts the following main modes at present: and after receiving the reactive adjustment quantity of the generator, the AVC substation of the power plant adjusts the reactive power sent by the generator in a stepping mode according to the current running state of each generator in the power plant until the adjustment quantity sent by the AVC main station is reached. The control strategy of the reactive equipment of the transformer substation is a switching instruction of the reactive compensation equipment, the reactive equipment mainly comprises a capacitor and a reactor, and when the capacitor is put into the reactive equipment or the reactor is cut off, the bus voltage is increased; when the capacitor is cut off or the reactor is put in, the bus voltage decreases. And the AVC master station issues an instruction for putting in or cutting off the reactive equipment, and an automatic monitoring system in the transformer substation finds the circuit breaker connected with the reactive equipment and switches on or off the circuit breaker according to the received instruction so as to complete the putting in or cutting off of the reactive equipment. The power dispatching mechanism examines the operation rate and the regulation qualification rate of the grid-connected wind power plant with the installed AVC substation, and the wind power plant needs to enhance the device maintenance work of the AVC substation. And the grid-connected wind power plant provided with the AVC substation is not subjected to the monthly investment automatic availability check of the dynamic reactive power compensation device.
AVC commissioning rate assessment:
when the AVC device of the grid-connected wind power plant operates in a closed loop with the master station AVC of the power dispatching mechanism, the power dispatching mechanism counts the AVC operation rate of each wind power plant according to the month. The AVC commissioning rate calculation formula is as follows:
AVC operation rate (AVC substation operation time/wind farm operation time) 100%
And when the AVC operation rate is calculated, deducting the exit time of the AVC device caused by the power grid. The AVC operation rate takes 98% as a qualified standard, and the wind power plant assessment electric quantity with the full-month AVC operation rate lower than 98% is calculated according to the following formula.
(98％-λPut into operation)/100*Wa
In the formula, λPut into operationThe AVC operation rate of the wind power plant is obtained;
Waand the grid electricity quantity of the wind power plant in the current month is obtained.
AVC regulation qualification rate assessment:
and the power dispatching mechanism evaluates the regulation qualification rate of the wind power plant AVC device through an AVC system according to monthly statistics. After the voltage instruction of an AVC master station of the power dispatching mechanism is issued, the AVC device of the wind power plant is adjusted in place within 2 minutes to be qualified. The AVC regulation qualification rate calculation formula is as follows:
AVC regulation qualification rate is equal to that the execution qualification point number/the issuing times of the power scheduling mechanism is multiplied by 100 percent
The AVC regulation qualification rate takes 96 percent as a qualification standard, the wind power plant assessment electric quantity with the full-month AVC regulation qualification rate lower than 96 percent is calculated according to the following formula, and the maximum value of the assessment electric quantity does not exceed 0.1 percent of the current-month grid-connected electric quantity of the wind power plant.
(96％-λRegulating)/100*Wa
In the formula, λRegulatingAdjusting the qualification rate for wind power plant AVC;
Waand the grid electricity quantity of the wind power plant in the current month is obtained.
In the traditional calculation method for the AVC operation rate and the AVC regulation qualification rate of the wind power plant, the AVC operation state of the wind power plant and the AVC regulation qualification state of the wind power plant are counted in two rows, and the two rows of data need to be respectively inquired and counted during the counting calculation, so that the calculation dimension is increased; in the traditional wind power plant AVC operation rate calculation method, only two operation states of 'yes' and 'no' of wind power plant AVC operation are calculated, and the reason why the wind power plant AVC is not operated cannot be mastered; in the traditional method for calculating the AVC regulation qualification rate of the wind power plant, only two states of 'yes' and 'no' of the wind power plant AVC regulation qualification are calculated, and the reason why the wind power plant AVC regulation is unqualified cannot be mastered, so that the control effect of the wind power plant AVC is influenced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a wind power plant AVC operation rate and qualification rate calculation method based on data coding. The method is simple and efficient in calculation, reduces occupation of calculation resources, can conveniently master the reasons of insufficient AVC operation rate and qualification rate of the wind power plant, and is beneficial to improving the AVC operation level of the wind power plant.
The invention provides a wind power plant AVC operation rate and qualification rate calculation method based on data coding, which is characterized by comprising the following steps of:
1) setting the AVC examination data statistical period of the wind power plant as TmSetting the AVC examination data recording period of the wind power plant as KcSetting the wind power plant assessment result statistical code as Uc,Uc＝U1*100+U2*10+U3Wherein U is1Representing wind farm AVC control State, U2Indicating wind farm lockout status, U3Representing the voltage control effect of the wind power plant; u shape1，U2，U3Are all positive integers;
2) when wind power plant AVC examination data recording period KcWhen arriving, randomly selecting one wind power plant, and recording the arrival time as k0Is provided with U1＝0，U2＝0，U3＝0；
3) With k0The moment is taken as a reference, and past n data acquisition moments of the wind power plant are read from an AVC system
Figure GDA0003046595040000031
Corresponding wind power plant high-voltage side bus voltage measurement value
Figure GDA0003046595040000032
Wind power plant high-voltage side bus voltage operation upper limit value
Figure GDA0003046595040000033
Wind power plant high-voltage side bus voltage operation lower limit value
Figure GDA0003046595040000034
Wherein ti represents the ith acquisition time; method for reading wind power plant high-voltage side bus voltage assessment dead zone V from AVC systemdThe wind power plant corresponds to a qualified threshold value M of the voltage control of the high-voltage busvar(ii) a Reading the operating state quantity Pr of the wind power plant and the operating state Ar of the AVC of the wind power plant from a measurement and acquisition system of a power grid dispatching center;
4) checking wind farm commissioning status U1And judging Pr: if Pr is 1, then U1Entering step 5) when the value is 1); if Pr is 0, then U1Entering step 8) when the value is 2);
5) checking wind farm AVC commissioning status U2And judging the AVC operation state Ar of the wind power plant: if Ar is 1, the wind power plant is judged to be in an AVC (automatic voltage control) operation state, U2Entering step 6) when the value is 1; if Ar is equal to 0, the wind power plant is judged to be in a locked state, U2Entering step 8) when the value is 0);
6) counting voltage control effect of wind power plant, and setting AVC control qualified counter M of wind power plantokSetting AVC control voltage higher counter M of wind power plant as 0upSetting AVC control voltage lower counter M of wind power plant as 0dwAnd (5) sequentially checking whether the high-voltage side bus voltage is qualified at the past n acquisition moments, wherein the calculation method comprises the following steps of:
6-1) if
Figure GDA0003046595040000035
And is
Figure GDA0003046595040000036
Then Mok＝Mok+1；
6-2) if
Figure GDA0003046595040000037
Then Mdw＝Mdw+1, if
Figure GDA0003046595040000038
Then Mup＝Mup+1；
7) Calculating AVC control effect U of wind power plant3: if it is
Figure GDA0003046595040000039
Then U is31 is ═ 1; otherwise, if Mdw≥MupThen U is3If M is equal to 0dw＜MupThen U is3＝2；
8) Generating wind power plant assessment result statistical code Uc＝U1*100+U2*10+U3And the name of the wind power plant and the time k0And UcStoring;
9) returning to the step 2) again, and continuing to process the next wind power plant until all the wind power plants monitored by the AVC system are processed, so as to obtain codes corresponding to all the wind power plants;
10) when the wind power plant AVC examination data statistical period is TmWhen the arrival time is recorded as t0Calculating the AVC operation rate of the wind power plant and the AVC regulation qualification rate of the wind power plant by using codes; the method comprises the following specific steps:
10-1) calculating AVC operation rate lambda of wind power plantPut into operation；
Code values in retrieval assessment period time period satisfy Uc≥110∧UcNumber of data N < 200o，NoRepresenting the total AVC time input of the wind power plant; code values in retrieval assessment period time period satisfy Uc≥100∧UcNumber of data N < 200r，NrRepresenting a total number of wind farm run times; calculate wind farm AVC commissioning rate as
Figure GDA0003046595040000041
10-2) calculating AVC regulation qualification rate lambda of wind power plantRegulating；
Code values in retrieval assessment period time period satisfy UcNumber of data of 111Co，CoRepresenting the execution qualified point number of the wind power plant; code values in retrieval assessment period time period satisfy Uc≥110∧UcNumber of data C less than or equal to 112r，CrIndicating the number of commands issued by the electric power dispatching organizationr(ii) a Calculating wind power plant AVC regulation qualification rate
Figure GDA0003046595040000042
The method has the characteristics and beneficial effects that:
according to the method, only a line of number of the assessment results needs to be queried, so that the calculation complexity of the AVC operation rate and the qualification rate of the wind power plant can be reduced, the calculation efficiency is improved, and the occupation of calculation resources is reduced.
According to the method, through different coding values, the states of whether the wind power plant operates and whether the wind power plant AVC is put into operation can be visually judged, whether the effect is higher or lower voltage after the wind power plant AVC control can be visually judged, the method is favorable for mastering the reason that the wind power plant AVC operation rate and the regulation qualification rate are insufficient, the wind power plant AVC operation level is improved, the wind power plant AVC control level is improved, and the wind power plant operation safety level is enhanced.
Detailed Description
The invention provides a wind power plant AVC operation rate and qualification rate calculation method based on data coding, and the following specific embodiments are further described in detail.
The invention provides a wind power plant AVC operation rate and qualification rate calculation method based on data coding, which comprises the following steps:
1) setting the AVC examination data statistical period of the wind power plant as TmSetting the AVC examination data recording period of the wind power plant as KcSetting the wind power plant assessment result statistical code as UcWhich is a3-bit positive integer coding Uc＝U1*100+U2*10+U3Wherein U is1Representing wind farm AVC control State, U2Indicating wind farm lockout status, U3Representing the voltage control effect of the wind power plant;
2) randomly selecting one wind power plant, and checking the data recording period K when the AVC of the wind power plant iscWhen the arrival time is recorded as k0Is provided with U1＝0，U2＝0，U3＝0；
3) With k0The moment is taken as a reference, and past n data acquisition moments of the wind power plant selected in the step 2) are read from an AVC system
Figure GDA0003046595040000043
(where ti denotes the ith acquisition time, and n is generally set to 5) corresponding wind farm high-voltage side bus voltage measurement value
Figure GDA0003046595040000051
Wind power plant high-voltage side bus voltage operation upper limit value
Figure GDA0003046595040000052
Wind power plant high-voltage side bus voltage operation lower limit value
Figure GDA0003046595040000053
Method for reading wind power plant high-voltage side bus voltage assessment dead zone V from AVC systemdThe wind power plant corresponds to a qualified threshold value M of the voltage control of the high-voltage busvar(ii) a And reading the operating state quantity Pr of the wind power plant and the operating state Ar of the AVC of the wind power plant from the measurement and acquisition system of the power grid dispatching center.
4) Checking wind farm commissioning status U1And judging Pr: if Pr is 1, then U11, and then entering step 5); if Pr is 0, then U12, then go to step 8);
5) checking wind farm AVC commissioning status U2And judging the AVC operation state Ar of the wind power plant: if Ar is 1, the wind power plant is judged to be in an AVC (automatic voltage control) operation state, and U2Entering step 6) when the value is 1; if Ar is equal to 0, then judgeThe wind field is in a locked state, U2Entering step 8) when the value is 0);
6) counting voltage control effect of wind power plant, and setting AVC control qualified counter M of wind power plantokSetting AVC control voltage higher counter M of wind power plant as 0upSetting AVC control voltage lower counter M of wind power plant as 0dwWhen the voltage of the high-voltage side bus of the wind power plant at the past n collection moments is 0, sequentially checking whether the voltage of the high-voltage side bus of the wind power plant is qualified, and for each collection moment, calculating the method as follows:
6-1) if
Figure GDA0003046595040000054
And is
Figure GDA0003046595040000055
Then Mok＝Mok+1；
6-2) if
Figure GDA0003046595040000056
Then Mdw＝Mdw+1, if
Figure GDA0003046595040000057
Then Mup＝Mup+1；
7) Calculating AVC control effect U of wind power plant3: if it is
Figure GDA0003046595040000058
Then U is31 is ═ 1; otherwise, if Mdw≥MupThen U is3If M is equal to 0dw＜MupThen U is3＝2；
8) Generating wind power plant assessment result statistical code Uc＝U1*100+U2*10+U3And the name of the wind power plant and the time k0And UcStoring;
9) and returning to the step 2) again, and continuing to process the next wind power plant until all the wind power plants monitored by the AVC system are processed, so as to obtain codes corresponding to all the wind power plants.
10) When wind power plant AVC examination data statistics periodIs TmWhen the arrival time is recorded as t0Calculating the AVC operation rate of the wind power plant and the AVC regulation qualification rate of the wind power plant by using codes; the method comprises the following specific steps:
10-1) calculating AVC operation rate lambda of wind power plantPut into operation；
Code values in retrieval assessment period time period satisfy Uc≥110∧UcNumber of data N < 200o，NoRepresenting the total AVC time input of the wind power plant; code values in retrieval assessment period time period satisfy Uc≥100∧UcNumber of data N < 200r，NrRepresenting a total number of wind farm run times; calculate wind farm AVC commissioning rate as
Figure GDA0003046595040000061
10-2) calculating AVC regulation qualification rate lambda of wind power plantRegulating；
Code values in retrieval assessment period time period satisfy UcNumber of data of 111Co，CoRepresenting the execution qualified point number of the wind power plant; code values in retrieval assessment period time period satisfy Uc≥110∧UcNumber of data C less than or equal to 112r，CrIndicating the number of commands issued by the electric power dispatching organizationr(ii) a Calculating wind power plant AVC regulation qualification rate
Figure GDA0003046595040000062
Example 1
Case 1: the wind farm is not put into operation;
1) setting the AVC examination data statistical period of the wind power plant as TmSetting the AVC assessment data recording period of the wind power plant as K within 86400 secondscSetting the wind power plant assessment result statistical code as U within 300 secondscWhich is a 3-bit positive integer code Uc＝U1*100+U2*10+U3Wherein U is1Representing wind farm AVC control State, U2Indicating wind farm lockout status, U3Representing the voltage control effect of the wind power plant;
2) arbitrarily select oneThe wind power plant records the arrival time as k when the wind power plant examination period arrives0In this embodiment, k is set015: 01: 00, set up U1＝0，U2＝0，U3＝0；
3) With k0The time is taken as a reference, and past 5 data acquisition times T are read from the AVC systemhis1, {01:13:00,01:13:30,01:14:00,01:14:30,01: 15: 00 measured value of high-voltage side bus voltage of wind power plant
Figure GDA0003046595040000063
Wind power plant high-voltage side bus voltage operation upper limit value
Figure GDA0003046595040000064
Lower limit value of operation of high-voltage side bus voltage of power plant
Figure GDA0003046595040000065
Method for reading wind power plant high-voltage side bus voltage assessment dead zone V from AVC systemdWhen the voltage of the high-voltage bus is controlled to be qualified, the wind power plant corresponds to a threshold value M of 0.5var0.5; and reading the operating state quantity Pr of the wind power plant to be 0 and the operating state Ar of the wind power plant AVC to be 0 from the measurement and acquisition system of the power grid dispatching center.
4) Checking wind farm commissioning status U1Judging Pr which is 0 and U1Entering step 8) when the value is 2);
8) generating wind power plant assessment result statistical code Uc＝U1*100+U2*10+U32 + 100+ 10+0 200, and name of wind farm, time k0And UcStoring;
9) and returning to the step 2), continuously processing the next wind power plant until all the wind power plants monitored by the AVC system are processed, and obtaining codes corresponding to all the wind power plants.
Case 2: the wind power plant is not put into AVC control;
1) setting the AVC examination data statistical period of the wind power plant as TmSetting the AVC assessment data recording period of the wind power plant as K within 86400 secondscSetting wind power plant assessment result statistics in 300 secondsCoded as UcWhich is a 3-bit positive integer code Uc＝U1*100+U2*10+U3Wherein U is1Representing wind farm AVC control State, U2Indicating wind farm lockout status, U3Representing the voltage control effect of the wind power plant;
2) randomly selecting one wind power plant, and recording arrival time as k when the wind power plant examination period arrives0In this embodiment, k is set003: 45:00, set up U1＝0，U2＝0，U3＝0；
3) With k0The time is used as a reference, and the AVC system reads the past 5 data acquisition times T from the AVC systemhisNo. {03:43:00,03:43:30,03:44:00,03:44:30,03: 45:00 measured value of high-voltage side bus voltage of wind power plant
Figure GDA0003046595040000071
Wind power plant high-voltage side bus voltage operation upper limit value
Figure GDA0003046595040000072
Wind power plant high-voltage side bus voltage operation lower limit value
Figure GDA0003046595040000073
Method for reading wind power plant high-voltage side bus voltage assessment dead zone V from AVC systemdWhen the voltage of the high-voltage bus of the wind power plant is controlled to be qualified, the threshold value M is 0.5var0.5; and reading the operating state quantity Pr of the wind power plant to be 1 and the operating state Ar of the wind power plant AVC to be 0 from the measurement and acquisition system of the power grid dispatching center.
4) Checking wind farm commissioning status U1Judging Pr which is 1 and U1Entering step 5) when the value is 1);
5) checking wind farm AVC commissioning status U2And determining Ar for AVC operation state of the wind power plant, determining that the wind power plant is in a locked state if Ar is 0, and determining that U is in a locked state2Entering step 8) when the value is 0);
8) generating wind power plant assessment result statistical code Uc＝U1*100+U2*10+U3100, and name the wind farmScale and time k0And UcStoring;
9) and returning to the step 2), continuously processing the next wind power plant until all the wind power plants monitored by the AVC system are processed, and obtaining codes corresponding to all the wind power plants. .
Case 3: the wind power plant is qualified in examination;
1) setting the statistical period of AVC examination data of the power plant as Tm86400 seconds, and setting the AVC assessment data recording period of the power plant as KcSetting the wind power plant assessment result statistical code as U within 300 secondscWhich is a 3-bit positive integer code Uc＝U1*100+U2*10+U3Wherein U is1Representing wind farm AVC control State, U2Indicating wind farm lockout status, U3Representing the voltage control effect of the wind power plant;
2) randomly selecting one wind power plant, and recording arrival time as k when the wind power plant examination period arrives0In this embodiment, k is set0When the ratio is 01:45:00, set up U1＝0，U2＝0，U3＝0；
3) With k0The time is taken as a reference, and past 5 data acquisition times T are read from the AVC systemhisThe wind power plant corresponds to high-side bus voltage data, and the high-side bus voltage data comprises wind power plant high-side bus voltage measuring values
Figure GDA0003046595040000074
Wind power plant high-voltage side bus voltage operation upper limit value
Figure GDA0003046595040000075
Wind power plant high-voltage side bus voltage operation lower limit value
Figure GDA0003046595040000076
Method for reading wind power plant high-voltage side bus voltage assessment dead zone V from AVC systemd0.5, the qualified threshold value M of the high-voltage bus voltage control of the wind power plantvar0.5; the method comprises the steps of reading the operating state quantity Pr of the wind power plant from a measurement and acquisition system of a power grid dispatching center to be 1AVC commissioning state Ar is 1.
4) Checking wind farm commissioning status U1Judging Pr which is 1 and U1Entering step 5) when the value is 1);
5) checking wind farm AVC commissioning status U2Judging the AVC operation state Ar of the wind power plant, judging the wind power plant to be in an AVC normal operation state if Ar is 1, and judging the wind power plant to be in a U normal operation state2Entering step 6) when the value is 1;
6) calculating and counting wind power plant voltage control effect, and setting wind power plant AVC control qualified counter MokSetting AVC control voltage higher counter M of wind power plant as 0upSetting AVC control voltage lower counter M of wind power plant as 0dwAnd (5) sequentially checking the high-voltage side bus data of the wind power plant at the past 5 acquisition moments as shown in table 1, and judging whether the control is qualified or not:
table 1 the embodiment of the present invention sequentially checks the data table of the high-voltage side bus of the wind farm at the past 5 collection times
Figure GDA0003046595040000081
7) Calculating AVC control effect U of wind power plant3，
Figure GDA0003046595040000082
Satisfies the conditions
Figure GDA0003046595040000083
Then U is3＝1；
8) Generating wind power plant assessment result statistical code Uc＝U1*100+U2*10+U31 + 100+ 10+1 111, and name of wind farm, time k0And UcStoring; (ii) a
9) And returning to the step 2), continuously processing the next wind power plant until all the wind power plants monitored by the AVC system are processed, and obtaining codes corresponding to all the wind power plants.
Case 4: the wind power plant is unqualified in examination;
1) setting the statistical period of AVC examination data of the power plant as Tm86400 seconds, and setting the AVC assessment data recording period of the power plant as KcSetting the wind power plant assessment result statistical code as U within 300 secondscWhich is a 3-bit positive integer code Uc＝U1*100+U2*10+U3Wherein U is1Representing wind farm AVC control State, U2Indicating wind farm lockout status, U3Representing the voltage control effect of the wind power plant;
2) randomly selecting one wind power plant, and recording arrival time as k when the wind power plant examination period arrives0In this embodiment, k is set002:45:00, set up U1＝0，U2＝0，U3＝0；
3) With k0The time is used as a reference, and the past 5 data acquisition times T are read from the AVC system by the AVC systemhisThe method comprises the steps that high-voltage side bus voltage data corresponding to a wind power plant are obtained, wherein the high-voltage side bus voltage data comprise wind power plant high-voltage side bus voltage measuring values
Figure GDA0003046595040000091
Wind power plant high-voltage side bus voltage operation upper limit value
Figure GDA0003046595040000092
Method for reading wind power plant high-voltage side bus voltage assessment dead zone V from AVC systemd0.5, the qualified threshold value M of the high-voltage bus voltage control of the wind power plantvar0.5; and reading the operating state quantity Pr of the wind power plant to be 1 and the operating state Ar of the wind power plant AVC to be 1 from the measurement and acquisition system of the power grid dispatching center.
4) Checking wind farm commissioning status U1Judging Pr which is 1 and U1Entering step 5) when the value is 1);
5) checking wind farm AVC commissioning status U2Judging the AVC operation state Ar of the wind power plant, judging the wind power plant to be in an AVC normal operation state if Ar is 1, and judging the wind power plant to be in a U normal operation state2Entering step 6) when the value is 1;
6) counting voltage control effect of wind power plant, and setting AVC control qualified counter M of wind power plantokSetting AVC control voltage higher counter M of wind power plant as 0upSetting AVC control voltage lower counter M of wind power plant as 0dwAnd (5) sequentially checking the high-voltage side bus data of the wind power plant at the past 5 acquisition moments, and judging whether the control is qualified:
table 2 high-voltage side bus data table of wind farm at past 5 acquisition times in the embodiment of the present invention
Figure GDA0003046595040000093
7) Calculating AVC control effect U of wind power plant3，
Figure GDA0003046595040000094
Not satisfying the condition
Figure GDA0003046595040000095
Satisfies Mdw＜MupThen U is3＝2；
8) Generating wind power plant assessment result statistical code Uc＝U1*100+U2*10+U31 + 100+ 10+ 2-112, and name of wind farm, time k0And UcStoring;
9) and returning to the step 2), continuously processing the next wind power plant until all the wind power plants monitored by the AVC system are processed, and obtaining codes corresponding to all the wind power plants.
10) When the wind power plant AVC examination data statistical period is TmWhen the arrival time is recorded as t0Calculating the AVC operation rate of the wind power plant and the AVC regulation qualification rate of the wind power plant by using codes; the method comprises the following specific steps:
10-1) calculating AVC operation rate lambda of wind power plantPut into operation；
Code values in retrieval assessment period time period satisfy Uc≥110∧UcNumber of data N < 200o＝200，NoRepresenting the total AVC time input into the wind power plant, and retrieving the code value meeting U in the assessment period time periodc≥100∧UcNumber of data N < 200r＝280，NrRepresenting a total number of wind farm run times; calculating wind farmAVC commissioning rate of
Figure GDA0003046595040000101
Figure GDA0003046595040000102
10-2) calculating AVC regulation qualification rate lambda of wind power plantRegulating；
Code values in retrieval assessment period time period satisfy UcNumber of data of 111Co＝150，CoRepresenting the execution qualified point number of the wind power plant; code values in retrieval assessment period time period satisfy Uc≥110∧UcNumber of data C less than or equal to 112r＝190，CrRepresenting the command issuing times of the power dispatching mechanism; calculating wind power plant AVC regulation qualification rate
Figure GDA0003046595040000103

Claims (1)

1.A wind power plant AVC operation rate and qualification rate calculation method based on data coding is characterized by comprising the following steps:
1) setting the AVC examination data statistical period of the wind power plant as TmSetting the AVC examination data recording period of the wind power plant as KcSetting the wind power plant assessment result statistical code as Uc,Uc＝U1*100+U2*10+U3Wherein U is1Representing wind farm AVC control State, U2Indicating wind farm lockout status, U3Representing the voltage control effect of the wind power plant; u shape1，U2，U3Are all positive integers;
2) when wind power plant AVC examination data recording period KcWhen arriving, randomly selecting one wind power plant, and recording the arrival time as k0Is provided with U1＝0，U2＝0，U3＝0；
3) With k0The moment is taken as a reference, and past n data acquisition moments of the wind power plant are read from an AVC system
Figure FDA0003046595030000011
Corresponding wind power plant high-voltage side bus voltage measurement value
Figure FDA0003046595030000012
Wind power plant high-voltage side bus voltage operation upper limit value
Figure FDA0003046595030000013
Wind power plant high-voltage side bus voltage operation lower limit value
Figure FDA0003046595030000014
Wherein ti represents the ith acquisition time; method for reading wind power plant high-voltage side bus voltage assessment dead zone V from AVC systemdThe wind power plant corresponds to a qualified threshold value M of the voltage control of the high-voltage busvar(ii) a Reading the operating state quantity Pr of the wind power plant and the operating state Ar of the AVC of the wind power plant from a measurement and acquisition system of a power grid dispatching center;
4) checking wind farm commissioning status U1And judging Pr: if Pr is 1, then U1Entering step 5) when the value is 1); if Pr is 0, then U1Entering step 8) when the value is 2);
5) checking wind farm AVC commissioning status U2And judging the AVC operation state Ar of the wind power plant: if Ar is 1, the wind power plant is judged to be in an AVC (automatic voltage control) operation state, U2Entering step 6) when the value is 1; if Ar is equal to 0, the wind power plant is judged to be in a locked state, U2Entering step 8) when the value is 0);
6) counting voltage control effect of wind power plant, and setting AVC control qualified counter M of wind power plantokSetting AVC control voltage higher counter M of wind power plant as 0upSetting AVC control voltage lower counter M of wind power plant as 0dwAnd (5) sequentially checking whether the high-voltage side bus voltage is qualified at the past n acquisition moments, wherein the calculation method comprises the following steps of:
6-1) if
Figure FDA0003046595030000015
And is
Figure FDA0003046595030000016
Then Mok＝Mok+1；
6-2) if
Figure FDA0003046595030000017
Then Mdw＝Mdw+1, if
Figure FDA0003046595030000018
Then Mup＝Mup+1；
7) Calculating AVC control effect U of wind power plant3: if it is
Figure FDA0003046595030000019
Then U is31 is ═ 1; otherwise, if Mdw≥MupThen U is3If M is equal to 0dw＜MupThen U is3＝2；
8) Generating wind power plant assessment result statistical code Uc＝U1*100+U2*10+U3And the name of the wind power plant and the time k0And UcStoring;
9) returning to the step 2) again, and continuing to process the next wind power plant until all the wind power plants monitored by the AVC system are processed, so as to obtain codes corresponding to all the wind power plants;
10) when the wind power plant AVC examination data statistical period is TmWhen the arrival time is recorded as t0Calculating the AVC operation rate of the wind power plant and the AVC regulation qualification rate of the wind power plant by using codes; the method comprises the following specific steps:
10-1) calculating AVC operation rate lambda of wind power plantPut into operation；
Code values in retrieval assessment period time period satisfy Uc≥110∧UcNumber of data N < 200o，NoRepresenting the total AVC time input of the wind power plant; code values in retrieval assessment period time period satisfy Uc≥100∧UcNumber of data N < 200r，NrRepresenting a total number of wind farm run times; calculate wind farm AVC commissioning rate as
Figure FDA0003046595030000021
10-2) calculating AVC regulation qualification rate lambda of wind power plantRegulating；
Code values in retrieval assessment period time period satisfy UcNumber of data of 111Co，CoRepresenting the execution qualified point number of the wind power plant; code values in retrieval assessment period time period satisfy Uc≥110∧UcNumber of data C less than or equal to 112r，CrIndicating the number of commands issued by the electric power dispatching organizationr(ii) a Calculating wind power plant AVC regulation qualification rate
Figure FDA0003046595030000022
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