CN109167398B - Generator set AVC (automatic Voltage control) commissioning rate and qualification rate calculation method based on data coding - Google Patents

Generator set AVC (automatic Voltage control) commissioning rate and qualification rate calculation method based on data coding Download PDF

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CN109167398B
CN109167398B CN201811287312.XA CN201811287312A CN109167398B CN 109167398 B CN109167398 B CN 109167398B CN 201811287312 A CN201811287312 A CN 201811287312A CN 109167398 B CN109167398 B CN 109167398B
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power plant
avc
generator set
period
voltage
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CN109167398A (en
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陈大军
程伦
李小江
高泽明
汤磊
赵春雷
李柱华
王瑞欣
王鹏
王生彬
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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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    • 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
    • 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
    • H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
    • H02J3/16—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by adjustment of reactive power
    • 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
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/30—Reactive power compensation

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  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

The invention provides a method for calculating the AVC operation rate and the qualified rate of a generator set based on data coding, and belongs to the technical field of automatic voltage control of an electric power system. When an AVC (automatic Voltage control) assessment data recording period of each power plant generating set arrives, calculating and storing a voltage assessment result of each generating set according to a three-digit coding mode, wherein hundred digits represent the running state of a power plant generator, ten digits represent the running state of an upper computer of the power plant, and one digit represents the control effect of the power plant generating set; when the AVC assessment data statistics period of the power plant generator set comes, the AVC operation rate and the qualified rate of the power plant generator set are calculated by using codes. The method is simple and efficient in calculation, and can be used for conveniently mastering the reasons of insufficient AVC operation rate and qualification rate of the unit and improving the operation level of the AVC of the power plant.

Description

Generator set AVC (automatic Voltage control) commissioning rate and qualification rate calculation method based on data coding
Technical Field
The invention relates to a method for calculating the AVC operation rate and the qualified rate of a generator set based on data coding, and belongs to the technical field of automatic voltage control of an electric power system.
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.
An Automatic Voltage Control (AVC) device is required to be installed in the grid-connected power plant according to scheduling operation requirements, maintenance of the AVC device of the unit is enhanced, and various performances of the AVC device meet the operation requirements of a power grid. The power dispatching mechanism examines the AVC operation rate and the regulation qualification rate of the unit of the grid-connected power plant with the installed AVC device, wherein the power plant examination principle is as follows:
1. examining the AVC operation rate of the unit;
when the AVC device of the grid-connected power plant unit and the main station AVC of the power scheduling mechanism are in closed-loop operation, the power scheduling mechanism counts the AVC operation rate of each unit according to the month. The AVC commissioning rate calculation formula is as follows:
AVC operation rate is AVC operation time/unit operation time multiplied by 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, the unit assessment electric quantity with the full-month AVC operation rate lower than 98% is calculated according to the following formula, and the maximum value of the assessment electric quantity does not exceed 0.1% of the unit current-month internet electric quantity.
(98％-λPut into operation)/100*Wa
In the formula, λPut into operationThe AVC operation rate of the unit is obtained;
Waand the unit is used for surfing the internet in the same month.
2. Checking the AVC regulation qualification rate of the unit;
and the power dispatching mechanism counts the regulation qualification rate of the AVC device of the checking unit according to the month through the AVC system. After the voltage or reactive instruction of an AVC main station of the power dispatching mechanism is issued, the AVC device of the unit is adjusted in place within 2 minutes to be qualified. The formula for calculating the AVC regulation qualification rate of the unit 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 unit 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 network electric quantity of the unit.
(96％-λRegulating)/100*Wa
In the formula, λRegulatingAdjusting the qualification rate for the AVC of the unit;
Waand the unit is used for surfing the internet in the same month.
In the traditional calculation method for the AVC commissioning rate and the AVC regulation qualification rate of the power plant generator set, the AVC commissioning state of the power plant generator set and the AVC regulation qualification state of the power plant generator set are counted in two rows, and the two rows of data need to be respectively inquired and counted during counting, so that the calculation dimensionality is increased. In the traditional calculation method for the AVC operation rate of the power plant generator set, only two operation states of 'yes' and 'no' of the AVC operation of the power plant generator set are calculated, and the reason why the AVC of the power plant generator set is not input can not be mastered; in the traditional calculation method for the AVC regulation qualification rate of the power plant generator set, only two states of 'yes' and 'no' of the AVC regulation of the power plant generator set are calculated, and the reason why the AVC regulation of the power plant generator set is unqualified cannot be mastered, so that the control effect of the AVC of the power plant is influenced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a method for calculating the AVC operation rate and the qualified rate of a generator set based on data coding. The method is simple and efficient in calculation, reduces the occupation of calculation resources, can conveniently master the reasons of insufficient AVC operation rate and qualification rate of the power plant unit, and is beneficial to improving the AVC operation level of the power plant.
The invention provides a method for calculating the AVC (automatic voltage control) commissioning rate and the qualified rate of a generator set based on data coding, which is characterized by comprising the following steps of:
1) setting the AVC examination data statistical period of the power plant generator set to be TmSetting the AVC examination data recording period of the power plant unit to be KcSetting the checking result statistical code of the power plant generator set as Uc,Uc＝U1*100+U2*10+U3Wherein U is1Indicating the operating condition of the power plant generator set, U2Represents the running state of a host computer of an AVC substation of a power plant, U3Representing the voltage control effect of the power plant generator set; u shape1，U2，U3Are all positive integers;
2) when AVC examination data recording period K of power plant generator setcWhen arriving, any power plant generator set is selected, and the arrival time is recorded as k0Is provided with U1＝0，U2＝0，U3＝0；
3) With current k0The moment is taken as a reference, and past n data acquisition moments of the power plant generator set selected in the step 2) are read from an AVC system
Figure GDA0003023383430000031
Corresponding power plant high-voltage side bus voltage measurement value
Figure GDA0003023383430000032
Upper limit of operation of high-voltage side bus voltage of power plant
Figure GDA0003023383430000033
Lower limit value of operation of high-voltage side bus voltage of power plant
Figure GDA0003023383430000034
Wherein ti represents the ith acquisition time; method for reading examination dead zone V of power plant generator set from AVC systemdAnd the qualified threshold value M of the high-voltage bus voltage control of the power plant generator setvar(ii) a Reading power plant generator set active measurement value p from power grid dispatching center measurement and acquisition system0The power plant generator set participates in AVC control state quantity gr, the power plant upper computer AVC control state quantity pr and the power plant upper computer locking state quantity pl;
4) checking power plant generator set running state U1To p for0And (4) judging: if p is0If the value is more than 0, entering a step 5); if p is0If the value is less than or equal to 0, then U is1Entering step 10) when the value is 2);
5) checking the participation of the power plant generator set in an AVC control state gr: if gr is equal to 1, then the judgment is madeThe generator set of the fixed power plant participates in AVC control, U11, then entering step 6); if gr is 0, the power plant generator set is judged not to participate in AVC control, and U1Go to step 10) then 3);
6) checking operation state U of upper computer of power plant2And judging the AVC control state quantity pr of the upper computer of the power plant: if pr is 1, judging that the upper computer of the power plant is put into operation, and U2Entering step 7) when the value is 1); if pr is 0, judging that the upper computer of the power plant quits operation, and U2Entering step 10) when the value is 0;
7) checking the locking state of the upper computer of the power plant, and judging pl: if pl is equal to 0, judging that the upper computer of the power plant is in an unlocked state, and entering the step 8); if pl is equal to 1, the upper computer is judged to be in a locking state, U2Entering step 10) when the value is 2);
8) counting the voltage control effect of the generating set of the power plant, and setting a counter M for the control qualification of the power plantokSetting the counter M for the higher control voltage of the power plant as 0upSetting the counter M for the control voltage of the power plant to be lower than 0dwAnd (5) sequentially checking whether the voltage of the high-voltage side bus of the power plant is qualified at the past n acquisition moments, wherein the calculation method comprises the following steps of:
8-1) if
Figure GDA0003023383430000035
And is
Figure GDA0003023383430000036
Then Mok＝Mok+1；
8-2) if
Figure GDA0003023383430000037
Then Mdw＝Mdw+1, if
Figure GDA0003023383430000038
Then Mup＝Mup+1；
9) Calculating the control effect U of the generating set of the power plant3: if it is
Figure GDA0003023383430000041
Then U is3If not, if M is equal to 1dw≥MupThen U is3If M is equal to 0dw＜MupThen U is3＝2；
10) Generating power plant generating set checking result statistical code Uc＝U1*100+U2*10+U3And the name of the generator set and the current time k0And UcStoring;
11) returning to the step 2) again, and continuing to process the next generator set until all the generator sets monitored by the AVC system are processed, so as to obtain codes corresponding to all the generator sets;
12) when the AVC examination data statistical period of the power plant generator set is TmWhen the arrival time is recorded as t0Calculating the commissioning rate and the qualification rate of the power plant generator set by using the codes; the method comprises the following specific steps:
12-1) calculating AVC operation rate lambda of generating set of power plantPut into operation；
Code values in retrieval assessment period time period satisfy Uc≥110∧UcNumber of data N < 200o，NoRepresenting the total amount of AVC time put into the generator set in the assessment period time, and retrieving the code value in the assessment period time to meet Uc≥100∧Uc< 200 or UcNumber of data N300r，NrThe total running time in the checking period of the generator set is shown, and the AVC operation rate of the computer set is
Figure GDA0003023383430000042
12-2) calculating AVC regulation qualification rate lambda of power plant generator setRegulating；
The code value satisfies U in the period of retrieval and examination periodcNumber of data of 111Co，CoRepresenting the execution qualification points in the evaluation period time of the generator set, and retrieving the code value in the evaluation period time to meet Uc≥110∧UcNumber of data C less than or equal to 112r，CrPower dispatching machineThe order times in the period of the structure and assessment period are calculated, and the AVC regulation qualification rate of the generator set is calculated as
Figure GDA0003023383430000043
The method has the characteristics and beneficial effects that:
according to the method, only one 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 power plant generator set can be reduced, the calculation efficiency is improved, and the occupation of calculation resources is reduced.
According to the method, through different coding values, whether the unit is not started or not subjected to AVC control and whether the upper computer of the power plant is put into operation or not can be judged visually, whether the effect is higher or lower after the AVC control of the unit is achieved can be judged visually, the method is favorable for mastering the reasons that the AVC operation rate of the power plant unit and the AVC regulation qualification rate of the unit are insufficient, the AVC operation level of the power plant unit is improved, the reactive voltage control level of a power grid is improved, and the operation safety level of the power grid is enhanced.
Detailed Description
The invention provides a method for calculating the AVC commissioning rate and the qualification rate of a generator set based on data coding.
The invention provides a method for calculating the AVC (automatic voltage control) commissioning rate and the qualified rate of a generator set based on data coding, which comprises the following steps of:
1) setting the AVC examination data statistical period of the power plant generator set to be TmSetting the AVC examination data recording period of the power plant generating set to be KcSetting the checking result statistical code of the power plant generator set as UcWhich is a 3-bit integer code Uc＝U1*100+U2*10+U3Wherein U is1Indicating the operating condition of the power plant generator set, U2Represents the running state of a host computer of an AVC substation of a power plant, U3Representing the voltage control effect of the power plant generator set; u shape1，U2，U3Are all positive integers;
2) when the power plant generating set examination data recording period KcWhen coming, choose anyA power plant generator set, and the arrival time is recorded as k0Is provided with U1＝0，U2＝0，U3＝0；
3) With current k0The moment is taken as a reference, and past n data acquisition moments of the power plant generator set selected in the step 2) are read from an AVC system
Figure GDA0003023383430000051
(where ti represents the ith acquisition time, and n is generally set to 5) corresponding measured value of the bus voltage on the high-voltage side of the power plant
Figure GDA0003023383430000052
Upper limit of operation of high-voltage side bus voltage of power plant
Figure GDA0003023383430000053
Lower limit value of operation of high-voltage side bus voltage of power plant
Figure GDA0003023383430000054
Method for reading examination dead zone V of power plant generator set from AVC systemdAnd the qualified threshold value M of the high-voltage bus voltage control of the power plant generator setvar(ii) a Reading power plant generator set active measurement value p from power grid dispatching center measurement and acquisition system0The power plant generator set participates in AVC control state quantity gr, the power plant upper computer AVC control state quantity pr and the power plant upper computer locking state quantity pl;
4) checking power plant generator set running state U1To p for0And (4) judging: if p is0If the value is more than 0, entering a step 5); if p is0If the value is less than or equal to 0, then U is1Entering step 10) when the value is 2);
5) checking the participation of the power plant generator set in an AVC control state gr: if gr is 1, the power plant generator set is judged to participate in AVC control, and U11, then entering step 6); if gr is 0, the power plant generator set is judged not to participate in AVC control, and U13, then go to step 10);
6) checking operation state U of upper computer of power plant2And judging the AVC control state quantity pr of the upper computer of the power plant: if pr is 1, judging the power plantOperation of upper computer, U2Entering step 7) when the value is 1); if pr is 0, judging that the upper computer of the power plant quits operation, and U2Entering step 10) when the value is 0;
7) checking the locking state of the upper computer of the power plant, and judging pl: if pl is equal to 0, judging that the upper computer of the power plant is in an unlocked state, and entering the step 8); if pl is equal to 1, the upper computer is judged to be in a locking state, U2Entering step 10) when the value is 2);
8) counting the voltage control effect of the generating set of the power plant, and setting a counter M for the control qualification of the power plantokSetting the counter M for the higher control voltage of the power plant as 0upSetting the counter M for the control voltage of the power plant to be lower than 0dwAnd (5) sequentially checking whether the voltage of the high-voltage side bus of the power plant is qualified at the past n acquisition moments, wherein the calculation method comprises the following steps of:
8-1) if
Figure GDA0003023383430000061
And is
Figure GDA0003023383430000062
Then Mok＝Mok+1，
8-2) if
Figure GDA0003023383430000063
Then Mdw＝Mdw+1, if
Figure GDA0003023383430000064
Then Mup＝Mup+1；
9) Calculating the control effect U of the generating set of the power plant3If, if
Figure GDA0003023383430000065
Then U is3If not, if M is equal to 1dw≥MupThen U is3If M is equal to 0dw＜MupThen U is3＝2；
10) Generating power plant generating set checking result statistical code Uc＝U1*100+U2*10+U3And is combined withThe name of the generator set and the current time k0And UcStoring;
11) and returning to the step 2) again, and continuing to process the next generator set until all the generator sets monitored by the AVC system are processed, so as to obtain codes corresponding to all the generator sets.
The period of calculating the periodic codes is generally 5 minutes, each unit is calculated and then stored, the statistical period is generally 1 day, and the sub-units are counted and then stored by utilizing the data stored by the previous calculated codes. 12) When the AVC examination data statistical period of the power plant generator set is TmWhen the arrival time is recorded as t0Calculating the commissioning rate and the qualification rate of the power plant generator set by using the codes; the method comprises the following specific steps:
12-1) calculating AVC operation rate lambda of generating set of power plantPut into operation；
Code values in retrieval assessment period time period satisfy Uc≥110∧UcNumber of data N < 200o，NoRepresenting the total amount of AVC time put into the generator set in the assessment period time, and retrieving the code value in the assessment period time to meet Uc≥100∧Uc< 200 or UcNumber of data N300r，NrThe total running time in the checking period of the generator set is shown, and the AVC operation rate of the computer set is
Figure GDA0003023383430000066
12-2) calculating AVC regulation qualification rate lambda of power plant generator setRegulating；
The code value satisfies U in the period of retrieval and examination periodcNumber of data of 111Co，CoRepresenting the execution qualification points in the evaluation period time of the generator set, and retrieving the code value in the evaluation period time to meet Uc≥110∧UcNumber of data C less than or equal to 112r，CrRepresenting the number of orders issued within the assessment period time period of the power dispatching organization, and calculating the AVC regulation qualification rate of the generator set as
Figure GDA0003023383430000067
Example 1
Case 1: the state of the power plant generator set is abnormal;
1) setting the AVC examination data statistical period of the power plant generator set to be Tm86400 seconds, and setting the AVC examination data recording period of the power plant generating set to be KcSetting the assessment result statistical code of the power plant generating set as U within 300 secondscWhich is a 3-bit integer code Uc＝U1*100+U2*10+U3Wherein U is1Indicating the operating condition of the power plant generator set, U2Represents the running state of a host computer of an AVC substation of a power plant, U3Representing the voltage control effect of the power plant generator set;
2) when the examination period of the generating set of the power plant comes, any generating set of the power plant is selected, and the coming time is recorded as k0In this embodiment, k is set015: 01: 00, set up U1＝0，U2＝0，U3＝0；
3) With current 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 corresponding measurement value of bus voltage at high voltage side of power plant
Figure GDA0003023383430000071
Upper limit of operation of high-voltage side bus voltage of power plant
Figure GDA0003023383430000072
Lower limit value of operation of high-voltage side bus voltage of power plant
Figure GDA0003023383430000073
Method for reading examination dead zone V of power plant generator set from AVC systemd0.8, the qualified threshold value M of the high-voltage bus voltage control of the power plant generator setvar0.5; reading power plant generator set active measurement value p from power grid dispatching center measurement and acquisition system0Setting the input AVC control state quantity gr of the power plant generating set to be 1, setting the AVC control state quantity pr of the power plant upper computer to be 1, and setting the power plant upper computer to be 0The latch-up state quantity pl is 0;
4) checking power plant generator set running state U1，p00 satisfies p0If the value is less than or equal to 0, then U is1Entering step 10) when the value is 2);
10) generating power plant generating set checking result statistical code U1*100+U2*10+U32 + 100+ 10+ 0-200, and name of generator set, current time k0And UcStoring;
11) and returning to the step 2), continuously processing the next generator until all the generators monitored by the AVC system are processed, and obtaining codes corresponding to all the generator sets.
Case 2: the state of the upper computer of the power plant is abnormal;
1) setting the AVC examination data statistical period of the power plant generator set to be Tm86400 seconds, and setting the AVC examination data recording period of the power plant generating set to be KcSetting the assessment result statistical code of the power plant generating set as U within 300 secondscWhich is a 3-bit integer code Uc＝U1*100+U2*10+U3Wherein U is1Indicating the operating condition of the power plant generator set, U2Represents the running state of a host computer of an AVC substation of a power plant, U3Representing the voltage control effect of the power plant generator set; (ii) a
2) When the examination period of the generating set of the power plant comes, any generating set of the power plant is selected, and the coming time is recorded as k0In this embodiment, k is set0＝03:45：00；
3) With current k0The time is taken as a reference, and past 5 data acquisition times T are read from the AVC systemhisNo. {03:43:00,03:43:30,03:44:00,03:44:30,03: 45:00 corresponding measurement value of bus voltage at high voltage side of power plant
Figure GDA0003023383430000074
Upper limit of operation of high-voltage side bus voltage of power plant
Figure GDA0003023383430000075
Lower limit value of operation of high-voltage side bus voltage of power plant
Figure GDA0003023383430000081
Method for reading examination dead zone V of power plant generator set from AVC systemd0.8, the qualified threshold value M of the high-voltage bus voltage control of the power plant generator setvar0.5; reading power plant generator set active measurement value p from power grid dispatching center measurement and acquisition system0156.34, setting the AVC control state quantity gr of the power plant generator set to be 1, setting the AVC control state quantity pr of the power plant upper computer to be 1, and setting the locking state quantity pl of the power plant upper computer to be 1;
4) checking power plant generator set running state U1，p0156.34 satisfies p0If the value is more than 0, entering the step 5);
5) checking the power plant generator set participating in AVC control state gr, judging that the power plant generator set participates in AVC control if gr is 1, and judging that the power plant generator set participates in AVC control if U is equal to 11Entering step 6) when the value is 1;
6) checking operation state U of upper computer of power plant2And judging that the power plant upper computer AVC control state quantity pr is 1, and judging that the power plant is put into operation on the premise of U2Entering step 7) when the value is 1);
7) checking the locking state pl of the upper computer in the power plant, if pl is 1, judging that the upper computer is in the locking state, and U2Entering step 10) when the value is 2);
10) generating power plant generating set checking result statistical code U1*100+U2*10+U31 × 100+2 × 10+0 × 120, and the generator set name and the current time k0And UcStoring;
11) and returning to the step 2) again, and continuing to process the next generator until all the generators monitored by the AVC system are processed, so as to obtain the codes corresponding to all the generator sets.
Case 3: the power plant generator set is qualified;
1) setting the AVC examination data statistical period of the power plant generator set to be Tm86400 seconds, and setting the AVC examination data recording period of the power plant generating set to be Kc300 seconds; setting the checking result statistical code of the generating set of the power plant as UcWhich is a 3-bit integer code Uc＝U1*100+U2*10+U3Wherein U is1Indicating the operating condition of the power plant generator set, U2Represents the running state of a host computer of an AVC substation of a power plant, U3Representing the voltage control effect of the power plant generator set;
2) when the examination period of the generating set of the power plant comes, any generating set of the power plant is selected, and the coming time is recorded as k0In this embodiment, k is set0＝01:45：00；
3) With current k0The moment is taken as a reference, the power plant generating set examination system reads the past 5 data acquisition periods T from the AVC systemhisThe power plant generating set corresponds to high-voltage side bus voltage data, including power plant high-voltage side bus voltage measured values
Figure GDA0003023383430000082
Upper limit of operation of high-voltage side bus voltage of power plant
Figure GDA0003023383430000083
Lower limit value of operation of high-voltage side bus voltage of power plant
Figure GDA0003023383430000091
Measuring and collecting power plant generator set active measurement value p from power grid dispatching center0326.18 megawatts, the AVC control state quantity gr of the power plant generator set is equal to 1, the AVC control state quantity pr of the power plant upper computer is equal to 1, and the locking state quantity pl of the power plant upper computer is equal to 0; method for reading examination dead zone V of power plant generator set from AVC systemd0.8 and qualified threshold value M of high-voltage bus voltage control of power plant generator setvar＝0.5。
4) Checking power plant generator set running state U1Wherein the power generating set active measurement value p0326.18 satisfies the condition p0If the value is more than 0, entering the step 5);
5) checking the AVC control state quantity gr of the power plant generator set, judging that the power plant generator set participates in AVC control when the condition gr is 1, and judging that U is U1Step 6 is entered as 1)
6) Checking operation state U of upper computer of power plant2And the upper computer AVC of the power plant controls the state quantity pr, if the condition pr is met, the upper computer of the power plant is judged to be put into operation, and then U is judged to be put into operation2Step 7) is entered for 1);
7) checking the locking state of the upper computer of the power plant, judging that the upper computer of the power plant is in a last locking state if the locking state quantity pl of the upper computer of the power plant meets the condition pl is 0, and entering step 8);
8) counting the control effect of the generating set of the power plant, and setting a counter M for the control qualification of the power plantokSetting the counter M for the higher control voltage of the power plant as 0upSetting the counter M for the control voltage of the power plant to be lower than 0dwSequentially checking the voltage data of the high-voltage side bus of the power plant at the last 5 collection moments as shown in the table 1, and judging whether the control is qualified or not;
table 1 high-voltage side bus voltage data table of power plant at past 5 collection times in this embodiment
Figure GDA0003023383430000092
9) Calculating the control effect U of the generating set of the power plant3，
Figure GDA0003023383430000093
Satisfies the conditions
Figure GDA0003023383430000094
Then U is3＝1；
10) Generating power plant generating set checking result statistical code U1*100+U2*10+U31 + 100+ 10+1 111, and name of generator set and current time k0And UcStoring;
11) and returning to the step 2), continuously processing the next generator until all the generators monitored by the AVC system are processed, and obtaining codes corresponding to all the generator sets.
Case 4: the power plant generator set is not qualified in examination;
1) setting the AVC examination data statistical period of the power plant generator set to be TmSetting the AVC assessment data record period of the power plant generator set in 86400 secondsPeriod of Kc300 seconds; setting the checking result statistical code of the generating set of the power plant as UcWhich is a 3-bit integer code Uc＝U1*100+U2*10+U3Wherein U is1Indicating the operating condition of the power plant generator set, U2Represents the running state of a host computer of an AVC substation of a power plant, U3Representing the voltage control effect of the power plant generator set;
2) when the examination period of the generating set of the power plant comes, any generating set of the power plant is selected, and the coming time is recorded as k0In this embodiment, k is set0＝02:45：00；
3) With current k0The moment is taken as a reference, the power plant generating set examination system reads the past 5 data acquisition periods T from the AVC systemhisThe power plant generating set corresponds to high-voltage side bus voltage data, including power plant high-voltage side bus voltage measured values
Figure GDA0003023383430000101
Upper limit of operation of high-voltage side bus voltage of power plant
Figure GDA0003023383430000102
Lower limit value of operation of high-voltage side bus voltage of power plant
Figure GDA0003023383430000103
Measuring and collecting power plant generator set active measurement value p from power grid dispatching center0326.18 megawatts, the AVC control state quantity gr of the power plant generator set is equal to 1, the AVC control state quantity pr of the power plant upper computer is equal to 1, and the locking state quantity pl of the power plant upper computer is equal to 0; method for reading examination dead zone V of power plant generator set from AVC systemd0.8 and qualified threshold value M of high-voltage bus voltage control of power plant generator setvar＝0.5。
4) Checking power plant generator set running state U1Wherein the power generating set active measurement value p0326.18 satisfies the condition p0If the value is more than 0, entering the step 5);
5) checking AVC control state quantity gr of power plant generator set as 1, and satisfying the conditionJudging whether the power plant generator set participates in AVC control or not when the condition gr is 1, and judging whether the power plant generator set participates in the AVC control or not, wherein U is the condition1Step 6) is entered as 1);
6) checking operation state U of upper computer of power plant2And the upper computer AVC of the power plant controls the state quantity pr, if the condition pr is met, the upper computer of the power plant is judged to be put into operation, and then U is judged to be put into operation2Step 7) is entered for 1);
7) checking the locking state of the upper computer of the power plant, judging that the upper computer of the power plant is in a last locking state if the locking state quantity pl of the upper computer of the power plant meets the condition pl is 0, and entering step 8);
8) counting the control effect of the generating set of the power plant, and setting a counter M for the control qualification of the power plantokWhen the voltage data of the high-voltage side bus of the power plant at the last 5 sampling moments is 0, the voltage data is sequentially checked and shown in the table 2, and whether the control is qualified is judged:
table 2 high-voltage side bus voltage data table of power plant at past 5 collection times in this embodiment
Figure GDA0003023383430000104
Figure GDA0003023383430000111
9) Calculating the control effect U of the generating set of the power plant3，
Figure GDA0003023383430000112
Not satisfying the condition
Figure GDA0003023383430000113
Satisfies Mdw＜MupThen U is3＝2；
10) Generating power plant generating set checking result statistical code U1*100+U2*10+U31 + 100+ 10+2 ═ 112, and name of generator set, current time k0And UcStoring;
11) and returning to the step 2), continuously processing the next generator until all the generators monitored by the AVC system are processed, and obtaining codes corresponding to all the generator sets.
12) When the AVC examination data statistical period of the power plant generator set is TmWhen the arrival time is recorded as t0The method for calculating the commissioning rate and the qualification rate of the power plant generator set by using the codes comprises the following steps:
12-1) calculating AVC operation rate lambda of generating set of power plantPut into operation；
Code values in retrieval assessment period time period satisfy Uc≥110∧UcNumber of data N < 200o＝200，NoRepresenting the total amount of AVC time put into the generator set in the assessment period time, and retrieving the code value in the assessment period time to meet Uc≥100∧Uc< 200 or UcNumber of data N300r＝280，NrThe total running time in the checking period of the generator set is shown, and the AVC operation rate of the computer set is
Figure GDA0003023383430000114
12-2) calculating AVC regulation qualification rate lambda of power plant generator setRegulating；
The code value satisfies U in the period of retrieval and examination periodcNumber of data of 111Co＝150，CoRepresenting the number of qualified points executed in the examination period of the generator set, and retrieving the code value satisfying U in the examination periodc≥110∧UcNumber of data C less than or equal to 112r＝190，CrRepresenting the number of orders issued within the assessment period time period of the power dispatching organization, and calculating the AVC regulation qualification rate of the generator set
Figure GDA0003023383430000121

Claims (1)

1. A method for calculating AVC commissioning rate and qualification rate of a generator set based on data coding is characterized by comprising the following steps:
1) setting the AVC examination data statistical period of the power plant generator set to be TmSetting the AVC examination data recording period of the power plant unit to be KcSetting the checking result statistical code of the power plant generator set as Uc,Uc＝U1*100+U2*10+U3Wherein U is1Indicating the operating condition of the power plant generator set, U2Represents the running state of a host computer of an AVC substation of a power plant, U3Representing the voltage control effect of the power plant generator set; u shape1，U2，U3Are all positive integers;
2) when AVC examination data recording period K of power plant generator setcWhen arriving, any power plant generator set is selected, and the arrival time is recorded as k0Is provided with U1＝0，U2＝0，U3＝0；
3) With current k0The moment is taken as a reference, and past n data acquisition moments of the power plant generator set selected in the step 2) are read from an AVC system
Figure FDA0003023383420000011
Corresponding power plant high-voltage side bus voltage measurement value
Figure FDA0003023383420000012
Upper limit of operation of high-voltage side bus voltage of power plant
Figure FDA0003023383420000013
Lower limit value of operation of high-voltage side bus voltage of power plant
Figure FDA0003023383420000014
Wherein ti represents the ith acquisition time; method for reading examination dead zone V of power plant generator set from AVC systemdAnd the qualified threshold value M of the high-voltage bus voltage control of the power plant generator setvar(ii) a Reading power plant generator set active measurement value p from power grid dispatching center measurement and acquisition system0The power plant generator set participates in AVC control state quantity gr, the power plant upper computer AVC control state quantity pr and the power plant upper computer locking state quantity pl;
4) checking power plant generator set running state U1To p for0And (4) judging: if p is0If > 0, entering the step5) (ii) a If p is0If the value is less than or equal to 0, then U is1Entering step 10) when the value is 2);
5) checking the participation of the power plant generator set in an AVC control state gr: if gr is 1, the power plant generator set is judged to participate in AVC control, and U11, then entering step 6); if gr is 0, the power plant generator set is judged not to participate in AVC control, and U1Go to step 10) then 3);
6) checking operation state U of upper computer of power plant2And judging the AVC control state quantity pr of the upper computer of the power plant: if pr is 1, judging that the upper computer of the power plant is put into operation, and U2Entering step 7) when the value is 1); if pr is 0, judging that the upper computer of the power plant quits operation, and U2Entering step 10) when the value is 0;
7) checking the locking state of the upper computer of the power plant, and judging pl: if pl is equal to 0, judging that the upper computer of the power plant is in an unlocked state, and entering the step 8); if pl is equal to 1, the upper computer is judged to be in a locking state, U2Entering step 10) when the value is 2);
8) counting the voltage control effect of the generating set of the power plant, and setting a counter M for the control qualification of the power plantokSetting the counter M for the higher control voltage of the power plant as 0upSetting the counter M for the control voltage of the power plant to be lower than 0dwAnd (5) sequentially checking whether the voltage of the high-voltage side bus of the power plant is qualified at the past n acquisition moments, wherein the calculation method comprises the following steps of:
8-1) if
Figure FDA0003023383420000021
And is
Figure FDA0003023383420000022
Then Mok＝Mok+1；
8-2) if
Figure FDA0003023383420000023
Then Mdw＝Mdw+1, if
Figure FDA0003023383420000024
Then Mup＝Mup+1；
9) Calculating the control effect U of the generating set of the power plant3: if it is
Figure FDA0003023383420000025
Then U is3If not, if M is equal to 1dw≥MupThen U is3If M is equal to 0dw＜MupThen U is3＝2；
10) Generating power plant generating set checking result statistical code Uc＝U1*100+U2*10+U3And the name of the generator set and the current time k0And UcStoring;
11) returning to the step 2) again, and continuing to process the next generator set until all the generator sets monitored by the AVC system are processed, so as to obtain codes corresponding to all the generator sets;
12) when the AVC examination data statistical period of the power plant generator set is TmWhen the arrival time is recorded as t0Calculating the commissioning rate and the qualification rate of the power plant generator set by using the codes; the method comprises the following specific steps:
12-1) calculating AVC operation rate lambda of generating set of power plantPut into operation；
Code values in retrieval assessment period time period satisfy Uc≥110∧UcNumber of data N < 200o，NoRepresenting the total amount of AVC time put into the generator set in the assessment period time, and retrieving the code value in the assessment period time to meet Uc≥100∧Uc< 200 or UcNumber of data N300r，NrThe total running time in the checking period of the generator set is shown, and the AVC operation rate of the computer set is
Figure FDA0003023383420000026
12-2) calculating AVC regulation qualification rate lambda of power plant generator setRegulating；
The code value satisfies U in the period of retrieval and examination periodcNumber of data of 111Co，CoRepresenting the execution qualification points in the evaluation period time of the generator set, and retrieving the code value in the evaluation period time to meet Uc≥110∧UcNumber of data C less than or equal to 112r，CrRepresenting the number of orders issued within the assessment period time period of the power dispatching organization, and calculating the AVC regulation qualification rate of the generator set as
Figure FDA0003023383420000027
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