CN107317346B - The fault-tolerance approach for avoiding power network fluctuation that governor power transducer is caused to be alarmed - Google Patents
The fault-tolerance approach for avoiding power network fluctuation that governor power transducer is caused to be alarmed Download PDFInfo
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- CN107317346B CN107317346B CN201710705872.1A CN201710705872A CN107317346B CN 107317346 B CN107317346 B CN 107317346B CN 201710705872 A CN201710705872 A CN 201710705872A CN 107317346 B CN107317346 B CN 107317346B
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- 238000007493 shaping process Methods 0.000 claims description 8
- 238000002955 isolation Methods 0.000 claims description 2
- 230000009466 transformation Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 8
- 230000005540 biological transmission Effects 0.000 description 5
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- 238000002156 mixing Methods 0.000 description 2
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Classifications
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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
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
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- Control Of Eletrric Generators (AREA)
Abstract
The present invention is the fault-tolerance approach for avoiding power network fluctuation that governor power transducer is caused to be alarmed, and solves the problems, such as that power network fluctuation leads to the error of governor report power transducer failure.Sensor false alarm caused by evading as auxiliary judgment present invention introduces mains frequency because of grid power fluctuation.Implementation method are as follows: when mains frequency and 50Hz deviation are more than a definite value A or be more than the overproof alarm of definite value A timing set time B inner shield power transducer.Definite value A and definite value B can be adjusted according to the actual situation.The governor power transducer false alarm because of caused by power network fluctuation can thus be effectively reduced.The mains frequency used in method is the mains frequency before filtering.
Description
Technical field
The present invention relates to the fault-tolerance approaches of power transducer alarm, more particularly to power network fluctuation is avoided to lead to governor power
The fault-tolerance approach of transmitter alarm.
Background technique
Former governor power transducer alarming logic are as follows: 1, it is continuous 10 times sampling lower than alarm lower bound；2, it adopts for continuous 10 times
Sample is higher than the high limit of alarm；Continuous 4 periodic samplings are overproof to be all larger than 21MW, add up it is overproof be greater than 84MW, report overproof alarm.It is easy
The place for generating false alarm is overproof alarm, and during the fluctuation of certain super high voltage direct current electricity transmission system loading, generate electricity by way of merging two or more grid systems unit
Governor power transducer will report power transducer failure, and power transducer itself is without exception.
Former control logic is as follows:
Governor controller PCC acquires that (sampling period 10ms) generating set is active, mains frequency signal in real time, and program is opened
Begin to judge, its step are as follows:
1. generating set is active between lower limit, the upper limit, governor controller PCC is tentatively judging power transducer just
Often；
2. generating set is active to be greater than the upper limit, continuous 10 samplings are in this way, governor controller PCC output power pick-up
Device alarm；Less than 10 times, governor controller PCC does not alarm；
3. generating set is active to be less than lower limit, continuous 10 samplings are in this way, governor controller PCC output power becomes
Device is sent to alarm；Less than 10 times, governor controller PCC does not alarm；
4. the active double sampling deviation of generating set is less than 21MW, governor controller PCC judgement on the basis of step 1
Power transducer is normal；
5. the active double sampling deviation of generating set is more than or equal to 21MW, continuous 4 periodic samplings on the basis of step 1
It is overproof to be all larger than 21MW, add up it is overproof be greater than 84MW, then governor controller PCC judges power transducer failure.
Some hydropower station possesses the turbine-generator units that 8 nominal outputs are 600,000 kilowatts, the diversion system in the power station
It is made of 4 about 16.5 kilometers of average length of the long diversion tunnel.The power station speed regulator system uses the conduct of Feedback of Power mode
Longtime running mode.Since operation, the power station unit is during certain super high voltage direct current electricity transmission system loading fluctuates, grid-connected hair
The governor power transducer of motor group will report power transducer failure.Power transducer is detected in governor control system
When failure, aperture mode operation can be switched to by currently running power mode.It runs smoothly to super high voltage direct current electricity transmission system
Afterwards, then operations staff's hand resetting governor alert event operates governor by centralized control center and is switched again by aperture mode
It is run to power mode.The power transducer false alarm frequently occurred is adjusted to the steady load of unit and the load wave of power grid
Dynamic control brings larger hidden danger.
According to Adaptive System of Water-Turbine Engine primary frequency modulation principle: in super high voltage direct current electricity transmission system fluctuation, unit function
Rate significantlys change, and simultaneity factor frequency significantlys change, by collecting and surveying the annual 2 years superelevation straightenings of power station 2014-2015
The fault recorder data for flowing the power station unit during transmission system fluctuates, can also confirm this point.
Summary of the invention
It is an object of the invention to provide a kind of power network fluctuations that is effectively reduced to lead to the appearance of governor report power transducer failure
Wrong method, by the logical foundations that power judges pull-in frequency can effectively reduce power transducer as assistant criteria
False alarm.
The present invention is implemented as follows:
Governor power transducer GLB uses three-phase four-wire system connection, and input signal is mutual from generator outlet voltage
Sensor PT1, generator outlet Current Transmit 1, governor power transducer GLB output signal are 4-20mA analog quantity, are connect
The analog quantity mixing module for entering governor controller PCC, as active power signal, mains frequency signal source is main transformer low-pressure side
Voltage transformer pt 2, the signal access waveform shaping plate ZX10 by the 1st isolating transformer BV10, and generator outlet voltage is mutual
Sensor PT1 accesses waveform shaping plate ZX10 through the 2nd isolating transformer BV11, the fluted disc speed measuring probe beside generator fluted disc
The input of the output welding wave trim panel ZX10 of PROX1, the output signal of waveform shaping plate ZX10 are connected to governor controller PCC
High speed counting module, as mains frequency signal.
Improved programed logic is as follows:
Governor controller PCC acquires that (sampling period 10ms) generating set is active, mains frequency signal in real time, and program is opened
Begin to judge, its step are as follows:
1. generating set is active between lower limit, the upper limit, governor controller PCC is tentatively judging power transducer just
Often；
2. generating set is active to be greater than the upper limit, continuous 10 samplings are in this way, governor controller PCC output power pick-up
Device alarm；Less than 10 times, governor controller PCC does not alarm；
3. generating set is active to be less than lower limit, continuous 10 samplings are in this way, governor controller PCC output power becomes
Device is sent to alarm；Less than 10 times, governor controller PCC does not alarm；
4. the active double sampling deviation of generating set is less than 21MW, governor controller PCC judgement on the basis of step 1
Power transducer is normal；
5. the active double sampling deviation of generating set is more than or equal to 21MW on the basis of step 1, program judgement is as follows:
5.1 continuous 4 times so, it is accumulative be more than or equal to 84MW, at this time if mains frequency is continually and steadily in (50 ± A) Hz
Between, the alarm of governor controller PCC output power transmitter；
5.2 continuous 4 times so, it is accumulative be more than or equal to 84MW, at this time if mains frequency exceeds (50 ± A) Hz range,
Or be in mains frequency and start in the time B of timing beyond (50 ± A) Hz, governor controller PCC judges power transducer
Normally；
The active double sampling deviation of 5.3 generating sets is 4 times discontented beyond 21MW, and governor controller PCC judges that power becomes
Send device normal.
6. definite value A is 0.1Hz, B 80ms.The mains frequency used is the mains frequency before filtering.
Sensor false alarm caused by evading as auxiliary judgment present invention introduces mains frequency because of grid power fluctuation.
Implementation method are as follows: when mains frequency and 50Hz deviation are more than a definite value A or be more than definite value A timing set time B inner shield
The overproof alarm of power transducer.Definite value A and definite value B can be adjusted according to the actual situation.Such as: some hydropower station governor at present
The definite value A used is 0.1Hz, B 80ms.The governor power because of caused by power network fluctuation can thus be effectively reduced
Transmitter false alarm.The mains frequency used in method is the mains frequency before filtering.
Application effect of the invention:
After some hydropower station #8 units above method, this unit was from 2 months in November, 2016 in 2016,
Stable operation 9 months, governor power transducer false alarm does not occur again, during which the unit of other unmodified programs is in power grid
Still the alarm of governor power transducer is quoted when fluctuation, and governor is caused to switch to aperture mode operation by power mode.Through
4 secondary undulations occur altogether for statistics, the power grid of the submitting route in the power station in 2016, in addition to power transducer wrong report does not occur for #8 unit
Alert, other units still report power transducer failure by mistake in each power network fluctuation.It can be seen that the above method can drop significantly
The case where low-power transmitter false alarm, improves Genset governor system stable operation ability and unit load stability contorting
Ability, powerful guarantee and promotion network load stability contorting.
Detailed description of the invention
Fig. 1 is governor hardware block diagram (power transducer is related)
Fig. 2 is governor software flow pattern (power transducer is related)
Fig. 3 is that the present invention relates to former governor power transducer alarming logic figures.
Fig. 4 is that the present invention relates to pull-in frequency auxiliary judgment governor power transducer alarming logic figures.
Specific embodiment
Here is a embodiment of the invention, is described further in conjunction with attached drawing to the principle of the present invention.
Using three-phase four-wire system connection, (terminal of GLB:1,3,4,6,7,9 connects governor power transducer as shown in Figure 1 respectively
CT1 secondary side: A, N, B, N, C, N phase, the terminal of GLB:2,5,8,11 meet PT1 secondary side: A, B, C, N phase, GLB:14,13 ends respectively
Son connects external DC24V power supply+,-power supply, GLB:41, the output of 42 terminals 4~20mA active power analog signals all the way), GLB
Output signal (GLB:41,42 terminals) accesses governor controller PCC analog quantity mixing module (PCC-AM:3,4 terminals), as
Active power signal.Mains frequency signal source is the secondary side (A, B phase) of main transformer low-pressure side PT2, signal access isolation transformation
Device BV10 input side (1,2 terminal) accesses waveform shaping plate ZX10(4,5 ends by BV10 outlet side (3,4 terminal) after being isolated
Son), governor controller PCC high speed counting module (PCC- is connected to by ZX10 outlet side (17,19 terminal) after waveform shaping
AM:3,1 terminal), as mains frequency signal.
Wherein, the 3CP340.60-2 of the model Bei Jialai of governor controller PCC, the type of the 1st isolating transformer BV10
Number for magnificent electronics of shining PE4117-I-E69 5VA；
The PE4117-I-E69 5VA of the magnificent electronics of model credit of 2nd isolating transformer BV11；
The NSD_TS_00001B that the model what one is particularly good at of waveform shaping plate ZX10 reaches；
Model SINEAX CAM, CAMILLE the BAUER standard type of power transducer GLB；
The LMZ34-20 of model Shenyang Transformer Co., Ltd. of generator outlet Current Transmit 1；
The JDZX4-20 of model Shenyang Transformer Co., Ltd. of generator outlet voltage transformer pt 1.
Speed regulator system acquires that (sampling period 10ms) unit is active, mains frequency signal in real time, and program starts to judge:
1. unit is active between lower limit (0MW), the upper limit (700MW), system tentatively judges that power transducer is normal；
2. unit is active to be greater than the upper limit, continuous 10 samplings are in this way, system output power transmitter is alarmed；Less than 10
Secondary, system is not alarmed；
3. unit is active to be less than lower limit, continuous 10 samplings are in this way, system output power transmitter is alarmed；Less than 10
Secondary, system is not alarmed；
4. the active double sampling deviation of unit is less than 21MW on the basis of step 1, system judges that power transducer is normal；
5. the active double sampling deviation of unit is more than or equal to 21MW on the basis of step 1
5.1 continuous 4 times so, it is accumulative be more than or equal to 84MW, at this time if mains frequency is continually and steadily in (50 ± A) Hz
Between (live A takes 0.1Hz), system output power transmitter alarm；
5.2 continuous 4 times so, it is accumulative be more than or equal to 84MW, at this time if mains frequency exceeds (50 ± A) Hz range,
Or be in mains frequency and start in the time B of timing (live B takes 80ms) beyond (50 ± A) Hz, system judges power pick-up
Device is normal；
The active double sampling deviation of 5.3 units is 4 times discontented beyond 21MW, and system judges that power transducer is normal.
Claims (2)
1. the fault-tolerance approach for avoiding power network fluctuation that governor power transducer is caused to be alarmed, governor power transducer GLB is used
Three-phase four-wire system connection, input signal come from generator outlet voltage transformer pt 1, generator outlet Current Transmit 1,
Governor power transducer GLB output signal is 4-20mA analog quantity, accesses the analog quantity hybrid guided mode of governor controller PCC
Block, as active power signal, governor controller PCC acquires that generating set is active, mains frequency signal in real time, and program starts
Judgement, its step are as follows:
1) generating set is active between lower limit, the upper limit, and governor controller PCC tentatively judges that power transducer is normal,
2) generating set is active is greater than the upper limit, and continuous 10 samplings are in this way, governor controller PCC output power transmitter report
It is alert；Less than 10 times, governor controller PCC does not alarm,
3) generating set is active is less than lower limit, and continuous 10 samplings are in this way, governor controller PCC output power transmitter report
It is alert；Less than 10 times, governor controller PCC does not alarm,
4) on the basis of step 1), the active double sampling deviation of generating set is less than 21MW, and governor controller PCC judges power
Transmitter is normal,
It is characterized in that, mains frequency signal source is main transformer low-pressure side voltage transformer pt 2, the signal is by the 1st isolation transformation
Device BV10 accesses waveform shaping plate ZX10, and generator outlet voltage transformer pt 1 is whole through the 2nd isolating transformer BV11 access waveform
Shape plate ZX10, the output signal of waveform shaping plate ZX10 is connected to governor controller PCC high speed counting module, as mains frequency
Signal, mains frequency are as follows as auxiliary judgment:
5) on the basis of step 1), the active double sampling deviation of generating set is more than or equal to 21MW, and program judgement is as follows:
A. continuous 4 times so, it is accumulative be more than or equal to 84MW, at this time if mains frequency is continually and steadily between (50 ± A) Hz,
The alarm of governor controller PCC output power transmitter；
B. continuous 4 times so, it is accumulative be more than or equal to 84MW, at this time if mains frequency exceeds (50 ± A) Hz range, or place
In the time B that mains frequency starts timing beyond (50 ± A) Hz, governor controller PCC judges that power transducer is normal；
C. the active double sampling deviation of generating set is 4 times discontented beyond 21MW, and governor controller PCC judges power transducer just
Often, definite value A is 0.1Hz, B 80ms.
2. the fault-tolerance approach according to claim 1 for avoiding power network fluctuation that governor power transducer is caused to be alarmed, special
Sign is the mains frequency used for the mains frequency before filtering.
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| CN201710705872.1A CN107317346B (en) | 2017-08-17 | 2017-08-17 | The fault-tolerance approach for avoiding power network fluctuation that governor power transducer is caused to be alarmed |
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| CN113339184A (en) * | 2021-06-06 | 2021-09-03 | 中国长江电力股份有限公司 | Active power control device and processing method for speed regulator of giant hydroelectric generating set |
| CN114498765B (en) * | 2021-11-01 | 2024-01-26 | 华能济宁运河发电有限公司 | Control method and system for power transmitter of generator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103426491A (en) * | 2012-05-24 | 2013-12-04 | 中国核动力研究设计院 | Nuclear power plant process parameter reliability processing method |
| CN106301095A (en) * | 2016-08-29 | 2017-01-04 | 江苏大学 | A kind of multi-motor coordination control system nerve network reverse fault tolerant control method |
| CN106969266A (en) * | 2017-04-13 | 2017-07-21 | 浙江大学 | The pipeline pressure monitoring device on-line operation method for diagnosing status of public supply mains |
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| US8731027B2 (en) * | 2011-12-05 | 2014-05-20 | Battelle Energy Alliance, Llc | Methods and apparatuses using filter banks for multi-carrier spread-spectrum signals |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103426491A (en) * | 2012-05-24 | 2013-12-04 | 中国核动力研究设计院 | Nuclear power plant process parameter reliability processing method |
| CN106301095A (en) * | 2016-08-29 | 2017-01-04 | 江苏大学 | A kind of multi-motor coordination control system nerve network reverse fault tolerant control method |
| CN106969266A (en) * | 2017-04-13 | 2017-07-21 | 浙江大学 | The pipeline pressure monitoring device on-line operation method for diagnosing status of public supply mains |
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