CN106849059A - Generating set under-excitation ability method for digging based on analog simulation - Google Patents
Generating set under-excitation ability method for digging based on analog simulation Download PDFInfo
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- CN106849059A CN106849059A CN201710027734.2A CN201710027734A CN106849059A CN 106849059 A CN106849059 A CN 106849059A CN 201710027734 A CN201710027734 A CN 201710027734A CN 106849059 A CN106849059 A CN 106849059A
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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
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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
- 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]
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- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Management, Administration, Business Operations System, And Electronic Commerce (AREA)
Abstract
The invention discloses a kind of generating set under-excitation ability method for digging based on analog simulation, including judge whether generating set leading phase test has under-excitation ability excavated space；If having under-excitation ability excavated space, station service electrical system model is built；Generating set in station service electrical system model is accessed into Power System Simulator, and using the service data between power network low-load period, emulation obtains the under-excitation ability of generating set under state between power network low-load period；After the service power of generating set has been switched into standby variable power source, leading phase test is carried out, obtain generating set under-excitation ability in itself；Compare between power network low-load period the under-excitation ability of generating set and generating set under-excitation ability in itself, the weak under-excitation ability actually used as generating set between low-load period of selection under-excitation ability under state.The present invention can give full play to the due under-excitation ability of generating set, improve safe operation of electric network level, have a good application prospect.
Description
Technical field
The present invention relates to source net coordination technique field, and in particular to a kind of generating set under-excitation ability based on analog simulation
Method for digging.
Background technology
With a large amount of inputs of extra-high voltage alternating current-direct current long distance transmission line, the capacitive reactive power of power network constantly increases, especially
Between low-load period, high voltage problem becomes increasingly conspicuous, due to generating set leading phase operation, can largely absorb grid excess without
Work(, alleviates the high voltage problem of network system significantly.But, the generating set during the Spring Festival in recent years enters phase situation point
Analysis, nearest three annual of generating set enters phase depth and constantly deepens, but line voltage higher than limit value situation increasing, by
This, it is seen that the idle situation of current electric grid is more and more severeer, and current power network proposes requirement higher to unit under-excitation ability.
At present, the under-excitation ability of generating set be by leading phase test obtain, although leading phase test be by set end voltage,
The limiting factors such as generator terminal electric current, generator rotor angle, station-service voltage, temperature determine the under-excitation ability of unit, but, by lot of experiments knot
Fruit shows, most of unit is limited to station-service voltage during leading phase test, and station-service voltage then by the low change of factory, factory's change high and
Main transformer is connected with network system, and station-service voltage fluctuates with the fluctuation of line voltage, therefore, the machine obtained by leading phase test
Group under-excitation ability is the under-excitation ability of generating set actual motion under reflection current electric grid voltage, with the drop of line voltage
Low, generating set under-excitation ability weakens；Line voltage is raised, and generating set under-excitation ability then strengthens.And it is actually needed generator
During group leading phase operation, between network system is in low-load period, line voltage is in a high position, now, the under-excitation ability of generating set
The under-excitation ability of leading phase test acquisition is far longer than, generating set under-excitation ability has the space of excavation.
By the description above, on the one hand, electric network reactive-load situation is more and more severeer, continue to increase reactor input it is same
When, the under-excitation ability demand to generating set between low-load period is increasing；On the other hand, the under-excitation ability of generating set is received
Electric network state limitation during leading phase test, tests the under-excitation ability for obtaining relative to under-excitation ability between power network low-load period, in than
More conservative state.Therefore, it is necessary to pass through technological means, the actual under-excitation ability of generating set is excavated, in power network underload
Period gives full play to generating set under-excitation ability, solves the higher problem of line voltage, is to work as to improve safe operation of electric network
Preceding urgent problem.
The content of the invention
Technical problem solved by the invention is existing leading phase test, obtains the unit under electric network state when generating set is tested
Under-excitation ability, in the problem than more conservative state.Generating set under-excitation ability excavation side based on analog simulation of the invention
Method, can analog simulation generating set carry out leading phase test between low-load period, and unit enters under obtaining power network low load condition
Phase ability, gives full play to the due under-excitation ability of generating set, greatly improves the qualified level of voltage, improves safe operation of electric network water
It is flat, have a good application prospect.
In order to achieve the above object, the technical solution adopted in the present invention is：
A kind of generating set under-excitation ability method for digging based on analog simulation, it is characterised in that：Including judging that generating set enters
Whether phase study has under-excitation ability excavated space；If generating set has under-excitation ability excavated space, station service electrical system is built
Model；Generating set in station service electrical system model is accessed into Power System Simulator, and Power System Simulator is low negative using power network
Service data during lotus, emulation obtains the under-excitation ability of generating set under state between power network low-load period；By generating set
After service power has switched to standby variable power source, leading phase test is carried out, obtain generating set under-excitation ability in itself；Compare power network low
The under-excitation ability of generating set and generating set under-excitation ability in itself, the weak conduct of selection under-excitation ability under state during load
The actually used under-excitation ability of generating set between low-load period, and limitation is encouraged according to under-excitation ability setting the low of field regulator
Parameter.
The foregoing generating set under-excitation ability method for digging based on analog simulation, it is characterised in that：Judge generating set
It is according to limiting factor and line voltage in unit leading phase test that whether leading phase test has the method for under-excitation ability excavated space
Depending on correlation, if limiting factor is strong with line voltage correlation, the generating set has under-excitation ability excavated space；If
Limiting factor is weak with line voltage correlation, then it has been unit under-excitation ability in itself, the generating that experiment obtains under-excitation ability
Unit does not have under-excitation ability excavated space.
The foregoing generating set under-excitation ability method for digging based on analog simulation, it is characterised in that：It is described to build station-service
Electric system model, comprises the following steps：
（1）Collect the house-service equipment parameter and service data of generating set；
（2）According to Auxiliary System in Power Plant physical cabling situation, part throttle characteristics, house-service equipment parameter and service data, factory is built
Electricity system model；
（3）By after the checking of measured data, completing building for station service electrical system model.
The foregoing generating set under-excitation ability method for digging based on analog simulation, it is characterised in that：The emulation is obtained
Between power network low-load period under state generating set under-excitation ability, during emulation, the Auxiliary System model that will put up accesses PSD-
BPA analogue systems, electric network data uses prior year power network underload actual operating data, under different active operating modes, progressively drops
Low generating set it is idle, by PSD-BPA simulation calculations magnitudes of voltage at different levels, until station-service voltage, set end voltage or power network electricity
Any limiting factor reaches limit value in pressure, using reactive power now as the machine of current active lower emulation between power network low-load period
Group under-excitation ability.
The foregoing generating set under-excitation ability method for digging based on analog simulation, it is characterised in that：It is described to compare power network
The under-excitation ability of the analog simulation of generating set and generating set under-excitation ability, hair in itself under different active operating modes between low-load period
Under-excitation ability is obtained by experiment by switching station service to standby a change after heel row removes station-service voltage limits factor to motor in itself,
The weak under-excitation ability actually used as generating set between low-load period of selection under-excitation ability, and field regulator is set with this
Low encourage limitation parameter.
The foregoing generating set under-excitation ability method for digging based on analog simulation, it is characterised in that：The analogue system
It is PSD-BPA analogue systems.
The beneficial effects of the invention are as follows：Generating set under-excitation ability method for digging based on analog simulation of the invention, by
Because the generating set under-excitation ability that the voltage strong correlation restrictive condition of network system is obtained far is weaker than generator in leading phase test
The actual under-excitation ability of group, the present invention simulates electricity by building station service electrical system model in PSD-BPA Power System Simulators
Carry out leading phase test under net low load condition, obtain the under-excitation ability of generating set under state between power network low-load period, Ran Hou
Enterprising traveling phase study after standby variable power source has been switched to, line voltage strong correlation restrictive condition has been excluded, generating set has been obtained in itself
Under-excitation ability；Compare two kinds of under-excitation abilities, weak actually used as generating set between low-load period of selection under-excitation ability
Under-excitation ability, the purpose of generating set under-excitation ability is excavated so as to reach, more and more severeer in electric network reactive-load surplus situation, power network
Today of reactor input is continued to increase, generating set under-excitation ability is excavated, can not only given full play to when line voltage is higher
Unit under-excitation ability, absorption grid excess is idle, safe operation of electric network level is improve, while reducing reactor input cost
And O＆M cost, it is thing a kind of very meaningful and with economic worth, have a good application prospect.
Brief description of the drawings
Fig. 1 is the flow chart of the generating set under-excitation ability method for digging based on analog simulation of the invention.
Fig. 2 is the station service electrical system wiring schematic diagram of certain 600MW generating set.
Fig. 3 is that Fig. 2 station services have been connected to for wiring schematic diagram when becoming.
Specific embodiment
Below in conjunction with Figure of description, the present invention is further illustrated.
Generating set under-excitation ability method for digging based on analog simulation of the invention, due in leading phase test because of power network system
The generating set under-excitation ability that the voltage strong correlation restrictive condition of system is obtained much is weaker than the actual under-excitation ability of generating set, this
Invention is carried out into mutually trying by building station service electrical system model under simulating grid low load condition in Power System Simulator
Test, obtain the under-excitation ability of generating set under state between power network low-load period, then after having switched to for variable power source on carry out
Leading phase test, excludes line voltage strong correlation restrictive condition, obtains generating set under-excitation ability in itself；Compare two kinds and enter phase energy
Power, the weak under-excitation ability actually used as generating set between low-load period of selection under-excitation ability generates electricity so as to reach to excavate
The purpose of unit under-excitation ability, more and more severeer in electric network reactive-load surplus situation, power network continues to increase today of reactor input,
Generating set under-excitation ability is excavated, and unit under-excitation ability can be not only given full play to when line voltage is higher, absorbs grid excess
It is idle, safe operation of electric network level is improve, while reactor input cost and O＆M cost are reduced, as shown in figure 1, specifically
Comprise the following steps, judge whether generating set leading phase test has under-excitation ability excavated space；If generating set has into phase
Ability excavated space, builds station service electrical system model；Generating set in station service electrical system model is accessed into Power System Simulator,
And Power System Simulator is using the service data between power network low-load period, generator under state between emulation acquisition power network low-load period
The under-excitation ability of group；After the service power of generating set has been switched into standby variable power source, leading phase test is carried out, obtain generating set
The under-excitation ability of itself；Compare between power network low-load period the under-excitation ability of generating set and generating set under state in itself enter phase
Ability, the weak under-excitation ability actually used as generating set between low-load period of selection under-excitation ability, and phase energy is entered according to this
Power setting the low of field regulator encourages limitation parameter, and the example of specific sequence of steps can be as follows：
Step（1）, judge whether generating set leading phase test has under-excitation ability excavated space, limited according in unit leading phase test
Depending on factor processed and line voltage correlation, if limiting factor is strong with line voltage correlation, such as set end voltage, station-service voltage
And line voltage, wherein set end voltage with line voltage by main transformer connect, station-service voltage with set end voltage by factory high become, it is low
Factory becomes connection, therefore these three parameters change with grid voltage change, if limiting factor is these three, the generator
Group has under-excitation ability excavated space；If limiting factor is weak with line voltage correlation, temperature such as unshakable in one's determination, stator current, generator rotor angle,
Exciting current, this several parameter design correlation in itself with generator, and line voltage influences smaller to it, if these ginsengs during experiment
Count to up to limit, if limiting factor is above-mentioned several, experiment obtain under-excitation ability be unit in itself enter phase energy
Power, the generating set does not have under-excitation ability excavated space；
Step（2）If generating set has under-excitation ability excavated space, station service electrical system model is built, comprised the following steps：
（1）Collect the house-service equipment parameter and service data of generating set；
（2）According to Station Service Electrical-Energy physical cabling situation and part throttle characteristics, coordinate house-service equipment parameter and service data, build
Station service electrical system model；
（3）By after the checking of measured data, completing building for station service electrical system model；
Step（3）, the Auxiliary System model access PSD-BPA analogue systems that will be put up, electric network data is using prior year power network
Underload actual operating data, under different active operating modes, gradually reduces the idle of generating set, is emulated by PSD-BPA and counted
Magnitudes of voltage at different levels are calculated, until any limiting factor reaches limit value in station-service voltage, set end voltage or line voltage, each ginseng here
The corresponding limit values of number, are the common knowledge of those skilled in the art, are not just listed one by one here, using reactive power now as electricity
The unit under-excitation ability of current active lower emulation between net low-load period.
Step（4）, after the service power of generating set has been switched into standby variable power source, exclude the strong related limit of line voltage
Factor processed, while raising line voltage by accompanying test-run a machine group, leading phase test is carried out under line voltage higher state, is generated electricity
Unit under-excitation ability, such as Fig. 2 in itself is that the station service electrical system of certain 600MW generating set normally runs lower wiring schematic diagram, is opened
During exhibition leading phase test, the mode of connection makes, as shown in figure 3, Auxiliary System has been connected into standby change, have load to adjust due to playing standby change into
Pressure function, when station service buckling is low, can on-line tuning tap joint position, exclusion station-service voltage limiting factor, by accompanying test-run a machine
Group raises line voltage, set end voltage, line voltage limiting factor is excluded, so as to obtain unit under-excitation ability in itself；
Step（5）, compare between power network low-load period the under-excitation ability of the analog simulation of generating set and hair under different active operating modes
Group of motors under-excitation ability in itself, under-excitation ability is by switching station service to playing the standby heel row that becomes except station-service voltage limit to generator in itself
After value factor by test obtain, selection under-excitation ability it is weak as generating set between low-load period it is actually used enter phase energy
Power, and the low of field regulator is set with this encourage limitation parameter.
In sum, the generating set under-excitation ability method for digging based on analog simulation of the invention, being capable of analog simulation
Generating set carries out leading phase test between low-load period, and obtains unit under-excitation ability under power network low load condition, gives full play to
The due under-excitation ability of generating set, greatly improves the qualified level of voltage, improves safe operation of electric network level, should with good
Use prospect.
General principle of the invention and principal character and advantages of the present invention has been shown and described above.The technology of the industry
Personnel it should be appreciated that the present invention is not limited to the above embodiments, simply explanation described in above-described embodiment and specification this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appending claims and its
Equivalent thereof.
Claims (6)
1. the generating set under-excitation ability method for digging of analog simulation is based on, it is characterised in that：Including judging that generating set enters phase
Whether experiment has under-excitation ability excavated space；If generating set has under-excitation ability excavated space, station service electrical system mould is built
Type；Generating set in station service electrical system model is accessed into Power System Simulator, and Power System Simulator uses power network underload
The service data of period, emulation obtains the under-excitation ability of generating set under state between power network low-load period；By the factory of generating set
After standby variable power source has been switched power supply to, leading phase test is carried out, obtain generating set under-excitation ability in itself；Compare power network low negative
The under-excitation ability of generating set and generating set under-excitation ability in itself under state during lotus, the weak conduct of selection under-excitation ability are low
The actually used under-excitation ability of generating set during load, and ginseng is limited according to low the encouraging that the under-excitation ability sets field regulator
Number.
2. the generating set under-excitation ability method for digging based on analog simulation according to claim 1, it is characterised in that：Sentence
It is according to limiting factor in unit leading phase test that whether disconnected generating set leading phase test has the method for under-excitation ability excavated space
Depending on line voltage correlation, if limiting factor is strong with line voltage correlation, the generating set has under-excitation ability
Excavated space；If limiting factor is weak with line voltage correlation, experiment obtain under-excitation ability be unit in itself enter phase
Ability, the generating set does not have under-excitation ability excavated space.
3. the generating set under-excitation ability method for digging based on analog simulation according to claim 1, it is characterised in that：Institute
State and build station service electrical system model, comprise the following steps：
（1）Collect the house-service equipment parameter and service data of generating set；
（2）According to Auxiliary System in Power Plant physical cabling situation, part throttle characteristics, house-service equipment parameter and service data, factory is built
Electricity system model；
（3）By after the checking of measured data, completing building for station service electrical system model.
4. the generating set under-excitation ability method for digging based on analog simulation according to claim 1, it is characterised in that：Institute
The under-excitation ability that emulation obtains generating set under state between power network low-load period is stated, during emulation, the Auxiliary System mould that will be put up
Type accesses analogue system, and electric network data uses prior year power network underload actual operating data, under different active operating modes, progressively
The idle of generating set is reduced, by simulation calculation magnitudes of voltage at different levels, until appointing in station-service voltage, set end voltage or line voltage
One limiting factor reaches limit value, and phase is entered as the unit of current active lower emulation between power network low-load period using reactive power now
Ability.
5. the generating set under-excitation ability method for digging based on analog simulation according to claim 1, it is characterised in that：Institute
State and compare between power network low-load period under different active operating modes the under-excitation ability of the analog simulation of generating set with generating set in itself
Under-excitation ability, under-excitation ability is led to standby change after heel row removes station-service voltage limits factor is played by switching station service to generator in itself
Overtesting is obtained, the weak under-excitation ability actually used as generating set between low-load period of selection under-excitation ability, and is set with this
Determine the low of field regulator and encourage limitation parameter.
6. the generating set under-excitation ability method for digging based on analog simulation according to claim 4, it is characterised in that：Institute
Analogue system is stated for PSD-BPA analogue systems.
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| CN201710027734.2A CN106849059A (en) | 2017-01-16 | 2017-01-16 | Generating set under-excitation ability method for digging based on analog simulation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110086248A (en) * | 2019-05-15 | 2019-08-02 | 中国能源建设集团湖南省电力设计院有限公司 | One kind being used for grid type power plant auxiliary system |
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| CN105226710A (en) * | 2015-10-20 | 2016-01-06 | 国家电网公司 | Based on the generating set under-excitation ability dynamical min method of measured data |
| CN105785188A (en) * | 2016-04-12 | 2016-07-20 | 国网江苏省电力公司电力科学研究院 | High-capacity phase modifier test method with small power grid influence |
| CN106099979A (en) * | 2016-07-19 | 2016-11-09 | 国网河北省电力公司电力科学研究院 | A kind of unit under-excitation ability considering that the stabilization of power grids limits analyzes method |
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2017
- 2017-01-16 CN CN201710027734.2A patent/CN106849059A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105226710A (en) * | 2015-10-20 | 2016-01-06 | 国家电网公司 | Based on the generating set under-excitation ability dynamical min method of measured data |
| CN105785188A (en) * | 2016-04-12 | 2016-07-20 | 国网江苏省电力公司电力科学研究院 | High-capacity phase modifier test method with small power grid influence |
| CN106099979A (en) * | 2016-07-19 | 2016-11-09 | 国网河北省电力公司电力科学研究院 | A kind of unit under-excitation ability considering that the stabilization of power grids limits analyzes method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110086248A (en) * | 2019-05-15 | 2019-08-02 | 中国能源建设集团湖南省电力设计院有限公司 | One kind being used for grid type power plant auxiliary system |
| CN110086248B (en) * | 2019-05-15 | 2023-05-26 | 中国能源建设集团湖南省电力设计院有限公司 | Power station service system for grid-connected power plant |
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