CN105932686B - The method that power plant is replaced with to synchronous motor with work drive motor - Google Patents
The method that power plant is replaced with to synchronous motor with work drive motor Download PDFInfo
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- CN105932686B CN105932686B CN201610357017.1A CN201610357017A CN105932686B CN 105932686 B CN105932686 B CN 105932686B CN 201610357017 A CN201610357017 A CN 201610357017A CN 105932686 B CN105932686 B CN 105932686B
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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
- H02J3/12—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
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- 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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- Control Of Eletrric Generators (AREA)
Abstract
The present invention in order to solve it is existing using asynchronous motor as station-service work drive motor, in synchronous generator operational process, power plant busbar voltage fluctuation range excessive the problem of leading to unit safety hydraulic performance decline, provide a kind of method that power plant is replaced with to synchronous motor with work drive motor.This method, by way of testing and being fitted, generator station-service working bus bar voltage and the relation curve of stator voltage and house transformer high-pressure side reactive power are obtained, obtains maximum Auxiliary System capacitive reactive power vacancy value, and then determines synchronous motor parameter as station-service work drive motor.The present invention proposes the test method that experiment is combined with curve matching, Validity Test power plant System Reactive Power vacancy value, easily determining station-service work drive motor parameter information, unit auxiliary bus bar voltage can be maintained in rational range, avoid the big ups and downs of auxiliary bus bar voltage, the energy-saving effect of unit is improved, there is higher economy and practical value.
Description
Technical field
The present invention relates to power-plant operation and idle control correlative technology field, specifically, being related to a kind of by power plant
The method that station-service work drive motor replaces with synchronous motor, using solve it is existing using asynchronous motor as station-service work drive motor,
In synchronous generator operational process, power plant busbar voltage fluctuation range is excessive to lead to asking for unit safety hydraulic performance decline
Topic.
Background technology
With economic development, Power System Interconnection scale constantly increases, and power construction speed is also synchronous to be accelerated, as power grid is to electricity
The higher and higher of quality requirement is pressed, each unit is required to have enough Reactive-power control abilities, generator in unit running process
Voltage adjusts very frequent, and particularly, the range of operation of generator voltage is generally the 90%~105% of rated value, and station-service
The range of operation of electricity is generally the 95%~105% of rated value, in operation inevitably outlet unit in order to meet into phase
The service power voltage setting of demand can not meet unit lagging phase operation, and vice versa.
Meanwhile with the propulsion that national minimum discharge, energy-saving and emission-reduction work, energy saving also the carrying of station-service subsidiary engine (work drive motor)
Height also has part of generating units to improve station-service subsidiary engine by the method that permanent magnet synchronous motor replaces asynchronous motor at present to new high degree
Working efficiency.
Invention content
The present invention in order to solve it is existing using asynchronous motor as station-service work drive motor, synchronous generator operational process
In, it power plant busbar voltage fluctuation range excessive the problem of leading to unit safety hydraulic performance decline, provides a kind of by power plant
The method that station-service work drive motor replaces with synchronous motor.
Technical problems to be solved needed for the present invention can be achieved through the following technical solutions：
A kind of method that power plant is replaced with to synchronous motor with work drive motor, original station-service work drive motor are asynchronous
Motor, which is characterized in that include the following steps：
1st, multiple generator active power state of value for intending experiment are preset, in original asynchronous motor as station-service work electricity
In the case of machine and access, by way of testing and being fitted, factory of the generator under each active power state of value is obtained respectively
With the relation curve between work busbar voltage and stator voltage and station-service working bus bar voltage and house transformer high-pressure side
The relation curve of reactive power；
2nd, maximum Auxiliary System capacitive reactive power vacancy value of the generator under multiple active power state of value is obtained；
3rd, original asynchronous motor is replaced as station-service work drive motor using the adjustable synchronous motor of excitation, and according to most
Big Auxiliary System capacitive reactive power vacancy value and the parameter of original asynchronous motor determine the parameter of synchronous motor.
In the present invention, in step 1, preset multiple generator active power state of value for intending experiment have including generator
Work(power is the state of rated value.
Preset multiple generator active power state of value for intending experiment, are rated value including generator active power
75% and 50% state.
In the present invention, in step 1, during the experiment fitting under each active power state of value of generator, pass through guarantor
The constant mode of generator active power value is held, gives the mode of multiple and different stator voltage values, fitting station-service working bus bar electricity
Relation curve between pressure and stator voltage.
Given multiple and different stator voltage values, at least one is stator voltage rated value.
Given multiple and different stator voltage values are the number in 97% to 102% section of stator voltage rated value
Value.
In the present invention, in step 1, during the experiment fitting under each active power state of value of generator, by stator
Voltage is set as rated value, in a house transformer low-pressure side reactive-load compensator in parallel, is held by given multiple and different compensation
Amount, fitting station-service working bus bar voltage and the relation curve of house transformer high-pressure side reactive power.
In the present invention, in step 2, during the experiment fitting under each active power state of value of generator, according to factory
With work busbar voltage and stator voltage between relation curve, by stator voltage in stator voltage rated value 90% to 105%
When section changes, station-service working bus bar voltage max and minimum value are obtained, and according to station-service working bus bar voltage and unit transformer
The relation curve of depressor high-pressure side reactive power obtains the Auxiliary System capacitive reactive power under each active power state of value of generator
Vacancy value, and using maximum Auxiliary System capacitive reactive power vacancy value as maximum Auxiliary System capacitive reactive power vacancy value.
In the present invention, in step 3, original asynchronous motor is 1 or n platforms, and original asynchronous motor is always defeated
Go out bearing power for Psc, if the rated output bearing power of wherein 1 original asynchronous motor is Psn, then what is used synchronizes electricity
The specified active load S of motivation needs to meet,
Wherein, Qccmax is maximum Auxiliary System capacitive reactive power vacancy value.
In the present invention, generator maximum Auxiliary System capacitive reactive power vacancy under multiple active power state of value is being obtained
Value, while maximum Auxiliary System inductive reactive power vacancy value is obtained, the synchronous motor has under-excitation ability, and under-excitation ability is more than
Maximum Auxiliary System inductive reactive power vacancy value.
In the present invention, the synchronous motor is installed with excitation regulation device, and the excitation regulation device has constant voltage
Adjusting and/or invariable power factor regulatory function.
When the synchronous motor excitation regulating device operates in constant voltage regulation pattern, having voltage transfinites, is idle super
Limit one or more than one kinds of combinations in the function that transfinites with electric current.
The synchronous motor and excitation regulation device are provided with low voltage ride-through capability.
Asynchronous motor is replaced as station-service work electricity using the adjustable synchronous motor of excitation the invention discloses a kind of
The method of machine, it is proposed that the experiment test method that is combined with curve matching, method proposed by the present invention, Validity Test generate electricity
Factory's Auxiliary System no-power vacancy value, easily determining station-service work drive motor parameter information, while the method proposed using invention, machine
Group auxiliary bus bar voltage can be maintained in rational range, avoided the big ups and downs of auxiliary bus bar voltage, improved unit
Energy-saving effect has higher economy and practical value.
Description of the drawings
It is further illustrated the present invention below in conjunction with the drawings and specific embodiments.
Fig. 1 is the flow chart of the present invention.
Specific embodiment
In order to make the technical means, creative features, achievement of purpose and effectiveness of the invention easy to understand, with reference to tool
Body illustrates, and the present invention is further explained.
Idea of the invention is that by being used as power plant work drive motor using asynchronous motor to existing, generate electricity
The analysis of factory's auxiliary bus bar voltage fluctuation situation, finds in existing synchronous generator operational process, due to using asynchronous motor
As station-service work drive motor, lead to asking for unit safety hydraulic performance decline there are power plant busbar voltage fluctuation range is excessive
Topic is provided by the present invention and a kind of power plant is replaced with the method for synchronous motor with work drive motor to solve above-mentioned ask
Topic.
Referring to the method that power plant is replaced with synchronous motor by Fig. 1, the present invention with work drive motor, basic principle is pre-
If multiple generator active power state of value for intending experiment, mode test method is combined come meter with curve matching by experiment
Relevant parameter when calculating using the adjustable synchronous motor of excitation as station-service work drive motor, then encouraged by adjusting synchronous motor
Magnetic so that unit auxiliary bus bar voltage can be maintained in rational range, avoid the big ups and downs of auxiliary bus bar voltage.
Here, a certain active power state of value of generator refers to, the active power of generator is set as preset number
Value by changing the size of other parameter, and then obtains the various parameters needed.For the present invention, preset multiple plans
The generator active power state of value of experiment, preferably at least including the state that generator active power is rated value, then this
On the basis of, several generator active power state of value are still further chosen, form multiple generator active power state of value, complete examination
It tests and curve fitting process, in present embodiment, to preset 3 generator active power state of value, illustrates, remove
Using generator active power for rated value as a state outside, also have chosen generator active power as 75% He of rated value
50% state.It is, of course, understood that preset multiple generator active power state of value for intending experiment, it can not also
Including the state that generator active power is rated value.
Therefore, in present embodiment, in original asynchronous motor as station-service work drive motor and in the case of accessing, first
Generator active power is set as rated value Pn, stator voltage is set as rated value Utn, records generator reactive power at this time
Q1, station-service working bus bar voltage Uc1, house transformer high-pressure side active-power P c1 and reactive power Q c1；
Then, it is 0.99Utn to reduce generator unit stator voltage, and generator reactive power Q2, station-service work are female at this time for record
Line voltage Uc2, house transformer high-pressure side active-power P c2 and reactive power Q c2；
Then, it is 0.98Utn that continuing, which reduces generator unit stator voltage, records generator reactive power Q3, station-service work at this time
Make busbar voltage Uc3, house transformer high-pressure side active-power P c3 and reactive power Q c3；
In this way by above-mentioned experiment process, it can be fitted and obtain generator unit stator voltage and generator reactive power, stator
Relation curve between voltage and station-service working bus bar voltage.
In the above process of present embodiment, during keeping generator active power value constant, 3 are given not
Same stator voltage value, and employ since stator voltage rated value, the mode that gradually small variable quantity is reduced, Ke Yili
Solution, the above are only the exemplary illustration carried out, in practical operation, equally be may be used specified from stator voltage
Value starts, and gradually small variable quantity carries out increased mode and gives different stator voltage values, and given stator voltage value can also
More than 3, to promote the accuracy of relation curve fitted.In fact, for the present invention, given is multiple and different fixed
Sub- voltage value is preferably the numerical value in 97% to 102% section of stator voltage rated value.
Relationship between stator voltage and station-service time variant voltage is found out by stator voltage change, but due to by station service
Voltage restricts, stator voltage can not rated value 90%~105% entire scope it is adjustable, but rated voltage certainly may be used
With operation, so starting to adjust in the specified stator voltage of generator, by the several points of up and down adjustment, the foundation of reconnaissance is exactly station-service
For piezoelectric voltage in allowed band, general 97%~102% stator voltage is adjustable.
Continue that generator active power is kept to be set as rated value Pn, carry out experiment and the curve fitting process of next step：
At this point, in a house transformer low-pressure side reactive-load compensator in parallel, compensation capacity is set as K1, adjusts generator
Stator voltage is rated value Utn, and house transformer high-pressure side reactive power Q c4, house transformer high-pressure side have after record compensation
Work(power P c4, corresponding station-service working bus bar voltage Uc4；
Then, the compensation capacity of reactive-load compensator is replaced, it, will after a house transformer low-pressure side reactive-load compensator in parallel
Compensation capacity is set as K2, and adjustment generator unit stator voltage is rated value Utn, and house transformer high-pressure side is idle after record compensation
Power Qc5, house transformer high-pressure side active-power P c5, corresponding station-service working bus bar voltage Uc5；
In this way, house transformer high-pressure side active-power P c1, the reactive power Q c1 and station-service by aforementioned acquisition work
Busbar voltage Uc1 can fit station-service working bus bar voltage and the idle relation curve in house transformer high-pressure side.Equally may be used
With understanding, the compensation capacity of reactive-load compensator can also be set as more, and above-mentioned is only to use to be set as 2 progress
Exemplary illustration.
By the above process, that is, generator active power value is completed as two relation curves in the state of rated value：
1st, the relation curve between station-service working bus bar voltage and stator voltage,
2nd, station-service working bus bar voltage and the relation curve of house transformer high-pressure side reactive power.
It is the pass between station-service working bus bar voltage and stator voltage under specified state of value using generator active power value
It is curve, when showing that stator voltage changes between stator voltage rated value 90%~105%, station-service working bus bar voltage is most
Small value Ucmin1 and maximum value Ucmax1, here by above-mentioned minimum value and maximum value, be set as station-service working bus bar it is expected under
Ucmin, upper limit Ucmax are limited to, it is bent in conjunction with the relationship of station-service working bus bar voltage and house transformer high-pressure side reactive power
Line, you can it is Auxiliary System capacitive reactive power vacancy Qcc1 and perceptual nothing in the state of rated value to obtain generator active power value
Work(vacancy Qcl1.With reference to the relation curve of station-service working bus bar voltage and station-service high-pressure side reactive power, Auxiliary System capacitive without
Work(vacancy is the corresponding high-pressure side reactive power of the minimum value high pressure corresponding with Ucmin of station-service working bus bar voltage allowed band
The difference of side reactive power；Inductive reactive power vacancy allows for the corresponding high-pressure side reactive powers of Ucmax and station-service working bus bar voltage
The difference of the corresponding high-pressure side reactive power of maximum value of range.
Experiment and the curve fitting process under first generator active power state of value are just completed in this way, in this implementation
In mode, generator active power state of value is adjusted to generator active power as rated value 75% and 50%, is repeated above-mentioned
Process obtains generator active power state of value as rated value 75% respectively, Auxiliary System capacitive reactive power vacancy Qcc2, perceptual nothing
Work(vacancy Qcl2 and go out generator active power value state for rated value 50%, Auxiliary System capacitive reactive power vacancy Qcc3 and sense
Property no-power vacancy Qcl3.
Qcc1, Qcc2, Qcc3 are taken with reference to what aforementioned process obtained, wherein maximum value will be used as maximum Auxiliary System capacitive reactive power
Vacancy value Qccmax, similarly, Qcl1, Qcl2, the Qcl3 obtained using aforementioned process wherein maximum value will be used as maximum station-service system
Togetherness no-power vacancy value Qclmax.
After maximum Auxiliary System capacitive reactive power vacancy value Qccmax is obtained, you can determine to synchronize electricity using excitation is adjustable
Parameter of the motivation as station-service work drive motor, and then realize the adjustment to station-service working bus bar voltage, concrete mode is as follows：
If original asynchronous motor, as 1 or n platforms, original asynchronous motor makees total output loading power as Psc, if its
In 1 asynchronous motor rated output bearing power for Psn, then during using synchronous motor as station-service work drive motor, volume
Determining active load S needs to meet,Wherein, Qccmax is maximum Auxiliary System capacitive reactive power
Vacancy value, when original asynchronous motor be 1 when, above-mentioned formula can simplify for：
In the present invention, it is equally to have to make that maximum Auxiliary System inductive reactive power vacancy value Qclmax is obtained in aforementioned process
, for preferred, the synchronous motor as station-service work drive motor preferably has under-excitation ability, then under-excitation ability needs
It is greater than maximum Auxiliary System inductive reactive power vacancy value Qclmax.
In addition to this, the present invention is preferably equipped with excitation regulation device as the synchronous motor of station-service work drive motor,
Excitation regulation device has constant voltage regulation and/or invariable power factor regulatory function.When synchronous motor excitation regulating device is transported
Row in constant voltage regulation pattern, have voltage transfinite, it is idle transfinite transfinite in function with electric current one or more than one kinds of
Combination.Synchronous motor and excitation regulation device are preferably provided with low voltage ride-through capability.
Only preferred embodiments of the present invention are described above, but are not to be construed as limiting the scope of the invention.This
Invention is not only limited to above example, and concrete structure is allowed to vary.In short, all guarantors in independent claims of the present invention
The various change made in the range of shield is within the scope of the present invention.
Claims (10)
1. power plant to be replaced with to the method for synchronous motor with work drive motor, original station-service work drive motor is asynchronous electric
Machine, which is characterized in that include the following steps：
1) preset it is multiple intend experiment generator active power state of value, original asynchronous motor as station-service work drive motor simultaneously
In the case of access, by way of testing and being fitted, station-service work of the generator under each active power state of value is obtained respectively
Make relation curve between busbar voltage and stator voltage and station-service working bus bar voltage and house transformer high-pressure side is idle
The relation curve of power；
2) maximum Auxiliary System capacitive reactive power vacancy value of the generator under multiple active power state of value is obtained；
3) original asynchronous motor is replaced as station-service work drive motor using the adjustable synchronous motor of excitation, and according to maximum factory
The parameter of synchronous motor is determined with the parameter of system capacitive reactive power vacancy value and original asynchronous motor.
2. the method according to claim 1 that power plant is replaced with to synchronous motor with work drive motor, feature exist
In：In step 1), preset multiple generator active power state of value for intending experiment, are rated value including generator active power
State.
3. the method according to claim 2 that power plant is replaced with to synchronous motor with work drive motor, feature exist
In：Preset multiple generator active power state of value for intending experiment, are rated value 75% including generator active power
With 50% state.
4. the method according to any one of claims 1 to 3 that power plant is replaced with to synchronous motor with work drive motor,
It is characterized in that：In step 1), during the experiment fitting under each active power state of value of generator, by keeping generator
The constant mode of active power value gives the mode of multiple and different stator voltage values, is fitted station-service working bus bar voltage and stator
Relation curve between voltage.
5. the method according to claim 4 that power plant is replaced with to synchronous motor with work drive motor, feature exist
In：Given multiple and different stator voltage values, at least one is stator voltage rated value；
Alternatively, given multiple and different stator voltage values, are the number in 97% to 102% section of stator voltage rated value
Value.
6. the method according to any one of claims 1 to 3 that power plant is replaced with to synchronous motor with work drive motor,
It is characterized in that：In step 1), during the experiment fitting under each active power state of value of generator, stator voltage is set
For rated value, in a house transformer low-pressure side reactive-load compensator in parallel, by given multiple and different compensation capacity, it is fitted factory
With the relation curve of work busbar voltage and house transformer high-pressure side reactive power.
7. the method according to claim 1 that power plant is replaced with to synchronous motor with work drive motor, feature exist
In：In step 2), during the experiment fitting under each active power state of value of generator, according to station-service working bus bar voltage
Relation curve between stator voltage when stator voltage is changed in 90% to 105% section of stator voltage rated value, obtains
Station-service working bus bar voltage max and minimum value, and according to station-service working bus bar voltage and the idle work(in house transformer high-pressure side
The relation curve of rate obtains the Auxiliary System capacitive reactive power vacancy value under each active power state of value of generator, and will wherein
Maximum Auxiliary System capacitive reactive power vacancy value is as maximum Auxiliary System capacitive reactive power vacancy value.
8. the method according to claim 1 that power plant is replaced with to synchronous motor with work drive motor, feature exist
In：In step 3), original asynchronous motor is 1 or n platforms, and original total output loading power of asynchronous motor is
Psc, if the rated output bearing power of wherein 1 original asynchronous motor is Psn, then the synchronous motor used is specified active
Load S needs to meet,
Wherein, Qccmax is maximum Auxiliary System capacitive reactive power vacancy value.
9. the method according to claim 7 that power plant is replaced with to synchronous motor with work drive motor, feature exist
In：Generator maximum Auxiliary System capacitive reactive power vacancy value under multiple active power state of value is being obtained, while obtain maximum
Auxiliary System inductive reactive power vacancy value, the synchronous motor have under-excitation ability, and under-excitation ability is more than maximum Auxiliary System sense
Property no-power vacancy value.
10. the method according to claim 1 that power plant is replaced with to synchronous motor with work drive motor, feature exist
In：The synchronous motor is installed with excitation regulation device, and the excitation regulation device has constant voltage regulation and/or invariable power
Factor regulatory function；
Alternatively, the synchronous motor is installed with excitation regulation device, the synchronous motor excitation regulating device operates in perseverance
During voltage shaping modes, have voltage transfinite, the idle one or more than one kinds of combinations transfinited with electric current in function of transfiniting；
Alternatively, the synchronous motor is installed with excitation regulation device, the synchronous motor and excitation regulation device are provided with
Low voltage ride-through capability.
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| SE534522C2 (en) * | 2008-11-13 | 2011-09-20 | Subsee Ab | Method and apparatus for off-line testing of multi-phase AC machines |
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| CN102522774A (en) * | 2011-12-18 | 2012-06-27 | 北京科诺伟业科技有限公司 | Dual-motor switching control method for wind generating set |
| CN103823183A (en) * | 2014-02-28 | 2014-05-28 | 国家电网公司 | Method for measuring stator open circuit transient time-constant of synchronous generator |
| CN104734192A (en) * | 2015-04-03 | 2015-06-24 | 国家电网公司 | Wholly-balanced micro-grid system |
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