CN108964138A - Simultaneous interconnecting method and system - Google Patents
Simultaneous interconnecting method and system Download PDFInfo
- Publication number
- CN108964138A CN108964138A CN201810839745.5A CN201810839745A CN108964138A CN 108964138 A CN108964138 A CN 108964138A CN 201810839745 A CN201810839745 A CN 201810839745A CN 108964138 A CN108964138 A CN 108964138A
- Authority
- CN
- China
- Prior art keywords
- frequency
- grid
- motor
- exciting current
- connected conditions
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- H02J3/40—Synchronising a generator for connection to a network or to another generator
Abstract
The present invention provides a kind of simultaneous interconnecting method and system.The simultaneous interconnecting method include: speed regulation device measurement to and motor frequency, judge to and the frequency of motor whether meet the first grid-connected conditions；When the frequency of simultaneously motor is unsatisfactory for the first grid-connected conditions, revolving speed of the speed regulation device adjustment to simultaneously motor, until frequency the first grid-connected conditions of satisfaction to simultaneously motor；Excitation regulation device measurement to and motor exciting current, judge to and the exciting current of motor whether meet the second grid-connected conditions；When the exciting current of simultaneously motor is unsatisfactory for the second grid-connected conditions, exciting current of the excitation regulation device adjustment to simultaneously motor, until exciting current the second grid-connected conditions of satisfaction to simultaneously motor；When meeting the first grid-connected conditions and the second grid-connected conditions simultaneously, synchronization device exports breaker closing instruction, adjustment process can be enabled rapider, greatly improve degree of regulation to avoid overshoot or less stress.
Description
Technical field
The present invention relates to power grid parallel technology fields, and in particular, to a kind of simultaneous interconnecting method and system.
Background technique
The universal synchronous motor parallel running institute structure by being distributed in the power plant of different geographical of modern power systems power supply
At, thus it is economical, reasonably utilize different types of energy, comprising: water energy, wind energy, nuclear energy, coal, natural gas etc. provide naturally
Source.Synchronous motor and Power System Interconnection are to be completed under the control of synchronization device by breaker, therefore the safety of synchronization device
Reliability service is the grid-connected premise of synchronous motor.In addition, when two different network systems are interconnected by exchange way, it is also desirable to
Synchronization device optimizes the interconnection moment, determines optimal closing time.
As the synchronous motor capacity to put into operation constantly increases, dash current caused by non-Switching Synchronization is in huge electric power
Under the action of will cause the damage of motor, also cause huge impact to make the stability of power grid be destroyed in power grid.Cause
This modern synchronous motor is generally furnished with intelligentized synchronization device, is predicted using automatic presynchronization mode same period point, is made
It obtains motor and carries out synchronization paralleling operation in the case where meeting certain pressure difference, frequency difference and angular difference.
From same period principle, when synchronization device captures same period point, the frequency of mains frequency and synchronous motor there must be
Frequency difference, to capture same period point.The synchronization device of the prior art will issue regulating command to excitation regulation device and speed regulation device,
The regulating command is added in the setting value of respective device, and corresponding device goes to respond again, it is possible to cause overshoot or less stress, lead
Adjustment process is caused to there is delay, simultaneous interconnecting postpones, and degree of regulation is not high.
Summary of the invention
The main purpose of the embodiment of the present invention is to provide a kind of simultaneous interconnecting method and system, avoids overshoot or owe
It adjusts, adjustment process is rapider, greatly improves degree of regulation.
To achieve the goals above, the embodiment of the present invention provides a kind of simultaneous interconnecting method, comprising:
Speed regulation device measurement to and motor frequency, judge to and the frequency of motor whether meet the first grid-connected conditions；
When the frequency of simultaneously motor is unsatisfactory for the first grid-connected conditions, revolving speed of the speed regulation device adjustment to simultaneously motor, until
Frequency to simultaneously motor meets the first grid-connected conditions；
Excitation regulation device measurement to and motor exciting current, judge to and the exciting current of motor whether meet second
Grid-connected conditions；
When the exciting current of simultaneously motor is unsatisfactory for the second grid-connected conditions, excitation regulation device adjustment being encouraged to simultaneously motor
Magnetoelectricity stream, until the exciting current to simultaneously motor meets the second grid-connected conditions；
When meeting the first grid-connected conditions and the second grid-connected conditions simultaneously, synchronization device exports breaker closing instruction.
The embodiment of the present invention also provides a kind of simultaneous interconnecting system, comprising:
Speed regulation device, for measure to and motor frequency, judge to and the frequency of motor whether meet the first grid-connected item
Part；When the frequency of simultaneously motor is unsatisfactory for the first grid-connected conditions, the revolving speed to simultaneously motor is adjusted, until the frequency to simultaneously motor
Meet the first grid-connected conditions；
Excitation regulation device judges whether the exciting current to simultaneously motor is full for measuring the exciting current to simultaneously motor
The second grid-connected conditions of foot；When the exciting current of simultaneously motor is unsatisfactory for the second grid-connected conditions, the excitation electricity to simultaneously motor is adjusted
Stream, until the exciting current to simultaneously motor meets the second grid-connected conditions；
Synchronization device refers to for exporting breaker closing when meeting the first grid-connected conditions and the second grid-connected conditions simultaneously
It enables.
Frequency of the speed regulation device measurement of the simultaneous interconnecting method and system of the embodiment of the present invention to simultaneously motor, judges to simultaneously
Whether the frequency of motor meets the first grid-connected conditions；When the frequency of simultaneously motor is unsatisfactory for the first grid-connected conditions, speed regulation device
The revolving speed to simultaneously motor is adjusted, until the frequency to simultaneously motor meets the first grid-connected conditions；Meanwhile excitation regulation device measurement to
And the exciting current of motor, judge to and the exciting current of motor whether meet the second grid-connected conditions；When the excitation to simultaneously motor
When electric current is unsatisfactory for the second grid-connected conditions, exciting current of the excitation regulation device adjustment to simultaneously motor, until encouraging to simultaneously motor
Magnetoelectricity stream meets the second grid-connected conditions；When meeting the first grid-connected conditions and the second grid-connected conditions simultaneously, synchronization device output is disconnected
Road device reclosing command can enable adjustment process rapider, greatly improve degree of regulation to avoid overshoot or less stress.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, embodiment will be described below
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some
Embodiment for those of ordinary skill in the art without creative efforts, can also be attached according to these
Figure obtains other attached drawings.
Fig. 1 is the flow chart of simultaneous interconnecting method in the embodiment of the present invention；
Fig. 2 is the structural block diagram of simultaneous interconnecting system in the embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Regulating command is issued to excitation regulation device and speed regulation device in view of the synchronization device of the prior art, which refers to
Order is added in the setting value of respective device, and corresponding device goes to respond again, it is possible to cause overshoot or less stress, cause to adjust
There is delay in journey, simultaneous interconnecting delay, degree of regulation is not high, and the embodiment of the present invention provides a kind of simultaneous interconnecting method, can keep away
Exempt from overshoot or less stress, enables adjustment process rapider, greatly improve degree of regulation.The present invention is carried out below in conjunction with attached drawing detailed
It describes in detail bright.
Fig. 1 is the flow chart of simultaneous interconnecting method in the embodiment of the present invention.As shown in Figure 1, simultaneous interconnecting method includes:
S101: speed regulation device measurement to and motor frequency, judge to and the frequency of motor whether meet the first grid-connected item
Part.
S102: when the frequency of simultaneously motor is unsatisfactory for the first grid-connected conditions, revolving speed of the speed regulation device adjustment to simultaneously motor,
Until the frequency to simultaneously motor meets the first grid-connected conditions.
S201: exciting current of the excitation regulation device measurement to simultaneously motor judges whether the exciting current to simultaneously motor is full
The second grid-connected conditions of foot.
S202: when the exciting current of simultaneously motor is unsatisfactory for the second grid-connected conditions, excitation regulation device adjustment is to simultaneously electricity
The exciting current of machine, until the exciting current to simultaneously motor meets the second grid-connected conditions.
S301: when meeting the first grid-connected conditions and the second grid-connected conditions simultaneously, synchronization device output breaker closing refers to
It enables.
Process as shown in Figure 1 is it is found that the speed regulation device in the simultaneous interconnecting method of the embodiment of the present invention is measured to simultaneously electricity
The frequency of machine, judge to and the frequency of motor whether meet the first grid-connected conditions；When the frequency to simultaneously motor is unsatisfactory for first simultaneously
When net condition, revolving speed of the speed regulation device adjustment to simultaneously motor, until the frequency to simultaneously motor meets the first grid-connected conditions；Meanwhile
Excitation regulation device measurement to and motor exciting current, judge to and the exciting current of motor whether meet the second grid-connected item
Part；When the exciting current of simultaneously motor is unsatisfactory for the second grid-connected conditions, excitation electricity of the excitation regulation device adjustment to simultaneously motor
Stream, until the exciting current to simultaneously motor meets the second grid-connected conditions；When meeting the first grid-connected conditions and the second grid-connected item simultaneously
When part, synchronization device exports breaker closing instruction, adjustment process can be enabled rapider, mentioned significantly to avoid overshoot or less stress
Degree of regulation is risen.
In one embodiment, the first grid-connected conditions are as follows: the frequency of power grid and the difference of frequency difference are equal to the frequency to simultaneously motor.
S102 is specifically included: when the difference of the frequency of power grid and frequency difference is greater than when the simultaneously frequency of motor, speed regulation device increases
Revolving speed greatly to simultaneously motor, until the difference of the frequency of power grid and frequency difference is equal to the frequency to simultaneously motor；When power grid frequency with
The difference of frequency difference be less than when and motor frequency when, speed regulation device reduce to and motor revolving speed, until power grid frequency and frequency
The difference of difference is equal to the frequency to simultaneously motor.Frequency difference is determined by grid-connected slippage, is preset definite value.
Aforesaid operations carry out closed loop adjusting by speed regulation device, and regulative mode can use " proportional-integral-differential " (PID)
Algorithm carries out, to save the time of simultaneous interconnecting.Wherein, speed regulation device can be the governor (hydraulic turbine direction to simultaneously motor
It is grid-connected) or the governor of static frequency changer (static frequency changer driving style is grid-connected) or opposite side unit (water pump direction is back-to-back
Starting mode is grid-connected).
In one embodiment, the second grid-connected conditions are as follows: │ VG/FG-KI│<σ；
Wherein, VGFor the voltage effective value of power grid, FGFor the frequency of power grid, K is proportionality coefficient, and I is exciting current, and σ is pre-
If value.
S202 is specifically included: working as VG/FGWhen-KI > σ, excitation regulation device increases the exciting current to simultaneously motor, until │
VG/FG-KI│<σ；Work as VG/FGWhen-KI <-σ, excitation regulation device reduces the exciting current to simultaneously motor, until │ VG/FG-KI│<
σ。
Wherein, KI=VU/FU, VUFor the voltage effective value to simultaneously motor, FUFor the frequency to simultaneously motor.Aforesaid operations can
To be carried out using " proportional-integral-differential " (PID) algorithm, the tracking target of algorithm is the virtual value and frequency of network voltage
Ratio, adjusting poor dead zone is σ.
Wherein, speed regulation device and excitation regulation device while adjustment parameter, i.e. S101 to S102 and S201 to S202 are simultaneously
Capable.
When it is implemented, synchronization device calculates when the difference of the frequency of power grid and frequency difference is equal to when the simultaneously frequency of motor
Obtained frequency difference (frequency of power grid and the difference to the simultaneously frequency of motor) meets the first grid-connected requirement；As │ VG/FGWhen-KI │ < σ,
The pressure difference (voltage effective value of power grid and the difference to the simultaneously voltage effective value of motor) that synchronization device is calculated meets second
Grid-connected requirement.Grid-connected (while the first grid-connected conditions of satisfaction and second grid-connected are required with second when meeting the first grid-connected requirement simultaneously
Condition) when, power grid meets the grid-connected requirement of third with the angular difference to simultaneously motor, and synchronization device output breaker closing is instructed to open circuit
Device, breaker closing.
In addition, moving to closing position from synchronization device output breaker closing instruction (closing pulse) to contact of breaker
Need after a period of time, due to this time difference presence, synchronization device needs issue closing pulse before the moment same period, claim this
One time difference was the leading time of synchronization device.Leading time depends on breaker intrinsic mechanical action delay (the dynamic touching of breaker
Head is passed by the total travel time experienced), breaker auxiliary relay actuation time and synchronization device relay output movement
Time.That is, synchronization device output breaker closing instruction, after by leading time, breaker closing.
The process of embodiment of the present invention is as follows:
1, frequency of the speed regulation device measurement to simultaneously motor；When the frequency of power grid and the difference of frequency difference are greater than the frequency to simultaneously motor
When rate, speed regulation device increase to and motor revolving speed, when the difference of the frequency of power grid and frequency difference be less than when and motor frequency when,
Speed regulation device reduces the revolving speed to simultaneously motor, until the difference of the frequency of power grid and frequency difference is equal to the frequency to simultaneously motor.
2, simultaneously, exciting current of the excitation regulation device measurement to simultaneously motor；Work as VG/FGWhen-KI > σ, excitation regulation device
Increase the exciting current to simultaneously motor, works as VG/FGWhen-KI <-σ, excitation regulation device reduces the exciting current to simultaneously motor, until
│VG/FG-KI│<σ。
3, when the difference of the frequency of power grid and frequency difference is equal to the frequency difference that when the simultaneously frequency of motor, synchronization device is calculated
Meet the first grid-connected requirement；As │ VG/FGWhen-KI │ < σ, the pressure difference that synchronization device is calculated meets the second grid-connected requirement, at this time
Synchronization device output breaker closing is instructed to breaker, after by leading time, breaker closing.
To sum up, the simultaneous interconnecting method of the embodiment of the present invention has the beneficial effect that:
1, existing synchronization device is that (second grade) is treated at regular intervals and the voltage of power grid is adjusted, and causes to adjust
Slowly, and synchronization device adjustment of field excitation is freed from synchronization device and is placed in excitation regulation device by the present invention, using tracking
The mode of the ratio of the frequency of the voltage effective value and power grid of power grid realizes that closed loop is adjusted, so that the more rapid (milli of adjustment process
Second grade), avoid because voltage is low caused by revolving speed is low, cause to and motor excitation overregulate；Voltage caused by avoiding because of revolving speed height
Height causes to simultaneously electric moter voltage less stress section；And the frequent adjusting that voltage magnitude caused by avoiding because of rotation speed change changes, greatly
The degree of regulation that the simultaneously voltage of power grid is waited for when improving simultaneous interconnecting greatly enables pressure difference control in the reasonable scope.
2, existing synchronization device is that (second grade) is treated at regular intervals and the frequency of power grid is adjusted, and causes to adjust slow
Slowly, and the adjusting of synchronization device frequency is freed from synchronization device and is transferred to speed regulation device by the present invention, using the specified frequency of tracking
Rate function, so that adjustment process more rapidly (Millisecond), waits for when greatly improving simultaneous interconnecting and the adjusting of the frequency of power grid
Precision, so as to which simultaneously difference is given frequency difference between the frequency and mains frequency of motor.
3, the function of synchronization device is greatly simplified.Synchronization device is only used for judging whether to meet grid-connected requirement, and according to leading
The preceding time issues closing pulse, thus grid-connected failure problem caused by avoiding because of synchronization device regulation problem.
Based on the same inventive concept, the embodiment of the invention also provides a kind of simultaneous interconnecting systems, since the system solves
The principle of problem is similar to simultaneous interconnecting method, therefore the implementation of the system may refer to the implementation of method, repeats place no longer
It repeats.
Fig. 2 is the structural block diagram of simultaneous interconnecting system in the embodiment of the present invention.As shown in Fig. 2, simultaneous interconnecting system includes:
Speed regulation device, for measure to and motor frequency, judge to and the frequency of motor whether meet the first grid-connected item
Part；When the frequency of simultaneously motor is unsatisfactory for the first grid-connected conditions, the revolving speed to simultaneously motor is adjusted, until the frequency to simultaneously motor
Meet the first grid-connected conditions；
Excitation regulation device judges whether the exciting current to simultaneously motor is full for measuring the exciting current to simultaneously motor
The second grid-connected conditions of foot；When the exciting current of simultaneously motor is unsatisfactory for the second grid-connected conditions, the excitation electricity to simultaneously motor is adjusted
Stream, until the exciting current to simultaneously motor meets the second grid-connected conditions；
Synchronization device refers to for exporting breaker closing when meeting the first grid-connected conditions and the second grid-connected conditions simultaneously
It enables.
In a kind of wherein embodiment, the first grid-connected conditions are as follows:
The frequency of power grid and the difference of frequency difference are equal to the frequency to simultaneously motor.
In a kind of wherein embodiment, the second grid-connected conditions are as follows:
│VG/FG-KI│<σ；
Wherein, VGFor the voltage effective value of power grid, FGFor the frequency of power grid, K is proportionality coefficient, and I is exciting current, and σ is pre-
If value.
In a kind of wherein embodiment, speed regulation device is specifically used for:
When the difference of the frequency of power grid and frequency difference is greater than revolving speed when the simultaneously frequency of motor, increased to simultaneously motor；
When the difference of the frequency of power grid and frequency difference is less than revolving speed when the simultaneously frequency of motor, reduced to simultaneously motor.
In a kind of wherein embodiment, excitation regulation device is specifically used for:
Work as VG/FGWhen-KI > σ, increase the exciting current to simultaneously motor；
Work as VG/FGWhen-KI <-σ, reduce the exciting current to simultaneously motor.
To sum up, the simultaneous interconnecting system of the embodiment of the present invention has the beneficial effect that:
1, existing synchronization device is that (second grade) is treated at regular intervals and the voltage of power grid is adjusted, and causes to adjust
Slowly, and synchronization device adjustment of field excitation is freed from synchronization device and is placed in excitation regulation device by the present invention, using tracking
The mode of the ratio of the frequency of the voltage effective value and power grid of power grid realizes that closed loop is adjusted, so that the more rapid (milli of adjustment process
Second grade), avoid because voltage is low caused by revolving speed is low, cause to and motor excitation overregulate；Voltage caused by avoiding because of revolving speed height
Height causes to simultaneously electric moter voltage less stress section；And the frequent adjusting that voltage magnitude caused by avoiding because of rotation speed change changes, greatly
The degree of regulation that the simultaneously voltage of power grid is waited for when improving simultaneous interconnecting greatly enables pressure difference control in the reasonable scope.
2, existing synchronization device is that (second grade) is treated at regular intervals and the frequency of power grid is adjusted, and causes to adjust slow
Slowly, and the adjusting of synchronization device frequency is freed from synchronization device and is transferred to speed regulation device by the present invention, using the specified frequency of tracking
Rate function, so that adjustment process more rapidly (Millisecond), waits for when greatly improving simultaneous interconnecting and the adjusting of the frequency of power grid
Precision, so as to which simultaneously difference is given frequency difference between the frequency and mains frequency of motor.
3, the function of synchronization device is greatly simplified.Synchronization device is only used for judging whether to meet grid-connected requirement, and according to leading
The preceding time issues closing pulse, thus grid-connected failure problem caused by avoiding because of synchronization device regulation problem.
Particular embodiments described above has carried out further in detail the purpose of the present invention, technical scheme and beneficial effects
Describe in detail it is bright, it should be understood that the above is only a specific embodiment of the present invention, the guarantor being not intended to limit the present invention
Range is protected, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in this
Within the protection scope of invention.
Claims (10)
1. a kind of simultaneous interconnecting method characterized by comprising
Whether frequency of the speed regulation device measurement to simultaneously motor, the judgement frequency to simultaneously motor meet the first grid-connected conditions；
When described when the frequency of simultaneously motor is unsatisfactory for first grid-connected conditions, the speed regulation device adjustment turns to simultaneously motor
Speed, until the frequency to simultaneously motor meets first grid-connected conditions；
Whether exciting current of the excitation regulation device measurement to simultaneously motor, the judgement exciting current to simultaneously motor meet second
Grid-connected conditions；
When described when the exciting current of simultaneously motor is unsatisfactory for second grid-connected conditions, the excitation regulation device adjustment is to simultaneously
The exciting current of motor, until the exciting current to simultaneously motor meets second grid-connected conditions；
When meeting the first grid-connected conditions and the second grid-connected conditions simultaneously, the synchronization device output breaker closing instruction.
2. simultaneous interconnecting method according to claim 1, which is characterized in that first grid-connected conditions are as follows:
The frequency of power grid and the difference of frequency difference are equal to the frequency to simultaneously motor.
3. simultaneous interconnecting method according to claim 1, which is characterized in that second grid-connected conditions are as follows:
│VG/FG-KI│<σ；
Wherein, VGFor the voltage effective value of power grid, FGFor the frequency of power grid, K is proportionality coefficient, and I is exciting current, and σ is default
Value.
4. simultaneous interconnecting method according to claim 2, which is characterized in that the speed regulation device adjustment turns to simultaneously motor
Speed, comprising:
When the difference of the frequency of power grid and the frequency difference be greater than it is described when and motor frequency when, described in the speed regulation device increases
Revolving speed to simultaneously motor；
When the difference of the frequency of power grid and the frequency difference be less than it is described when and motor frequency when, described in the speed regulation device reduces
Revolving speed to simultaneously motor.
5. simultaneous interconnecting method according to claim 3, which is characterized in that the excitation regulation device adjustment is to simultaneously motor
Exciting current, comprising:
Work as VG/FGWhen-KI > σ, the excitation regulation device increases the exciting current to simultaneously motor；
Work as VG/FGWhen-KI <-σ, the excitation regulation device reduces the exciting current to simultaneously motor.
6. a kind of simultaneous interconnecting system characterized by comprising
Speed regulation device, for measuring the frequency to simultaneously motor, whether the judgement frequency to simultaneously motor meets the first grid-connected item
Part；When it is described when and the frequency of motor be unsatisfactory for first grid-connected conditions when, adjust to and motor revolving speed, until it is described to
And the frequency of motor meets first grid-connected conditions；
Excitation regulation device, for measuring the exciting current to simultaneously motor, whether the judgement exciting current to simultaneously motor is full
The second grid-connected conditions of foot；When described when the exciting current of simultaneously motor is unsatisfactory for second grid-connected conditions, adjustment is to simultaneously motor
Exciting current, until it is described to and the exciting current of motor meet second grid-connected conditions；
Synchronization device, for the output breaker closing instruction when meeting the first grid-connected conditions and the second grid-connected conditions simultaneously.
7. simultaneous interconnecting system according to claim 6, which is characterized in that first grid-connected conditions are as follows:
The frequency of power grid and the difference of frequency difference are equal to the frequency to simultaneously motor.
8. simultaneous interconnecting system according to claim 6, which is characterized in that second grid-connected conditions are as follows:
│VG/FG-KI│<σ；
Wherein, VGFor the voltage effective value of power grid, FGFor the frequency of power grid, K is proportionality coefficient, and I is exciting current, and σ is default
Value.
9. simultaneous interconnecting system according to claim 7, which is characterized in that the speed regulation device is specifically used for:
When the difference of the frequency of power grid and the frequency difference be greater than it is described when and motor frequency when, increase it is described to and motor turn
Speed；
When the difference of the frequency of power grid and the frequency difference be less than it is described when and motor frequency when, reduce it is described to and motor turn
Speed.
10. simultaneous interconnecting system according to claim 8, which is characterized in that the excitation regulation device is specifically used for:
Work as VG/FGWhen-KI > σ, increase the exciting current to simultaneously motor；
Work as VG/FGWhen-KI <-σ, reduce the exciting current to simultaneously motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810839745.5A CN108964138B (en) | 2018-07-27 | 2018-07-27 | Synchronous grid connection method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810839745.5A CN108964138B (en) | 2018-07-27 | 2018-07-27 | Synchronous grid connection method and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108964138A true CN108964138A (en) | 2018-12-07 |
| CN108964138B CN108964138B (en) | 2020-12-08 |
Family
ID=64465077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810839745.5A Active CN108964138B (en) | 2018-07-27 | 2018-07-27 | Synchronous grid connection method and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108964138B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110429660A (en) * | 2019-07-19 | 2019-11-08 | 国家电网有限公司 | A kind of generator connecting in parallel with system asynchronous switch-on pulse issues the determination method of time |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101645607A (en) * | 2009-09-14 | 2010-02-10 | 华北电力大学（保定） | Quick ideal condition quasi-synchronization paralleling method of hydro-generator |
| CN102522773A (en) * | 2011-12-14 | 2012-06-27 | 上海信元瑞电气有限公司 | Generating set control system used for power system dynamic simulation experiment |
| CN204103509U (en) * | 2014-09-11 | 2015-01-14 | 郑程遥 | A kind of generator connecting in parallel with system automatic sub-synchronous device |
| CN104881317A (en) * | 2015-06-18 | 2015-09-02 | 山东泰山抽水蓄能电站有限责任公司 | Corresponding-period grid-connection simulation platform and simulation system of pumped power storage unit under different working conditions |
| US20170194793A1 (en) * | 2015-12-30 | 2017-07-06 | Sungrow Power Supply Co., Ltd. | Grid-connected control method based on virtual synchronizer and device thereof |
-
2018
- 2018-07-27 CN CN201810839745.5A patent/CN108964138B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101645607A (en) * | 2009-09-14 | 2010-02-10 | 华北电力大学（保定） | Quick ideal condition quasi-synchronization paralleling method of hydro-generator |
| CN102522773A (en) * | 2011-12-14 | 2012-06-27 | 上海信元瑞电气有限公司 | Generating set control system used for power system dynamic simulation experiment |
| CN204103509U (en) * | 2014-09-11 | 2015-01-14 | 郑程遥 | A kind of generator connecting in parallel with system automatic sub-synchronous device |
| CN104881317A (en) * | 2015-06-18 | 2015-09-02 | 山东泰山抽水蓄能电站有限责任公司 | Corresponding-period grid-connection simulation platform and simulation system of pumped power storage unit under different working conditions |
| US20170194793A1 (en) * | 2015-12-30 | 2017-07-06 | Sungrow Power Supply Co., Ltd. | Grid-connected control method based on virtual synchronizer and device thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110429660A (en) * | 2019-07-19 | 2019-11-08 | 国家电网有限公司 | A kind of generator connecting in parallel with system asynchronous switch-on pulse issues the determination method of time |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108964138B (en) | 2020-12-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2824202C (en) | Voltage control for wind turbine generators | |
| US10352301B2 (en) | Method for operating a wind power plant in a weak grid environment and a wind power plant | |
| AU2013292247B2 (en) | Method for controlling a wind farm | |
| EP2859638B1 (en) | Wind-power-plant control upon low-voltage grid faults | |
| AU2004208656B2 (en) | Voltage control for wind generators | |
| DK178459B1 (en) | System og fremgangsmåde til spændingsstyring af vindgeneratorer | |
| EP3075052B1 (en) | A wind power plant with improved rise time | |
| US20100109325A1 (en) | Method and device for power regulation of an underwater power plant | |
| CN108695897B (en) | Power control method, device, controller, system and medium for photovoltaic power station | |
| CN104074679A (en) | All-wind-speed limited-power optimal control method for variable-speed and variable-pitch wind generation set | |
| CN101793229A (en) | Reducing of motor load in the wind-powered electricity generation unit | |
| Jalali et al. | Frequency regulation and AGC in isolated systems with DFIG-based wind turbines | |
| CN104329225A (en) | Wind power generator set power control method | |
| CN108964138A (en) | Simultaneous interconnecting method and system | |
| AU2019220327B2 (en) | Control method for a hydraulic unit | |
| CN107276105A (en) | A kind of hydroelectric units primary frequency modulation method based on dynamic dead zone | |
| CN107939590B (en) | Control method for generating power according to water level | |
| CN113586335A (en) | Wind driven generator overspeed prevention group control method and system for large turbulence working condition | |
| CN106528978B (en) | Dynamic simulation method and system for speed regulation system of advanced pressurized water reactor nuclear motor unit | |
| CN102953930A (en) | Method for operating a wind power assembly when a power failure occurs with a decrease in power and such a wind power assembly | |
| CN103236715A (en) | Regulating method for speed regulator mechanical open limit of generation set | |
| CN106340967A (en) | Smart operation apparatus and smart operation method of low-voltage generator of hydropower station | |
| CN103475291A (en) | Whole-process excitation control method of transient process of power generator in power system | |
| US11114863B2 (en) | Method for starting a hydraulic turbine | |
| JP2004320874A (en) | Power generation system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |