CN102255594A - Main and auxiliary link cooperative control method for generator excitation system - Google Patents
Main and auxiliary link cooperative control method for generator excitation system Download PDFInfo
- Publication number
- CN102255594A CN102255594A CN 201110224390 CN201110224390A CN102255594A CN 102255594 A CN102255594 A CN 102255594A CN 201110224390 CN201110224390 CN 201110224390 CN 201110224390 A CN201110224390 A CN 201110224390A CN 102255594 A CN102255594 A CN 102255594A
- Authority
- CN
- China
- Prior art keywords
- generator
- pss
- limiter
- restriction
- control method
- 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.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/10—Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The invention discloses a main and auxiliary link cooperative control method for a generator excitation system. Auxiliary link cooperative control is realized by the steps of PSS (power system stabilizer) control, underexcitation limit, overexcitation limit, rotor current limit, stator current limit, V/F (voltage) limit, maximum exciting current limit and regulation difference control. The main and auxiliary link cooperative control method is characterized by comprising the following steps that: 1, when a negative regulation difference compensation is adopted on a generator and transformer overexcitation magnetic curve, a regulation difference coefficient is not less than minus 2 percent; 2, a small-scale hydroelectric unit without a PSS controller is additionally provided with the PSS controller and a positive regulation difference is adopted to carry out setting on a V/F limiter; and 3, the V/F limiter adopts inverse timedelay operation under the condition of large perturbation, a phase shift of the V/F limiter in the range of 0.1-0.2Hz needs to be unobvious and cannot influence a PSS near the local oscillating frequency under the condition of small perturbation. Due to the adoption of the main and auxiliary link cooperative control method for the generator excitation system, not only is the problem of rapidness of excitation control under the condition of large perturbation solved, but also the stability in a stable state is ensured.
Description
Technical field
The present invention relates to the major control function main ring of generator excited system and the control method for coordinating between secondary ring, secondary ring and secondary ring, belong to power system excitation control technology field.
Background technology
Continuous expansion along with the electric power system scale, stabilization of power grids problem is more and more outstanding, the fail safe of operation of power networks more and more attracts much attention, dispatching of power netwoks has proposed more and more higher requirement for excitation system, and progressively electrical network is brought into the category of administration of power networks to the requirement of excitation system, generator excited system no longer only has been the excitation in power plant, the excitation of electric power system especially.Excitation system not only needs to guarantee the safe and stable operation of power plant, also to provide support the stable of electrical network, control performance demands in the time of not only will considering electrical network microvariations situation, more need to consider the requirement of the rapidity controlled when electrical network takes place such as big disturbance situation such as short circuit and stability, the rapidity of regulating when excitation system not only needs to have electric network fault causes big disturbance for this reason will have the stability of regulating when the network load change causes microvariations simultaneously.And when big disturbance takes place in electrical network, be not only excitation system main ring in action, also usually be accompanied by the effect of various assist control links.
In exciter control system; keep generator terminal voltage except having, realize the reasonable distribution of the reactive power between different generating sets and the transient state of generating set be provided and function such as static stability, also should play the certain protection effect to generator.This just requires excitation system to have the main ring that plays a role in normal control; also must comprise many limiting protectings and suppress the various various assist control links that may vibrate for improving the electrical network dynamic stability, as PSS, SEDC, underexcitation restriction, cross encourage restriction, stator current restriction, V/F restriction, the restriction of maximum exciting current, minimum excitation short circuit restriction, transfer poor etc.These restrictions are more or less all played a role to the control performance of main ring, thereby have influence on the stabilization of power grids.Because present international standard IEEE std 421, particularly among the GB GB/T 7409.2 in the excitation system controlling models between auxiliary link and master control link existing employing stacked system the height door mode of adopting arranged again, when adopting the limiter of height door form, only need consider the selection of main and auxiliary ring model and parameter respectively, and when adopting the excitation system model of stacked system, then not only to consider the model of main and auxiliary ring and the selection of parameter respectively, also must consider coordination control therebetween.Because often there is bigger disturbance in the excitation system that adopts height door mode in limit movement and the handoff procedure that withdraws from, so excitation system adopts the model of stacked system more at present.
Summary of the invention
The present invention wants the technical solution problem to be: to keep set end voltage by main ring control stable for generator excitation system when normally moving; Under big disturbance or failure condition, particularly adopt in the excitation system model of stacked system, assist control links such as various stable, restrictions, protection start rapidly, and with the main ring acting in conjunction, the effect of coordinating control could play a crucial role to the stabilization of power grids.
In order to solve above technical problem, the invention provides the main and auxiliary ring control method for coordinating of a kind of generator excited system, described secondary ring is coordinated control and is comprised PSS control, underexcitation restriction, crosses and encourage restriction, rotor current restriction, stator current restriction, V/F restriction, the restriction of maximum exciting current, transfer poor control, it is characterized in that, may further comprise the steps:
Difference coefficient should be not less than-2% when 1) generator, transformer overexcitation curve adopted negative accent difference to compensate;
2) for the small-sized Hydropower Unit of not installing the PSS controller, install the PSS controller additional, the V/F limiter adjust adopt just transferring poor;
3) the V/F limiter adopts inverse time-delay operation under big disturbance, can long-play under low V/F ratio and do not influence the original characteristic of system; Under microvariations, be primarily aimed at ultra-low frequency oscillation, need make the phase shift of V/F limiter between 0.1-0.2Hz not bring negative damping, thereby not influence PSS to system.
Aforesaid generator excited system master, the secondary ring control method for coordinating, it is characterized in that: coordinate control between described overexciation limiter and the maximum exciting current limiter: when maximum exciting current restriction that generator rotor current reaches that excitation system is provided with, the instantaneous maximum exciting current limiter action of generator excited system, the rotor current of generator is restricted to the mistake that generator excited system sets encourages the exciting current permissible value, and keep time enough according to the needs of electrical network, served as and encouraged after time that limiter allows reaches, if electric network fault is not still eliminated, then generator excited system is restricted to the long-time running current value that generator amature allows with generator rotor current.
Aforesaid generator excited system master, the secondary ring control method for coordinating, it is characterized in that: the control method for coordinating between described underexcitation limiter and the PSS controller is: prevent that by underexcitation restriction the exciting current that causes because of the generator excitation deficiency is low, thereby advance the phase degree of depth and enter the irregular operation zone greatly, when the active power low-frequency oscillation takes place owing to damping is more weak in system, the PSS controller makes its phase lag through excitation system and generator field winding produce a positive damping torque at the generating pusher side by the signal that is ahead of rotating speed in phase place of voltage regulator input adding, thereby inhibition low-frequency oscillation, when underexcitation limit movement, not only idle link can be vibrated, gain merit and to vibrate too, when underexcitation limiter of configuration and PSS parameter, carry out cooperation according to actual engineering situation, the degree of depth that makes excitation controller both limit generator is apace advanced phase, can suppress the low-frequency oscillation of generator active power simultaneously again effectively.
The invention provides the main and auxiliary ring control method for coordinating of a kind of generator excited system, the preset parameter control method of abandoning tradition, adopt the means of variable element, both guaranteed that each auxiliary link of excitation system all had extraordinary dynamic adjustments characteristic, again can close fit, efficiently solve under the big disturbance situation of electric power system the contradiction between the excitation control stability under the excitation regulation rapidity and power system mesomeric state situation, satisfy under the various operating modes of electric power system stable demand.
Description of drawings
Fig. 1 coordinates the control block diagram for excitation system;
Idle and merit angle when Fig. 2 controls for adopting preset parameter under the big disturbance changes;
Fig. 3 is that the idle and merit angle under the big disturbance changes when adopting the self adaptation VARIABLE PARAMETER PID CONTROL;
Fig. 4 is the idle and meritorious variation under PSS does not drop into when descending step;
Fig. 5 is the idle and meritorious variation under PSS drops into when descending step;
Fig. 6 is V/F restriction and meritorious variation during step on the set end voltage.
Embodiment
Secondary ring is coordinated control and is comprised PSS control, SEDC control, underexcitation restriction, crosses and encourage that restriction, rotor current restriction, stator current restriction, V/F restriction, the restriction of maximum exciting current, minimum excitation short circuit restriction, accent are poor to be controlled etc.
In traditional control method, if the improper V/F output of PSS parameter tuning may cause or aggravate low-frequency oscillation with PSS output stack.The present invention is proposing aspect model standardization, engineering application and the parameter tuning:
For V/F in normal system voltage range output does not influence excitation regulation and PSS output, generator, the curve fitting of transformer overexcitation must be correct, adopt negative when transferring the difference compensation difference coefficient should be not less than-2%;
For the small-sized Hydropower Unit of not installing PSS, operate in line end, the working voltage scope is bigger, cause low-frequency oscillation because of excitation control unreasonable allocation easily, this phenomenon is more obvious in the small power station concentrated area, need install PSS additional to such situation, V/F adjusts too not conservative, and adopt just transferring poor;
The V/F limiter uses at large-scale unit should take into account the different ruuning situations with microvariations of big disturbance.The V/F limiter mainly stops the idle shortage of system that the over-excitation protection action causes under big disturbance, causes spread of voltage.Therefore cross heating and V/F ratio relation in direct ratio that magnetic flux causes, adopt inverse time-delay operation, can long-play under low V/F ratio and do not influence the original characteristic of system.Under microvariations, be primarily aimed at ultra-low frequency oscillation, make the output of V/F limiter not influence PSS and promptly not bring negative damping, require the phase shift of V/F limiter between 0.1-0.2Hz not obvious, near local oscillation frequency, do not influence PSS substantially to system.
Crossing the coordination control of encouraging between restriction and the maximum exciting current limiter is meant: when electrical network needs generator excited system to encourage by force, as long as the anode voltage of silicon controlled rectifier is enough high, then the rotor current of generator may can surpass the maximum current of encouraging the restriction permission by force very soon, thereby reaches the maximum exciting current that generator allows in short-term.When maximum exciting current restriction that generator rotor current reaches that excitation system is provided with, the instantaneous maximum exciting current limiter action of generator excited system, the rotor current of generator is restricted to the mistake that generator excited system sets encourages the exciting current permissible value, and keep time enough according to the needs of electrical network.Served as and encouraged after time that restriction allows reaches, if electric network fault is not still eliminated, then generator excited system is restricted to the long-time running current value that generator amature allows with generator rotor current.
Core of the present invention is the control method for coordinating between main ring and secondary ring, secondary ring and secondary ring, the difficult problem of the stability in the time of guaranteeing stable state again excitation control rapidity the time when having solved big disturbance.Under big disturbance situation, the generator's power and angle stability margin can increase by 3.
To keep set end voltage by main ring control stable for generator excitation system during normal operation; Under big disturbance or failure condition, assist control links such as various stable, the restrictions of excitation system, protection start rapidly, and with the main ring acting in conjunction, its effect of coordinating control plays a crucial role to the stable of electrical network.
This patent carries out deep research to each auxiliary link of excitation system, set up the coordination control strategy between rational main ring and secondary ring, secondary ring and secondary ring, adopt the means of variable element, both guaranteed that each auxiliary link of excitation system all had extraordinary dynamic adjustments characteristic, again can close fit, efficiently solve under the big disturbance situation of electric power system the contradiction between the excitation control stability under the excitation regulation rapidity and power system mesomeric state situation, satisfied under the various operating modes of electric power system stable demand.
Encourage in the limitation function low, adopt the traditional preset parameter control and the method for self adaptation VARIABLE PARAMETER PID CONTROL under the big disturbance respectively, Fig. 2, Fig. 3 test the regulating effect comparison diagram for both.As can be seen from the figure, compare with preset parameter control, the governing speed of self adaptation VARIABLE PARAMETER PID CONTROL is obviously accelerated, and the adjusting time (the idle limits value that returns to) shortens to 1.5s by 4.5s.The merit angular oscillatory motion amplitude of generator reduces about 4 degree, and the angle stability allowance of generator significantly increases.
Cause low test of encouraging limit movement by step under the generator terminal voltage, checking power system stabilizer, PSS (PSS) is encouraged restriction and is coordinated control with low.When Fig. 4 is underexcitation limit movement, when the waveform when PSS does not drop into, Fig. 5 are underexcitation limit movement, the waveform when PSS does not drop into.By contrast as can be seen, the PSS that this patent adopted encourages restriction and coordinates control with low, low when encouraging limit movement not because the input of PSS causes restriction obviously to weaken, limited the degree of depth of generator apace and advanced phase; Same PSS also not because lowly encourage the effect of restriction and lose it the effect that improves the generator positive damping should be arranged, has suppressed the low-frequency oscillation of generator active power effectively.
Cause the test of V/F limit movement by step on the generator terminal voltage, checking PSS coordinates to control with the restriction of V/F.Fig. 6 is V/F restriction and PSS coordination control waveform, as can be seen from the figure, exciting voltage carries out the transition to plateau in 3s, the number of oscillation is controlled at 3～5 times, drops into exciting voltage fluctuation that causes and the problem that is difficult for calming down because of PSS when V/F that this patent adopted restriction and PSS coordinate control and solved in the general excitation system V/F limit movement well.
Above-mentioned embodiment does not limit technical scheme of the present invention in any form, and the technical scheme that mode obtained that every employing is equal to replacement or equivalent transformation all drops on protection scope of the present invention.
Claims (3)
1. main and auxiliary ring control method for coordinating of generator excited system, described secondary ring is coordinated control and is comprised PSS control, underexcitation restriction, crosses and encourage restriction, rotor current restriction, stator current restriction, V/F restriction, the restriction of maximum exciting current, transfer poor control, it is characterized in that, may further comprise the steps:
Difference coefficient was not less than-2% when 1) generator, transformer overexcitation curve adopted negative accent difference to compensate;
2) for the small-sized Hydropower Unit of not installing the PSS controller, install the PSS controller additional, the V/F limiter adjust adopt just transferring poor;
3) the V/F limiter adopts inverse time-delay operation under big disturbance, can long-play under low V/F ratio and do not influence the original characteristic of system; Under microvariations, for ultra-low frequency oscillation, make the phase shift of V/F limiter between 0.1-0.2Hz not bring negative damping to excitation system, do not influence PSS.
2. generator excited system master according to claim 1, the secondary ring control method for coordinating, it is characterized in that: coordinating control procedure between overexciation limiter and the maximum exciting current limiter is: when maximum exciting current restriction that generator rotor current reaches that excitation system is provided with, the instantaneous maximum exciting current limiter action of generator excited system, the rotor current of generator is restricted to the mistake that generator excited system sets encourages the exciting current permissible value, and keep time enough according to the needs of electrical network, served as and encouraged after time that limiter allows reaches, if electric network fault is not still eliminated, then generator excited system is restricted to the long-time running current value that generator amature allows with generator rotor current.
3. generator excited system master according to claim 1, the secondary ring control method for coordinating, it is characterized in that: the control method for coordinating between underexcitation limiter and the PSS controller is: prevent that by underexcitation restriction the exciting current that causes because of the generator excitation deficiency is low, thereby advance the phase degree of depth and enter the irregular operation zone greatly, when the active power low-frequency oscillation takes place owing to damping is more weak in system, the PSS controller makes its phase lag through excitation system and generator field winding produce a positive damping torque at the generating pusher side by the signal that is ahead of rotating speed in phase place of voltage regulator input adding, thereby inhibition low-frequency oscillation, when underexcitation limit movement, not only idle link can be vibrated, gain merit and to vibrate too, when underexcitation limiter of configuration and PSS parameter, carry out cooperation according to actual engineering situation, the degree of depth that makes excitation controller both limit generator is apace advanced phase, can suppress the low-frequency oscillation of generator active power simultaneously again effectively.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110224390 CN102255594A (en) | 2011-08-05 | 2011-08-05 | Main and auxiliary link cooperative control method for generator excitation system |
| PCT/CN2012/079629 WO2013020482A2 (en) | 2011-08-05 | 2012-08-03 | Coordination and control method for main and secondary parts of generator excitation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110224390 CN102255594A (en) | 2011-08-05 | 2011-08-05 | Main and auxiliary link cooperative control method for generator excitation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102255594A true CN102255594A (en) | 2011-11-23 |
Family
ID=44982610
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110224390 Pending CN102255594A (en) | 2011-08-05 | 2011-08-05 | Main and auxiliary link cooperative control method for generator excitation system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102255594A (en) |
| WO (1) | WO2013020482A2 (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102593839A (en) * | 2012-02-22 | 2012-07-18 | 吉林省电力有限公司 | Difference adjustment coefficient setting method of generator excitation system considering all operating manners of power grid |
| CN103401497A (en) * | 2013-07-10 | 2013-11-20 | 国家电网公司 | Method for adjusting excitation additional reactive current compensation coefficients based on improvement on unit angle stability |
| CN103516278A (en) * | 2013-09-26 | 2014-01-15 | 国家电网公司 | Excitation system full-function-performance simulation system based on MATLAB |
| WO2014026314A1 (en) * | 2012-08-13 | 2014-02-20 | 国电南瑞科技股份有限公司 | Method for coordinating and controlling primary ring and auxiliary ring of generator excited system |
| CN104428989A (en) * | 2012-09-19 | 2015-03-18 | 三菱电机株式会社 | Field-winding rotating electrical machine |
| CN104821757A (en) * | 2015-04-10 | 2015-08-05 | 国电南瑞科技股份有限公司 | Synchronous motor excitation system control method based on real-time state internal potential control |
| CN105762817A (en) * | 2016-05-06 | 2016-07-13 | 国电南瑞科技股份有限公司 | PSS4B amplification time setting method of multi-band power system stabilizer |
| CN107834922A (en) * | 2017-11-08 | 2018-03-23 | 华北电力科学研究院有限责任公司 | A kind of condition control method and device of the limitation of field regulator stator current |
| CN108199350A (en) * | 2017-11-27 | 2018-06-22 | 上海电气电站设备有限公司 | A kind of generator overexcitation limits guard method |
| CN109088443A (en) * | 2018-08-13 | 2018-12-25 | 华北电力科学研究院有限责任公司 | The mistake of field regulator encourages limitation optimization method and system |
| CN110932626A (en) * | 2019-12-05 | 2020-03-27 | 国网冀北电力有限公司电力科学研究院 | Auxiliary limit control method and device for AC excitation system of variable speed pumped-storage unit |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105098789B (en) * | 2015-09-23 | 2017-10-31 | 广东电网有限责任公司电力科学研究院 | Excitation system adjusts poor setting method, system and PSS coordination approach and system |
-
2011
- 2011-08-05 CN CN 201110224390 patent/CN102255594A/en active Pending
-
2012
- 2012-08-03 WO PCT/CN2012/079629 patent/WO2013020482A2/en active Application Filing
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102593839A (en) * | 2012-02-22 | 2012-07-18 | 吉林省电力有限公司 | Difference adjustment coefficient setting method of generator excitation system considering all operating manners of power grid |
| CN102593839B (en) * | 2012-02-22 | 2013-12-18 | 吉林省电力有限公司 | Difference adjustment coefficient setting method of generator excitation system considering all operating manners of power grid |
| WO2014026314A1 (en) * | 2012-08-13 | 2014-02-20 | 国电南瑞科技股份有限公司 | Method for coordinating and controlling primary ring and auxiliary ring of generator excited system |
| CN104428989B (en) * | 2012-09-19 | 2017-06-23 | 三菱电机株式会社 | Field winding type rotary electric machine |
| CN104428989A (en) * | 2012-09-19 | 2015-03-18 | 三菱电机株式会社 | Field-winding rotating electrical machine |
| CN103401497A (en) * | 2013-07-10 | 2013-11-20 | 国家电网公司 | Method for adjusting excitation additional reactive current compensation coefficients based on improvement on unit angle stability |
| CN103401497B (en) * | 2013-07-10 | 2016-07-06 | 国家电网公司 | Based on the excitation additional difference coefficient setting method improving unit power-angle stability |
| CN103516278B (en) * | 2013-09-26 | 2016-09-07 | 国家电网公司 | Excitation system full-function-perforsimulation simulation system based on MATLAB |
| CN103516278A (en) * | 2013-09-26 | 2014-01-15 | 国家电网公司 | Excitation system full-function-performance simulation system based on MATLAB |
| WO2016161783A1 (en) * | 2015-04-10 | 2016-10-13 | 国电南瑞科技股份有限公司 | Synchronous-motor excitation-system control method based on electric potential control in real-time status |
| CN104821757B (en) * | 2015-04-10 | 2017-02-08 | 国电南瑞科技股份有限公司 | Synchronous motor excitation system control method based on real-time state internal potential control |
| CN104821757A (en) * | 2015-04-10 | 2015-08-05 | 国电南瑞科技股份有限公司 | Synchronous motor excitation system control method based on real-time state internal potential control |
| CN105762817A (en) * | 2016-05-06 | 2016-07-13 | 国电南瑞科技股份有限公司 | PSS4B amplification time setting method of multi-band power system stabilizer |
| CN105762817B (en) * | 2016-05-06 | 2018-04-20 | 国电南瑞科技股份有限公司 | A kind of multiband power system stabilizer 4B amplification factor setting methods |
| CN107834922A (en) * | 2017-11-08 | 2018-03-23 | 华北电力科学研究院有限责任公司 | A kind of condition control method and device of the limitation of field regulator stator current |
| CN108199350A (en) * | 2017-11-27 | 2018-06-22 | 上海电气电站设备有限公司 | A kind of generator overexcitation limits guard method |
| CN109088443A (en) * | 2018-08-13 | 2018-12-25 | 华北电力科学研究院有限责任公司 | The mistake of field regulator encourages limitation optimization method and system |
| CN110932626A (en) * | 2019-12-05 | 2020-03-27 | 国网冀北电力有限公司电力科学研究院 | Auxiliary limit control method and device for AC excitation system of variable speed pumped-storage unit |
| CN110932626B (en) * | 2019-12-05 | 2021-06-18 | 国网冀北电力有限公司电力科学研究院 | Auxiliary limit control method and device for AC excitation system of variable speed pumped-storage unit |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2013020482A2 (en) | 2013-02-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102255594A (en) | Main and auxiliary link cooperative control method for generator excitation system | |
| CA3088831C (en) | Method for feeding electrical power into an electrical supply network | |
| Ekanayake et al. | Control of DFIG wind turbines | |
| US8498752B2 (en) | Decoupling controller for power systems | |
| CN103683301B (en) | voltage control system and method for wind-driven generator | |
| CN111837309B (en) | Method of operating an energy generating system and inverter of an energy generating system | |
| US9444391B2 (en) | Protective module and method against torque peaks between a motor and an electric machine | |
| Rodríguez-Amenedo et al. | Black-start capability of DFIG wind turbines through a grid-forming control based on the rotor flux orientation | |
| CN108474349B (en) | Method of adjusting a wind turbine power take off | |
| CN108695897B (en) | Power control method, device, controller, system and medium for photovoltaic power station | |
| CN107732941B (en) | Control method for battery energy storage power source to participate in primary frequency modulation of power grid | |
| CN106788019B (en) | A kind of synchronous generator reactive power, which is crossed, encourages adjusting method | |
| RU2727939C1 (en) | Operating method of wind park | |
| Sebastián | Smooth transition from wind only to wind diesel mode in an autonomous wind diesel system with a battery-based energy storage system | |
| Han et al. | A doubly fed induction generator controlled in single-sided grid connection for wind turbines | |
| CN108134402A (en) | A kind of virtual synchronous generator system and control method applied to photovoltaic plant | |
| CN107706937A (en) | A kind of control method for coordinating of accumulation energy type double-fed fan motor unit | |
| CN202586860U (en) | Compound excitation device with secondary winding | |
| CN111682558B (en) | Control method for fast and constant power of grid-connected tie line of self-contained power plant | |
| US11898540B2 (en) | Method for feeding electrical power into an electrical supply network | |
| Wasynczuk et al. | Voltage and frequency regulation strategies in isolated AC micro-grids | |
| Milosevic et al. | A new technique for improving stability of distributed synchronous generators during temporary faults in a distribution network | |
| Qian et al. | Frequency trajectory planning-based frequency regulation strategy for wind turbines equipped with energy storage system | |
| Karisik et al. | Installation of a Synchronous Condenser-the Kiamal Solar Farm example | |
| CN102957168B (en) | Coordination control method for excitation among different units based on monitoring or distributed control system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20111123 |