CN106026122A - Integrated asynchronous excitation phase modifier and reactive compensation and active balance method thereof - Google Patents
Integrated asynchronous excitation phase modifier and reactive compensation and active balance method thereof Download PDFInfo
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- CN106026122A CN106026122A CN201610474932.9A CN201610474932A CN106026122A CN 106026122 A CN106026122 A CN 106026122A CN 201610474932 A CN201610474932 A CN 201610474932A CN 106026122 A CN106026122 A CN 106026122A
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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
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1885—Arrangements for adjusting, eliminating or compensating reactive power in networks using rotating means, e.g. synchronous generators
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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
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
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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
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
- H02J2003/365—Reducing harmonics or oscillations in HVDC
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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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- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Ac Motors In General (AREA)
- Control Of Eletrric Generators (AREA)
- Control Of Electrical Variables (AREA)
Abstract
The invention discloses an integrated asynchronous excitation phase modifier and a reactive compensation and active balance method thereof. The phase modifier comprises a three-phase AC excitation winding, a voltage source type inverter, a super capacitor and a voltage source type rectifier, wherein the super capacitor is used for providing energy for the voltage source type inverter and maintaining a voltage level of the voltage source type inverter, the voltage source type rectifier is used for absorbing active power from a power grid side, converting AC current of the power grid side into DC current, providing active power for the super capacitor and the voltage source type inverter and transmitting reactive power to a power grid, and the voltage source type inverter is used for inverting the DC current transmitted by the voltage source type rectifier into a three-phase AC excitation current needed by a three-phase rotor excitation winding. According to the phase modifier and the method thereof, through controlling a rotation speed of a rotor, the phase modifier is made to absorb superfluous energy of the power grid when lines are in short circuit fault partially, relatively strong inertia is realized, safety and stability of the power grid are facilitated, and reactive compensation capability and transient performance are better.
Description
Technical field
The present invention relates to the phase modifier in a kind of high voltage power transmisson system, the comprehensive phase modifier of a kind of asynchronous excitation.
Background technology
Along with China's expanding economy, the demand for electric power increases day by day, and the disequilibrium of china natural resources distribution makes long distance powedr transmission become a kind of inevitable.But there is all drawbacks in traditional distance high-voltage AC transmission system, there's almost no in HVDC transmission system, so D.C. high voltage transmission becomes a kind of trend.Although the transmission line of electricity of HVDC transmission system itself will not consume idle, but the current conversion station of D.C. high voltage transmission is owing to using power electronic equipment in a large number, still can consume the most idle.Additionally, a large amount of inputs of D.C. high voltage transmission, also making the built-in inertia of electrical network diminish, Ability of Resisting Disturbance reduces.Therefore, even HVDC transmission system, the problem that there is also reactive-load compensation.
In the power system that China is current, have begun to use static passive compensation device (mainly SVC) progressively and replace tradition phase modifier, be because while that tradition phase modifier capacity is big, dependable performance, but dynamically regulating power is poor, and SVC then can accomplish quickly to respond.It is bigger that STATCOM compares SVC capacity, it is often more important that because have employed full-controlled device IGBT, so dynamically regulating power is higher, response time is shorter.Although currently also have numerous research about static passive compensation device, but almost without the precedent joining together to come into operation by phase modifier and more advanced both STATCOM.
Summary of the invention
The technical problem to be solved in the present invention is for above-mentioned the deficiencies in the prior art, and provides a kind of comprehensive phase modifier of asynchronous excitation, and this comprehensive phase modifier of asynchronous excitation has higher reactive-load compensation, active balance ability and dynamic regulating power.
For solving above-mentioned technical problem, the technical solution used in the present invention is:
The comprehensive phase modifier of a kind of asynchronous excitation, including three-phase AC excitation winding, voltage source inverter, super capacitor and voltage-source type commutator.
Three-phase AC excitation winding includes that three-phase rotor field coil and stator winding, the excitation mode of three-phase AC excitation winding are asynchronous excitation.
Stator winding is connected with grid side bus, and three-phase rotor field coil is in series with one end of voltage source inverter, and the other end of voltage source inverter is in parallel with super capacitor.
One end of voltage-source type commutator is connected with grid side bus, and the other end of voltage-source type commutator is also in parallel with super capacitor.
Super capacitor, for providing energy to voltage source inverter, and can maintain the voltage levvl of voltage source inverter.
Voltage-source type commutator, for absorbing active power from grid side, is unidirectional current by the AC conversion of grid side, provides meritorious to super capacitor and voltage source inverter, reactive power is sent to electrical network simultaneously.
Voltage source inverter, is the three-phase AC excitation electric current required for three-phase rotor field coil for the DC inverter conveying of voltage-source type commutator come.
Rotor in comprehensive phase modifier is connected with phase modifier controller, and the rotating speed of rotor can be adjusted by phase modifier controller, thus is balanced the active power of electrical network.
When the rotating speed of comprehensive phase modifier rotor raises, active power will flow to voltage-source type commutator from comprehensive phase modifier, i.e. meritorious to electrical network output；When the rotating speed of comprehensive phase modifier rotor declines, active power will flow to comprehensive phase modifier from voltage-source type commutator, i.e. absorb the unnecessary active power of electrical network.
Described stator winding and voltage-source type commutator all can carry reactive power to electrical network, and wherein, stator winding is Q1 to the reactive power that electrical network carries, and voltage-source type commutator is Q2 to the reactive power that electrical network carries.
The present invention also provides for a kind of method using the comprehensive phase modifier of asynchronous excitation to carry out reactive-load compensation and active balance, and a kind of this method using the comprehensive phase modifier of asynchronous excitation to carry out reactive-load compensation and active balance has higher reactive-load compensation, active balance ability and dynamic regulating power.
A kind of method using the comprehensive phase modifier of asynchronous excitation to carry out reactive-load compensation and active balance, comprises the steps:
The first step, grid disturbance signal detection: when breaking down in electrical network somewhere, phase modifier controller will receive fault message, and grid disturbance signal be detected, and this grid disturbance signal includes that line voltage declines and change occurs in the rotating speed of comprehensive phase modifier rotor；Now, comprehensive phase modifier will be gone to transient state operation by steady-state operation.
Second step, balances network re-active power: after phase modifier controller detects grid disturbance signal, and the rotor instructed in comprehensive phase modifier is reduced rotating speed, absorbs electrical network unnecessary meritorious, carries out network re-active power balance.
3rd step, electric network reactive compensation: voltage source inverter will increase the exciting current of three-phase rotor field coil in comprehensive phase modifier according to demand, the reactive power Q 1 keeping stator winding to carry to electrical network is normal；Meanwhile, voltage-source type commutator carries reactive power Q 2 to electrical network, maintains voltage level of power grid.
4th step, failure removal signal receives: within the setting time, if phase modifier controller does not receives failure removal signal, then continuation second step is to the 3rd step, till receiving failure removal signal.
5th step, going to steady-state operation: after phase modifier controller receives failure removal signal, line voltage recovers, and the voltage source inverter instructed in comprehensive phase modifier is gradually reduced exciting current by phase modifier controller, until before indices returns to fault, i.e. going to steady-state operation.
In described 3rd step, voltage-source type commutator is while providing energy to voltage source inverter, constant to issue additional the form maintenance line voltage of reactive power Q 2.
After the present invention uses said structure and method, have the advantages that
The most above-mentioned voltage-source type commutator, can not only be three-phase rotor field coil stable power-supplying, also is able to carry reactive power to electrical network simultaneously, improves the reactive power compensation planning of comprehensive phase modifier；And voltage-source type commutator can increase power system damping, the concussion in suppression power system.
The most above-mentioned voltage source inverter directly can be powered to three-phase rotor field coil, it is possible to changes the size of three-phase AC excitation electric current according to demand so that this phase modifier has more preferable motility.
3. by the regulation to rotor speed, it is possible to reach the effect utilizing phase modifier that active power is balanced so that the more traditional conventional phase modifier of this phase modifier has better performance.
Accompanying drawing explanation
Fig. 1 shows the structural representation of the present invention comprehensive phase modifier of a kind of asynchronous excitation.
Fig. 2 shows that the present invention comprehensive phase modifier of asynchronous excitation carries out the control block diagram of reactive-load compensation and active balance method.
Wherein have:
1. three-phase AC excitation winding；11. three-phase rotor field coils；12. stator winding；
2. grid side bus；3. voltage source inverter；4. super capacitor；5. voltage-source type commutator.
It addition, involved character definition is as follows in Fig. 2:
P: represent the conveying active power in grid failure state.
F: represent the frequency in grid failure state.
Q: represent the conveying reactive power in grid failure state.
U ': represent the voltage under grid failure state.
P1: represent the conveying active power after the phase modifier absorption unnecessary active power of electrical network.
F1: represent the mains frequency after the phase modifier absorption unnecessary active power of electrical network.
U: represent phase modifier line voltage after electrical network additional issue reactive power.
Δ p: represent the difference of the P1 after the phase modifier absorption unnecessary active power of electrical network and former power P.
Δ f: represent the difference of mains frequency f1 and the primary frequency f after the phase modifier absorption unnecessary active power of electrical network.
Δ U: represent the difference of phase modifier line voltage U and primary voltage U ' after electrical network additional issue reactive power.
PI: represent PI algorithm, i.e. ratio and integral algorithm, for control strategy conventional in automatically controlling.
ω 0: represent the rotor speed under power frequency, generally take 3000r/min.
Detailed description of the invention
The present invention is further detailed explanation with concrete better embodiment below in conjunction with the accompanying drawings.
As it is shown in figure 1, the comprehensive phase modifier of a kind of asynchronous excitation, including three-phase AC excitation winding 1, voltage source inverter 3, super capacitor 4 and voltage-source type commutator 5.
Three-phase AC excitation winding includes three-phase rotor field coil 11 and stator winding 12, and the excitation mode of three-phase AC excitation winding is asynchronous excitation.
Stator winding is connected with grid side bus 2, and three-phase rotor field coil is in series with one end of voltage source inverter, and the other end of voltage source inverter is in parallel with super capacitor.
One end of voltage-source type commutator is connected with grid side bus, and the other end of voltage-source type commutator is also in parallel with super capacitor.
Super capacitor, for providing energy to voltage source inverter, and can maintain the voltage levvl of voltage source inverter.Super capacitor is energy cell, simple in construction.
Voltage-source type commutator, for absorbing active power from grid side, is unidirectional current by the AC conversion of grid side, provides meritorious to super capacitor and voltage source inverter, reactive power is sent to electrical network simultaneously.
In the application, voltage-source type commutator is also the STATCOM in Fig. 2
。
STATCOM namely STATCOM, be important reactive-load compensation equipment, himself is also a kind of commutator.In this patent, STATCOM uses as voltage-source type commutator, is connected with super capacitor etc..Rectification is its Main Function, also has the effect of compensating reactive power simultaneously.
The size of DC current that voltage-source type commutator produces and the make and break period (i.e. the dutycycle of PWM ripple) of switching device have strict corresponding relation, simultaneously because voltage-source type commutator inherently STATCOM herein, the make and break period of switching device can affect its size reissuing reactive power Q 2 naturally.
Voltage source inverter, is also rotor excitation current controller, is the three-phase AC excitation electric current required for three-phase rotor field coil for the DC inverter conveying of voltage-source type commutator come.
Rotor in comprehensive phase modifier is connected with phase modifier controller, and the rotating speed of rotor can be adjusted by phase modifier controller, thus is balanced the active power of electrical network.
When the rotating speed of comprehensive phase modifier rotor raises, active power will flow to voltage-source type commutator from comprehensive phase modifier, i.e. meritorious to electrical network output；When the rotating speed of comprehensive phase modifier rotor declines, active power will flow to comprehensive phase modifier from voltage-source type commutator, i.e. absorb the unnecessary active power of electrical network.
Described stator winding and voltage-source type commutator all can carry reactive power to electrical network, and wherein, stator winding is Q1 to the reactive power that electrical network carries, and voltage-source type commutator is Q2 to the reactive power that electrical network carries.
As in figure 2 it is shown, a kind of method using the comprehensive phase modifier of asynchronous excitation to carry out reactive-load compensation and active balance, comprise the steps.
The first step, grid disturbance signal detection: when breaking down in electrical network somewhere, phase modifier controller will receive fault message, and grid disturbance signal be detected.
Phase modifier controller includes human-computer interaction interface, input signal processing unit and output unit etc..
Input signal processing unit is built in comprehensive phase modifier place power plant.Its status is similar to common power plant, will accept the instruction of grid dispatching center and relevant parameter and need to upload related data.
The fault message that above-mentioned phase modifier controller receives includes: grid dispatching center transmits the information such as frequency f in conveying active-power P, grid failure state in grid failure state, the conveying reactive power Q in grid failure state and the voltage U ' under grid failure state.
The grid disturbance signal that phase modifier controller detects includes that line voltage declines and change occurs in the rotating speed of comprehensive phase modifier rotor；Now, comprehensive phase modifier will be gone to transient state operation by steady-state operation.
Second step, balances network re-active power, is also the real power control in Fig. 2 controlling unit: after phase modifier controller detects grid disturbance signal, and the rotor instructed in comprehensive phase modifier is reduced rotating speed, absorbs electrical network unnecessary meritorious, carries out network re-active power balance.
As in figure 2 it is shown, regulation rotor speed ω 1 so that when ω 1 > ω 0, carry active power to electrical network；When ω 1 < ω 0, absorb electrical network unnecessary meritorious, thus realize the control of active balance.
3rd step, electric network reactive compensation, also being the reactive-load compensation in Fig. 2 controlling unit and Voltage Stability Control: voltage source inverter will increase the exciting current of three-phase rotor field coil in comprehensive phase modifier according to demand, the reactive power Q 1 keeping stator winding to carry to electrical network is normal；Meanwhile, voltage-source type commutator carries reactive power Q 2 to electrical network, maintains voltage level of power grid.
In above-mentioned 3rd step, voltage-source type commutator is while providing energy to voltage source inverter, constant to issue additional the form maintenance line voltage of reactive power Q 2.
Namely after fault occurs, on the one hand need to increase rotor excitation current, on the one hand need to issue additional idle, that is, occur to fault from fault terminate, during whole fault, phase modifier controller will transmit, to the switching device of STATCOM, the PWM waveform calculated, to meet the requirement of rotor automatic field forcing and compensating reactive power.
Power plant's aspect calculates the parameters (PWM duty cycle of STATCOM, rotor speed etc.) adjusting this phase modifier by data, by PI algorithm, carry out real power control, reactive-load compensation and Voltage Stability Control respectively, the active power that electrical network is carried is decreased to p1, mains frequency becomes f1, and line voltage becomes U.
And the parameters of phase modifier is revised by Δ p, Δ f, Δ U, maintain the indices of electrical network, make electrical network not unstability in transient process, until failure removal.
4th step, failure removal signal receives: within the setting time, if phase modifier controller does not receives failure removal signal, then continuation second step is to the 3rd step, till receiving failure removal signal.
5th step, going to steady-state operation: after phase modifier controller receives failure removal signal, line voltage recovers, and the voltage source inverter instructed in comprehensive phase modifier is gradually reduced exciting current by phase modifier controller, until before indices returns to fault, i.e. going to steady-state operation.
Owing to fault most in electrical network belongs to short trouble, therefore mentioned in this patent " fault " refers to short trouble the most substantially.When power system is short-circuited fault, from " law of equal areas ", in order to reduce acceleration area, frequently with strategy increase the output electromagnetic power of electromotor exactly, i.e. require to increase exciting current (i.e. automatic field forcing), therefore can be more than exciting current when normally working at transient state operation phase exciting current.So, when going to properly functioning, need the big electric current of original automatic field forcing is decreased to normal value.
To sum up, by controlling rotor speed in the present invention, make phase modifier absorb a part of circuit be short-circuited fault time electrical network in unnecessary energy, its inertia is relatively strong, the beneficially safety and stablization of electrical network；Utilizing asynchronous exciter control system in the present invention, improve the reactive power compensation planning of comprehensive phase modifier, its transient performance is more preferable；Voltage-source type commutator is employed herein, power system damping, the concussion in suppression power system can be increased.
Compared with prior art, the present invention can utilize novel phase modifier and the respective advantage of voltage-source type commutator, not only overcome the deficiency being individually present during reactive-load compensation, but also on the premise of not increasing existing component size, considerably increase the stable of inertia and the system damping of phase modifier, beneficially electrical network and safe operation.
The preferred embodiment of the present invention described in detail above; but, the present invention is not limited to the detail in above-mentioned embodiment, in the technology concept of the present invention; technical scheme can be carried out multiple equivalents, these equivalents belong to protection scope of the present invention.
Claims (6)
1. the comprehensive phase modifier of asynchronous excitation, it is characterised in that: include three-phase AC excitation winding, voltage source inverter, super capacitor and voltage-source type commutator；
Three-phase AC excitation winding includes that three-phase rotor field coil and stator winding, the excitation mode of three-phase AC excitation winding are asynchronous excitation；
Stator winding is connected with grid side bus, and three-phase rotor field coil is in series with one end of voltage source inverter, and the other end of voltage source inverter is in parallel with super capacitor；
One end of voltage-source type commutator is connected with grid side bus, and the other end of voltage-source type commutator is also in parallel with super capacitor；
Super capacitor, for providing energy to voltage source inverter, and can maintain the voltage levvl of voltage source inverter；
Voltage-source type commutator, for absorbing active power from grid side, is unidirectional current by the AC conversion of grid side, provides meritorious to super capacitor and voltage source inverter, reactive power is sent to electrical network simultaneously；
Voltage source inverter, is the three-phase AC excitation electric current required for three-phase rotor field coil for the DC inverter conveying of voltage-source type commutator come.
The comprehensive phase modifier of asynchronous excitation the most according to claim 1, it is characterised in that: the rotor in comprehensive phase modifier is connected with phase modifier controller, and the rotating speed of rotor can be adjusted by phase modifier controller, thus is balanced the active power of electrical network.
The comprehensive phase modifier of asynchronous excitation the most according to claim 2, it is characterised in that: when the rotating speed of comprehensive phase modifier rotor raises, active power will flow to voltage-source type commutator from comprehensive phase modifier, i.e. meritorious to electrical network output；When the rotating speed of comprehensive phase modifier rotor declines, active power will flow to comprehensive phase modifier from voltage-source type commutator, i.e. absorb the unnecessary active power of electrical network.
The comprehensive phase modifier of asynchronous excitation the most according to claim 1, it is characterized in that: described stator winding and voltage-source type commutator all can carry reactive power to electrical network, wherein, stator winding is Q1 to the reactive power that electrical network carries, and voltage-source type commutator is Q2 to the reactive power that electrical network carries.
5. one kind uses the method that the comprehensive phase modifier of asynchronous excitation as described in any one of claim 1-4 carries out reactive-load compensation and active balance, it is characterised in that: comprise the steps:
The first step, grid disturbance signal detection: when breaking down in electrical network somewhere, phase modifier controller will receive fault message, and grid disturbance signal be detected, and this grid disturbance signal includes that line voltage declines and change occurs in the rotating speed of comprehensive phase modifier rotor；Now, comprehensive phase modifier will be gone to transient state operation by steady-state operation；
Second step, balances network re-active power: after phase modifier controller detects grid disturbance signal, and the rotor instructed in comprehensive phase modifier is reduced rotating speed, absorbs electrical network unnecessary meritorious, carries out network re-active power balance；
3rd step, electric network reactive compensation: voltage source inverter will increase the exciting current of three-phase rotor field coil in comprehensive phase modifier according to demand, the reactive power Q 1 keeping stator winding to carry to electrical network is normal；Meanwhile, voltage-source type commutator carries reactive power Q 2 to electrical network, maintains voltage level of power grid；
4th step, failure removal signal receives: within the setting time, if phase modifier controller does not receives failure removal signal, then continuation second step is to the 3rd step, till receiving failure removal signal；
5th step, going to steady-state operation: after phase modifier controller receives failure removal signal, line voltage recovers, and the voltage source inverter instructed in comprehensive phase modifier is gradually reduced exciting current by phase modifier controller, until before indices returns to fault, i.e. going to steady-state operation.
6. the method using the comprehensive phase modifier of asynchronous excitation to carry out reactive-load compensation and active balance as claimed in claim 5, it is characterized in that: in described 3rd step, voltage-source type commutator is while providing energy to voltage source inverter, constant to issue additional the form maintenance line voltage of reactive power Q 2.
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| CN201610474932.9A CN106026122B (en) | 2016-06-24 | 2016-06-24 | A kind of method that asynchronous excitation integrates phase modifier and its reactive-load compensation and active balance |
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| CN107453404A (en) * | 2017-08-08 | 2017-12-08 | 国家电网公司 | A kind of large-scale phase modifier starts combination method |
| CN108092274A (en) * | 2017-12-05 | 2018-05-29 | 国电南瑞科技股份有限公司 | The phase modifier excitation system control method of voltage and reactive power double-closed-loop control |
| CN109412170A (en) * | 2018-09-11 | 2019-03-01 | 中国电力科学研究院有限公司 | A kind of method and system determining phase modifier field loss protection based on reactive power |
| CN111262254A (en) * | 2020-04-14 | 2020-06-09 | 中国电力科学研究院有限公司 | Phase modulator control method, phase modulator control device, phase modulator system and storage medium |
| CN112865129A (en) * | 2021-04-08 | 2021-05-28 | 哈尔滨理工大学 | Static phase modifier |
| CN113410847A (en) * | 2021-08-04 | 2021-09-17 | 国网黑龙江省电力有限公司电力科学研究院 | Excitation control method of asynchronous phase modulator |
| CN113595141A (en) * | 2021-08-10 | 2021-11-02 | 哈尔滨理工大学 | AC excitation device of asynchronous phase modulator |
| CN117081098A (en) * | 2023-07-20 | 2023-11-17 | 华中科技大学 | High-inertia high-power rapid frequency/voltage stabilizing device for new energy power system |
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| CN107453404A (en) * | 2017-08-08 | 2017-12-08 | 国家电网公司 | A kind of large-scale phase modifier starts combination method |
| CN108092274A (en) * | 2017-12-05 | 2018-05-29 | 国电南瑞科技股份有限公司 | The phase modifier excitation system control method of voltage and reactive power double-closed-loop control |
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| CN113410847A (en) * | 2021-08-04 | 2021-09-17 | 国网黑龙江省电力有限公司电力科学研究院 | Excitation control method of asynchronous phase modulator |
| CN113595141A (en) * | 2021-08-10 | 2021-11-02 | 哈尔滨理工大学 | AC excitation device of asynchronous phase modulator |
| CN117081098A (en) * | 2023-07-20 | 2023-11-17 | 华中科技大学 | High-inertia high-power rapid frequency/voltage stabilizing device for new energy power system |
| CN117081098B (en) * | 2023-07-20 | 2024-04-19 | 华中科技大学 | High-inertia high-power rapid frequency/voltage stabilizing device for new energy power system |
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