CN106936282A - A kind of synchronous generator asynchronization capacity-increasing transformation system based on rotary transformer - Google Patents

A kind of synchronous generator asynchronization capacity-increasing transformation system based on rotary transformer Download PDF

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Publication number
CN106936282A
CN106936282A CN201511011747.8A CN201511011747A CN106936282A CN 106936282 A CN106936282 A CN 106936282A CN 201511011747 A CN201511011747 A CN 201511011747A CN 106936282 A CN106936282 A CN 106936282A
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Prior art keywords
generator
synchronous generator
rotary transformer
synchronous
rotor
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CN201511011747.8A
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Chinese (zh)
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谢宝忠
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South China University of Technology SCUT
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South China University of Technology SCUT
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K19/00—Synchronous motors or generators
    • H02K19/16—Synchronous generators
    • H02K19/36—Structural association of synchronous generators with auxiliary electric devices influencing the characteristic of the generator or controlling the generator, e.g. with impedances or switches
    • 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
    • H02P9/04—Control effected upon non-electric prime mover and dependent upon electric output value of the generator

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Eletrric Generators (AREA)

Abstract

本发明公开了一种基于旋转变压器的同步发电机异步化增容改造系统，包括同步发电机、用于替换同步发电机转子的绕线式双馈异步发电机转子、旋转变压器、变流器、转速控制系统、交流母线、辅助系统、测量控制系统、原动机及其传动机构。本发明保留原同步发电机的定子，将原同步发电机转子替换为与定子绕组极数相同的双馈异步发电机转子，并在与发电机转子同轴位置加装旋转变压器，通过变流器控制旋转变压器静绕组的电气参数，实现变速恒频控制。本发明结合同步发电机与双馈异步发电机的特性，对原系统的改动较小，改造成本较低，无电刷滑环，提高原动机的运行效率，改善原发电机组的运行工况，提高发电机组的容量。

The invention discloses a rotary transformer-based synchronous generator asynchronous capacity-increasing transformation system, including a synchronous generator, a winding type doubly-fed asynchronous generator rotor for replacing the synchronous generator rotor, a rotary transformer, a converter, Speed control system, AC bus, auxiliary system, measurement control system, prime mover and its transmission mechanism. The invention retains the stator of the original synchronous generator, replaces the rotor of the original synchronous generator with a doubly-fed asynchronous generator rotor with the same number of poles as the stator winding, and installs a rotary transformer at the coaxial position with the generator rotor. Control the electrical parameters of the static winding of the resolver to realize variable speed and constant frequency control. The present invention combines the characteristics of the synchronous generator and the doubly-fed asynchronous generator, the modification of the original system is small, the transformation cost is low, there is no brush slip ring, the operation efficiency of the prime mover is improved, and the operation condition of the original generator set is improved , to increase the capacity of the generating set.

Description

A kind of synchronous generator asynchronization capacity-increasing transformation system based on rotary transformer
Technical field
The present invention relates to synchronous generator and double-fed asynchronous electricity generation system, more particularly to a kind of synchronous generator asynchronization capacity-increasing transformation system based on rotary transformer.
Background technology
Synchronous generator is so that its capacity is big, adjustable active power and reactive power the advantages of be widely used in hydroelectric generation, wind-power electricity generation, thermal power generation equal energy source are developed.Due to being constrained by conditions such as mains frequency, the unstability of power generation operation material and dispatchings of power netwoks, prevent driving prime mover of these synchronous generators from being in optimal working speed all the time, and then cause the degrading of generating set, vibration aggravation, efficiency reduction, have impact on the safe operation of generating set.
With the development of current energy development, in order to improve the efficient energy conversion of prime mover, in the exploitation of the clean energy resourcies such as hydroelectric generation, wind-power electricity generation, tidal power generation and wave-activated power generation, double-fed asynchronous generator has been widely used.During double-fed asynchronous generator group works, the rotating speed of prime mover can change in the range of certain, and the rotating speed of the double-fed asynchronous generator being driven by it changes therewith.
The content of the invention
Advantage it is an object of the invention to combine above-mentioned prior art, a kind of synchronous generator asynchronization capacity-increasing transformation system based on rotary transformer is provided, improve the operational efficiency of prime mover and whole generating set, improve the operating condition of former Synchronous generator, the capacity of generating set is improved, the stability of generating set operation is improved.
The present invention is achieved through the following technical solutions：
A kind of synchronous generator asynchronization capacity-increasing transformation system based on rotary transformer, double-fed asynchronous generator rotor, rotary transformer, current transformer, revolution speed control system, ac bus, accessory system, prime mover and transmission mechanism including synchronous generator, for replacing synchronous generator rotor
The stator winding of the synchronous generator is connected with ac bus, and double-fed asynchronous generator rotor windings are connected with the dynamic winding circuit of rotary transformer, and double-fed asynchronous generator rotor and the rotary transformer of the synchronous generator are co-axially mounted；
The current transformer is connected with the quiet winding circuit of rotary transformer, for the electric parameter according to the quiet winding of synchronous generator adjustment of rotational speed, and dynamic winding is passed to by the air-gap field between dynamic and static winding, and then control the electric parameter of double-fed asynchronous generator rotor, realize the variable speed constant frequency control of whole unit, power is conveyed to ac bus when generating set runs on supersynchronous state, electrical power is absorbed from ac bus when generating set runs on metasynchronism state and synchronous regime；
The transmission mechanism is used to couple prime mover and double-fed asynchronous generator rotor, realizes transmission and the transformation of speed of power；The revolution speed control system is used to be adjusted according to the operating condition of whole system the rotating speed of prime mover, and the efficient conversion or limitation power input for realizing energy make whole system be in the operation interval of safety；
The accessory system includes providing necessary ventilation, radiating, the oil of de-icing work environment, gas and water, electric equipment for the safe and reliable work of system.
Further, also including Measurement and Control System, the Measurement and Control System is used to detect running status, the parameter of each equipment, control prime mover, the rotating speed of synchronous generator, and then controls the operation of each current transformer, monitors the safe and stable operation of whole system.
Further, described prime mover includes wind energy conversion system, steam turbine, the hydraulic turbine.
Further, the electric parameter includes voltage, electric current, frequency, phase.
The present invention has the following advantages and effect relative to prior art：
It is of the invention simple, it is easy to accomplish.
The present invention retains the stator and stator winding of former synchronous generator, only the rotor of former Synchronous generator is replaced with and stator winding number of poles identical double-fed asynchronous generator rotor, and with generator amature coaxial position on install additional rotary transformer for increase-volume part power output, change to original system is smaller, improvement cost is relatively low, brushless slip ring, with reference to synchronous generator and the characteristic of asynchronous generator, improve the operational efficiency of prime mover, improve the operating condition of primary group of motors, improve the capacity of generating set.Change to original system is smaller, and improvement cost is relatively low.
As described above, the system technological means is simple and easy to do, with reference to synchronous generator and the characteristic of asynchronous generator, improve the operational efficiency of prime mover and whole generating set, improve the operating condition of former Synchronous generator, improve the capacity of generating set, improve the stability of generating set operation.
Brief description of the drawings
Fig. 1 is the structure square frame and control schematic diagram of the embodiment of the present invention.
Specific embodiment
Goal of the invention of the invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings, embodiment can not be repeated one by one herein, but therefore embodiments of the present invention are not defined in following examples.
Embodiment 1
As shown in Figure 1, a kind of synchronous generator asynchronization capacity-increasing transformation system based on rotary transformer, double-fed asynchronous generator rotor, rotary transformer, current transformer, revolution speed control system, ac bus, accessory system, Measurement and Control System, prime mover and transmission mechanism including synchronous generator, for replacing synchronous generator rotor
The stator winding of the synchronous generator is connected with ac bus, and double-fed asynchronous generator rotor windings are connected with the dynamic winding circuit of rotary transformer, and double-fed asynchronous generator rotor and the rotary transformer of the synchronous generator are co-axially mounted；
The current transformer is connected with the quiet winding circuit of rotary transformer, for the electric parameter according to the quiet winding of synchronous generator adjustment of rotational speed, and dynamic winding is passed to by the air-gap field between dynamic and static winding, and then control the electric parameter of double-fed asynchronous generator rotor, realize the variable speed constant frequency control of whole unit, when generating set runs on supersynchronous state power is conveyed to ac bus, electrical power is absorbed from ac bus when generating set runs on metasynchronism state and synchronous regime, the electric parameter includes voltage, electric current, frequency, phase；
The transmission mechanism is used to couple prime mover and double-fed asynchronous generator rotor, realizes transmission and the transformation of speed of power；The revolution speed control system is used to be adjusted according to the operating condition of whole system the rotating speed of prime mover, and the efficient conversion or limitation power input for realizing energy make whole system be in the operation interval of safety；
The accessory system includes providing necessary ventilation, radiating, the oil of de-icing work environment, gas and water, electric equipment for the safe and reliable work of system；
Specifically, the Measurement and Control System is used to detect running status, the parameter of each equipment, control prime mover, the rotating speed of synchronous generator, and then control the operation of each current transformer, monitor the safe and stable operation of whole system, wherein measurement part can be using conventional voltmeter, ammeter or universal meter measurement voltage, power frequency etc., using rotating speed, moment of torsion and power meter measures rotating speed power, its control section can be run using control devices with the signal output function such as RS485, RS232 such as conventional PLC or single-chip microcomputer according to each equipment of surveyed parameter adjustment.
Specifically, described prime mover includes wind energy conversion system, steam turbine, the hydraulic turbine, realizes the application in occasions such as wind-power electricity generation, firepower or water generatings.
The present embodiment technological means is simple and easy to do, with reference to synchronous generator and the characteristic of asynchronous generator, the operational efficiency of prime mover and whole generating set is improved, improve the operating condition of former Synchronous generator, the capacity of generating set is improved, the stability of generating set operation is improved.
Embodiments of the present invention are simultaneously not restricted to the described embodiments; other it is any without departing from Spirit Essence of the invention and the change, modification, replacement made under principle, combine, simplify; equivalent substitute mode is should be, is included within protection scope of the present invention.

Claims (4)

1.一种基于旋转变压器的同步发电机异步化增容改造系统，其特征在于：包括同步发电机、用于替换同步发电机转子的双馈异步发电机转子、旋转变压器、变流器、转速控制系统、交流母线、辅助系统、原动机及传动机构， 1. An asynchronous capacity-increasing transformation system for synchronous generators based on a rotary transformer, characterized in that: it includes a synchronous generator, a doubly-fed asynchronous generator rotor for replacing a synchronous generator rotor, a rotary transformer, a converter, a rotating speed Control system, AC bus, auxiliary system, prime mover and transmission mechanism, 所述同步发电机的定子绕组与交流母线相连，双馈异步发电机转子绕组与旋转变压器动绕组电路连接，所述同步发电机的双馈异步发电机转子与旋转变压器同轴安装； The stator winding of the synchronous generator is connected to the AC bus, the rotor winding of the double-fed asynchronous generator is connected to the moving winding circuit of the rotary transformer, and the rotor of the double-fed asynchronous generator of the synchronous generator is installed coaxially with the rotary transformer; 所述变流器与旋转变压器的静绕组电路相连，用于根据同步发电机转速调整静绕组的电气参数，并通过动、静绕组间的气隙磁场传递给动绕组，进而控制双馈异步发电机转子的电气参数，实现整个机组的变速恒频控制，在发电机组运行于超同步状态时向交流母线输送功率，在发电机组运行于亚同步状态及同步状态时从交流母线吸收电功率； The converter is connected to the static winding circuit of the rotary transformer, and is used to adjust the electrical parameters of the static winding according to the synchronous generator speed, and transmit it to the moving winding through the air gap magnetic field between the moving and static windings, thereby controlling the double-fed asynchronous power generation The electrical parameters of the generator rotor realize the variable speed and constant frequency control of the whole unit, transmit power to the AC busbar when the generator set is running in a super-synchronous state, and absorb electric power from the AC busbar when the generator set is running in a sub-synchronous state and a synchronous state; 所述传动机构用于联接原动机及双馈异步发电机转子，实现动力的传递及转速变换；所述转速控制系统用于根据整个系统的运行工况调整原动机的转速，实现能量的高效转换或限制功率输入使整个系统处于安全的工作区间； The transmission mechanism is used to connect the prime mover and the double-fed asynchronous generator rotor to realize power transmission and speed conversion; the speed control system is used to adjust the speed of the prime mover according to the operating conditions of the entire system to achieve efficient energy conversion Or limit power input to keep the whole system in a safe working range; 所述辅助系统包括为系统安全可靠工作提供必要的通风、散热、除冰工作环境的油、气、水、电设备。 The auxiliary system includes oil, gas, water, and electrical equipment that provide the necessary ventilation, heat dissipation, and deicing working environment for the safe and reliable operation of the system. 2.根据权利要求1所述的基于旋转变压器的同步发电机异步化增容改造系统，其特征在于:还包括测量控制系统，所述测量控制系统用于检测各设备的运行状态、参数，控制原动机、同步发电机的转速，进而控制各变流器的运行，监控整个系统的安全稳定运行。 2. the asynchronous capacity-increasing transformation system of synchronous generator based on rotary transformer according to claim 1, is characterized in that: also comprises measurement control system, and described measurement control system is used for detecting the operation status, parameter of each equipment, control The speed of the prime mover and synchronous generator controls the operation of each converter and monitors the safe and stable operation of the entire system. 3.根据权利要求1所述的基于旋转变压器的同步发电机异步化增容改造系统，其特征在于:所述原动机包括风力机、汽轮机、水轮机。 3. The asynchronous capacity-increasing transformation system of a synchronous generator based on a rotary transformer according to claim 1, wherein said prime mover comprises a wind turbine, a steam turbine, and a water turbine. 4.根据权利要求1所述的基于旋转变压器的同步发电机异步化增容改造系统，其特征在于:所述电气参数包括电压、电流、频率、相位。 4. The asynchronous capacity-increasing transformation system of a synchronous generator based on a rotary transformer according to claim 1, wherein said electrical parameters include voltage, current, frequency, and phase.
CN201511011747.8A 2015-12-30 2015-12-30 A kind of synchronous generator asynchronization capacity-increasing transformation system based on rotary transformer Pending CN106936282A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113013918A (en) * 2021-02-08 2021-06-22 广州华南鑫沨能源科技有限公司 Alternating current excitation transformation method and system for grid-connected direct current excitation synchronous generator set
RU2761246C1 (en) * 2021-05-07 2021-12-06 Федеральное государственное бюджетное образовательное учреждение высшего образования "Комсомольский-на-Амуре государственный университет" (ФГБОУ ВО "КнАГУ") Excitation system of asynchronous synchronous machine

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Publication number Priority date Publication date Assignee Title
CN101242157A (en) * 2008-01-25 2008-08-13 华南理工大学 A cascade variable speed constant frequency wind power generation system
CN203942288U (en) * 2014-06-06 2014-11-12 华南理工大学 A kind of double-fed wind generator AC and DC grid-connected system
CN204498036U (en) * 2015-04-23 2015-07-22 三峡大学 A kind of excitation unit of double-fed wind power generator
CN105186576A (en) * 2015-09-24 2015-12-23 华南理工大学 Double-fed asynchronously transformed synchronous generating set system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101242157A (en) * 2008-01-25 2008-08-13 华南理工大学 A cascade variable speed constant frequency wind power generation system
CN203942288U (en) * 2014-06-06 2014-11-12 华南理工大学 A kind of double-fed wind generator AC and DC grid-connected system
CN204498036U (en) * 2015-04-23 2015-07-22 三峡大学 A kind of excitation unit of double-fed wind power generator
CN105186576A (en) * 2015-09-24 2015-12-23 华南理工大学 Double-fed asynchronously transformed synchronous generating set system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113013918A (en) * 2021-02-08 2021-06-22 广州华南鑫沨能源科技有限公司 Alternating current excitation transformation method and system for grid-connected direct current excitation synchronous generator set
RU2761246C1 (en) * 2021-05-07 2021-12-06 Федеральное государственное бюджетное образовательное учреждение высшего образования "Комсомольский-на-Амуре государственный университет" (ФГБОУ ВО "КнАГУ") Excitation system of asynchronous synchronous machine

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Application publication date: 20170707