CN105322853B - A kind of redundancy structure of nuclear power plant's excitation system - Google Patents
A kind of redundancy structure of nuclear power plant's excitation system Download PDFInfo
- Publication number
- CN105322853B CN105322853B CN201410363292.5A CN201410363292A CN105322853B CN 105322853 B CN105322853 B CN 105322853B CN 201410363292 A CN201410363292 A CN 201410363292A CN 105322853 B CN105322853 B CN 105322853B
- Authority
- CN
- China
- Prior art keywords
- redundant
- power supply
- control board
- control
- signal
- 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.)
- Active
Links
- 230000005284 excitation Effects 0.000 title claims abstract description 57
- 230000005347 demagnetization Effects 0.000 claims description 10
- 238000004804 winding Methods 0.000 claims description 8
- 238000005259 measurement Methods 0.000 claims description 4
- 239000003381 stabilizer Substances 0.000 claims description 4
- 230000005389 magnetism Effects 0.000 claims 1
- 238000013461 design Methods 0.000 abstract description 12
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000005070 sampling Methods 0.000 description 13
- 238000010586 diagram Methods 0.000 description 6
- 238000002955 isolation Methods 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
Landscapes
- Stand-By Power Supply Arrangements (AREA)
Abstract
本发明实施例公开了一种核电厂励磁系统的冗余结构,包括:冗余控制电源、冗余信号回路、冗余跳闸回路和冗余整流桥。上述四个冗余模块分别对控制电源、信号回路、跳闸回路和整流桥进行了冗余设计。本发明实施例具有如下有益效果:本发明从励磁系统整体出发,全面考虑核电厂对励磁系统的冗余需求,通过四个冗余模块来充分保证核电厂励磁系统安全、稳定地运行。
The embodiment of the invention discloses a redundant structure of an excitation system of a nuclear power plant, comprising: a redundant control power supply, a redundant signal circuit, a redundant trip circuit and a redundant rectifier bridge. The above four redundant modules carry out redundant design for the control power supply, signal circuit, trip circuit and rectifier bridge respectively. The embodiment of the present invention has the following beneficial effects: the present invention starts from the excitation system as a whole, fully considers the redundancy requirements of the nuclear power plant for the excitation system, and fully ensures the safe and stable operation of the nuclear power plant excitation system through four redundant modules.
Description
技术领域technical field
本发明涉及核电技术,尤其涉及一种核电厂励磁系统的冗余结构。The invention relates to nuclear power technology, in particular to a redundant structure of an excitation system of a nuclear power plant.
背景技术Background technique
由于核电厂对安全性和稳定性的严苛要求,在核电厂发电系统的设计中,各子系统的设计中都需要采用冗余设计。励磁系统作为核电厂发电的重要组成部分之一,现有技术中对励磁系统一般采用并联冗余和冷备冗余两种方案。在并联冗余结构中,运行桥的某可控硅出现直通故障时,在触发序列上邻近的、用于关断该可控硅的支臂将流过相间短路电流。由于并联冗余设计一般为两支路并联,该短路电流将足以使运行桥和备用桥的支臂快熔熔断,从而导致双桥退出和跳机。因此,对于并联支路数小于三的情况下,并联冗余结构对这种常见的故障类型不具有冗余作用,故而通常采用冷备冗余结构。Due to the strict requirements on safety and stability of nuclear power plants, in the design of power generation systems of nuclear power plants, redundancy design is required in the design of each subsystem. The excitation system is one of the important components of nuclear power plant power generation. In the prior art, the excitation system generally adopts two schemes of parallel redundancy and cold standby redundancy. In the parallel redundant structure, when a thyristor of the running bridge has a shoot-through fault, the adjacent arm used to turn off the thyristor in the trigger sequence will flow a phase-to-phase short-circuit current. Since the parallel redundant design is generally two branches connected in parallel, the short-circuit current will be enough to quickly fuse the arms of the running bridge and the backup bridge, resulting in the withdrawal and tripping of the double bridge. Therefore, when the number of parallel branches is less than three, the parallel redundant structure has no redundant effect on this common fault type, so the cold standby redundant structure is usually used.
在考虑励磁系统的整体设计中,冷备冗余结构要求两个通道的电源不能有电的联系,两个通道使用的控制板卡供电也不能有电的联系。而现有技术中,冷备冗余结构仅仅是对整流桥进行了冗余,并不能满足核电厂对励磁系统冗余的整体需求。In considering the overall design of the excitation system, the cold standby redundant structure requires that the power supplies of the two channels cannot be electrically connected, and the power supply of the control boards used by the two channels cannot be electrically connected. However, in the prior art, the cold standby redundant structure only provides redundancy for the rectifier bridge, and cannot meet the overall requirement of the nuclear power plant for the redundancy of the excitation system.
发明内容Contents of the invention
本发明实施例所要解决的技术问题在于,针对现有核电厂励磁系统冗余结构不能满足核电厂对励磁系统冗余的整体需求的缺陷,提供一种全面的核电厂励磁系统的冗余结构,以充分满足核电厂对励磁系统冗余的整体需求。The technical problem to be solved by the embodiments of the present invention is to provide a comprehensive redundant structure of the excitation system of the nuclear power plant in view of the defect that the existing redundancy structure of the excitation system of the nuclear power plant cannot meet the overall requirements of the redundancy of the excitation system of the nuclear power plant. In order to fully meet the overall requirements of the nuclear power plant for the redundancy of the excitation system.
为了解决上述技术问题,本发明实施例提供了一种核电厂励磁系统的冗余结构,包括:冗余控制电源、冗余信号回路、冗余跳闸回路和冗余整流桥;In order to solve the above technical problems, an embodiment of the present invention provides a redundant structure of the excitation system of a nuclear power plant, including: redundant control power supply, redundant signal loop, redundant trip loop and redundant rectifier bridge;
所述冗余控制电源用于对控制电源进行冗余,所述控制电源用于为控制板卡供电,所述冗余控制电源用于为冗余控制板卡供电;所述冗余信号回路用于对所述控制板卡的信号回路进行冗余,所述冗余信号回路连接所述冗余控制板卡;所述冗余跳闸回路用于对跳闸回路进行冗余,所述跳闸回路和所述冗余跳闸回路为灭磁开关和发变组保护之间的电路;所述冗余整流桥用于对整流桥进行冗余,所述整流桥和冗余整流桥对输入的交流电进行整流后获得直流电并输出至交流励磁机转子绕组。The redundant control power supply is used to redundant the control power supply, the control power supply is used to supply power to the control board, the redundant control power supply is used to supply power to the redundant control board; the redundant signal circuit is used In order to perform redundancy on the signal circuit of the control board, the redundant signal circuit is connected to the redundant control board; the redundant tripping circuit is used to perform redundancy on the tripping circuit, and the tripping circuit and the The redundant tripping circuit is a circuit between the demagnetization switch and the protection of the generator-transformer group; the redundant rectifier bridge is used to perform redundancy on the rectifier bridge, and the rectifier bridge and the redundant rectifier bridge rectify the input alternating current Obtain direct current and output it to the rotor winding of the AC exciter.
优选地,所述冗余控制电源包括冗余直流控制电源和冗余交流控制电源;Preferably, the redundant control power supply includes a redundant DC control power supply and a redundant AC control power supply;
所述冗余直流控制电源用于对直流控制电源进行冗余;所述冗余交流控制电源用于对来自交流副励磁机的交流控制电源进行冗余。The redundant DC control power supply is used for redundancy of the DC control power supply; the redundant AC control power supply is used for redundancy of the AC control power supply from the AC auxiliary exciter.
其中,所述冗余交流控制电源及所述交流控制电源的输入端分别通过两个低压变压器连接至所述交流副励磁机的输出端。Wherein, the redundant AC control power supply and the input terminal of the AC control power supply are respectively connected to the output terminal of the AC auxiliary exciter through two low-voltage transformers.
优选地,所述信号回路包括输入信号回路和输出信号回路;Preferably, the signal loop includes an input signal loop and an output signal loop;
输入信号包括来自控制室的增减磁、灭磁和手/自动选择开关的开关量信号以及参与励磁系统测量和控制用的发电机机端电压和机端电流的模拟量信号;输出信号包括至控制室的励磁调节器通道故障信号、限制器动作信号以及到电网的电力系统稳定器投入信号。The input signal includes the switch value signal of the increase and decrease of excitation, de-excitation and manual/automatic selection switch from the control room, and the analog signal of the generator terminal voltage and current used for the measurement and control of the excitation system; the output signal includes to The fault signal of the excitation regulator channel in the control room, the action signal of the limiter, and the input signal of the power system stabilizer to the grid.
其中,所述控制板卡和所述冗余控制板卡的输入端分别通过单独的电压线和单独的电流线对发电机的电压和电流进行采样。Wherein, the input terminals of the control board and the redundant control board sample the voltage and current of the generator through a separate voltage line and a separate current line respectively.
所述控制板卡和所述冗余控制板卡的输出端并联后连接至所述控制室。The output ends of the control board and the redundant control board are connected in parallel to the control room.
优选地,所述冗余跳闸回路包括灭磁开关端冗余单元和发变组保护端冗余单元;Preferably, the redundant trip circuit includes a redundant unit at the de-excitation switch end and a redundant unit at the protection end of the generator-transformer group;
所述灭磁开关端冗余单元用于对灭磁开关参与发变组保护逻辑的接点进行冗余;所述发变组保护端冗余单元用于对发变组保护使灭磁开关跳闸的回路进行冗余。The redundant unit at the end of the de-excitation switch is used to redundant the contacts of the de-excitation switch participating in the protection logic of the generator-transformer group; the redundant unit at the protection end of the generator-transformer group is used to trip the de-excitation switch for the protection of the generator-transformer The circuit is redundant.
优选地,所述冗余整流桥和所述整流桥的输入端通过一个灭磁开关连接至交流副励磁机的输出端。Preferably, the redundant rectifier bridge and the input end of the rectifier bridge are connected to the output end of the AC auxiliary exciter through a de-excitation switch.
优选地,在事故情况下,所述整流桥和所述控制板卡分别同时切换至所述冗余整流桥和所述冗余控制板卡。Preferably, in the event of an accident, the rectifier bridge and the control board are switched to the redundant rectifier bridge and the redundant control board respectively at the same time.
优选地,所述冗余整流桥模块与所述冗余控制板卡同柜配置。Preferably, the redundant rectifier bridge module and the redundant control board are configured in the same cabinet.
实施本发明实施例,具有如下有益效果:本发明在冷备冗余设计方案上,从励磁系统整体出发,设计了冗余控制电源、冗余信号回路、冗余跳闸回路和冗余整流桥共四个冗余模块,充分保证了核电厂对励磁系统冗余的整体需求,具有更高的安全性和稳定性。Implementing the embodiment of the present invention has the following beneficial effects: In terms of the cold standby redundant design scheme, the present invention designs redundant control power supplies, redundant signal circuits, redundant trip circuits and redundant rectifier bridges from the perspective of the excitation system as a whole. The four redundant modules fully guarantee the overall requirement of the nuclear power plant for the redundancy of the excitation system, and have higher safety and stability.
附图说明Description of drawings
为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.
图1是本发明提供的第一实施例核电厂励磁系统的冗余结构示意图;Fig. 1 is a schematic diagram of the redundant structure of the excitation system of the nuclear power plant according to the first embodiment provided by the present invention;
图2是本发明提供的第二实施例核电厂励磁系统的冗余结构示意图;Fig. 2 is a schematic diagram of the redundant structure of the excitation system of the nuclear power plant in the second embodiment provided by the present invention;
图3是本发明提供的第三实施例控制电源冗余结构示意图。Fig. 3 is a schematic diagram of a redundant control power supply structure according to a third embodiment of the present invention.
具体实施方式detailed description
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动的前提下所获得的所有其他实施例,都属于本发明保护的范围。The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
请参见图1,图1是本发明提供的第一实施例核电厂励磁系统的冗余结构示意图。如图1所示,本实施例提供的励磁系统包括两条励磁通道:通道10和通道20,其中通道10为系统默认励磁通道,而通道20为冗余通道,在通道10发生事故时,系统自动从通道10切换到通道20,从而保证励磁系统继续正常运行。在通道10中,永磁发电机1产生的交流电经过灭磁开关2和通道10交流侧开关11后输入到整流桥13中进行整流,进而从整流桥13的输出端输出直流电并输入到交流励磁机3的转子绕组31上,供交流励磁机3工作。在通道20中,永磁发电机1产生的交流电经过灭磁开关2和通道20交流侧开关21后输入到冗余整流桥23中进行整流,进而从冗余整流桥23的输出端输出直流电并输入到交流励磁机3的转子绕组31上,供交流励磁机3工作。Please refer to FIG. 1 . FIG. 1 is a schematic diagram of a redundant structure of an excitation system of a nuclear power plant according to a first embodiment of the present invention. As shown in Figure 1, the excitation system provided by this embodiment includes two excitation channels: channel 10 and channel 20, wherein channel 10 is the default excitation channel of the system, and channel 20 is a redundant channel. When an accident occurs in channel 10, the system Automatically switches from channel 10 to channel 20, thereby ensuring that the excitation system continues to operate normally. In the channel 10, the AC power generated by the permanent magnet generator 1 passes through the demagnetization switch 2 and the AC side switch 11 of the channel 10, and then is input to the rectifier bridge 13 for rectification, and then outputs DC power from the output terminal of the rectifier bridge 13 and is input to the AC excitation On the rotor winding 31 of the machine 3, it is used for the AC exciter 3 to work. In the channel 20, the AC power generated by the permanent magnet generator 1 passes through the demagnetization switch 2 and the AC side switch 21 of the channel 20, and then is input into the redundant rectifier bridge 23 for rectification, and then outputs DC power from the output terminal of the redundant rectifier bridge 23 and Input to the rotor winding 31 of the AC exciter 3 for the AC exciter 3 to work.
另外,控制板卡12除了对整流桥13的点弧角进行控制外,还能与整流桥13通信,整流桥13会将其工作状态信息发送给控制板卡12。当控制板卡12检测到整流桥13故障时,会将切换信号发送至通道20中的冗余控制板卡22。控制板卡12与冗余控制板卡22之间的连接可以是电连接,也可以是无线连接,还可以是光纤连接。当控制板卡12给冗余控制板卡22发送切换信号后,冗余控制板卡22与冗余整流桥23同时切换,控制板卡12和整流桥13停止工作。冗余控制板卡22和冗余整流桥13分别对控制板卡12和整流桥13进行冗余,因此当切换到通道20时,通道20和通道10的工作原理和信号传递完全相同,也就是说冗余控制板卡22和冗余整流桥23的结构和功能与控制板卡12和整流桥13完全相同。In addition, besides controlling the ignition angle of the rectifier bridge 13 , the control board 12 can also communicate with the rectifier bridge 13 , and the rectifier bridge 13 will send its working status information to the control board 12 . When the control board 12 detects that the rectifier bridge 13 fails, it will send a switching signal to the redundant control board 22 in the channel 20 . The connection between the control board 12 and the redundant control board 22 may be an electrical connection, a wireless connection, or an optical fiber connection. After the control board 12 sends a switching signal to the redundant control board 22, the redundant control board 22 and the redundant rectifier bridge 23 switch simultaneously, and the control board 12 and the rectifier bridge 13 stop working. The redundant control board 22 and the redundant rectifier bridge 13 respectively perform redundancy on the control board 12 and the rectifier bridge 13, so when switching to the channel 20, the working principle and signal transmission of the channel 20 and the channel 10 are exactly the same, that is The structures and functions of the redundant control board 22 and the redundant rectifier bridge 23 are exactly the same as those of the control board 12 and the rectifier bridge 13 .
本实施例提供的核电厂励磁系统的冗余结构中,对控制板卡12的输入输出信号回路16同样进行了冗余设置。如图1所示,输入输出信号回路16包括从采样端4连接至控制板12输入端的输入信号回路以及从控制板卡12输出端连接至控制信号接收端5的输出信号回路。而冗余信号回路26包括从采样端4连接至冗余控制板22输入端的冗余输入信号回路以及从冗余控制板22输出端连接至控制信号接收端5的冗余输出信号回路。在本发明提供的一个优选实施例中,输入信号包括来自控制室的增减磁、灭磁和手/自动选择开关的开关量信号以及参与励磁系统测量和控制用的发电机机端电压和机端电流的模拟量信号。输出信号包括至控制室的励磁调节器通道故障信号、限制器动作信号以及到电网的电力系统稳定器投入信号。In the redundant structure of the excitation system of the nuclear power plant provided in this embodiment, the input and output signal circuit 16 of the control board 12 is also redundantly set. As shown in FIG. 1 , the input and output signal circuit 16 includes an input signal circuit connected from the sampling terminal 4 to the input terminal of the control board 12 and an output signal circuit connected from the output terminal of the control board card 12 to the control signal receiving terminal 5 . The redundant signal circuit 26 includes a redundant input signal circuit connected from the sampling terminal 4 to the input terminal of the redundant control board 22 and a redundant output signal circuit connected from the output terminal of the redundant control board 22 to the control signal receiving terminal 5 . In a preferred embodiment provided by the present invention, the input signals include the switching value signals of the increase/decrease magnetization, demagnetization and manual/automatic selection switches from the control room, as well as the generator terminal voltage and machine voltage used for the measurement and control of the excitation system. Analog signal of terminal current. The output signals include the excitation regulator channel failure signal to the control room, the limiter action signal and the power system stabilizer input signal to the grid.
为了确保励磁系统的安全性,本实施例对控制板卡12的供电电源也进行了冗余配置,控制电源14和冗余控制电源24分别为控制板卡12和冗余控制板卡22供电,而且控制电源14与冗余控制电源24之间没有电的联系。In order to ensure the safety of the excitation system, redundant configuration is also performed on the power supply of the control board 12 in this embodiment, the control power supply 14 and the redundant control power supply 24 supply power to the control board 12 and the redundant control board 22 respectively, Moreover, there is no electrical connection between the control power source 14 and the redundant control power source 24 .
更进一步地,本实施例的跳闸回路15也进行了冗余设置,其冗余结构为冗余跳闸回路25。如图1所示,跳闸回路15和冗余跳闸回路25为灭磁开关2与发变组保护6之间的电路回路。跳闸回路15进一步包括从灭磁开关2至发变组保护6的灭磁开关端电路和从发变组保护6至灭磁开关2的发变组保护端电路。其中,灭磁开关端电路为灭磁开关2参与发变组保护逻辑的电路,其中包括参与发变组保护逻辑的接点;发变组保护端电路为发变组保护6使灭磁开关2跳闸的电路。在本实施例中,冗余跳闸回路分别对灭磁开关2参与发变组保护6逻辑的接点和发变组保护6使灭磁开关2跳闸的电路进行了冗余设置。Furthermore, the tripping circuit 15 of this embodiment is also provided with redundancy, and its redundant structure is a redundant tripping circuit 25 . As shown in FIG. 1 , the trip circuit 15 and the redundant trip circuit 25 are circuit circuits between the demagnetization switch 2 and the generator-transformer protection 6 . The trip circuit 15 further includes a de-excitation switch terminal circuit from the de-excitation switch 2 to the generator-transformer protection 6 and a generator-transformer protection terminal circuit from the de-excitation switch 6 to the de-excitation switch 2 . Among them, the circuit at the end of the demagnetization switch is the circuit where the demagnetization switch 2 participates in the protection logic of the generator-transformer group, including the contacts participating in the protection logic of the generator-transformer group; circuit. In this embodiment, the redundant tripping circuit is redundantly set up for the contacts where the de-excitation switch 2 participates in the logic of the generator-transformer group protection 6 and the circuit where the generator-transformer group protection 6 trips the de-excitation switch 2 .
应理解,本发明在冷备冗余设计方案上,从励磁系统整体出发,设计了冗余控制电源24、冗余信号回路26、冗余跳闸回路25和冗余整流桥23共四个冗余模块,充分保证了核电厂对励磁系统冗余的整体需求,具有更高的安全性和稳定性。本发明提供的两个励磁通,即道通道10和通道20的整流不存在电的联系,而且两个通道使用的控制板卡的供电电源,即冗余控制电源24与控制电源14之间也不存在电的联系,充分确保了电路的安全和稳定。另外,通过设计信号回路冗余设计,确保在单柜检修或通道切换过程中,任何操作和信号波动都不会对输入输出信号产生影响。在励磁系统中,由于灭磁开关2不能进行冗余设计,为了使励磁系统与继电保护严密配合,本发明通过对跳闸回路进行冗余设计,充分保证灭磁开关2与发变组保护6的密切配合,提高系统安全性。It should be understood that the present invention designs a total of four redundant control power sources 24, redundant signal circuits 26, redundant trip circuits 25 and redundant rectifier bridges 23 from the perspective of the excitation system as a whole in terms of the cold standby redundant design scheme. The module fully guarantees the overall requirement of the nuclear power plant for the redundancy of the excitation system, and has higher safety and stability. The two excitation fluxes provided by the present invention, that is, there is no electrical connection between the rectification of channel 10 and channel 20, and the power supply of the control board used by the two channels, that is, between the redundant control power supply 24 and the control power supply 14. There is no electrical connection, which fully ensures the safety and stability of the circuit. In addition, through the redundant design of the signal circuit, it is ensured that any operation and signal fluctuations will not affect the input and output signals during single cabinet maintenance or channel switching. In the excitation system, since the de-excitation switch 2 cannot be redundantly designed, in order to closely cooperate with the excitation system and the relay protection, the present invention fully guarantees the de-excitation switch 2 and the generator-transformer group protection 6 through redundant design of the trip circuit. The close cooperation of the system improves the security of the system.
请参见图2,图2是本发明提供的第二实施例核电厂励磁系统的冗余结构示意图。如图2所示,本实施例提供的电路回路包括3个主电流回路,其中回路60是发电回路,系统发电机71将产生的交流电经发电机主开关72和变压器73后送至电网。回路20和回路40是励磁回路,其中回路20为系统默认励磁回路,而回路40为冗余励磁回路。在回路20发生故障时,系统自动从回路20切换至回路40,从而保证励磁系统继续正常运行。在回路20中,副励磁机1产生的交流电经过灭磁开关Q01和回路20的交流侧开关Q20后输入到整流桥23中进行整流,进而从整流桥23的输出端输出直流电并通过直流侧开关Q22后输入到交流励磁机3的转子绕组31上,供交流励磁机3工作,交流励磁机3进一步连接至系统发电机71的转子绕组上,控制系统发电机71输出的无功功率。在回路40中,副励磁机1产生的交流电经过灭磁开关Q01和回路40的交流侧开关Q40后输入到整流桥43中进行整流,进而从整流桥43的输出端输出直流电并通过直流侧开关Q42后输入到交流励磁机3的转子绕组31上,供交流励磁机3工作,交流励磁机3进一步连接至系统发电机71转子绕组上,控制系统发电机71输出的无功功率。也就是说,通道20和通道40存在公共部分,即交流副励磁机1和灭磁开关Q01,交流副励磁机1产生的交流电通过灭磁开关Q01后从灭磁开关Q01的输出端同时连接至整流桥23和冗余整流桥43的输入端。Please refer to FIG. 2 . FIG. 2 is a schematic diagram of a redundant structure of an excitation system of a nuclear power plant according to a second embodiment of the present invention. As shown in FIG. 2 , the circuit loop provided by this embodiment includes three main current loops, among which the loop 60 is a power generation loop, and the system generator 71 sends the generated alternating current to the power grid through the generator main switch 72 and the transformer 73 . The loop 20 and the loop 40 are excitation loops, wherein the loop 20 is the default excitation loop of the system, and the loop 40 is the redundant excitation loop. When the circuit 20 fails, the system automatically switches from the circuit 20 to the circuit 40, so as to ensure that the excitation system continues to operate normally. In the circuit 20, the alternating current generated by the auxiliary exciter 1 is input to the rectifier bridge 23 for rectification after passing through the de-excitation switch Q01 and the AC side switch Q20 of the circuit 20, and then outputs direct current from the output end of the rectifier bridge 23 and passes through the DC side switch Q22 is then input to the rotor winding 31 of the AC exciter 3 for the AC exciter 3 to work. The AC exciter 3 is further connected to the rotor winding of the system generator 71 to control the reactive power output by the system generator 71. In the circuit 40, the alternating current generated by the auxiliary exciter 1 is input to the rectifier bridge 43 for rectification after passing through the de-excitation switch Q01 and the AC side switch Q40 of the circuit 40, and then outputs direct current from the output end of the rectifier bridge 43 and passes through the DC side switch Q42 is then input to the rotor winding 31 of the AC exciter 3 for the AC exciter 3 to work. The AC exciter 3 is further connected to the rotor winding of the system generator 71 to control the reactive power output by the system generator 71. That is to say, channel 20 and channel 40 have a common part, that is, AC auxiliary exciter 1 and de-excitation switch Q01. The AC power generated by AC auxiliary exciter 1 passes through de-excitation switch Q01 and is connected to Input terminals of rectifier bridge 23 and redundant rectifier bridge 43 .
控制板卡22通过检测整流桥23上的输入的交流电进而向整流桥23中的可控二极管发出控制信号,从而控制可控二极管的点弧角。另外,控制板卡22还能与整流桥23通信,整流桥23将其工作状态信息发送给控制板卡22,当控制板卡22检测到整流桥23故障时,会将切换信号发送至通道40中的冗余控制板42。控制板卡22与冗余控制板卡42之间的通信可以是通过电连接,也可以是无线连接,还可以是光纤连接。当控制板卡22向冗余控制板卡42发送切换信号后,冗余控制板卡42与冗余整流桥43同时切换,控制板卡22和整流桥23都停止工作。冗余控制板卡42和冗余整流桥43分别对控制板卡22和整流桥23进行冗余,因此当切换到通道40时,通道40和通道20的工作原理和信号传递完全相同,也就是说冗余控制板卡42和冗余整流桥43的结构和功能与控制板卡22和整流桥23完全相同。如图2所述,在本实施例中,控制板卡22与整流桥23同柜配置于柜100中,冗余控制板卡42与冗余整流桥43同柜配置于柜200中。The control board 22 sends a control signal to the controllable diode in the rectification bridge 23 by detecting the input alternating current on the rectification bridge 23 , so as to control the ignition angle of the controllable diode. In addition, the control board 22 can also communicate with the rectifier bridge 23, and the rectifier bridge 23 sends its working status information to the control board 22. When the control board 22 detects that the rectifier bridge 23 fails, it will send a switching signal to the channel 40 Redundant control board 42 in. The communication between the control board 22 and the redundant control board 42 may be through an electrical connection, a wireless connection, or an optical fiber connection. After the control board 22 sends a switching signal to the redundant control board 42, the redundant control board 42 and the redundant rectifier bridge 43 switch simultaneously, and both the control board 22 and the rectifier bridge 23 stop working. The redundant control board 42 and the redundant rectifier bridge 43 respectively perform redundancy on the control board 22 and the rectifier bridge 23, so when switching to the channel 40, the working principle and signal transmission of the channel 40 and the channel 20 are exactly the same, that is The structures and functions of the redundant control board 42 and the redundant rectifier bridge 43 are exactly the same as those of the control board 22 and the rectifier bridge 23 . As shown in FIG. 2 , in this embodiment, the control board 22 and the rectifier bridge 23 are configured in the cabinet 100 in the same cabinet, and the redundant control board 42 and the redundant rectifier bridge 43 are configured in the cabinet 200 in the same cabinet.
同时,本实施例提供的核电厂励磁系统的冗余结构中,对控制板卡22的输入输出信号回路同样进行了冗余设置。如图2所示,控制板卡22的输入信号包括来自控制室8的开关量信号以及参与励磁系统测量和控制用的系统发电机71的机端电压和机端电流的模拟量信号;而控制板卡22上的输出信号包括至控制室8的控制信号。在本发明提供的一个优选实施例中,来自控制室8的开关量信号包增减磁、灭磁和手/自动选择开关的开关量信号,而输入控制室8的信号包括励磁调节器通道故障信号、限制器动作信号以及到电网的电力系统稳定器投入信号。本实施例中,对系统发电机71机端电压和机端电流设置了采样点800,分别包括两个电压采样点和两个电流采样点,其中一个电压采样点的采样电压和一个电流采样点采样电流输入到控制板卡22的信号输入端,而另一个电压采样点的采样电压和另一个电流采样点采样电流输入到冗余控制板卡42的信号输入端。而控制板卡22和冗余控制板卡42的信号输出端并联后连接至控制室8的信号输入端。而控制室8的信号输出端则分别连接至控制板卡22和冗余控制板卡42的信号输入端。At the same time, in the redundant structure of the excitation system of the nuclear power plant provided by this embodiment, the input and output signal circuits of the control board 22 are also redundantly set. As shown in Figure 2, the input signal of control board 22 comprises the analog quantity signal of the machine terminal voltage and machine terminal current of the system generator 71 that participates in excitation system measurement and control usefulness from the switch signal of control room 8; Output signals on board 22 include control signals to control room 8 . In a preferred embodiment provided by the present invention, the switching value signals from the control room 8 include the switching value signals of the increase/decrease magnetization, de-excitation and manual/automatic selection switch, while the signals input into the control room 8 include excitation regulator channel faults signal, limiter action signal, and power system stabilizer input signal to the grid. In this embodiment, sampling points 800 are set for the machine terminal voltage and machine terminal current of the system generator 71, including two voltage sampling points and two current sampling points respectively, wherein the sampling voltage of one voltage sampling point and one current sampling point The sampling current is input to the signal input end of the control board 22 , and the sampling voltage of another voltage sampling point and the sampling current of another current sampling point are input to the signal input end of the redundant control board 42 . The signal output ends of the control board 22 and the redundant control board 42 are connected in parallel to the signal input end of the control room 8 . The signal output ends of the control room 8 are respectively connected to the signal input ends of the control board 22 and the redundant control board 42 .
如图2所示,本实施例还包括控制电源24和冗余控制电源44。控制电源24和冗余控制电源44分别用于为控制板卡22及冗余控制板卡42供电。控制电源24包括直流控制电源DC1和交流控制电源AC1,而冗余控制电源44包括冗余直流控制电源DC2和冗余交流控制电源AC2。交流控制电源AC1来自交流副励磁机1的输出端,经过熔断器F70后输入低压变压器T04后连接至控制电源24的输入端,冗余交流控制电源AC2来自交流副励磁机1的输出端,经过熔断器F71后输入低压变压器T05后连接至控制电源44的输入端。直流控制电源DC1的输出端直接连接至控制电源24的输入端,而冗余直流控制电源DC2的输出端直接连接至控制电源44的输入端。As shown in FIG. 2 , this embodiment also includes a control power supply 24 and a redundant control power supply 44 . The control power supply 24 and the redundant control power supply 44 are used to supply power to the control board 22 and the redundant control board 42 respectively. The control power supply 24 includes a DC control power supply DC1 and an AC control power supply AC1, and the redundant control power supply 44 includes a redundant DC control power supply DC2 and a redundant AC control power supply AC2. The AC control power supply AC1 comes from the output terminal of the AC sub-exciter 1, and is input to the low-voltage transformer T04 after passing through the fuse F70, and then connected to the input terminal of the control power supply 24. The redundant AC control power supply AC2 comes from the output terminal of the AC sub-exciter 1, and passes through The fuse F71 is input to the low-voltage transformer T05 and then connected to the input end of the control power supply 44 . The output end of the DC control power supply DC1 is directly connected to the input end of the control power supply 24 , and the output end of the redundant DC control power supply DC2 is directly connected to the input end of the control power supply 44 .
实施本实施例,有效地将控制板卡22与冗余控制板卡42的输入信号隔离开并进行冗余设置,同时也将为控制板卡22与冗余控制板卡42供电的控制电源24和冗余控制电源44的输入端隔离开来并进行冗余设置,充分保证了励磁系统的安全。Implement this embodiment, effectively isolate the input signals of the control board 22 and the redundant control board 42 and perform redundant settings, and also provide the control power supply 24 for the control board 22 and the redundant control board 42 It is isolated from the input end of the redundant control power supply 44 and is set redundantly, which fully guarantees the safety of the excitation system.
请参见图3,图3是本发明提供的第三实施例控制电源冗余结构示意图。如图3所示,本实施例提供的控制电源冗余结构包括两个直流电源DC1和DC2,一个产生交流电的隔离变压器400,开关1、2、3、4共四个开关,电源分配器18和冗余电源分配器28以及励磁系统600。直流电源DC1产生的直流电经开关1后输入电源分配器18的输入端,隔离变压器400产生的交流电经开关2后同样输入电源分配器18的输入端,电源分配器18的输出端连接至励磁系统600,进而为励磁系统600供电。而另一路冗余控制电源中,直流电源DC2产生的直流电经开关4后输入冗余电源分配器28的输入端,隔离变压器400产生的交流电经开关3后同样输入冗余电源分配器28的输入端,冗余电源分配器28的输出端连接至励磁系统600,进而为励磁系统供电。在励磁系统的等效电路中,电源分配器18和冗余电源分配器28之间连接两个背对背的二极管,确保电源分配器18和冗余电源分配器28之间无电连接。Please refer to FIG. 3 . FIG. 3 is a schematic diagram of a redundant control power supply structure according to a third embodiment of the present invention. As shown in Figure 3, the redundant control power supply structure provided by this embodiment includes two DC power supplies DC1 and DC2, an isolation transformer 400 for generating AC power, four switches 1, 2, 3, and 4 in total, and a power distributor 18 And redundant power distributor 28 and excitation system 600. The DC power generated by the DC power supply DC1 is input to the input terminal of the power distributor 18 after passing through the switch 1, the AC power generated by the isolation transformer 400 is also input to the input terminal of the power distributor 18 after passing through the switch 2, and the output terminal of the power distributor 18 is connected to the excitation system 600, and then supply power to the excitation system 600. In the other redundant control power supply, the DC power generated by the DC power supply DC2 is input to the input terminal of the redundant power distributor 28 after the switch 4, and the AC power generated by the isolation transformer 400 is also input to the input of the redundant power distributor 28 after the switch 3 The output end of the redundant power distributor 28 is connected to the excitation system 600, thereby supplying power to the excitation system. In the equivalent circuit of the excitation system, two back-to-back diodes are connected between the power distributor 18 and the redundant power distributor 28 to ensure that there is no electrical connection between the power distributor 18 and the redundant power distributor 28 .
通过实施本实施例,通过采用电源分配器18和冗余电源分配器28,不但对控制电源进行了冗余设置,而且使控制电源和冗余控制电源的输入端和输出端都进行了隔离,使其无电连接,充分保证了励磁系统的安全以及在故障情况下励磁系统的稳定运行。By implementing this embodiment, by adopting the power distributor 18 and the redundant power distributor 28, not only the control power supply is redundantly set, but also the input and output terminals of the control power supply and the redundant control power supply are isolated, It has no electrical connection, which fully guarantees the safety of the excitation system and the stable operation of the excitation system under fault conditions.
上述描述涉及各种模块。这些模块通常包括硬件和/或硬件与软件的组合(例如固化软件)。这些模块还可以包括包含指令(例如,软件指令)的计算机可读介质(例如,永久性介质),当处理器执行这些指令时,就可以执行本发明的各种功能性特点。相应地,除非明确要求,本发明的范围不受实施例中明确提到的模块中的特定硬件和/或软件特性的限制。作为非限制性例子,本发明在实施例中可以由一种或多种处理器(例如微处理器、数字信号处理器、基带处理器、微控制器)执行软件指令(例如存储在非永久性存储器和/或永久性存储器)。另外,本发明还可以用专用集成电路(ASIC)和/或其他硬件元件执行。需要指出的是,上文对各种模块的描述中,分割成这些模块,是为了说明清楚。然而,在实际实施中,各种模块的界限可以是模糊的。例如,本文中的任意或所有功能性模块可以共享各种硬件和/或软件元件。又例如,本文中的任何和/或所有功能模块可以由共有的处理器执行软件指令来全部或部分实施。另外,由一个或多个处理器执行的各种软件子模块可以在各种软件模块间共享。相应地,除非明确要求,本发明的范围不受各种硬件和/或软件元件间强制性界限的限制。The above description refers to various modules. These modules typically include hardware and/or a combination of hardware and software (eg, firmware). These modules may also include computer-readable media (eg, non-transitory media) containing instructions (eg, software instructions) that, when executed by a processor, perform various functional features of the present invention. Accordingly, the scope of the present invention is not limited by specific hardware and/or software characteristics in modules explicitly mentioned in the embodiments unless explicitly required. As a non-limiting example, in an embodiment of the present invention, one or more processors (such as microprocessors, digital signal processors, baseband processors, microcontrollers) execute software instructions (such as stored in non-permanent memory and/or permanent storage). Additionally, the present invention may also be implemented using Application Specific Integrated Circuits (ASICs) and/or other hardware components. It should be pointed out that, in the above description of various modules, the division into these modules is for the sake of clarity. However, in actual implementations, the boundaries of various modules can be blurred. For example, any or all of the functional modules herein may share various hardware and/or software elements. For another example, any and/or all functional modules herein may be fully or partially implemented by a shared processor executing software instructions. Additionally, various software sub-modules executed by one or more processors may be shared among the various software modules. Accordingly, the scope of the present invention should not be limited by mandatory boundaries between various hardware and/or software elements unless explicitly claimed.
以上所揭露的仅为本发明一种较佳实施例而已,当然不能以此来限定本发明之权利范围,本领域普通技术人员可以理解实现上述实施例的全部或部分流程,并依本发明权利要求所作的等同变化,仍属于发明所涵盖的范围。What is disclosed above is only a preferred embodiment of the present invention, and of course it cannot limit the scope of rights of the present invention. Those of ordinary skill in the art can understand all or part of the process for realizing the above embodiments, and according to the rights of the present invention The equivalent changes required still belong to the scope covered by the invention.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201410363292.5A CN105322853B (en) | 2014-07-28 | 2014-07-28 | A kind of redundancy structure of nuclear power plant's excitation system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201410363292.5A CN105322853B (en) | 2014-07-28 | 2014-07-28 | A kind of redundancy structure of nuclear power plant's excitation system |
Publications (2)
Publication Number | Publication Date |
---|---|
CN105322853A CN105322853A (en) | 2016-02-10 |
CN105322853B true CN105322853B (en) | 2018-01-23 |
Family
ID=55249600
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201410363292.5A Active CN105322853B (en) | 2014-07-28 | 2014-07-28 | A kind of redundancy structure of nuclear power plant's excitation system |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN105322853B (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106655744A (en) * | 2016-12-19 | 2017-05-10 | 南京南瑞继保电气有限公司 | Current limiting control method for rectifier bridges |
CN109150039B (en) * | 2018-10-19 | 2024-03-08 | 嘉陵江亭子口水利水电开发有限公司 | Excitation system and control method |
CN111596542B (en) * | 2020-05-26 | 2024-12-13 | 江苏核电有限公司 | An electric regulating valve driving device with redundant function and control method thereof |
CN111739669B (en) * | 2020-07-24 | 2022-02-01 | 中国核动力研究设计院 | Redundant excitation structure, system and method suitable for rod position detector of nuclear power station |
CN114665754A (en) * | 2022-02-23 | 2022-06-24 | 日照盈达气体有限公司 | A safe and stable synchronous motor excitation system and control method |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013141370A (en) * | 2012-01-06 | 2013-07-18 | Mitsubishi Electric Corp | Automatic generator voltage regulation apparatus |
CN103378783A (en) * | 2012-04-16 | 2013-10-30 | 台达电子企业管理(上海)有限公司 | Excitation control circuit, excitation control method, and electrical excitation wind power system of excitation control circuit |
CN203301132U (en) * | 2013-06-21 | 2013-11-20 | 湖南理昂再生能源电力有限公司 | Independent zero load overvoltage protector of automatic parallel excitation system of generator |
CN203522604U (en) * | 2013-09-24 | 2014-04-02 | 上海华菱电站成套设备有限公司 | Redundant medium-voltage AC-DC-AC frequency conversion device of double-winding synchronous motor of mine hoist |
-
2014
- 2014-07-28 CN CN201410363292.5A patent/CN105322853B/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013141370A (en) * | 2012-01-06 | 2013-07-18 | Mitsubishi Electric Corp | Automatic generator voltage regulation apparatus |
CN103378783A (en) * | 2012-04-16 | 2013-10-30 | 台达电子企业管理(上海)有限公司 | Excitation control circuit, excitation control method, and electrical excitation wind power system of excitation control circuit |
CN203301132U (en) * | 2013-06-21 | 2013-11-20 | 湖南理昂再生能源电力有限公司 | Independent zero load overvoltage protector of automatic parallel excitation system of generator |
CN203522604U (en) * | 2013-09-24 | 2014-04-02 | 上海华菱电站成套设备有限公司 | Redundant medium-voltage AC-DC-AC frequency conversion device of double-winding synchronous motor of mine hoist |
Non-Patent Citations (2)
Title |
---|
同步电动机励磁冗余控制系统的设计;张丽民 等;《船电技术》;20061215;第26卷(第6期);第13-15页 * |
浅析UNITROL6800励磁系统控制电源;杨维平;《水电厂自动化》;20130815;第34卷(第3期);第64-65页 * |
Also Published As
Publication number | Publication date |
---|---|
CN105322853A (en) | 2016-02-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US11355957B2 (en) | Isolated parallel UPS system with choke bypass switch | |
CN105322853B (en) | A kind of redundancy structure of nuclear power plant's excitation system | |
CN107819357B (en) | Isolated Parallel UPS System with Fault Location Detection | |
US9472981B2 (en) | Segment protected parallel bus | |
TW201438366A (en) | Highly reliable static switching switch circuit for uninterruptable power system | |
US10951057B1 (en) | Reliable power module for improved substation device availability | |
CN107465253B (en) | Spare power automatic switching action method automatically adapting to action of stability system | |
US20180034316A1 (en) | Device for commanding/controlling a source changeover switch | |
JP2014068504A (en) | Distribution panel and distributed power supply system | |
US11038336B1 (en) | Redundant power module and discharge circuit for improved substation device availability | |
KR20150013105A (en) | device of recovery for open-phase in the power system line | |
US12334775B2 (en) | Power supply system and control method | |
JP2015164374A (en) | Power supply system, power supply control apparatus, and power supply control method and program in power supply system | |
CN103943396A (en) | Circuit breaker operation loop | |
CN115280630A (en) | Conversion device, retrofit kit and method for supplying power to a load | |
CN104393671A (en) | Automatic switch realization method for standby power supply under small load | |
Apostolov et al. | An update to protection issues during system restoration | |
CN106849031A (en) | A kind of alternating current-direct current mixing micro-capacitance sensor coordinating protection coordinated scheme | |
RU187715U1 (en) | DEVICE FOR AUTOMATIC START-UP | |
RU148724U1 (en) | UNINTERRUPTIBLE POWER SUPPLY WITH AUTOMATIC START-UP OF BACK-UP POWER SUPPLY | |
WO2020121466A1 (en) | Power supply system and power supply method | |
RU108233U1 (en) | DEVICE FOR REDUCING CURRENT RISES WHEN TURNING ON THE TRANSFORMER | |
Anwar et al. | Soft restarting of industrial power network using inverter-controlled energy storage system | |
RU2678429C2 (en) | Method for inhibiting multiple converter stations into passive control mode in island state | |
CN113726000B (en) | Power supply device and power supply method thereof |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
GR01 | Patent grant | ||
GR01 | Patent grant |