CN111579981B - A circuit and method for simulating the on-off voltage of a converter valve - Google Patents

A circuit and method for simulating the on-off voltage of a converter valve Download PDF

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CN111579981B
CN111579981B CN202010507794.6A CN202010507794A CN111579981B CN 111579981 B CN111579981 B CN 111579981B CN 202010507794 A CN202010507794 A CN 202010507794A CN 111579981 B CN111579981 B CN 111579981B
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capacitor
voltage
valve
tested
circuit
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CN111579981A (en
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杨俊�
张娟娟
高冲
盛财旺
周建辉
董巍
汪宇怀
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State Grid Zhejiang Electric Power Co Ltd
Global Energy Interconnection Research Institute
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State Grid Zhejiang Electric Power Co Ltd
Global Energy Interconnection Research Institute
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/327Testing of circuit interrupters, switches or circuit-breakers
    • G01R31/3271Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
    • G01R31/3272Apparatus, systems or circuits therefor

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  • Dc-Dc Converters (AREA)
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Abstract

The invention discloses a circuit and a method for simulating the turn-on and turn-off voltage of a converter valve, wherein the circuit comprises: the circuit comprises a thyristor, an inductor, a switch component, a first capacitor and a second capacitor, wherein the anode of the thyristor is externally connected with the anode of a direct-current power supply; the cathode of the thyristor is connected with one end of an inductor, and the other end of the inductor is respectively connected with one end of a switch component and one end of a second capacitor; the other end of the switch assembly is connected with one end of the first capacitor, and the switch assembly is used for controlling the first capacitor to be connected to or quit the circuit for simulating the on-off voltage of the converter valve; the other end of the first capacitor and the other end of the second capacitor are connected with the negative electrode of the direct-current power supply; the two ends of the second capacitor are externally connected with a valve test article to be tested. The invention can meet the output requirement that the on-voltage is different from the off-voltage when the simulation converter valve engineering actually operates, has simple circuit structure and lower cost, and is beneficial to the research on the on-off characteristics of the valve and the performance test and the optimized model selection of each component in the valve.

Description

一种模拟换流阀开通关断电压的电路、方法A circuit and method for simulating the on-off voltage of a converter valve

技术领域technical field

本发明涉及特高压换流阀运行试验领域,具体涉及一种模拟换流阀开通关断电压的电路、方法。The invention relates to the field of operation test of an ultra-high pressure converter valve, in particular to a circuit and a method for simulating the on-off voltage of a converter valve.

背景技术Background technique

现代大功率电力电子装置的核心器件是单、双向的特高压换流阀,特高压换流阀利用内部晶闸管的开关特性,完成其作为“高压开关”的功能,成为应用范围最广的电力电子器件。特高压换流阀的技术指标和技术水平在很大程度上决定了直流工程的技术指标和水平,因此需要对特高压换流阀进行电气性能测试。The core components of modern high-power power electronic devices are unidirectional and bidirectional UHV converter valves. UHV converter valves utilize the switching characteristics of internal thyristors to complete their functions as "high voltage switches" and become the most widely used power electronics. device. The technical indicators and technical level of the UHV converter valve largely determine the technical indicators and level of the DC project, so it is necessary to test the electrical performance of the UHV converter valve.

为验证特高压换流阀的运行性能,需要模拟工程实际中的电压波形,针对特高压换流阀的开通关断特性测试,重点是构造阀开通或者关断时的电压。目前主要的试验方法为合成全工况试验方法,又可细分为振荡升压和直流电流源复合试验方法、直接升压和直流电流源复合试验方法、振荡升压和交流电流源复合试验方法。特高压换流阀在工程实际运行中的开通电压是不同于关断电压的,但现有的合成全工况试验方法所利用的试验装置仅能输出大小相同的正反向电压,不能满足特高压换流阀的开通电压不同于关断电压的输出要求,即无法模拟出特高压换流阀在开通或者关断时的电压,进而无法对阀试品在工程运行条件下的开通关断特性进行测试。In order to verify the operating performance of the UHV converter valve, it is necessary to simulate the voltage waveform in actual engineering, and for the test of the on-off characteristics of the UHV converter valve, the focus is to construct the voltage when the valve is turned on or off. At present, the main test method is the synthetic full-condition test method, which can be further subdivided into the combined test method of oscillatory boost and DC current source, the combined test method of direct boost and DC current source, and the combined test method of oscillatory boost and AC current source . The turn-on voltage of the UHV converter valve in the actual operation of the project is different from the turn-off voltage, but the test device used in the existing synthetic full-condition test method can only output the forward and reverse voltages of the same magnitude, which cannot meet the requirements of special conditions. The turn-on voltage of the high-voltage converter valve is different from the output requirements of the turn-off voltage, that is, it is impossible to simulate the voltage of the UHV converter valve when it is turned on or off, and thus it is impossible to determine the turn-on and turn-off characteristics of the valve test product under engineering operating conditions. carry out testing.

发明内容SUMMARY OF THE INVENTION

因此,本发明要解决的技术问题在于克服现有技术中的试验装置无法模拟出特高压换流阀在开通或者关断时的电压,进而无法对阀试品在工程运行条件下的开通关断特性进行测试的缺陷,从而提供一种模拟换流阀开通关断电压的电路、方法。Therefore, the technical problem to be solved by the present invention is to overcome the fact that the test device in the prior art cannot simulate the voltage of the UHV converter valve when it is turned on or off, and thus cannot be used to turn on and off the valve test product under engineering operating conditions. Therefore, a circuit and method for simulating the on-off voltage of a converter valve are provided.

为达到上述目的,本发明提供如下技术方案:To achieve the above object, the present invention provides the following technical solutions:

第一方面,本发明实施例提供一种模拟换流阀开通关断电压的电路,包括:晶闸管、电感、开关组件、第一电容及第二电容,其中,所述晶闸管的阳极外接直流电源的正极;所述晶闸管的阴极与所述电感的一端连接,所述电感的另一端分别与所述开关组件的一端及所述第二电容的一端连接;所述开关组件的另一端与所述第一电容的一端连接,所述开关组件用于控制所述第一电容接入或退出所述模拟换流阀开通关断电压的电路;所述第一电容的另一端及所述第二电容的另一端与所述直流电源的负极连接;所述第二电容的两端外接待测阀试品。In a first aspect, an embodiment of the present invention provides a circuit for simulating the on-off voltage of a converter valve, including: a thyristor, an inductor, a switch component, a first capacitor and a second capacitor, wherein the anode of the thyristor is connected to an external DC power source. positive pole; the cathode of the thyristor is connected to one end of the inductor, and the other end of the inductor is connected to one end of the switch component and one end of the second capacitor respectively; the other end of the switch component is connected to the first One end of a capacitor is connected, and the switch component is used to control the first capacitor to access or exit the circuit that simulates the on-off voltage of the commutator valve; the other end of the first capacitor and the second capacitor The other end is connected to the negative pole of the DC power supply; the two ends of the second capacitor are outside the test valve sample.

在一实施例中,所述开关组件包括:第一开关组件和第二开关组件,所述第一开关组件与所述第二开关组件串联。In one embodiment, the switch assembly includes a first switch assembly and a second switch assembly, the first switch assembly is connected in series with the second switch assembly.

在一实施例中,所述第一开关组件和第二开关组件均包括:一个或多个压装单元,所述压装单元包括:IGBT器件及与所述IGBT器件反向并联的二极管,且所述第一开关组件中IGBT器件与所述第二开关组件中IGBT器件的导通电流方向相反。In one embodiment, the first switch assembly and the second switch assembly each include: one or more press-fit units, the press-fit units include: an IGBT device and a diode in anti-parallel with the IGBT device, and The on-current directions of the IGBT devices in the first switch assembly and the IGBT devices in the second switch assembly are opposite.

在一实施例中,当所述压装单元为多个时,各所述压装单元串联连接。In one embodiment, when there are multiple press-fitting units, each of the press-fitting units is connected in series.

第二方面,本发明实施例提供一种模拟换流阀开通关断电压的方法,应用于本发明实施例第一方面所述的模拟换流阀开通关断电压的电路,包括:将待测阀试品接入所述模拟换流阀开通关断电压的电路;触发所述晶闸管开通,控制所述开关组件将所述第一电容接入所述模拟换流阀开通关断电压的电路,外接直流电源为所述第一电容及所述第二电容充电至所述待测阀试品的预设开通电压时,触发所述晶闸管关断;所述待测阀试品的开通过程:控制所述开关组件动作,触发所述待测阀试品开通,使得所述第一电容和所述第二电容同时向待测阀试品放电;所述待测阀试品的关断过程:通过所述开关组件控制所述第一电容退出所述模拟换流阀开通关断电压的电路的时间,以使所述待测阀试品对所述第二电容反向充电至所述待测阀试品的预设关断电压时,触发所述待测阀试品关断。In a second aspect, an embodiment of the present invention provides a method for simulating the on-off voltage of a converter valve, which is applied to the circuit for simulating the on-off voltage of a converter valve described in the first aspect of the embodiment of the present invention, including: The valve test product is connected to the circuit that simulates the on-off voltage of the converter valve; the thyristor is triggered to turn on, and the switch assembly is controlled to connect the first capacitor to the circuit that simulates the on-off voltage of the converter valve, When the external DC power supply charges the first capacitor and the second capacitor to the preset turn-on voltage of the valve test product to be tested, the thyristor is triggered to turn off; the turn-on process of the valve test product to be tested: control The action of the switch assembly triggers the opening of the valve sample to be tested, so that the first capacitor and the second capacitor discharge to the valve sample to be tested at the same time; the shut-off process of the valve sample to be tested: through The switch component controls the time when the first capacitor exits the circuit that simulates the on-off voltage of the converter valve, so that the valve test product to be tested reversely charges the second capacitor to the valve to be tested When the preset cut-off voltage of the test product is reached, the test product of the valve to be tested is triggered to be turned off.

在一实施例中,还包括:当所述待测阀试品关断后,通过控制所述开关组件将所述第一电容与所述第二电容恢复至初始电压水平。In one embodiment, the method further includes: after the valve sample to be tested is turned off, controlling the switch component to restore the first capacitor and the second capacitor to an initial voltage level.

本发明技术方案,具有如下优点:The technical scheme of the present invention has the following advantages:

本发明提供的模拟换流阀开通关断电压的电路,利用晶闸管、电感、开关组件、第一电容及第二电容构建一种模拟换流阀开通关断电压的电路,通过控制开关组件的时序,进而控制第一电容接入或退出模拟换流阀开通关断电压的电路的时间,从而模拟出换流阀的开通或者关断电压,且开通电压不同于关断电压,进而满足了换流阀的开通电压不同于关断电压的输出要求。该模拟换流阀开通关断电压的电路结构简单,成本较低,可在试验条件下模拟阀工程实际运行的开通关断过程,在换流阀两端产生工程运行时的开通以及关断电压,并且可满足整流侧及逆变侧的开通关断电压要求,对阀开通关断特性的研究以及阀内各元器件的性能测试和优化选型具有重要意义。The circuit for simulating the on-off voltage of a converter valve provided by the present invention utilizes a thyristor, an inductor, a switch component, a first capacitor and a second capacitor to construct a circuit for simulating the on-off voltage of the converter valve, and controls the sequence of the switch components by constructing a circuit for simulating the on-off voltage of the converter valve , and then control the time when the first capacitor is connected to or exits the circuit that simulates the turn-on and turn-off voltage of the converter valve, so as to simulate the turn-on or turn-off voltage of the converter valve, and the turn-on voltage is different from the turn-off voltage, thereby satisfying the commutation valve. The turn-on voltage of the valve is different from the output requirement of the turn-off voltage. The circuit for simulating the turn-on and turn-off voltage of the converter valve is simple in structure and low in cost, and can simulate the turn-on and turn-off process of the actual operation of the valve project under test conditions, and the turn-on and turn-off voltages during the project operation are generated at both ends of the converter valve. , and can meet the turn-on and turn-off voltage requirements of the rectifier side and the inverter side. It is of great significance to the research of the valve turn-off and turn-off characteristics, as well as the performance test and optimization of the various components in the valve.

本发明提供的模拟换流阀开通关断电压的方法,通过将待测阀试品接入模拟换流阀开通关断电压的电路,控制开关组件的时序,进而控制第一电容接入或退出模拟换流阀开通关断电压的电路的时间,从而模拟出换流阀的开通或者关断电压,且开通电压不同于关断电压。进而满足了换流阀的开通电压不同于关断电压的输出要求。该测试电源产生方法所利用的模拟换流阀开通关断电压的电路结构简单,成本较低,可在试验条件下模拟阀工程实际运行的开通关断过程,在换流阀两端产生工程运行时的开通以及关断电压,并且可满足整流侧及逆变侧的开通关断电压要求,对阀开通关断特性的研究以及阀内各元器件的性能测试和优化选型具有重要意义。The method for simulating the on-off voltage of the converter valve provided by the present invention controls the sequence of the switch components by connecting the test valve sample to be tested to the circuit for simulating the on-off voltage of the converter valve, and then controls the first capacitor to be connected or withdrawn. Simulate the time when the converter valve turns on and off the voltage circuit, so as to simulate the turn-on or turn-off voltage of the converter valve, and the turn-on voltage is different from the turn-off voltage. This further satisfies the output requirement that the on-voltage of the converter valve is different from the off-voltage. The circuit for simulating the on-off voltage of the converter valve used in the test power generation method is simple in structure and low in cost, and can simulate the on-off process of the actual operation of the valve engineering under the test conditions, and generate engineering operation at both ends of the converter valve. It can meet the on-off voltage requirements of the rectifier side and the inverter side, which is of great significance to the research of the valve on-off characteristics, the performance test and the optimization of the valve components.

附图说明Description of drawings

为了更清楚地说明本发明具体实施方式或现有技术中的技术方案,下面将对具体实施方式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,下面描述中的附图是本发明的一些实施方式,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 illustrate the specific embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the specific embodiments or the prior art. Obviously, the accompanying drawings in the following description The drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

图1为本发明实施例中模拟换流阀开通关断电压的电路的一个具体示例的电路图;FIG. 1 is a circuit diagram of a specific example of a circuit for simulating an on-off voltage of a converter valve in an embodiment of the present invention;

图2为本发明实施例中模拟换流阀开通关断电压的电路的压装单元多级串联结构示意图;2 is a schematic diagram of a multi-stage series structure of a press-fitting unit of a circuit simulating the on-off voltage of a converter valve in an embodiment of the present invention;

图3为本发明实施例中模拟换流阀开通关断电压的电路的另一个具体示例的电路图;3 is a circuit diagram of another specific example of a circuit for simulating an on-off voltage of a converter valve in an embodiment of the present invention;

图4为本发明实施例中模拟换流阀开通关断电压的方法的电源控制时序图。FIG. 4 is a power control sequence diagram of a method for simulating an on-off voltage of a converter valve according to an embodiment of the present invention.

具体实施方式Detailed ways

下面将结合附图对本发明的技术方案进行清楚、完整地描述,显然,所描述的实施例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 technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

在本发明的描述中,需要说明的是,术语“中心”、“上”、“下”、“左”、“右”、“竖直”、“水平”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系,仅是为了便于描述本发明和简化描述,而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作,因此不能理解为对本发明的限制。此外,术语“第一”、“第二”、“第三”仅用于描述目的,而不能理解为指示或暗示相对重要性。In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

在本发明的描述中,需要说明的是,除非另有明确的规定和限定,术语“安装”、“相连”、“连接”应做广义理解,例如,可以是固定连接,也可以是可拆卸连接,或一体地连接;可以是机械连接,也可以是电连接;可以是直接相连,也可以通过中间媒介间接相连,还可以是两个元件内部的连通,可以是无线连接,也可以是有线连接。对于本领域的普通技术人员而言,可以具体情况理解上述术语在本发明中的具体含义。In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection connection, or integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two components, which can be a wireless connection or a wired connection connect. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

此外,下面所描述的本发明不同实施方式中所涉及的技术特征只要彼此之间未构成冲突就可以相互结合。In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

本发明实施例提供一种模拟换流阀开通关断电压的电路,如图1所示,包括:晶闸管T1、电感L、开关组件K、第一电容C1及第二电容C2,其中,晶闸管T1的阳极外接直流电源DC的正极;晶闸管T1的阴极与电感L的一端连接,电感L的另一端分别与开关组件K的一端及第二电容C2的一端连接;开关组件K的另一端与第一电容C1的一端连接,开关组件K用于控制第一电容C1接入或退出模拟换流阀开通关断电压的电路;第一电容C1的另一端及第二电容C2的另一端与直流电源DC的负极连接;第二电容C2的两端外接待测阀试品P。An embodiment of the present invention provides a circuit for simulating the on-off voltage of a converter valve, as shown in FIG. 1 , including: a thyristor T1, an inductor L, a switch component K, a first capacitor C1 and a second capacitor C2, wherein the thyristor T1 The anode of the thyristor is connected to the positive pole of the DC power supply DC; the cathode of the thyristor T1 is connected to one end of the inductance L, and the other end of the inductance L is connected to one end of the switch component K and one end of the second capacitor C2 respectively; the other end of the switch component K is connected to the first One end of the capacitor C1 is connected, and the switch component K is used to control the first capacitor C1 to access or exit the circuit that simulates the on-off voltage of the converter valve; the other end of the first capacitor C1 and the other end of the second capacitor C2 are connected to the DC power supply DC The negative pole of the second capacitor C2 is connected to the test valve sample P outside the two ends of the second capacitor C2.

本发明提供的模拟换流阀开通关断电压的电路,利用晶闸管、电感、开关组件、第一电容及第二电容构建一种模拟换流阀开通关断电压的电路,通过控制开关组件的时序,进而控制第一电容接入或退出模拟换流阀开通关断电压的电路的时间,从而模拟出换流阀的开通或者关断电压,且开通电压不同于关断电压,进而满足了换流阀的开通电压不同于关断电压的输出要求。该模拟换流阀开通关断电压的电路结构简单,成本较低,可在试验条件下模拟阀工程实际运行的开通关断过程,在换流阀两端产生工程运行时的开通以及关断电压,并且可满足整流侧及逆变侧的开通关断电压要求,对阀开通关断特性的研究以及阀内各元器件的性能测试和优化选型具有重要意义。The circuit for simulating the on-off voltage of a converter valve provided by the present invention utilizes a thyristor, an inductor, a switch component, a first capacitor and a second capacitor to construct a circuit for simulating the on-off voltage of the converter valve, and controls the sequence of the switch components by constructing a circuit for simulating the on-off voltage of the converter valve , and then control the time when the first capacitor is connected to or exits the circuit that simulates the turn-on and turn-off voltage of the converter valve, so as to simulate the turn-on or turn-off voltage of the converter valve, and the turn-on voltage is different from the turn-off voltage, thereby satisfying the commutation valve. The turn-on voltage of the valve is different from the output requirement of the turn-off voltage. The circuit for simulating the turn-on and turn-off voltage of the converter valve is simple in structure and low in cost, and can simulate the turn-on and turn-off process of the actual operation of the valve project under test conditions, and the turn-on and turn-off voltages during the project operation are generated at both ends of the converter valve. , and can meet the turn-on and turn-off voltage requirements of the rectifier side and the inverter side. It is of great significance to the research of the valve turn-off and turn-off characteristics, as well as the performance test and optimization of the various components in the valve.

本发明实施例中,如图2所示,开关组件K包括:第一开关组件K1和第二开关组件K2,第一开关组件K1与第二开关组件K2串联。其中第一开关组件K1和第二开关组件K2均包括:多个压装单元M,每一个压装单元M由IGBT器件及与IGBT器件反向并联的二极管构成,且第一开关组件K1中IGBT器件与第二开关组件K2中IGBT器件的导通电流方向相反。当压装单元M为多个时,各压装单元M串联连接。当待测阀试品P要求不同等级的开通或者关断电压时,可以增加或者减小压装单元M的级数。通过调整IGBT与二极管并联单元的串联级数满足不同电压等级的试验要求,需要说明的是,如图2所示的实施例是以第一开关组件K1及第二开关组件K2中的压装单元M均为多个为例进行的示例性说明,在实际应用中,第一开关组件K1及第二开关组件K2中压装单元M也可以只有一个,本发明并不以此为限。In the embodiment of the present invention, as shown in FIG. 2 , the switch assembly K includes: a first switch assembly K1 and a second switch assembly K2, and the first switch assembly K1 is connected in series with the second switch assembly K2. The first switch assembly K1 and the second switch assembly K2 both include: a plurality of press-fitting units M, each press-fitting unit M is composed of an IGBT device and a diode connected in anti-parallel with the IGBT device, and the IGBT in the first switch assembly K1 The on-current direction of the device is opposite to that of the IGBT device in the second switch assembly K2. When there are a plurality of press-fitting units M, the respective press-fitting units M are connected in series. When the valve test product P to be tested requires different levels of turn-on or turn-off voltages, the number of stages of the press-fitting unit M can be increased or decreased. By adjusting the series number of IGBT and diode parallel units to meet the test requirements of different voltage levels, it should be noted that the embodiment shown in FIG. 2 is a press-fit unit in the first switch assembly K1 and the second switch assembly K2 Each of M is an exemplary illustration for an example. In practical applications, there may be only one press-fitting unit M in the first switch assembly K1 and the second switch assembly K2, and the present invention is not limited to this.

本发明实施例中,如图3所示,具体以第一开关组件K1和第二开关组件K2均包括一个压装单元M为例进行说明。该模拟换流阀开通关断电压的电路,包括:晶闸管T1、电感L、第一压装单元M1、第二压装单元M2、第一电容C1及第二电容C2,其中,晶闸管T1的阳极外接直流电源DC的正极;晶闸管T1的阴极与电感L的一端连接,电感L的另一端分别与第一压装单元M1的一端及第二电容C2的一端连接;第一压装单元M1的另一端与第二压装单元M2的一端连接,第二压装单元M2的另一端与第一电容C1的一端连接;第一电容C1的另一端及第二电容C2的另一端与直流电源DC的负极连接;第二电容C2的两端外接待测阀试品P。In the embodiment of the present invention, as shown in FIG. 3 , the first switch assembly K1 and the second switch assembly K2 each include a press-fitting unit M as an example for description. The circuit for simulating the on-off voltage of the converter valve includes: a thyristor T1, an inductor L, a first pressing unit M1, a second pressing unit M2, a first capacitor C1 and a second capacitor C2, wherein the anode of the thyristor T1 The positive pole of the external DC power supply DC; the cathode of the thyristor T1 is connected to one end of the inductance L, and the other end of the inductance L is respectively connected to one end of the first press-fitting unit M1 and one end of the second capacitor C2; the other end of the first press-fitting unit M1 is connected. One end is connected to one end of the second press-fitting unit M2, and the other end of the second press-fitting unit M2 is connected to one end of the first capacitor C1; the other end of the first capacitor C1 and the other end of the second capacitor C2 are connected to the DC power supply DC. The negative pole is connected; the two ends of the second capacitor C2 receive the test valve sample P.

第一压装单元M1包括:第一IGBT器件G1及与第一IGBT器件G1反向并联的二极管D1,第二压装单元M2包括:第二IGBT器件G2及与第二IGBT器件G2反向并联的二极管D2,且第一压装单元M1中第一IGBT器件G1与第二压装单元M2中第二IGBT器件G2的导通电流方向相反。第一压装单元M1与第二压装单元M2串联,用于控制第一电容C1接入或退出模拟换流阀开通关断电压的电路。The first press-fitting unit M1 includes a first IGBT device G1 and a diode D1 connected in anti-parallel with the first IGBT device G1, and the second press-fitting unit M2 includes: a second IGBT device G2 and an anti-parallel connection with the second IGBT device G2 diode D2, and the on-current directions of the first IGBT device G1 in the first pressing unit M1 and the second IGBT device G2 in the second pressing unit M2 are opposite. The first press-fitting unit M1 is connected in series with the second press-fitting unit M2, and is used to control the first capacitor C1 to be connected or withdrawn from the circuit that simulates the on-off voltage of the converter valve.

本发明实施例还提供一种模拟换流阀开通关断电压的方法,应用于如图3所示的模拟换流阀开通关断电压的电路,包括如下时序步骤:An embodiment of the present invention also provides a method for simulating the on-off voltage of a converter valve, which is applied to the circuit for simulating the on-off voltage of a converter valve as shown in FIG. 3 , and includes the following sequence steps:

步骤S1:将待测阀试品P接入模拟换流阀开通关断电压的电路。Step S1: Connect the valve sample P to be tested to a circuit that simulates the on-off voltage of the converter valve.

步骤S2:触发晶闸管T1开通,控制第二IGBT器件G2导通,将第一电容C1接入模拟换流阀开通关断电压的电路,外接直流电源DC为第一电容C1及第二电容C2充电至待测阀试品P的预设开通电压时,触发晶闸管T1及第二IGBT器件G2关断。Step S2: Trigger the thyristor T1 to turn on, control the second IGBT device G2 to turn on, connect the first capacitor C1 to the circuit that simulates the on-off voltage of the commutator valve, and connect the external DC power supply DC to charge the first capacitor C1 and the second capacitor C2 When the preset turn-on voltage of the valve test product P to be tested is reached, the thyristor T1 and the second IGBT device G2 are triggered to turn off.

步骤S3:待测阀试品P的开通过程:控制第一IGBT器件G1导通,触发待测阀试品P开通,使得所述第一电容C1和所述第二电容C2同时向待测阀试品P放电;Step S3: the opening process of the valve test product P to be tested: controlling the first IGBT device G1 to be turned on, triggering the opening of the valve test product P to be tested, so that the first capacitor C1 and the second capacitor C2 are simultaneously connected to the valve to be tested. Test sample P discharges;

步骤S4:待测阀试品P的关断过程:通过控制第一IGBT器件G1关断时间,将第一电容C1退出模拟换流阀开通关断电压的电路,以使待测阀试品P对第二电容C2反向充电至待测阀试品P的预设关断电压时,触发待测阀试品P关断。Step S4: the shut-off process of the valve test product P to be tested: by controlling the turn-off time of the first IGBT device G1, the first capacitor C1 is withdrawn from the circuit that simulates the on-off voltage of the converter valve, so that the valve test product P to be tested is turned off. When the second capacitor C2 is reversely charged to the preset cutoff voltage of the valve test sample P to be tested, the valve test sample P to be tested is triggered to be turned off.

本发明实施例中,通过将待测阀试品P的两端与第二电容C2的两端连接,待测阀试品P接入模拟换流阀开通关断电压的电路。In the embodiment of the present invention, by connecting both ends of the valve sample P to be tested with both ends of the second capacitor C2, the valve sample P to be tested is connected to a circuit that simulates the on-off voltage of the converter valve.

设待测阀试品P开通电压为U1,关断电压为U2。电路运行时序如图4所示,电源输出电压包括正向的第一电容C1电压和负向的第二电容C2电压。t0时刻开始为预充电过程:晶闸管T1及第二IGBT器件G2导通,控制第一电容C1接入模拟换流阀开通关断电压的电路,由于电感L、第一电容C1及第二电容C2共同确定了充电时间,外接直流电源DC为第一电容C1及第二电容C2充电至待测阀试品P的预设开通电压U1,充电完成后晶闸管T1及第二IGBT器件G2关断。在其他实施例中,根据待测阀试品P开通电压等级,选用不同电压等级直流电源DC。Assume that the open voltage of the valve test product P to be tested is U1, and the cut-off voltage is U2. The circuit operation sequence is shown in FIG. 4 , and the output voltage of the power supply includes the voltage of the first capacitor C1 in the positive direction and the voltage of the second capacitor C2 in the negative direction. The pre-charging process starts at time t0 : the thyristor T1 and the second IGBT device G2 are turned on, and the first capacitor C1 is controlled to be connected to the circuit that simulates the on-off voltage of the commutator valve. C2 jointly determines the charging time. The external DC power supply DC charges the first capacitor C1 and the second capacitor C2 to the preset turn-on voltage U1 of the valve test product P to be tested. After the charging is completed, the thyristor T1 and the second IGBT device G2 are turned off. In other embodiments, according to the turn-on voltage level of the valve test product P to be tested, DC power sources DC of different voltage levels are selected.

t1时刻,待测阀试品P及第一IGBT器件G1同时开通,控制第一电容C1和第二电容C2同时向待测阀试品P放电,由于第一电容C1与第二电容C2预充电电压为U1,恰为待测阀试品P开通时刻电压,从而等效了待测阀试品P的开通过程。At time t1 , the valve sample P to be tested and the first IGBT device G1 are turned on at the same time, and the first capacitor C1 and the second capacitor C2 are controlled to discharge the valve sample P to be tested at the same time. The charging voltage is U1, which is exactly the voltage at the time of opening of the valve sample P to be tested, which is equivalent to the opening process of the valve sample P to be tested.

待测阀试品P及第一IGBT器件G1开通后,由于待测阀试品P中元件多为感性负载,第一电容C1和第二电容C2向感性负载谐振放电,谐振状态下,当待测阀试品P的试品电流达到峰值时,第一电容C1和第二电容C2的电容电压降为零,随后待测阀试品P中电流逐渐减小,第一电容C1和第二电容C2开始接受待测阀试品P的反向充电。After the valve test product P to be tested and the first IGBT device G1 are turned on, since most of the components in the valve test product P to be tested are inductive loads, the first capacitor C1 and the second capacitor C2 resonately discharge to the inductive load. When the current of the test valve test product P reaches the peak value, the capacitance voltage of the first capacitor C1 and the second capacitor C2 drops to zero, and then the current in the test valve test product P to be tested gradually decreases, and the first capacitor C1 and the second capacitor C1 and the second capacitor C2 begins to receive reverse charging of the valve sample P to be tested.

控制第一IGBT器件G1的关断时间以使得第一电容C1退出电路,待测阀试品P继续对第二电容C2充电,以使待测阀试品P对第二电容C2反向充电至待测阀试品P的预设关断电压,当待测阀试品P的试品电流逐渐减小至零,t2时刻待测阀试品P关断,第二电容C2的电压恰为待测阀试品P的关断电压,从而等效了待测阀试品P的关断过程。Control the turn-off time of the first IGBT device G1 so that the first capacitor C1 exits the circuit, and the valve test product P to be tested continues to charge the second capacitor C2, so that the valve test product P to be tested reversely charges the second capacitor C2 to The preset cut-off voltage of the valve test product P to be tested, when the test product current of the test valve test product P to be tested gradually decreases to zero, the test product P of the test valve to be tested is turned off at time t2 , and the voltage of the second capacitor C2 is just The shut-off voltage of the valve test product P to be tested is equivalent to the shut-off process of the valve test product P to be tested.

由于开通过程,第一电容C1和第二电容C2同时向待测阀试品P放电,阀试品开通时刻电压为U1,而关断过程,第二电容C2的电压恰为试品的关断电压U2。C1+C2≠C2,因此开通电压U1≠关断电压U2,从而满足了换流阀的开通电压不同于关断电压的输出要求。Due to the turn-on process, the first capacitor C1 and the second capacitor C2 simultaneously discharge the valve test product P to be tested, and the voltage of the valve test product is U1 when the valve test product is turned on, and during the turn-off process, the voltage of the second capacitor C2 is just the turn-off of the test product. voltage U2. C1+C2≠C2, so turn-on voltage U1≠turn-off voltage U2, thus satisfying the output requirement that the turn-on voltage of the converter valve is different from the turn-off voltage.

本发明实施例中,当待测阀试品P关断后,通过控制开关组件K(即控制第一IGBT器件G1及第二IGBT器件G2的通断)的时序将第一电容C1与第二电容C2的电压恢复初始电压水平,为下个周期做准备。In the embodiment of the present invention, after the valve test product P to be tested is turned off, the first capacitor C1 and the second The voltage on capacitor C2 returns to the initial voltage level in preparation for the next cycle.

本发明提供的模拟换流阀开通关断电压的方法,利用构建的模拟换流阀开通关断电压的电路,通过控制开关组件的时序,进而控制第一电容接入或退出模拟换流阀开通关断电压的电路的时间,在开通过程,第一电容和第二电容同时向待测阀试品放电,即阀试品开通时刻电压,而关断过程,第二电容的电压恰为试品的关断电压,从而模拟出换流阀的开通或者关断电压,且开通电压不同于关断电压,从而满足了换流阀的开通电压不同于关断电压的输出要求。该测试电源产生方法所利用的模拟换流阀开通关断电压的电路结构简单,成本较低,可在试验条件下模拟阀工程实际运行的开通关断过程,在换流阀两端产生工程运行时的开通以及关断电压,并且可满足整流侧及逆变侧的开通关断电压要求,对阀开通关断特性的研究以及阀内各元器件的性能测试和优化选型具有重要意义。The method for simulating the on-off voltage of the converter valve provided by the present invention utilizes the constructed circuit for simulating the on-off voltage of the converter valve, and controls the sequence of the switch components to control the first capacitor to connect or exit the analog converter valve on-off. The time when the circuit of the voltage is turned off. During the turn-on process, the first capacitor and the second capacitor discharge simultaneously to the valve sample to be tested, that is, the voltage of the valve sample when it is turned on, and during the turn-off process, the voltage of the second capacitor is just the sample. The turn-on voltage of the converter valve is simulated, and the turn-on voltage is different from the turn-off voltage, thus satisfying the output requirement that the turn-on voltage of the converter valve is different from the turn-off voltage. The circuit for simulating the on-off voltage of the converter valve used in the test power generation method is simple in structure and low in cost, and can simulate the on-off process of the actual operation of the valve engineering under the test conditions, and generate engineering operation at both ends of the converter valve. It can meet the on-off voltage requirements of the rectifier side and the inverter side, which is of great significance to the research of the valve on-off characteristics, the performance test and the optimization of the valve components.

显然,上述实施例仅仅是为清楚地说明所作的举例,而并非对实施方式的限定。对于所属领域的普通技术人员来说,在上述说明的基础上还可以做出其它不同形式的变化或变动。这里无需也无法对所有的实施方式予以穷举。而由此所引申出的显而易见的变化或变动仍处于本发明创造的保护范围之中。Obviously, the above-mentioned embodiments are only examples for clear description, and are not intended to limit the implementation manner. For those of ordinary skill in the art, changes or modifications in other different forms can also be made on the basis of the above description. There is no need and cannot be exhaustive of all implementations here. However, the obvious changes or changes derived from this are still within the protection scope of the present invention.

Claims (4)

1.一种模拟换流阀开通关断电压的电路,其特征在于,包括:晶闸管、电感、开关组件、第一电容及第二电容,其中,1. A circuit for simulating the on-off voltage of a converter valve, characterized in that it comprises: a thyristor, an inductor, a switch component, a first capacitor and a second capacitor, wherein, 所述晶闸管的阳极外接直流电源的正极;The anode of the thyristor is connected to the anode of the DC power supply; 所述晶闸管的阴极与所述电感的一端连接,所述电感的另一端分别与所述开关组件的一端及所述第二电容的一端连接;The cathode of the thyristor is connected to one end of the inductor, and the other end of the inductor is respectively connected to one end of the switch component and one end of the second capacitor; 所述开关组件的另一端与所述第一电容的一端连接,所述开关组件用于控制所述第一电容接入或退出所述模拟换流阀开通关断电压的电路;The other end of the switch component is connected to one end of the first capacitor, and the switch component is used to control the first capacitor to be connected to or withdrawn from the circuit that simulates the on-off voltage of the converter valve; 所述第一电容的另一端及所述第二电容的另一端与所述直流电源的负极连接;The other end of the first capacitor and the other end of the second capacitor are connected to the negative electrode of the DC power supply; 所述第二电容的两端外接待测阀试品;Both ends of the second capacitor receive the test valve sample; 所述开关组件包括:第一开关组件和第二开关组件,所述第一开关组件与所述第二开关组件串联;The switch assembly includes: a first switch assembly and a second switch assembly, the first switch assembly is connected in series with the second switch assembly; 所述第一开关组件和第二开关组件均包括:一个或多个压装单元,所述压装单元包括:IGBT器件及与所述IGBT器件反向并联的二极管,且所述第一开关组件中IGBT器件与所述第二开关组件中IGBT器件的导通电流方向相反。The first switch assembly and the second switch assembly each include: one or more press-fit units, the press-fit units include: an IGBT device and a diode in anti-parallel with the IGBT device, and the first switch assembly The on-current directions of the middle IGBT device and the IGBT device in the second switch assembly are opposite. 2.根据权利要求1所述的模拟换流阀开通关断电压的电路,其特征在于,当所述压装单元为多个时,各所述压装单元串联连接。2 . The circuit for simulating the on-off voltage of a converter valve according to claim 1 , wherein when there are multiple press-fitting units, each of the press-fitting units is connected in series. 3 . 3.一种模拟换流阀开通关断电压的方法,应用于如权利要求1-2任一所述的模拟换流阀开通关断电压的电路,其特征在于,包括:3. A method for simulating the on-off voltage of a converter valve, applied to the circuit for simulating the on-off voltage of a converter valve as described in any one of claims 1-2, characterized in that, comprising: 将待测阀试品接入所述模拟换流阀开通关断电压的电路;Connect the valve test product to be tested to the circuit that simulates the on-off voltage of the converter valve; 触发所述晶闸管开通,控制所述开关组件将所述第一电容接入所述模拟换流阀开通关断电压的电路,外接直流电源为所述第一电容及所述第二电容充电至所述待测阀试品的预设开通电压时,触发所述晶闸管关断;Trigger the thyristor to turn on, control the switch component to connect the first capacitor to the circuit that simulates the on-off voltage of the commutator valve, and charge the first capacitor and the second capacitor to the voltage of the external DC power supply. Trigger the thyristor to turn off when the preset turn-on voltage of the valve test product to be tested is activated; 所述待测阀试品的开通过程:控制所述开关组件动作,触发所述待测阀试品开通,使得所述第一电容和所述第二电容同时向待测阀试品放电;The opening process of the valve sample to be tested: controlling the action of the switch assembly to trigger the opening of the valve sample to be tested, so that the first capacitor and the second capacitor discharge simultaneously to the valve sample to be tested; 所述待测阀试品的关断过程:通过所述开关组件控制所述第一电容退出所述模拟换流阀开通关断电压的电路的时间,以使所述待测阀试品对所述第二电容反向充电至所述待测阀试品的预设关断电压时,触发所述待测阀试品关断。The shut-off process of the valve sample to be tested: the time when the first capacitor exits the circuit that simulates the on-off voltage of the converter valve is controlled by the switch component, so that the valve sample to be tested can be connected to all the samples. When the second capacitor is reversely charged to the preset cutoff voltage of the valve test sample to be tested, the valve test sample to be tested is triggered to be turned off. 4.根据权利要求3所述的模拟换流阀开通关断电压的方法,其特征在于,还包括:当所述待测阀试品关断后,通过控制所述开关组件将所述第一电容与所述第二电容恢复至初始电压水平。4 . The method for simulating the on-off voltage of a converter valve according to claim 3 , further comprising: after the valve sample to be tested is turned off, by controlling the switch assembly to switch the first The capacitor and the second capacitor are restored to the original voltage level.
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