CN207753632U - A kind of intersection clamp modularization multi-level converter based on IGCT - Google Patents

Abstract

Translated fromChinese

一种基于IGCT的交叉箝位模块化多电平换流器，包括多个换流桥臂，每个所述换流桥臂包括n个SM模块和m个ICM模块，n≥1，n>m≥1，n，m为正整数，其中ICM模块包括二极管D1、二极管D2和一个开关管S1，所述开关管S1由IGCT或ETO构成。本实用新型的交叉箝位模块化多电平换流器MMC的运行损耗较小。

An IGCT-based cross-clamped modular multilevel converter, including multiple converter bridge arms, each of which includes n SM modules and m ICM modules, n≥1, n> m≧1, n, m is a positive integer, wherein the ICM module includes a diode D1, a diode D2 and a switching tube S1, and the switching tube S1 is composed of IGCT or ETO. The operating loss of the cross-clamp modular multilevel converter MMC of the utility model is relatively small.

Description

Translated fromChinese

一种基于IGCT的交叉箝位模块化多电平换流器A Cross-Clamped Modular Multilevel Converter Based on IGCT

技术领域technical field

本实用新型属于电气自动化领域，涉及到多电平换流器，特别涉及一种基于IGCT的交叉箝位模块化多电平换流器。The utility model belongs to the field of electric automation and relates to a multilevel converter, in particular to an IGCT-based cross-clamp modular multilevel converter.

背景技术Background technique

模块化多电平换流器(Modular Multilevel Converter,MMC)是一种不需要变压器而实现高、中压电力转换的多级转换器，由多个结构相同的子模块(Sub-module,SM)级联构成。子模块的结构可以分为半H桥型、全H桥型和箝位双子模块型等。相比传统直流输电系统使用的两电平与三电平换流器，MMC采用子模块级联避免了开关管的直接串联，提高换流器的可靠性。模块化多电平换流器MMC已经展现出极其重要的工程应用前景。Modular Multilevel Converter (MMC) is a multilevel converter that realizes high-voltage and medium-voltage power conversion without a transformer. It consists of multiple sub-modules (SM) with the same structure. cascading composition. The structure of the sub-module can be divided into half H-bridge type, full H-bridge type and clamped twin sub-module type, etc. Compared with the two-level and three-level converters used in traditional DC transmission systems, MMC uses sub-module cascading to avoid direct series connection of switching tubes and improve the reliability of the converter. Modular multilevel converter MMC has shown extremely important engineering application prospects.

然而，现有MMC的拓扑结构基础器件使用的基本都是绝缘栅双极型晶体管(Insulated gate bipolar transistor,简称IGBT)器件，由于IGBT器件通态压降高，导致通态损耗大，因此，现有MMC的运行损耗比较高，有待进一步改进。However, the topological basic devices of the existing MMC basically use insulated gate bipolar transistor (IGBT for short) devices. Due to the high on-state voltage drop of the IGBT device, the on-state loss is large. Therefore, the current The operating loss of MMC is relatively high, which needs to be further improved.

实用新型内容Utility model content

解决现有技术方案的缺陷与不足，本实用新型提出一种基于IGCT的交叉箝位模块化多电平换流器MMC，其主要核心点在于ICM中的开关管S1由IGCT构成，由于IGCT的通态压降很低，所以能够减小MMC的运行损耗。To solve the defects and deficiencies of the existing technical solutions, the utility model proposes an IGCT-based cross-clamp modular multilevel converter MMC, the main core point of which is that the switch tube S1 in the ICM is composed of an IGCT. The on-state voltage drop is very low, so the operating loss of the MMC can be reduced.

技术方案如下：The technical scheme is as follows:

一种交叉箝位模块化多电平换流器，包括多个换流桥臂，每个所述换流桥臂包括n个SM模块和m个ICM模块，n≥1，n>m≥1，n，m为正整数；A cross-clamped modular multilevel converter, including a plurality of converter bridge arms, each of which includes n SM modules and m ICM modules, n≥1, n>m≥1 , n, m are positive integers;

所述ICM模块包括二极管D1、二极管D2和一个开关管S1；The ICM module includes a diode D1, a diode D2 and a switch S1;

所述开关管S1由IGCT构成；The switch tube S1 is composed of an IGCT;

其中所述ICM模块与两个SM模块SM1，SM2电耦接；所述二极管D2的负极与所述SM模块SM1的电容正极电耦接；所述二极管D2的正极与所述SM模块SM2的电容负极电耦接；所述二极管D1的负极与所述开关管S1的阳极和所述SM模块SM2的电容正极电耦接；所述二极管D2的正极与所述开关管S1的负极和所述SM模块SM1的电容负极电耦接；Wherein the ICM module is electrically coupled with two SM modules SM1 and SM2; the negative pole of the diode D2 is electrically coupled with the positive pole of the capacitor of the SM module SM1; the positive pole of the diode D2 is electrically coupled with the capacitor of the SM module SM2 The negative pole is electrically coupled; the negative pole of the diode D1 is electrically coupled to the anode of the switching tube S1 and the positive pole of the capacitor of the SM module SM2; the positive pole of the diode D2 is connected to the negative pole of the switching tube S1 and the SM module The negative electrode of the capacitor of the module SM1 is electrically coupled;

其中所述SM模块形成半桥电路；Wherein the SM module forms a half-bridge circuit;

其中所述换流桥臂中的所述SM模块和所述ICM模块串联耦接；Wherein the SM module and the ICM module in the converter bridge arm are coupled in series;

其中所述开关管S1还可以由ETO构成；Wherein the switch tube S1 can also be composed of ETO;

采用上述技术方案，本实用新型的有益效果在于：Adopt above-mentioned technical scheme, the beneficial effect of the utility model is:

由于IGCT的通态压降很低，进而能够减小本实用新型交叉箝位模块化多电平换流器MMC的运行损耗。Since the on-state voltage drop of the IGCT is very low, the operating loss of the cross-clamp modular multilevel converter MMC of the present invention can be reduced.

附图说明Description of drawings

图1是本实用新型MMC系统结构图。Fig. 1 is a structural diagram of the utility model MMC system.

图2是本实用新型MMC子模块结构图。Fig. 2 is a structural diagram of the MMC sub-module of the utility model.

具体实施方式Detailed ways

结合本实用新型的技术方案和附图进一步叙述本实用新型的具体实施例。The specific embodiment of the utility model is further described in conjunction with the technical scheme of the utility model and the accompanying drawings.

本实用新型的基于IGCT的交叉箝位模块化多电平换流器MMC，如图1所示，包括多个换流桥臂，当MMC为三相系统时，换流桥臂一般为6个，当MMC为单相系统时一般为4个，换流桥臂的数量依据设计而定不限于此；每个换流桥臂包含n个SM模块和m个ICM模块，n≥1，n>m≥1；SM模块形成半桥电路；如图2所示，ICM模块包括2个二极管D1、D2和1个开关管S1；ICM模块与两个SM模块SM1，SM2电耦接，ICM模块中二极管D2的负极与模块SM1的电容正极电耦接，ICM模块中二极管D2的正极与模块SM2的电容负极电耦接，ICM模块中二极管D1的负极与S1的阳极和模块SM2的电容正极电耦接，ICM模块中二极管D2的正极与S1的负极和模块SM1的电容负极电耦接。The IGCT-based cross-clamp modular multilevel converter MMC of the present invention, as shown in Figure 1, includes multiple converter bridge arms. When the MMC is a three-phase system, there are generally 6 converter bridge arms. , when the MMC is a single-phase system, it is generally 4. The number of converter bridge arms is not limited to this according to the design; each converter bridge arm contains n SM modules and m ICM modules, n≥1, n> m≥1; the SM module forms a half-bridge circuit; as shown in Figure 2, the ICM module includes two diodes D1, D2 and a switch tube S1; the ICM module is electrically coupled with two SM modules SM1 and SM2, and the ICM module The cathode of the diode D2 is electrically coupled to the positive electrode of the capacitor of the module SM1, the anode of the diode D2 in the ICM module is electrically coupled to the negative electrode of the capacitor of the module SM2, and the cathode of the diode D1 in the ICM module is electrically coupled to the anode of S1 and the positive electrode of the capacitor of the module SM2 The anode of the diode D2 in the ICM module is electrically coupled to the cathode of S1 and the cathode of the capacitor of the module SM1.

其中，ICM中开关管S1由IGCT或ETO构成，以减小换流器的运行损耗。Wherein, the switching tube S1 in the ICM is composed of IGCT or ETO, so as to reduce the operating loss of the converter.

本实用新型的交叉箝位模块化多电平换流器MMC，其中ICM的开关管S1由IGCT或ETO构成，由此减小交叉箝位模块化多电平换流器MMC的运行损耗。In the cross-clamp modular multilevel converter MMC of the present invention, the switching tube S1 of the ICM is composed of IGCT or ETO, thereby reducing the operating loss of the cross-clamp modular multi-level converter MMC.

尽管根据上述实施例描述了本实用新型，但所属技术领域的技术人员应该理解，可以在所附权利要求的精神和范围内通过修改实现本实用新型。所有这些变化和修改都旨在落入所附权利要求的范围内。因此，示例和附图被视为是示例性的而非限制性的。Although the present invention has been described in terms of the above embodiments, those skilled in the art will appreciate that the present invention can be practiced with modifications within the spirit and scope of the appended claims. All such changes and modifications are intended to come within the scope of the appended claims. Accordingly, the examples and figures are to be regarded as illustrative and not restrictive.

Claims (5)

Translated fromChinese

1.一种基于IGCT的交叉箝位模块化多电平换流器，包括多个换流桥臂，每个所述换流桥臂包括n个SM模块和m个ICM模块，n≥1，n>m≥1，n，m为正整数；其特征在于：1. A cross-clamped modular multilevel converter based on IGCT, comprising a plurality of converter bridge arms, each of which includes n SM modules and m ICM modules, n≥1, n>m≥1, n, m are positive integers; it is characterized in that:所述ICM模块包括二极管D1、二极管D2和开关管S1；The ICM module includes a diode D1, a diode D2 and a switch S1;所述开关管S1由IGCT构成。The switch tube S1 is composed of an IGCT.2.如权利要求1所述的一种基于IGCT的交叉箝位模块化多电平换流器，其中所述ICM模块与两个SM模块SM1，SM2电耦接；所述二极管D2的负极与所述SM模块SM1的电容正极电耦接；所述二极管D2的正极与所述SM模块SM2的电容负极电耦接；所述二极管D1的负极与所述开关管S1的阳极和所述SM模块SM2的电容正极电耦接；所述二极管D2的正极与所述开关管S1的负极和所述SM模块SM1的电容负极电耦接。2. A kind of IGCT-based cross clamping modular multilevel converter as claimed in claim 1, wherein said ICM module is electrically coupled with two SM modules SM1, SM2; the cathode of said diode D2 is connected to The anode of the capacitor of the SM module SM1 is electrically coupled; the anode of the diode D2 is electrically coupled to the cathode of the capacitor of the SM module SM2; the cathode of the diode D1 is connected to the anode of the switching tube S1 and the SM module The anode of the capacitor of SM2 is electrically coupled; the anode of the diode D2 is electrically coupled to the cathode of the switching tube S1 and the cathode of the capacitor of the SM module SM1.3.如权利要求1所述的一种基于IGCT的交叉箝位模块化多电平换流器，其中所述SM模块形成半桥电路。3. An IGCT-based cross-clamped modular multilevel converter according to claim 1, wherein said SM modules form a half-bridge circuit.4.如权利要求1所述的一种基于IGCT的交叉箝位模块化多电平换流器，其中所述换流桥臂中的所述SM模块和所述ICM模块串联耦接。4. The IGCT-based cross-clamped modular multilevel converter according to claim 1, wherein the SM module and the ICM module in the converter bridge arm are coupled in series.5.如权利要求1所述的一种基于IGCT的交叉箝位模块化多电平换流器，其中所述开关管S1由ETO构成。5. The IGCT-based cross-clamped modular multilevel converter according to claim 1, wherein the switching tube S1 is composed of ETO.