To improve the switching behavior of insulated gate bipolar transistors (IGBTs), this article presents and analyzes an advanced novel and simple voltage-source gate driver for IGBTs. Its operating principle is described in detail first. Afterwards, the novel drive method is compared with other existing active gate drive methods (AGDs), both by theoretical analysis of operating principle. It is concluded that the presented driver can achieve much lower delays and losses than other drivers. The driver hardware configuration is then and by experimental results, the presented driver is compared with conventional gate drive (CGD) method. Thereafter, the presented driver is tested to verify its capability to independently adjust the concerned switching characteristics. This independent regulating capability can help improve certain switching characteristics with only small influence on the others, bringing an overall switching behavior optimization. Finally, the presented active gate driver improvements on electromagnetic interference (EMI) performance, implementation simplicity and its total costs are shown and analyzed to highlight its advantages and practicability. The presented driver is attractive for real engineering applications.
{"title":"An Advanced Self-Regulating Gate Driver for IGBTs","authors":"Yatao Ling, Zhengming Zhao, Yicheng Zhu, Bochen Shi, Liqiang Yuan, Kainan Chen","doi":"10.1109/HVDC50696.2020.9292837","DOIUrl":"https://doi.org/10.1109/HVDC50696.2020.9292837","url":null,"abstract":"To improve the switching behavior of insulated gate bipolar transistors (IGBTs), this article presents and analyzes an advanced novel and simple voltage-source gate driver for IGBTs. Its operating principle is described in detail first. Afterwards, the novel drive method is compared with other existing active gate drive methods (AGDs), both by theoretical analysis of operating principle. It is concluded that the presented driver can achieve much lower delays and losses than other drivers. The driver hardware configuration is then and by experimental results, the presented driver is compared with conventional gate drive (CGD) method. Thereafter, the presented driver is tested to verify its capability to independently adjust the concerned switching characteristics. This independent regulating capability can help improve certain switching characteristics with only small influence on the others, bringing an overall switching behavior optimization. Finally, the presented active gate driver improvements on electromagnetic interference (EMI) performance, implementation simplicity and its total costs are shown and analyzed to highlight its advantages and practicability. The presented driver is attractive for real engineering applications.","PeriodicalId":298807,"journal":{"name":"2020 4th International Conference on HVDC (HVDC)","volume":"322 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122708875","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-11-06DOI: 10.1109/HVDC50696.2020.9292817
Liu Cui, Xuehua Lin, Deyang Chen, Libin Huang, Qi Guo, Shuyong Li
The on-load tap changer(OLTC) is used in HVDC system to make sure the AC voltage or firing angle in an appropriate range. In recent years, after a number of onload tap-changer failures, many OLTCs of the same type were checked, and it was found that due to cracks and other conditions, the remaining action times of some still-operable OLTCs were far less than the theoretical action times. Due to production cycle and other reasons, defective components cannot be replaced in time. This requires that the DC system should be operated with a defective OLTCs. This article proposes several temporary operation measures: extend the interval between OLTC actions, adjust the OLTC control mode to Udi0, and avoid 70% voltage drop restart conditions. Using these temporary operation measures can effectively reduce the number of OLTC actions and extend its life, while ensuring the safe operation of the HVDC system. Simulation analysis proves the effectiveness of the scheme. This scheme has been implemented at the actual HVDC project site.
{"title":"Research on the HVDC Operation Mode with Defective On-Load Tap-Changer","authors":"Liu Cui, Xuehua Lin, Deyang Chen, Libin Huang, Qi Guo, Shuyong Li","doi":"10.1109/HVDC50696.2020.9292817","DOIUrl":"https://doi.org/10.1109/HVDC50696.2020.9292817","url":null,"abstract":"The on-load tap changer(OLTC) is used in HVDC system to make sure the AC voltage or firing angle in an appropriate range. In recent years, after a number of onload tap-changer failures, many OLTCs of the same type were checked, and it was found that due to cracks and other conditions, the remaining action times of some still-operable OLTCs were far less than the theoretical action times. Due to production cycle and other reasons, defective components cannot be replaced in time. This requires that the DC system should be operated with a defective OLTCs. This article proposes several temporary operation measures: extend the interval between OLTC actions, adjust the OLTC control mode to Udi0, and avoid 70% voltage drop restart conditions. Using these temporary operation measures can effectively reduce the number of OLTC actions and extend its life, while ensuring the safe operation of the HVDC system. Simulation analysis proves the effectiveness of the scheme. This scheme has been implemented at the actual HVDC project site.","PeriodicalId":298807,"journal":{"name":"2020 4th International Conference on HVDC (HVDC)","volume":"732 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124424814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-11-06DOI: 10.1109/HVDC50696.2020.9292828
Jiaqi Zhao, W. Lei, Gaotai Lv
Modular multilevel converter (MMC) has gradually become the preferred converter topology for high voltage direct current (HVDC) technology due to its clear advantages of low power consumption and modularity, its safe and reliable operation is of great significance to grid safety and energy utilization. Therefore, it is very important to model and analyze the system reliability of MMC. This paper firstly describes the commonly used system-level reliability modeling methods. Then on this basis, under the premise of considering the correlation between sub-modules, reliability analysis and modeling of several common sub-module topologies in modular multilevel converters are carried out. Finally, use actual engineering data as a reference to calculate the reliability of different topology systems and draw the three-dimensional curves of system reliability changes by using software programming. By comparing the results, the influence of the sub-module topology on the system reliability is analyzed, which provides a theoretical basis for the planning and design of actual projects.
{"title":"Reliability analysis of modular multilevel converter system under different submodule topologies","authors":"Jiaqi Zhao, W. Lei, Gaotai Lv","doi":"10.1109/HVDC50696.2020.9292828","DOIUrl":"https://doi.org/10.1109/HVDC50696.2020.9292828","url":null,"abstract":"Modular multilevel converter (MMC) has gradually become the preferred converter topology for high voltage direct current (HVDC) technology due to its clear advantages of low power consumption and modularity, its safe and reliable operation is of great significance to grid safety and energy utilization. Therefore, it is very important to model and analyze the system reliability of MMC. This paper firstly describes the commonly used system-level reliability modeling methods. Then on this basis, under the premise of considering the correlation between sub-modules, reliability analysis and modeling of several common sub-module topologies in modular multilevel converters are carried out. Finally, use actual engineering data as a reference to calculate the reliability of different topology systems and draw the three-dimensional curves of system reliability changes by using software programming. By comparing the results, the influence of the sub-module topology on the system reliability is analyzed, which provides a theoretical basis for the planning and design of actual projects.","PeriodicalId":298807,"journal":{"name":"2020 4th International Conference on HVDC (HVDC)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127657382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-11-06DOI: 10.1109/HVDC50696.2020.9292832
Zhao Yingfeng, Z. Xiang, Sun Jian, Zhang Zijing, Fang Taixun, Chen Chihan
The length of arrester is limited by the height of transport and the difficulty of assembly, so the arrester of ±1100kV UHVDC converter valve is designed as a two-sections arrester. The metal in the middle of the arrester cannot be equipotential with the valve tower. It is necessary to study the potential distribution characteristics of arrester metal, then to obtain the voltage difference between the arrester and the valve tower, which provides the basis for the design of air clear distance. According to the single valve withstand voltage requirements and non-uniform voltage coefficient. The air clear distance requirement between the valve tower and the metal at both ends of the arrester is calculated. The potential distribution characteristic of the intermediate metal and the voltage difference characteristic between the intermediate metal and the valve tower under different types of voltages are simulated. The maximum voltage difference and air clear distance requirement between the intermediate metal and the valve tower are calculated. Based on electric field simulation and single valve test, the safety of the design of air clear distance between the arrestor and the valve tower is verified.
{"title":"Design of Air Clear Distance between Two-Sections Arrester and Valve Tower of ±1100kV UHVDC Converter Valve","authors":"Zhao Yingfeng, Z. Xiang, Sun Jian, Zhang Zijing, Fang Taixun, Chen Chihan","doi":"10.1109/HVDC50696.2020.9292832","DOIUrl":"https://doi.org/10.1109/HVDC50696.2020.9292832","url":null,"abstract":"The length of arrester is limited by the height of transport and the difficulty of assembly, so the arrester of ±1100kV UHVDC converter valve is designed as a two-sections arrester. The metal in the middle of the arrester cannot be equipotential with the valve tower. It is necessary to study the potential distribution characteristics of arrester metal, then to obtain the voltage difference between the arrester and the valve tower, which provides the basis for the design of air clear distance. According to the single valve withstand voltage requirements and non-uniform voltage coefficient. The air clear distance requirement between the valve tower and the metal at both ends of the arrester is calculated. The potential distribution characteristic of the intermediate metal and the voltage difference characteristic between the intermediate metal and the valve tower under different types of voltages are simulated. The maximum voltage difference and air clear distance requirement between the intermediate metal and the valve tower are calculated. Based on electric field simulation and single valve test, the safety of the design of air clear distance between the arrestor and the valve tower is verified.","PeriodicalId":298807,"journal":{"name":"2020 4th International Conference on HVDC (HVDC)","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127711473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Commutation failure (CF) of one dc system may lead to the successive CF of the adjacent dc system due to the close electrical distance and reactive power interaction in multi-infeed HVDC systems, resulting in serious regional power loss. In order to effectively inhibit the successive CF and realize the orderly recovery, a coordinated recovery strategy based on additional current order is proposed in this paper. In this strategy, voltage at ac busbar of the inverter is used as a criterion of reactive power margin, and the corresponding additional current order is calculated according to the judgement of reactive power margin. Considering different strength of dc systems, the multi-infeed short circuit ratio (MISCR) is utilized to calculate the proportionality factor for current order correction. Finally, by the superposition of voltage dependent current order limiter (VDCOL) and the additional current order, the current setting value of rectifier side is obtained to realize the incremental recovery. The test system is built in PSCAD/EMTDC, and the simulation result verify the validation of the proposed strategy.
{"title":"Current Order Based Recovery Strategy for Successive Commutation Failure Inhibition in Multi-infeed HVDC Systems","authors":"Wenjia Zhang, Zhenjian Xie, Qun Zhang, Chenyi Zheng, Rui Gu, Yi Tang","doi":"10.1109/HVDC50696.2020.9292748","DOIUrl":"https://doi.org/10.1109/HVDC50696.2020.9292748","url":null,"abstract":"Commutation failure (CF) of one dc system may lead to the successive CF of the adjacent dc system due to the close electrical distance and reactive power interaction in multi-infeed HVDC systems, resulting in serious regional power loss. In order to effectively inhibit the successive CF and realize the orderly recovery, a coordinated recovery strategy based on additional current order is proposed in this paper. In this strategy, voltage at ac busbar of the inverter is used as a criterion of reactive power margin, and the corresponding additional current order is calculated according to the judgement of reactive power margin. Considering different strength of dc systems, the multi-infeed short circuit ratio (MISCR) is utilized to calculate the proportionality factor for current order correction. Finally, by the superposition of voltage dependent current order limiter (VDCOL) and the additional current order, the current setting value of rectifier side is obtained to realize the incremental recovery. The test system is built in PSCAD/EMTDC, and the simulation result verify the validation of the proposed strategy.","PeriodicalId":298807,"journal":{"name":"2020 4th International Conference on HVDC (HVDC)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127947226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-11-06DOI: 10.1109/HVDC50696.2020.9292884
Jilang Qiu, Yingjie He, Longyu Xu, Q. Jiao
In photovoltaic (PV) systems, transformerless three-level inverters have been widely used because of the simple structure and high efficiency. However, in addition to the inherent neutral-point voltage unbalance problem in three-level inverters, leakage current issues also should be carefully regulated in transformerless systems. But conventional common-mode voltage (CMV) reduction methods cannot well deal with the two problems. According to the principle of generation of leakage current, an improved large-medium-small-vector modulation (ILMSVM) method is proposed in this paper based on the LMP/NSVM method. Unlike conventional CMV suppression method, small vectors with high CMV are also used in the proposed method to control the neutral-point voltage while leakage current is well suppressed. Variation of CMV is kept within 1/6Udc in each switching cycle. And leakage current spikes are also avoided between the switching sequences. Compared with LMP/NSVM method, the neutralpoint voltage is adjusted faster and leakage current spikes is avoided in applying the ILMSVM method. Compared with conventional SVPWM method, ILMSVM method has little disadvantages in neutral point voltage control but can well suppress the leakage current. Effectiveness of the proposed method is verified by comparing the results with conventional SVPMW method and LMP/NSMV method in simulation.
{"title":"A Novel SVPWM Technique for Leakage Current Reduction and Neutral-Point Voltage Balance in Transformerless Three-Level Inverters","authors":"Jilang Qiu, Yingjie He, Longyu Xu, Q. Jiao","doi":"10.1109/HVDC50696.2020.9292884","DOIUrl":"https://doi.org/10.1109/HVDC50696.2020.9292884","url":null,"abstract":"In photovoltaic (PV) systems, transformerless three-level inverters have been widely used because of the simple structure and high efficiency. However, in addition to the inherent neutral-point voltage unbalance problem in three-level inverters, leakage current issues also should be carefully regulated in transformerless systems. But conventional common-mode voltage (CMV) reduction methods cannot well deal with the two problems. According to the principle of generation of leakage current, an improved large-medium-small-vector modulation (ILMSVM) method is proposed in this paper based on the LMP/NSVM method. Unlike conventional CMV suppression method, small vectors with high CMV are also used in the proposed method to control the neutral-point voltage while leakage current is well suppressed. Variation of CMV is kept within 1/6Udc in each switching cycle. And leakage current spikes are also avoided between the switching sequences. Compared with LMP/NSVM method, the neutralpoint voltage is adjusted faster and leakage current spikes is avoided in applying the ILMSVM method. Compared with conventional SVPWM method, ILMSVM method has little disadvantages in neutral point voltage control but can well suppress the leakage current. Effectiveness of the proposed method is verified by comparing the results with conventional SVPMW method and LMP/NSMV method in simulation.","PeriodicalId":298807,"journal":{"name":"2020 4th International Conference on HVDC (HVDC)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128507103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Static synchronous compensator (STATCOM), using cascaded H bridge (CHB) converter, is an attractive configuration for FACTS system, renewable energy integration, etc., functioning to compensate reactive power and to enhance power quality. However, conventional control methods (e.g., linear control with PI controllers and pulse width modulator (Cas-PI-PWM)) require a cascaded structure to realize the necessary current and voltage control targets, resulting high tuning efforts and relatively poor control dynamics. In this work we propose a computationally efficient model predictive control (MPC) solution for a 10-MVA STATCOM system with CHB topology, which has a very simple structure, scalable cost-function, and outperformed control dynamics in comparison with the conventional Cas-PI-PWM technique. Additionally, to cope with the weighting factor design difficulty, inherently with the classical MPC technique for multiple control-objective system, we utilize a two cost-function MPC structure. With this, the complex weighting factor design process has been simplified. Finally, offline simulation results confirm that the proposed solution outperforms the well-known Cas-PI-PWM technique, in terms of current tracking and capacitor voltage balancing, at difference testing scenarios.
{"title":"Efficient Two-Cost-Function Predictive Control for A 10-MVA Cascade H-Bridge STATCOM System","authors":"Xiaoqian Guo, Zhen Li, Zheng Dong, Yuanxiang Sun, Zhenkun Zhang, Zhenbin Zhang","doi":"10.1109/HVDC50696.2020.9292840","DOIUrl":"https://doi.org/10.1109/HVDC50696.2020.9292840","url":null,"abstract":"Static synchronous compensator (STATCOM), using cascaded H bridge (CHB) converter, is an attractive configuration for FACTS system, renewable energy integration, etc., functioning to compensate reactive power and to enhance power quality. However, conventional control methods (e.g., linear control with PI controllers and pulse width modulator (Cas-PI-PWM)) require a cascaded structure to realize the necessary current and voltage control targets, resulting high tuning efforts and relatively poor control dynamics. In this work we propose a computationally efficient model predictive control (MPC) solution for a 10-MVA STATCOM system with CHB topology, which has a very simple structure, scalable cost-function, and outperformed control dynamics in comparison with the conventional Cas-PI-PWM technique. Additionally, to cope with the weighting factor design difficulty, inherently with the classical MPC technique for multiple control-objective system, we utilize a two cost-function MPC structure. With this, the complex weighting factor design process has been simplified. Finally, offline simulation results confirm that the proposed solution outperforms the well-known Cas-PI-PWM technique, in terms of current tracking and capacitor voltage balancing, at difference testing scenarios.","PeriodicalId":298807,"journal":{"name":"2020 4th International Conference on HVDC (HVDC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116970390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-11-06DOI: 10.1109/HVDC50696.2020.9292773
Yan Li, Xin-shou Tian, Bin Yuan, Y. Chi, Guanglie Li, Ruanming Huang, Shuai Liang, Ting Huang, Mengyao Zhang
The transmission of offshore wind farms faces the problem of shortage of transmission corridor resources. It is necessary to consider how wind farm clusters are densely connected to the power grid. The design of the topology needs to be further optimized, and the power supply layout and grid structure need to be analyzed during the planning and construction period of the grid. Therefore, this paper analyzes the study requirement for the optimization of the topology of the offshore wind power AC / DC connect to grid. When the wind farm is close to the land and distributed, the AC integration can be used and the connect points are distributed in the power grid to reduce the impact of wind power fluctuations on the AC power grid.
{"title":"Study on Topology Structure Optimization Technology Requirements for Large-scale Offshore Wind Power Integration","authors":"Yan Li, Xin-shou Tian, Bin Yuan, Y. Chi, Guanglie Li, Ruanming Huang, Shuai Liang, Ting Huang, Mengyao Zhang","doi":"10.1109/HVDC50696.2020.9292773","DOIUrl":"https://doi.org/10.1109/HVDC50696.2020.9292773","url":null,"abstract":"The transmission of offshore wind farms faces the problem of shortage of transmission corridor resources. It is necessary to consider how wind farm clusters are densely connected to the power grid. The design of the topology needs to be further optimized, and the power supply layout and grid structure need to be analyzed during the planning and construction period of the grid. Therefore, this paper analyzes the study requirement for the optimization of the topology of the offshore wind power AC / DC connect to grid. When the wind farm is close to the land and distributed, the AC integration can be used and the connect points are distributed in the power grid to reduce the impact of wind power fluctuations on the AC power grid.","PeriodicalId":298807,"journal":{"name":"2020 4th International Conference on HVDC (HVDC)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117178133","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-11-06DOI: 10.1109/hvdc50696.2020.9292721
Z. Qiang, Jiang Xinhua, Zhao Liyun, Huang Dianlong, Wang Zhongying
Reactivepower control function is an important part of UHVDC transmission project, the purpose is to meet DC converter station reactive power demand, filtered AC side harmonics, and keeping the AC side bus voltage stability requirements. ± 800kV Pu' er converter station, which is a converter station of Yun-Guang II UHVDC transmission project, its reactive power control function of DC station control system has voltage effectiveness selection logic flaws, the paper proposes optimization measures, that will benefit for reliable operation of UHVDC transmission project.
{"title":"Optimization of Reactive Power Control Logic For UHVDC Transmission Project","authors":"Z. Qiang, Jiang Xinhua, Zhao Liyun, Huang Dianlong, Wang Zhongying","doi":"10.1109/hvdc50696.2020.9292721","DOIUrl":"https://doi.org/10.1109/hvdc50696.2020.9292721","url":null,"abstract":"Reactivepower control function is an important part of UHVDC transmission project, the purpose is to meet DC converter station reactive power demand, filtered AC side harmonics, and keeping the AC side bus voltage stability requirements. ± 800kV Pu' er converter station, which is a converter station of Yun-Guang II UHVDC transmission project, its reactive power control function of DC station control system has voltage effectiveness selection logic flaws, the paper proposes optimization measures, that will benefit for reliable operation of UHVDC transmission project.","PeriodicalId":298807,"journal":{"name":"2020 4th International Conference on HVDC (HVDC)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114336133","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-11-06DOI: 10.1109/HVDC50696.2020.9292741
Heng Wang, J. Przybilla, Hao Zhang, Juergen Schiele
In today's VSC-HVDC transmission lines, the Modular Multilevel Converter technology (MMC) becomes the mainstream as it decreases system complexity greatly. Recently Press Pack IGBT (PPI) has come into focus as a preferred realization for high power rating VSC-HVDC stations, it could offer the highest current rating IGBTs and advanced features in reliability. The paper introduces a new design of Press Pack IGBT with several innovative improvements, which are based on the application demands from VSC-HVDC systems. It is designed with hermetic sealed ceramic housing to avoid environmental erosion and could provide a robust feature of short circuit failure mode (SCFM) even enduring the discharge current from DC-link capacitor in case of arm short through. The PPI could be connected with an external Free-Wheeling Diodes (FWD), a higher current diode for the low side, to reduce the conduction loss and handle the surge current from the system and a lower current diode for high side to save cost. By that, customers are enabled to realize a cost-effective half-bridge stack by selecting different current rating devices in a sub-module design based on system requirements.
{"title":"The New High Reliable Press Pack IGBT for Modular Multilevel Converter in VSC-HVDC Applications","authors":"Heng Wang, J. Przybilla, Hao Zhang, Juergen Schiele","doi":"10.1109/HVDC50696.2020.9292741","DOIUrl":"https://doi.org/10.1109/HVDC50696.2020.9292741","url":null,"abstract":"In today's VSC-HVDC transmission lines, the Modular Multilevel Converter technology (MMC) becomes the mainstream as it decreases system complexity greatly. Recently Press Pack IGBT (PPI) has come into focus as a preferred realization for high power rating VSC-HVDC stations, it could offer the highest current rating IGBTs and advanced features in reliability. The paper introduces a new design of Press Pack IGBT with several innovative improvements, which are based on the application demands from VSC-HVDC systems. It is designed with hermetic sealed ceramic housing to avoid environmental erosion and could provide a robust feature of short circuit failure mode (SCFM) even enduring the discharge current from DC-link capacitor in case of arm short through. The PPI could be connected with an external Free-Wheeling Diodes (FWD), a higher current diode for the low side, to reduce the conduction loss and handle the surge current from the system and a lower current diode for high side to save cost. By that, customers are enabled to realize a cost-effective half-bridge stack by selecting different current rating devices in a sub-module design based on system requirements.","PeriodicalId":298807,"journal":{"name":"2020 4th International Conference on HVDC (HVDC)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114581228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：