Please wait, while we are loading the content...
| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Hui Liu Ke Ma Poh Chiang Loh Blaabjerg, F. |
| Copyright Year | 2015 |
| Description | Author affiliation: Dept. of Energy Technol., Aalborg Univ., Aalborg, Denmark (Hui Liu; Ke Ma; Poh Chiang Loh; Blaabjerg, F.) |
| Abstract | Modular multilevel converter (MMC) is an attractive choice for transformer-less and filter-less high power conversion system due to its ability to upscale to high voltage levels by the use of semiconductors. The capacitor voltages on each converter cell are important variables to be monitored not only for the proper control of MMC but also for the fault detection and protection. At the same time, a series of problems can arise by the use of a large number of sensors to measure the capacitor voltages such as high components counts, complex implementation, and comprised reliability of the MMC system. In order to decrease the number of sensors, lower the cost and improve the reliability, a state observer is proposed in this paper to estimate the capacitor voltages by the measurement of the output currents. First a state space model of the MMC system is developed, and then a closed-loop state observer is established to obtain the capacitor voltages. In this paper the observability of the MMC system is displayed and the calculation of the gain matrix is also described detailedly. No additional sensor is required by this technique and it can easily be implemented in a DSP or microcontroller. The operation and robustness of the proposed state observer are confirmed by the simulation results under different loading conditions, even under typical AC grid faults. |
| Starting Page | 1 |
| Ending Page | 6 |
| File Size | 846752 |
| Page Count | 6 |
| File Format | |
| e-ISBN | 9781479985869 |
| DOI | 10.1109/PEDG.2015.7223005 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2015-06-22 |
| Publisher Place | Germany |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Measurement Voltage measurement State observer Capacitor voltage Current measurement Capacitors Observers Modular multilevel converter Capacitive sensors Mathematical model |
| Content Type | Text |
| Resource Type | Article |
National Digital Library of India (NDLI) is a virtual repository of learning resources which is not just a repository with search/browse facilities but provides a host of services for the learner community. It is sponsored and mentored by Ministry of Education, Government of India, through its National Mission on Education through Information and Communication Technology (NMEICT). Filtered and federated searching is employed to facilitate focused searching so that learners can find the right resource with least effort and in minimum time. NDLI provides user group-specific services such as Examination Preparatory for School and College students and job aspirants. Services for Researchers and general learners are also provided. NDLI is designed to hold content of any language and provides interface support for 10 most widely used Indian languages. It is built to provide support for all academic levels including researchers and life-long learners, all disciplines, all popular forms of access devices and differently-abled learners. It is designed to enable people to learn and prepare from best practices from all over the world and to facilitate researchers to perform inter-linked exploration from multiple sources. It is developed, operated and maintained from Indian Institute of Technology Kharagpur.
Learn more about this project from here.
NDLI is a conglomeration of freely available or institutionally contributed or donated or publisher managed contents. Almost all these contents are hosted and accessed from respective sources. The responsibility for authenticity, relevance, completeness, accuracy, reliability and suitability of these contents rests with the respective organization and NDLI has no responsibility or liability for these. Every effort is made to keep the NDLI portal up and running smoothly unless there are some unavoidable technical issues.
Ministry of Education, through its National Mission on Education through Information and Communication Technology (NMEICT), has sponsored and funded the National Digital Library of India (NDLI) project.
| Sl. | Authority | Responsibilities | Communication Details |
|---|---|---|---|
| 1 | Ministry of Education (GoI), Department of Higher Education |
Sanctioning Authority | https://www.education.gov.in/ict-initiatives |
| 2 | Indian Institute of Technology Kharagpur | Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project | https://www.iitkgp.ac.in |
| 3 | National Digital Library of India Office, Indian Institute of Technology Kharagpur | The administrative and infrastructural headquarters of the project | Dr. B. Sutradhar bsutra@ndl.gov.in |
| 4 | Project PI / Joint PI | Principal Investigator and Joint Principal Investigators of the project |
Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon |
| 5 | Website/Portal (Helpdesk) | Queries regarding NDLI and its services | support@ndl.gov.in |
| 6 | Contents and Copyright Issues | Queries related to content curation and copyright issues | content@ndl.gov.in |
| 7 | National Digital Library of India Club (NDLI Club) | Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach | clubsupport@ndl.gov.in |
| 8 | Digital Preservation Centre (DPC) | Assistance with digitizing and archiving copyright-free printed books | dpc@ndl.gov.in |
| 9 | IDR Setup or Support | Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops | idr@ndl.gov.in |
|
Loading...
|