Dissertation > Industrial Technology > Electrotechnical > Transmission and distribution engineering, power network and power system > Transmission and distribution technology > Transmission system > DC system power transmission

Research on Control Mode and Operating Characteristic of Novel HVDC Transmission System

Author FuYing
Tutor LuoLongFu
School Hunan University
Course Electrical Engineering
Keywords Coupled Compensated and Shielding Harmonic Pole control New DC transmission system Collaborative Control
CLC TM721.1
Type Master's thesis
Year 2008
Downloads 222
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The national grid interconnection is the inevitable trend of development of China's power grid . Building \State Grid Corporation of key construction of UHV power grid , the DC transmission suitable for long-range , high-capacity transmission of electricity , therefore UHV DC transmission will be widely used . The converter transformer is one of the most important equipment in the DC transmission system , auto compensation and harmonic shielding converter transformers advantages with traditional converter transformers are not available , has a very broad application prospects . The research in this paper is the use of the characteristics of this new type of converter transformers new DC transmission system control mode and run . This paper mainly include the following aspects: First, the principles and characteristics of the new converter transformer and its filter system , a brief analysis of Hunan University of transmission and distribution of new technologies related to research and development platform introduced . The new converter transformer unique auto- compensation and harmonic shielding function . Then , the study of the overall structure of the traditional HVDC control system , and the pole control systems focus the discussion . Principles and characteristics of the various controllers , and simulation , and analysis of the performance of various controllers disturbance when switching between controller actions and system stability , transient operating characteristics . Electromagnetic transient simulation tool PSCAD / EMTDC new HVDC transmission system model using the new converter transformer and its filter system , its operating characteristics under different failure modes , in order to verify the simulation model of rationality . Finally, synergetic control theory , and collaborative control strategy used in the new DC transmission system simulation model to analyze its operating characteristics in the case of start - up process , the DC current tuning value fluctuations , and the results with traditional PI control to illustrate the strategy better control effect .

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