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Research on Key Technology and Equipment of Distribution Static Synchronous Compensator

Author: OuJianBo
Tutor: LuoAn
School: Hunan University
Course: Control Theory and Control Engineering
Keywords: Distribution Static Synchronous Compensator Sorting control Reactive power compensation Negative sequence compensation dq transformation
CLC: TM761
Type: Master's thesis
Year: 2008
Downloads: 211
Quote: 6
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Abstract


The human society has entered the information age, as an information-based electricity supply with high reliability and high dynamic quality. Custom Power Technology is a new research field of power system is an effective means for the future to improve the distribution network power quality. Distribution static synchronous compensator (Distribution Static Synchronous Compensator, DSTATCOM) as an important parallel user power equipment, in theory, can be alternative to conventional voltage and reactive power control elements, with a powerful, fast response, distribution network reactive power compensation and power quality control one of the development at this stage. The paper based on the the DSTATCOM experimental platform developed DSTATCOM for load side reactive power and negative sequence current compensation control strategy, theories and key technologies of the detection and control methods were studied. Firstly binding the DSTATCOM the single-phase equivalent circuit, explains the basic principle of the DSTATCOM reactive power compensation. On this basis, the reactive power on the load side to achieve DSTATCOM and dynamic compensation of the negative sequence current target, the paper proposes a control method of sorting that reactive compensation on the load side and the negative sequence current compensation separately controlled positive sequence control ring for reactive power compensation on the load side, negative sequence control loop is used to realize the negative sequence current compensation on the load side. To achieve the goal of sub-sequence control, the need to accurately detect the compensation signal, thesis, dq coordinate transformation of the positive sequence the positive sequence fundamental reactive current is converted to a DC component in the coordinate system of the positive sequence dq; using the dq coordinate transformation of the negative sequence of the base wave negative sequence component is converted into two DC component in the dq coordinate system of the negative sequence. In order to verify the effectiveness of the sub-sequence control methods, the paper build a the DSTATCOM simulation model based MATLAB6.5 digital simulation. The simulation results show that the method based on the sub-sequence control DSTATCOM device can achieve dynamic reactive power on the load side and the negative sequence current compensation. Under the guidance of the theory and technology, the research team successfully developed based the a DSTATCOM experimental platform device of the the DSP controller TMS320LF2407A type ± 50kvar. Thesis on the DSTATCOM experimental platform, hardware and software design, detailed description and analysis of some important parameters, module design principle. Experimental platform was successfully developed, the Task Force on the experimental platform related experiments, the experimental results show that the theory and the technology is feasible and effective.

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CLC: > Industrial Technology > Electrotechnical > Transmission and distribution engineering, power network and power system > Power system automation > Automatically adjusts
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