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Research Of The Grid Computing And Parallel Technology Based Dynamic Security Assessment Of Power Systems

Posted on:2012-04-23Degree:MasterType:Thesis
Country:ChinaCandidate:H DuFull Text:PDF
GTID:2212330362959153Subject:Power system and its automation
Abstract/Summary:PDF Full Text Request
As the nerve center of interconnection grid, smart security assessment is a unified key element of a strong power grid, which is the basis for the maintenance of power production process and the way to protect power grid operation and development. With the parallel computing technology and grid computing technology in China's power system widely used, making use of these information for intelligent security assessment system research and design work possible. The main results of this thesis are shown below.1. In modern multi-core computers, data exchange between different cores can be realized more easily with reliable high bandwidth and low-latency communication due to the architecture of shared memory and cache, thus forming a native parallel computing environment. Since the transient stability analysis of power systems involves much computing time, this paper focuses on the parallel algorithm and design for transient stability analysis and presents an improved algorithm suitable for implementation in the multi-core computer. To maximize the efficiency of parallel computing, OpenMP is adopted to transform most of the computing work into parallel computing. The results show that, compared to traditional parallel technology, parallel algorithm based on multi-core processor achieved apparent improvements in computation.2. For modern multi-core CPU and GPU features, a research is made on power system transient stability analysis and its parallel algorithm. Considering the sparse feature of power network grid and Compute Unified Device Architecture technology, a method of power system transient stability heterogeneous parallel algorithm based on CPU network grid partition and calculation dispatch, together with GPU fine-grained parallelism is proposed. Make special optimization for sparse matrix dispose. For test, 3000-bus and 1256-bus power system is used, and through numerical simulation the proposed algorithm has been compared with the other transient stability analysis program. The proposed algorithm has good convergence rate, and high speedup ratio and parallel calculation efficiency can be obtained. A mixed parallel method based on OpenMP and CUDA for multi-GPU system is also proposed, which helps to expand the applied range of heterogeneous parallel algorithm.3. For the actual characteristics of Shanghai power grid, a security assessment system based on grid computing is developed. Except the feature of low-cost, reliability and adaptability, the use of virtual environment framework provides a performance optimization and competitive advantage. The integration of Globus and SHPG makes the grid power system technical architecture more flexible and reliable. The design of proxy service models, geographical templates and scalable grid group so that the scalability and adaptability of power grid more powerful. The simulation results of Shanghai power grid show that: based on grid computing for dynamic security assessment system can make full use of existing resources to achieve linear speedup and the calculation results are accurate and reliable, which provides a powerful tool.The simulation results obtained from different tests validate the advantages of the proposed methods.
Keywords/Search Tags:Transient Stability, Grid Computing, Parallel Computing, Homogeneous Parallel, Heterogeneous Parallel
PDF Full Text Request
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