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Research on Power System Unit Commitment with Dynamic Security Constraints

Author: ZhangMingZe
Tutor: JiangQuanYuan
School: Zhejiang University
Course: Proceedings of the
Keywords: Unit Commitment Dynamic security constraints Lagrangian relaxation Transient Stability Constrained Optimal Power Flow Interior point method Parallel Computing
CLC: TM73
Type: Master's thesis
Year: 2010
Downloads: 242
Quote: 1
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Abstract


Safety and economy is the fundamental requirement of power system operation . How to ensure the safety of the premise of improving the economics of power system operation , power system optimization is the core of economic dispatch . Subordinate to the power system unit commitment problem to optimize the economic dispatch problem is the power system optimization runs a difficulty. From the point of view of mathematical programming , unit commitment problem is high-dimensional , non- convex, non-linear mixed integer programming problems , it is difficult to find a theoretical optimal solution. This paper summarizes the research results , based on the combination of the traditional model unit shortage , we propose a dynamic security constraints to consider a combination unit model, which includes a complete power network model, transient stability constraints and some other very important nonlinear constraints , has important practical value. Meanwhile, this paper, the solution of the model in-depth study , presents a theory based on Lagrange relaxation algorithm for parallel decomposition and coordination framework . The method with variable replication technology and extended Lagrangian relaxation , the original problem is converted to its dual problem , and the principle of the dual use of additional problems decompose the problem into a single unit and single- unit combination of sub-problems with Transient Stability Constraints period optimal Power Flow (TSOPF) sub-problems . For single -unit unit commitment problem, using dynamic programming method ; For TSOPF sub-problems , the use of good robustness , fast convergence prediction - correction reduction interior point method for solving . In the solution process , this paper decoupling characteristics Lagrangian relaxation method , the introduction of parallel computing technology , the solution is given in detail the parallel implementation, to achieve a coarse-grained parallel computing . Numerical examples for different analysis results showed that: this method can consider the trend of electricity networks , transient stability and other dynamic security constraints , solution convergence better solution quality is higher, and very suitable for parallel processing , with a solution to the Unit potential problem .

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CLC: > Industrial Technology > Electrotechnical > Transmission and distribution engineering, power network and power system > Power system scheduling, management, communication
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