Optimized Configuration Of Energy And Voltage Staunchness Analysis In Oil-field Power Grid

On the basis of analyzing the oil-field power grid, especially the problems in a northwestern oil-field power grid, this paper investigated the optimized configuration of energy and voltage staunchness in oil-field.The current situation of oil-field power grid is introduced and the substantial problems are indicated. The paper analyzes the technology development and tendency, specifies the theoretical basis of the work, and provides the correlative research achievements and methods.Combined with the actual situation of oil-field power grid and the concept of'actual power price', subjected to the principle of minimizing the power cost under the circumstance of purchasing the same electric quantity, the paper presents the model of optimized configuration of TLMB power grid energy, which establishes the foundation of oil-field power grid energy optimization and line loss ratio analysis.Based on analyzing the methods of optimizing configuration of power grid energy, combined with the requirement of a northwestern oil-field power grid energy configuration, the paper researches the optimized configuration of oil-field power grid energy using genetic algorithm. Genetic algorithm is defective in terms of encoding rule, design of genetic operator and so on. Furthermore, it computes inefficiently, converges slowly and prematurely. So, the paper adopts improved genetic algorithm, which combines the chaotic algorithm with the genetic algorithm. The proposed algorithm utilizes the ergodicity of chaos to carry on the rough and global search to increase the quality of initial individual and computational efficiency. Moreover, while initiating, the float point number encoding scheme is adopted, which improves the computational complexity of genetic algorithm, increases the computational efficiency. On the basis, the configuring steps of oil-field power grid energy optimization are proposed and carried out.In the analysis of staunchness of power grid, the condition of a vulnerability system is that of bifurcation. By tracing the equilibrium solutions flow pattern, the location and type of static bifurcation and dynamic bifurcation in the vector field can be confirmed. Therefore, the analysis of staunchness of system can be carried out by tracing the equilibrium solutions flow pattern. For tracing the equilibrium solutions flow pattern more widely, the paper improves the method used in present, and simulates the whole process from bifurcation to breakdown of oil-field power grid. According to modeling the oil-field power grid and analyzing the distribution of its eigenvalue in s domain and z domain, from which, it can be inferred that the power grid is approximate staunch at present.The paper researches positive regulating voltage effect, negative regulating voltage effect of under load tap control (ultc), influences of different regulating voltage distance on the location of critical points of negative regulating voltage effect, influences of under load regulating voltage capacity on the location of critical points of negative regulating voltage effect, influences of transmission distance on the location of critical points of negative regulating voltage effect. Furthermore, the paper analyzes the effect of ultc under constant power loads, constant current loads, constant impedance loads.The paper analyzes the influences of change of loads, change of reactive power on the voltage staunchness of oil-field power grid, and provides the simulation results.At last, prevention at a northwestern oil-field level, the paper analyzes and simulates the power grid voltage staunchness synthetically, indicates the staunch parts, vulnerable parts, parts easy to be unstable, and comes to provide the measurement of improving the voltage staunchness of oil-field power grid.