Smart grid energy-saving optimized comprehensive evaluation method

Abstract

The invention relates to a smart grid energy-saving optimized comprehensive evaluation method. According to the smart grid energy-saving optimized comprehensive evaluation method, two-layer iteration is adopted to solve load flow problems; according to inner-layer iteration, a forward and backward substitution method is adopted to calculate pure radial network load flows composed of branches; and the outer-layer iteration constantly revises injection current at nodes at two ends of each branch so as to realize overall convergence. The smart grid energy-saving optimized comprehensive evaluation method of the invention is advantageous in energy saving effect.

Description

technical field [0001] The invention relates to a comprehensive evaluation method for energy saving optimization of a smart grid, which is applied in the field of electric power monitoring. Background technique [0002] In the distribution network monitoring and management system, in order to reduce line loss, improve the terminal voltage and asset utilization of the distribution area, provide high-quality power services, and meet customers' higher requirements for power quality, it is necessary to calculate the optimal reactive power compensation position and The minimum compensation amount, reactive power compensation at the best position can achieve the effect of using the minimum compensation amount to obtain better voltage quality and smaller network loss; [0003] In order to achieve the above goals, system modeling, optimization algorithm, power flow calculation, network loss analysis, and graphical interface are required for the distribution station area; the distrib...

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Problems solved by technology

[0004] The current commonly used three-phase power flow calculation can be divided into loop impedance method and forward push-back method. The loop impedance method proposed by S.K Goswami and S.K Basu in 1991 takes the loop current as a variable and forms from the root node of the feeder to each load point. For a loop, according to Kirchhoff’s voltage law, the loop current equation is listed. This method has a strong ability to deal with meshes, but the processing of node and branch numbers is complicated

The forward push-back algorithm was originally developed from the hand calculation algorithm. When used for the power flow calculation of the radial distribution network, the efficiency of this algorithm is the highest among all algorithms, and it occupies very little memory. Due to its own advantages, the generation method has been continuously improved abroad and applied to actual production. Its disadvantage is that special processing is required when it is applied to a ring network;

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