Low-voltage treatment switching power flow algorithm

Abstract

The invention relates to a low-voltage treatment switching power flow algorithm. The problem of power flow is solved by two-layer iteration, the power flow of a pure-radial network comprising branchesis calculated through inner-iteration by a forward and backward substitution method, and injection currents of nodes at two ends of a connection branch are constantly corrected by outer-layer iteration to achieve integral convergence. By the low-voltage treatment switching power flow algorithm, a loop power distribution network can be analyzed.

Description

technical field [0001] The invention relates to a low-voltage control switching power flow algorithm, which is applied in the field of electric power monitoring. Background technique [0002] At present, when the peak period of electricity consumption comes, the low voltage and high network loss in the power distribution system are problems that the power management department needs to solve urgently. With the rapid development of the national economy and the improvement of people's living standards, urban and rural electricity loads are increasing day by day, and the maximum load of the power grid is refreshed year by year. Due to the lack of local reactive power balance and voltage support equipment, the power factor and voltage of low-voltage lines are generally low. Especially in the summer of peak power consumption, due to the intensive use of air conditioners and other equipment, the voltage is seriously low, and it is facing the serious threat of voltage collapse. Th...

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Problems solved by technology

[0004] The three-phase power flow calculation commonly used today can be divided into loop impedance method and forward pushback method; the loop impedance method proposed by S.K Goswami and S.KBasu in 1991 takes the loop current as a variable, from the root node of the feeder to each load point To form a loop, according to Kirchhoff's voltage law, the loop current equation is listed. This algorithm 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 it needs special treatment when it is applied to a ring network.

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