Method for reducing loss of micro power grid

Abstract

The invention discloses a method for reducing the loss of a micro power grid by establishing a reactive power optimization model of the micro power grid and calculating the reactive power compensation of a capacitor bank in the micro power grid by adopting the optimization algorithm when the current network has the lowest active loss. The reactive power compensation is calculated by adopting the optimization algorithm comprises the following steps: (1) generating an initialization group; (2) calculating the network loss of individuals in the group, searching the individuals with the lowest active loss, saving as the optimal values, and recording the position; subjecting all the individual positions to iteration update according to a update formula, searching the individuals with lowest active loss, saving as the new optimal values and (3) comparing the new optimal values with the original optimal values, returning the individuals of the new optimal values to the last-time iteration position if some optimal values are updated, and outputting the final optimization result after finishing the iterative computation. Compared with the prior art, the method has the advantages of reducing the loss of the micro power grid and improving the overall utilization rate of the electric energy. The selected optimization algorithm is not liable to lead to the local optimization; the equation parameters used for iterative computation are few and convenient to adjust and are more stable.

Description

technical field [0001] The invention relates to an energy-saving method for a microgrid, in particular to a method for reducing network loss in a microgrid. Background technique [0002] With the development of the national economy, the demand for electricity is growing rapidly, and the power sector is vigorously building large-scale centralized power sources such as thermal power, hydropower, and nuclear power, and ultra-high voltage long-distance transmission networks. However, with the continuous expansion of the grid scale, the operation cost of the ultra-large-scale power system is high and difficult, and it is difficult to adapt to the increasingly high safety and reliability requirements of users, as well as the diversified power supply needs. In recent years, there have been several large-scale power outages in the world, which fully exposed the vulnerability of the power grid. [0003] Micro-grid refers to a small power generation and distribution system composed o...

AI Technical Summary

Problems solved by technology

②The loss of the transmission line increases significantly

However, the reactive power control strategy of the isolated grid described in the above-mentioned patent is only based on the traditional nine-zone diagram control strategy for reactive power compensation control, and the bus voltage limit condition is added. The main starting point is to improve the voltage stability of the microgrid, and it does not Consider the need to reduce network loss in microgrid operation

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