Photovoltaic power supply active power regulation and control method considering economic safety optimization of power distribution network

Abstract

The invention discloses a photovoltaic power supply active power regulation and control method considering the economic safety optimization of a power distribution network. The method comprises the steps: 1, obtaining a voltage actual value of a power distribution network node, and calculating the active power and reactive power of the node; 2, calculating a branch active loss index of the power distribution network; 3, calculating a voltage deviation index of the power distribution network node; 4, establishing a target function considering the economy, reliability and photovoltaic absorptioncapability of the power distribution network; 5, determining constraint conditions of power system operation under the background that a photovoltaic power supply is connected to the power distribution network; and 6, solving a photovoltaic power supply active power regulation and control model considering the economic safety optimization of the power distribution network through a linear programming algorithm, and further solving an active power optimization value of the photovoltaic power supply. According to the invention, the economy, reliability and photovoltaic absorption level of the photovoltaic power supply connected to the power distribution network can be effectively improved, the safe and stable operation of the power distribution network can be ensured, and the absorption capability of the photovoltaic power supply in the power distribution network is improved.

Description

technical field [0001] The invention relates to the field of power regulation and control of power system distribution network, and more specifically relates to a photovoltaic power supply power regulation method considering the optimization of distribution network economy and safety. Background technique [0002] With the increasing scale of photovoltaic power grid-connected installed capacity, the distribution network has alleviated the problem of high peak load pressure to a certain extent. However, the output of photovoltaic power has fluctuations and indirectness. Compared with traditional thermal power, grid-connected photovoltaic power will lead to fluctuations in operating power and voltage offsets in the power system, which will not only increase the line loss of the distribution network , and reduce the power quality of the distribution network. Although the new energy grid-connected technology at this stage has achieved certain research results in the regulation ...

AI Technical Summary

Problems solved by technology

However, the output of photovoltaic power has fluctuations and indirectness. Compared with traditional thermal power, grid-connected photovoltaic power will lead to fluctuations in operating power and voltage offsets in the power system, which will not only increase the line loss of the distribution network , and reduces the power quality of the distribution network

Although the new energy grid-connected technology at this stage has achieved certain research results in photovoltaic power regulation, there is a lack of research on the power system regulation strategy that comprehensively considers the operation economy, safety and photovoltaic consumption capacity of the distribution network.

[0003] For the research on the optimization of power system operation under the background of photovoltaic power supply connected to the distribution network, the existing achievements mainly focus on the index optimization of the stable operation of the distribution network. The operation evaluation of the power grid, but the application of the evaluation results cannot significantly improve the current situation of the difficulty of photovoltaic power consumption

In terms of power system dispatching and operation, domestic research mainly focuses on the improvement of photovoltaic power consumption capacity. The research model does not consider the safety and reliability of distribution network operation. The case of poor indicators

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