Multi-time scale active power distribution network voltage control method

Abstract

The invention discloses a multi-time-scale active power distribution network voltage control method, which comprises the following steps of: establishing voltage optimization considering a large-scale distributed power supply so as to realize collaborative dynamic control under voltage out-of-limit when the distributed power supply is merged into a power distribution network; under a long time scale, a voltage control model for regulating and controlling a capacitor bank is established based on voltage sensitivity analysis, and the voltage is greatly regulated under the condition of voltage out-of-limit through reactive compensation; under a short time scale, a distributed voltage control model is established, a voltage out-of-limit problem is considered, active and reactive output of a distributed power supply is fully utilized to solve an optimal control strategy on line, and an effect of rapidly adjusting voltage is achieved. The large-scale distributed power supply and the capacitor bank are coordinated under different time scales, the voltage out-of-limit problem of the active power distribution network is solved, the adjustment response speed is high, and the voltage control effect is good.

Description

technical field [0001] The invention belongs to the field of distribution network voltage control, and in particular relates to a multi-time scale active distribution network voltage control method. Background technique [0002] As a clean energy source, distributed power generation has developed rapidly in recent years. By the end of 2020, the total installed capacity of photovoltaics has reached about 253 million kilowatts, and the total installed capacity of wind turbines has reached about 281 million kilowatts. It is connected to the distribution network at a high proportion with the advantages of energy saving, environmental protection and flexible operation control, which can better adjust the power quality of the distribution network and improve the safety and reliability of power supply. Therefore, the large-scale access of distributed energy to the distribution network has become an irreversible situation. However, after a high proportion of distributed power is co...

AI Technical Summary

Problems solved by technology

Under the high penetration rate of distributed power generation, the requirements for grid-connected indicators are higher, random small disturbances are more frequent, and the requirements for system modeling are higher and more complex.

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