Method for optimizing operation of distribution network jointly connected with soft normally open point (SNOP)and energy storage device

Abstract

A method for optimizing the operation of a distribution network jointly connected with an soft normally open point (SNOP)and an energy storage device, comprises the following steps of: a, establishinga distribution network model jointly connected to the SNOP and the energy storage device by using back-to-back VSCs and a battery; b, establishing a distribution network daily dynamic optimization model based on the SNOP and the energy storage device; c, solving the optimization model by using a genetic algorithm to obtain control reference values including the active power PI flowing through the VSC on a feeder line I side, the active power PJ flowing through the VSC on a feeder line J side, the reactive power QI of the VSC on the feeder line I side, and the reactive power QJ of the VSC onthe feeder line J side, and giving a two-step correction strategy to improve the service life of the energy storage device and the absorption level of uncontrollable distributed power supply. The method combines the SNOP and the energy storage device to form a highly integrated intelligent distribution network comprehensive regulation and optimization device, further strengthens the scheduling control capability of the SNOP, provides the SNOP with a power transmission function and an energy storage function, can suppress fluctuations caused by new energy connection and improves the absorptioncapacity of distributed power source.

Description

technical field [0001] The invention relates to a distribution network operation optimization method, which can stabilize intermittent energy power fluctuations, improve the consumption level of high-penetration distributed power sources, and balance feeder loads. Background technique [0002] At present, with the rapid development of the economy, the world is facing the double pressure of the depletion of non-renewable energy sources and serious environmental pollution. As an indispensable form of energy in today's society, electric energy is also facing a major change in the form of production. The grid-connected scale of renewable energy power generation is increasing year by year. Renewable energy power generation is of great significance to the development of a resource-saving and environment-friendly society. However, due to the influence of climate, environment and other factors, renewable energy power generation has obvious randomness and volatility. Large voltage ...

AI Technical Summary

Problems solved by technology

Most of the existing research focuses on the operation control strategy of SNOP alone access, only a few of which involve the joint access of SNOP and energy storage, and none of them involve the multi-time scale operation optimization method of distribution network based on the joint access of the two. Therefore, there is an urgent need for a distribution network multi-time scale operation optimization method that considers the joint access of intelligent soft switches and energy storage devices to enhance the dispatching and control capabilities of SNOP

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