Electric power system energy storage control method of large-scale photovoltaic access

Abstract

The invention discloses an electric power system energy storage control method of large-scale photovoltaic access. The method comprises following steps that step 1, a photovoltaic power station is connected into a power transmission network and a power distribution network according to output voltage grade, a power-type energy storage system is configured in the power distribution network and an energy-type energy storage system is configured in the power distribution network; step 2, the power-type energy storage system adopts a double moving average algorithm to calculate an energy storage charging and discharging strategy, and stabilize short-time fluctuation of output power of the photovoltaic power station accessed to the power distribution network; and step 3, the energy-type energy storage system firstly carries out power generation detection on the photovoltaic power station accessed to the power transmission network and the power distribution network, carries out load prediction on the load accessed to the power distribution network so as to obtain a predicted photovoltaic output curve and a predicted load curve, then adopts a prediction control method, makes a daily operation plan, stores energy during photovoltaic power releasing period and generates power during load period at night.

Description

technical field [0001] The invention relates to the field of energy Internet, in particular to an energy storage control method for a power system connected to large-scale photovoltaics. Background technique [0002] The Energy Internet is a complex multi-network flow system formed by the core of the power system, based on the Internet and other cutting-edge information technologies, with distributed renewable energy as the main primary energy, and closely coupled with other systems such as natural gas networks and transportation networks. The five connotations of the Energy Internet are: 1) Support the transition from fossil energy to renewable energy; 2) Support large-scale distributed energy access; 3) Support large-scale hydrogen energy storage and other energy storage equipment access; 4) Use Internet technology Transform the power system; 5) Support the transition to electrified transportation. [0003] Grid-connected power generation of large-scale renewable energy s...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a large-scale photovoltaic access power system energy storage control method, which can solve the problem of randomness and volatility of renewable energy power generation by using energy storage technology in the prior art, but in a short time There are still deficiencies in the smoothing of fluctuations and regional load balancing

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