Control method and device for improving consumption of distributed power source

Abstract

The invention discloses a control method and device for improving the consumption of a distributed power source. The method comprises the following steps: S1: acquiring power generation power within acurrent time period, power consumption power within the current time period and a current charge state; S2, calculating non-consumption power within the current time period; S3, judging whether the non-consumption power within the current time period is greater than zero, and if not, executing step S4; S4, judging whether the current charge state is greater than or equal to the minimum charge state, and if so, executing step S5; S5, performing accumulation to obtain a non-consumption power sum, and performing accumulation to obtain total charge and discharge power; S6, calculating the difference between the non-consumption power sum and the total charge and discharge power to obtain a power difference; and S7, selecting the minimum power of the maximum discharge power and the power difference of a local energy storage system, and sending a command to discharge at the minimum power to the local energy storage system. By adoption of the control method and device disclosed by the invention, the consumption of the distributed power source can be maximized on the entire time period, and meanwhile the stability of the switching power between the distributed power source and a grid sideis maintained as much as possible.

Description

technical field [0001] The invention relates to the technical field of grid-connected microgrids, in particular to a control method and device for improving the consumption of distributed power sources. Background technique [0002] With the depletion of fossil energy and the enhancement of environmental awareness, the development and utilization of renewable energy such as wind energy and solar energy are becoming more and more extensive. The distributed power generated by wind energy and solar power is connected to the grid. Sex and instability, the increasing number of distributed power sources has caused a huge impact on the power grid. [0003] For example, distributed photovoltaic power generation will affect the voltage form of the distribution network, and will affect the characteristics of the distribution network such as voltage flicker, harmonics, short-circuit current, active and reactive power flow, transient stability, dynamic stability, and frequency control. ...

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Problems solved by technology

[0003] For example, distributed photovoltaic power generation will affect the voltage form of the distribution network, and will affect the characteristics of the distribution network such as voltage flicker, harmonics, short-circuit current, active and reactive power flow, transient stability, dynamic stability, and frequency control. Negative impact

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