Method and device for determining external regulation margin of virtual power plant

Abstract

The invention discloses a method and a device for determining an external regulation margin of a virtual power plant. The method comprises the following steps: establishing a photovoltaic power generation model, wherein a random power supply is at least one of a wind power generation power supply and a photovoltaic power generation power supply; according to the photovoltaic power generation model, simulating a corresponding net output curve of the virtual power plant in a preset time period; according to the net output curve, obtaining target electric quantity corresponding to the virtual power plant, wherein the electric quantity is any one of risk standby electric quantity and risk power shortage; obtaining the maximum output electric quantity and the maximum input electric quantity corresponding to the virtual power plant according to the target electric quantity, the current stored electric quantity of the energy storage unit and the controllable micro power supply generating capacity; and determining the external adjustment margin of the virtual power plant according to the maximum output electric quantity and the maximum input electric quantity. According to the invention, the technical problem that the grid-connected form using the micro-grid as the distributed power supply is limited by the geographic area in the prior art is solved.

Description

technical field [0001] The invention relates to the field of energy allocation, in particular to a method and device for determining the external adjustment margin of a virtual power plant. Background technique [0002] In related technologies, as the world's energy shortage, environmental pollution and other issues become increasingly prominent, distributed power supply is adopted by more and more countries because of its reliability, economy, flexibility and environmental protection. However, despite the outstanding advantages of distributed power, there are still many problems. First of all, distributed power sources have small capacity, large quantity, and uneven distribution, which makes the cost of single-machine access high, which is often invisible to system operators and even makes management difficult; secondly, the access of distributed power sources brings a lot Technical problems, such as power flow changes, line congestion, voltage flicker, harmonic effects, e...

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Problems solved by technology

[0004] The main purpose of the present invention is to provide a method and device for determining the external adjustment margin of a virtual power plant, so as to solve the technical problem in the related art that the grid-connected form of the distributed power source using the micro-grid is limited by the geographical area

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