Electric heating cooperative control method and optical storage direct flexible system

Abstract

The invention relates to an electric heating cooperative control method for improving the grid-connected inertia of an optical storage direct-flexible system, and the method comprises the following steps: S1, building a building virtual inertia model based on equivalent thermal parameters, and determining a reference value for converting the internal thermal inertia of a building into the grid-connected inertia according to the building virtual inertia model; s2, controlling the grid-connected power of the optical storage direct-flexible system, converting the internal thermal inertia of the building into grid-connected inertia based on a virtual synchronous power generation strategy and a reference value of the grid-connected inertia so as to improve the grid-connected inertia of the optical storage direct-flexible system, and improving the grid-connected inertia of the optical storage direct-flexible system; the grid-connected inertia of the optical storage direct-flexible system can be improved without additionally configuring energy storage equipment, the initial construction investment is reduced, and the thermal inertia stored in a building is fully excavated.

Description

technical field [0001] The invention relates to the technical field of electric control, in particular to an electric-heat synergistic control method and an optical-storage direct-flexible system. Background technique [0002] In order to adapt to the new trend of high penetration of renewable energy on the grid side and distributed development around buildings, the building power distribution system urgently needs to develop new technologies, among which "solar storage direct flexibility" is the key. Among them, "light" and "storage" respectively refer to the application of distributed photovoltaic and distributed energy storage in building scenarios, as an important part of the building power distribution system; "direct" refers to the change of the form of building power grid, from the traditional The AC distribution network is replaced by a low-voltage DC distribution network; "flexible" means that the building's electrical equipment should have the ability to be interru...

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Problems solved by technology

[0003] At present, with the continuous improvement of photovoltaic penetration rate, the grid-connected inertia of solar-storage direct-flexible systems has been significantly reduced. At present, most solar-storage direct-flexible systems are equipped with additional electrochemical energy storage devices to increase the adjustable range of system electric power, but On the one hand, the additional configuration of electrochemical energy storage devices has greatly increased the cost of system construction and operation and maintenance, and increased the safety risk of building fire protection. On the other hand, the large amount of internal thermal inertia contained in the building has not been effectively utilized, resulting in waste of resources.

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