Distributed energy storage adaptive droop control method based on voltage sensitivity matrix

A technology of distributed energy storage and voltage sensitivity, which is applied in the direction of AC network voltage adjustment, photovoltaic power generation, electrical components, etc., and can solve problems such as unreasonable node energy storage output, large node voltage fluctuations, and limit violations

Pending Publication Date: 2022-01-07
SOUTHEAST UNIV +1
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Problems solved by technology

However, the traditional droop control with fixed droop coefficient belongs to the design of the droop coefficient completely depends on the forecast of photovoltaic output in the day, so it is difficult to adapt to the situation of large changes in the inject

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  • Distributed energy storage adaptive droop control method based on voltage sensitivity matrix
  • Distributed energy storage adaptive droop control method based on voltage sensitivity matrix
  • Distributed energy storage adaptive droop control method based on voltage sensitivity matrix

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[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present disclosure, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0036] like Figure 1~2 As shown, in some examples of the present invention, a distributed energy storage adaptive droop control method based on voltage sensitivity matrix is ​​disclosed,

[0037] (1) At the distributed energy storage access node, active power-voltage droop control is adopted for the energy storage device, and the active power-voltage sensitivity matrix is ​​generated according to the real-time operation of the distribution network, ...

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Abstract

The invention provides a distributed energy storage adaptive power voltage droop control method based on a voltage sensitivity matrix, and belongs to the technical field of power grid voltage treatment. The method comprises the steps of firstly, adopting active-voltage droop control for each distributed energy storage access node, designing each droop coefficient by injecting an active-voltage sensitivity matrix to the node, then establishing a closed-loop system droop control model comprising a droop control part and a power system response part by using the active-voltage sensitivity matrix, predicting the voltage value of each node after droop control is used by utilizing an equation established according to the closed-loop model so as to adjust the droop coefficient in time, and preventing the condition that the node voltage is out of limit after the droop control is used. Compared with the prior art, according to the scheme, the droop coefficient is adaptively adjusted according to the real-time operation condition of the system, so that the voltage of the system is operated within a reasonable range, the operation safety of the system is improved, and meanwhile, the absorption capacity of a power distribution network for photovoltaic energy is ensured.

Description

technical field [0001] The invention belongs to the technical field of grid voltage management, and in particular relates to a distributed energy storage self-adaptive droop control method based on a voltage sensitivity matrix. Background technique [0002] In order to improve the consumption of photovoltaic energy, the main voltage regulation means can be divided into active power control means and reactive power control means. For distribution networks with large R / X, the use of active power control methods can significantly improve the voltage compared with reactive power control methods. Therefore, distributed energy storage is often introduced, and active power-voltage droop control is used for energy storage access nodes to achieve local voltage governance. However, the traditional droop control with fixed droop coefficient belongs to the design of the droop coefficient completely depends on the forecast of photovoltaic output in the day, so it is difficult to adapt t...

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Application Information

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IPC IPC(8): H02J3/28H02J3/12H02J3/48
CPCH02J3/28H02J3/12H02J3/48H02J2300/24H02J2203/20Y02E10/56Y02E70/30
Inventor 全相军吴在军杨媛平李淑锋王方胜郑涛李吉平
Owner SOUTHEAST UNIV
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