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Cooperative control method and device of DC power grid, terminal and medium

A DC power grid and coordinated control technology, applied in the direction of circuit devices, battery circuit devices, DC power supply parallel operation, etc., can solve the problems of DC grid system instability and lack of inertial support of the DC grid, so as to improve long-term effective operation and stability sexual effect

Pending Publication Date: 2022-07-22
ZHANGJIAKOU POWER SUPPLY COMPANY OF STATE GRID JINBEI ELECTRIC POWER COMPANY
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Embodiments of the present invention provide a coordinated control method, device, terminal and storage medium for a DC power grid to solve the problems of lack of inertial support in the current DC power grid and instability of the DC power grid system

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  • Cooperative control method and device of DC power grid, terminal and medium
  • Cooperative control method and device of DC power grid, terminal and medium
  • Cooperative control method and device of DC power grid, terminal and medium

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Embodiment Construction

[0055] In the following description, for the purpose of illustration rather than limitation, specific details such as specific system structures and technologies are set forth in order to provide a thorough understanding of the embodiments of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0056] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following descriptions will be given through specific embodiments in conjunction with the accompanying drawings.

[0057] figure 1 The implementation flowchart of the coordinated control method of the DC power grid provided by the embodiment of the present inv...

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Abstract

The invention provides a cooperative control method and device for a direct-current power grid, a terminal and a medium. The method comprises the following steps: acquiring a corresponding power disturbance signal when power disturbance occurs in a direct current power grid system, filtering the power disturbance signal to obtain a power disturbance output value, and determining a power disturbance type according to the power disturbance output value; respectively determining a first virtual inertia value and a second virtual inertia value according to the power disturbance type and the capacity of the supercapacitor; according to the first virtual inertia value and the second virtual inertia value, virtual inertia correction is carried out on the reference currents of the storage battery side and the supercapacitor side respectively, corrected target currents are obtained, and the inner ring currents of the storage battery side and the supercapacitor side are controlled to follow the corresponding target currents respectively. According to the invention, the output of the storage battery side and the supercapacitor side can be reasonably allocated, the purpose of collaborative allocation is achieved, and the stability of the DC power grid system is improved.

Description

technical field [0001] The invention relates to the technical field of energy storage control, in particular to a method, device, terminal and medium for coordinated control of a direct current power grid. Background technique [0002] The DC grid generally consists of networked units, AC loads, DC loads, and energy storage devices to form a ring network. As a common backup power source for DC grids, energy storage devices can quickly adjust power when the networked inverters limit current, especially in DC grid islands. In the current state, setting up energy storage equipment has become a feasible solution to stabilize intermittent power generation and random loads. Energy storage equipment has the ability to provide effective inertial support to the DC grid through rapid charging and discharging, and can maintain the stability of the DC grid when the DC grid is disturbed. [0003] Due to the gradual wide application of new energy power generation in the DC power grid, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J1/10H02J1/02H02J7/34
CPCH02J1/10H02J1/02H02J7/34H02J7/345
Inventor 任俊林文亮刘晓晨黄浦东王蒙恩慕宗江张超叶海鹏刘晓冉庞若飞马建业程佳威任大江李建萍刘达
Owner ZHANGJIAKOU POWER SUPPLY COMPANY OF STATE GRID JINBEI ELECTRIC POWER COMPANY
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