Hand-in-hand AC/DC power distribution and utilization system operation stability analysis method

A technology with stable operation and analytical methods, applied in the field of electric power, can solve problems such as difficult and convenient analysis, and achieve the effects of intuitive stability criteria, diverse and feasible topology structures, and good network connectivity

Active Publication Date: 2021-04-09
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the system structure is variable and the order of the model is high, this type of method is greatly restricted, and it is difficult to carry out convenient analysis

Method used

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  • Hand-in-hand AC/DC power distribution and utilization system operation stability analysis method
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  • Hand-in-hand AC/DC power distribution and utilization system operation stability analysis method

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Embodiment Construction

[0042] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, 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 making creative efforts belong to the protection scope of the present invention.

[0043] According to an embodiment of the present invention, such as figure 1, describes the systems interconnected with the DC network through the voltage-source converter (VSC) and AC system 1, AC system 2...AC system n...AC system N, among which VSC1, VSC2...VSCn ...the AC side of the VSCN is respectively connected to AC system 1, AC system 2...AC system n...AC system N. The DC network can integrate renewable energy such as wind power and photov...

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Abstract

The invention provides a hand-in-hand AC / DC power distribution and utilization system operation stability analysis method. The system comprises a plurality of voltage source type converter stations including a master station and a plurality of slave stations. The method comprises the following steps: 1, constructing an equivalent impedance of a single slave station of the system: according to an equivalent circuit of an AC / DC power distribution system, establishing the equivalent impedance of a single slave station, and taking the equivalent impedance as input in the step 2; 2, constructing the overall equivalent impedance of the slave stations: establishing the overall equivalent impedance of N-1 slave stations according to the equivalent circuit of the AC / DC power distribution system; 3, constructing a main station transfer function: establishing a first transfer function of a direct-current voltage control loop of the main station according to the structures of a power controller and a current controller of an AC / DC interconnected converter station; 4, constructing an overall transfer function of the system: connecting the overall equivalent impedance of the slave station in the step 2 with the first transfer function in the step 3 in series, and establishing an overall second transfer function of the system; and 5, carrying out frequency domain analysis on the second transfer function output in the step 4.

Description

technical field [0001] The invention relates to the field of electric power, in particular to a method for analyzing the operation stability of a hand-in-hand AC / DC power distribution system. Background technique [0002] With the depletion of fossil energy and the increasingly serious environmental problems, new energy has been developed by leaps and bounds. Distributed energy has attracted worldwide attention due to its obvious advantages such as strong flexibility, power supply reliability, high energy utilization efficiency, and nearby consumption. In addition, the large increase in DC loads such as electric vehicles, residential building power supply, and industrial park data centers and the promotion of energy storage devices have promoted the development of DC power distribution technology. AC and DC power distribution systems will become one of the important forms of power distribution networks in the future. . In terms of structure, innovative research on multi-te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/36
CPCH02J3/36Y02E60/60
Inventor 邓卫吴琦裴玮张国驹孔力
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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