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Flexible direct-current electromechanical and electromagnetic hybrid simulation method

A flexible DC and electromagnetic hybrid technology used in the field of power systems

Inactive Publication Date: 2014-02-05
STATE GRID CORP OF CHINA +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

With the hybrid operation of large-capacity AC and DC transmission channels, the stability and dynamic characteristics of the power grid will undergo profound changes. Scientific and reasonable planning of the power grid, safe and reliable operation of equipment, and continuous and stable power supply of the system will all face new and greater challenges.

Method used

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  • Flexible direct-current electromechanical and electromagnetic hybrid simulation method
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  • Flexible direct-current electromechanical and electromagnetic hybrid simulation method

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Embodiment Construction

[0054] A flexible DC electromechanical and electromagnetic hybrid simulation method for simulation analysis of flexible DC and AC hybrid power grids, comprising the following steps:

[0055] (1).Establish the electromagnetic transient simulation model on the AC side of the flexible DC voltage source converter;

[0056] (2).Establish the electromagnetic transient simulation model of the DC side transmission system of the voltage source converter;

[0057] (3). Establish the numerical calculation model of the voltage source converter controller;

[0058] (4). Establish a phase-locked loop electromagnetic transient calculation model;

[0059] (5). Mutual conversion of electromechanical and electromagnetic quantities;

[0060] (6). Carry out hybrid simulation of flexible DC electromechanical and electromagnetic.

[0061] In step 1, the voltage source converter is interconnected with the AC bus through the converter transformer, and its equivalent model is represented by the RL ...

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Abstract

The invention provides a flexible direct-current electromechanical and electromagnetic hybrid simulation method. The method comprises the following steps: (1) establishing a flexible direct-current voltage source converter alternating-current side electromagnetic transient state simulation model; (2) establishing a voltage source converter direct-current side power transmission system electromagnetic transient state simulation model; (3) establishing a numerical calculation model of a voltage source converter controller; (4) establishing a phase-locked loop electromagnetic transient state calculation model; (5) performing conversion between an electromechanical quality and an electromagnetic quality; (6) and performing flexible direct-current electromechanical and electromagnetic hybrid simulation. Through the method provided in the invention, the simulation calculation accuracy of an alternating-current / direct-current hybrid power grid including a flexible direct-current circuit can be improved, and an accurate simulation tool is provided for hybrid power grid characteristic analysis and control strategy making.

Description

technical field [0001] The invention belongs to the field of power systems, and in particular relates to a flexible DC electromechanical and electromagnetic hybrid simulation method based on user-defined programs. Background technique [0002] Flexible direct current transmission (VSC‐HVDC) is a new type of direct current transmission technology with a voltage source converter (Voltage Source Converter, VSC) composed of insulated gate bipolar transistors as the core component. This power transmission technology has the technical advantages of being able to supply power to weak AC grids or passive networks, requiring no communication between converter stations at both ends, controlling active and reactive power at the same time, and not affecting the short-circuit current level of the AC grid. Because of its remarkable technical advantages, this power transmission technology has been widely concerned by the academic circles and power engineering circles, and it is a hot field...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B17/00
Inventor 郑超盛灿辉马世英陈得治张志强申旭辉陈湘宋云亭李晶邱丽萍吉平周俊李再华杨琦张鑫
Owner STATE GRID CORP OF CHINA
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