PSCAD (Power System Computer Aided Design)-based electric complex torque coefficient scanning method

A technology of complex torque coefficient and scanning method, which is applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., to achieve the effect of high speed and low cost

Active Publication Date: 2014-05-07
STATE GRID ECONOMIC TECH RES INST CO +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, DC projects such as Genan, Tianguang Erhui, Gaoling and Huliao have found that there is a risk of SSO caused by HVDC

Method used

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  • PSCAD (Power System Computer Aided Design)-based electric complex torque coefficient scanning method
  • PSCAD (Power System Computer Aided Design)-based electric complex torque coefficient scanning method
  • PSCAD (Power System Computer Aided Design)-based electric complex torque coefficient scanning method

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Embodiment Construction

[0027] The method proposed by the present invention will be further described below in conjunction with the drawings and embodiments.

[0028] Such as figure 1 Shown is that the present invention proposes and is used for the electrical complex torque coefficient scanning method flowchart; The concrete steps of this method are:

[0029] 1) Load the electrical complex torque coefficient scanning module on the electromagnetic transient software;

[0030] The electrical complex torque coefficient scanning module includes: parameter input area, algorithm implementation area, result monitoring area, and the result monitoring area monitors the scanned values ​​of the electrical elastic coefficient and electrical damping coefficient in real time to determine whether they are valid; the module communicates with external systems through data interfaces The data is exchanged, and the encapsulation of the parameter input area, the algorithm implementation area, and the result monitoring ...

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Abstract

The invention discloses a PSCAD (Power System Computer Aided Design)-based electric complex torque coefficient scanning method, and belongs to the field of stable control of power systems. The method comprises the following steps: (1) loading an electric complex torque coefficient scanning module onto electromagnetic transient software; (2) inputting an electric parameter and a scanning parameter; (3) generating small-amplitude turbulence according to the scanning frequency, and applying the turbulence to the mechanical torque of a rotor specific to the power system which enters a stable state already; (4) extracting an electromagnetic torque signal of a generator and the angular speed response of the rotor after the system enters the stable state once again, and calculating an electric complex torque coefficient; (5) judging whether the scanning frequency surpasses a cut-off frequency or not, if the scanning frequency does not surpass the cut-off frequency, adding a scanning step length on the basis of the frequency, returning to the step (3), and scanning the electric complex torque coefficient of a next frequency point; if the scanning frequency surpasses the cut-off frequency, stopping calculation and finishing scanning. By adopting the PSCAD-based electric complex torque coefficient scanning method, automatic scanning of an electric complex torque coefficient method on time domain simulation software is realized, a simulation method is quick, and the cost is low.

Description

technical field [0001] The invention relates to the field of power system stability control, and in particular to a PSCAD-based electrical complex torque coefficient scanning method. Background technique [0002] Subsynchronous Oscillation (SSO) in power system is a serious stability problem, which will lead to the accumulation of fatigue and even fracture of the main shaft of the generator set, which seriously threatens the safe operation of the power system. Series capacitance compensation for transmission lines or DC transmission systems may cause undesirable interactions between generator sets and the grid leading to subsynchronous oscillations. In the 1970s, during the debugging process of the Square Butte HVDC transmission project in the United States, the SSO problem of the turbogenerator set caused by HVDC was discovered for the first time. Later, in the HVDC transmission projects such as CU and IPP in the United States, Rihand-Deli in India, and Fenno-Skan in Swede...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 马为民蒋维勇许建庭郭春林陈菡肖湘宁
Owner STATE GRID ECONOMIC TECH RES INST CO
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