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Method for restraining electromagnetic transient simulation virtual power consumption of controllable power electronic device

A power electronic device, electromagnetic transient simulation technology, applied in the field of electric power, can solve problems such as heavy calculation burden, and achieve the effect of improving accuracy

Active Publication Date: 2015-09-30
CHINA ELECTRIC POWER RES INST +2
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Problems solved by technology

[0009] Although accurate power consumption can be obtained by reducing the simulation step size, the computational burden is heavy

Method used

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  • Method for restraining electromagnetic transient simulation virtual power consumption of controllable power electronic device
  • Method for restraining electromagnetic transient simulation virtual power consumption of controllable power electronic device
  • Method for restraining electromagnetic transient simulation virtual power consumption of controllable power electronic device

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Embodiment Construction

[0030] The specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0031] Such as figure 1 As shown, a method for suppressing virtual power consumption of electromagnetic transient simulation of controllable power electronic devices, said method comprising:

[0032] (1) Construct the network equation containing controllable power electronic devices; the network equation containing controllable power electronic devices in step (1) is:

[0033] G t u t = I t-Δt (1)

[0034] Among them, G t Represents the admittance matrix considering the on-off state of the controllable power electronic device, I t-Δt is the current source injected into the system, the subscript t is the simulation time, Δt is the simulation step size, U t is the network node voltage.

[0035] (2) Define the pulse trigger time t of the controllable power electronic device z , get t z The current source I injected b...

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Abstract

The invention provides a method for restraining electromagnetic transient simulation virtual power consumption of a controllable power electronic device. The method comprises the following steps: establishing a network equation containing the controllable power electronic device; defining the pulse triggering time tz of the controllable power electronic device, obtaining a current source I<tz-delta t> injected by a system during network re-calculation at the tz; obtaining the network node voltage at the pulse triggering time through the I<tz-delta t>; performing iterative integration of simulation step size, and returning interpolation to standard step size. Through the adoption of the method, the virtual power loss caused by the pulse triggering action of the controllable power electronic device is effectively avoided, and the simulating capability of the controllable power electronic device is improved.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a method for suppressing virtual power consumption of electromagnetic transient simulation of controllable power electronic devices. Background technique [0002] Power system electromagnetic transient simulation programs are generally based on the Dommel algorithm, mainly using the implicit trapezoidal integral algorithm. With the continuous development of power electronics technology, various power electronic devices based on controllable power electronic devices appear in the system. They are essentially high-frequency actions of a large number of switch models. In the model, there are problems of numerical oscillation, switching action cannot be accurate to the exact moment, and synchronous switching cannot be correctly handled. In order to improve the simulation accuracy, an effective and widely used method is the linear interpolation algorithm. However, when the co...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 彭红英田芳张星徐得超穆清张爽高峰黄永宁刘敏孙丽香陈绪江王峰
Owner CHINA ELECTRIC POWER RES INST
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