Electromagnetic transient rapid simulation method for controllable series compensation device

An electromagnetic transient and series compensation technology, applied in electrical digital data processing, flexible AC transmission systems, special data processing applications, etc., can solve the problem of difficult to guarantee the rapidity of hybrid simulation, and achieve the effect of high efficiency and time saving.

Active Publication Date: 2019-07-26
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When more and more power electronic devices are infiltrated into the power grid, it is difficult to guaran

Method used

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  • Electromagnetic transient rapid simulation method for controllable series compensation device
  • Electromagnetic transient rapid simulation method for controllable series compensation device
  • Electromagnetic transient rapid simulation method for controllable series compensation device

Examples

Experimental program
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specific Embodiment

[0116] by figure 2 The current source-TCSC power supply system shown is an example.

[0117] In the system, the input is a three-phase symmetrical current source:

[0118]

[0119] in, ω=2πf=100π, The capacitance of TCSC Ca=Cb=Cc=501.4μf, the inductance La=Lb=Lc=2.01mH, and the initial firing angle is α 0 =160°; the required quantity is the three-phase capacitor voltage and inductor current.

[0120] (1) if Figure 4 The steady state situation shown;

[0121] (2) if Figure 5 As shown, when t=0.2s, the output current amplitude of the ABC three-phase current source becomes 1.2 times of the original (symmetrical fault);

[0122] (3) if Image 6 As shown, when t=0.2s, the phase A current source has a sudden change, and the amplitude becomes 0.6 times of the original value (asymmetrical fault);

[0123] (4) if Figure 7 As shown, when t=0.2s, the firing angle changes suddenly from 160° to 170° (symmetric fault);

[0124] (5) if Figure 8 As shown, when t=0.2s, th...

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Abstract

The invention discloses an electromagnetic transient rapid simulation method of a controllable series compensation device. The method comprises the following steps: step 1, obtaining parameters; obtaining basic data including inductors La, Lb and Lc of a three-phase TCSC branch circuit, capacitors Ca, Cb and Cc of the three-phase TCSC branch circuit, expressions of three-phase current sources iA,iB and iC and an initial trigger angle alpha 0. According to the method, sine auxiliary variables are introduced, a state equation of the TCSC is converted into a homogeneous linear differential equation set from a non-homogeneous linear differential equation set, the state equations are unified in form under all working conditions, and the homogeneous linear differential equation set can be quickly solved through a matrix index integration method; compared with the fact that a system model required to be solved changes in each time step in traditional electromagnetic transient calculation, the method has the advantages that the system model required to be solved can be changed only when the on/off states of the thyristors are changed, so that the calculation is more efficient and time-saving.

Description

technical field [0001] The invention relates to the technical field of electrical simulation, in particular to an electromagnetic transient fast simulation method of a controllable series compensation device. Background technique [0002] The controllable series compensation device (TCSC) is composed of capacitors and reactors controlled by thyristors in parallel. By controlling the firing angle of thyristors, changing the topology structure, and dynamically adjusting the equivalent impedance, the series compensation degree of the transmission line can be quickly and continuously controlled to improve Transmission capacity of transmission lines, suppression of subsynchronous oscillations, etc. With the improvement of the performance and the reduction of the cost of power electronic devices, the application of TCSC in the power system is becoming more and more extensive. [0003] Digital simulation is one of the important means to study the dynamic characteristics of the pow...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/367G06F2111/10Y02E40/10
Inventor 徐圣扬毛晓明
Owner GUANGDONG UNIV OF TECH
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