Parallel partition electromagnetic transient digital simulation method of AC and DC power system

A technology for electromagnetic transient simulation and power system, which is applied in electrical digital data processing, special data processing applications, instruments, etc. It can solve the problems of difficulty in real-time simulation and increase in calculation amount, and achieve the effect of flexible network segmentation.

Active Publication Date: 2012-01-18
CHINA ELECTRIC POWER RES INST +1
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Problems solved by technology

When the network topology changes due to the switch-on or switch-off of the converter valve, the calculation conductance matrix of the voltage equation of the node needs to be re-decomposed by triangular (LU). Due to frequent changes in the network topology, it will cause a significant increase in the amount of calculation, which is difficult to achieve. real-time simulation

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  • Parallel partition electromagnetic transient digital simulation method of AC and DC power system
  • Parallel partition electromagnetic transient digital simulation method of AC and DC power system
  • Parallel partition electromagnetic transient digital simulation method of AC and DC power system

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Embodiment Construction

[0069] figure 1 It is a flow chart of the method for splitting parallel electromagnetic transient digital simulation of AC and DC power systems according to the first embodiment of the present invention.

[0070] like figure 1 As shown, the AC / DC power system segmentation parallel electromagnetic transient digital simulation method according to the first embodiment of the present invention includes the following steps:

[0071] Step 1: AC and DC power system segmentation.

[0072] In this step 1, the target AC and DC power system is divided into multiple subnets through node splitting or distributed parameter line decoupling, including AC network subnet, converter subnet and DC network subnet. There may be one AC network subnet, converter subnet or DC network subnet, or multiple subnets.

[0073] figure 2 A method for dividing an AC and DC power system is shown. like figure 2 As shown, the target power system is divided into six subnets S1-S6, where S1 and S2 are conve...

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Abstract

The invention discloses a parallel partition electromagnetic transient digital simulation method of an AC and DC power system. The method comprises the following steps of: partitioning a target AC and DC power system into a plurality of subnets comprising an AC network subnet, a current converter subnet, a DC network subnet or an AC and DC mixed network subnet; acquiring equivalent impedance matrix and equivalent potential at port point of each subnet; acquiring current of the tie-line between the subnets; acquiring node voltages of each subnet according to the current of the tie-line betweenthe subnets; solving differential equations of a generator, a control system, and the like of each subnet; processing a user self-defined model, an MATLAB model and input and output information of a physical device; processing input and output information of an electromagnetic transient interface. The simulation method has the advantages of flexible net partition mode, high computation speed, andthe like. The simulation method can be simultaneously suitable for electromagnetic transient net partition parallel computation of an AC and DC system, parallel computation of electromechanical transient, accessing a user self-defined model, processing an MATLAB model and a physical device and the like, thereby realizing digital simulation of various transient and dynamic processes of the AC and DC power system.

Description

technical field [0001] The invention relates to an electromagnetic transient digital simulation method of an AC and DC power system, and more specifically, to a split parallel electromagnetic transient real-time dynamic simulation method of an AC and DC power system. Background technique [0002] The main purpose of the simulation of the electromagnetic transient process of the power system is to analyze and calculate the transient overvoltage and overcurrent that may occur after a fault or operation, so that the relevant power equipment can be reasonably designed and determined according to the obtained transient overvoltage and overcurrent. Whether the existing equipment can operate safely, and study the corresponding restrictions and protective measures. [0003] The electromagnetic transient digital simulation generally adopts the three-phase instantaneous value model, and the calculation step size is 20-200 microseconds. [0004] In the electromagnetic transient simula...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 田芳周孝信
Owner CHINA ELECTRIC POWER RES INST
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