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

An electromagnetic transient simulation and power system technology, which is applied in the fields of electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as difficulty in realizing real-time simulation and increasing calculation amount, and achieve the effect of flexible network segmentation

Active Publication Date: 2010-06-02
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 a method for splitting parallel electromagnetic transients in an AC / DC power system according to the first embodiment of the present invention.

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

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

[0072] In this step 1, the target AC / DC power system is divided into multiple sub-networks by the method of node splitting or distributed parameter line decoupling, including AC network sub-network, converter sub-network and DC network sub-network. The number of AC network subnets or converter subnets or DC network subnets may be one or multiple.

[0073] figure 2 An AC / DC power system partitioning method is shown. like figure 2 As shown, the target power system is divided into six sub-networks S1-S6, wherein S1 and ...

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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 between the 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, and the 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 a digital simulation method for electromagnetic transients of an AC / DC power system, and more particularly, to a real-time dynamic simulation method for split parallel electromagnetic transients of an AC / DC power system. Background technique [0002] The main purpose of power system electromagnetic transient process simulation is to analyze and calculate the transient overvoltage and overcurrent that may occur after a fault or operation, so as to reasonably design relevant power equipment according to the obtained transient overvoltage and overcurrent, and determine Whether the existing equipment can operate safely, and study the corresponding restrictions and protection measures. [0003] The electromagnetic transient digital simulation generally adopts the three-phase instantaneous value model, and the calculation step is 20-200 microseconds. [0004] In the electromagnetic transient simulation of the DC transmission system,...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 田芳周孝信
Owner CHINA ELECTRIC POWER RES INST
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