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Electromagnetic transient simulation method and system for power system comprising electronic power switch

A power electronic switch, electromagnetic transient simulation technology, applied in the direction of design optimization/simulation, information technology support system, electrical components, etc., can solve problems such as reducing computing efficiency, increasing the amount of calculation, and unable to meet the needs of electromagnetic transient simulation. , to reduce the matrix dimension, increase the calculation speed, and improve the calculation speed.

Active Publication Date: 2021-12-17
SHANDONG UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, every time a switch state change is detected, the program needs to re-form the node admittance matrix to continue solving, which increases the amount of calculation and reduces the calculation efficiency, which cannot meet the needs of fast and accurate electromagnetic transient simulation for circuit topologies including power electronic devices.

Method used

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  • Electromagnetic transient simulation method and system for power system comprising electronic power switch
  • Electromagnetic transient simulation method and system for power system comprising electronic power switch
  • Electromagnetic transient simulation method and system for power system comprising electronic power switch

Examples

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Embodiment 1

[0046] Such as figure 1 As shown, this embodiment provides an electromagnetic transient simulation method for a power system including a power electronic switch, including:

[0047] S1: Model the switching function of the power system with power electronic switches, and obtain the electromagnetic transient equivalent circuit;

[0048] S2: Divide the electromagnetic transient equivalent circuit into subnets, and construct the network equation of the node injection current vector between the subnetworks and the connection line equation between the subnetworks according to the power electronic switch state in the subnetwork;

[0049] S3: According to the connection line current obtained by the network equation and the connection line equation, and the network equation of the node injection current vector, the subnetwork node voltage of the current switch simulation time step is obtained.

[0050] In this embodiment, in the step S1, the switching function modeling process include...

Embodiment 2

[0085] This embodiment provides a power system electromagnetic transient simulation system including power electronic switches, including:

[0086] The equivalent module is configured to perform switching function modeling on a power system including power electronic switches to obtain an electromagnetic transient equivalent circuit;

[0087] The subnetwork division module is configured to divide the electromagnetic transient equivalent circuit into subnetworks, and construct the network equation of the node injection current vector between the subnetworks and the connection line equation between the subnetworks according to the state of the power electronic switch in the subnetwork;

[0088] The simulation module is configured to obtain the sub-network node voltage of the current switch simulation time step according to the connection line current obtained from the network equation and the connection line equation, and the network equation of the node injection current vector....

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Abstract

The invention discloses an electromagnetic transient simulation method and system for a power system comprising a power electronic switch, and the method comprises the steps: carrying out the switching function modeling of the power system comprising the power electronic switch, and obtaining an electromagnetic transient equivalent circuit; carrying out sub-net division on the electromagnetic transient equivalent circuit, and constructing a network equation of node injection current vectors between sub-nets and a connection line equation between the sub-nets according to power electronic switch states in the sub-nets; and according to the network equation of the connecting line current obtained by the network equation and the connecting line equation and the node injection current vector, obtaining the sub-net node voltage of the current switch simulation time step length. The power electronic switch elements are kept in the same topological structure in different states, and the problem that when multiple power electronic switch elements are simulated, an admittance matrix changes along with changes of the topology is solved.

Description

technical field [0001] The invention relates to the technical field of electromagnetic transient simulation, in particular to an electromagnetic transient simulation method and system of a power system including a power electronic switch. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] When a large number of power electronic devices are connected to the power grid, due to the characteristics of high operating frequency and fast transient process of power electronic devices, it poses new challenges to electromagnetic transient simulation. The flow of the traditional electromagnetic transient simulation method is as follows: obtain the transient Norton equivalent current analysis signal of each component in the power system, and determine the node injection current analysis signal of the power system based on the transient Norton equivalent ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06Q50/06H02J3/00G06F113/04
CPCG06F30/20G06Q50/06H02J3/00G06F2113/04H02J2203/20Y04S10/50Y02E60/00
Inventor 赵浩然韩明哲程建东
Owner SHANDONG UNIV
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