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Electromagnetic transient simulation initialization method

A technology of electromagnetic transient simulation and initialization method, which is applied in the direction of electrical components, circuit devices, AC network circuits, etc., can solve problems such as parallel processing of initialization without consideration, difficult to solve, etc., to achieve increased speed, fast numerical convergence, and improved efficiency Effect

Pending Publication Date: 2021-01-15
ELECTRIC POWER SCI & RES INST OF STATE GRID TIANJIN ELECTRIC POWER CO +2
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Problems solved by technology

The existing parallel solution technology is mainly aimed at the parallel processing of the time domain simulation process, and does not consider the parallel processing of the initialization. With the large-scale access of new energy stations, it is more difficult to solve the process

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Embodiment Construction

[0048] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0049] An initialization method for electromagnetic transient simulation, such as figure 1 shown, including the following steps:

[0050] Step 1. Construct the node network equation of the three-phase unbalanced AC-DC hybrid grid of the new energy station.

[0051] The specific implementation method of this step is:

[0052] The node network equation of the three-phase unbalanced AC-DC hybrid grid includes the following parameters: the complex impedance, harmonics and control characteristics of the three-phase unbalanced AC-DC hybrid grid. The node network equation of the three-phase unbalanced AC-DC hybrid grid includes KCL / KVL topological constraints and the constraints of series and parallel components that make up the grid. The KVL constraint of the node network equation of the three-phase unbalanced AC-DC hybrid grid is:

[0053]

[0054] The KCL con...

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Abstract

The invention relates to an electromagnetic transient simulation initialization method, which is technically characterized by comprising the following steps: constructing a node network equation of athree-phase unbalanced AC / DC hybrid power grid of a new energy station; constructing a new energy field station three-phase imbalance AC / DC hybrid power grid model based on a BP neural network according to the node network equation, and nesting load flow calculation iteration of the BP neural network; and improving the computing efficiency of the three-phase fundamental wave power flow through a multi-port equivalence-based parallel computing method. On the basis of a new energy field station sequence component model, the imbalance state of the three-phase AC / DC hybrid power grid is initialized and corrected, so that an initial point is closer to a steady-state point to improve the speed of numerical calculation; effective power flow initialization can improve the efficiency of electromagnetic transient simulation and the stability of numerical calculation, and the feasibility of power flow calculation engineering of a new energy station is improved; and according to the parallel computing method based on multi-port equivalence, the electromagnetic transient simulation initialization speed is increased, numerical convergence is fast, and interference is small.

Description

technical field [0001] The invention belongs to the field of power system operation control, in particular to an electromagnetic transient simulation initialization method. Background technique [0002] As an important part of power system simulation, electromagnetic transient simulation has the characteristics of accurate description of phenomena, wide application, and good numerical stability. Its application covers many aspects of power system planning, design, operation, and scientific research. An essential tool for the transient complex behavior of systems. [0003] The electromagnetic transient simulation without data initialization needs a long time simulation to reach the steady-state operating point, and even the initial point is far away from the steady-state point, causing the numerical calculation to diverge. Effective power flow initialization can improve the accuracy of electromagnetic transient simulation. Efficiency and stability of numerical calculations. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02J3/06
CPCH02J3/00H02J3/06H02J2203/20H02J2203/10
Inventor 鄂志君李振斌杨帮宇龚成虎崇志强于光耀郑卫洪刘伟姚维平尚学军鲍强李国栋霍现旭
Owner ELECTRIC POWER SCI & RES INST OF STATE GRID TIANJIN ELECTRIC POWER CO
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