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A Method of Improving the Speed ​​of Electromagnetic Transient Simulation of Power System

An electromagnetic transient simulation and power system technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of increasing calculation time, time increase, and reducing simulation speed, etc. The effect of dynamic simulation speed and time reduction

Active Publication Date: 2016-09-28
NR ELECTRIC CO LTD +1
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Problems solved by technology

[0007] However, in the process of solving the node voltage column vector V of the power system, inverting the node conductance matrix G will consume a lot of time; and, as the scale of the power system network increases, the order of the node conductance matrix G The number also increases accordingly, and the time required for the inverse operation of the node conductance matrix G will show a geometric increase
Especially when the power system contains switching elements with high switching frequency, the state of the switching elements may change in each simulation calculation time step. At this time, it is necessary to re-synthesize a new node conductance matrix G, and calculate the corresponding inverse matrix G -1 , which will further increase the time required for calculation and slow down the simulation speed

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  • A Method of Improving the Speed ​​of Electromagnetic Transient Simulation of Power System
  • A Method of Improving the Speed ​​of Electromagnetic Transient Simulation of Power System
  • A Method of Improving the Speed ​​of Electromagnetic Transient Simulation of Power System

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Embodiment Construction

[0032] At present, one method for improving the simulation speed is to split the high-order node conductance matrix G into several low-order matrices G1, G2..., and then calculate the split low-order matrices respectively inverse operation. In the electromagnetic transient simulation model, the method of splitting the node conductance matrix G into low-order matrices is to split the entire power system network into several sub-networks connected only by the distributed parameter transmission line model, where the distributed parameter transmission line model uses the line Description of the wave equation. In this way, not only can the time required for the inverse calculation of the node conductance matrix be effectively reduced, but the node voltage matrix equation can also be solved independently according to the matrix equation of each sub-network; figure 2 As shown, for a simulator with multiple processors, the calculation of solving matrix equations of each sub-network ...

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Abstract

The invention discloses a method for increasing electromagnetic transient simulation speed of a power system. The method includes in the process of simulation modeling, configuring ground parallels capacitor for two ends of partial or total leakage reactance containing a reactor and a transformer in a power system network to form a lumped parameter power transmission line model; calculating resistance, inductance and capacitance parameter values of unit length in the power transmission line model, using the resistance, inductance and capacitance parameter values acquired by calculating in a simulation model, and converting the lumped parameter power transmission line model into a distributed parameter power transmission line model; utilizing an electromagnetic transient simulation function to split the power system network into a plurality of subnetworks connected by the distributed parameter power transmission line model.

Description

technical field [0001] The invention relates to a power system digital simulation technology, in particular to a method for improving the speed of power system electromagnetic transient simulation. Background technique [0002] The typical method of electromagnetic transient calculation in power system is Electromagnetic Transient Program (EMTP, Electro-Magnetic Transient Program) method. The basic principle of this method is: the differential equations describing the dynamic characteristics of the power system are discretized into difference The system of equations is solved iteratively. After transformation by the EMTP method, the original dynamic components in the power system can be completely expressed in the form of resistance, current source or resistance and current source in parallel, such as figure 1 As shown; the power system transformed by the EMTP method can be described in the time domain using the commonly used node admittance algorithm, as shown in formula (...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 柏传军张翔李海英肖建民黄志岭程璐璐
Owner NR ELECTRIC CO LTD
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