Electromechanical transient-electromagnetic transient hybrid simulation method and system

Abstract

The invention relates to an electromechanical transient-electromagnetic transient hybrid simulation method and system. The electromechanical transient-electromagnetic transient hybrid simulation method comprises the steps that a power compensation device with one grounded end is connected to a simulation interface of a bidirectional opening of a hybrid simulation model; a controlled switch in thepower compensation device is turned on, and simulation starts; when the output power of the clamping voltage source in the power compensation device is not less than a preset threshold within a presetduration, the simulation fails; otherwise, the controlled switch of the power compensation device is turned off, and a simulation result is output. According to the technical scheme provided by the invention, the controllable power compensation device is connected to the simulation interface with the bidirectional opening, and decoupling of the electromechanical model and the electromagnetic model in the simulation starting stage is realized through the power compensation effect of the clamping voltage source of the power compensation device, so that the electromechanical model is not influenced by the unstable state of the electromagnetic model; the electromagnetic model can quickly enter a steady state by means of the support of the clamping voltage source; therefore, electromechanicaltransient-electromagnetic transient hybrid simulation can be carried out smoothly.

Description

technical field [0001] The invention relates to the field of simulation and calculation of power systems, in particular to an electromechanical transient-electromagnetic transient hybrid simulation method and system. Background technique [0002] There are great differences between the two types of power system electromagnetic transient simulation and electromechanical transient simulation in terms of calculation step size, simulation time range, variable representation, and mathematical model. [0003] The difference is that electromagnetic transient simulation usually describes the fast transient characteristics of the system with process duration in nanoseconds, microseconds, and milliseconds. The calculation step is generally 20-200 microseconds, and the typical calculation step is 50 microseconds. Electromechanical transient simulation usually describes the transient stability characteristics of the system with a process duration of several seconds to tens of seconds, a...

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Problems solved by technology

[0009] Based on the above characteristics of the hybrid simulation interface technology, it is difficult to complete the electromechanical transient-electromagnetic transient hybrid simulation model of the simulation interface during the simulation process. The reason is that the electromagnetic model of the electromechanical transient-electromagnetic transient hybrid simulation model is started. The state is not stable, and it interacts with the electromechanical model of the electromechanical transient-electromagnetic transient hybrid simulation model, resulting in large fluctuations in the interactive data at the simulation interface, which in turn leads to system instability

[0010] At present, no method to solve the above problems has been proposed

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