Large-step generator model based on time domain transformation
A generator and time domain technology, which is applied in the directions of controlling generators, controlling generators, and motor generators through magnetic field changes, and can solve problems such as the realization of generator models that are not given.
Active Publication Date: 2018-08-03
范圣韬 +1
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However, it does not give the realization of the generator model. Due to the importance of the generator in the dynamic process of the power system, how to realize the generator model under the framework of large-step technology based on time domain transformation is very important.
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[0082] specific implementation
[0083] figure 1 When the synchronous generator shown in is in steady-state operation (generator input mechanical torque is 0, excitation voltage is 1 per unit), test the dynamic process after the three-phase grounding of the generator outlet, adopt the method proposed by the present invention The motor model based on time domain transformation is used for simulation calculation. Due to the large step size technology based on time domain transformation, compared with the typical step size of 50 microseconds used in traditional electromagnetic transient simulation programs, this example uses a 500 microsecond step size under the premise of ensuring calculation accuracy. The step size is calculated. Different from the motor model in the traditional electromagnetic transient simulation program, the motor model based on time domain transformation proposed by the present invention can not only output the instantaneous waveform of the stator quantit...
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The simulation step length of the electromagnetic transient simulation program of a power system is usually relatively small, for example, the simulation step length is 50 microseconds, when the electromagnetic transient simulation program is applied to the calculation of a large-scale power system, calculation speed is very low due to small calculation step length, and as a result, the actual calculation needs of the power system cannot be met. According to a time domain transformation-based large-step technology, based on the characteristics of the sinusoidal waves of voltage and current of the power system, quickly-changing electric quantity is converted into slowly-changing signals through time domain transformation, and therefore, larger simulation step length, for example millisecond-level simulation step length, can be adopted, and at the same time high simulation accuracy can be ensured. According to the invention, an implementation method of a generator model is provided under the time domain transformation-based large-step length technical framework; based on the phase domain description of a generator, a time domain transformation-based large-step length generator model is provided through a time domain transformation method. Compared with a traditional electromagnetic transient generator model, the new model can use a larger step length without losing simulation accuracy, thereby greatly improving simulation efficiency.
Description
technical field [0001] The invention relates to a generator model realization method based on time-domain transformation, which belongs to the field of electromagnetic transient simulation of electric power system. Background technique [0002] The electromagnetic transient simulation program was mainly used for the calculation of the electromagnetic transient process of the power system in the early days, and now it has a wider application in the fields of dynamic and static analysis of the power system; for example: for large-scale AC and DC power systems including FACTS and HVDC equipment When performing dynamic process simulation, the simulator needs to have the same fast characteristics as the transient stability calculation program, and at the same time need to have the same accuracy as the electromagnetic transient program. However, when the electromagnetic transient program is applied to large-scale power system calculations, its calculation speed is extremely slow d...
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IPC IPC(8): H02P21/18H02P9/14
Inventor 范圣韬王良
Owner 范圣韬