A power stage digital-analog hybrid simulation system

A hybrid simulation and series technology, applied in the field of power systems, can solve the problems of small simulation scale and inability to connect generators, etc., and achieve the effect of improving the simulation level

Active Publication Date: 2016-01-20
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the deficiencies in the prior art, the present invention provides a power level digital-analog hybrid simulation system. The hybrid simulation system provided by the present invention adopts hardware and software resources to realize the power level hybrid simulation of a digital simulator and a physical simulation device, so as to achieve reasonable Utilize resources, improve the simulation level, provide new means for the study of AC and DC power grids, and solve the problem of being unable to connect to actual power primary equipment such as generators, transformers, lines, and converters, and the simulation scale is small

Method used

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Embodiment

[0116] Figure 9-20 Shows the actual physical simulation device and digital-analog hybrid simulation system after a three-phase-to-ground fault occurs on the rectifier side. The rectifier inverse conversion current bus voltage, current, converter transformer primary current, DC voltage, DC current, firing angle α and shut-off angle γ Contrast curves. In the figure, the dotted line is the result of the digital+physical hybrid simulation provided by the present invention by the system, and the solid line is the simulation result of the full physical simulation device collected by the acquisition system. In the steady state, the AC side voltage is constant at 1.0pu (pu is the standard unit value), the rectifier side trigger angle is about 15°, the inverter side shut-off angle is about 17°, the rectifier side voltage is basically constant at 800kV, and the DC current is 4kA. After a three-phase-to-ground fault occurs on the commutator bus on the rectifier side, the DC voltage drop...

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Abstract

The invention relates to the field of electrical power systems, in particular to a power level digital-analog hybrid simulation system. The power level digital-analog hybrid simulation system comprises a hardware circuit and a digital model, wherein the hardware circuit is used for achieving the power conversion between the digital side and the physical side and feedback signal acquisition input at the physical side, the digital model is used for achieving historical current calculation, delay compensation, current output at the digital side and voltage acquisition input at the physical side and decoupling a line model. The power conversion is carried out between the hardware circuit and the digital model, a digital simulator is connected with a device to be simulated in the physical side through the hardware circuit, calculation is completed by the digital model, calculating parameters are output to the hardware circuit, meanwhile, the hardware circuit feeds back electrical parameters to the digital model to serve as input, and the power level digital-analog hybrid simulation between the digital side and the physical side is achieved. The power level digital-analog hybrid simulation system adopts hardware and software sources, achieves power level hybrid simulation of the digital simulator and a physical simulation device, and solves the problems that access to actual power primary equipment such as a generator, a transformer, a line and a converter cannot be achieved and the simulation scale is small.

Description

Technical field [0001] The invention relates to the field of power systems, in particular to a power stage digital-analog hybrid simulation system. Background technique [0002] With the rapid development of computer technology, especially parallel computing technology, and the increasing application of various real-time digital simulation tools and physical simulation devices to the field of power electronics and power system simulation, the scale of simulation and research fields have been greatly expanded. As one of the advanced simulation methods, digital-analog hybrid simulation can not only perform full digital simulation of the system, but also perform simulation tests on physical devices, which optimizes the simulation process of the power system. [0003] Many published documents use digital-analog hybrid simulation to test secondary equipment such as relay protection and DC control systems. During simulation, the interface interacts with semaphores, so this type of simul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B17/02
Inventor 周俊宋云亭马世英胡涛刘翀
Owner STATE GRID CORP OF CHINA
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