Simulation model and modeling and simulation method for turn-to-turn faults of air-core shunt reactor

An inter-turn fault and simulation model technology, applied in the fields of instrumentation, electrical digital data processing, special data processing applications, etc., can solve problems such as RTDS real-time simulation research and modeling introduction that have not yet been found, and achieve the prevention of reactor fire and combustion accidents, Low cost, accurate and reliable results

Pending Publication Date: 2019-11-22
EXTRA HIGH VOLTAGE POWER TRANSMISSION NANJING OF CHINA SOUTHERN POWER GRID
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  • Claims
  • Application Information

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Problems solved by technology

[0011] At present, there is no RTDS real-time simulation research and modeling introduction for the dynamic

Method used

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  • Simulation model and modeling and simulation method for turn-to-turn faults of air-core shunt reactor
  • Simulation model and modeling and simulation method for turn-to-turn faults of air-core shunt reactor
  • Simulation model and modeling and simulation method for turn-to-turn faults of air-core shunt reactor

Examples

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Embodiment 1

[0100] The modeling and simulation method of the inter-turn fault real-time simulation system are introduced below through actual cases.

[0101] The following is a simplified model of inter-turn fault real-time finite ladder unit built based on the power system simulation software PSCAD simulation system (RTDS system modeling and simulation are completely the same as PSCAD, except that RTDS has powerful computing power, and the output of digital and analog electrical quantities has real-time performance) , and demonstrate the fault development process through the timing control switch, and output the waveform.

[0102] A dry-type air-core shunt reactor, model BKGKL-20000 / 35, rated current I N is 990A, the total loss P t 200kW, rated voltage 35 / √3=20207V, rated inductance 65mH (reactance 20.4Ω), quality factor Q=100, total number of layers N i For 44 layers. The calculated effective number of turns N of the reactor coil is 9592, and the average turn equivalent AC resistance...

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Abstract

The invention provides a simulation model and modeling and simulation method for turn-to-turn faults of an air-core shunt reactor, and belongs to the technical field of computer analog simulation of power systems. A fault turn is equivalent to a limited number of finite step unit models which are developed and expanded according to a nonlinear step type; the input of a finite step unit model is controlled according to the nonlinear step time sequence of the development process; each unit and step type input are carried out in an ideal transformer loop of the step unit by cutting off [delta]LN;and [delta]RN access is realized. Therefore, the real turn-to-turn short circuit dynamic development change process is simulated; related electrical quantity change characteristics in a dynamic process are displayed; a dynamic digital physical model is built in an RTDS real-time digital simulation system by utilizing the dynamic characteristics; the on-line monitoring and protecting device is used for checking and detecting whether the on-line monitoring and protecting device based on various technical principles and methods can effectively and rapidly discover faults in the complex dynamic fault characteristic process or not, effective and rapid protection is carried out, and electric reactor ignition and combustion accidents are prevented.

Description

【Technical field】 [0001] The invention relates to the technical field of power system computer simulation, in particular to a modeling and simulation method suitable for RTDS real-time digital simulation and non-real-time simulation systems such as PSCAD / EMTD to simulate the dynamic process of inter-turn faults of air-core shunt reactors in power systems. 【Background technique】 [0002] As the main inductive element of the power transmission system, the reactor plays the role of reactive power compensation, limiting short-circuit current, and filtering harmonics in the system. Compared with dry-type iron-core reactors, dry-type air-core reactors have the advantages of low noise, maintenance-free, no magnetic saturation, good reactor linearity, etc., and are more and more widely used in power grid applications. [0003] Industry statistics show that inter-turn short circuit is the most common dry-type air-core reactor fault. Many published references and technical patents me...

Claims

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Application Information

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IPC IPC(8): G06F17/50G06Q10/06G06Q50/06
CPCG06Q10/067G06Q50/06Y02E60/00
Inventor 刘锦杰贾跟卯张怿宁骆福权罗赞琛叶波卢英俊钟宏乐刘佳薇
Owner EXTRA HIGH VOLTAGE POWER TRANSMISSION NANJING OF CHINA SOUTHERN POWER GRID
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