This paper proposes a high-powercontrollable current quality disturbance generator, which is composed of multiplex cascade H bridge modules, and simulates current quality problems, such as positive and negative curre...
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Studying the HVDC typical fault-the commutation failure and its protection measures will give some guidance for HVDC engineering, also, it will improve the AC-DC powersystem safety and reliability with great signific...
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This paper proposes a high-powercontrollable voltage quality disturbance generator, which is composed of multiplex cascade H bridge modules, and simulates many types of voltage quality problems, such as voltage swell...
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A general problem in the double PWM converter is the voltage unbalance of the dc-link capacitors. This unbalance distorts the waveforms of the output voltage and current. Furthermore, it will lead to instability of th...
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This paper presents a theoretically analytical technique for determining the spectral components of high-power multilevel voltage source converters. The technique uses Double Fourier Series to analyze the output wavef...
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To avoid undesired operation of backup protection caused by load encroachment under cascading failures, the methodology for vulnerability assessment of backup protection is studied. In this paper, the vulnerability as...
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This paper presents a simple and effective approach based on two dynamic matrixes of node-relay matrix (NRM) and relay-incidence matrix (RIM) to determine minimum break point set (MBPS) for coordination of the directi...
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With the increasing expansion of AC/DC transmission system scale, the research on Available Transfer Capability (ATC) for AC/DC transmission systems has important academic and practical significances to AC/DC transmis...
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Temperature is one of the important physical variables in turbo-generators, so accurate prediction of temperature is very necessary in generators design and operation. This paper presents coupling mathematical model o...
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ISBN:
(纸本)8986510081
Temperature is one of the important physical variables in turbo-generators, so accurate prediction of temperature is very necessary in generators design and operation. This paper presents coupling mathematical model of electromagnetic and temperature field and calculates them by finite element method (FEM). First, magnetic field distribution of generators is accurately determined, so thermal source is known. Then, the mathematical model of temperature field is proposed, and temperature filed can be obtained. Couple Hield of electromagnetic and temperature in QFSN-200-2 turbo-generators is calculated by finite element analysis software (ANSYS), the proposed method is validated to be correct by comparing calculation and measurement values.
With the widely installation of Phasor Measurement Units (PMUs) in powersystem and the increasing requirement of the real-time monitoring and control, a novel powersystem topology analysis algorithm is proposed with...
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