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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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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In order to overcome the disadvantage that there are hardly any analysis functions on alarm messages in current EMS, an Intelligent Expert system which processes all alarm messages from the regional Grid Dispatching C...
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This paper presents an identification method based on the iterative Prony to identify transfer function and configure PSS parameters using residue way. The iterative Prony is a very useful method to acquire power syst...
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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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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.
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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Under the general backgrounds of fast development of economy, China' power industry is undergoing a new upsurge of infrastructure construction. With the urgent need of the whole society for reliable power supply, ...
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