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And DC parallel system dynamic voltage stability evaluation model and algorithm

rolCharacteris-tics,[link widoczny dla zalogowanych], I force t. ConfODPowerSystemTechnologyBeijingNOV. , I994, (2): 55I ~ 558. ModelsandAlgorithmforDynamicVoltageStabilityAssessmentofParallelAC / DCPowerSystemChengJinghuiLiuMingboZhaoYan (ElectricPowerCollege, SouthChinaUniversity6f \AnsampleparallelAC / DCpowersystemiscalculatedandanalysisedOIXthebasisofeig ∞ a anal5rsisthee-ry, rotor-angleinstabilityandvoltageinstabifityarediscriminatedusingrelativefactors,[link widoczny dla zalogowanych], andsomeprelininaryconclusionsisreached. KeywordsparallelAC / DCpowersystem, dynamicvoltagestability, eigen - anal-ysis, discriminationofrotor - angleinstabilityandvoltageinstability ・ 14 ・ Automation of Electric Power Department memo No. 2 of 1998 to discuss issues: on the Dynamic Load Model in the literature in recent years has been recommended by a number of species ( including the IEEE recommended), different models often lead to different conclusions, including the critical buckling mode and transmission power value). Do the authors think they can be properly used to simulate the load models occasion dinner? A: We believe in the current literature of several commonly used in the recommended model (including the constant impedance static model, static model of quadratic fitting curves, mechanical transient model, electromechanical transient model), the electromechanical transient model has the best accuracy, mainly because it is not only taking into account the slip,[link widoczny dla zalogowanych], also considered the potential of the color ring for transient and voltage stability static model does not reflect the nature of the mechanism, mechanical transient model ignored the transient electric potential, can not accurately reflect the voltage characteristics. In our subsequent study also confirmed the precision electromechanical transient model of the highest,[link widoczny dla zalogowanych], followed by the second curve model sets Zhuo, mechanical transient model and the next. The maximum error of constant impedance model. But in the actual analysis, if all loads are used electromechanical transient model will greatly increase the state space matrix formed by the order,[link widoczny dla zalogowanych], difficulty of large-scale system, we found that by comparison: general load curve model fit to take second, while load center only one or a few typical load is taken as the analysis of electromechanical transient model has higher accuracy and lower the order of the load model is an ideal method of selecting. In addition, we used the actual electromechanical transient model is static and dynamic hybrid model, our analysis found that: the proportion of dynamic load greater impact on the results, the dynamic load ratio is not conducive to feeding the high voltage stability analysis in practice must be accurate as possible given the dynamic load ratio parameter. On the next 6 to discuss Question 1: In practice, how to estimate the dynamic process of excitation system to control the effect. A: In this article \the interference of other parameters, such as the damping coefficient D changes, this control method l is still valid, but consider the space and other reasons. it is not for this simulation.
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