عنوان

Voltage Stability Assessment and Control Based on Synchrophasor Measurements in Ambient Condition

شماره

TL52286

زبان متن نوشتاري يا گفتاري و مانند آن

انگلیسی

عنوان اصلي

Voltage Stability Assessment and Control Based on Synchrophasor Measurements in Ambient Condition

نام عام مواد

[Thesis]

نام نخستين پديدآور

Amelian, Sayed Mohammad

نام ساير پديدآوران

Venkatasubramanian, Vaithianathan

نام ناشر، پخش کننده و غيره

Washington State University

تاریخ نشرو بخش و غیره

2019

متن يادداشت

87 p.

جزئيات پايان نامه و نوع درجه آن

Ph.D.

کسي که مدرک را اعطا کرده

Washington State University

امتياز متن

2019

متن يادداشت

Voltage stability assessment and control are among the top priority tasks for electric utilities and power system operators. Failure in performing these correctly, has resulted in some of the major blackouts over the past few decades. Continuous loading increase on system infrastructure, higher reliability and security requirements, as well as progressive renewable resource integration, incapable of guaranteeing sustained reactive support, have all made this function more complex, and yet more crucial. Traditionally, developed algorithms for calculating voltage stability margin and recommending the necessary control action, rely on complete and accurate system models, as well as extensive offline studies. Investigating previous incidents has proved this to be a challenging goal to achieve. At the same time, integration of high-sampling measurement devices such as synchrophasors, powerful processors, and fast communication have resulted in increased situational awareness and monitoring quality of the system behavior. As a result, there is high interest today, to develop measurement-based real-time tools for determining system status from stability point of view and deduce the optimal control actions in critical conditions. In this dissertation, accurate modeling of the power system ambient data, corresponding to its operation at quasi steady-state condition is discussed, and the difference between system's steady-state response and power flow solutions is investigated. Based on this clarification, a new distributed model-free algorithm is proposed for voltage stability assessment and control of a power system, based on steady-state Q-V sensitivity of system buses. This is realized through subspace system identification from input-output response based on ambient measurements. Once the sensitivities are known, system proximity to voltage instability can be determined using the minimum sensitivity, rank system buses according to their stability margin and the need for corrective control actions, and determine the optimal set of actions needed to bring system operation point back to a secure state. To pursue the latter, two optimization approaches with different objectives based on various operating policies are introduced towards finding the best local control action within a substation. Finally, an index is introduced to determine vulnerability of the system to voltage instability caused by limitation on a generator's reactive power.

اصطلاح موضوعی

Electrical engineering

مستند نام اشخاص تاييد نشده

Amelian, Sayed Mohammad

مستند نام اشخاص تاييد نشده

Venkatasubramanian, Vaithianathan

مستند نام تنالگان تاييد نشده

Washington State University

نام الکترونيکي

فرمت انتشار

p

نوع ماده

[Thesis]

کد کاربرگه

276903

سطح دسترسي

a

تكميل شده

Y