Abstract
Voltage instability is a crucial issue in the secure operation of power grids. Several methods for voltage stability assessment were presented. Some of them are highly computationally intensive, while others are reported not to work properly under all circumstances. This paper proposes a new methodology based on the generator equivalent circuit model (GECM) and the phasor measurement unit (PMU) technology for online voltage stability monitoring of a power grid. First, the proposed methodology utilizes synchronized phasor (synchrophasor) measurements to determine the impedance parameters of a transmission grid by means of the recursive least squares (RLS) algorithm. Furthermore, it incorporates the dynamic models of generators to handle the cases with generator reactive power limit violations. After that, an enhanced voltage stability index with GECMs incorporated is developed for reliable and accurate voltage stability assessment. The proposed methodology was first demonstrated on several standard IEEE power systems, and then applied to a practical power system, the Taiwan power (Taipower) system. The test results demonstrate the flexibility and effectiveness of the proposed methodology.
Highlights
Voltage instability has become a challenging issue in power grids since several major blackouts worldwide have been mainly attributed to voltage collapse [1,2,3]
Theindex main would contribution of this study is to develop a novel online voltage stability thefor main contribution of this study is to develop a novel monitoring approach secure and reliable grid operations
A new voltage stability indicator based on the generator equivalent circuit model (GECM) and the phasor measurement unit (PMU) technique is presented in this research
Summary
Voltage instability has become a challenging issue in power grids since several major blackouts worldwide have been mainly attributed to voltage collapse [1,2,3]. Measurements from PMUs are time-stamped according to a high precision common time reference given by global positioning system (GPS) These time-synchronized phasor (synchrophasor) measurements include sufficient information for monitoring voltage stability of a transmission grid [9,10,11,12]. In this context, theindex main would contribution of this study is to develop a novel online voltage stability. Thefor main contribution of this study is to develop a novel monitoring approach secure and reliable grid operations. To this aim, online a new voltage voltage stability stability monitoring approach forGECM secureand andthe reliable operations. This paper, a brief description of the synchrophasor technique and the basic concept of the
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
