Dynamic equivalents of power systems with online measurements Part 2: applications

Ju, Ping; Li, F.; Yang, Nanfang; wu, Xing; He, Nan

doi:10.1049/ip-gtd:20040075

Cited by 23 publications

(12 citation statements)

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“…Another form such as generator and load can be used. The model of the equivalent generator can be of any order [9]. For simplicity, the classical model for the equivalent generator is used for the example.…”

Section: A Methodologymentioning

confidence: 99%

Enhanced measurement-based dynamic equivalence using coherency identification

Kim

Overbye

2013

2013 IEEE Power and Energy Conference at Illinois (PECI)

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Power system dynamic simulation demands substantial computation due to extensive interconnection among power systems. Traditionally, the computational burden has been reduced by using dynamic equivalent methodologies, such as modal, coherency and measurement-based. Measurement-based method replaces an external system with a simple equivalent and estimates its parameters through optimization method with measurement. However, the conventional method does not clearly present the model structure for the external equivalent. This ambiguity, then, may lead to poor performance of the equivalent. The proposed method uses generator equivalent model and shows how to choose a proper number of generators for the equivalent model structure using coherency concept. The approach preserves relevant modes from the external and thus enhances the simulation performance of the dynamic equivalent. Test results of a simple power system are presented and show a high level of accuracy of the proposed method.Index Terms-Power system dynamic simulation, Dynamic equivalent, measurement-based method, coherency identification

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Section: A Methodologymentioning

confidence: 99%

Enhanced measurement-based dynamic equivalence using coherency identification

Kim

Overbye

2013

2013 IEEE Power and Energy Conference at Illinois (PECI)

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“…There are many algorithms to deal with model parameter equivalence, such as particle swarm optimization method (PSO) [27], dynamic aggregation [28,29], weighted summation method and least square method [30,31]. Appropriate algorithms can be implemented for desired applications.…”

Section: Dynamic Equivalence Modulementioning

confidence: 99%

Development approach of a programmable and open software package for power system frequency response calculation

Xie

Zhang

et al. 2017

Prot Control Mod Power Syst

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Dynamic behaviour of frequency is crucial for power system operation and control. Several frequency response models have been proposed to reveal frequency dynamics from different aspects. A comprehensive software package incorporating major frequency response models is needed for analysis and control of power system frequency dynamics. In this paper, an approach for developing a programmable and open software package for frequency response studies is proposed. The framework of the package is extendable with reduced frequency response models. Essential models for frequency response study are included, e.g., generator, load, and under-frequency load shedding (UFLS). The provided application program interfaces (APIs) enable simulation with high-level languages by calling dynamic link library and makes the package programmable. An advanced application module is developed for quantitative assessment of transient frequency deviation. APIs can also be used for model extension and secondary development. To demonstrate the usage of the package, several examples are illustrated to explain how to perform simulations with the package, and to perform advanced applications using scripting with the provided APIs.

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“…Therefore, most of centralized analysis approaches employ reduced (equivalent networks) rather than detailed models for external networks which downgrade the integrity of the analysis results [18]. In addition, the wide geographical areas covered by interconnected networks provide many constraints for modeling methods based on wide area measurements [19]. It seems that the distributed simulation approach (DSA) is a unique practical solution to secure the accuracy of calculations as well as guarantee information security and enhancement of processing power and real-time control constraints with minimal cost [20].…”

Section: Necessity Of Implementing the Distributed Simulation Conceptmentioning

confidence: 99%

A Novel Distributed Simulation Approach in Adaptive Distance Relaying

Sadr

Kouhsari

2009

SIMULATION

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In this paper, an adaptive distance relaying strategy based on the global network simulation (GNS) concept is presented. The GNS concept is actually a distributed simulation approach (DSA) for piecewise analysis of large-scale power grids using diakoptics and large change sensitivity (LCS) concepts. To set each utility's relays trip settings adaptively in each power system condition, detailed short circuit analysis is run in the GNS environment. It first updates the pre-fault voltage profile across utilities and then modifies their nodal Z Bus in such a way to reflect the effect of the whole network in local fault studies performed by individual utilities1 hence, presenting an accurate and secure federative approach on a geographically decomposed grid using local information and computational resources. A set of currently experienced rules in distance coordination is outlined and adaptive as well as conventional relay zone settings in each sub-network are calculated based on the selected rules. An efficient easy-to-implement algorithm to consider the effect of zero sequence mutual impedance among parallel lines is also presented and well integrated into the proposed adaptive approach in the GNS environment. The IEEE 14 bus test system and a real version of a large-scale grid with more than 2,600 buses are used to illustrate the characteristics of the proposed adaptive strategy in terms of security and dependability by comparison with conventional distance protection.

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Dynamic equivalents of power systems with online measurements Part 2: applications

Cited by 23 publications

References 1 publication

Enhanced measurement-based dynamic equivalence using coherency identification

Enhanced measurement-based dynamic equivalence using coherency identification

Development approach of a programmable and open software package for power system frequency response calculation

A Novel Distributed Simulation Approach in Adaptive Distance Relaying

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