Development of coherency-based time-domain equivalent model using structure constraints

Nath, Ram; Lamba, S.S.

doi:10.1049/ip-c.1986.0029

Cited by 24 publications

(8 citation statements)

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“…In this way, the computation time and complexity can be reduced. Low-frequency equivalencing is achieved by extracting only the relevant modes of oscillation from a dynamic model, which reduces the dimension and complexity of the problem [16], [35]. There are different approaches inside the LFE method discussed in the literature.…”

Section: B Low-frequency Equivalentmentioning

confidence: 99%

Review of Methods to Accelerate Electromagnetic Transient Simulation of Power Systems

et al. 2021

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Converter-based generators are increasingly replacing classical synchronous generation, resulting in significant challenges to the operation and planning of modern power systems. Power electronics (PE)-based equipment, along with non-linear PE-driven loads, introduce time-varying characteristics and fast switching behavior that increases the complexity of the power system model. Faster control actions are needed to overcome the fast switching dynamics to ensure the reliability and stability of future power systems. Thus, this requires advanced and detailed simulation methods and tools with highly accurate equivalent models to embody the relatively slower electromechanical to faster electromagnetic transient (EMT) phenomena. Conventional transient stability analysis using positive-sequence simulators has become inadequate for representing converter-dominated power systems, while EMT simulators suffer from the high computational burden. This review paper presents accelerated EMT simulation methods and tools that are categorized and discussed in three topics: system equivalents, simulation methods, and accelerating tools. Dynamic system equivalent techniques are discussed to model small to large interconnected external systems of the grid network. Moreover, a systematic review is made for existing EMT simulation methods, along with advanced co-simulation methods, for addressing simulation speed and accuracy issues in large power system networks. Emerging hardware-based simulation tools are reviewed that reduce the computational burden and increase the simulation efficiency of the power system model. Challenges and trends in EMT simulation are also presented and concluded by providing perspectives on this research topic.

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Section: B Low-frequency Equivalentmentioning

confidence: 99%

Review of Methods to Accelerate Electromagnetic Transient Simulation of Power Systems

et al. 2021

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“…For steps 1) and 2), techniques for aggregating a group of induction machines [15]- [17] and synchronous machines [18]- [21] have been well developed. The methods proposed in [15], [20], and [21] have been adopted by this work.…”

Section: Model Equivalence Processmentioning

confidence: 99%

Dynamic Load Models for Industrial Facilities

Liang

Chung

et al. 2012

IEEE Trans. Power Syst.

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This paper presents a new method to construct dynamic models for large industrial and commercial facilities commonly connected to power transmission systems. These facilities typically draw large amounts of power and have complex dynamic responses to power system disturbances. Traditional load modeling approaches such as those based on load composition or site measurement are not adequate to produce dynamic models for such facilities. In this paper, a facility template-based load modeling technique along with template scaling/equivalence algorithms is proposed to solve the facility modeling problem. Oil refinery facilities are used as an example to illustrate the proposed modeling technique. The technique requires minimal user input and can be implemented in a database program.Index Terms-Facility load model, load modeling, oil refinery facility, power system dynamics.

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“…Dynamic equivalent coherency-based of external part of a power system can be performed in main three steps: coherency identification, network reduction and coherent generators aggregation [10][11][12].…”

Section: Dynamic Equivalent Coherency-based Modelmentioning

confidence: 99%

Study on Dynamic Equivalent Coherency-Based of Hainan Power Grid

Zhang

Ming-yang

et al. 2012

2012 Asia-Pacific Power and Energy Engineering Conference

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A dynamic equivalent approach coherency-based is researched for dynamic simulation Hainan China power grid. In order to reduce the original system, the dynamic equivalent model coherency-based is established, in which the identification of coherent generators, network reduction and dynamic aggregation coherent generator parameters are included, it is two key steps of identification coherent generators and dynamic aggregation parameter of generator unit. Coherent generators are identified by swing-curve method, CSR method used for network reduction and weighted-average algorithm applied to aggregation of coherent generators unit model. The equivalent system of Hainan power grid is compared with the original system in scale, steady status and dynamic performance, respectively. Results show that the equivalent system can preserve the main dynamic characteristics of the Hainan original system well.

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Development of coherency-based time-domain equivalent model using structure constraints

Cited by 24 publications

References 0 publications

Review of Methods to Accelerate Electromagnetic Transient Simulation of Power Systems

Review of Methods to Accelerate Electromagnetic Transient Simulation of Power Systems

Dynamic Load Models for Industrial Facilities

Study on Dynamic Equivalent Coherency-Based of Hainan Power Grid

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