Dynamic equivalence to induction generators and wind turbines for power system stability analysis

Li, Shenghu; Liu, Zhengkai; Hao, Xinjie; Jia, Shaofeng

doi:10.1109/pedg.2010.5545879

Cited by 10 publications

(4 citation statements)

References 6 publications

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“…where P PVe and P PVi are the active power of equivalent PV and each original PV; λ e and λ i are the control parameter of equivalent PV and each original PV. Because the weighted calculation of PVs with different dynamic characteristics reduces the accuracy of the equivalent, PVs in the original system should be classified by dynamic characteristics before the equivalent (Li et al, 2010;Ma et al, 2012). Based on the significantly distinct dynamic characteristics of PVs in different operating states, original PVs can be classified by operating states.…”

Section: Analysis Of Equivalent Difficulties On Distributed Pvsmentioning

confidence: 99%

Equivalent of distribution network with distributed photovoltaics for electromechanical transient study based on user-defined modeling

Jiang¹,

Zhao²,

et al. 2023

Front. Energy Res.

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As more and more distributed photovoltaics (PVs) are installed in distribution networks, the dynamic characteristics of PVs affect the operation of the bulk power system. Accurate simulation of PV characteristics is essential for the needs of power system transient security and stability analysis. However, because of the large number of distributed PVs, detailed modeling of each PV significantly increases the electromechanical transient simulation time. The equivalent study of distribution networks with distributed PVs is needed to improve simulation efficiency. However, existing equivalent methods of PVs mainly focus on centralized PVs but are unsuitable for distributed PVs with significantly different dynamic characteristics. To improve simulation efficiency, this paper proposes an equivalent method of the distribution network with distributed PVs for electromechanical transient study based on user-defined (UD) modeling. Firstly, the equivalent structure of the distribution network is established. The static equivalent of the transmission lines and the dynamic equivalent model of loads are carried out. Then, a UD model based on PSASP is established for the dynamic equivalent of the distributed PVs. Compared with the current PV models in simulation software, the UD model has multiple sets of parameters for the equivalent of distributed PVs with different dynamic characteristics. Finally, the particle swarm optimization (PSO) algorithm is used to obtain the parameters of the equivalent PV. The effectiveness of the proposed method is verified under an example of a distribution network with PVs in PSASP.

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Section: Analysis Of Equivalent Difficulties On Distributed Pvsmentioning

confidence: 99%

Equivalent of distribution network with distributed photovoltaics for electromechanical transient study based on user-defined modeling

Jiang¹,

Zhao²,

et al. 2023

Front. Energy Res.

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show abstract

“…Clustering is the process of dividing a large amount of data into several different groups. For a PV power plant, the clustering task is completed by determining the similarity of the previously selected grouping indexes in the data attributes, so that the similarity of feature vectors of the same group is larger than that of different groups [53,54]. The essence of grouping by the operating state of units is to use the iconic demarcation point to group.…”

Section: Grouping Methodsmentioning

confidence: 99%

A Survey on Equivalence Modeling for Large-Scale Photovoltaic Power Plants

et al. 2018

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Due to the huge data of large-scale photovoltaic (PV) power plants, the establishment of its equivalent model is more practical than a detailed model. In connection with the current research status, this paper reviews the steady-state equivalent model and transient equivalent model of PV power plants. The steady-state equivalent model is used for power flow calculation and static stability analysis. Transient equivalent models contain the single-machine equivalent model and the multi-machine equivalent models, which are used for the simulation analysis of large disturbances. The calculation of equivalent parameters and the equivalence of power collection system are briefly introduced. The conclusion and problems to be solved are put forward at the end. The establishment of the equivalent model simplifies the detailed model, which is convenient for the planning and simulation analysis of the PV power plant, and can also accurately characterize the operating characteristics of the PV power plant, which is of great significance.

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“…In the coherent-based equivalent method of large-scale power grids, the coherent generator group is equivalent to corresponding aggregates, and only key transmission lines and nodes are retained. Therefore, the power system scale can be reduced and the main dynamic characteristics can be preserved [9]- [11]. However, the PV power generation is different from conventional power generation, so the criterion for PV system coherency must be defined to benefit from a coherency-based equivalent method.…”

Section: Index Terms-distribution Network Equivalent Modeling Fuzzymentioning

confidence: 99%

“…Before equivalence, the voltage difference between the M PV systems and the PCC can be obtained by the power flow calculation, which is denoted as ΔU k (k = 1,2,...,M). Then we can calculate the weighted average voltage difference of the M PV systems (the power of a PV system is used for weighting) as: (9) After equivalence, according to Fig. 4, the voltage difference between the x th equivalent PV system and the PCC is calculated as follows: (10) where U PCC is the voltage of at the PCC point .…”

Section: B Equivalence Of Line Parametersmentioning

confidence: 99%

Equivalent Modeling Method for Regional Decentralized Photovoltaic Clusters Based on Cluster Analysis

Wu¹,

Liu²,

Chen³

et al. 2018

CPSS TPEA

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Dynamic equivalence to induction generators and wind turbines for power system stability analysis

Cited by 10 publications

References 6 publications

Equivalent of distribution network with distributed photovoltaics for electromechanical transient study based on user-defined modeling

Equivalent of distribution network with distributed photovoltaics for electromechanical transient study based on user-defined modeling

A Survey on Equivalence Modeling for Large-Scale Photovoltaic Power Plants

Equivalent Modeling Method for Regional Decentralized Photovoltaic Clusters Based on Cluster Analysis

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