Voltage-profile-based approach for developing collection system aggregated models for wind generation resources for grid voltage ride-through studies

Cheng, Yunzhi; Sahni, M.; Conto, J.M. De; Huang, Shiyu; Schmall, John

doi:10.1049/iet-rpg.2010.0112

Cited by 19 publications

(7 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Detailed dynamic analysis of large distribution systems is also often impractical in electromagnetic transient programs without network reduction [14]. With more DER being installed, there has also been a focus to expand the circuit reduction methods developed for equivalencing large wind farms for transmission dynamic [15], voltage ride-through [16], and harmonic studies [17]. These types of co-simulations with both transmission and distribution often reduce the complexity of the distribution system model by aggregating distributed generation into an equivalent dynamic model [18] A novel methodology to reduce a balanced distribution feeder to any desired set of buses is presented in [19].…”

Section: Nomenclature λ Imentioning

confidence: 99%

Multiphase Distribution Feeder Reduction

Pecenak

Disfani

Reno

et al. 2018

IEEE Trans. Power Syst.

View full text Add to dashboard Cite

Quasi static time-series simulations (QSTS) of distribution feeders are a critical element of distributed solar PV integration studies. QSTS are typically carried out through computer simulation tools such as OpenDSS. Since a typical feeder contains thousands of buses, for long investigation periods or at fine time scales such simulations are computationally costly. Simulation times are reduced in this paper through a reduction of the number of buses in the model. The feeder reduction algorithm considers p-phase distribution feeders with unbalanced loads and generation, unbalanced wire impedance, and mutual coupling, while preserving the spatial variation of load and generation. An extensive Monte Carlo sensitivity analysis was performed on a real feeder from a California utility. All bus voltage differences are found to be less than 1.13% with a root mean square error of 0.21%. Simulation time savings were up to 96% when only one bus is selected to remain in the model. Example applications of the proposed algorithm are interconnection studies of utility-scale photo-voltaic system to the distribution grid, siting analyses of other distributed energy resources (DERs), and dynamic behavior of devices in large systems such as smart inverters on distribution grids.

show abstract

Section: Nomenclature λ Imentioning

confidence: 99%

Multiphase Distribution Feeder Reduction

Pecenak

Disfani

Reno

et al. 2018

IEEE Trans. Power Syst.

View full text Add to dashboard Cite

show abstract

“…Three injection methods, namely NS, CM and DS are simulated utilising Matlab Simulink SimPowerSystems toolbox. In the simulations WPP with 100 MW rating is aggregated as single WT [31]. WT converter is modelled with average voltage sources, neglecting switching behaviour [18], employing DSOGI-FLL grid synchronisation and a stationary frame PR active/reactive current controller for both positive/ negative sequences [14,19,20].…”

Section: Simulation Resultsmentioning

confidence: 99%

Impact of wind power plant reactive current injection during asymmetrical grid faults

Göksu¹,

Teodorescu²,

Bak³

et al. 2013

IET Renewable Power Generation

View full text Add to dashboard Cite

As more renewable energy sources, especially more wind turbines (WTs) are installed in the power system; grid codes for wind power integration are being generated to sustain stable power system operation with non-synchronous generation. Common to most of the grid codes, wind power plants (WPPs) are requested to stay connected and inject positive-sequence reactive current in order to boost positive-sequence grid voltage during short-circuit grid faults, irrespective of the fault type; symmetrical or asymmetrical. However, as shown in this study, when WPPs inject pure positive-sequence reactive current in case of asymmetrical faults, as a conventional method (CM) in accordance with the grid code requirement, positive-sequence grid voltage is boosted, but also higher negative sequence voltage in the grid and higher overvoltages at the non-faulty phases occur. In this study, an alternative injection method, where WTs are injecting both positive and negative sequence currents during asymmetrical faults, providing improved grid support, is given and compared with the CM. In addition, effect of coupling between positive, negative and zero sequences when WPPs are injecting currents during asymmetrical faults, is investigated, which was not considered in the wind power impact studies before.

show abstract

“…The voltage dynamics in power systems integrated with DFIG‐based WFs are reported in [13–27]. In [13], the influence of the non‐linear characteristics of WFs on system voltage is studied.…”

Section: Introductionmentioning

confidence: 99%

“…Short‐term voltage stability enhancement for high‐level wind penetrated power systems was discussed in [16, 17] through dynamic Var planning, STATCOMs, and under voltage load shedding. Aggregated wind generation resource models to study voltage responses are developed in [18] based on a voltage‐profile based approach. The simulation results in [19] show that the DFIG can improve the short‐term post‐fault stability of the conventional power network.…”

Section: Introductionmentioning

confidence: 99%