A Planning Method for Synchronous Condensers in Weak Grids Using Semi-Definite Optimization

Hadavi, Sajjad; Saunderson, James; Mehrizi‐Sani, Ali; Bahrani, Behrooz

doi:10.1109/tpwrs.2022.3174922

Cited by 22 publications

(10 citation statements)

References 34 publications

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“…The shaft system of a DFIG wind turbine is modelled by a twomass system [15]. In this model, the masses of a high-speed generator and low-speed turbine are modelled as a damper and spring system represented by:…”

Section: Shaft Systemmentioning

confidence: 99%

“…The shaft system of a DFIG wind turbine is modelled by a two‐mass system [15]. In this model, the masses of a high‐speed generator and low‐speed turbine are modelled as a damper and spring system represented by:

\begin{equation}2{H_t}\ \ \frac{{d\ {\omega _t}}}{{dt}} = {T_m}\ \ - {D_{tg}}\left( {{\omega _t} - {\omega _r}} \right) - {D_t}{\omega _t} - {{\mathrm{K}}_{tg}}\left( {{{{\theta}}_{\mathrm{t}}} - {{{\theta}}_{\mathrm{r}}}} \right)\end{equation}

\begin{equation}2{H_g}\ \ \frac{{d\ {\omega _r}}}{{dt}} = {{\mathrm{K}}_{tg}}\ \ \left( {{{{\theta}}_{\mathrm{t}}} - {{{\theta}}_{\mathrm{r}}}} \right) + {D_{tg}}\left( {{\omega _t} - {\omega _r}} \right) - {D_g}{\omega _r} - {T_e}\end{equation}

where ω r and ω t are the generator and turbine rotor speeds, respectively.…”

Section: Dynamic Model Of Grid‐connected Dfigmentioning

confidence: 99%

“…A DFIG wind farm with a capacity of 150-MW was connected to a compensated transmission line. Increasing the compensation level of this transmission line led to the SSR phenomenon [14,15].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Proposed sub‐synchronous resonance damping controller for large‐scale wind farms

Moradi‐Shahrbabak

2023

IET Renewable Power Gen

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This paper deals with the mitigation of sub‐synchronous resonance (SSR) in doubly‐fed induction generator (DFIG)‐based wind farms using a sub‐synchronous resonance damping controller (SSRDC). The performance of the SSRDC depends on its input control signal and the location of its output control signals. Hence, this paper presents an algorithm to select the best location for applying the SSRDC. The DFIG parameters are used as the inputs of this algorithm. Also, the participation factors analysis is employed as this algorithm's main core. The output of this algorithm determines that the control signal of SSRDC can be applied either in the grid‐side converter (GSC) and/or in the rotor‐side converter (RSC). The best input location in the GSC is the DC‐link voltage and the best input location in the RSC is the q‐component of the rotor voltage. The accuracy of this algorithm was evaluated by investigating the effect of various input signal locations on the SSR using the eigenvalue analysis. This analysis indicated that the dc‐link voltage and the q‐components of the rotor voltage are the most effective signals on the sub‐synchronous oscillatory modes. Moreover, this paper introduces a new SSRDC using these two signals. The performance of this controller is validated through the eigenvalue analysis and a time domain simulation.

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Section: Shaft Systemmentioning

confidence: 99%

\begin{equation}2{H_t}\ \ \frac{{d\ {\omega _t}}}{{dt}} = {T_m}\ \ - {D_{tg}}\left( {{\omega _t} - {\omega _r}} \right) - {D_t}{\omega _t} - {{\mathrm{K}}_{tg}}\left( {{{{\theta}}_{\mathrm{t}}} - {{{\theta}}_{\mathrm{r}}}} \right)\end{equation}

\begin{equation}2{H_g}\ \ \frac{{d\ {\omega _r}}}{{dt}} = {{\mathrm{K}}_{tg}}\ \ \left( {{{{\theta}}_{\mathrm{t}}} - {{{\theta}}_{\mathrm{r}}}} \right) + {D_{tg}}\left( {{\omega _t} - {\omega _r}} \right) - {D_g}{\omega _r} - {T_e}\end{equation}

where ω r and ω t are the generator and turbine rotor speeds, respectively.…”

Section: Dynamic Model Of Grid‐connected Dfigmentioning

confidence: 99%

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Proposed sub‐synchronous resonance damping controller for large‐scale wind farms

Moradi‐Shahrbabak

2023

IET Renewable Power Gen

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“…As a general rule, the SCR is used in RERs to classify weak grids. Systems with SCRs less than three are considered weak grids, and systems with SCRs less than two are considered very weak grids [13], [36]. As introduced in [13],the SCR at the PoC is calculated as:…”

Section: A Weak Grid Definitionmentioning

confidence: 99%

“…The solar farm has 160 inverters with a size of 2.5 MW, which is modeled as an aggregate model in PSCAD. The SynCon uses an AC1A exciter model [36]. The SynCon parameters are listed in Table I.…”

Section: B Testbed Systemmentioning

confidence: 99%

Quantifying Stability in Inverter-based Weak Grids in the Presence of Synchronous Condensers

Hadavi

Mehrizi‐Sani

Bahrani

2023

Preprint

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The high penetration of renewable energy resources integrated via power electronic inverters in weak and low-inertia grids is introducing new challenges to power systems. Inverter-based resources (IBRs) do not have native inertia similar to fossil-fuel-based generators and can cause sustained oscillations and instability. Synchronous Condensers (SynCons) are considered as a reborn technology to provide a solution for system strengthening and inertia supporting in IBR-dominant power systems. Although SynCons are a well-known technology, additional assessment for analyzing the stability of a weak grid with a high penetration of renewable resources in the presence of SynCons is required. This paper proposes a quantitative index for the stability analysis of a system, which includes black-boxed IBRs and SynCon. The proposed index is stemmed from impedance-based stability analysis. In this paper, the impact of a SynCon on the proposed stability index is evaluated in a single-machine infinite-bus system, and its accuracy is also verified in an IEEE 39-bus system. Additionally, the findings are verified using time-domain simulation tests in PSCAD/EMTDC software.

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Optimal allocation of synchronous condensers for reducing commutation failure risk in multi-infeed LCC-HVDC systems

Guo,

Li,

Chen

et al. 2024

Electr Eng

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A Planning Method for Synchronous Condensers in Weak Grids Using Semi-Definite Optimization

Cited by 22 publications

References 34 publications

Proposed sub‐synchronous resonance damping controller for large‐scale wind farms

Proposed sub‐synchronous resonance damping controller for large‐scale wind farms

Quantifying Stability in Inverter-based Weak Grids in the Presence of Synchronous Condensers

Optimal allocation of synchronous condensers for reducing commutation failure risk in multi-infeed LCC-HVDC systems

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