A distributed voltage stability margin for power distribution networks

@article{Aolaritei2016ADV,
  title={A distributed voltage stability margin for power distribution networks},
  author={Liviu Aolaritei and Saverio Bolognani and Florian Dorfler},
  journal={arXiv: Optimization and Control},
  year={2016}
}

Figures from this paper

Hierarchical and Distributed Monitoring of Voltage Stability in Distribution Networks
TLDR
The proposed determinant approximation allows us to construct a voltage stability index that can be computed in a fully distributed or in a hierarchical fashion, resulting in a scalable approach to the assessment of steady-state voltage stability.
Real-Time Voltage-Stability Enhancement via Demand Response
TLDR
Simulations on several standard transmission networks demonstrate that the proposed methodology improves the value of the SSV of the power flow Jacobian per time step while avoiding significant bound violations.
A Framework for Robust Long-Term Voltage Stability of Distribution Systems
TLDR
A fast and reliable tool for constructing inner approximations of LTVS regions in multidimensional injection space such that every point in the authors' constructed region is guaranteed to be solvable and shown to cover substantial fractions of the true voltage stability region is presented.
A Framework for Robust Steady-State Voltage Stability of Distribution Systems
TLDR
A fast and reliable tool for constructinginner approximations of LTVS regions in multidimensional injection space such that every point in the authors' constructed region is guaranteed to be solvable.
DC power flow feasibility: Positive vs. negative loads
  • M. Todescato
  • Engineering
    2017 IEEE 56th Annual Conference on Decision and Control (CDC)
  • 2017
TLDR
This work reformulates the theory for the case of Direct Current (DC) resistive power networks and considers the particular scenario where two different types of loads are present: classical passive loads, modeled as negative quantities, and active loads due to possible distributed generation, modeling as positive quantities.
Robustness Against Disturbances in Power Systems Under Frequency Constraints
TLDR
This paper develops an alternative approach to time-domain simulation-based assessment of the system robustness against uncertain and stochastic disturbances, which has its roots in the input–output stability analysis for Lur’e systems.
Multi point distributed intelligent power distribution technology
TLDR
The verification of this model shows that the triangleload distribution model with distributed power is much better than the uniform load distribution model, and provides a theoretical basis for voltage regulation analysis.
Challenges of Future Distribution Systems with a Large Share of Variable Renewable Energy Sources – Review
Power distribution systems with a high share of Variable Renewable Energy Sources (VRE) face problems due to the variability, uncertainty, and non-dispatchable nature of VRE. This paper reviews and
Voltage stability assessment based on improved coupled single-port method
TLDR
It is shown in this study that the impedance matching can happen either before or after the loadability limit point in certain cases, and it is proven that the inaccuracy of the conventional impedance matching condition is due to the time-varying equivalent parameters of a power system.
Control Grid Strategies for Reduction of Real and Reactive Line Losses in Radial Power Distribution System
TLDR
Three control grid strategies including sharing of active load, VAR injection and changing of transformer taping have been presented in this paper in order to minimize both real & reactive line losses.
...
1
2
...

References

SHOWING 1-10 OF 33 REFERENCES
On the Existence and Linear Approximation of the Power Flow Solution in Power Distribution Networks
We consider the problem of deriving an explicit approximate solution of the nonlinear power equations that describe a balanced power distribution network. We give sufficient conditions for the
Voltage collapse in complex power grids
TLDR
This work derives a closed-form condition under which a power network is safe from voltage collapse, and extensively test its predictions on large-scale systems, highlighting how the condition can be leveraged to increase grid stability margins.
A Sufficient Condition for Power Flow Insolvability With Applications to Voltage Stability Margins
For the nonlinear power flow problem specified with standard PQ, PV, and slack bus equality constraints, we present a sufficient condition under which the specified set of nonlinear algebraic
Voltage stress minimization by optimal reactive power control
TLDR
An optimization problem is formulated which maximizes the distance to voltage collapse through injections of reactive power, subject to power flow and operational voltage constraints, by exploiting a linear approximation of the power flow equations.
Voltage Stability Evaluation Using Modal Analysis
The authors discuss the voltage stability analysis of large power systems by using a modal analysis technique. The method computes, using a steady-state system model, a specified number of the
Voltage collapse proximity indicator: behaviour and implications
With the increased loading and exploitation of the power transmission system, the problem of voltage stability and voltage collapse attracts more and more attention. A voltage collapse can take place
A Necessary Condition for Power Flow Insolvability in Power Distribution Systems With Distributed Generators
TLDR
The proposed method only requires the present snapshots of voltage phasors to monitor the power flow insolvability and voltage stability and is computationally efficient and suitable to be applied to a power distribution system with volatile DG outputs.
Use of local measurements to estimate voltage-stability margin
Estimating the proximity of power systems to voltage collapse in real-time still faces difficulties. Beside the data management and computational issues, any central-control method is subject to the
On voltage collapse in electric power systems
Several voltage collapses have had a period of slowly decreasing voltage followed by an accelerating collapse in voltage. The authors clarify the use of static and dynamic models to explain this type
Simple certificate of solvability of power flow equations for distribution systems
TLDR
A new technique to approximate the solvable boundary of distribution systems based on Banach fixed point theorem is developed that is fast and non-iterative, but also the approximated boundary is more valuable to system operators in the sense that it is closer to the feasible region.
...
1
2
3
4
...