Voltage stability and sensitivity analysis considering dynamic load for smart grid

Suo, Lian; Morii, S.; Ishii, Tatsuki; Kawamoto, Shunji

doi:10.1109/isgt.2010.5434774

Cited by 8 publications

(4 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These mechanism models are established based on assumptions and simplifications, and used for specific power systems and factors. Lian studied the effect of dynamic load characteristics on the voltage stability and sensitivity in power systems, using the P-V and the Q-V curves [11]. In Lian's method, the power system is equivalent to an decentralized system; dynamic loads are approximated as differential equations.…”

Section: B Related Workmentioning

confidence: 99%

A Correlation Analysis Method for Power Systems Based on Random Matrix Theory

et al. 2017

IEEE Trans. Smart Grid

View full text Add to dashboard Cite

The operating status of power systems is influenced by growing varieties of factors, resulting from the developing sizes and complexity of power systems; in this situation, the modelbased methods need be revisited. A data-driven method, as the novel alternative, on the other hand, is proposed in this paper: it reveals the correlations between the factors and the system status through statistical properties of data. An augmented matrix, as the data source, is the key trick for this method; it is formulated by two parts: 1) status data as the basic part, and 2) factor data as the augmented part. The random matrix theory (RMT) is applied as the mathematical framework. The linear eigenvalue statistics (LESs), such as the mean spectral radius (MSR), are defined to study data correlations through large random matrices. Compared with model-based methods, the proposed method is inspired by a pure statistical approach, without a prior knowledge of operation and interaction mechanism models for power systems and factors. In general, this method is direct in analysis, robust against bad data, universal to various factors, and applicable for real-time analysis. A case study, based on the standard IEEE 118-bus system, validates the proposed method.

show abstract

Section: B Related Workmentioning

confidence: 99%

A Correlation Analysis Method for Power Systems Based on Random Matrix Theory

et al. 2017

IEEE Trans. Smart Grid

View full text Add to dashboard Cite

show abstract

“…Restored loads increase the stress on the high voltage network by increasing the reactive power consumption and causing further voltage reduction [9]. Based on the load dynamic characteristics in [12] and [26], we propose the following universal model for the load dynamics:…”

Section: A Load Dynamicsmentioning

confidence: 99%

Appearance of multiple stable load flow solutions under power flow reversal conditions

Nguyen

Turitsyn

2014

2014 IEEE PES General Meeting | Conference &Amp; Exposition

View full text Add to dashboard Cite

Abstract-In complex power systems, nonlinear load flow equations have multiple solutions. Under typical load conditions only one solution is stable and corresponds to a normal operating point, whereas the second solution is not stable and is never realized in practice. However, in future distribution grids with high penetration of distributed generators more stable solutions may appear because of active or reactive power reversal. The systems can operate at different states, and additional control measures may be required to ensure that it remains at the appropriate point. This paper focuses on the analysis of several cases where multiple solution phenomena is observed. A noniterative approach for solving load flow equations based on the Gröbner basis is introduced to overcome the convergence and computational efficiency associated with standard iterative approaches. All the solutions of load flow problems with their existence boundaries are analyzed for a simple 3-bus model. Furthermore, the stability of the solutions is analyzed using a derived aggregated load dynamics model, and suggestions for preventive control are proposed and discussed. The failure of naïve voltage stability criteria is demonstrated and new voltage stability criteria is proposed. Some of the new solutions of load flow equations are proved to be stable and/or acceptable to the EN 50610 voltage fluctuation standard.

show abstract

“…OPTIMUM CONTROL BASED ON NEIGHBOR-TALK APPROACH Although this paper relates to plug & play control of EPPs in smart micro-grids, we refer to an optimum control technique [9], which is applicable if neighbor active nodes (i.e., grid nodes where an EPP is connected) communicate with each other. Optimum control allows minimization of distribution loss [10,11], full exploitation of distributed energy resources, and voltage support [12].…”

Section: Introductionmentioning

confidence: 99%

Plug & play operation of distributed energy resources in micro-grids

et al. 2010

View full text Add to dashboard Cite

Smart grids offer a new wide application domain for power electronics. In fact, every distributed energy resource includes an electronic power processor to govern the power exchange with the grid. Such energy processors must perform cooperatively to fully exploit renewable energy sources and improve power quality and distribution efficiency. This is particularly important in low-voltage residential micro-grids, where number of active energy sources and generated power vary during daytime. A simple and effective control solution, based on a plug & play approach, is presented in the paper. It allows independent and stable operation of every EPP while providing full utilization of energy sources and reduction of distribution losses. Accordingly, residential micro-grids may perform efficiently, adapt to supply and load variations and turn automatically from grid-connected to islanded operation.

show abstract

Voltage stability and sensitivity analysis considering dynamic load for smart grid

Cited by 8 publications

References 15 publications

A Correlation Analysis Method for Power Systems Based on Random Matrix Theory

A Correlation Analysis Method for Power Systems Based on Random Matrix Theory

Appearance of multiple stable load flow solutions under power flow reversal conditions

Plug & play operation of distributed energy resources in micro-grids

Contact Info

Product

Resources

About

Voltage stability and sensitivity analysis considering dynamic load for smart grid

Cited by 8 publications

References 15 publications

A Correlation Analysis Method for Power Systems Based on Random Matrix Theory

A Correlation Analysis Method for Power Systems Based on Random Matrix Theory

Appearance of multiple stable load flow solutions under power flow reversal conditions

Plug &amp; play operation of distributed energy resources in micro-grids

Contact Info

Product

Resources

About

Plug & play operation of distributed energy resources in micro-grids