An optimization method of UFLS/UVLS considering the interaction of system state information

Tang, Yi; Li, Mengya; Wang, Jianming; Li, Feng; Jia, Ning

doi:10.1002/tee.22763

Cited by 1 publication

(4 citation statements)

References 25 publications

(25 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Finally, neglecting small terms, the linearized AC power flow equations for the flow on line ij are obtained as follows:

P_{ijd} = ((), Δ V_{id} - Δ V_{jd}) G_{ij} - B_{ij} θ_{ijd}

Q_{ijd} = - ((), Δ V_{id} - Δ V_{jd}) B_{ij} - G_{ij} θ_{ijd}

…”

Section: Ufls Designmentioning

confidence: 99%

“…Finally, neglecting small terms, the linearized AC power flow equations for the flow on line ij are obtained as follows 26,27 :…”

Section: Linearized Ac Power Flowmentioning

confidence: 99%

“…The integrated information of voltage and frequency and defining the LS distribution factors for active and reactive power have been used to adjust LS allocation . A new UFLS and UVLS optimal control scheme has been proposed by analyzing the spatial distribution characteristics of power grid frequency and voltage and real‐time dynamic interaction characteristics of various coupling electric quantities . Three adaptive combinational LS methods have been proposed using locally measured frequency and voltage signals.…”

Section: Introductionmentioning

confidence: 99%

“…25 A new UFLS and UVLS optimal control scheme has been proposed by analyzing the spatial distribution characteristics of power grid frequency and voltage and real-time dynamic interaction characteristics of various coupling electric quantities. 26 Three adaptive combinational LS methods have been proposed using locally measured frequency and voltage signals. In the proposed algorithms, LS is started from the locations which have higher voltage decay for longer period of time.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Multiobjective optimal setting for UFLS relays considering voltage deviation

Alizadeh

Jafari‐Nokandi

Amraee

2018

Int Trans Electr Energ Syst

View full text Add to dashboard Cite

Summary The postdisturbance power imbalance causes the power system frequency to drop. For preventing the frequency drop below the safe range, under frequency load shedding (UFLS) plan should be used by applying UFLS relays. In this paper, the conventional multistage UFLS plan is promoted via a linearized AC power flow model. A multiobjective mixed‐integer linear program is solved in order to minimize the load shedding amount and voltage deviation simultaneously. The proposed method simultaneously benefits from individual UFLS and under voltage LS (UVLS) features which may operate in the power system without coordination. The proposed method has been implemented in IEEE 39‐bus test system, and the results are presented under different scenarios. The results show that the proposed model for locating UFLS relays and their optimal setting can maintain both the system frequency and bus voltages in the secure operating limits.

show abstract

“…Finally, neglecting small terms, the linearized AC power flow equations for the flow on line ij are obtained as follows: