### Resumé

action against voltage and frequency instability or even system

blackout. In conventional Under Frequency Load Shedding

(UFLS) relays, LS is carried out by curtailing a fixed amount

of load when the frequency declines below a set of predefined

thresholds and hence, may not be adaptive to disturbance scale.

Besides, due to equality of the frequency throughout the entire

power system, there is the possibility of coincidence operation

of relays and perhaps over load shedding. Furthermore, the

LS locations are already determined independent of disturbance

location. In this paper, to aim adaptive performance of relays, the

amount of load shed in each stage is determined proportional to

the measured Rate of Change of Frequency (ROCOF). In order

to localize the LS scheme close to the disturbance place, this

scheme utilizes the voltage drop information to shed the loads

with higher voltage decay first. Therefore, this approach deals

with coordination of voltage and frequency information instead of

independent methods. Numerical simulations which are carried

out in DigSilent PowerFactory software confirm the efficiency

of proposed methodology to stabilize the power system after a

severe contingency

Originalsprog | Engelsk |
---|---|

Titel | Proceedings of the IEEE Power & Energy Society General Meeting, PES 2014 |

Antal sider | 5 |

Forlag | IEEE Press |

Publikationsdato | jul. 2014 |

ISBN (Trykt) | 9781479964161 |

ISBN (Elektronisk) | 9781479964147 |

DOI | |

Status | Udgivet - jul. 2014 |

Begivenhed | IEEE Power & Energy Society General Meeting, PES 2014 - Washington, USA Varighed: 27 jul. 2014 → 31 jul. 2014 |

### Konference

Konference | IEEE Power & Energy Society General Meeting, PES 2014 |
---|---|

Land | USA |

By | Washington |

Periode | 27/07/2014 → 31/07/2014 |

### Fingerprint

### Citer dette

*Proceedings of the IEEE Power & Energy Society General Meeting, PES 2014*IEEE Press. https://doi.org/10.1109/PESGM.2014.6939306

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*Proceedings of the IEEE Power & Energy Society General Meeting, PES 2014.*IEEE Press, Washington, USA, 27/07/2014. https://doi.org/10.1109/PESGM.2014.6939306

**Power System Stability Using Decentralized Under Frequency and Voltage Load Shedding.** / Hoseinzadeh, Bakhtyar; Silva, Filipe Faria Da; Bak, Claus Leth.

Publikation: Bidrag til bog/antologi/rapport/konference proceeding › Konferenceartikel i proceeding › Forskning › peer review

TY - GEN

T1 - Power System Stability Using Decentralized Under Frequency and Voltage Load Shedding

AU - Hoseinzadeh, Bakhtyar

AU - Silva, Filipe Faria Da

AU - Bak, Claus Leth

PY - 2014/7

Y1 - 2014/7

N2 - Load shedding (LS) is the last emergency control action against voltage and frequency instability or even system blackout. In conventional Under Frequency Load Shedding (UFLS) relays, LS is carried out by curtailing a fixed amount of load when the frequency declines below a set of predefined thresholds and hence, may not be adaptive to disturbance scale. Besides, due to equality of the frequency throughout the entire power system, there is the possibility of coincidence operation of relays and perhaps over load shedding. Furthermore, the LS locations are already determined independent of disturbance location. In this paper, to aim adaptive performance of the relays, the amount of load shed in each stage is determined proportional to the measured Rate of Change of Frequency (ROCOF). In order to localize the LS scheme close to the disturbance place, this scheme utilizes the voltage drop information to shed the loads with higher voltage decay first. Therefore, this approach deals with coordination of voltage and frequency information instead of independent methods. Numerical simulations which are carried out in DigSilent PowerFactory software confirm the efficiency of proposed methodology to stabilize the power system after a severe contingency.

AB - Load shedding (LS) is the last emergency control action against voltage and frequency instability or even system blackout. In conventional Under Frequency Load Shedding (UFLS) relays, LS is carried out by curtailing a fixed amount of load when the frequency declines below a set of predefined thresholds and hence, may not be adaptive to disturbance scale. Besides, due to equality of the frequency throughout the entire power system, there is the possibility of coincidence operation of relays and perhaps over load shedding. Furthermore, the LS locations are already determined independent of disturbance location. In this paper, to aim adaptive performance of the relays, the amount of load shed in each stage is determined proportional to the measured Rate of Change of Frequency (ROCOF). In order to localize the LS scheme close to the disturbance place, this scheme utilizes the voltage drop information to shed the loads with higher voltage decay first. Therefore, this approach deals with coordination of voltage and frequency information instead of independent methods. Numerical simulations which are carried out in DigSilent PowerFactory software confirm the efficiency of proposed methodology to stabilize the power system after a severe contingency.

KW - Adaptive under frequency load shedding

KW - Under voltage load shedding

KW - Rate of change of frequency

U2 - 10.1109/PESGM.2014.6939306

DO - 10.1109/PESGM.2014.6939306

M3 - Article in proceeding

SN - 9781479964161

BT - Proceedings of the IEEE Power & Energy Society General Meeting, PES 2014

PB - IEEE Press

ER -