### 抄録

This paper describes an optimal load-shedding method which can be applied to local buses in order to suppress voltage deviations, based on local information obtained at each bus. When a generation outage occurs, adequate amounts of loads must be shed within a few seconds in order to maintain the balance between supply and demand. This method is able to decide quickly the optimal amounts of loads to be shed after the fault. The proposed method is based on the fact that the location of the fault can be estimated exclusively from power flow deviations at local buses, measured after the outage. Because the amounts of load to be shed have constraints, it is necessary to find the optimal factors which decide the amounts of load-shedding at each bus by quadratic programming. To solve this problem we first linearize the study system. Next, in order to relate power flows to voltage deviations at each bus, the voltage sensitivity factors obtained by ac power flow calculation are evaluated. Numerical simulations with 4-machine and 9-machine power system models show the effectiveness of the proposed method. It distributes adequate loads which are almost identical to the completely optimized loads, and it produces smaller voltage deviations than the conventional method. Improved transient characteristics of voltage deviations are also demonstrated.

元の言語 | English |
---|---|

ページ（範囲） | 35-43 |

ページ数 | 9 |

ジャーナル | Electrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi) |

巻 | 119 |

発行部数 | 1 |

出版物ステータス | Published - 1997 |

外部発表 | Yes |

### Fingerprint

### ASJC Scopus subject areas

- Electrical and Electronic Engineering

### これを引用

*Electrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi)*,

*119*(1), 35-43.

**Local optimal load-shedding with allowance for voltage deviation.** / Fujita, Goro; Shirai, Goro.

研究成果: Article

*Electrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi)*, 巻. 119, 番号 1, pp. 35-43.

}

TY - JOUR

T1 - Local optimal load-shedding with allowance for voltage deviation

AU - Fujita, Goro

AU - Shirai, Goro

PY - 1997

Y1 - 1997

N2 - This paper describes an optimal load-shedding method which can be applied to local buses in order to suppress voltage deviations, based on local information obtained at each bus. When a generation outage occurs, adequate amounts of loads must be shed within a few seconds in order to maintain the balance between supply and demand. This method is able to decide quickly the optimal amounts of loads to be shed after the fault. The proposed method is based on the fact that the location of the fault can be estimated exclusively from power flow deviations at local buses, measured after the outage. Because the amounts of load to be shed have constraints, it is necessary to find the optimal factors which decide the amounts of load-shedding at each bus by quadratic programming. To solve this problem we first linearize the study system. Next, in order to relate power flows to voltage deviations at each bus, the voltage sensitivity factors obtained by ac power flow calculation are evaluated. Numerical simulations with 4-machine and 9-machine power system models show the effectiveness of the proposed method. It distributes adequate loads which are almost identical to the completely optimized loads, and it produces smaller voltage deviations than the conventional method. Improved transient characteristics of voltage deviations are also demonstrated.

AB - This paper describes an optimal load-shedding method which can be applied to local buses in order to suppress voltage deviations, based on local information obtained at each bus. When a generation outage occurs, adequate amounts of loads must be shed within a few seconds in order to maintain the balance between supply and demand. This method is able to decide quickly the optimal amounts of loads to be shed after the fault. The proposed method is based on the fact that the location of the fault can be estimated exclusively from power flow deviations at local buses, measured after the outage. Because the amounts of load to be shed have constraints, it is necessary to find the optimal factors which decide the amounts of load-shedding at each bus by quadratic programming. To solve this problem we first linearize the study system. Next, in order to relate power flows to voltage deviations at each bus, the voltage sensitivity factors obtained by ac power flow calculation are evaluated. Numerical simulations with 4-machine and 9-machine power system models show the effectiveness of the proposed method. It distributes adequate loads which are almost identical to the completely optimized loads, and it produces smaller voltage deviations than the conventional method. Improved transient characteristics of voltage deviations are also demonstrated.

KW - Load-shedding

KW - Optimization

KW - Power flow calculation

KW - Power generation outage

KW - Quadratic programming

KW - Voltage sensitivity coefficient

UR - http://www.scopus.com/inward/record.url?scp=0031120532&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0031120532&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0031120532

VL - 119

SP - 35

EP - 43

JO - Electrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi)

JF - Electrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi)

SN - 0424-7760

IS - 1

ER -