Reactive power impact on reliability of 220kV Taiyuan Power System

Qin, Wenping; Wang, P.; Song, Jian; Wang, Z.

doi:10.1109/pmaps.2010.5528900

Cited by 7 publications

(3 citation statements)

References 21 publications

(15 reference statements)

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“…The program can be used to evaluate any power systems with the limited buses. The modified IEEE 30-bus system [20] and a practical power system [21] are analysed as examples to illustrate the proposed technique. Failures up to the second order have been considered in the analysis.…”

Section: System Studiesmentioning

confidence: 99%

Operational reliability assessment of power systems based on bus voltage

Qin

Song

Han

et al. 2015

IET Generation, Transmission & Distribution

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Bus voltage is a direct reliability indicator of a transmission network because it is related to system reactive and active power balance especially during a contingency state. This study proposes a technique to evaluate network operational reliability based on bus voltage. Two new voltage related bus reliability indices are proposed to represent bus reliability. Network reliability levels under various operating conditions and contingency states are evaluated and presented by probabilities of system voltage being in normal, under-voltage, critical and collapse zones. The probabilistic voltage margin to the collapse point for each bus is evaluated to provide information for system operator regarding the risk under system random failures and load uncertainty. The IEEE 30-bus system and a practical 220 kV Taiyuan power system in Shanxi Province of China have been analysed to illustrate the proposed techniques.

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Section: System Studiesmentioning

confidence: 99%

Operational reliability assessment of power systems based on bus voltage

Qin

Song

Han

et al. 2015

IET Generation, Transmission & Distribution

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show abstract

“…Separate reactive power indices have been introduced in [17]- [19]. Tracing and locating long-term voltage instability risk in power system planning is proposed in [21].…”

Section: Voltage and Reactive Power Limitsmentioning

confidence: 99%

A risk sensitivity-based approach to hardening power systems against catastrophic failures

Benidris

Elsaiah

Mitra

2014

2014 North American Power Symposium (NAPS)

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This paper introduces a method based on risk sensitivity analysis to determine strategies to harden power systems against catastrophic failures. The proposed method utilizes sensitivity analysis of the risk index with respect to the control variables to identify vulnerabilities that can be corrected by strategic or tactical measures. For any initiating event, the sensitivity of the risk of load curtailments with respect to the power quality constraints such as voltage and reactive power is derived, and thereby preventive/correction actions are determined. In this paper, in addition to the insertion of compensation equipments, rescheduling of generation is considered to increase the reactive power reserve. In order to evaluate the sensitivity of the risk index with respect to the power quality constraints, voltage and reactive power constraints are incorporated with a non-linear programming optimization problem with an objective of minimum load curtailments. The model is applied on a modified version of the IEEE Reliability Test System (IEEE-MRTS). Results are reported, discussed, and thoroughly analyzed.

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“…Several methods have been recently introduced in the literature of power system reliability to investigate the effects of lack of reactive power support on the reliability indices. For example, using the AC power flow model in 'two steps' to study the aspects of the reactive power on the composite system reliability has been introduced in [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Reliability and sensitivity analysis of composite power systems considering voltage and reactive power constraints

Benidris¹,

Mitra²

2015

IET Generation, Transmission & Distribution

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This study investigates the effects of voltage and reactive power constraints on composite system reliability indices. Four indices have been used to assess the sensitivity of load curtailments to voltage and reactive power constraints. Furthermore, expressions to evaluate the sensitivity of the severity indices with respect to the voltage and reactive power constraints have been developed. Extensive simulations on the Institute of Electrical and Electronics Engineers (IEEE) reliability test system based on the AC power flow model were carried out to correlate the violations of these limits and the loading level of the system. A non-linear, AC power flow-based model has been used to accurately represent system redispatch. A state space reduction technique has been utilised to reduce the computation time. A comparison between redispatch models using AC and DC power flow has been provided to illustrate the benefits of the more accurate AC flow model and to investigate the effects of the voltage and reactive power constraints on reliability indices.

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Reactive power impact on reliability of 220kV Taiyuan Power System

Cited by 7 publications

References 21 publications

Operational reliability assessment of power systems based on bus voltage

Operational reliability assessment of power systems based on bus voltage

A risk sensitivity-based approach to hardening power systems against catastrophic failures

Reliability and sensitivity analysis of composite power systems considering voltage and reactive power constraints

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