Reliability Equivalence and Sensitivity Analysis to UHVDC Systems Based on the Matrix Description of the F&amp;D Method

Li, Shenghu; Ma, Yongtao; Hua, Yuting; Chen, Peng

doi:10.1109/tpwrd.2015.2396037

Cited by 25 publications

(24 citation statements)

References 12 publications

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“…• The equipment outage due to non-self-reasons, such as failure of other equipment, is defined as 'passive outage' [21]. As shown in the red dashed rectangle of Figure 4 Step 5: deduce state space matrix and solve steady probability.…”

Section: Reliability Equivalence Of Uhvdc Transmission Systemmentioning

confidence: 99%

“…Reference [20] quantified the reliability of the converter transformers for the double 12-pulse UHVDC transmission system with the state space and F&D method. In reference [21], an improved F&D method is proposed to fully and progressively consider the topology of the whole UHVDC bipolar system. However, the state space structure of the model is so complex that the calculation can be time-consuming and the state enumeration and transition matrix are prone to bring about some state omissions.…”

Section: Introductionmentioning

confidence: 99%

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Reliability Equivalence to Symmetrical UHVDC Transmission Systems Considering Redundant Structure Configuration

Jiang

Ding

et al. 2018

Energies

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Abstract:In recent years, the ultra-high voltage direct current (UHVDC) transmission system has been developed rapidly for its significant long-distance, high-capacity and low-loss properties. Equipment failures and overall outages of the UHVDC system have increasingly vital influence on the power supply of the receiving end grid. To improve the reliability level of UHVDC systems, a quantitative selection and configuration approach of redundant structures is proposed in this paper, which is based on multi-state reliability equivalence. Specifically, considering the symmetry characteristic of an UHVDC system, a state space model is established as a monopole rather than a bipole, which effectively reduces the state space dimensions to be considered by deducing the reliability merging operator of two poles. Considering the standby effect of AC filters and the recovery effect of converter units, the number of available converter units and corresponding probability are expressed with in universal generating function (UGF) form. Then, a sensitivity analysis is performed to quantify the impact of component reliability parameters on system reliability and determine the most specific devices that should be configured in the redundant structure. Finally, a cost-benefit analysis is utilized to help determine the optimal scheme of redundant devices. Case studies are conducted to demonstrate the effectiveness and accuracy of the proposed method. Based on the numerical results, configuring a set of redundant transformers is indicated to be of the greatest significance to improve the reliability level of UHVDC transmission systems.

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Section: Reliability Equivalence Of Uhvdc Transmission Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Reliability Equivalence to Symmetrical UHVDC Transmission Systems Considering Redundant Structure Configuration

Jiang

Ding

et al. 2018

Energies

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show abstract

“…The contingencies in the PAA consider the scheduled or forced outages of the generators, transmission lines etc. Up to now, few studies of the reliability evaluation on the AC/UHVDC system are available, and the related models are focused on the UHVDC line itself [3][4][5][6]. The connected AC systems, and the mutual impacts between the UHVDC and AC systems are not considered.…”

Section: Introductionmentioning

confidence: 99%

Sensitivity‐based optimal reliability design of AC/UHVDC systems

Zhang

et al. 2019

IET Generation, Transmission & Distribution

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“…Hence, the UHVDC line has more operation modes and capacity levels, i.e. the bipolar mode (100%), 3/4 bipolar mode (75%), monopolar mode (50%), 1/2 bipolar mode (2 × 25%), and 1/2 monopolar mode (25%) [14]. Different operation modes may change the coefficients of the mismatch equations (MEs) and the equivalent powers, thus need to be differentiated in power flow modelling.…”

Section: Introductionmentioning

confidence: 99%