An observation method based on N-1 simulation for distribution system security region

Xiao, Jun; Wei, Guo; Zu, Guoqiang; Gong, Xiaoxu; Li, Fangxing; Bai, Linquan

doi:10.1109/pesgm.2016.7741472

Cited by 3 publications

(2 citation statements)

References 13 publications

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“…The Cholesky method can be used to decompose it T L = ρ QQ (15) where, Q is the lower triangular matrix. ② Eliminate the correlation of L 1 -= G Q L (16) where, the correlation coefficient matrix of G is the identity matrix. ③ Break down 0 ρ 0 T = ρ PP (17) where, P is the lower triangular matrix.…”

Section: ) Samplingmentioning

confidence: 99%

“…Among all the control strategies, the distribution network fault reconfiguration can adjust the network topology structure in real time according to the system operation status [14]- [16], which has important practical significance. There are a lot of researches on distribution network fault reconfiguration at home and abroad: in normal operation state, distribution network fault reconfiguration aims to minimize network loss or load balance; in emergency state, distribution network reconfiguration is a means of fault recovery, with the minimum number of switching operations or maximum load-bearing total supply recovery as the goal [17].…”

Section: Introductionmentioning

confidence: 99%

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Fault Reconfiguration Strategies of Active Distribution Network With Uncertain Factors for Maximum Supply Capacity Enhancement

Wang

Sheng²,

Qiu³

et al. 2022

IEEE Access

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With a large number of distributed generation connected to the distribution network, the total supply capacity of the distribution network has been improved to a certain extent. However, due to the randomness of its output, it also brings some challenges to the reliable operation of the distribution network and the restoration of power supply after failure. Based on this, this paper proposes an active distribution network reconfiguration strategy with uncertain factors for maximum total supply capacity improvement. Firstly, the evaluation index of the maximum total supply capacity of distribution network is constructed, and the maximum total supply capacity index under the current operation mode is evaluated online through the calculation model of maximum total supply capacity based on N-1 security criterion. Then, the uncertainty of wind power, photovoltaic and electric vehicle DG and the stochastic model of prosumer load are considered, random variables are generated by Latin hypercube sampling (LHS) and their correlation is considered. Then, it introduces that the position of sectionalizing switch and tie switch can be adjusted according to the dispatching demand. Based on the evaluation index of maximum total supply capacity and DG output of uncertain factors, the active reconfiguration model of distribution network after fault is proposed. Finally, a calculation example illustrates the effectiveness and correctness of the model in this paper. It is demonstrated that the model can optimize the selection strategy of section switch and tie switch after the fault of distribution network, improve the utilization rate of distributed energy, and give full play to the power supply recovery potential of distribution network and reduce the outage time of prosumer groups. INDEX TERMS maximum total supply capacity; distributed generation; uncertain factors; Latin hypercube sampling; Distribution network reconfiguration after fault;

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Section: ) Samplingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fault Reconfiguration Strategies of Active Distribution Network With Uncertain Factors for Maximum Supply Capacity Enhancement

Wang

Sheng²,

Qiu³

et al. 2022

IEEE Access

View full text Add to dashboard Cite

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Rapid assessment of maximum distributed generation output based on security distance for interconnected distribution networks

Liu

Cheng

Zeng

et al. 2018

International Journal of Electrical Power & Energy Systems

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Schedule Strategy Considering the Overload Violation Risk to the Security Region in Distribution Networks

et al. 2022

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Due to the uncertainty of the nodal power caused by the varying renewable energies and the variety of loads, the line power of the distribution network (DN) is uncertainty also. In extreme scenarios, the line power may exceed the loading limits and incur overload violations. In this paper, a risk analysis specifically for overload violations based on the security region of the DN is established. This method takes the N-0 security of the DN as the reference to determine the bidirectional security region and violation distances. The calculation of the probability distribution of the overload violation in the distribution lines is established according to the distribution of node injections of the DN by using the semi-invariant algorithm. By referring to the security boundaries, the optimization model of the anti-violation strategy to minimize the cost of anti-violation is derived, by which the severity of violation risk events is obtained accordingly. Assessment of the risk cost is built with the CVaR index for violation events. Based on the above algorithms, the risk-tolerated scheduling model of the DN is arrived at with the objective of minimizing the comprehensive risk cost and operating cost. Finally, the validity of the proposed method is verified by a modified IEEE 33-node example.

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An observation method based on N-1 simulation for distribution system security region

Cited by 3 publications

References 13 publications

Fault Reconfiguration Strategies of Active Distribution Network With Uncertain Factors for Maximum Supply Capacity Enhancement

Fault Reconfiguration Strategies of Active Distribution Network With Uncertain Factors for Maximum Supply Capacity Enhancement

Rapid assessment of maximum distributed generation output based on security distance for interconnected distribution networks

Schedule Strategy Considering the Overload Violation Risk to the Security Region in Distribution Networks

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