PMU-assisted overcurrent protection for distribution feeders employing Solid State Transformers

Hooshyar, Hossein; Baran, Mesut; Firouzi, Seyed Reza; Vanfretti, Luigi

doi:10.1016/j.segan.2017.02.003

Cited by 17 publications

(13 citation statements)

References 31 publications

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“…The locations of PMUs are: buses 2, 8, 11, 15, 17, 20, 24, 26, 30, 32. Considering the cost and state estimation accuracy comprehensively, the compromise solution is selected by TOPSIS. The compromise solution needs 11 PMUs, and the locations are buses 2,4,8,11,15,17,20,24,26,30,32. In order to reflect the influence of network compression on OPP, this paper uses the single variable method to compare two cases, the result of the comparison is shown in Table 1.…”

Section: Simulation Results and Discussionmentioning

confidence: 99%

“…where x (k+1) and x (k) are the state variable vectors obtained by the k − th and (k + 1) − th iterations respectively. Newton method is applied to solve the iterative Equations (8). The estimated state vectorx can be obtained when the convergence criterion is satisfied.…”

Section: The Basic Model Of State Estimationmentioning

confidence: 99%

“…Sci. 2019, 9, 1515 2 of 22 but also can quickly deal with problems such as anomaly detection [7], overcurrent protection [8], steady-state model synthesis [9], network topology detection [10], reliability analysis [11] and so on. Reference [7] proposes a layered architecture for monitoring networks based on the PMU measurements and establishes a set of analyses and sensor primitives to detect anomalous behavior in the control perimeter.…”

mentioning

confidence: 99%

“…Reference [7] proposes a layered architecture for monitoring networks based on the PMU measurements and establishes a set of analyses and sensor primitives to detect anomalous behavior in the control perimeter. Reference [8] proposes a scheme to enhance the traditional overcurrent protection scheme by using PMU functions embedded in solid state transformer and feeder protection relay. The proposed solution not only can enable the relay to operate correctly at its original range but also can maintain coordination with each other.…”

mentioning

confidence: 99%

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Multi Objective for PMU Placement in Compressed Distribution Network Considering Cost and Accuracy of State Estimation

et al. 2019

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A phasor measurement unit (PMU) can provide phasor measurements to the distribution network to improve observability. Based on pre-configuration and existing measurements, a network compression method is proposed to reduce PMU candidate locations. Taking the minimum number of PMUs and the lowest state estimation error as the objective functions and taking full observability of distribution network as the constraint, a multi objective model of optimal PMU placement (OPP) is proposed. A hybrid state estimator based on supervisory control and data acquisition (SCADA) and PMU measurements is proposed. To reduce the number of PMUs required for full observability, SCADA measurement data are also considered into the constraint by update and equivalent. In addition, a non-dominated sorting genetic algorithm-II (NSGA-II) is applied to solve the model to get the Pareto set. Finally, the optimal solution is selected from the Pareto set by the technique for order preference by similarity to ideal solution (TOPSIS). The effectiveness of the proposed method is verified by IEEE standard bus systems.

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Section: Simulation Results and Discussionmentioning

confidence: 99%

Section: The Basic Model Of State Estimationmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Multi Objective for PMU Placement in Compressed Distribution Network Considering Cost and Accuracy of State Estimation

et al. 2019

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“…2, it is quite limited with two-stage SST compared to the typical fault current with a two-level VSC that can potentially impact existing protection performance. For example, the research in [21] and [22] have concluded that the constraints on the SST's contribution to the fault current can have a significant impact on the operation and coordination of overcurrent relays. In response to this, a number of DC voltage-based protection methods have been proposed and developed by different researchers for protecting DC systems against limited prospective fault currents.…”

Section: Protection Challenges Of a Sst-interfaced Lvdc Distribution mentioning

confidence: 99%

Improved voltage‐based protection scheme for an LVDC distribution network interfaced by a solid state smart transformer

Wang

Emhemed²,

Burt

2019

IET Generation, Transmission & Distribution

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The increasing electrification of transport and heat will place increasing demand on low voltage (LV) networks with the potential to overload MV/LV transformers and LV cables. Deployment of a solid state transformer (SST) at MV/LV substations and using LV Direct Current (LVDC) distribution systems offer great potential to address such c hallenges. However, the SST deployment in addition to the introduction of LVDC will fundamentally change LV fault behaviour and protection requirements due to the limited short-circuit capabilities of such technologies. The SST will deliver limited fault c urrents, making currentbased protection (widely used in LV networks) less reliable. Therefore, this paper presents an advanced communication-less protection scheme which can effectively detect and locate DC faults even with reduced fault levels. The devel oped protection scheme overcomes the selectivity limitations in LVDC voltage-based protection solutions by using a combination of DC voltage magnitude, voltage concavity (sign of d 2 v/dt 2) and the sign of the rate of change of current (di/dt) regardless of the current magnitudes. The credibility of the developed protection algorithm is tested against different fault scenarios applied on an active LVDC network model built in PSCAD/EMTDC. Noise signals have been included in the simulation to appraise the resilience of the developed scheme.

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Solid‐state transformers: An overview of the concept, topology, and its applications in the smart grid

Shadfar

Pashakolaei

Foroud

2021

Int Trans Electr Energ Syst

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The development of power systems and the move to smart grid have increased the need for new technologies. In this regard, solid-state transformers have been proposed as a suitable alternative to conventional transformers. Solidstate transformers are among the equipment based on power electronic converters that in addition to better performance than conventional transformers provide a variety of other services. In this article, the concept and types of solid-state transformer topologies and configurations and their applications, especially in smart grid, are investigated. Studies show that the various characteristics of solid-state transformers have led to much consideration as potential transformers in smart grid applications, the integration of distributed generation sources, modern traction systems, and so on.

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PMU-assisted overcurrent protection for distribution feeders employing Solid State Transformers

Cited by 17 publications

References 31 publications

Multi Objective for PMU Placement in Compressed Distribution Network Considering Cost and Accuracy of State Estimation

Multi Objective for PMU Placement in Compressed Distribution Network Considering Cost and Accuracy of State Estimation

Improved voltage‐based protection scheme for an LVDC distribution network interfaced by a solid state smart transformer

Solid‐state transformers: An overview of the concept, topology, and its applications in the smart grid

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