Distributed State Estimation of Hybrid AC/HVDC Grids by Network Decomposition

Donde, Vaibhav; Feng, Xiaoming; Segerqvist, Inger; Callavik, Magnus

doi:10.1109/tsg.2015.2457932

Cited by 29 publications

(19 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As a result a form of quasicentralized or multi-level form of SCADA is existed [10,13,34]. However, after the deployment of the HVDC grids, the AC and DC systems operators-in most of the cases-are not the same, resulting on a fully distributed/decentralized control of the hybrid VSC-HVDC/AC network [3,28,35].…”

Section: The State Estimation Toolboxmentioning

confidence: 99%

“…They argue that the unified approach increase the bad data recognition accuracy and improve the system states presentation. On the other hand, distributed approach AC/DC state estimator is presented in [28], it decomposes the network and uses Lagrangian relaxation based approach and block wise Gauss-Seidel algorithms to solve the SE problem. A comparison between centralized and distributed SE for hybrid AC/DC networks is available in [36].…”

Section: The State Estimation Toolboxmentioning

confidence: 99%

“…Second, the coupling between the AC and DC sides has to be modeled (hence, the converter impact). Third, a robust estimation has to be guaranteed using an AC and DC bad data detection block [19,27,28] or using an estimation algorithm claimed to be robust (e.g., Least Absolute Value (LAV) [29,30]).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

State Estimation for Hybrid VSC Based HVDC/AC Transmission Networks

2020

View full text Add to dashboard Cite

As the integration of High Voltage Direct Current (HVDC) systems on modern power networks continues to expand, challenges have appeared in different fields of the network architecture. In the Supervisory, Control and Data Acquisition (SCADA) field, software and toolboxes are expected to be modified to meet the new network characteristics. Therefore, this paper presents a unified Weighted Least Squares (WLS) state estimation algorithm suitable for hybrid HVDC/AC transmission systems, based on Voltage Source Converter (VSC). The mathematical formulas of the unified approach are derived for modelling the AC, DC and converter coupling components. The method couples the AC and DC sides of the converter through power and voltage constraints and measurement functions. Two hybrid power system test cases have been studied to validate this work, a 4-AC/4-DC/4-AC network and Cigre B4 DC test case network. Furthermore, comparison between the fully decentralized state estimation and the unified method is provided, which indicated an accuracy improvement and error reduction.

show abstract

Section: The State Estimation Toolboxmentioning

confidence: 99%

Section: The State Estimation Toolboxmentioning

confidence: 99%

See 1 more Smart Citation

State Estimation for Hybrid VSC Based HVDC/AC Transmission Networks

2020

View full text Add to dashboard Cite

show abstract

“…For this reason, it is essential to rely on state estimators for computing the maximum likelihood state of the network from the raw field measurements [76]. However, suitable models for the specific case of HVDC systems have recently been developed [77][78][79].…”

Section: Control Algorithmsmentioning

confidence: 99%

Ancillary Services in Hybrid AC/DC Low Voltage Distribution Networks

et al. 2019

View full text Add to dashboard Cite

In the last decade, distribution systems are experiencing a drastic transformation with the advent of new technologies. In fact, distribution networks are no longer passive systems, considering the current integration rates of new agents such as distributed generation, electrical vehicles and energy storage, which are greatly influencing the way these systems are operated. In addition, the intrinsic DC nature of these components, interfaced to the AC system through power electronics converters, is unlocking the possibility for new distribution topologies based on AC/DC networks. This paper analyzes the evolution of AC distribution systems, the advantages of AC/DC hybrid arrangements and the active role that the new distributed agents may play in the upcoming decarbonized paradigm by providing different ancillary services.

show abstract

“…In [12], an alternative approach is presented where the whole AC/DC network is handled simultaneously by using a decoupled formulation. In [13], a sequential SE algorithm with coupling Gain submatrices between AC and DC grids is presented, whereas [14] proposes a distributed solution based on a Lagrangian relaxation approach. In all the cases, the losses of the converters binding the AC and DC systems are not explicitly taken into account.…”

Section: State Estimationmentioning

confidence: 99%

A state estimation algorithm for hybrid AC/DC networks with multi-terminal DC grid

Pau

Shrivastava

Suresh

et al. 2016

2016 IEEE PES Innovative Smart Grid Technologies Conference Europe (ISGT-Europe)

View full text Add to dashboard Cite

Hybrid AC/DC grids have been recently proposed as an efficient solution to accommodate increasing amounts of renewable energy sources in future smart grids. Similarly to the traditional power systems, state estimation algorithms are necessary in AC/DC grids to acquire awareness about the operating conditions of the system and to enable proper operation of the control tools. This paper presents a state estimator tailored for hybrid AC/DC grids with multi-terminal dc grid configuration. The proposed estimator is based on a twostep algorithm, which uses the boundary results of the AC and the DC grid to enhance the accuracy of the estimation. Results on a simple test network are presented to show the validity of the proposed estimator and to highlight the inherent benefits.

show abstract

Distributed State Estimation of Hybrid AC/HVDC Grids by Network Decomposition

Cited by 29 publications

References 18 publications

State Estimation for Hybrid VSC Based HVDC/AC Transmission Networks

State Estimation for Hybrid VSC Based HVDC/AC Transmission Networks

Ancillary Services in Hybrid AC/DC Low Voltage Distribution Networks

A state estimation algorithm for hybrid AC/DC networks with multi-terminal DC grid

Contact Info

Product

Resources

About