A New, Fast Technique for Load-Flow Solution of Integrated Multi-Terminal DC/AC Systems

El-Marsafawy, Magdy; Mathur, R.M.

doi:10.1109/tpas.1980.319634

Cited by 65 publications

(32 citation statements)

References 3 publications

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“…The solution methods for HVDC power flow are generally divided in sequential and unified methods. The unified (simultaneous) method was originally suggested by Arrillaga [13]and co-workers.The AC and DC system are solved together [14], [15], the DC equations along with the power flow equations, consequently solving the combined set simultaneously. The sequential method was proposed by Reeve et al [16].…”

Section: Introductionmentioning

confidence: 99%

Power Flow Solution on Multi-Terminal HVDC Systems: Supergrid Case

González-Longatt¹,

Roldan²,

Charalambous³

2024

RE&PQJ

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Abstract. High Voltage Direct Current (HVDC) systemsoffer distinct advantages for the integration of offshore wind farms to inland grid system. HVDC transmission system based on Voltage Source Converter (VSC) enables multi-terminal use HVDC for the integration of large-scale wind power in the North Sea. That network requires a special formulation for power flow analysis as opposed to the conventional method employed on AC networks. This paper presents a sequential AC/DC power flow algorithm, which is proposed for the analysis of multi-terminal VSC HVDC (VSC-MTDC) systems. This sequential power flow method can be implemented easily in an existing AC power flow package and is very flexible when compared with unified methods. Gauss-Siedel is used to solve DC power balance equations, as it offers two keys advantages: very fast and simple computational implementation, and errors do not accumulate during the calculation. The algorithm is tested using the WSCC 3-machine, 9-bus system with a 3-terminal MTDC network and the results are compared with those obtained from DIgSILENT  PowerFactoryTM demonstrating the validity of the proposed algorithm. As an aggregate value, a representative test case of the projected scheme for the phase I of the Supergrid project on the North Sea is presented. The proposed approach presented in this paper is used to calculate DC power flows for some scenarios.

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Section: Introductionmentioning

confidence: 99%

Power Flow Solution on Multi-Terminal HVDC Systems: Supergrid Case

González-Longatt¹,

Roldan²,

Charalambous³

2024

RE&PQJ

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“…The other is that this algorithm can be developed for balanced and unbalanced situations and run with current, voltage, and power controlled terminals without changing anything. A new technique for power flow analysis of integrated AC-DC systems was proposed in [3]. Here a fast decoupled load flow technique is used, and entire AC-DC system equations are handled simultaneously.…”

Section: Introductionmentioning

confidence: 99%

A new approach for optimal reactive power flow of MTDC systems using the ABC algorithm

Kılıç¹,

Ayan²

2017

Turk J Elec Eng & Comp Sci

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This paper presents a new approach to optimize reactive power flow of multiterminal high voltage direct current (HVDC) systems. Successful application of two-terminal DC systems worldwide makes the use of multiterminal direct current (MTDC) systems more attractive. Due to the economic and technical advantages of HVDC technology, MTDC systems have been used extensively in recent years. In this study, the artificial bee colony (ABC) algorithm is used for solution of the optimal reactive power flow problem of MTDC systems. In opposition to the current-balancing method used in the literature, this study represents a new approach for DC system power flow calculations. The proposed approach is tested on a sample IEEE MTDC test system. The results by the proposed approach are compared with those reported in the literature. Thus, the applicability and the efficiency of this approach used together with the ABC algorithm are shown.

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“…For planning, operation and control of power systems with HVDC links, power-flow solution of power systems incorporated with HVDC links is required [4][5][6]. For power flow solution of hybrid AC-DC systems, corresponding to each converter, five quantities are required to be solved.…”

Section: Introductionmentioning

confidence: 99%

“…These are known as the unified and the sequential method, respectively. Some excellent research works on the unified and the sequential power flow methods are presented in [4][5][6][7][8][9][10][11][12][13][14][15], respectively. Unlike the unified method, the sequential method is easier to implement and poses lesser computational burden due to the smaller size of the Jacobian matrix.…”

Section: Introductionmentioning

confidence: 99%

Impact of DC link control strategies on the power-flow convergence of integrated AC–DC systems

Khan

Bhowmick

2016

Ain Shams Engineering Journal

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For the power-flow solution of integrated AC-DC systems, five quantities are required to be solved per converter, against three independent equations available. These three equations consist of two basic converter equations and one DC network equation, corresponding to each converter. Thus, for solution, two additional equations are required. These two equations are derived from the control specifications adopted for the DC link. Depending on the application, several combinations of valid control specifications are possible. A set of valid control specifications constitutes a control strategy. It is observed that the control strategy adopted for the DC link strongly affects the power-flow convergence of integrated AC-DC systems. This paper investigates how different control strategies affect the power flow convergence of integrated AC-DC systems. Sequential method is used to solve the DC variables in the Newton Raphson (NR) power flow model. Seven typical control strategies have been taken into consideration. This is validated by numerous case studies carried out with multiple DC links incorporated in the IEEE 118-bus and 300-bus test systems. Ó 2015 Faculty of Engineering, Ain Shams University. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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A New, Fast Technique for Load-Flow Solution of Integrated Multi-Terminal DC/AC Systems

Cited by 65 publications

References 3 publications

Power Flow Solution on Multi-Terminal HVDC Systems: Supergrid Case

Power Flow Solution on Multi-Terminal HVDC Systems: Supergrid Case

A new approach for optimal reactive power flow of MTDC systems using the ABC algorithm

Impact of DC link control strategies on the power-flow convergence of integrated AC–DC systems

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