An adaptive optimal control strategy for dynamic stability enhancement of AC/DC power systems

Rostamkolai, N.; Phadke, A.G.; Long, Wenkun; Thorp, James S.

doi:10.1109/59.14574

Cited by 31 publications

(7 citation statements)

References 10 publications

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“…This section describes the classical quasi-steady state model succinctly [31]. First of all, it is necessary to introduce the assumptions for classical QSS model as follows:…”

Section: Converter Bridge Modelmentioning

confidence: 99%

Modified Quasi-Steady State Model of DC System for Transient Stability Simulation under Asymmetric Faults

Liu

Wei

Fang

et al. 2015

Mathematical Problems in Engineering

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As using the classical quasi-steady state (QSS) model could not be able to accurately simulate the dynamic characteristics of DC transmission and its controlling systems in electromechanical transient stability simulation, when asymmetric fault occurs in AC system, a modified quasi-steady state model (MQSS) is proposed. The model firstly analyzes the calculation error induced by classical QSS model under asymmetric commutation voltage, which is mainly caused by the commutation voltage zero offset thus making inaccurate calculation of the average DC voltage and the inverter extinction advance angle. The new MQSS model calculates the average DC voltage according to the actual half-cycle voltage waveform on the DC terminal after fault occurrence, and the extinction advance angle is also derived accordingly, so as to avoid the negative effect of the asymmetric commutation voltage. Simulation experiments show that the new MQSS model proposed in this paper has higher simulation precision than the classical QSS model when asymmetric fault occurs in the AC system, by comparing both of them with the results of detailed electromagnetic transient (EMT) model of the DC transmission and its controlling system.

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“…This section describes the classical quasi-steady state model succinctly [31]. First of all, it is necessary to introduce the assumptions for classical QSS model as follows:…”

Section: Converter Bridge Modelmentioning

confidence: 99%

Modified Quasi-Steady State Model of DC System for Transient Stability Simulation under Asymmetric Faults

Liu

Wei

Fang

et al. 2015

Mathematical Problems in Engineering

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“…For example, the authors in [7] proposed a robust control scheme for a parallel AC/DC system. In [8], an adaptive optimal control was developed for an HVDC system.…”

Section: Introductionmentioning

confidence: 99%

Synchronverter-Based Emulation and Control of HVDC Transmission

Aouini

Marinescu

Kilani

et al. 2016

IEEE Trans. Power Syst.

150

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International audienceThis paper presents a new control strategy for High Voltage Direct Current (HVDC) transmission based on the synchronverter concept: the sending-end rectifier controls emulate a synchronous motor (SM), and the receiving end inverter emulates a synchronous generator (SG). The two converters connected with a DC line provide what is called a Synchronverter HVDC (SHVDC). The structure of the SHVDC is firstly analyzed. It is shown that the droop and voltage regulations included in the SHVDC structure are necessary and sufficient to well define the behavior of SHVDC. The standard parameters of the SG cannot be directly used for this structure. A specific tuning method of these parameters is proposed in order to satisfy the usual HVDC control requirements. The new tuning method is compared with the standard vector control in terms of local performances and fault critical clearing time (CCT) in the neighboring zone of the link. The test network is a 4 machine power system with parallel HVDC/AC transmission. The results indicate the contribution of the proposed controller to enhance the stability margin of the neighbour AC zone of the link

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“…Although, conventional controls are lack robustness and become difficult to implement especially for cases in which: different controllers are to be coordinated for a variety of operating conditions, and certain performance specifications have to be satisfied. Consequently, to overcome the undesired problems probably encountered by PI conventionally tuned controllers under operating conditions variations and to guarantee system stability, different robust controllers design [5] and adaptive control structures have been proposed [6].…”

Section: Introductionmentioning

confidence: 99%

Improvement of transient stability in an AC/DC system with synchronverter based HVDC

Aouini¹,

Marinescu

Kilani³

et al. 2015

2015 IEEE 12th International Multi-Conference on Systems, Signals &Amp; Devices (SSD15)

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International audienceThe HVDC emulation by the synchronverter concept is investigated in a realistic power system. A specific tuning method for the parameters of the regulators based on the sensitivity of the poles of the neighbor zone of the HVDC with the respect to the latter parameters is used. As consequence, not only the local performances of the HVDC link, but also overall transient stability of the AC zone in which the HVDC is inserted are improved. Extensive tests are provided using Matlab/Simulink implementation of the IEEE 9 bus/3 machines test system

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An adaptive optimal control strategy for dynamic stability enhancement of AC/DC power systems

Cited by 31 publications

References 10 publications

Modified Quasi-Steady State Model of DC System for Transient Stability Simulation under Asymmetric Faults

Modified Quasi-Steady State Model of DC System for Transient Stability Simulation under Asymmetric Faults

Synchronverter-Based Emulation and Control of HVDC Transmission

Improvement of transient stability in an AC/DC system with synchronverter based HVDC

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