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Machine learning-based fast frequency response control for a vsc-hvdc system

CSEE Journal of Power and Energy systems 2021年第4期7卷 688-697页

作者： Kaiqi Sun Huangqing Xiao Shengyuan Liu Yilu Liu University of Tennessee KnoxvilleTN 37996USA University of Tennessee KnoxvilleTN 37996USA and also with the Oak Ridge National LaboratoryOak RidgeTN 37831USA

hvdc system can realize a very fast frequency response to the disturbed system under a contingency because its active power control is decoupled from the frequency ***,most of existing hvdc frequency control strategies are coupled with system primary frequency control and secondary frequency *** the traditional system frequency control is dominated by the thermal generators,the advantage of the fast response of the hvdc system is not made fully *** development of a frequency response estimation based on a machine learning algorithm provides another approach to improve the frequency response capability of the hvdc *** from other frequency deviation tracking strategies,a machine learning based hvdc frequency response control can directly increase the power flow of a hvdc system by estimation of the system generator or load *** this paper,a fast frequency response control using a hvdc system for a large power system disturbance based on the multivariate random forest regression(MRFR)algorithm is *** simulation is carried out with an integrated power system model based on the North American *** simulation results indicate that the proposed MRFR based frequency response control can significantly improve the frequency low point during an event,while stabilizing the frequency in advance.

关键词： Frequency response control multivariate random forest regression vsc-hvdc system

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Analysis of Additional Damping Control Strategy and Parameter Optimization for Improving Small Signal Stability of vsc-hvdc system

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Energy Engineering 2023年第4期120卷 931-948页

作者： Hui Fang Jingsen Zhou Hanjie Liu Yanxu Wang Hongji Xiang Yechun Xin State Grid Chongqing Electric Power Company Research Institute Chongqing401120China Northeast Electric Power University Jilin132000China

The voltage source converter based high voltage direct current(vsc-hvdc)system is based on voltage source converter,and its control system is more *** affected by the fast control of power electronics,oscillation phenomenon in wide frequency domain may *** address the problem of small signal stability of the vschvdc system,a converter control strategy is designed to improve its small signal stability,and the risk of system oscillation is reduced by attaching a damping controller and optimizing the control *** on the modeling of the vsc-hvdc system,the general architecture of the inner and outer loop control of the vschvdc converter is established;and the damping controllers for DC control and AC control are designed in the phase-locked loop and the inner and outer loop control parts respectively;the state-space statemodel of the control system is established to analyze its *** the electromagnetic transient simulation model is built on the PSCAD/EMTDC simulation platform to verify the accuracy of the small signal *** influence of the parameters of each control part on the stability of the system is *** main control parts affecting stability are optimized for the phenomenon of oscillation due to changes in operation mode occurring on the AC side due to faults and other reasons,which effectively eliminates system oscillation and improves system small signal stability,providing a certain reference for engineering design.

关键词： vsc-hvdc system small signal modeling eigenvalue analysis parameter optimization

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Adaptive Fractional-Order PID Control for vsc-hvdc systems via Cooperative Beetle Antennae Search with Offshore Wind Integration

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Energy Engineering 2021年第2期118卷 265-284页

作者： Pulin Cao Haoran Fan Zilong Cai Faculty of Electric Power Engineering Kunming University of Science and TechnologyKunming650500China

Since the voltage source converter based high voltage direct current(vsc-hvdc)systems owns the features of nonlinearity,strong coupling and multivariable,the classical proportional integral(PI)control is hard to obtain content control ***,a new perturbation observer based fractional-order PID(PoFoPID)control strategy is designed in this paper for(vsc-hvdc)systems with offshore wind integration,which can efficiently boost the robustness and control performance of entire ***,it employs a fractional-order PID(FoPID)fra-mework for the sake of compensating the perturbation estimate,which dramatically boost the dynamical responds of the closed-loop system,and the cooperative beetle antennae search(CBAS)algorithm is adopted to quickly and effi-ciently search its best control ***,CBAS algorithm is able to efficiently escape a local optimum because of a suitable trade-off between global exploration and local exploitation can be *** last,comprehensive case studies are carried out,namely,active and reactive power tracking,5-cycle line-line-line-ground(LLLG)fault,and offshore wind farm *** results validate superiorities and effectiveness of PoFoPID control in com-parison of that of PID control and feedback linearization sliding-mode control(FLSMC),respectively.

关键词： Perturbation observer based fractional-order PID vsc-hvdc system cooperative beetle antennae search offshore wind integration

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