Multi-Timescale Active and Reactive Power-Coordinated Control of Large-Scale Wind Integrated Power System for Severe Wind Speed Fluctuation

Ouyang, Jinxin; Li, Mengyang; Zhang, Zhen; Tang, Ting

doi:10.1109/access.2019.2911587

Cited by 40 publications

(31 citation statements)

References 21 publications

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“…If the grid voltage is stable, in the 0 dq coordinate system, the calculated reference current is compared with the actual current output by the grid to obtain the current deviation value [31]. After the PI regulator, the command voltage is obtained, and then the rotating coordinate system is transformed to the static coordinate system.…”

Section: Figure 5 Control Structure Of Grid-connected Inverter Combimentioning

confidence: 99%

Second-Order Linear Active Disturbance Rejection Control and Stability Analysis of Energy Storage Grid-Connected Inverter

Yang

Zhou

et al. 2020

IEEE Access

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At present, which has gradually become a technical development trend that the energy storage grid-connected inverter system is connected to the grid to ensure the stable operation of the whole system. However, the stability of the energy storage system itself is also very important for the safe operation of the power grid. Therefore, improving the stability of grid-connected energy storage system is still the key technology of current research. Aiming at the strong coupling and low-voltage ride-through fault of grid-connected system, a second-order mathematical model of grid-connected control system is established. Based on its state space model, a linear extended state observer (LESO) for state observation and a linear state error feedback (LSEF) control law for disturbance estimation are designed. The secondorder linear active disturbance rejection control (LADRC) is introduced into the voltage loop, the stability of the second-order LADRC controller is proved by the Lyapunov stability theory, and the stability conditions are given. Finally, the simulation model of the grid-connected energy storage system is built on the MATLAB / Simulink digital platform, and the low-voltage ride-through fault is designed on the gridside. The simulation results show that the effect of the second-order LADRC control is better than that of the traditional PI control obviously, which reflects the superiority of the second-order LADRC in controlling the grid-side low-voltage ride-through fault. INDEX TERMS Energy storage grid-connected inverter system，Linear active disturbance rejection control technology，Linear extended state observer，Lyapunov stability theory，Low-voltage ridethrough

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Section: Figure 5 Control Structure Of Grid-connected Inverter Combimentioning

confidence: 99%

Second-Order Linear Active Disturbance Rejection Control and Stability Analysis of Energy Storage Grid-Connected Inverter

Yang

Zhou

et al. 2020

IEEE Access

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“…A conditional intra-region probability function is introduced, as shown in (24), to indicate the intra-region probability under certain initial conditions within (0, t].…”

Section: Conditional Intra-region Probability Functionmentioning

confidence: 99%

“…It can be seen that the Casimir function value is always in the region, so it is not necessary to consider it in the intra-region probability. Furthermore, the intra-region probability function (24) becomes as: It can be seen that the Casimir function value is always in the region, so it is not necessary to consider it in the intra-region probability. Furthermore, the intra-region probability function (24) becomes as:…”

Section: Case Studymentioning

confidence: 99%

“…In the power systems, there are many new researches on the power systems control [21][22][23][24][25], but the influence of random factors was not considered. For a power system under the influence of stochastic factors, some analyses were done based on the stochastic averaging method [1,3,14,15,26,27], but the design of the controller was not involved.…”

Section: Introductionmentioning

confidence: 99%

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Stochastic Control for Intra-Region Probability Maximization of Multi-Machine Power Systems Based on the Quasi-Generalized Hamiltonian Theory

Lin

Sun

et al. 2019

Energies

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With the penetration of renewable generation, electric vehicles and other random factors in power systems, the stochastic disturbances are increasing significantly, which are necessary to be handled for guarantying the security of systems. A novel stochastic optimal control strategy is proposed in this paper to reduce the impact of such stochastic continuous disturbances on power systems. The proposed method is effective in solving the problems caused by the stochastic continuous disturbances and has two significant advantages. First, a simplified and effective solution is proposed to analyze the system influenced by the stochastic disturbances. Second, a novel optimal control strategy is proposed in this paper to effectively reduce the impact of stochastic continuous disturbances. To be specific, a novel excitation controlled power systems model with stochastic disturbances is built in the quasi-generalized Hamiltonian form, which is further simplified into a lower-dimension model through the stochastic averaging method. Based on this Itô equation, a novel optimal control strategy to achieve the intra-region probability maximization is established for power systems by using the dynamic programming method. Finally, the intra-region probability increases in controlled systems, which confirms the effectiveness of the proposed control strategy. The proposed control method has advantages on controlling the fluctuation of system state variables within a desired region under the influence of stochastic disturbances, which means improving the security of stochastic systems. With more stochasticity in the future, the proposed control method based on the stochastic theory will play a novel way to relieve the impact of stochastic disturbances.

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“…However, owing to the volatility and intermittency natures of wind power generation, the problems in wind energy industry in terms of increasing peak shaving complexity, reducing output power quality as well as depraving system operation stability exist. As a result, friendly grid-connected wind power consumption is hindered and severe wind electrical energy abandonment happens in many countries [3]- [4]. In renewable energy market, most WTs work with the mode of variable speed constant frequency (VSCF) to shrink the impacts on power system and to improve the capacity factor of wind farms.…”

Section: Introductionmentioning

confidence: 99%

Analysis, Modeling and Control of a Hybrid Drive Wind Turbine With Hydrogen Energy Storage System

2020

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Hybrid drive wind power generation system, equipped with the speed regulating differential mechanism (SRDM), is able to be friendly connected to power grid without the need of partly-or fullyrated converters. The novel transmission schemes can promote not only the output power quality but also the low voltage ride through (LVRT) capability of the existing wind turbines (WTs). For the purpose of further improving the grid-connected operating performances of SRDM-based WT, this paper aims to develop a hybrid power production unit, in which the hydrogen storage system (HSS), comprising an electrolyzer, a hydrogen fuel cell and a supercapacitor, is integrated into SRDM-based WT. The basic architecture and numerical modelling methods of key subsystems in SRDM-based WT as well as in HSS are analyzed. After determining the eight different operating modes, a power supervision approach is synthesized for the proposed SRDM-based WT with HSS, by which the power flow management between energy sources and storage elements can be realized. Case studies are carried out in the presence of different randomly varying wind speeds and grid voltage faults. The satisfactory operating performances of the proposed wind-hydrogen hybrid system in terms of maximizing wind energy utilization, suppressing output power fluctuation and improving system continuous operating stability are verified.

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Multi-Timescale Active and Reactive Power-Coordinated Control of Large-Scale Wind Integrated Power System for Severe Wind Speed Fluctuation

Cited by 40 publications

References 21 publications

Second-Order Linear Active Disturbance Rejection Control and Stability Analysis of Energy Storage Grid-Connected Inverter

Second-Order Linear Active Disturbance Rejection Control and Stability Analysis of Energy Storage Grid-Connected Inverter

Stochastic Control for Intra-Region Probability Maximization of Multi-Machine Power Systems Based on the Quasi-Generalized Hamiltonian Theory

Analysis, Modeling and Control of a Hybrid Drive Wind Turbine With Hydrogen Energy Storage System

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