Integral Sliding Mode Control for Uncertainty Mitigation in Switched Boost Inverters
01 Feb 2020-
TL;DR: The integral sliding mode control (ISMC) is proposed to mitigate the matched uncertainties such as the disturbances from input channel and measurement uncertainties in the switched boost inverters.
Abstract: The switched boost inverters (SBIs) are single stage inverter topologies which can boost the output ac voltage unlike the traditional voltage source inverters. The SBIs are used to feed ac and dc loads. The performance of SBIs is degraded due to parametric uncertainties or some unknown disturbances. The integral sliding mode control (ISMC) is proposed to mitigate the matched uncertainties such as the disturbances from input channel and measurement uncertainties. The proposed control improves the dynamic response of the SBI in case of some disturbance. The proposed control law is added with the dual loop control law to obtain the shoot through duty cycle. The proposed control is verified to mitigate disturbances in- shoot through duty cycle, disturbance in voltage measurement and current measurement, through simulation.
References
More filters
11 Dec 1996
TL;DR: The paper generalized a new sliding mode design concept, namely integral sliding mode (ISM), and removes the discontinuous control action from the real control path and inserts it to an internal dynamic process for generating the sliding mode to alleviate chattering.
Abstract: The paper generalized a new sliding mode design concept, namely integral sliding mode (ISM). The order of the motion equation in ISM is equal to the order of the original system, rather than reduced by the number of dimension of the control input. As the result, robustness of the system can be guaranteed throughout an entire response of the system starting from the initial time instance. Uniform formulations of the ISM design principle are developed in the paper. It is shown through examples that our generalized ISM scheme enables a wide scope of application areas. In the case that the given control matrix can not be used directly for generating the sliding mode, the associated decoupling problem was also discussed based on the concept of sliding mode transformation. To alleviate chattering, we remove the discontinuous control action from the real control path and insert it to an internal dynamic process for generating the sliding mode.
838 citations
"Integral Sliding Mode Control for U..." refers background or methods in this paper
...To implement the proposed methodology, the upper bound of uncertainties must be known [9]....
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...The purpose of ISMC is to mitigate dm(t, x) without amplifying du(t, x) [9], [10]....
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TL;DR: This note shows how to select the projection matrix in such a way that the euclidean norm of the resulting perturbation is minimal, which is particularly useful if integral sliding-mode control is to be combined with other methods to further robustify against unmatched perturbations.
Abstract: The robustness properties of integral sliding-mode controllers are studied. This note shows how to select the projection matrix in such a way that the euclidean norm of the resulting perturbation is minimal. It is also shown that when the minimum is attained, the resulting perturbation is not amplified. This selection is particularly useful if integral sliding-mode control is to be combined with other methods to further robustify against unmatched perturbations. H/sub /spl infin// is taken as a special case. Simulations support the general analysis and show the effectiveness of this particular combination.
535 citations
"Integral Sliding Mode Control for U..." refers background in this paper
...The purpose of ISMC is to mitigate dm(t, x) without amplifying du(t, x) [9], [10]....
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TL;DR: A novel topology called switched boost inverter (SBI) is proposed which exhibits similar advantages of ZSI with lower number of passive components and more active components compared to ZSI, and its steady-state and small-signal analyses have been discussed.
Abstract: The Z-source inverter (ZSI) employs an LC impedance network between the main inverter bridge and the power source. The unique feature of the ZSI is that it can operate either in buck or boost mode with a wide range of obtainable output voltages from a given input voltage. This topology also exhibits better electromagnetic-interference noise immunity when compared to a traditional voltage-source inverter (VSI). However, the LC impedance network of ZSI significantly increases the size and cost of the power converter and can make it unsuitable for low-power applications. This paper proposes a novel topology called switched boost inverter (SBI) which exhibits similar advantages of ZSI with lower number of passive components and more active components compared to ZSI. The steady-state and small-signal analyses of SBI, along with its pulsewidth modulation (PWM) control strategies, have been discussed in this paper. This paper also presents a comparison of SBI and ZSI with the same input and output parameters. The theoretical analysis given in this paper has been validated using a laboratory prototype of SBI, and the experimental results are presented for verification. The experimental harmonic spectrum of the inverter's output voltage with the proposed PWM technique is also plotted and compared with that of a traditional VSI. All the experimental results show good correlation between theory and experiments.
242 citations
"Integral Sliding Mode Control for U..." refers background or methods in this paper
...Different configurations of SBIs have been proposed in literature with different benefits....
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...During this mode the diodes D1 and D2 are in open state, and the switch S5, inverter legs are in closed state [2]....
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...In SBIs, the dc bus voltage is controlled and the output ac voltage is controlled [3], [4]....
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...The SBIs consists of lesser components compared to the ZSIs, while operational advantages of ZSIs are retained....
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...Depending on the requirements topologies such as- Watkins–Johnson topology of SBIs [2], Current fed SBI [5],Coupled inductor SBI [6] etc....
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TL;DR: The algorithm to control linearly the capacitor voltage is suggested in order to improve the transient response for DC boost control of the Z-source inverter.
Abstract: This paper aims to achieve good performance for both the dc boost and the ac output voltage control of the Z-source inverter (ZSI). The algorithm to control linearly the capacitor voltage is suggested in order to improve the transient response for dc boost control of the ZSI. The peak value of the ac output voltage is used to control exactly the ac output voltage to its desired level. A modified space vector pulsewidth modulation scheme is applied to control the shoot-through time for boosting dc voltage. The proposed algorithms are verified with simulation and experiment with a 32-bit digital signal processor.
203 citations
"Integral Sliding Mode Control for U..." refers background in this paper
...In SBIs, the dc bus voltage is controlled and the output ac voltage is controlled [3], [4]....
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TL;DR: This paper presents a new topology of uninterruptible power supply (UPS) by using a Z-source inverter, where a symmetrical LC network is employed to couple the main power circuit of an inverter to a battery bank.
Abstract: This paper presents a new topology of uninterruptible power supply (UPS) by using a Z-source inverter, where a symmetrical LC network is employed to couple the main power circuit of an inverter to a battery bank. With this new topology, the proposed UPS can maintain the desired ac output voltage at the significant voltage drop of the battery bank with high efficiency, low harmonics, fast response, and good steady-state performance in comparison with traditional UPSs. The simulation and experimental results of a 3-kW UPS with the new topology confirm its validity.
199 citations
"Integral Sliding Mode Control for U..." refers background in this paper
...As a result of this, Zsource inverters (ZSIs) were proposed [1]....
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