A Novel Control Method on Single Phase Grid Connectable Inverter with Hilbert Transformer

Saitou, Makoto; Shimizu, T.

doi:10.1541/ieejias.121.1089

Cited by 39 publications

(20 citation statements)

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“…As an application example of the instantaneous phase estimation of a single-phase signal, we consider a voltagefed inverter connected to a power system, with current control regarding the phase shift with a single-phase system voltage [10,11].…”

Section: System Configurationmentioning

confidence: 99%

“…Thus, it is robust to frequency fluctuations but vulnerable to noise and harmonics. In phase estimation using the Hilbert transform, approximation errors and time delays are inevitable because the rectangular filter required for the transform is noncausal in the ideal state [10,11]. On the other hand, the DFT offers causal operation and the influence of harmonics can be reduced.…”

Section: Introductionmentioning

confidence: 99%

“…The DFT is applied to the data thus sampled, and the real part and imaginary part of the first frequency point after the transform are used for instantaneous estimation of the original signal phase (see Note 4 in Section 2.3) [11]. The transform itself is simple but hundreds of sums of products must be calculated for phase estimation at one sampling instant, which is a significant computing load.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A new mapping method for phase estimation of single‐phase signals: A new generalization and new realizations of the DFT estimation method

Shinnaka

2007

Electrical Engineering Japan

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SUMMARYThis paper proposes and analyzes a new simple realtime phase-estimation method for single-phase signals, which is based on a vector mapping theory of n-dimensional to 2-dimensional vectors. According to the analyses, the proposed mapping method can estimate instantly and properly the true phase of the signals that are contaminated by significant amplitude of noise and harmonics. The mapping method contains the conventional DFT method as a special case. In other words, it can be treated as a generalization of the DFT. Several simple realizations of the mapping method are also newly proposed as a single-input and two-output digital mapping filter in both nonrecursive and recursive forms. The recursive realization being able to decrease drastically computing load utilizes the normal form that is robust to finite word length effects. As an application of the proposed mapping method, inverter-using power control system connected with a single-phase grid is shown. All analytical results are verified by numerical experiments and the usefulness of the newly proposed mapping method is confirmed.

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Section: System Configurationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A new mapping method for phase estimation of single‐phase signals: A new generalization and new realizations of the DFT estimation method

Shinnaka

2007

Electrical Engineering Japan

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“…This makes it possible to handle a single-phase value v N in the d-q coordinates [9]. At this point, using the d-q coordinates and the method described in Ref.…”

Section: Mitigation Control Of the Third Harmonic Voltagementioning

confidence: 99%

Control methods and compensation characteristics of a series active filter for neutral conductor

Inoue

Wãda

Shimizu

2006

Electrical Engineering Japan

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SUMMARYWith an increase in the number of electronic devices, such as personal computers, connected to power distribution lines in commercial buildings, problems associated with their use, such as voltage distortion on utility outlets and excessive neutral current on the distribution lines, become more and more serious. This paper shows control methods and compensation characteristics of series active filters connected to the neutral conductor. The distinctive functions of the proposed active filter are the mitigation of third harmonic voltage and the reduction of neutral current in three-phase four-wire distribution systems. The required kVA rating of the proposed active filter is less than 10% of that of the harmonic producing leads. A control method of the DC capacitor voltage on the active filter circuit is also described. It was experimentally demonstrated that one of these two functions of the active filter (to mitigate harmonics or to reduce the neutral current) can be realized selectively and that the DC capacitor voltage of the active filter can be regulated to a desired value.

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“…There are several methods to generate two-phase signals from a single-phase signal, for example, using a complex coefficient filter (8) , Hilbert transformation (9) , a second-order generalized integrator (10) , phase-lag elements, and a double decoupled synchronous reference frame (DDSRF) (11) . Among these, the DDSRF directly derives positive and negative sequence signals in reference frames from a singlephase signal, by using positive and negative transformation matrices.…”

Section: Introductionmentioning

confidence: 99%

Virtual Synchronous Generator Control with Double Decoupled Synchronous Reference Frame for Single-Phase Inverter

et al. 2015

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Several virtual synchronous generator (VSG) controls for three-phase inverters have been proposed in order to extend the advantages of synchronous generators to inverters. The VSG controls facilitate smooth transitions between the grid-connected mode and the island mode. The governor and the automatic voltage regulator (AVR) realized in the VSG stabilize the frequency and the voltage respectively in the island mode. In addition, they can control the active and reactive power of the inverter in the grid-connected mode. The objective of this paper is to extend these useful properties of VSG to single-phase inverters. The proposed single-phase inverter with a VSG is based on two synchronous d-q reference frames, i.e., the positive and negative sequences. The double decoupled synchronous reference frame (DDSRF) theory is applied to generate these two reference frames. The simulation and experimental results indicate that the properties of a three-phase inverter with a VSG can be extended to a single-phase inverter effectively.

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A Novel Control Method on Single Phase Grid Connectable Inverter with Hilbert Transformer

Cited by 39 publications

References 0 publications

A new mapping method for phase estimation of single‐phase signals: A new generalization and new realizations of the DFT estimation method

A new mapping method for phase estimation of single‐phase signals: A new generalization and new realizations of the DFT estimation method

Control methods and compensation characteristics of a series active filter for neutral conductor

Virtual Synchronous Generator Control with Double Decoupled Synchronous Reference Frame for Single-Phase Inverter

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