A Fixed Length Adaptive Moving Average Filter-Based Synchrophasor Measurement Algorithm for P Class PMUs

Han, Xue; Ruan, Mengjie; Cheng, Yifan

doi:10.3390/en12214168

Cited by 6 publications

(3 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The esCCO is calculated from 64 heartbeat-averaged PWTTs which were based on data retrieved within every 1-second interval [16]. Therefore, the esCCO is considered as real-time hemodynamic monitoring including a 32-heartbeat delay as almost half of 64 heartbeats [17]. In contrast, a characteristic of a continuous TDCO is the presence of a delayed time response derived from the averaging process [18].…”

Section: Outcome Measurementsmentioning

confidence: 99%

Accuracy of a noninvasive estimated continuous cardiac output measurement under different respiratory conditions: a prospective observational study

et al. 2023

View full text Add to dashboard Cite

PurposeRecently, the estimated continuous cardiac output (esCCO) system was developed as a noninvasive hemodynamic monitoring alternative to the thermodilution cardiac output (TDCO). However, the accuracy of continuous cardiac output measurements by the esCCO system compared with TDCO under different respiratory conditions remains unclear. This prospective study aimed to assess the clinical accuracy of the esCCO system by continuously measuring the esCCO and TDCO. MethodsForty patients who had undergone cardiac surgery with a pulmonary artery catheter were enrolled. We compared the esCCO with TDCO from mechanical ventilation to spontaneous respiration through extubation. Patients undergoing cardiac pacing during esCCO measurement, those receiving treatment with an intra-aortic balloon pump, and those with measurement errors or missing data were excluded. In total, 23 patients were included. Agreement between the esCCO and TDCO measurements was evaluated using Bland-Altman analysis with a 20-minute moving average of the esCCO. ResultsThe paired esCCO and TDCO measurements (939 points before extubation and 1112 points after extubation) were compared. The respective bias and standard deviation (SD) values were 0.13 L/min and 0.60 L/min before extubation and −0.48 L/min and 0.78 L/min after extubation. There was a signi cant difference in bias before and after extubation (P<0.001); the SD before and after extubation was not signi cant (P=0.315). The percentage errors were 25.1% before extubation and 29.6% after extubation, which is the criterion for acceptance of a new technique. ConclusionThe accuracy of esCCO system is clinically acceptable to that of TDCO under mechanical ventilation and spontaneous respiration.

show abstract

Section: Outcome Measurementsmentioning

confidence: 99%

Accuracy of a noninvasive estimated continuous cardiac output measurement under different respiratory conditions: a prospective observational study

et al. 2023

View full text Add to dashboard Cite

show abstract

“…The esCCO is calculated from 64 heartbeat-averaged PWTTs, which were based on data retrieved within every 1-second interval [16]. Therefore, the esCCO is considered as a real-time hemodynamic monitoring including a 32 heartbeat delay as almost half of 64 heartbeats [17]. However, a characteristic of a continuous TDCO is the presence of a delayed time response derived from the averaging process [18].…”

Section: Outcome Measurementsmentioning

confidence: 99%

Accuracy of a noninvasive estimated continuous cardiac output measurement under different respiratory conditions: a prospective observational study

Takakura

Fujii

Taniguchi

et al. 2022

Preprint

View full text Add to dashboard Cite

Purpose Recently, the estimated continuous cardiac output (esCCO) system was developed as a noninvasive hemodynamic monitoring alternative to thermodilution cardiac output (TDCO). However, the accuracy of CCO measurements by the esCCO compared with TDCO under different respiratory conditions remains unclear. This prospective study aimed to assess the clinical accuracy of the esCCO by continuously measuring the esCCO and TDCO. Methods This study enrolled 40 patients who had undergone cardiac surgery with pulmonary artery catheterization. We compared the esCCO with TDCO from mechanical ventilation to spontaneous respiration through extubation. Patients undergoing cardiac pacing during the esCCO measurement, those receiving treatment with an intra-aortic balloon pump, and those with measurement errors or missing data were excluded. On the basis of these criteria, 23 patients were included. Agreement between the esCCO and TDCO was evaluated using Bland–Altman analysis with a 20-minute moving average of the esCCO. Results The paired esCCO and TDCO measurements (939 points before extubation and 1112 points after extubation) were compared. The respective bias and standard deviation (SD) values were 0.13 L/min and 0.60 L/min before extubation and − 0.48 L/min and 0.78 L/min after extubation. There was a significant difference in bias before and after extubation (P < 0.001); the SD before and after extubation was not significant (P = 0.315). The percentage errors were 25.1% before extubation and 29.6% after extubation, which is the criterion for acceptance of a new technique. Conclusion The accuracy of esCCO measurement is clinically acceptable to that of TDCO under mechanical ventilation and spontaneous respiration. This study was registered with the UMIN Clinical Trials Registry on September 1st, 2021 (identifier: UMIN000044712).

show abstract

“…Equation 3shows that the MAF suffers a response delay of T w . Typically, a smaller T w selected means a shorter MAF response delay; however, the filtering performance is also dependent on T w [23].…”

Section: Maf Characteristicsmentioning

confidence: 99%

Enhanced Grid-Connected Phase-Locked Loop Based on a Moving Average Filter

et al. 2020

View full text Add to dashboard Cite

Moving average filter (MAF)-based phase-locked loops (PLLs) have received considerable attention in recent years due to their attractive features. Indeed, they are able to completely eliminate the unwanted effect of harmonics, dc offset, and unbalanced voltages. Unfortunately, these advantages come at the cost of open-loop bandwidth reduction, which worsens the system's dynamic response. The main challenge is to estimate the phase and frequency timely and precisely from an imbalanced and distorted voltage. In addition, optimized parameter design is also a difficult issue. The main aim of this paper is to present an enhanced PLL based on a moving average filter (EMAF-PLL) and a control method with a novel compensation algorithm. The EMAF-PLL can maintain high performance even under harsh grid conditions, and the novel control method enables the designer to set the controller parameters simply and effectively. The design method compensates the PLL small-signal model to form a type-II classic system and then optimizes the control-loop design by the rules of type-II systems. Finally, experimental investigations are performed to validate the effectiveness of the EMAF-PLL. The experimental results are also presented, and comparison with conventional PLLs verifies that the dynamic performance can be significantly improved. INDEX TERMS Moving average filter (MAF), phase-locked loops (PLLs), type-II classic system, utility grid synchronization.

show abstract

A Fixed Length Adaptive Moving Average Filter-Based Synchrophasor Measurement Algorithm for P Class PMUs

Cited by 6 publications

References 36 publications

Accuracy of a noninvasive estimated continuous cardiac output measurement under different respiratory conditions: a prospective observational study

Accuracy of a noninvasive estimated continuous cardiac output measurement under different respiratory conditions: a prospective observational study

Accuracy of a noninvasive estimated continuous cardiac output measurement under different respiratory conditions: a prospective observational study

Enhanced Grid-Connected Phase-Locked Loop Based on a Moving Average Filter

Contact Info

Product

Resources

About