Accurate estimation of the dynamic states a synchronous machine (e.g., rotor's angle and speed) is essential in monitoring controlling transient stability power system. It well known that covariance matrixes process noise (Q) measurement (R) have significant impact on Kalman filter's performance estimating states. The conventional ad-hoc approaches for are not adequate achieving best filtering performance. To address this problem, paper proposes an adaptive approach to adaptively estimate Q...

Power system dynamic state estimation (DSE) remains an active research area. This is driven by the absence of accurate models, increasing availability fast-sampled, time-synchronized measurements, and advances in capability, scalability, affordability computing communications. paper discusses advantages DSE as compared to static estimation, implementation differences between two, including measurement configuration, modeling framework support software features. The important roles are...

Accurate estimation of dynamic states (such as synchronous machine rotor angle and speed) is critical for monitoring controlling transient stability. Extended Kalman filter (EKF)-based approaches have been developed estimating states. In order to improve the EKF's performance in a machine, this paper proposes multi-step adaptive interpolation (MSAI) approach achieve balance between accuracy computational time. This consists three major steps. First, two indexes are calculated quantify...

In this paper a novel hybrid method for islanding detection of inverter- based distributed generation is proposed. This algorithm which combination Slip mode frequency-shift (SMS) and reactive power versus frequency (Q-f) as active methods detects the phenomena by forcing DG lose its stable operation drift out allowed normal range relays. A simple passive scheme that relies on relays such under/over protection (UFP/OFP) would be sufficient to detect moment islanding. For demonstrating...

A solar panel tilt angle plays a great role in the performance of which is either fixed at an optimal or continuously adjusted using tracking system. Solar systems are not cost efficient especially for residential usage. On other hand, results huge loss energy. One resort to solve this problem adjust limited number times. In paper, novel procedure proposed select intervals and their durations by solving optimisation problem. The algorithm consisted four major steps. First, radiation next...

This paper investigates the performance of Slip mode frequency shift (SMS) islanding detection method (IDM) in presence different inverter interface control strategies (IICS). The Impact two constant-current and constant-power IICS when inverters are equipped with SMS-IDM, compared analyzed from detecting point view. study is based on time-domain simulations MATLAB/Simulink. Performance SMS-IDM tested under UL-1741 test condition. results prove that, efficiency can be degraded by power...

To select optimal locations for placing phasor measurement units (PMU), in this paper, a two-step convex optimization approach to attain the full network observability of power system both normal operation conditions and controlled islanding is proposed. The objective get minimum number PMUs which guarantees with maximum redundancy. In first step, minimization model applied programing (cvx) determine all possible candidate buses, ensures observability. second cases multiple solutions,...

Accurate estimation of dynamic states is important for monitoring and controlling transient stability. This paper proposes an adaptive interpolation approach to improve the performance Extended Kalman Filter (EKF) estimating a synchronous machine. consists two major steps. First, non-linearity state transition function measurement quantified. Second, when severe, pseudo measurements are added through mitigate negative impact on accuracy. Using 2-area model, it shown that proposed can make...

This paper proposes a two-step optimization approach for optimal placement of phasor measurement unit (PMU) to obtain complete observability power system in the case preinstalled PMUs. The normal operation and pre-installed PMUs is formulated then, different contingency conditions are considered, i.e. single line outage bus outage. At first step proposed approach, minimization model applied convex programing (cvx) achieve minimum number which guarantees system. second step, simulated...

This paper proposes a transfer function method to locate sources of forced oscillations using phasor measurement unit (PMU) data. Forced herald problematic controls and device failure. They also incur stability concerns power grid operators. To mitigate the negative impacts oscillations, it is essential their in time. oscillation by building functions between bus frequencies PMU It shown through analytical simulation studies that relative location an source with respect points can be...

This paper proposes a novel hybrid approach for islanding detection of inverter-based distributed generations (DG) based on combination the Slip mode frequency-shift (SMS) as an active and rate change frequency (ROCOF) relay over/under passive methods. is utilized to force DG lose its stable operation drift out allowed range threshold. Performance proposed evaluated under IEEE 1547, UL 1741 multiple-DG operation. The simulation results demonstrate effectiveness islanding, especially loads...

In this paper a comprehensive study is carried out on the optimal number of intervals for adjusting tilt angle solar panel. The panels important capturing radiation and it depends path sun in location A Bee Algorithm used to compute given period. main goal show instead using tracking system, which costly residential usage, manual adjustment panel certain times during year sufficient receive most radiation. This performed different locations across US with latitudes longitudes. each computed...

Power system dynamic state estimation is essential to monitoring and controlling power stability. Kalman filtering approaches are predominant in of synchronous machine states (i.e. rotor angle speed). This paper proposes an adaptive multi-step prediction (AMSP) approach improve the extended filter's (EKF) performance estimating a machine. The proposed consists three major steps. First, two indexes defined quantify nonlinearity levels transition function measurement function, respectively....

This paper proposes a novel hybrid islanding detection method for inverter-based distributed generation (DG) based on frequency drift. algorithm is combination of Sandia frequency-shift, reactive power versus and deviation as active methods, over/under protection passive method. The performance the proposed evaluated under UL 1741 anti-islanding tests configuration, IEEE 1547, load switching, quality factor multiple-DG operation. simulation results are derived by MATLAB/ Simulink. Based...

In this paper, daily and yearly performance of a solar panel for residential usage is improved. To end, an optimization problem proposed solved to find the optimal periods given number intervals. It shown that limited tilt angle adjustments can significantly increase maximum power production if intervals are chosen properly. Therefore, paper proposes three steps algorithm period each interval. First, interval computed by using Bee Algorithm (BA). Second, formed get new all intervals, which...

Power electronic converters enable wind turbines, operating at variable speed, to generate electricity more efficiently. Among speed turbine generators, permanent magnetic synchronous generator (PMSG) has got attentions due low cost and maintenance requirements. In addition, the converter in a with PMSG decouples from power grid, which favors them for grid codes. this paper, performance of back-to-back (B2B) control system is investigated on faulty grid. The switching strategy side designed...

Model validation is crucial for maintaining power-grid efficiency and reliability because models are the foundation of many operation planning applications. The model process implemented by Southwest Power Pool (SPP) presented in this paper. To set up proper steady-state operational conditions a model, generations, loads external networks adjusted to match snapshot an extracted from energy management system (EMS). power flows all transmission lines of100 kV above compared between two cases....

Accurate and robust estimation of dynamic states is essential for monitoring controlling a power grid. To achieve higher accuracy robustness, this study proposes hybrid approach to estimate the synchronous generators using multiple models, classified into set local models wide‐area model. The proposed approach, first, estimates extended Kalman filter based on model Then, at each time step, probability indexes, which quantify likelihood both are determined hypothesis testing measurements...

Model validation is an essential task to determine whether a model can accurately describe the actual behaviours of power system.Currently, major commercial software tools are equipped with 'event playback' function validate dynamic models using testing data from phasor measurement units (PMUs).Due their limited bandwidth and low sampling rates, PMUs cannot capture fast-transient dynamics.As such, playback conventional approach may mistakenly invalidate accurate during high-frequency...

Since the cost of transformer can be divided into 50-60% for material, and rest being labor costs modest profit, therefore as major amount transformers is related to its raw materials, so it has a high importance in estimating process. This paper presents new method estimate pricing. The based on multilayer perceptron neural network (MPNN) with sigmoid transfer function. back-propagation (BP) algorithm used adjust parameters MPNN. required training data MPNN are obtained information from...

Accurate information about dynamic states (such as rotor angle and speed of a synchronous machine) is important for monitoring controlling power system rotor-angle stability. In this paper, multi-model adaptive Kalman filtering (MMAKF) approach proposed to accurately robustly estimate states. This consists three major steps: (i) multiple approaches, i.e., the extended filter (EKF), unscented (UKF), ensemble (EnKF), cubature (CKF), are run concurrently in parallel generator using phasor...

This paper proposes a novel hybrid approach for islanding detection of inverter-based distributed generations (DG) based on combination the Slip mode frequency-shift (SMS) as an active and rate change frequency (ROCOF) relay over/under passive methods. is utilized to force DG lose its stable operation drift out allowed range threshold. Performance proposed evaluated under IEEE 1547, UL 1741 multiple-DG operation. The simulation results demonstrate effectiveness islanding, especially loads...

Load modeling has a significant impact on power system performance. Integration of renewable energy and management systems significantly changed the load compositions. The composite models (CMLD) with aggregated distribution resources (DER-A) have been recently become available in commercial software to represent dynamic characteristics. This paper studied trajectory sensitivity CMLD DER-A model. Trajectory indexes (TSI) defined parameters are divided 5 categories non-sensitive,...