State estimation in power system using weighted least squares method

Puviya, P.; Priyadarshini, Neha

doi:10.1109/iciiecs.2017.8276038

“…The state estimation procedure is performed for an electrical power network by taken into account the set of measurement like voltage measurement, current measurement, power flows, power injections, transformers tap setting. The estimated state variables are used for contingency analysis, penalty factor calculation voltage stability assessment, optimal power flow and load forecasting, on-line system security assessment [4]. Power system network is monitor by many sensors such as phasor measurement units, current transformers, relay and potential transformer.…”

Section: Figure 1 State Estimatormentioning

confidence: 99%

“…Least square estimate is a statistical technique that has been employed in order to minimize or maximize the statistical property of the estimation [3]. The evaluating criteria is based on shrinking the sum of the square between estimated and measured values of a state variable [4]. This unreliability arises from metering errors, error from remote communication.…”

Section: Introductionmentioning

confidence: 99%

System State Estimation Using Weighted Least Square Method

Mohmadishak Sheikh, Chetan Sheth

2023

cienc.eng.

0

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State estimation is an essential part of every energy control management system. Accurate estimation of state or operating state is essential for security control and monitoring of power systems. Power system state estimation is a procedure to estimate true state from the inexact state of a power system. The conventional state estimator provides estimates of the power system states, i.e., bus voltages and angles which is obtained. State estimation is a computational technique for electrical power system. It empowers the calculation of the power flows of the electrical power system which are not observed or not directly measured. State estimation is a computer program that detects, isolate and eliminate the incorrect or bad measurement data and estimates the accurate state. The magnitudes of bus voltage and phase angle are the states variables for an electrical power system. This paper outlines Weighted Least Square (WLS) estimation techniques and simulated estimation for standard IEEE systems.

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“…Power system state estimate must be undertaken to validate the accuracy of the measurements in case of faulty data [2]. Least square estimate is a statistical technique that has been employed in order to minimize or maximize the statistical property of the estimation [3]. The evaluating criteria is based on shrinking the sum of the square between estimated and measured values of a state variable [4].…”

Section: Introductionmentioning

confidence: 99%

Power System State Estimation using Weighted Least Square Method

Chetan Sheth

2023

cienc.eng.

0

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State estimation is an essential part of every energy control management system. Accurate estimation of state or operating state is essential for security control and monitoring of power systems. Power system state estimation is a procedure to estimate true state from the inexact state of a power system. The conventional state estimator provides estimates of the power system states, i.e., bus voltages and angles which is obtained. State estimation is a computational technique for electrical power system. It empowers the calculation of the power flows of the electrical power system which are not observed or not directly measured. State estimation is a computer program that detects, isolate and eliminate the incorrect or bad measurement data and estimates the accurate state. The magnitudes of bus voltage and phase angle are the states variables for an electrical power system. This paper outlines Weighted Least Square (WLS) estimation techniques and simulated estimation for standard IEEE systems.

show abstract