MCQs of State Estimation (Power System Operation and Control - 2180909)

Power System Operation and Control (2180909) MCQs

MCQs of State Estimation

Showing 1 to 10 out of 44 Questions

The objective of state estimation is to obtain the best possible value of

(a)	Bus voltage magnitude and angle
(b)	Bus active power
(c)	Bus reactive power
(d)	Bus apparent power

The most applicable state estimation algorithm is

(a)	Load flow
(b)	Optimum load flow
(c)	Weighted least square
(d)	None of above

What causes imperfect measurement of power system data?

(a)	Error of instruments
(b)	Data loss in transmitting
(c)	Failure of measuring instruments
(d)	All of above

The output of state estimation is used in

(a)	Economical dispatch and security studies
(b)	Load flow
(c)	Analysis of Fault
(d)	Stability Study

As per least square estimation, the estimated value of X (X_est) is represented by (Where Z is measurement vector and H is the linear relation between Z and X)

(a)	$X_{e s t} = {(H^{T} H)}^{- 1} H^{T} H Z$
(b)	$X_{e s t} = {(H^{T} H)}^{- 1} H^{T} Z$
(c)	$X_{e s t} = {(H^{T} H)}^{- 1} H Z$
(d)	None of above

Estimate the two random variables by least square estimation method for a given measurement.

Z = [\begin{matrix} 0.5 \\ 0.45 \\ 0.51 \end{matrix}]

H = [\begin{matrix} 1 \\ 1 \\ 0 \end{matrix} \begin{matrix} 1 \\ 0 \\ 1 \end{matrix}]

(a)	$[\begin{matrix} 0.1 \\ 0.2 \end{matrix}]$
(b)	$[\begin{matrix} 0.29 \\ 0.35 \end{matrix}]$
(c)	$[\begin{matrix} 0.35 \\ 0.22 \end{matrix}]$
(d)	$[\begin{matrix} 0.22 \\ 0.22 \end{matrix}]$

In least square estimation method, The weight-age of error in measurement vector is

(a)	Equal
(b)	Not Equal
(c)	Depend on measurement
(d)	Not easy to define

Which estimation method is best suitable for state estimation in a power system?

(a)	Least square estimation
(b)	Equal Weighted Least square estimation
(c)	Weighted least square estimation
(d)	Fast decoupled

Weighted least square is more accurate than least square because

(a)	Weight on each error is define and use during estimation
(b)	Weighted of measurement is find prior to estimation
(c)	Equal weighted is estimated
(d)	Method is executed with assumption

10.

As per weighted least square estimation, the estimated value of X (X_est) is represented by (Where Z is measurement vector ,H is the linear relation between Z and X, W is Weighted error matrix)

(a)	$X_{e s t} = {(H^{T} W H)}^{- 1} H^{T} Z$
(b)	$X_{e s t} = {(H^{T} W H)}^{- 1} H^{T} W^{T} Z$
(c)	$X_{e s t} = {(H^{T} W H)}^{- 1} H^{T} W Z$
(d)	$X_{e s t} = {(H^{T} W H)}^{- 1} H^{T} W H Z$

Showing 1 to 10 out of 44 Questions