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

Power System Operation and Control (2180909) MCQs

MCQs of State Estimation

Showing 11 to 20 out of 44 Questions

11.

The covariance of error of estimation is (

L = {(H^{T} W H)}^{- 1} H^{T} W

and R= covariance of error vector ‘r’)

(a)	$L R L^{T}$
(b)	$L R^{T} L$
(c)	$L R L$
(d)	None of above

12.

For better estimation, the covariance of the error of estimation is

(a)	High
(b)	Low
(c)	Medium
(d)	0

13.

Estimate the two random variables by weighted 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}]

with weighted matrix

W = [\begin{matrix} 1 & 0 & 0 \\ 0 & 0.5 & 0 \\ 0 & 0 & 0.1 \end{matrix}]

(a)	$[\begin{matrix} 0.2000 \\ 0.3000 \end{matrix}]$
(b)	$[\begin{matrix} 0.2000 \\ 0.3000 \end{matrix}]$
(c)	$[\begin{matrix} 0.2967 \\ 0.3567 \end{matrix}]$
(d)	$[\begin{matrix} 0.1111 \\ 0.3288 \end{matrix}]$

14.

Power system having N number of buses, the state variable ‘x’ may be defined as _______number of buses voltage angle and __________number of bus voltage magnitude

(a)	N-2,N-1
(b)	N-1,N
(c)	N,N
(d)	N,N-1

15.

Redundancy of state estimation is

(a)	0.5 to 1
(b)	1 to 2
(c)	1.5 to 2.8
(d)	More than 3

16.

The problem of state estimation is

(a)	Linear
(b)	Non-linear
(c)	Algebraic
(d)	Not define properly

17.

State estimation of power system is solved using

(a)	Batch processing
(b)	Sequential processing
(c)	Both a and b
(d)	None of above

18.

Power system state estimation non linear equation

∆ Z = H ∆ X + r

∆ Z

contains

(a)	All the bus and line active and reactive power change
(b)	All the bus voltage magnitude change
(c)	All the bus voltage angle change
(d)	All of above

19.

Power system state estimation non linear equation

∆ Z = H ∆ X + r

∆ X

contains

(a)	All the bus active and reactive power change
(b)	All the line active and reactive power change
(c)	All the bus voltage magnitude and angle change
(d)	All the bus voltage magnitude and angle change estimated

20.

Which of the following case is consider for state estimation for power system

(a)	Only active and reactive power injection
(b)	Only active and reactive line flow
(c)	Either a or b
(d)	Both a and b

Showing 11 to 20 out of 44 Questions