GATE Power Systems: Per-unit quantities, Bus admittance matrix, Gauss-Seidel and Newton-Raphson load flow methods – Previous Year Questions
16 GATE previous year questions on Per-unit quantities, Bus admittance matrix, Gauss-Seidel and Newton-Raphson load flow methods (Power Systems, Electrical Engineering) with answers and explanations, from every paper.
- GATE 2017 EE Q20 – A 3-bus power system is shown in the figure below, where the diagonal elements of Y-bus matrix are: Y 11 = -j12 pu, Y 22 = -j15 pu and Y 33 = -j7 pu.…
- GATE 2017 EE Q31 – A 10-bus power system consists of four generator buses indexed as G1, G2, G3, G4 and six load buses indexed as L1, L2, L3, L4, L5, L6. The…
- GATE 2017 EE Q50 – The bus admittance matrix for a power system network is bmatrix -j39.9 & j20 & j20 \\ j20 & -j39.9 & j20 \\ j20 & j20 & -j39.9 bmatrix pu. There is a…
- GATE 2015 EE Q52 – Determine the correctness or otherwise of the following Assertion [a] and the Reason [r]. Assertion: Fast decoupled load flow method gives approximate…
- GATE 2016 EE Q29 – In a 100 bus power system, there are 10 generators. In a particular iteration of Newton Raphson load flow technique (in polar coordinates), two of the…
- GATE 2018 EE Q32 – A 10001000 bus admittance matrix for an electric power system has 8000 non-zero elements. The minimum number of branches (transmission lines and…
- GATE 2018 EE Q39 – Consider the two bus power system network with given loads as shown in the figure. All the values shown in the figure are in per unit. The reactive…
- GATE 2019 EE Q31 – The Y bus matrix of a two-bus power system having two identical parallel lines connected between them in pu is given as Y…
- GATE 2020 EE Q19 – Out of the following options, the most relevant information needed to specify the real power (P) at the PV buses in a load flow analysis is
- GATE 2020 EE Q39 – Two buses, i and j, are connected with a transmission line of admittance Y, at the two ends of which there are ideal transformers with turns ratios as…
- GATE 2021 EE Q19 – Consider a power system consisting of N number of buses. Buses in this power system are categorized into slack bus, PV buses and PQ buses for load…
- GATE 2021 EE Q45 – A 3-Bus network is shown. Consider generators as ideal voltage sources. If rows 1, 2 and 3 of the Y Bus matrix correspond to Bus 1, 2 and 3,…
- GATE 2023 EE Q28 – The bus admittance (Y bus) matrix of a 3-bus power system is given below. Y bus=bmatrix-j15&j10&j5\10&-j13.5&j4\5&j4&-j8bmatrix Considering that there…
- GATE 2023 EE Q41 – The three-bus power system shown in the figure has one alternator connected to bus 2 which supplies 200 MW and 40 MVAr power. Bus 3 is infinite bus…
- GATE 2026 EE Q18 – Consider a power system with N buses, of which P are generator buses and the remaining Q are load buses (where there is no generation). Assume that…
- GATE 2026 EE Q41 – A three-phase two-winding transformer has a voltage transformation ratio V PV S=0.866+j0.5, where V P is the primary side voltage in p.u., and V S is…