A method of locating a fault in a power transmission scheme, the power transmission scheme including a plurality of power transmission sections and a plurality of connection points (J 0 -J 5), the plurality of connection points including a first end connection point (J 0), a second end connection point (J 5) and at least one intermediate connection point (J 1 -J 4) connected between the first and second end connection points (J 0, J 5), each of the plurality of power transmission sections arranged to interconnect a respective two of the plurality of connection points (J 0 -J 5) such that the plurality of power transmission sections are connected successively between the first and second end connection points (J 0, J 5) and such that the intermediate connection point (J 1 -J 4) interconnects a respective neighbouring pair of the power transmission sections, the method comprising the steps of: (i) measuring first and second end voltage phasors at the first and second end connection points (J 0, J 5) respectively; (ii) obtaining a first set of voltage phasors, wherein the first set of voltage phasors includes the measured first end voltage phasor and further includes respective voltage phasors at each of the second and intermediate connection points that are determined based on the measured first end voltage phasor; (iii) obtaining a second set of voltage phasors, wherein the second set of voltage phasors includes the measured second end voltage phasor and further includes respective voltage phasors at each of the first and intermediate connection points that are determined based on the measured second end voltage phasor; (iv) comparing the first and second sets of voltage phasors to identify the power transmission section or connection point corresponding to the location of the fault, wherein each voltage phasor of the first set of voltage phasors is compared to the respective voltage phasor of the second set of voltage phasors that corresponds to the same connection point, characterised by: obtaining a subtraction voltage phasor of each connection point, wherein the subtraction voltage phasor of each connection point is equal to the difference between the corresponding voltage phasors of the first and second sets of voltage phasors; determining the minimum amplitude value of the plurality of subtraction voltage phasors; comparing the minimum amplitude value with a predefined criterion threshold to identify the power transmission section or connection point corresponding to the location of the fault. (i) measuring first and second end voltage phasors at the first and second end connection points (J 0, J 5) respectively; (ii) obtaining a first set of voltage phasors, wherein the first set of voltage phasors includes the measured first end voltage phasor and further includes respective voltage phasors at each of the second and intermediate connection points that are determined based on the measured first end voltage phasor; (iii) obtaining a second set of voltage phasors, wherein the second set of voltage phasors includes the measured second end voltage phasor and further includes respective voltage phasors at each of the first and intermediate connection points that are determined based on the measured second end voltage phasor; (iv) comparing the first and second sets of voltage phasors to identify the power transmission section or connection point corresponding to the location of the fault, wherein each voltage phasor of the first set of voltage phasors is compared to the respective voltage phasor of the second set of voltage phasors that corresponds to the same connection point, characterised by: obtaining a subtraction voltage phasor of each connection point, wherein the subtraction voltage phasor of each connection point is equal to the difference between the corresponding voltage phasors of the first and second sets of voltage phasors; determining the minimum amplitude value of the plurality of subtraction voltage phasors; comparing the minimum amplitude value with a predefined criterion threshold to identify the power transmission section or connection point corresponding to the location of the fault. obtaining a subtraction voltage phasor of each connection point, wherein the subtraction voltage phasor of each connection point is equal to the difference between the corresponding voltage phasors of the first and second sets of voltage phasors; determining the minimum amplitude value of the plurality of subtraction voltage phasors; comparing the minimum amplitude value with a predefined criterion threshold to identify the power transmission section or connection point corresponding to the location of the fault.