These disadvantages could be eliminated in three-phase systems if the energy account based on the integral of the active power of the positive sequencecomponent with the fundamental harmonic.
在三相系统中，以正序基波功率的积分作为计量标准，同样可以消除这两方面的不利影响。
2
The healthy line is unloaded for zero-sequencecomponent when a single-phase fault occurs in a non-solid earthed network.