Estimating B-coefficients of power loss formula considering volatile power injections: an enhanced least square approach

Estimating B-coefficients of power loss formula considering volatile power injections: an enhanced least square approach

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In power system analysis and optimisation, the B-coefficient loss formula is frequently used to estimate network losses. However, given the rapidly increasing penetration of renewable generations and responsive demands, nodal power injections of modern power systems appear to be highly variable, deteriorating the accuracy of the traditional B-coefficients loss formula. To address this issue, several typical variants of direct current power flow approximations combining with two different least square methods are streamlined in a unified framework, spawning several improved least square-based methods to estimate B-coefficients in network loss formula. The improved methods relax the restrictive assumption in existing literature that bus load is linearly dependent on system load, and account for load distribution variability, hence remarkably enhance the accuracy of B-coefficients estimation with highly volatile nodal power injections. Case studies performed on IEEE-39 and RTS-96 bus systems demonstrate that the enhanced methods outperform traditional ones.


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