A user-friendly tool for allocation of emission limits considering frequency-dependent impedance

Distribution system operators need simple tools for calculating the impact on voltage quality from new loads and renewable generation. This paper presents the further development and verification of a tool for allocating electrical emission quotas based on the standards IEC 61000-3-6, IEC 61000-3-7, and IEC 61000-3-13. The main focus is a simple methodology for estimating the frequency-dependent impedance, which will improve the accuracy of the allocation. Thus, the tool allows for higher single harmonic current limits for most customers, which could reduce their installation costs.