Load modeling theory characterizes how the real and reactive power drawn by different classes of electrical loads (lighting, heating, induction-motor, and synchronous-motor loads) vary as functions of terminal voltage and system frequency, and how large numbers of heterogeneous individual loads are aggregated into composite models for power system analysis. It also introduces the polynomial/exponential voltage- and frequency-sensitivity formulation (ZIP-type coefficients) used to represent composite substation loads, along with companion topics in power flow analysis: formation of the bus admittance (Ybus) matrix and classification of network buses (slack, load/PQ, voltage-controlled/PV) for solving power flow equations. This belongs to power system analysis, within electrical power engineering, as a modeling foundation for steady-state (power flow) and transient stability studies.
Load modeling theory characterizes how the real and reactive power drawn by different classes of electrical loads (lighting, heating, induction-motor, and synchronous-motor loads) vary as functions o…