Emulation of Power System Load Dynamic Behavior Through Reconfigurable Analog Circuits

Abstract

Emulation of power system dynamic load behavior This paper presents the design of a circuit capable of is a viable alternative to popular simulation methods. In this emulating the dynamic behavior of power system loads. It is paper, a circuit designed to emulate the dynamic behavior of constructed from common analog components and is fully power system loads is presented. It is constructed from reconfigurable via a set of analog input signals. The common analog components and is fully reconfigurable via a reconfigurable analog load emulation module (RALEM) is set of analog input signals. As load behavior is heavily utilized in dynamic power flow studies. This method is dependent on that of the external network, it is important to unique as: demonstrate how this reconfigurable analog load emulation module (RALEM) may be utilized in dynamic power flow a Emultion, uik p simulao methdsaesur studies. Such a demonstration is presented. These studies any solution isphysicallyrealizable. provide the network's transient and steady-state flow of power * Emulation, unlike simulation, time is in real-time or faster. This is of importance as popular controllable and independent of the system size simulation methods cannot provide a solution with such speed. and complexity.

Reconfigurable Phase Shifting Transformer for Analog Computation

“…The load is modeled dynamically as a PQ bus interfacing with the DC emulation networks [7]. In this paper the phase shifting transformer model is lumped into the power system network and was developed to function in the framework of this DC emulation scheme.…”

“…In equilibrium this dynamic generator model provides steady state solutions to power flow. Prior research has developed static and dynamic generator models [4][5][6], dynamic load models [7] and static transmission line models [2,8] for the analog computation scheme utilized here.…”

Circuit model of a phase-shifting transformer for analog power flow emulation

“…In this paper an emulator load module that is based on a differential form of constant PQLoad model [10] is used. The loads are represented by frequency and voltage dependent models, i.e.,…”

Effect of Size on Analog Circuit Based Emulation of Steady-State Power System Behavior

“…A second sub-circuit utilizes those four measurements in conjunction with the internal real and imaginary bus voltages to calculate the instantaneous electric power flows. A third sub-circuit performs a comparison of the instantaneous power flows and steady-state power injections and, utilizing an OTA based integrator circuit, updates the bus internal voltage magnitude (1I ) and angle (() [11]. The updated internal bus voltage, in rectangular form, is fed back to the first and second sub-circuits [6].…”

“…Equation (13) gives the most fundamental definition of this value: the delay between realization of a solution and utilization of input. the real and imaginary voltage waveforms at a bus i to fall below a given threshold (Q9) [11]. When considering the computational speed of the emulation hardware, this value is of importance.…”