Frequency control reserve with multiple micro grid participation for power system frequency stability

Abstract

The introduction of this micro grids into the conventional distribution network system forces a new challenge to the system operation. The failure factor of the power system performance essentially due to the limitation of electrical power generation in which could not meet the load demand. In order to maintain the frequency stability of the system, the power sources must be matched instantaneously among all generators and constantly supply to the load demand. A deviation of system frequency from the set-point value will affect the entire stability of power system network. This paper investigates the impact of utilizing multiple micro grids in supporting and facilitating on grid’s frequency. A method called Frequency Control Reserve (FCR) is introduced, with intention to share the excessive power from all available micro grids. These power will be controlled effectively before being injected into the main grid to stabilize the power frequency. Simulation using MATLAB Simulink have been used to simulate the result and shows great potential to be integrated with distributed generation i.e. solar photovoltaic (PV) for Malaysia power system vicinity.

Voltage and frequency stabilization by fuzzy integrated droop control of a multi renewable source micro grid

“…This fuel cell is an optional source as the power generation can be controlled and can be activated during demand. The fourth source is otherwise called as energy storage module which comprise of battery pack [8]. This battery pack can store power from excess generation by the photovoltaic and wind farm modules.…”

“…𝑉 𝑞 * = 𝑈𝑞 + 𝑉𝑞 − 𝐿𝜔𝐼 𝑑 (8) the above reference d-q components are converted back to abc sinusoidal reference signals using inverse park's transformation as given.…”

Simulation of adaptive gain control via 2-D lookup table for isolated hybrid micro-grid system

“…Where x=1, 2, 3 refers to DGs design, 𝜃 𝑥𝑝 is the phase angle difference between output voltage 𝑉 𝑥 and PCC voltage 𝑉 𝑝 . In the event that line inductor is larger than the resistor, the aforementioned power flow can be simplified to the by ones (8) and (9).…”

“…The conventional proportional integral (PI) control techniques for micro-grid utilize the timeconsuming try and error methods to calculate the control gains. However, in the event of sudden loads change, frequency deviation occurs and performance can be disappointing [9]. To avoid this problem, the intelligent control scheme uses soft computing technologies such as fuzzy logic control (FLC).…”