Wind power integration into the automatic generation control of power systems with large-scale wind power

Transmission system operators have an increased interest in the active participation of wind power plants (WPP) in the power balance control of power systems with large wind power penetration. The emphasis in this study is on the integration of WPPs into the automatic generation control (AGC) of the power system. The present paper proposes a coordinated control strategy for the AGC between combined heat and power plants (CHPs) and WPPs to enhance the security and the reliability of a power system operation in the case of a large wind power penetration. The proposed strategy, described and exemplified for the future Danish power system, takes the hour-ahead regulating power plan for generation and power exchange with neighbouring power systems into account. The performance of the proposed strategy for coordinated secondary control is assessed and discussed by means of simulations for different possible future scenarios, when wind power production in the power system is high and conventional production from CHPs is at a minimum level. The investigation results of the proposed control strategy have shown that the WPPs can actively help the AGC, and reduce the real-time power imbalance in the power system, by down regulating their production when CHPs are unable to provide the required response

Quasi-SoC Balancing Control for Networked Ad-hoc Microgrids Against Natural Disasters

After natural disasters, mobile containerized renewable energy-based Ad-hoc microgrids could be an emergency solution to maintain power supply to critical loads. In this paper, a novel two-layer coordinated control for individual and networked Ad-hoc microgrids is proposed. The first layer deals with the internal coordination between RE and ESS to maintain a stable operation within an Ad-hoc microgrid by using bus frequency, thereby without communication links to reduce power consumption. When forming the networked Ad-hoc microgrids to a critical load with higher load demand, the regulations on the bus frequency from each Ad-hoc microgrid will result in instability. Therefore, a quasi-SoC balancing control strategy for the networked Ad-hoc microgrids is further proposed with only binary information exchanges to mitigate the interactions caused by the internal coordination control among the Ad-hoc microgrids. To verify the effectiveness of the proposed control approach, simulation results with Matlab/Simulink are presented.</p