چکیده:
This paper proposes a new intelligent droop control for controlling the voltage and frequency of microgrids (MGs). This intelligent method uses ANFIS controllers in order to decouple the system operation from the network specifications (such as line impedances). The proposed framework can be utilized in order to control the MGs including various DG technologies and conventional generators. Also, the PHEVs are modeled and participated in the voltage and frequency control. The PHEVs participate in the primary voltage and frequency control. Simulation studies have been implemented on a 14-bus MG including renewable and non-renewable units. Simulation results approve the effectiveness and applicability of the proposed methodology in control of MG’s voltage and frequency.
خلاصه ماشینی:
Eventually, in the [25] a new power electronic based study of this problem is introduced which contribute the PHEVs in the primary voltage and frequency control.
Traditional droop control The basic idea behind the droop strategy is that, several generating units in a power system should have different voltage and frequency set points, in order to operate stable [17].
رجوع شود به تصویر صفحه Fig. 3- Proposed control block diagram of an inverter based DG in the MG رجوع شود به تصویر صفحه Fig. 4- Proposed Model for PHEV in MG [20] Considering intermittent nature of RES, storage devices should be available in order to relieve voltage and frequency deviations.
4. Simulation and results In order to implement both proposed strategies of voltage and frequency control and PHEVs participation, simulation studies are presented.
5, the Schematic diagram of this MG is illustrated in Fig. 5, that consists of DGs and loads and parking lot of PHEVs. رجوع شود به تصویر صفحه Fig. 5- 14-bus test MG implemented in simulation studies [10] All of DGs are controlled by an intelligent droop control introduced earlier, and the diesel generator has conventional governor and AVR systems.
Conclusions In this paper, a new intelligent droop control for inverter based DG units in the MG has been proposed that can be used for primary voltage and frequency control.
Based on the contract between vehicle’s owner and the system operator, PHEVs participate in controlling the voltage and frequency by fast injection of active power.