Voltage Regulation Strategy for Active Distribution Network Based on OLTC and Inverter
2019
The Accessing of distributed generation (DG) has changed the radiative structure of the distribution network, and makes the automatic tap control of the on-load tap changer (OLTC) no longer applicable. In this paper, a voltage regulation strategy for active distribution network based on OLTC and inverter is proposed. In this strategy, the influence of action of the OLTC tap on voltage is analyzed and then, the optimal tap control (OTC) is adopted in OLTC control, and the bus voltage which deviates from the rated voltage is taken as the control target to control the network voltage. Linearize the objective function and improve the solving speed. The local control is to use inverter to absorb reactive power to counteract the influence of DG. Finally, the proposed control strategy is simulated through IEEE33 system, and analysis the results. The results show that the control strategy proposed in this paper is effective.
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