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Coordinated Control Strategy of Distributed Network Voltage Considering Operation State

The voltage problem caused by a large number of distributed generations connected to distribution network is attracting more and more attention. Aiming at the problem of voltage control in distribution network, this paper divides the operation state of distribution network into normal state, early warning state and emergency state. Under the principle of ensuring the voltage stability of distribution network firstly, and then making distributed generation with more generation as much as possible, the coordinated operation control strategy between distributed photovoltaic, small hydropower and energy storage under different operating states is proposed, and the effectiveness of the control strategy is verified by IEEE standard calculation example. The proposed method has important application value to ensure the reliable and stable operation of distribution network and distributed generation.