Distributed photovoltaic power supply site selection optimization method based on power distribution network probabilistic load flow calculation

Abstract

The invention discloses a distributed photovoltaic power supply site selection optimization method based on power distribution network probabilistic load flow calculation. The method comprises steps that a multi-objective optimization model considering the dynamic characteristics of a power distribution network is constructed, and an objective function and constraint conditions of a multi-objective optimization problem are formulated; a sequential fluctuation rule of load and photovoltaic output is analyzed, and dynamic multi-objective planning is converted into static multi-objective optimization in a probabilistic power flow mode; Latin hypercube sampling is carried out on actual historical operation data of the multi-time-space power distribution network containing the photovoltaic power supply, and a Monte Carlo simulation method is utilized to calculate probabilistic load flow; different access schemes are scored by adopting a probabilistic load flow calculation result, and a distributed photovoltaic power supply site selection optimization scheme considering the dynamic characteristics of a distribution network topology line is obtained in combination with a vector evaluation genetic algorithm. The method is advantaged in that in a typical scene of any switch state combination, reduction of voltage deviation, voltage fluctuation and network loss after access can be realized.

Description

technical field [0001] The invention relates to the technical field of photovoltaic planning, in particular to a distributed photovoltaic power source site selection optimization method based on distribution network probabilistic power flow calculation. Background technique [0002] With the rapid development of distributed generation technology, the problems caused by photovoltaic and other distributed generation (Distributed Generation, DG) connected to the distribution network cannot be ignored. On the one hand, due to the timing mismatch between photovoltaic power generation and load demand, the randomness of regional distribution network power flow increases, thereby reducing the voltage quality of distribution network and affecting the safety of power grid operation; on the other hand, distributed photovoltaic power generation Connecting to the power grid may increase the network loss of the distribution network and affect the economy of the power grid operation. At t...

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Problems solved by technology

On the one hand, due to the timing mismatch between photovoltaic power generation and load demand, the randomness of regional distribution network power flow increases, thereby reducing the voltage quality of distribution network and affecting the safety of power grid operation; on the other hand, distributed photovoltaic power generation Connecting to the power grid may increase the network loss of the distribution network and affect the economics of power grid operation

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