Synchronous vector information-based real-time control method for feeder load of power distribution network

Abstract

The invention relates to a distributed energy local absorption technology of a power distribution network, in particular to a synchronous vector information-based real-time control method for a feederload of the power distribution network. The synchronous vector information-based real-time control method comprises the following steps of 1, building a power distribution network feeder power control model of a reactor according to a coupling relation between a load power and a bus voltage in the power distribution network; 2, building a PMU measurement information-based load control model; and3, achieving feedback control of the power distribution network by arranging a dead region and calculating a gain coefficient. By the control method, the rapid regulation capability of the power distribution network can be effectively improved so as to handle photovoltaic power fluctuation with high proportion, and the photovoltaic absorption capability of the power distribution network is improved; and photovoltaic transient state is prevented by the PMU measurement information, control is performed in a control object by voltage-active power coupling characteristic, and start and stop control of the load is prevented.

Description

technical field [0001] The invention belongs to the technical field of distribution network distributed energy on-site consumption, and in particular relates to a method for real-time control of distribution network feeder loads based on synchronous vector information. Background technique [0002] The access of a high proportion of distributed photovoltaics can effectively improve the economic benefits of the distribution network, and at the same time greatly reduce carbon emissions, which has a significant environmental protection effect. With the substantial increase of photovoltaic capacity connected to the distribution network, the fluctuation of new energy output also puts forward new requirements for the adjustment flexibility of the distribution network. The output of photovoltaics is affected by environmental factors such as temperature and light intensity, and its output has strong randomness and volatility. Before a large number of photovoltaics are connected, th...

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Problems solved by technology

The rapid fluctuation of distributed photovoltaic output will lead to a large shift in the operating point of the distribution network, with strong uncertainty, which increases the risk of overloading the transformer

In order to ensure that the equipment is not overloaded, the power grid will reserve more margin for the equipment, and the equipment load rate is low

In addition, the rapid fluctuation of photovoltaic output will also cause the voltage of the distribution network to frequently cross the boundary

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