Method and device for setting operational constraint of distribution network containing distributed power source

Abstract

The invention discloses a method and a device for setting an operational constraint of a distribution network containing a distributed power source. The method comprises steps of: obtaining the numberof nodes of at least one distribution network provided with distributed power sources, acquiring the rated capacity of the distributed power sources in one-to-one correspondence with the nodes of theat least one distribution network provided with the distributed power sources, acquiring the active load corresponding to the planning level year, obtaining the upper limit of the ratio of the totalpower of the distributed power sources to the active load, and according to the number of nodes of the distribution network installed with distributed power sources, the rated capacity, the active load, and the upper limit of the ratio, establishing a constraint formula for the distributed power source permeability. The method and the device solve the technical problem that the planning method based on nominal output makes the operation of the distributed power sources good under some conditions but makes the operation of the distributed power sources deteriorated under other conditions, leading to the need to propose a method for setting the operational constraint that the distribution network meets under various operational conditions after the distributed power sources are jointed.

Description

Technical field [0001] The invention relates to the field of distribution network planning, in particular to a method and device for setting operating constraints of a distribution network containing distributed power sources. Background technique [0002] As an alternative to increasing the capacity of the distribution network, distributed power has attracted the attention of planners for its economic, flexible, environmentally friendly, and avoidable or delaying power grid construction. As an alternative to increasing the capacity of the distribution network, the existing planning schemes are mainly Considering the minimum network loss or the optimal cost under the maximum and minimum operating modes is the planning model. However, the power output of various new energy forms of distributed power sources connected to the distribution network is greatly affected by meteorological conditions, with frequent fluctuations and amplitudes. At the same time, considering that the distri...

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Problems solved by technology

[0004] The present invention provides a method and device for setting operation constraints of a distribution network with distributed power, which is used to solve the planning method according to the rated output in the prior art, so that the operation of distributed power is very effective under certain conditions , but it will play a deteriorating role under other operating conditions, which leads to the technical problem of needing to propose a method for setting the operating constraints that the distribution network after accessing the distributed power generation satisfies under various operating conditions

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