A transmission network congestion control method based on partition reconstruction of high-voltage distribution network

Abstract

The invention discloses a transmission network congestion control method based on partition reconstruction of a high-voltage distribution network, which includes the following steps: S1, collecting information on the urban high-voltage distribution network and transmission network, and numbering the AC nodes; S2, constructing an upper-level transmission network network congestion control optimization model, and obtain the optimal transfer capacity of the high-voltage distribution network in each region based on it; It obtains the optimal topology state of the high-voltage distribution network in each region; S4. Calculates the active load of the AC nodes in the transmission network according to the optimal topology state of the high-voltage distribution network in each region; S5. Determines whether the transmission network is still in a blocked state, and if so, then Return to step S2, otherwise end the method; the present invention solves the problem that it is difficult to find an effective decision-making solution in the high-dimensional decision-making space in the traditional decision-making method in the prior art, which leads to the threat to the safe operation of the urban power grid.

Description

technical field [0001] The invention belongs to the technical field of power system automation, and in particular relates to a transmission network congestion control method based on high-voltage distribution network partition reconstruction. Background technique [0002] In today's society, electric energy has become an indispensable part of modern life. Many developing countries have invested a lot of manpower and material resources in the power industry to improve their living standards. In my country, the 220kV transmission network has gradually penetrated into the urban load center and has begun to take shape, forming the backbone grid of the urban power grid, which is powered by the 500kV substation on the periphery of the city, and the proportion of external electricity occupies a large scale. In addition, its downstream network 110kV high-voltage distribution network is responsible for connecting the transmission network and the medium-voltage distribution network, ...

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Problems solved by technology

[0003] The high-voltage distribution network has its own distinctive characteristics in terms of network topology, electrical characteristics, and component equipment: on the one hand, the urban high-voltage distribution network has a large number of electrical components similar to the transmission network, such as large-capacity transformers and long-distance transmission wires; On the one hand, the structure of the high-voltage distribution network is radial, but compared with the medium-voltage distribution network, the load is more concentrated and the backbone topology is clearer, but it is limited by the power node (220kV substation), the switching of 110kV main supply and backup lines, and the Structural adjustments within the substation and multiple backup paths between substations lead to extremely diverse combined control schemes when the operation mode is adjusted (such as load transfer)

[0004] In the face of the adjustment of the operation mode of the urban power grid with an increasing scale, the traditional decision-making method relying on human experience is difficult to find an effective decision-making solution in the high-dimensional decision space, and even threatens the safe operation of the urban power grid.

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