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User three-phase imbalance adjustment method based on greedy strategy

A balance adjustment, three-phase technology, applied in the direction of reducing the asymmetry of polyphase networks, eliminating/reducing asymmetry in polyphase networks, etc., can solve problems such as three-phase unbalance

Active Publication Date: 2016-07-13
JILIN PROVINCE ELECTRIC POWER RES INST OF JILIN ELECTRIC POWER CO LTD +3
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Problems solved by technology

[0008] The present invention provides a user three-phase unbalance adjustment method based on a greedy strategy to solve the three-phase unbalance problem in the actual power grid, and form a new load balance adjustment method based on the long-term cumulative value based on the greedy strategy , redistribute the charge value of the distribution network, which can effectively deal with the three-phase unbalance problem in the actual power grid, and provide a beneficial guarantee for improving the power quality of the distribution network distribution network

Method used

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  • User three-phase imbalance adjustment method based on greedy strategy
  • User three-phase imbalance adjustment method based on greedy strategy
  • User three-phase imbalance adjustment method based on greedy strategy

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Embodiment Construction

[0068] Include the following steps:

[0069] (1) According to the actual power grid structure, use the carrier communication of the smart energy meter to obtain the A, B, and C three-phase user power data.

[0070] (2) Based on the generalized definition of three-phase unbalance of charge accumulation, a user adjustment target model is proposed;

[0071] (3) According to the greedy strategy, the optimal adjustment plan is obtained;

[0072] (4) Using iterative solution to obtain the three-phase power distribution results.

[0073] Electric quantity data description in the step (1) of the present invention:

[0074] There are L users in phase A, and the power data of users in phase A is W(A 1 ),W(A 2 )…W(A L ); There are M users in phase B, and the user power data of phase B is W(B 1 ),W(B 2 )…W(B M ); There are N users in phase C, and the user power data of phase C is W(C 1 ),W(C 2 )…W(C N );

[0075] The generalized definition of three-phase unbalance of step (2) ...

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Abstract

The invention relates to a user three-phase imbalance adjustment method based on a greedy strategy and belongs to the field of automatic control of electrical power systems.Measured data are measured through an intelligent electric meter, an electricity utilization and acquisition system is connected by utilizing carrier communication to obtain measured power grid data, a generalized three-phase imbalance definition based on electric charge accumulation is provided, four-wire three-phase electric quantity users and single-phase electric quantity users are distinguished, an optimized user adjustment model is provided according to the greedy strategy, and an adjustment scheme is determined according to different target values.The user three-phase imbalance adjustment method has the advantages that the stability and real-timeliness of a system are high, the method can be used for an actual electrical power system area, utilizes an intelligent means to automatically optimize the adjustment scheme, is simple and practical, can effectively reduce the loss of a power grid and improves electric energy quality.

Description

technical field [0001] The invention belongs to the field of automatic control of electric power systems, and in particular relates to a user three-phase unbalance adjustment method based on a greedy strategy. Background technique [0002] There are many power users in our country, and they are scattered widely. Three-phase four-wire distribution network and two-wire distribution network exist at the same time. figure 1 As shown, the three-phase load unbalance problem is caused. The three-phase unbalance has many harms to industrial and agricultural production, which causes the increase of invalid line loss and reduces the quality of electric energy. This type of distribution transformer has a large power supply area, long transmission lines, scattered loads, and the coexistence of three-phase loads and single-phase loads. If the load distribution of each phase is uneven, the distribution transformer must have unbalanced three-phase loads during operation. This is an impor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/26
CPCY02E40/50H02J3/26
Inventor 秦绪华高长征唐伟宁刘座铭于洋于海洋
Owner JILIN PROVINCE ELECTRIC POWER RES INST OF JILIN ELECTRIC POWER CO LTD
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