A Three-phase Load Balance Control Strategy Based on Real-time Measurement of User Load
A technology of real-time measurement and load balancing, applied in the direction of multi-phase network asymmetry reduction, multi-phase network elimination/reduction of asymmetry, etc., can solve the problems of large manpower and material resources, poor economic benefits, manual switching, etc., to improve electric energy quality, reduce line loss, and create economic benefits
Active Publication Date: 2019-05-21
JIANGSU ELECTRIC POWER CO +1
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Problems solved by technology
[0005] However, installing a reactive power compensation device can only ensure the current balance at the outlet side of the transformer, and cannot actually solve the problem of "low voltage" at the end of the distribution network line, nor can it effectively reduce the line loss of the distribution network;
[0006] Manual commutation of users can only solve the above problems to a certain extent, but due to the dynamic nature of the distribution network load, it is necessary to manually commutate the user's load frequently, which requires a lot of manpower and material resources, and the economic benefit is poor
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[0055] The present invention as Figure 1-4 shown, including the following steps:
[0056] 1) Establish the load node model of the distribution station area; firstly, divide the entire load into two parts, the first part is 90% of users who are far away from the transformer, and the second part is the remaining 10% users who are closer to the transformer user;
[0057] According to the above method, the load is divided into two parts and distributed according to the distance from far to near, so that the whole area can be balanced across the board. Taking the last 10% of the users as a part is to prevent the unbalance degree of the entire distribution transformer area from meeting the set requirements after performing the following 2)-4) steps, so set aside 10% of the users for The situation is adjusted.
[0058] Partition numbering is carried out for users, and the partition numbering is based on the line distance between the distribution network node and the distribution ...
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A three-phase load balancing control method and a system. User loads in a power distribution station are divided into a first part and a second part. The first part is the user loads which are far away from the transformer in the power distribution station, and the second part is the user loads which are close to the transformer. Commutations are performed on the phases of the currents in the user loads so as to achieve three-phase load balance.
Description
technical field [0001] The invention relates to the field of power distribution technology, in particular to a three-phase load balancing control strategy and an intelligent commutation system based on real-time measurement of user loads. Background technique [0002] In the low-voltage distribution network system, there are a large number of single-phase, asymmetrical, nonlinear, and impact loads. Due to the poor design and planning of the early power grid, a large number of single-phase loads will be concentrated in one or two phases. Balanced load will cause three-phase unbalance in the power distribution system, resulting in unbalanced three-phase voltage and current in the power supply system. [0003] The unbalanced three-phase load of low-voltage distribution network is a long-term objective problem. my country's low-voltage distribution network usually adopts a three-phase four-wire power supply mode, and most users are single-phase loads or single-phase and three-p...
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IPC IPC(8): H02J3/26
CPCH02J3/26Y02E40/50
Inventor 陆惠斌车凯徐勇刘恒门高晓宁曹磊王宝安
Owner JIANGSU ELECTRIC POWER CO