Power three-phase imbalance adjusting method and system, and medium
A technology of balance adjustment and phase adjustment, applied in the field of distribution network system, can solve problems such as unbalanced three-phase current at distribution network terminals, improve power supply quality and reliability, suppress single-phase overcurrent, and reduce transformer loss Effect
Pending Publication Date: 2021-11-12
深圳市国立智能电力科技有限公司
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[0004] The main purpose of the present invention is to provide a method, system and medium for adjusting power three-phase unbalance, which can effectively solve the problem of unbalanced three-phase current at distribution network terminals, and reduce transformer loss and line loss caused by unbalanced three-phase loads , suppress single-phase overcurrent and terminal low voltage conditions, and improve power supply quality and reliability
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[0047] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0048] The present invention considers that although the existing three-phase unbalance adjustment equipment on the market also has the function of automatically adjusting three-phase unbalanced loads, the blind and frequent switching of non-zero crossings brings a very large impact on the power system and user loads , The voltage fluctuation caused by frequent adjustment and switching brings great troubles to users, and even causes the protection tripping of the user end and the power supply bureau in severe cases, which brings great potential safety hazards to the safety of users' electricity use.
[0049] The GLDA-5100 commutation switch type three-phase unbalance automatic adjustment system proposed by the present invention is a set of products based on "zero-crossing commutation" and used to control the three-phas...
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The invention discloses a power three-phase imbalance adjusting method and system, and a medium. The method comprises the steps: monitoring the electric power three-phase imbalance information of a power distribution system through a host controller, dynamically formulating a load balance strategy according to the electric power three-phase imbalance information, and issuing a commutation adjustment command according to the load balance strategy; and enabling the phase-change switch to perform corresponding phase-change operation according to a phase-change adjustment command issued by the host controller so as to adjust the balance of the three-phase load current. According to the invention, the problem of unbalanced three-phase current of the distribution network terminal is thoroughly solved; traditional blind switching of three-phase imbalance is replaced, current zero-crossing removal and voltage zero-crossing input are realized, a zero angle is quickly captured, and non-impact switching and full-automatic three-phase imbalance adjustment are realized; and the comprehensive detection optimal strategy algorithm is utilized to quickly and automatically carry out the optimal switching strategy of three-phase imbalance at one time, transformer loss and line loss caused by three-phase load imbalance are reduced, the conditions of single-phase overcurrent and tail end low voltage are inhibited, and the power supply quality and the power supply reliability are improved.
Description
technical field [0001] The invention relates to the technical field of power distribution network systems, in particular to a method, system and medium for adjusting power three-phase unbalance. Background technique [0002] In the power low-voltage distribution network system, there are a large number of single-phase, asymmetrical, nonlinear, and impact loads. The three-phase load system changes randomly. These loads will cause three-phase unbalance in the power distribution system. Three-phase Unbalanced load will lead to unbalanced three-phase voltage and current in the power supply system, causing negative sequence voltage and negative sequence current in the power grid, affecting the quality of power supply, increasing line loss, and reducing power supply reliability. to adverse effects. [0003] Although the existing three-phase unbalance adjustment equipment on the market also has the function of automatically adjusting the three-phase unbalanced load, the blind and ...
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Login to View More IPC IPC(8): H02J3/26
CPCH02J3/26H02J2203/10Y02E40/50
Inventor 叶波谭斌徐鹏程罗三汉
Owner 深圳市国立智能电力科技有限公司