A low-voltage distribution network power load balancing method and device thereof
A low-voltage distribution network and power load technology, applied in the field of low-voltage distribution network load balancing, low-voltage distribution network power load balancing, and low-voltage distribution network power load balancing devices, can solve commutation vibration, load characteristics are not considered, Power supply phase mutation and other problems, to avoid commutation vibration, conducive to the effect of stable operation
Active Publication Date: 2019-08-23
智拓环保节能科技(山东)有限公司
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Problems solved by technology
The technical solution disclosed in the above patent application does not consider the load characteristics of the load device it supplies when selecting the commutation device. For example, if the load device has a motor with magnetic moving parts built in, when the phases are switched, the phase of the power supply changes suddenly, resulting in the occurrence of magnetic moving parts. Commutation vibration, noise, load device can not run stably
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[0033] In order to clarify the technical scheme and technical purpose of the present invention, the present invention will be further introduced below in conjunction with the accompanying drawings and specific implementation methods.
[0034] Power wiring of main and branch lines of low-voltage distribution network
[0035] The low-voltage output side of the low-voltage transformer adopts a three-phase four-wire system, and is wired to residential areas to provide electric energy to residential users. The low-voltage output side can be understood as a distribution network and a low-voltage distribution network, which are collectively referred to as low-voltage distribution networks hereinafter. The low-voltage distribution network, such as Figure 4As shown, it includes a main line drawn from the low-voltage side of the low-voltage transformer and m branch lines, which are respectively branch line 1, branch line 2, ..., branch line m. The branch lines 1, 2, ..., branch lines...
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The invention discloses an electrical load balancing method and device for a low-voltage power distribution network. The method comprises the steps that the electrical load of a main line is unbalanced, phase adjustment and a corresponding adjustment amount value of the main line are determined; adjustment branch lines are selected from branch lines of which the total phase power loads of phase adjustment pair source phases are high, phase commutation devices, not supplying power to load devices with built-in magnetic movement parts, on adjustment branch line source phases are identified, and the needed phase commutation devices are selected from the identified phase commutation devices and then selected from the phase commutation devices which are not identified if the identified phase commutation devices are not enough; and the power load of the phase commutation devices selected from the adjustment branch lines is made to be equivalent to the adjustment amount value of the main line, a connection phase of the selected phase commutation devices on the branch lines is switched to a target phase, and then the electrical load of the main line and the electrical load of the branch lines meet the balance requirement. The conditions that the load devices with the built-in magnetic movement parts of a user side generate phase commutation vibration and noise can be reduced and avoided, and the load devices can keep operating stably.
Description
technical field [0001] The present invention relates to low-voltage distribution network load balancing technology, in particular to a low-voltage distribution network power load balancing method, and a low-voltage distribution network power load balancing device suitable for realizing the load balancing method. The invention belongs to low-voltage distribution network The field of power distribution technology. Background technique [0002] The load of the low-voltage distribution network is generally composed of a mixture of three-phase loads and single-phase loads. Residential electricity is all single-phase loads, and the distribution network is relatively complicated. The size is different and the power consumption time is different. Therefore, the three-phase unbalanced condition of the distribution network is irregular and unpredictable in advance, which leads to the long-term unbalanced three-phase load of the distribution network. The Chinese patent application wit...
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IPC IPC(8): H02J3/26
Inventor 陈鸽
Owner 智拓环保节能科技(山东)有限公司
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