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Device and method for three-phase unbalance adjustment based on electricity utilization information acquisition system

A technology for collecting system and electricity consumption information, applied in information technology support system, AC network voltage adjustment, power network operating system integration, etc., can solve problems such as three-phase unbalance adjustment and three-phase unbalance, and reduce line loss efficiency, reducing power outage time, and improving the possibility of power supply

Pending Publication Date: 2019-03-22
CHUZHOU POWER SUPPLY CO OF STATE GRID ANHUI ELECTRIC POWER CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a device and method for three-phase unbalance adjustment based on a power consumption information collection system that can solve the existing three-phase unbalance adjustment problem

Method used

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  • Device and method for three-phase unbalance adjustment based on electricity utilization information acquisition system
  • Device and method for three-phase unbalance adjustment based on electricity utilization information acquisition system
  • Device and method for three-phase unbalance adjustment based on electricity utilization information acquisition system

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Embodiment 1

[0030] based on above Figure 1-4 The design principle and method: a device for adjusting the three-phase unbalance based on the electricity consumption information collection system in this embodiment includes several single-phase commutation devices 5, and the 6 branch lines L of each household meter and the power distribution A single-phase phase-changing device 5 is installed at the joint of the main line of the meter box 1; The acquisition system 4 forms a low-voltage three-phase unbalance adjustment system; each of the single-phase commutation devices 5 is used to be responsible for the adjustment of the A, B, and C three-phase power supplies of the 6 branch lines L of each household meter. The phase commutation device 5 includes a sampling circuit 51, a processing circuit 52, a communication circuit 53, a control circuit 54, and a control switch 55; the sampling circuit 51 communicates with the collector 2 and the concentrator 3 in the power distribution meter box 1 thr...

Embodiment 2

[0032] A device for adjusting three-phase unbalance based on the electricity consumption information collection system of this embodiment has basically the same structure as that of Embodiment 1, the main difference being that the control switch (55) is a three-way control switch K1, K2, K3, the incoming wire ends of the three-way control switches K1, K2, K3 are respectively connected to the lines A, B, and C in three phases; the outgoing wire ends of the control switches K1, K2, K3 are connected in parallel with the branch line L connected, the three-way control switches K1, K2, and K3 realize that only one control switch is closed at any time through a hardware interlock drive circuit, and the other two control switches are disconnected. The three-way control switches K1, K2, and K3 use Thyristor, magnetic latching relay or a combination of thyristor and magnetic latching relay; this embodiment ensures that only one control switch of each group of control switches is closed t...

Embodiment 3

[0034]A device for adjusting the three-phase unbalance based on the power consumption information collection system of this embodiment has the same structure as that of Embodiment 1, the main difference is that the processing circuit 52 of the single-phase commutation device 5 uses an algorithm And logical control realizes that the branch line L load works in phase modulation according to the instructions of the background power consumption information collection system 4. The adjustment in this embodiment is convenient and quick, and the number of adjustments can be increased with the change of the load, and the adjustment period can be shortened. The number of adjustments can be increased with the change of the load; Reduce the power outage time, reduce the power outage scope, increase the possibility of power supply; reduce the neutral wire current. Reduce the line loss rate in the distribution station area.

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Abstract

The invention discloses a device for three-phase unbalance adjustment based on an electricity utilization information acquisition system. The device comprises a plurality of single-phase commutation devices, wherein one of the single-phase commutation devices is installed at a joint of each household electric meter and branch circuit L and a trunk line of a distribution electric meter box; each single-phase commutation device forms a low-voltage three-phase unbalance adjustment system with an acquisition device installed in the distribution electric meter box, a centralizer and a background electricity utilization information acquisition system; each single-phase commutation device is responsible for the adjustment of A, B and C phases of power supplies of each household electric meter andbranch circuit L. The invention further discloses a method for three-phase unbalance adjustment based on the electricity utilization information acquisition system. The device and the method have theeffects of: accumulating electric quantity of each end user, acquiring historical data within a preset time period and preprocessing the historical data, adjusting a three-phase unbalance degree according to the preprocessed historical data, and adjusting a scheme thereof; and the data is reliable, the analysis and calculation method is mature, and the three-phase unbalance degree of the tail endcan be effectively controlled.

Description

technical field [0001] The invention relates to the problem of three-phase unbalance adjustment in a low-voltage distribution network, in particular to a device and method for three-phase unbalance adjustment based on an electricity consumption information collection system. Background technique [0002] Due to the existence of a large number of single-phase loads in the low-voltage station area, it is difficult to maintain the balance of the three-phase load, especially as the power consumption increases, the three-phase unbalanced contradiction in the low-voltage station area becomes increasingly prominent. The three-phase imbalance will increase the power loss of the line and the power loss of the distribution transformer; reduce the output of the transformer and shorten the life of the distribution transformer; it will also cause local low voltage; it will also reduce the output and service life of the induction motor. [0003] For the three-phase unbalance adjustment, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/26H02J3/14
CPCH02J3/14H02J3/26Y04S20/222Y04S20/242Y02E40/50Y02B70/30Y02B70/3225
Inventor 余伟郭其锋郑新张健林琳赵艳兵王义军高杨霞李登峰鲁杰王睿马治国徐珊珊曹来军陈有为潘翊
Owner CHUZHOU POWER SUPPLY CO OF STATE GRID ANHUI ELECTRIC POWER CORP
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