一种精准相控变压器合闸励磁涌流抑制装置
By using a precision phase-controlled transformer closing excitation inrush current suppression device, which combines a three-phase closing switch, a reactor, and a voltage transformer, the problem of no-load loss of photovoltaic power generation transformers at night is solved, thereby achieving inrush current suppression and improved energy utilization efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 艾绍贵
- Filing Date
- 2025-08-14
- Publication Date
- 2026-07-17
AI Technical Summary
Transformers used in photovoltaic power generation suffer from no-load losses during periods of low sunlight (such as at night). Existing technologies cannot effectively suppress inrush currents during closing, leading to energy waste and equipment wear.
A precision phase-controlled transformer closing excitation inrush current suppression device is adopted. Through the combination of three-phase closing switches, reactors and voltage transformers, the controller controls the phase selection closing process of the switch to suppress the closing inrush current, and adjusts the switch state to reduce no-load loss when the light changes.
It effectively suppresses inrush current when the transformer is switched on, reduces no-load loss, improves the energy utilization efficiency of the equipment under changing lighting conditions, and simplifies the maintenance and replacement process of the reactor.
Smart Images
Figure CN224520652U_ABST
Abstract
Claims
1. A precise phase control transformer closing excitation inrush current suppression device, characterized in that: Including a three-phase closing switch and a reactor (2); The three-phase closing switch is composed of three separate phase closing switches, and multiple separate phase closing switches are connected in series in the multi-phase transmission line connecting the substation busbar and the transformer. The reactor (2) is connected in series between one of the phase-closing switches and the transformer.
2. The apparatus of claim 1, wherein: The device also includes a single-phase closing switch, which is connected in parallel to the reactor (2).
3. The apparatus of claim 2, wherein: The device also includes a voltage transformer TV, which is installed on the multi-phase transmission line connecting the substation busbar and the transformer.
4. The apparatus of claim 3, wherein: A pre-circuit breaker is also connected in series between the substation busbar and the three-phase closing switch.
5. The apparatus of claim 4, wherein: The device includes an outer casing (1); The voltage transformer TV is installed on the housing (1), and the three-phase output terminal of the pre-circuit breaker is connected to multiple terminals of the high-voltage terminal of the voltage transformer TV via a power transmission line. Both the single-phase closing switch and the three-phase closing switch are installed on the housing (1), and the terminals of the high-voltage end of the voltage transformer TV are connected to the terminals of the multiple phase-by-phase closing switches in the three-phase closing switch via copper busbars (3); the terminals of the single-phase closing switch are connected to the terminals of the corresponding phase-by-phase closing switches, and the single-phase closing switch and the reactor (2) are connected via copper busbars (3).