FIELD: electrical engineering.
SUBSTANCE: invention relates to electrical engineering, in particular to power supply systems, and can be used in transformer substations to switch on power transformer under load. Semiconductor converter used is a three-phase bridge diode rectifier, the direct current circuit of which includes a reactor, and the three-phase contactor is configured as a three-phase short circuiter, note here that AC terminals of three-phase bridge diode rectifier and clamps of mechanical contacts of three-phase short circuiter are combined and connected to star of primary winding of power transformer. Application of proposed device allows to reduce inrush current by approximately 2 times. This in turn, in proportion to current square, reduces by 4 times electrodynamic forces acting on windings of power transformer, and start-up losses in power transmission line. Proposed device is used in industrial power supply networks. Greatest effect can be expected for open-type transformer substations. This electronic electrical device is the most simple and reliable due to the fact that it does not have a microelectronic control system. It can replace known electronic-electrical devices for switching on of power transformers.
EFFECT: technical result consists in simplification of device design, its operation and repair, improvement of reliability of starting device and power supply system as a whole.
1 cl, 2 dwg
Title | Year | Author | Number |
---|---|---|---|
CAPACITORS TO THE THREE-PHASE NETWORK CONNECTION DEVICE | 2017 |
|
RU2665476C1 |
AC/DC CONVERTER | 2023 |
|
RU2814466C1 |
DEVICE FOR SWITCHING ON, SWITCHING OFF AND ADJUSTING VOLTAGE OF TRANSFORMER SUBSTATION | 2017 |
|
RU2667481C1 |
INDEPENDENT ELECTRIC SUPPLY SYSTEM | 2016 |
|
RU2681839C1 |
METHOD FOR DISTRIBUTION, SUMMATION, AND ADJUSTMENT OF POWER OF ELECTRICAL ENERGY FLOWS DURING TRANSFORMATION OF THREE-PHASE VOLTAGE INTO CONSTANT | 2021 |
|
RU2784926C2 |
DEVICE FOR DETERMINING PHASE-TO-PHASE AND GROUND FAULTS IN NETWORKS WITH AN ISOLATED VOLTAGE OF 6-10 kV NEUTRAL | 2022 |
|
RU2788035C1 |
AC VOLTAGE CONVERTER | 2011 |
|
RU2475922C1 |
OFFSETTING ELECTRICAL POWER SUPPLY SYSTEM FOR THE ELECTRIC ENERGY REMOTE CONSUMERS | 2016 |
|
RU2626009C1 |
THREE-PHASE VOLTAGE REGULATOR WITH SINGLE- PHASE HIGH-FREQUENCY SECTION | 1996 |
|
RU2138112C1 |
VARIABLE VOLTAGE CONVERTER IN CONSTANT (VARIANTS) | 2017 |
|
RU2661890C1 |
Authors
Dates
2020-02-26—Published
2019-10-30—Filed