CN103138235A - Power transformer no-load automatic power-off device - Google Patents
Power transformer no-load automatic power-off device Download PDFInfo
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- CN103138235A CN103138235A CN 201110408136 CN201110408136A CN103138235A CN 103138235 A CN103138235 A CN 103138235A CN 201110408136 CN201110408136 CN 201110408136 CN 201110408136 A CN201110408136 A CN 201110408136A CN 103138235 A CN103138235 A CN 103138235A
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Abstract
The invention discloses a power transformer no-load automatic power-off device. When a certain amount of load exists on the low-voltage side of a power transformer, a current mutual inductor has current, voltage signals are amplified by an audion after being rectified by a diode, a transistor is powered on, a capacitor is in short circuit, a relay does not have electricity, and a breaker does not act. When the power transformer has no load and the current mutual inductor has no current, a transistor amplifier is cut off, and the capacitor is charged through a resistor. When the voltage rises to a certain value, a field effect audion is powered on, the relay obtains electricity, a normally open contact on the relay is pulled in, a breaker trip coil is powered on, the breaker trips, a high-voltage loop is cut to supply electricity, and the transformer is out of operation. The capacitor is charged for 20-30 minutes through the resistor, the high-voltage breaker can be chosen from CG 50 or CG-100, and an oil circuit breaker and a vacuum breaker with columns of electricity control can be chosen. The power transformer no-load automatic power-off device has the advantages of improving grid security and reducing unnecessary power loss.
Description
Technical field:
The present invention relates to a kind of power transformer idling auto-power-off device, be specially adapted to electric power system and use.
Background technology:
The low load with strong power phenomenon often appears in the power distribution station some transformers, particularly in the rural area in the irrigation and drainage district with irrigation season occurs normal duty, when night, rainy day and non-irrigation season, zero load phenomenon can appear again, if untimely cutoff high power supply, will cause the long-time no-load running of distribution transforming, for example: the power transformer no-load running of a 100KVA will consume the power of six, seven hectowatts, take a county as example, there are four, 500 agricultures to fill with distribution transforming and calculate, will cause very large power consumption like this.
Summary of the invention:
Task of the present invention be propose a kind of in the situation that transformer not load in time do not automatically terminate high voltage supply, when reaching wastage reducing and energy saving again, the power transformer idling auto-power-off device of economical operation again.task of the present invention is completed like this, it is characterized in that: when low-tension side of power transformer has certain load, at this moment current transformer just has electric current, voltage signal is amplified by triode through after diode rectification, transistor turns, capacitor is by short circuit, relay must not be electric, circuit breaker is failure to actuate, when power transformer is zero load, during the current transformer no current, ended by crystal amplifier, capacitor charges through resistance, when voltage is elevated to certain value, the fet conducting, at this moment relay gets electric, normally opened contact adhesive on relay, power up for the circuit breaker tripping coil, circuit breaker trip, the cutoff high loop power supply, make transformer out of service.Described capacitor was through 20-30 minute resistance charging interval.The optional CG-50 of primary cut-out or CG-100 also can select on post with automatically controlled bulk-oil circuit-breaker and vacuum circuit-breaker.The present invention has following effect: transformer can in time be removed high voltage supply in the situation that do not load, whole like this electrical network just can reduce a lot of power consumptions, when reaching wastage reducing and energy saving, improve power grid security, economical operation effect, reduce unnecessary power consumption, energy-saving and emission-reduction reduce the artificial open-air operation that has a power failure.
Description of drawings:
Accompanying drawing is circuit structure diagram of the present invention.
Embodiment:
Describe embodiment in detail in conjunction with above accompanying drawing, in figure, LH is current transformer, and LB is sensor coil, is the element that the measuring transformer load current changes, BG1 is crystal amplifier, GB2 is the single-crystal mass triode, and R1, C1, C2 are the ∏ mode filters, and B1 is power transformer, B2 is rectifier transformer, R2, R3 are that resistance C3 is capacitor, and J is relay, and ZK is circuit breaker.
when closing circuit breaker ZK, transformer B1 brings into operation, by the LH current transformer, the LB sensor coil is measured power transformer B1 load current, when low-tension side of power transformer has certain load, the LH current transformer just has electric current, at this moment after electric current process diode D1 rectification, by R1, C1, C2 ∏ mode filter amplifies voltage signal by BG1, at this moment crystal amplifier BG1 conducting, capacitor C3 (deletion is charged) charges, thereby by short circuit, transistor triode BG2 cut-off, the relay J no current passes through, circuit breaker ZK is failure to actuate, when power transformer B1 is zero load, current transformer LH no current is ended by crystal amplifier BG1, at this moment capacitor C3 is through resistance R 3 chargings, approximately charging is 20-30 minute, when capacitor voltage at both ends is elevated to certain value (12V), the conducting of BG2 transistor triode, coil on relay J gets electric, normally opened contact adhesive on relay, power up for circuit breaker ZK tripping coil, circuit breaker trip, the cutoff high loop power supply, make transformer out of service.The power transformer idling auto-power-off device can be contained on transformer upper end or electric pole, roll off the production line through high voltage source and access by circuit breaker on the high-tension coil of three-phase transformer, the optional CG-50 of primary cut-out or CG-100 also can select on post with automatically controlled bulk-oil circuit-breaker or vacuum circuit-breaker.
Claims (3)
1. power transformer idling auto-power-off device, it is characterized in that: when low-tension side of power transformer has certain load, at this moment current transformer just has electric current, voltage signal is amplified by triode through after diode rectification, transistor turns, capacitor is by short circuit, relay must not be electric, circuit breaker is failure to actuate, when power transformer is zero load, during the current transformer no current, ended by crystal amplifier, capacitor charges through resistance, when voltage is elevated to certain value, the fet conducting, at this moment relay gets electric, normally opened contact adhesive on relay, power up for the circuit breaker tripping coil, circuit breaker trip, the cutoff high loop power supply, make transformer out of service.
2. according to claim power transformer idling auto-power-off device, it is characterized in that: described capacitor was through 20-30 minute resistance charging interval.
3. according to claim power transformer idling auto-power-off device, it is characterized in that: the optional CG-50 of primary cut-out or CG-100, also can select on post with automatically controlled bulk-oil circuit-breaker and vacuum circuit-breaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110408136 CN103138235A (en) | 2011-12-02 | 2011-12-02 | Power transformer no-load automatic power-off device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110408136 CN103138235A (en) | 2011-12-02 | 2011-12-02 | Power transformer no-load automatic power-off device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103138235A true CN103138235A (en) | 2013-06-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110408136 Pending CN103138235A (en) | 2011-12-02 | 2011-12-02 | Power transformer no-load automatic power-off device |
Country Status (1)
| Country | Link |
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| CN (1) | CN103138235A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105305379A (en) * | 2015-10-31 | 2016-02-03 | 广东新昇电业科技股份有限公司 | Power frequency transformer low-zero-load power consumption control circuit |
| CN106992491A (en) * | 2017-06-02 | 2017-07-28 | 常州机电职业技术学院 | Large power-consuming equipment power off in standby state of electric energy saver and its power-off energy saving method |
| CN113097023A (en) * | 2021-04-06 | 2021-07-09 | 苏州电力设计研究院有限公司 | Circuit breaker based on integrated power supply system of transformer substation |
| CN113859023A (en) * | 2021-10-13 | 2021-12-31 | 贵州师范大学 | Three-level automatic control system and circuit for reducing no-load loss of electric automobile charging pile |
-
2011
- 2011-12-02 CN CN 201110408136 patent/CN103138235A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105305379A (en) * | 2015-10-31 | 2016-02-03 | 广东新昇电业科技股份有限公司 | Power frequency transformer low-zero-load power consumption control circuit |
| CN106992491A (en) * | 2017-06-02 | 2017-07-28 | 常州机电职业技术学院 | Large power-consuming equipment power off in standby state of electric energy saver and its power-off energy saving method |
| CN106992491B (en) * | 2017-06-02 | 2019-07-02 | 常州机电职业技术学院 | Large power-consuming equipment power off in standby state of electric energy saver and its power-off energy saving method |
| CN113097023A (en) * | 2021-04-06 | 2021-07-09 | 苏州电力设计研究院有限公司 | Circuit breaker based on integrated power supply system of transformer substation |
| CN113097023B (en) * | 2021-04-06 | 2023-09-22 | 苏州电力设计研究院有限公司 | Circuit breaker based on integrated power supply system of transformer substation |
| CN113859023A (en) * | 2021-10-13 | 2021-12-31 | 贵州师范大学 | Three-level automatic control system and circuit for reducing no-load loss of electric automobile charging pile |
| CN113859023B (en) * | 2021-10-13 | 2024-04-19 | 贵州师范大学 | Three-level automatic control system and circuit for reducing no-load loss of electric automobile charging pile |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130605 |