CN102360880B - Ferroresonance-preventing self-power supply device of electronic voltage transformer - Google Patents
Ferroresonance-preventing self-power supply device of electronic voltage transformer Download PDFInfo
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- CN102360880B CN102360880B CN 201110233402 CN201110233402A CN102360880B CN 102360880 B CN102360880 B CN 102360880B CN 201110233402 CN201110233402 CN 201110233402 CN 201110233402 A CN201110233402 A CN 201110233402A CN 102360880 B CN102360880 B CN 102360880B
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- 238000013016 damping Methods 0.000 claims abstract description 32
- 238000006243 chemical reaction Methods 0.000 claims abstract description 31
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 22
- 238000001914 filtration Methods 0.000 claims abstract description 20
- 238000004804 winding Methods 0.000 claims description 19
- 239000000203 mixture Substances 0.000 claims description 6
- 238000002955 isolation Methods 0.000 abstract 4
- 230000005329 antiferromagnetic resonance Effects 0.000 abstract 1
- 230000005350 ferromagnetic resonance Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 229920006395 saturated elastomer Polymers 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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Abstract
The invention discloses an anti-ferroresonance self-powered device of an electronic voltage transformer, which comprises the electronic voltage transformer, a damping resistor, an energy supply transformer, an isolation transformer and a rectification filtering voltage stabilizing circuit, wherein the damping resistor is arranged between the electronic voltage transformer and the isolation transformer; at least one end of a primary coil of the energy supply transformer is connected in series with a damping resistor and then is connected in parallel with two primary ends of the electronic voltage transformer; the secondary coil of the energy supply transformer is connected with the isolation transformer, the secondary output end of the isolation transformer is connected with the rectification filtering voltage stabilizing circuit, and the output end of the rectification filtering voltage stabilizing circuit is connected with the secondary voltage signal conversion circuit; and the secondary voltage signal output end of the electronic voltage transformer is connected with the input end of the secondary voltage signal conversion circuit, and the secondary voltage signal output by the electronic voltage transformer is converted by the secondary voltage signal conversion circuit and then outputs the converted secondary voltage signal. The invention provides an anti-ferromagnetic resonance self-power supply device of an electronic transformer, which can not generate excessive resonance current and achieve the aim of preventing ferromagnetic resonance.
Description
[technical field]
The present invention relates to the electric network measuring and controlling technical field, specifically is the anti-ferro resonance self-power supply device of electronic type voltage transformer.
[background technology]
Easy and the electrical network generation ferro resonance of used electromagnetic potential transformer causes the high pressure fuse melting, even causes the voltage transformer blast, jeopardizes power grid security.Electronic type voltage transformer itself does not produce ferro resonance, but output power signal is very little, needs external low-tension supply to provide working power for secondary electron instrument and meters such as its secondary singal translation circuit and electric energy meters.Though there is employing to connect the electromagnetic potential transformer power supply in addition, need not external low-tension supply, but do not take the anti-magnetically saturated problem of electromagnetic potential transformer, solve the easy and electrical network generation ferro resonance of electromagnetic potential transformer of power supply, cause the high pressure fuse melting, even cause the blast of supply power voltage instrument transformer, jeopardize problems such as power grid security.
[summary of the invention]
The present invention has overcome the deficiencies in the prior art, provides a kind of and can not produce excessive resonance current, reaches the anti-ferro resonance self-power supply device of electronic mutual inductor of the purpose of anti-ferro resonance.
For achieving the above object, the present invention has adopted following technical proposal:
A kind of electronic type voltage transformer is prevented the ferro resonance self-power supply device, comprises electronic type voltage transformer, damping resistance, energy supply transformer, isolating transformer, rectification filtering voltage stabilizing circuit; The primary winding of described energy supply transformer is connected in parallel on electronic type voltage transformer two ends once after having an end series damping resistor at least; The secondary coil of described energy supply transformer connects described isolating transformer, the described rectification filtering voltage stabilizing circuit of secondary output termination of isolating transformer, the output termination secondary voltage signal conversion circuit of rectification filtering voltage stabilizing circuit; The secondary voltage signal output part of described electronic type voltage transformer is connected with secondary voltage signal conversion circuit input, the secondary voltage signal of electronic type voltage transformer output by the conversion of secondary voltage signal conversion circuit after secondary voltage signal behind the output transform.
Described damping resistance adopts linear resistance, and the primary winding of described energy supply transformer is connected in parallel on electronic type voltage transformer two ends once after having end series connection linear resistance at least.
Described damping resistance adopts semistor, and the primary winding of described energy supply transformer is connected in parallel on electronic type voltage transformer two ends once after having end series connection semistor at least.
Described damping resistance adopts the series resistance of semistor and linear resistance composition, and the primary winding of described energy supply transformer has at least an end to connect to be connected in parallel on electronic type voltage transformer two ends once after the described series resistance.
Described damping resistance adopts the parallel resistance of semistor and linear resistance composition, and the primary winding of described energy supply transformer has at least an end to connect to be connected in parallel on electronic type voltage transformer two ends once after the described parallel resistance.
The invention has the beneficial effects as follows:
1, behind series damping resistor on the energy supply transformer primary winding, when unexpected combined floodgate or capacitor discharge take place when, because damping resistance is bigger, charging current greatly reduces, iron core is difficult for saturated, and the figure of merit value in loop reduces greatly, can not produce excessive resonance current, thereby reach the purpose of anti-ferro resonance, improved fail safe and the reliability of whole device.
2, because the present invention presses signal and power taking can be placed on same position power taking, be divided into two different branch roads again and transmit output, so can the branch road series connection not go up the accuracy that big resistance influences voltage signal because getting, though can influence the internal resistance of energy supply power supply, but because the working power that need provide is direct current, and power demand is generally not very big, can be easy to solve by voltage stabilizing circuit, thereby can realize both having prevented ferro resonance, need not external working power again influences reliability, even can accomplish with existing electromagnetic transformer compatible fully.
3, damping resistance of the present invention, different compositions also has different separately beneficial effects.It is simple to adopt linear resistance to constitute; Adopt semistor, when resonance current increased, temperature raise, and resistance increases, and can strengthen the ability that suppresses resonance current; Adopt semistor to connect with linear resistance or the semistor temperature characterisitic that can improve damping resistance in parallel with linear resistance.
[description of drawings]
Fig. 1 is the circuit theory diagrams that do not have the equivalent resonant tank of series damping resistor on winding of energy supply transformer;
Fig. 2 is the circuit theory diagrams that are in series with the equivalent resonant tank of damping resistance R at winding of energy supply transformer;
Fig. 3 is the schematic diagram that damping resistance adopts the anti-ferro resonance electric supply installation of electronic type voltage transformer of linear resistance;
Fig. 4 is the schematic diagram that damping resistance adopts the anti-ferro resonance electric supply installation of electronic type voltage transformer of semistor;
Fig. 5 is the schematic diagram that electronic type voltage transformer that damping resistance adopts semistor to connect with linear resistance is prevented the ferro resonance self-power supply device;
Fig. 6 is the schematic diagram that damping resistance adopts the anti-ferro resonance self-power supply device of the semistor electronic type voltage transformer in parallel with linear resistance.
[specific embodiment]
A kind of electronic type voltage transformer is prevented the ferro resonance self-power supply device, comprises electronic type voltage transformer 1, damping resistance 2, energy supply transformer 3, isolating transformer 4A, rectification filtering voltage stabilizing circuit 4B; The primary winding of described energy supply transformer 3 is connected in parallel on electronic type voltage transformer 1 two ends once after having an end series damping resistor 2 at least; The secondary coil of described energy supply transformer 3 meets described isolating transformer 4A, the described rectification filtering voltage stabilizing circuit 4B of secondary output termination of isolating transformer 4A, the output termination secondary voltage signal conversion circuit 5 of rectification filtering voltage stabilizing circuit 4B; The secondary voltage signal output part of described electronic type voltage transformer 1 is connected with secondary voltage signal conversion circuit 5 inputs, the secondary voltage signal of electronic type voltage transformer 1 output by 5 conversion of secondary voltage signal conversion circuit after secondary voltage signal behind the output transform.
Because the composition mode difference of antihunt circuit 2, the present invention can adopt various embodiments, and is specific as follows:
Embodiment 1: referring to Fig. 3, described damping resistance 2 adopts linear resistance, and the primary winding of described energy supply transformer 3 is connected in parallel on electronic type voltage transformer 1 two ends once after having end series connection linear resistance at least; The secondary coil of described energy supply transformer 3 meets described isolating transformer 4A, the described rectification filtering voltage stabilizing circuit 4B of secondary output termination of isolating transformer 4A, the output termination secondary voltage signal conversion circuit 5 of rectification filtering voltage stabilizing circuit 4B; The secondary voltage signal output part of described electronic type voltage transformer 1 is connected with secondary voltage signal conversion circuit 5 inputs, the secondary voltage signal of electronic type voltage transformer 1 output by 5 conversion of secondary voltage signal conversion circuit after secondary voltage signal behind the output transform.
Embodiment 2: referring to Fig. 4, described damping resistance 2 adopts semistor.The primary winding of described energy supply transformer 3 is connected in parallel on electronic type voltage transformer 1 two ends once after having end series connection semistor at least; The secondary coil of described energy supply transformer 3 meets described isolating transformer 4A, the described rectification filtering voltage stabilizing circuit 4B of secondary output termination of isolating transformer 4A, the output termination secondary voltage signal conversion circuit 5 of rectification filtering voltage stabilizing circuit 4B; The secondary voltage signal output part of described electronic type voltage transformer 1 is connected with secondary voltage signal conversion circuit 5 inputs, the secondary voltage signal of electronic type voltage transformer 1 output by 5 conversion of secondary voltage signal conversion circuit after secondary voltage signal behind the output transform.
Embodiment 3: referring to Fig. 5, and the series resistance that described damping resistance 2 adopts semistor and linear resistance to form.Be connected in parallel on electronic type voltage transformer 1 two ends once after the series resistance that the primary winding of described energy supply transformer 3 has at least end series connection semistor and linear resistance to form; The secondary coil of described energy supply transformer 3 meets described isolating transformer 4A, the described rectification filtering voltage stabilizing circuit 4B of secondary output termination of isolating transformer 4A, the output termination secondary voltage signal conversion circuit 5 of rectification filtering voltage stabilizing circuit 4B; The secondary voltage signal output part of described electronic type voltage transformer 1 is connected with secondary voltage signal conversion circuit 5 inputs, the secondary voltage signal of electronic type voltage transformer 1 output by 5 conversion of secondary voltage signal conversion circuit after secondary voltage signal behind the output transform.
Embodiment 4: referring to Fig. 6, described damping resistance 2 adopts semistor and linear resistance to form parallel resistance, and the primary winding of described energy supply transformer 3 is connected in parallel on electronic type voltage transformer 1 two ends once after having at least end series connection to form parallel resistance by semistor and linear resistance; The secondary coil of described energy supply transformer 3 meets described isolating transformer 4A, the described rectification filtering voltage stabilizing circuit 4B of secondary output termination of isolating transformer 4A, the output termination secondary voltage signal conversion circuit 5 of rectification filtering voltage stabilizing circuit 4B; The secondary voltage signal output part of described electronic type voltage transformer 1 is connected with secondary voltage signal conversion circuit 5 inputs, the secondary voltage signal of electronic type voltage transformer 1 output by 5 conversion of secondary voltage signal conversion circuit after secondary voltage signal behind the output transform.
The anti-ferro resonance basic principle of the present invention is as follows:
Described energy supply transformer is the same with electromagnetic potential transformer, it all is the inductance element of ribbon core, excite the condition of ferro resonance identical, unexpected combined floodgate, the single phase ground fault of asynchronous switch-on, unloaded bus or power transmission sequence are not eliminated suddenly again etc. as: three-phase, they have common feature, that is: shooting condition is accidental, resonance occurs in the transient process of electrical network, iron core is easily saturated, there is power-to-ground capacitance, it is very little to add the electrical network internal resistance, and energy supply transformer equivalent resistance is also very little, can equivalence become circuit as shown in Figure 1 when resonance takes place.Wherein r is the summation of the internal resistance of source and energy supply transformer equivalent resistance.When send out swashing, as unexpected combined floodgate or capacitor discharge, to the charging of energy supply transformer, r is very little because of the internal resistance of source, and electric current is bigger, and iron core takes place easily saturated, and the quality factor q value in loop is very high, is easy to generate the resonance current above the hundreds of times rated exciting current.As series damping resistor R on winding of energy supply transformer, as shown in Figure 2, when unexpected combined floodgate or capacitor discharge take place again, because R is bigger, charging current greatly reduces, and iron core is difficult for saturated, and the quality factor q value in loop reduces greatly, can not produce excessive resonance current, thereby reach the purpose of anti-ferro resonance.Because the present invention presses signal and power taking can be placed on same position power taking, be divided into two different branch roads again and transmit output, so can the branch road series connection not go up the accuracy that big resistance R influences voltage signal because getting, though can influence the internal resistance of energy supply power supply, but because the working power that need provide is direct current, and power demand is generally not very big, can be easy to solve by voltage stabilizing circuit, thereby can realize both having prevented ferro resonance, need not external working power again influences reliability, even can accomplish with existing electromagnetic transformer compatible fully.
Claims (5)
1. the anti-ferro resonance self-power supply device of electronic type voltage transformer is characterized in that comprising electronic type voltage transformer (1), damping resistance (2), energy supply transformer (3), isolating transformer (4A), rectification filtering voltage stabilizing circuit (4B); The primary winding of described energy supply transformer (3) is connected in parallel on electronic type voltage transformer (1) two ends once after having an end series damping resistor (2) at least; The secondary coil of described energy supply transformer (3) connects described isolating transformer (4A), the secondary output described rectification filtering voltage stabilizing circuit of termination (4B) of isolating transformer (4A), the output termination secondary voltage signal conversion circuit (5) of rectification filtering voltage stabilizing circuit (4B); The secondary voltage signal output part of described electronic type voltage transformer (1) is connected with secondary voltage signal conversion circuit (5) input, the secondary voltage signal of electronic type voltage transformer (1) output by secondary voltage signal conversion circuit (5) conversion after secondary voltage signal behind the output transform.
2. a kind of electronic type voltage transformer according to claim 1 is prevented the ferro resonance self-power supply device, it is characterized in that described damping resistance (2) adopts linear resistance, the primary winding of described energy supply transformer (3) is connected in parallel on electronic type voltage transformer (1) two ends once after having end series connection linear resistance at least.
3. a kind of electronic type voltage transformer according to claim 1 is prevented the ferro resonance self-power supply device, it is characterized in that described damping resistance (2) adopts semistor, the primary winding of described energy supply transformer (3) is connected in parallel on electronic type voltage transformer (1) two ends once after having end series connection semistor at least.
4. a kind of electronic type voltage transformer according to claim 1 is prevented the ferro resonance self-power supply device, it is characterized in that described damping resistance (2) adopts the series resistance of semistor and linear resistance composition, the primary winding of described energy supply transformer (3) has at least an end to connect to be connected in parallel on electronic type voltage transformer (1) two ends once after the described series resistance.
5. a kind of electronic type voltage transformer according to claim 1 is prevented the ferro resonance self-power supply device, it is characterized in that described damping resistance (2) adopts the parallel resistance of semistor and linear resistance composition, the primary winding of described energy supply transformer (3) has at least an end to connect to be connected in parallel on electronic type voltage transformer (1) two ends once after the described parallel resistance.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110233402 CN102360880B (en) | 2011-08-13 | 2011-08-13 | Ferroresonance-preventing self-power supply device of electronic voltage transformer |
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| CN 201110233402 CN102360880B (en) | 2011-08-13 | 2011-08-13 | Ferroresonance-preventing self-power supply device of electronic voltage transformer |
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| CN102360880A CN102360880A (en) | 2012-02-22 |
| CN102360880B true CN102360880B (en) | 2013-09-04 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104237634B (en) * | 2014-08-14 | 2018-03-06 | 国家电网公司 | Power distribution network PT ferro resonance failure diagnosis and cancellation element |
| CN109086562B (en) * | 2018-10-09 | 2023-09-12 | 云南电网有限责任公司红河供电局 | High-damping anti-resonance electromagnetic voltage transformer and mutual inductance method |
| CN115792781A (en) * | 2022-12-28 | 2023-03-14 | Abb瑞士股份有限公司 | Monitoring device, power equipment and method for monitoring voltage transformer |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201514851U (en) * | 2009-11-04 | 2010-06-23 | 安徽翔远电力科技有限公司 | Outdoor self-excited source three-phase combined electronic transducer metering device |
| CN201788808U (en) * | 2010-08-18 | 2011-04-06 | 广州松下空调器有限公司 | Power transformer |
| CN102024554A (en) * | 2009-09-21 | 2011-04-20 | 芮骏 | Harmonic elimination protector for electromagnetic potential transformer (PT) of three-phase electric network |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2877007Y (en) * | 2006-03-07 | 2007-03-07 | 牡丹江第一互感器厂 | Resonance-proof voltage transformer |
| US7567881B2 (en) * | 2007-03-30 | 2009-07-28 | General Electric Company | Self-adjusting voltage filtering technique compensating for dynamic errors of capacitive voltage transformers |
| CN202178148U (en) * | 2011-08-13 | 2012-03-28 | 陈劲游 | Ferroresonance-preventing self-power supply device of electronic voltage transformer |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102024554A (en) * | 2009-09-21 | 2011-04-20 | 芮骏 | Harmonic elimination protector for electromagnetic potential transformer (PT) of three-phase electric network |
| CN201514851U (en) * | 2009-11-04 | 2010-06-23 | 安徽翔远电力科技有限公司 | Outdoor self-excited source three-phase combined electronic transducer metering device |
| CN201788808U (en) * | 2010-08-18 | 2011-04-06 | 广州松下空调器有限公司 | Power transformer |
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Inventor after: Tan Baoliang Inventor before: Chen Jinyou |
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Effective date of registration: 20170410 Address after: 537400 Yulin City, Gansu Province, Gansu Province, the village of leather industry concentrated area of the city of the Guangxi Zhuang Autonomous Region Patentee after: BEILIU KESHUN ELECTRONIC CO.,LTD. Address before: Tianhe District Tong East Road Guangzhou city Guangdong province 510665 B-101 No. 5, room B-118 Patentee before: GUANGDONG GAOHANG INTELLECTUAL PROPERTY OPERATION Co.,Ltd. Effective date of registration: 20170410 Address after: Tianhe District Tong East Road Guangzhou city Guangdong province 510665 B-101 No. 5, room B-118 Patentee after: GUANGDONG GAOHANG INTELLECTUAL PROPERTY OPERATION Co.,Ltd. Address before: 528400 Zhongshan West Road, Guangdong, No. 5 East River Patentee before: Chen Jinyou |
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Granted publication date: 20130904 |