CN102064720A - Automatic energy obtaining power supply with online monitoring function - Google Patents

Automatic energy obtaining power supply with online monitoring function Download PDF

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Publication number
CN102064720A
CN102064720A CN2010105684752A CN201010568475A CN102064720A CN 102064720 A CN102064720 A CN 102064720A CN 2010105684752 A CN2010105684752 A CN 2010105684752A CN 201010568475 A CN201010568475 A CN 201010568475A CN 102064720 A CN102064720 A CN 102064720A
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CN
China
Prior art keywords
current
voltage
module
energy
power supply
Prior art date
Application number
CN2010105684752A
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Chinese (zh)
Inventor
张杭
王道军
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南京因泰莱电器股份有限公司
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Publication date
Application filed by 南京因泰莱电器股份有限公司 filed Critical 南京因泰莱电器股份有限公司
Priority to CN2010105684752A priority Critical patent/CN102064720A/en
Publication of CN102064720A publication Critical patent/CN102064720A/en

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Abstract

The invention relates to a power system automating technology, in particular to a power supply of a relay protection or automatic control device. In order to solve the problem of power supply failure under the condition of input short circuit, the power supply provides the technical scheme that current and voltage standby power supply is adopted; power supply output is normal by current energy obtainment during input short circuit; meanwhile, a current and voltage measuring function is provided. After the power supply ensures that a line is switched on, a relay protection device or automatic control device can normally work regardless of open circuit or short circuit; and the device can continuously work for a period of time by a standby power supply when the line is switched off. The invention has the advantage of strengthening the power supply reliability of the relay protection device and is suitable for the working environments of wilderness, high voltage, and the like.

Description

A kind of energy power supply of asking for on-line monitoring function
Technical field
The present invention relates to power system automation technology, the power supply of particularly a kind of relaying protection or automatic control device.
Background technology
In the protection and control device in electric power system, often take the supply power mode of Switching Power Supply.The input of Switching Power Supply is commonly 85V~265V, and its input source is divided into three aspects: the direct current cabinet power supply; Or directly come from the circuit of being powered; Or supply line obtains after by the voltage transformer step-down, and itself has backup battery direct current cabinet, even behind loss of voltage, also can continue to other device power supply.But direct current cabinet is bulky usually; Be installed in the control room, higher to environment requirement; Cost an arm and a leg.In some remote places,, join a direct current cabinet and just lose more than gain if only need one or two protective device; In the high voltage occasion, the acquisition module of photo-electricity mutual-inductor needs the output of power supply and the dielectric voltage withstand of the earth to reach up to a hundred kilovolts, and this moment, direct current cabinet also was helpless.
Power supply comes from supply line of institute, and when short circuit or ground connection occurring, voltage reduces, even is zero, and the Switching Power Supply of this moment is less than output.Even device has backup battery, when operate time of protection is longer, also can exhaust uncontrollable breaker open operation.
Summary of the invention
At the power supply plan of existing protection and control device, in order to improve the power supply reliability of field, high-pressure work environment, the present invention proposes following a kind of new technical scheme.
A kind of energy power supply of asking for on-line monitoring function, it takes the conventional switch voltage and current to ask for can be equipped with energy-provision way mutually.Comprise fast saturable inductor, current energy-taking module, energy release module, current detection module, switch power module, voltage monitoring module, be equipped with supply module, DC_DC output module mutually.Be primarily characterized in that: fast saturable inductor once big electric current (100A~50kA) becomes the little electric current of secondary (0~50A); The current energy-taking module to the electric capacity charging, is exported the direct current signal of 9V~24V by rectification, filtering; When electric current is very big, when the electric capacity charging surpasses 24V, by the energy release module unnecessary electric energy is passed through the metal-oxide-semiconductor conducting, and voltage maintains 24V; Current detection module passes through the real-time sensed current signal of difference channel, and exports 0~5V and measure usefulness for the back level; Switching Power Supply becomes the alternating current-direct current signal of 85V~265V the output signal of 12V; Voltage detection module is passed through the real-time detectable voltage signals of difference channel, and exports 0~5V and measure usefulness, Real-time Alarm for the back level; Mutual supply module is fully chosen the bigger power supply of current energy and is exported for the back level; DC_DC output is converted to the output of 5V direct current efficiently with the direct current signal of 9V~24V, uses for protective relaying device and control device.
Description of drawings
Fig. 1 is the scantling plan of the embodiment of the invention.
Fig. 2 is the current energy-taking module and the energy release module schematic diagram of the embodiment of the invention.
Fig. 3 is the current detection module schematic diagram of the embodiment of the invention.
Fig. 4 is the voltage detection module schematic diagram of the embodiment of the invention.
Fig. 5 is the mutual supply module schematic diagram that is equipped with of the embodiment of the invention.
Embodiment
The present invention is specifically introduced as follows below in conjunction with accompanying drawing:
Design of the present invention comprises (as shown in Figure 1): fast saturable inductor, current energy-taking module, energy release module, current detection module, switch power module, voltage monitoring module, be equipped with supply module, DC_DC output module mutually.
1, fast saturable inductor
The speed saturable inductor is incited somebody to action once big electric current, and (100A~(0~50A), making things convenient for secondary to get can use 50kA) to become the little electric current of secondary.The speed saturable inductor is not very high to required precision, has fast saturated characteristic, and electric current is near rated value the time, and coil working is output into linear scale and changes at linear zone; When line fault, short circuit is tens times of rated current, and coil working has suppressed the growth of output current in the saturation region, thereby avoids the excessive open circuit that causes of output capacity further to produce high pressure.
2, current energy-taking module, energy release module (as shown in Figure 2)
The current energy-taking module can series resistance obtains voltage, supplies with back level energy, but resistance itself also can consumed power, so conversion efficiency is very low.Utilizing electric capacity to come stored energy among the present invention, is direct current with the alternating current rectification earlier, obtains suitable voltage by charging to electric capacity.Electric capacity has withstand voltage restriction, when electric current bigger, back level energy consumption more after a little while, voltage can be more and more higher, causes capacitance damage.Therefore designed the energy release module among the present invention: if capacitance voltage is too high, comparator can be exported high level, causes the metal-oxide-semiconductor conducting, and this moment, electric current can pass through metal-oxide-semiconductor direct short-circuit, and energy can not be accumulated to back level electric capacity; When capacitance voltage is reduced to threshold value, the comparator output low level, metal-oxide-semiconductor ends, and electric current can continue to charge to electric capacity.Because voltage is very low during the metal-oxide-semiconductor conducting, so also just can not produce too much heat.
3, switch power module
High voltage ac/dc voltage input variable is converted to the output of 12V direct current.
4, current detection module, voltage detection module (as shown in Figure 3, Figure 4)
Can detect current value, magnitude of voltage in real time among the present invention.
In order to reduce the power consumption in whole loop, the high-accuracy sampling resistance of one 10 milliohm of in current circuit, having connected, this loss is about 1% of whole power.Small-signal sampling of the present invention adopts difference to amplify, and has the common mode inhibition effect: allow input to have certain common mode poor on the one hand, sampled signal can directly insert; Suppressed the influence of noise on the other hand to the back level.
Voltage detection module is similar to current detection module, does not just have sample resistance, and voltage step-down is imported.Difference is amplified two effects of playing: the voltage conditioning; Resistive isolation can effectively be isolated the high pressure of input and the low pressure of output.
5, be equipped with supply module (as shown in Figure 5) mutually
The present invention selects the higher input of current voltage by ending with on state characteristic of diode, and promptly coming from switch power module still is the current energy-taking module.Carry out battery charging and discharging management, power management by battery management chip then.Can export stable, reliable D.C. regulated power supply.
Though the present invention is with preferred embodiment openly as above, they are not to be used for limiting the present invention, anyly have the knack of this skill person, without departing from the spirit and scope of the invention, and certainly when can doing various variations or retouching, but equally within protection scope of the present invention.What therefore protection scope of the present invention should be defined with the application's claim protection range is as the criterion.

Claims (6)

  1. One kind have asking for of on-line monitoring function can power supply, it comprises fast saturable inductor, current energy-taking module, energy release module, current detection module, switch power module, voltage monitoring module, is equipped with supply module, DC_DC output module mutually, and it is characterized in that: described fast saturable inductor once big electric current becomes the little electric current of secondary; Described current energy-taking module is by rectification, filtering, be direct current with the alternating current rectification earlier, obtain suitable voltage by charging to electric capacity, electric capacity has withstand voltage restriction, when capacitance voltage surpasses threshold value, unnecessary electric energy is passed through the metal-oxide-semiconductor conducting by described energy release module; Described current detection module is by the real-time sensed current signal of difference channel; Described switch power module becomes the alternating current-direct current signal output signal of direct current; Described voltage detection module is by the real-time detectable voltage signals of difference channel; Described mutual supply module is fully chosen the bigger power supply of current energy and is exported for the back level.
  2. 2. the energy power supply of asking for on-line monitoring function according to claim 1, it is characterized in that: described fast saturable inductor is incited somebody to action once big electric current, and (100A~(0~50A), making things convenient for secondary to get can use 50kA) to become the little electric current of secondary.
  3. 3. the energy power supply of asking for on-line monitoring function according to claim 1, it is characterized in that: described current energy-taking module series resistance obtains voltage, supply with back level energy, utilize electric capacity to come stored energy, be direct current with the alternating current rectification earlier, obtain suitable voltage by charging to electric capacity; Described electric capacity has withstand voltage restriction, when electric current bigger, back level energy consumption more after a little while, voltage can be more and more higher, if capacitance voltage is too high, when surpassing threshold value, the comparator of described energy release module can be exported high level, cause the metal-oxide-semiconductor conducting, this moment, electric current can pass through metal-oxide-semiconductor direct short-circuit, and energy can not be accumulated to back level electric capacity; When capacitance voltage is reduced to threshold value, the comparator output low level of described energy release module, metal-oxide-semiconductor ends, and electric current can continue to charge to electric capacity.
  4. 4. the energy power supply of asking for on-line monitoring function according to claim 1, it is characterized in that: described switch power module is converted to the output of 12V direct current with high voltage ac/dc voltage input variable.
  5. 5. the energy power supply of asking for on-line monitoring function according to claim 1, it is characterized in that: described current detection module, voltage detection module detect current value, magnitude of voltage in real time; In order to reduce the power consumption in whole loop, the high-accuracy sampling resistance of one 10 milliohm of in current circuit, having connected, this loss is about 1% of whole power, and the small-signal sampling adopts difference to amplify, and has the common mode inhibition effect; The high-accuracy sampling resistance of also having connected in voltage circuit is imported voltage step-down.
  6. 6. the energy power supply of asking for on-line monitoring function according to claim 1, it is characterized in that: the described supply module that is equipped with is mutually selected the higher input of current voltage by ending with on state characteristic of diode, promptly coming from switch power module still is the current energy-taking module, carries out battery charging and discharging management, power management by battery management chip then.
CN2010105684752A 2010-12-01 2010-12-01 Automatic energy obtaining power supply with online monitoring function CN102064720A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN2010105684752A CN102064720A (en) 2010-12-01 2010-12-01 Automatic energy obtaining power supply with online monitoring function

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CN102064720A true CN102064720A (en) 2011-05-18

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102638157A (en) * 2012-05-02 2012-08-15 株洲南车时代电气股份有限公司 Unit H-bridge module bypass circuit of chain type static synchronous compensator (STATCOM)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63299769A (en) * 1987-05-28 1988-12-07 Fujitsu Ltd Power source device
JP2006050879A (en) * 2004-07-30 2006-02-16 Noboru Abe High power factor switching regulator circuit
CN1932908A (en) * 2006-10-26 2007-03-21 梁明 Wireless on-line monitoring system and method with electric distribution network cable connector running state
CN201365196Y (en) * 2009-01-16 2009-12-16 上海慧东电气设备有限公司 Device for collecting power from high-voltage cable
CN201466987U (en) * 2009-06-09 2010-05-12 中国电力科学研究院 Device for obtaining electric energy from power transmission cable
CN101867231A (en) * 2010-06-28 2010-10-20 国网电力科学研究院武汉南瑞有限责任公司 High-voltage side mutual inductance energy-acquiring device of high-voltage power transmission line
CN201956914U (en) * 2010-12-01 2011-08-31 南京因泰莱电器股份有限公司 Self-energizing power supply with on-line monitoring function

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63299769A (en) * 1987-05-28 1988-12-07 Fujitsu Ltd Power source device
JP2006050879A (en) * 2004-07-30 2006-02-16 Noboru Abe High power factor switching regulator circuit
CN1932908A (en) * 2006-10-26 2007-03-21 梁明 Wireless on-line monitoring system and method with electric distribution network cable connector running state
CN201365196Y (en) * 2009-01-16 2009-12-16 上海慧东电气设备有限公司 Device for collecting power from high-voltage cable
CN201466987U (en) * 2009-06-09 2010-05-12 中国电力科学研究院 Device for obtaining electric energy from power transmission cable
CN101867231A (en) * 2010-06-28 2010-10-20 国网电力科学研究院武汉南瑞有限责任公司 High-voltage side mutual inductance energy-acquiring device of high-voltage power transmission line
CN201956914U (en) * 2010-12-01 2011-08-31 南京因泰莱电器股份有限公司 Self-energizing power supply with on-line monitoring function

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102638157A (en) * 2012-05-02 2012-08-15 株洲南车时代电气股份有限公司 Unit H-bridge module bypass circuit of chain type static synchronous compensator (STATCOM)

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