CN105790430A - Quick-switching combined electrical appliance - Google Patents

Quick-switching combined electrical appliance Download PDF

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Publication number
CN105790430A
CN105790430A CN201610278660.5A CN201610278660A CN105790430A CN 105790430 A CN105790430 A CN 105790430A CN 201610278660 A CN201610278660 A CN 201610278660A CN 105790430 A CN105790430 A CN 105790430A
Authority
CN
China
Prior art keywords
combined electrical
control unit
switching
hgis
module
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610278660.5A
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Chinese (zh)
Inventor
包红旗
文化宾
苗世华
张闪
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Power New Energy Smart Grid Technology Co Ltd
Original Assignee
China Power New Energy Smart Grid Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China Power New Energy Smart Grid Technology Co Ltd filed Critical China Power New Energy Smart Grid Technology Co Ltd
Priority to CN201610278660.5A priority Critical patent/CN105790430A/en
Publication of CN105790430A publication Critical patent/CN105790430A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/061Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads

Abstract

The invention relates to a quick-switching combined electrical appliance which comprises the components of a control unit, a switching characteristic measuring unit and two HGIS combined electrical appliances. Each HGIS combined electrical appliance is provided with a current transformer and a voltage transformer. The current transformer and the voltage transformer are electrically connected with the signal input end of the control unit. The signal output end of the control unit is connected with a switching on/off loop of a circuit breaker operation mechanism in each HGIS combined electrical appliance. A switching characteristic measuring unit is connected with total switching characteristic sampling loops in the circuit breaker operation mechanism in each HGIS combined electrical appliance. The switching characteristic measuring unit is connected with the signal input end of the control unit. Circuit breakers in each HGIS combined electrical appliance are vacuum circuit breakers, and the circuit breaker operation mechanisms are electromagnetic repulsive operation mechanisms. The quick-switching combined electrical appliance has advantages of high switching speed and small impact to a power grid in switching process. Furthermore the quick-switching combined electrical appliance realizes optimal matching of high-voltage vacuum switch, medium-voltage vacuum switch, low-voltage vacuum switch and an automatic quick-switching device.

Description

Very fast suit combined electrical apparatus
Technical field
The present invention relates to ultrafast very fast of the automatic switchover combined electrical apparatus, particularly switch speed of a kind of dual power supply and suit combined electrical apparatus.
Background technology
At large size industrial enterprises such as petrochemical industry, iron and steel and collieries, owing to producing continuously and the importance of safety, all carrying out dual power supply configuration in each electric pressure, purpose be exactly under a certain power failure condition, is put into by another power supply, so that production is continued.For a long time, transformer station widely uses backup auto-activating device or the switching to realize between working power and stand-by power supply of the dual power supply handover module.In recent years, become along with the high factory of the power supply rapid switching device station service electrical system in power plant and play the successful Application of switching between standby change, the power supply rapid switching device being specially adapted for Gong Qi transformer station also arises at the historic moment, use to a certain extent is obtained in enterprises such as middle petrochemical industry, operating switch is quickly disconnected when the working power caused because of faults such as thunderbolts disappears, close backup circuit breaker, by in-put of spare power supply to guarantee the uninterrupted operation producing load.
Owing to power supply rapid switching device is used only to control the secondary device of chopper deciliter; within the logical operations of itself and response time can accomplish a cycle; but a few tens of milliseconds at least deciliter time of now widely used vacuum circuit breaker; milliseconds up to a hundred at most; can not this makes the power supply handoff procedure time under whole working power failure condition elongate, directly influenced power load and shut down operation in the process.Meanwhile, owing to existing power supply apparatus for fast switching can only control deciliter opportunity of operating switch and backup circuit breaker, can not deciliter time of left-right switch, even if causing handover success because the switch deciliter time is longer, the situation producing load still interrupt run occurs repeatedly.
It is particularly problematic that above-mentioned Problems existing brings in low pressure 380V field; catalyst and converter is often used due to low-voltage load; no matter it is catalyst or converter; to shaking, electric reaction is all very sensitive; general busbar voltage continues lower than 85% namely to disconnect about a cycle, causes that load is shut down;And the branch wire time of the service entrance switch of 380V bus generally will reach about 60 milliseconds, so no matter how soon power supply rapid switching device logical judgment and response time have, the load guaranteed under incoming power failure condition that all cannot play a role runs without interruption.
For these reasons, developing that a kind of deciliter time is short and the very fast combined electrical apparatus that suits that the impact of electrical network and the fluctuation of voltage are all very little is necessary by handoff procedure, this case is given birth to therefrom.
Summary of the invention
The present invention adopts controlled having cut-off with controlled switching Technology design very fast to suit combined electrical apparatus, it is possible to the fast starting switching when working power breaks down, and puts into stand-by power supply, shortens excision fault and puts into the overall time of stand-by power supply.
To achieve these goals, the technical solution adopted in the present invention is:
Very fast suit combined electrical apparatus, including control unit, switching characteristic measuring unit and two set HGIS combined electrical apparatuses, often set HGIS combined electrical apparatus is mounted on current transformer and voltage transformer, often the current transformer on set HGIS combined electrical apparatus and voltage transformer all electrically connect with the signal input part of control unit, the signal output part of control unit connects the divide-shut brake loop of the breaker operation mechanism often overlapped in HGIS combined electrical apparatus, switching characteristic measuring unit is connected with whole switching characteristic sampling circuits of the breaker operation mechanism in often set HGIS combined electrical apparatus, switching characteristic measuring unit connects the signal input part of control unit, chopper in described often set HGIS combined electrical apparatus is vacuum circuit breaker, breaker operation mechanism is electromagnetic repulsion force operating mechanism;Described switching characteristic measuring unit is for detecting the acting characteristic of HGIS combined electrical apparatus and feeding back to control unit, and described control unit is for judging the malfunction of working power and sending divide-shut brake instruction to breaker operation mechanism in HGIS combined electrical apparatus.
Further setting as technique scheme:
The control cable of the described breaker operation mechanism often overlapping HGIS combined electrical apparatus is drawn from its secondary terminal box or aviation plug, and the outlet of control unit and switching characteristic measuring unit is all drawn from respective secondary terminals row or aviation plug.
The current transformer installed on described often set HGIS combined electrical apparatus and the outlet of voltage transformer are all drawn from respective secondary terminal box.
Described switching characteristic measuring unit includes being respectively arranged in the sensor on the breaker operation mechanism often overlapping HGIS combined electrical apparatus and switching input module, often the sensor on set HGIS combined electrical apparatus is sequentially connected with analogue filter circuit and is connected with A/D module by multiplexer with after sampling hold circuit, A/D module connects the signal input part of MCU module, and switching input module is connected with the signal input part of MCU module by photoelectric isolating circuit.
Described MCU module comprises super I/O chip.
Described switching characteristic measuring unit realizes the transmission of data by parallel interface.
Described control unit includes the analogue filter circuit, sampling hold circuit, multiplexer and the A/D module that are sequentially connected with the current transformer often overlapped in HGIS combined electrical apparatus and voltage transformer, A/D module connects the signal input part of MCU module, breaker operation mechanism in the signal output part connection of MCU module often set HGIS combined electrical apparatus.
Described control unit realizes the transmission of data each through parallel interface.
Described MCU module comprises super I/O chip.
Described control unit also includes the key-press module that the signal input part with MCU module is connected and the display module being connected with the signal output part of MCU module.
The very fast intelligences combination electrical equipment that suits provided by the invention, selects the vacuum circuit breaker with electromagnetic repulsion force operating mechanism, in conjunction with controlled switching technology, solves the conventional power source slow-footed problem of switching device divide-shut brake;Simultaneously, utilize switching characteristic measuring unit that working power relevant parameter is monitored in real time, the fault-signal of trouble power can be quickly captured in the very first time, and calculate branch wire time accurately by control unit and send divide-shut brake order to breaker operation mechanism, making trouble power at current zero-crossing point moment separating brake, stand-by power supply is at voltage over zero moment asynchronous switch-on.
Phase selection of the present invention overcome tradition switching switch close a floodgate time produce shove and overvoltage the impact of electrical network is affected, phase selection separating brake improves connecting-disconnecting function and the reliability of chopper, also the technical bottleneck that vacuum circuit breaker is applied is breached at high-voltage fence, compared with the switched systems such as existing prepared auto restart, there is subversive advantage, not only can realize " not having a power failure " switching truly, escort for safety, continuously production, it is also possible to reach the best fit of senior middle school's low-voltage vacuum switch and automatization's fast switching device.
Below by way of the drawings and specific embodiments, the present invention is further elaborated.
Accompanying drawing illustrates:
Fig. 1 is the structure connection diagram of the present invention;
Fig. 2 is the control principle structured flowchart of the present invention;
Fig. 3 is the structured flowchart of switching characteristic measuring unit of the present invention;
Fig. 4 is the structured flowchart of control unit of the present invention.
Detailed description of the invention:
The present invention provides a kind of very fast combined electrical apparatus that suits to replace traditional power supply rapid switching device, has switch speed fast, and electrical network is impacted little feature by handoff procedure.
Technical scheme is further illustrated below in conjunction with Fig. 1 to Fig. 4, as shown in Figure 1, the very fast combined electrical apparatus that suits includes HGIS combined electrical apparatus 1 and a 2nd HGIS combined electrical apparatus 2, one of them combined electrical apparatus can be connected with work at present power supply, another is connected with stand-by power supply, for the ease of illustrating, the power supply that the 2nd HGIS combined electrical apparatus 2 is connected by the present embodiment is as working power, and the power supply being connected with a HGIS combined electrical apparatus 1 is as stand-by power supply.Wherein, a HGIS combined electrical apparatus 1 includes the first current transformer the 11, first voltage transformer 12 and the first vacuum circuit breaker, and the first breaker operation mechanism 13 is electromagnetic repulsion force operating mechanism;2nd HGIS combined electrical apparatus 2 includes the second current transformer the 21, second voltage transformer 22 and the second vacuum circuit breaker, and the second breaker operation mechanism 23 is electromagnetic repulsion force operating mechanism.The signal input part of whole switching characteristic sampling circuits of the first breaker operation mechanism 13 and whole switching characteristic sampling circuits of the second breaker operation mechanism 23 connecting valve characteristics measurement unit 3 respectively, the signal output part of switching characteristic measuring unit 3 connects the signal input part of control unit 4;First current transformer the 11, first voltage transformer the 12, second current transformer 21 and the second voltage transformer 22 connect the signal input part of control unit 4 respectively, and the signal output part of control unit 4 connects the divide-shut brake loop of the first breaker operation mechanism 13 and the divide-shut brake loop of the second breaker operation mechanism 23 respectively.
Connection for convenience of said structure, the control cable of the first breaker operation mechanism 13 and the second breaker operation mechanism 23 is drawn from its secondary terminal box or aviation plug, and the outlet of control unit 4 and switching characteristic measuring unit 3 is also drawn from respective secondary terminals row or aviation plug;The outlet of first current transformer the 11, first voltage transformer the 12, second current transformer 21 and the second voltage transformer 22 is all drawn from the secondary terminal box of respective equipment.
The structure of such scheme breaker in middle characteristics measurement unit 3 is further illustrated in conjunction with Fig. 3, its structure includes being respectively arranged in the sensor on the first breaker operation mechanism 13 and the second breaker operation mechanism 23 and switching input module, sensor includes Hall element, it is used for gathering the acting characteristic parameter of HGIS combined electrical apparatus, such as divide-shut brake mechanical action time and the elapsed time etc. controlling element;Switching input module is used for gathering the on off state of two HGIS combined electrical apparatuses.After each self-information collected is sequentially passed through analogue filter circuit and sampling hold circuit by sensor respectively, it is connected with A/D module by a multiplexer, MCU module is fed back to after completing the analog-to-digital conversion process of signal, after two switching input modules obtain the switching-state information of two HGIS combined electrical apparatuses respectively, it is connected with the signal input part of MCU module each via photoelectric isolating circuit.Switching characteristic measuring unit 3 adopts parallel interface to realize the transmission with control unit 4 data, and therefore, MCU module comprises super I/O chip, it is possible to converts serial data into parallel data and facilitates the transmission of data.
The structure of control unit 4 in such scheme is further illustrated in conjunction with Fig. 4, its structure includes the analogue filter circuit being sequentially connected electrically, sampling hold circuit, multiplexer, A/D module and MCU module, first current transformer 11 and the first voltage transformer 12 obtain the relevant parameter of a HGIS combined electrical apparatus 1 and (include electric current, voltage, power etc.), second current transformer 21 and the second voltage transformer 22 obtain the relevant parameter of the 2nd HGIS combined electrical apparatus 2 and (include electric current, voltage, power etc.), two-way sampled signal each keeps through analog filtering and sampling, by being completed modulus signal conversion by A/D module after a multiplexer, and feed back to MCU module;The signal output part of MCU module connects the first breaker operation mechanism 13 and the second breaker operation mechanism 23 respectively.Control unit 4 is also adopted by parallel interface and realizes the transmission with switching characteristic measuring unit 3 data, and therefore, MCU module also comprises super I/O chip, it is possible to converts serial data into parallel data and facilitates the transmission of data.For realizing the protection of different electrical power and Based Intelligent Control, the signal input part of MCU module is also associated with key-press module, it is possible to set the early warning value of working power relevant parameter, it is simple to very fast suit the combined electrical apparatus protection to working power;It is also associated with display module at the signal output part of MCU module, it is possible to the working power working status parameter of monitoring is shown in real time simultaneously.
Power supply status in work is monitored in real time by the present invention by switching characteristic measuring unit 3, and the real time data collected feeds back to the control unit 4 being attached thereto, it is possible to shown the running parameter of power supply in real time by the display module in control unit 4.Set the characterisitic parameter early warning value of working power by the key-press module in control unit 4, jointly realize monitoring and defencive function in real time to working power in conjunction with switching characteristic measuring unit 3.When working power breaks down, switching characteristic measuring unit 3 can capture fault parameter the very first time, and completes the branch wire time computing that HGIS combined electrical apparatus is real-time, and above-mentioned information is passed to control unit 4 in time;Electric current that current transformer on two HGIS combined electrical apparatuses and voltage transformer collect and Voltage Feedback are to control unit 4, frequency is calculated by control unit 4, the electric parameters such as power direction, with the judgement that the early warning value comparison set carries out fault, thus quickly starting switch logic, calculate suitable branch wire time, judge the zero crossing moment of electric current, and with curtage zero point moment in nearest moment for benchmark, according to the real-time action time that switching characteristic measuring unit 3 is tested in advance, the signal of separating brake is sent to the second breaker operation mechanism 23, the second breaker operation mechanism 23 is made to complete separating brake in the next current zero-crossing point moment;Send the signal of combined floodgate to the first breaker operation mechanism 13, make the first breaker operation mechanism 13 complete to close a floodgate in the voltage over zero moment, thus complete the cut-out of trouble power and the input of stand-by power supply.
The very fast combined electrical apparatus branch wire time each time that suits provided by the invention is not changeless, but by monitoring in real time according to starting the result that logic calculates in real time, therefore, the very fast combined electrical apparatus that suits provided by the invention is simultaneously suitable in the Various Complex situation such as station service and transformer station to use.The vacuum circuit breaker with electromagnetic repulsion force operating mechanism is adopted to be controlled by branch wire time within 10 milliseconds, it it is a few tens of milliseconds with conventional power source apparatus for fast switching branch wire time to fast a lot of compared with 100 milliseconds, fault current can quickly be excised, put into can controlling total time within 30~50 milliseconds of stand-by power supply, the load not power-off truly of abundant effective guarantee, improves safety in production reliability of operation.
Technique scheme adopts option principle, namely at current zero-crossing point moment separating brake, the voltage over zero moment closes a floodgate, overcome tradition switching switch produce the significantly high overvoltage of amplitude when divide-shut brake due to the unfixing of phase place and shove, cause the insulation breakdown of electrical equipment and the problem of reliability reduction, effectively prevent the impact to electrical network, improve the stability of system, extend service life and the time between overhauls(TBO) of HGIS combined electrical apparatus., cut-off by fault current is controlled meanwhile, be effectively increased the ability cut-offfing big electric current of chopper, decrease the abrasion of contact, breach the technical bottleneck that vacuum circuit breaker is applied at high-voltage fence.Present configuration is simple, is designed with the form of combined electrical apparatus, easy to install and use, adopts and provided by the invention very fast suits combined electrical apparatus, it is possible to reaches the best fit of senior middle school's low-voltage vacuum switch and automatization's fast switching device.
Above example is only in order to illustrate technical scheme and unrestricted, other amendments that technical scheme is made by those of ordinary skill in the art or equivalent replace, without departing from the spirit and scope of technical solution of the present invention, all should be encompassed in scope of the presently claimed invention.

Claims (10)

1. very fast suit combined electrical apparatus, it is characterized in that: include control unit, switching characteristic measuring unit and two set HGIS combined electrical apparatuses, often set HGIS combined electrical apparatus is mounted on current transformer and voltage transformer, often the current transformer on set HGIS combined electrical apparatus and voltage transformer all electrically connect with the signal input part of control unit, the signal output part of control unit connects the divide-shut brake loop of the breaker operation mechanism often overlapped in HGIS combined electrical apparatus, switching characteristic measuring unit is connected with whole switching characteristic sampling circuits of the breaker operation mechanism in often set HGIS combined electrical apparatus, switching characteristic measuring unit connects the signal input part of control unit, chopper in described often set HGIS combined electrical apparatus is vacuum circuit breaker, breaker operation mechanism is electromagnetic repulsion force operating mechanism;Described switching characteristic measuring unit is for detecting the acting characteristic of HGIS combined electrical apparatus and feeding back to control unit, and described control unit is for judging the malfunction of working power and sending divide-shut brake instruction to breaker operation mechanism in HGIS combined electrical apparatus.
2. according to claim 1 very fast suit combined electrical apparatus, it is characterized in that: the control cable of the described breaker operation mechanism often overlapping HGIS combined electrical apparatus is drawn from its secondary terminal box or aviation plug, the outlet of control unit and switching characteristic measuring unit is all drawn from respective secondary terminals row or aviation plug.
3. according to claim 1 very fast suit combined electrical apparatus, it is characterised in that: the current transformer installed on described often set HGIS combined electrical apparatus and the outlet of voltage transformer are all drawn from the secondary terminal box of respective equipment.
4. according to claim 1 very fast suit combined electrical apparatus, it is characterized in that: described switching characteristic measuring unit includes being respectively arranged in the sensor on the breaker operation mechanism often overlapping HGIS combined electrical apparatus and switching input module, often the sensor on set HGIS combined electrical apparatus is sequentially connected with analogue filter circuit and is connected with A/D module by multiplexer with after sampling hold circuit, A/D module connects the signal input part of MCU module, and switching input module is connected with the signal input part of MCU module by photoelectric isolating circuit.
5. according to claim 4 very fast suit combined electrical apparatus, it is characterised in that: described MCU module comprises super I/O chip.
6. according to claim 4 very fast suit combined electrical apparatus, it is characterised in that: described switching characteristic measuring unit realizes the transmission of data with control unit by parallel interface.
7. according to claim 1 very fast suit combined electrical apparatus, it is characterized in that: described control unit includes the analogue filter circuit, sampling hold circuit, multiplexer and the A/D module that are sequentially connected with the current transformer often overlapped in HGIS combined electrical apparatus and voltage transformer, A/D module connects the signal input part of MCU module, breaker operation mechanism in the signal output part connection of MCU module often set HGIS combined electrical apparatus.
8. according to claim 7 very fast suit combined electrical apparatus, it is characterised in that: described control unit realizes the transmission with switching characteristic measuring unit data each through parallel interface.
9. according to claim 7 very fast suit combined electrical apparatus, it is characterised in that: described MCU module comprises super I/O chip.
10. according to claim 7 very fast suit combined electrical apparatus, it is characterised in that: described control unit also includes the key-press module that the signal input part with MCU module is connected and the display module being connected with the signal output part of MCU module.
CN201610278660.5A 2016-04-29 2016-04-29 Quick-switching combined electrical appliance Pending CN105790430A (en)

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CN105790430A true CN105790430A (en) 2016-07-20

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107068504A (en) * 2017-05-05 2017-08-18 平高集团有限公司 The phase selection control method and device of a kind of dual operation mechanisms breaker
CN111431170A (en) * 2020-03-17 2020-07-17 神华神东电力有限责任公司 Factory power system of power plant

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107068504A (en) * 2017-05-05 2017-08-18 平高集团有限公司 The phase selection control method and device of a kind of dual operation mechanisms breaker
CN111431170A (en) * 2020-03-17 2020-07-17 神华神东电力有限责任公司 Factory power system of power plant

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Application publication date: 20160720