CN105896938A - Power electronic device drive circuit based on current measurement, and control method for power electronic device drive circuit - Google Patents
Power electronic device drive circuit based on current measurement, and control method for power electronic device drive circuit Download PDFInfo
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- CN105896938A CN105896938A CN201610284057.8A CN201610284057A CN105896938A CN 105896938 A CN105896938 A CN 105896938A CN 201610284057 A CN201610284057 A CN 201610284057A CN 105896938 A CN105896938 A CN 105896938A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0009—Devices or circuits for detecting current in a converter
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- Emergency Protection Circuit Devices (AREA)
Abstract
The invention relates to a power electronic device drive circuit based on current measurement and a control method for the power electronic device drive circuit, and belongs to the technical field of power electronic device drive circuits. The circuit comprises a power management module, a triggering module, a switching-on module, a switching-off module, a state monitoring module, a state feedback module, and a logic control module. The state monitoring module comprises a power monitor, a voltage monitor, a state monitor, a current monitor, and a current direct measurement sensor. The state monitoring module judges whether there is an overcurrent or not or the aging is severe or not according to a current measurement result, and feeds back the information to a hybrid DC circuit breaker control system, so as to employ a corresponding control protection strategy. The method comprises the steps: the control in a switching-off process of a hybrid DC circuit breaker and the control after the switching-off of the hybrid DC circuit breaker. The device can measure an on-state kA-level large current and an off-state mA-level leaked current, is wide in measurement frequency range, is large in range, is high in accuracy, is low in cost, is small in size, and reduces the risks of the damages of devices or the switching-off failure of a circuit breaker.
Description
Technical field
The invention belongs to power electronic devices drive circuit technical field, particularly to a kind of semiconductor drive circuit, especially relate to
And a kind of it is applied to power electronic devices drive circuit based on current measurement in mixed DC chopper.
Background technology
Dc circuit breaker is the key equipment of DC line networking.Along with the development of power electronic devices, gate turn off thyristor
GTO, insulated gate bipolar transistor IGBT, electron injection enhancement gate transistor IEGT, integrated gate commutated thyristor
The application in direct current transmission and distribution field of the device for high-power power electronic such as IGCT, emitter turn-off thyristor ETO is increasingly extensive,
It is based especially on the mixed DC chopper of power electronic devices drop-out current, it has also become the important development side of dc circuit breaker
To.Mixed DC breaker structure is as it is shown in figure 1, mainly include the through-flow branch road of Fast mechanical switch, electrically-based electronics device
The cutout branch road of part, three branch roads of energy absorption branch road and control system, be connected with control system after three branch circuit parallel connections, control
System processed controls the break-make of three branch roads.Wherein, each power electronic devices of cutout branch road is all connected with a drive circuit,
The control system of chopper controls turning on and off of power electronic devices by drive circuit.Electric current stream in the case of normally
Cross through-flow branch road；Breaker actuation when fault occurs, Fast mechanical switch separating brake, electric current is transferred to electrically-based electronic device
Cutout branch road, subsequently cutout branch road turn off, produce transient overvoltage, circuit energy is absorbed by energy absorption branch road, circuit
Electric current drops to zero.
During described breaker actuation, after electric current is transferred to cutout branch road, the power electronic devices of cutout branch road passes through millisecond
Turning off after level short circuit current, owing to power electronic devices cut-off current is limited in one's ability, short circuit current is crossed senior general and is caused turning off
Failure the most even causes cutout branch road to damage, and causes equipment and the huge economic loss of system.Therefore it is connected with power electronic devices
Drive circuit need the on state current of power electronic devices opening state is monitored, when electric current reach or close to device close
During the disconnected limit, corresponding measure taked by drive circuit, protects device.It addition, after breaker actuation terminates, cutout branch road is in pass
Disconnected state also tolerates busbar voltage, and power electronic devices passes through mA level leakage current, and too high leakage current can cause device heating
With aging, affect static state voltage equipoise, reduce breaker reliability.Therefore drive circuit needs power electronic devices off state
Off-state leakage current be monitored, thus the static heating of monitoring devices and degree of aging.Additionally, power electronic devices is at it
In his application, such as current transformer, need to consider the situation that on state current is excessive and off-state leakage current is too high equally, the most also reply is logical
State, the electric current of off-state are monitored, and when current anomaly, corresponding control method taked by drive circuit, protects power electronics device
Part and equipment.
The structure of existing power electronic devices drive circuit as in figure 2 it is shown, include power management module 1, trigger module 2,
Open module 3, turn off module 4, state monitoring module 5, feedback of status module 6, Logic control module 7, drive circuit
The power electronic devices 8 controlled, such as IGBT, IGCT etc..Wherein state monitoring module 5 mainly includes for monitoring power supply
Voltage sensor 5a, for monitoring the voltage sensor 5b of power electronic devices both end voltage, and monitor the biography of other performances
Sensor 5c (such as the temperature sensor etc. of monitoring driving plate temperature).Power management module 1 and other each modules of drive circuit
It is connected, other each modules are powered；Open module 3, shutoff module 4 is connected with power electronic devices 8, to electric power
Electronic device 8 performs to be switched on or off operation；State monitoring module 5 and power management module 1, power electronic devices 8 phase
Even, monitoring driving circuit power, power electronic devices state；Trigger module 2, open module 3, turn off module 4, state
Monitoring modular 5 and feedback of status module 6 are all connected with Logic control module 7, and trigger module is sent to after receiving superior instructions
Logic control module, Logic control module judges according to the status monitoring result of superior instructions, state monitoring module, logical
Cross to open module or turn off module and power electronic devices is switched on or off operation；Feedback of status module and logic control mould
Block is connected, and the on off state of power electronic devices is fed back to superior system.
The state monitoring module of existing power electronic devices drive circuit, owing to not having current sensor, it is impossible to directly measures logical
Cross on-state kA level electric current or the off-state mA level leakage current of power electronic devices.Existing power electronic devices drive circuit, makes
During turning on the voltage sensor monitoring being connected with power electronic devices, the voltage of collector and emitter, utilizes power electronics
Device voltage-current characteristic curve releases on state current indirectly.Owing to power electronic devices voltage-current characteristic curve is by device
Temperature impact is big and relevant with self diversity of power electronic devices, and the on state current error indirectly released is bigger.Existing
In the control method of power electronic devices drive circuit, for the overcurrent protection of on state current, existing power electronic devices drives
Circuit by measuring power electronic devices both end voltage and can utilize voltage-current characteristic curve indirectly to release on state current, from
And carry out overcurrent protection.On state current error owing to indirectly releasing is relatively big, and stream crossed by the drive circuit of existing power electronic devices
Protection degree of accuracy is low, seriously limits the use nargin of power electronic devices on state current.Aging journey for off-state leakage current
Degree monitoring, existing power electronic devices drive circuit does not has corresponding voltage, mA level current measurement and aging Preservation tactics.
Existing power electronic devices drive circuit, does not has electric current directly to measure sensor, flows based on indirectly measuring crossing of electric current
Protection degree of accuracy is low, it is impossible to monitoring devices degree of aging, therefore in other application such as dc circuit breaker and current transformer, and electric power
The on state current of electronic device and cut-off current use nargin to reduce, and the device that can not cause overcurrent turn-off function or aging heating
Damage reliably prevents and protects, and seriously reduces dc circuit breaker and the reliability of converter system entirety.
Summary of the invention
It is an object of the invention to the weak point for overcoming prior art, propose a kind of new power electronics based on current measurement
Component driving circuit and control method thereof, for driving the power electronic devices in mixed DC chopper, this drive circuit can
To overcome existing drive circuit can not directly measure the problem by power electronic devices electric current, use one or more the most commensurability
Electric current directly measured by the current sensor of journey, thus monitors power electronic devices duty, and feedback status information also performs phase
The control & protection strategy answered, improves power electronic devices and the reliability of mixed DC chopper.
A kind of based on current measurement the power electronic devices drive circuit that the present invention proposes, this circuit includes: power management mould
Block, trigger module, open module, turn off module, state monitoring module, feedback of status module, Logic control module；Its
Being characterised by, this state monitoring module, except including electric power monitor, voltage monitor, in place of state monitor, also includes electricity
Stream monitor and electric current directly measure sensor, for monitoring driving circuit power supply voltage, gate voltage, device two ends
Voltage, by the electric current of device；Wherein, the power management module of drive circuit is connected with other each modules, external circuit electricity
Source is converted to each voltage through the power management module of drive circuit, to other each module for power supply；Trigger module receives outside touching
Signal and input to Logic control module, performing during unfaulty conditions to be switched on or off order；Open module, turn off module
It is connected with power electronic devices, provides gate voltage or electric current for device, so that device is opened, turned off；Feedback of status mould
Block is connected with Logic control module, by optical fiber to the outside conducting off state of feedback device, break-over of device electric current, whether
Cross stream, the most aging serious information；Logic control module respectively with trigger module, open module, turn off module, state prison
Survey module is connected and matches with mixed DC chopper overall system control, according to the trigger module received, state monitoring module
Information, performer normally be switched on or off operation, monitoring driving circuit power supply voltage, gate voltage, device simultaneously
Part both end voltage, by the electric current of device, device is protected.
A kind of control method using above-mentioned drive circuit that the present invention proposes, it is characterised in that the method includes:
(1) in mixed DC chopper turn off process, electric current is transferred to power electronic devices from the through-flow branch road of mechanical switch
After the cutout branch road of series connection, the on state current of measurement is sent to Logic control module, Logic control module by state monitoring module
Judge overcurrent condition and report chopper overall system control by feedback of status module, if device on state current is excessive, i.e. line
Road short circuit current close to power electronic devices turn-off capacity, fault current exceed the power electronic devices turn-off capacity limit it
Before, turn off power electronic devices series arm, prevent device overcurrent turn-off function from damaging.
(2) after mixed DC chopper has turned off, power electronic devices series arm tolerance DC bus-bar voltage, string
Intrinsic with chopper respectively static voltage sharing of each power electronic devices of connection is in parallel, carries out static state voltage equipoise.State
The off-state leakage current of monitoring module monitors device, after this device creepage exceedes predetermined value, state monitoring module is by this electricity of measurement
The leakage current of power electronic device is sent to Logic control module, and reports disconnected by feedback of status module by this device aging situation
Road device overall system control, changes device when overhaul of line breaker next time or takes measures on customs clearance, reducing device and move at chopper
Damage hidden danger during work, improves chopper global reliability.If the aging quantity of devices in series branch road is more, then chopper
Hard stop is needed to change device.
What the present invention proposed is applied to power electronic devices drive circuit based on current measurement and control in mixed DC chopper
Method processed, its advantage is:
1, existing drive circuit can only measure on state current indirectly by measuring device on-state voltage drop, is affected greatly by junction temperature, and
Precision is low；The drive circuit of the present invention overcomes the defect of existing drive circuit, uses the electric current of one or more different range
Sensor (as TMR current sensor, GMR current sensor or other there is the current sensor etc. of respective performances) straight
Connect measurement on state current, measure frequency domain width, range is big, precision is high, low cost, volume are little；
2, the control method of the drive circuit of the present invention is by measuring on-state kA level electric current, and the situation that electric current is excessive is taked phase
The mistake flow control Preservation tactics answered, makes power electronic devices be protected, and reduces the risk of device failure；
3, the control method of the drive circuit of the present invention is by measuring the mA level leakage current of device off state, monitors device
Degree of aging, situation excessive for leakage current is fed back to the overall system control of mixed DC chopper, thus takes corresponding
Control & protection strategy, improves chopper global reliability.
4, this drive circuit can be applicable to various power electronic devices (such as IGBT, IGCT etc.), mainly for straight in mixing
Stream chopper application, is also applied for other power electronic devices application such as current transformer.
Accompanying drawing explanation
Fig. 1 is existing mixed DC breaker structure schematic diagram.
Fig. 2 is existing power electronic devices driving circuit structure schematic diagram.
In Fig. 2,1 is power management module, and 2 is trigger module, and 3 are on module, and 4 are off module, and 5 is state
Monitoring modular, including electric power monitor 5a, device both end voltage monitor 5b, other state detectors 5c, 6 is that state is anti-
Feedback module, 7 is Logic control module, and 8 is power electronic devices, including IGBT, IGCT etc..
Fig. 3 is the power electronic devices driving circuit structure schematic diagram of the present invention.
In Fig. 3,1 is power management module, and 2 is trigger module, and 3 are on module, and 4 are off module, and 5 is state
Monitoring modular, including electric power monitor 5a, device both end voltage monitor 5b, current monitoring 5d, other state-detection 5c
Directly measure sensor 5e with electric current, 6 is feedback of status module, and 7 is Logic control module, and 8 is power electronic devices, bag
Including IGBT, IGCT etc., 9 is the magnet ring of shielding external magnetic field interference.
Detailed description of the invention
Power electronic devices drive circuit based on current measurement and control method that the present invention proposes combine drawings and Examples
Illustrate that its structure, operation principle and control method are as follows:
The structure of present invention power electronic devices based on current measurement drive circuit is as it is shown on figure 3, this circuit includes: power supply
Management module 1, trigger module 2, open module 3, turn off module 4, state monitoring module 5, feedback of status module 6,
Logic control module 7；The present invention thes improvement is that, state monitoring module is except including electric power monitor 5a, device two ends
Voltage monitor 5b, in place of other state detectors 5c, also includes the current monitor 5d being connected with power electronic devices 8
Sensor 5e is directly measured with electric current；Wherein, the power management module of drive circuit is connected with other each modules, external circuit
Power supply is converted to each voltage through the power management module of drive circuit, to other each module for power supply；Outside trigger module 2 receives
Portion triggers signal and inputs to Logic control module, performs to be switched on or off order during unfaulty conditions；Open module 3, close
Disconnected module 4 is connected with power electronic devices 8, according to power electronic devices type (as voltage-controlled type IGBT, flow control type
IGCT etc.) provide gate voltage or electric current for device, so that device is opened, turned off；Feedback of status module 6 and logic control
Molding block 7 is connected, by optical fiber to the outside conducting off state of feedback device, break-over of device electric current, whether cross and flow, be
The no aging information such as seriously；Logic control module 7 respectively with trigger module, open module, turn off module, status monitoring mould
Block is connected (matching with mixed DC chopper overall system control), according to the trigger module received, state monitoring module
Information, performer normally be switched on or off operation, device is protected simultaneously；Current monitoring in state monitoring modular
Device 5d and electric current directly measure sensor 5e, for monitoring driving circuit power supply voltage, gate voltage, device two ends
Voltage, by the electric current etc. of device.
The device specific implementation and the function declaration that improve in the drive circuit of the present invention are as follows:
State monitoring module uses the current sensor of one or more different range (if high-performance is based on tunnel magneto-resistance effect
TMR current sensor, based on giant magnetoresistance effect GMR current sensor or other there is the current sensor etc. of respective performances)
Directly measure the electric current by power electronic devices, if single current sensor cannot meet total current required precision, can use
The current sensor combination of multiple different ranges, measures the big electric current of on-state kA level and off-state mA level leakage current respectively.Total survey
Amount range covering mA level, to kA level, can take into account the mA level leakage current of device off state and the kA level on-state of opening state
Big electric current, measures frequency domain from direct current to MHz magnitude；Electric current directly measure sensor meet wide range, in high precision, wideband
The features such as band, small size, low cost, non-intrusion type.
Logic control module is additionally operable to the protection to power electronic devices current anomaly situation, and device opening state is crossed stream feelings
The degree of aging of condition and off-state leakage current is monitored, by feedback of status module by current measurement result, whether cross stream,
The information such as the most aging feeds back to the overall system control of mixed DC chopper, overall system control and series power electronics device
Each drive circuit Logic control module of part combines, and is controlled each power electronic devices of chopper and series connection,
Turn off failed risk in order to reduce device failure or chopper, improve chopper global reliability.
In addition the drive circuit of the present invention may also include the magnet ring 9 being arranged on power electronic devices shell periphery, at external magnetic field
Disturb in bigger environment, in order to shield the external magnetic field interference to power electronic devices.Magnet ring 9 uses and power electronics device
The conventional products that part size matches.
The control method of the drive circuit of the present invention is:
(1) in mixed DC chopper turn off process, electric current is transferred to power electronic devices from the through-flow branch road of mechanical switch
After the cutout branch road of series connection, the on state current of measurement is sent to Logic control module, Logic control module by state monitoring module
Judge overcurrent condition and report chopper overall system control by feedback of status module, if device on state current is excessive, i.e. line
Road short circuit current close to power electronic devices turn-off capacity, fault current exceed the power electronic devices turn-off capacity limit it
Before, turn off power electronic devices series arm, prevent device overcurrent turn-off function from damaging.
(2) after mixed DC chopper has turned off, power electronic devices series arm tolerance DC bus-bar voltage, string
Intrinsic with chopper respectively static voltage sharing of each power electronic devices of connection is in parallel, carries out static state voltage equipoise.State
(if indivedual power electronic devices is aging substantially, then leakage current increases the off-state leakage current of monitoring module monitors device, generally leaks
Electric current increases to tens milliamperes or milliampere up to a hundred from several milliamperes), this device creepage exceedes predetermined value (i.e. device trouble free service
Time the maximum leakage current born) after, the leakage current measuring this power electronic devices is sent to logic control by state monitoring module
Molding block, and by feedback of status module, this device aging situation is reported chopper overall system control, at chopper next time
Change device during maintenance or take measures on customs clearance, reducing device damage hidden danger during breaker actuation, improving chopper
Global reliability.If the aging quantity of devices in series branch road is more, then chopper needs hard stop to change device.
The drive circuit of the present invention also apply be applicable to, in other application such as the current transformer of power electronic devices, use driving of the present invention
Galvanic electricity road, is monitored device on state current and off-state leakage current, and when current anomaly, drive circuit controls system with overall
Conjunction under unified central planning, takes corresponding control method, protection power electronic devices and equipment.
Above-mentioned control method all uses conventional programming techniques to be compiled into control program and is stored in advance in the corresponding module of drive circuit
In.
Claims (5)
1. a power electronic devices drive circuit based on current measurement, this circuit includes: power management module, triggers
Module, opens module, turns off module, state monitoring module, feedback of status module, Logic control module；It is characterized in that,
This state monitoring module except including electric power monitor, voltage monitor, in place of state monitor, also include current monitor and
Electric current directly measures sensor, for monitoring driving circuit power supply voltage, gate voltage, device both end voltage, passes through
The electric current of device；Wherein, the power management module of drive circuit is connected with other each modules, and external circuit power supply is through driving electricity
The power management module on road is converted to each voltage, to other each module for power supply；Trigger module reception outer triggering signal is the most defeated
Enter to Logic control module, perform during unfaulty conditions to be switched on or off order；Open module, turn off module and power electronics
Device is connected, and provides gate voltage or electric current for device, so that device is opened, turned off；Feedback of status module and logic control
Molding block is connected, by optical fiber to the outside conducting off state of feedback device, break-over of device electric current, whether cross stream, whether
Aging serious information；Logic control module respectively with trigger module, open module, turn off module, state monitoring module and be connected
Match with mixed DC chopper overall system control, according to the trigger module received, the information of state monitoring module, hold
Row device normally be switched on or off operation, simultaneously monitoring driving circuit power supply voltage, gate voltage, device both end voltage,
By the electric current of device, device is protected.
2. drive circuit as claimed in claim 1, it is characterised in that described current monitor and electric current directly measure biography
Sensor use multiple different TMR current sensors of range, GMR current sensor or other there is the electric current of respective performances
Sensor is combined, and leaks electricity in order to directly to measure the big electric current of on-state kA level by power electronic devices and off-state mA level
Stream, measures frequency domain from direct current to MHz magnitude.
3. drive circuit as claimed in claim 1, it is characterised in that described Logic control module is additionally operable to electric power electricity
The protection of sub-device current abnormal conditions, enters the overcurrent condition of device opening state and the degree of aging of off-state leakage current
Row monitoring, by feedback of status module by current measurement result, whether cross stream, the information such as the most aging feeds back to mixed DC
Each drive circuit Logic control module of the overall system control of chopper, overall system control and series power electronic device
Combine, each power electronic devices of chopper and series connection is controlled, reduce device failure or chopper turns off unsuccessfully
Risk, improve chopper global reliability.
4. drive circuit as described in claim 1,2 or 3, it is characterised in that described drive circuit also includes being arranged on electricity
The magnet ring of power electric-device housing periphery, in order to shield the external magnetic field interference to power electronic devices.
5. the control method using drive circuit as claimed in claim 1, it is characterised in that the method includes:
(1) in mixed DC chopper turn off process, electric current is transferred to power electronic devices from the through-flow branch road of mechanical switch
After the cutout branch road of series connection, the on state current of measurement is sent to Logic control module, Logic control module by state monitoring module
Judge overcurrent condition and report chopper overall system control by feedback of status module, if device on state current is excessive, i.e. line
Road short circuit current close to power electronic devices turn-off capacity, fault current exceed the power electronic devices turn-off capacity limit it
Before, turn off power electronic devices series arm, prevent device overcurrent turn-off function from damaging.
(2) after mixed DC chopper has turned off, power electronic devices series arm tolerance DC bus-bar voltage, string
Intrinsic with chopper respectively static voltage sharing of each power electronic devices of connection is in parallel, carries out static state voltage equipoise.State
The off-state leakage current of monitoring module monitors device, after this device creepage exceedes predetermined value, state monitoring module is by this electricity of measurement
The leakage current of power electronic device is sent to Logic control module, and reports disconnected by feedback of status module by this device aging situation
Road device overall system control, changes device when overhaul of line breaker next time or takes measures on customs clearance, reducing device and move at chopper
Damage hidden danger during work, improves chopper global reliability.If the aging quantity of devices in series branch road is more, then chopper
Hard stop is needed to change device.
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| CN201610284057.8A CN105896938B (en) | 2016-04-29 | 2016-04-29 | A kind of power electronic devices driving circuit and its control method based on current measurement |
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| CN108092491A (en) * | 2018-01-02 | 2018-05-29 | 清华大学 | Electric power management circuit applied to GCT device gate-drives |
| CN109245034A (en) * | 2018-09-12 | 2019-01-18 | 山东电力设备有限公司 | Mechanical high-voltage dc circuit breaker Control and protection system and its control method |
| CN109755924A (en) * | 2017-11-08 | 2019-05-14 | 清华大学 | A kind of circuit topological structure of hybrid dc circuit breaker and direct current transmission and distribution system |
| CN110702965A (en) * | 2019-10-15 | 2020-01-17 | 清华大学 | Cable state monitoring sensor device |
| CN111403174A (en) * | 2020-03-25 | 2020-07-10 | 东风汽车集团有限公司 | Thin film capacitor integrating EMC (electro magnetic compatibility) and discharge functions and motor controller thereof |
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| CN111403174B (en) * | 2020-03-25 | 2021-03-09 | 东风汽车集团有限公司 | Thin film capacitor integrating EMC (electro magnetic compatibility) and discharge functions and motor controller thereof |
| CN111900136A (en) * | 2020-07-22 | 2020-11-06 | 清华大学 | Turn-off thyristor device with split gate drive |
| CN115149939A (en) * | 2022-09-01 | 2022-10-04 | 清华大学 | Discrete high-voltage electronic device and method |
| CN115149939B (en) * | 2022-09-01 | 2023-01-06 | 清华大学 | Discrete high-voltage electronic device and method |
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