CN109638769A - A kind of power electronics direct current protecting device of two-phase full-bridge topology - Google Patents
A kind of power electronics direct current protecting device of two-phase full-bridge topology Download PDFInfo
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- CN109638769A CN109638769A CN201910000030.5A CN201910000030A CN109638769A CN 109638769 A CN109638769 A CN 109638769A CN 201910000030 A CN201910000030 A CN 201910000030A CN 109638769 A CN109638769 A CN 109638769A
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- Prior art keywords
- direct current
- electronic devices
- power electronic
- power
- phase full
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
- H02H3/087—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current for dc applications
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Abstract
The invention discloses a kind of power electronics direct current protecting devices of two-phase full-bridge topology; the protection problem being able to solve in direct current system; using power electronic devices as solid-state switch; direct current reactor limitation current changing rate is sealed in the power electronics direct current protecting device circuit of two-phase full-bridge topology, and anti-paralleled diode afterflow in switch OFF of electric and electronic power component is utilized in major loop；The present invention can be set on the primary circuit of direct current power system, play the role of through-flow, isolation and protection.
Description
Technical field
The invention belongs to technical field of electric power, and in particular to a kind of power electronics direct current protecting dress of two-phase full-bridge topology
It sets, the protection suitable for direct current system.
Background technique
As electric propulsion of warship power is constantly promoted, ship electric network short circuit current level is improved rapidly, existing mother
Protective device such as oily bus connection switch, air bus connection switch, movement speed is slow, and arc extinguishing is difficult, and rupturing capacity is restricted, it is difficult to
Meet the breaking capacity requirement that increased dramatically.
Power electronics direct current protecting device, as contactless load control unit, overcomes machinery using power electronic devices
The shortcomings that formula mother screen, will not generate electric arc in system turn off process, extend switch life, avoid causing during switch on-off
Switching overvoltage, the dielectric level of equipment is greatly reduced, since misoperation causes equipment damage that can also greatly reduce.
Simultaneously as the make-and-break time of power electronic devices is in microsecond even nanosecond, therefore power electronics direct current protecting
The movement speed of device greatly improves.The power electronics direct current protecting device can greatly improve naval vessel direct current networking combined power
The reliability and safety of system.
Summary of the invention
The purpose of the present invention is designing a kind of power electronics direct current protecting device of two-phase full-bridge topology, power electronics is utilized
Movement speed, the reliability, safety of technology raising dc switch.
The technical solution adopted by the present invention to solve the technical problems is: a kind of power electronics direct current of two-phase full-bridge topology
Protective device, including being located at two positive and negative direct current busbars of the left and right sides and being connected between DC master row positive and negative anodes
Support Capacitor C1 and C2, two groups of two-phase full bridge power components and two direct currents being connected between two two-phase full bridge power components
Reactor, direct current reactor between DC master row positive and negative anodes with the current changing rate di/dt of limit circuit, one group of left side
Two-phase full bridge power component is made of power electronic devices T1~T4, concatenated power electronic devices T1, T2 and concatenated electric power
Electronic device T3, T4 are in parallel with Support Capacitor C1, and another group of two-phase full bridge power component on right side is by power electronic devices T5
~T8 composition, concatenated power electronic devices T5, T6 and concatenated power electronic devices T7, T8 are in parallel with Support Capacitor C2,
One direct current reactor one end be connected to the other end between power electronic devices T3, T4 be connected to power electronic devices T5, T6 it
Between, a direct current reactor one end is connected to the other end between power electronic devices T1, T2 and is connected to power electronic devices T7, T8
Between, the upper inverse parallel of power electronic devices T1~T8 has diode D1~D8, and shutdown moment power electronic devices T1~
T8 whole locking pulse, the electric current on direct current reactor is by diode D1~D8, direct current reactor and Support Capacitor C1 and C2
The circuit afterflow of composition, normal through-flow permission electric current Two-phase flow.
It further, can when carrying out closed procedure in the biggish situation of voltage phase difference of the device two sides DC master row
Precharge of the unilateral bus to another side bus is realized by the chopper that power electronic devices and direct current reactor are constituted.
Further, the power electronic devices is switching tube.
It further, further include control system；The control system passes through the electric current and two on measurement direct current reactor
The voltage of side Support Capacitor C1 and C2, work as generation: a, and electric current is more than limits value；B, the variation road of electric current are more than limits value；C, electricity
Pressing pressure difference is more than limits value；For the moment, protective device movement disconnects two sides connection to above-mentioned three kinds of situations.
The beneficial effect comprise that:
The present invention is used as solid-state switch using power electronic devices, and direct current reactor limitation current changing rate is sealed in circuit, is led
Anti-paralleled diode afterflow in switch OFF that electric and electronic power component is utilized in circuit, can be set to direct current power system
On the primary circuit of system, play the role of through-flow, isolation and protection；It is realized by the chopper that electronic power switch is constituted unilateral
Precharge of the bus to another side bus, saves pre-charge resistance and contactor circuit；It judges the judgement item of short trouble
Part is that the exception of any one condition in the change rate of current peak, the pressure difference of two sides voltage and electric current will lead to the protective device
Movement.
Detailed description of the invention
Fig. 1 is the topological diagram of apparatus of the present invention.
Fig. 2 is apparatus of the present invention electric current side flow circuits from left to right；
Fig. 3 is that apparatus of the present invention electric current is turned left side flow circuits from the right side；
Fig. 4 is the continuous current circuit that apparatus of the present invention electric current original direction is from left to right side；
Fig. 5 is the continuous current circuit that apparatus of the present invention electric current original direction is side from right to left.
Specific embodiment
The present invention is described in more detail with reference to the accompanying drawing.
Shown in referring to Fig.1, the present invention discloses a kind of power electronics direct current protecting device of two-phase full-bridge topology, the device by
Positioned at the positive and negative direct current busbar of the left and right sides, Support Capacitor C1 and C2, direct current reactor, two groups of two-phase full bridge power components and its
Control system is constituted.Two direct current reactors are connected between two two-phase full bridge power components, one group of two-phase full-bridge function in left side
Rate component is made of power electronic devices T1~T4, concatenated power electronic devices T1, T2 and concatenated power electronic devices T3,
T4 is in parallel with Support Capacitor C1, and another group of two-phase full bridge power component on right side is made of power electronic devices T5~T8, string
Power electronic devices T5, T6 of connection and concatenated power electronic devices T7, T8 are in parallel with Support Capacitor C2, a direct current reactance
Device one end is connected to the other end between power electronic devices T3, T4 and is connected between power electronic devices T5, T6, a direct current
Anti- device one end is connected to the other end between power electronic devices T1, T2 and is connected between power electronic devices T7, T8, the electricity
The upper inverse parallel of power electronic device T1~T8 has diode D1~D8, shutdown moment power electronic devices T1~T8 all to block arteries and veins
It rushes, the electric current on direct current reactor is continuous by the circuit that diode D1~D8, direct current reactor and Support Capacitor C1 and C2 are constituted
Stream, normal through-flow permission electric current Two-phase flow.
When working normally protective device gate-dividing state of the present invention, power electronic devices T1~T8 all disjunctions, current path quilt
Partition, the isolation of two sides DC master row；When working normally protective device "on" position of the present invention, T2, T3, T5, T8 closure, T1, T4,
T6, T7 disjunction, current path are shown in Fig. 2 and Fig. 3, and Fig. 2 is that electric current is turned right flow circuits from left side, and Fig. 3 is electric current from the right side
Side is turned left side flow circuits；When electrification is closed a floodgate, if two sides DC master row voltage phase difference is larger, protective device of the present invention will pass through
The chopper of power electronic devices and direct current reactor composition carries out precharge of the unilateral bus to other side bus；About pre-
Charge function: because being related to the normal work of electronic power switch, if not being pre-charged, the voltage difference of two side bus
If too high, directly close a floodgate to be equivalent to applies a voltage to capacitor charging on the bus capacitor of opposite side, has one very big
Dash current；When protection act or electrification disjunction, electric current is by circuit afterflow shown in Fig. 4 and Fig. 5.Fig. 4 is electric current original side
To being continuous current circuit from left side to right side, Fig. 5 is that electric current original direction is continuous current circuit from right side to left side.
The voltage of electric current and capacitor C1 and C2 supported on both sides in the middle part of protector measuring of the present invention in direct current reactance, works as hair
When raw following situations, protective device movement disconnects two sides connection:
A, electric current are more than limits value；B, the variation road of electric current are more than limits value；C, voltage difference are more than limits value.
The above-described embodiments merely illustrate the principles and effects of the present invention, and the embodiment that part uses, for
For those skilled in the art, without departing from the concept of the premise of the invention, can also make it is several deformation and
It improves, these are all within the scope of protection of the present invention.
Claims (4)
1. a kind of power electronics direct current protecting device of two-phase full-bridge topology, it is characterised in that: including two positive and negative direct current busbars
And it is connected to Support Capacitor C1 and C2 between DC master row positive and negative anodes, two groups of two-phase full bridge power components and connection
Two direct current reactors between two two-phase full bridge power components, direct current reactor is between DC master row positive and negative anodes with limit
The current changing rate di/dt in circuit processed, one group of two-phase full bridge power component are made of power electronic devices T1~T4, concatenated electricity
Power electronic device T1, T2 and concatenated power electronic devices T3, T4 are in parallel with Support Capacitor C1, another group of two-phase full bridge power
Component is made of power electronic devices T5~T8, concatenated power electronic devices T5, T6 and concatenated power electronic devices T7, T8
In parallel with Support Capacitor C2, a direct current reactor one end is connected to the other end between power electronic devices T3, T4 and is connected to
Between power electronic devices T5, T6, a direct current reactor one end is connected to the other end between power electronic devices T1, T2 and connects
Between power electronic devices T7, T8, the upper inverse parallel of power electronic devices T1~T8 has diode D1~D8, when shutdown
Power electronic devices T1~T8 whole locking pulse is carved, the electric current on direct current reactor passes through diode D1~D8, direct current reactance
The circuit afterflow that device and Support Capacitor C1 and C2 are constituted, normal through-flow permission electric current Two-phase flow.
2. a kind of power electronics direct current protecting device of two-phase full-bridge topology according to claim 1, which is characterized in that institute
The power electronic devices and direct current reactor stated constitute chopper, carry out in the biggish situation of two sides DC master row voltage phase difference
When closed procedure, precharge of the unilateral busbar to other side busbar is realized.
3. a kind of power electronics direct current protecting device of two-phase full-bridge topology according to claim 2, which is characterized in that institute
The power electronic devices stated is switching tube.
4. a kind of power electronics direct current protecting device of two-phase full-bridge topology according to claim 3, which is characterized in that also
Including control system；The electricity that the control system passes through electric current and capacitor C1 and C2 supported on both sides on measurement direct current reactor
Pressure, works as generation: a, and electric current is more than limits value；B, the variation road of electric current are more than limits value；C, voltage difference are more than limits value；It is above-mentioned
For the moment, protective device movement disconnects two sides connection to three kinds of situations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910000030.5A CN109638769A (en) | 2019-01-01 | 2019-01-01 | A kind of power electronics direct current protecting device of two-phase full-bridge topology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910000030.5A CN109638769A (en) | 2019-01-01 | 2019-01-01 | A kind of power electronics direct current protecting device of two-phase full-bridge topology |
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| Publication Number | Publication Date |
|---|---|
| CN109638769A true CN109638769A (en) | 2019-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910000030.5A Pending CN109638769A (en) | 2019-01-01 | 2019-01-01 | A kind of power electronics direct current protecting device of two-phase full-bridge topology |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103155393A (en) * | 2010-10-13 | 2013-06-12 | 三菱电机株式会社 | Three-phase ac to dc converter and air conditioning apparatus using three-phase ac to dc converter |
| CN106451406A (en) * | 2016-09-22 | 2017-02-22 | 北京交通大学 | Flexible switch device for connecting two DC power distribution systems |
| CN207382193U (en) * | 2017-11-21 | 2018-05-18 | 湘潭电机股份有限公司 | A kind of non-isolated step-up/step-down dc-dc converter of multichannel phase shift |
-
2019
- 2019-01-01 CN CN201910000030.5A patent/CN109638769A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103155393A (en) * | 2010-10-13 | 2013-06-12 | 三菱电机株式会社 | Three-phase ac to dc converter and air conditioning apparatus using three-phase ac to dc converter |
| CN106451406A (en) * | 2016-09-22 | 2017-02-22 | 北京交通大学 | Flexible switch device for connecting two DC power distribution systems |
| CN207382193U (en) * | 2017-11-21 | 2018-05-18 | 湘潭电机股份有限公司 | A kind of non-isolated step-up/step-down dc-dc converter of multichannel phase shift |
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Application publication date: 20190416 |