CN111952991B - Master-slave driving device series-connection type direct current circuit breaker and control method thereof - Google Patents
Master-slave driving device series-connection type direct current circuit breaker and control method thereof Download PDFInfo
- Publication number
- CN111952991B CN111952991B CN202010803768.8A CN202010803768A CN111952991B CN 111952991 B CN111952991 B CN 111952991B CN 202010803768 A CN202010803768 A CN 202010803768A CN 111952991 B CN111952991 B CN 111952991B
- Authority
- CN
- China
- Prior art keywords
- driving
- terminal
- oscillation suppression
- module
- parallel
- 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.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/268—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured for dc systems
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electronic Switches (AREA)
Abstract
The invention relates to a master-slave driving device serial direct current breaker, belonging to the technical field of master-slave driving device serial direct current breakers; the technical problem to be solved is as follows: the improvement of a master-slave driving device series direct current breaker circuit structure with an oscillation suppression function and a control method thereof is provided; the technical scheme for solving the technical problem is as follows: the direct-current circuit breaker comprises a main breaking module and a power end oscillation suppression module, wherein a positive power terminal P of the direct-current circuit breaker is connected with the power end oscillation suppression module, a negative power terminal N of the direct-current circuit breaker is connected with the main breaking module, a driving end oscillation suppression module is further arranged in the main breaking module, and an output end of the power end oscillation suppression module is connected with a negative power terminal N of the direct-current circuit breaker after being connected with a driving terminal of the driving end oscillation suppression module in parallel; at least two cascade devices are arranged between the drive end oscillation suppression module and a negative power terminal N of the direct current breaker; the invention is applied to the direct current circuit breaker.
Description
Technical Field
The invention discloses a master-slave driving device serial direct current circuit breaker, and belongs to the technical field of master-slave driving device serial direct current circuit breakers.
Background
The direct current circuit breaker is used as an overcurrent and short-circuit protection device in an alternating current and direct current power transmission and distribution system, and provides guarantee for safe and reliable work of a direct current power supply system. Unlike the current zero crossing points naturally existing in an alternating current transmission system, the traditional mechanical circuit breaker can realize arc extinguishing operation at the zero crossing points, and the direct current system does not have the natural zero crossing points, which brings a difficult problem to the design of an arc extinguishing device of the mechanical circuit breaker and needs to increase the current zero crossing points of an oscillating circuit. Compared with a mechanical breaker, the solid-state direct-current breaker adopting the power semiconductor device and the mechanical-solid-state hybrid direct-current breaker break short-circuit current by utilizing the switching action of the power semiconductor device, and energy absorption devices such as an external lightning arrester absorb short-circuit energy stored on a current-limiting reactance in the short-circuit process, so that the direct-current short-circuit current can be quickly broken by the excellent characteristic, and the direct-current system can be quickly and reliably protected.
The voltage resistance of the conventional commercial power semiconductor device is low, the requirement of a direct current transmission network is difficult to meet, and the voltage resistance grade of the circuit breaker needs to be improved by adopting a mode of connecting the devices in series. In recent years, researchers propose that the complexity of a driving control system is reduced by driving a series device by using a capacitive coupling principle, the topology can carry out driving control on a driven device by using terminal voltage change of a driving device, and dynamic voltage balance of the series device is realized by using a compensation capacitor and a buffer circuit.
In the solid-state direct-current circuit breaker, after the direct-current short-circuit current is cut off, an oscillation phenomenon can occur on the end voltage of the circuit breaker, and the oscillation phenomenon can cause the driving signal of the driven device to oscillate in the capacitive coupling series driving topology, so that the driven device is conducted, and the dynamic voltage of the series device is unbalanced. In order to solve the problem of oscillation of the coupled series drive topology in the application of the circuit breaker, it is necessary to provide a master-slave drive device series direct current circuit breaker topology structure with high reliability and low cost, and the master-slave drive device series direct current circuit breaker topology structure has an oscillation suppression function.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to solve the technical problems that: the circuit structure of the master-slave driving device series direct current breaker with the oscillation suppression function and the improvement of the control method thereof are provided.
In order to solve the technical problems, the invention adopts the technical scheme that: a master-slave driving device series connection type direct current breaker comprises a master breaking module and a power end oscillation suppression module, wherein a positive power terminal P of the direct current breaker is connected with the power end oscillation suppression module, a negative power terminal N of the direct current breaker is connected with the master breaking module, a driving end oscillation suppression module is further arranged in the master breaking module, and an output end of the power end oscillation suppression module is connected with a driving terminal of the driving end oscillation suppression module in parallel and then connected with a negative power terminal N of the direct current breaker;
at least two cascade devices are further arranged between the drive end oscillation suppression module and a negative power terminal N of the direct current circuit breaker.
The cascade device is specifically two power semiconductor devices connected in series: the driving device M1 and the driven device M2 are used as short-circuit current breaking elements of the circuit breaker, wherein the driving end of the driven device M2 is connected with the driving terminal of the driving-end oscillation suppression module;
the control ends of the driving device M1 and the driven device M2 are connected with a controller through leads, control signals are provided by the controller, the positive and negative level amplitudes of driving voltage are adjusted according to different used devices, and the driving control of the two series devices is realized through a single control signal.
The drive end oscillation suppression module is specifically a pi-type network circuit consisting of a voltage stabilizing diode Zd, a damping resistor Rg and a damping capacitor Cd;
the drive terminal of the drive end oscillation suppression module is G1 and G2 respectively, the source terminal of the drive end oscillation suppression module is S1 and S2 respectively, and the circuit structure of the drive end oscillation suppression module is as follows:
drive terminal G1 passes through the wire and links to each other with damping resistance Rg ' S one end behind the negative pole of zener diode Zd, damping resistance Rg ' S the other end and links to each other with drive terminal G2 behind the one end of damping electric capacity Cd, source terminal S1 ' S the wire that passes through connects in proper order and links to each other with source terminal S2 behind anodal, the other end of damping electric capacity Cd of zener diode Zd.
The power end oscillation suppression module is specifically a network circuit consisting of a high-voltage diode Df and a damping resistor Rd;
the positive terminal of the power end oscillation suppression module is P1, the negative terminal is N1, and the circuit structure of the power end oscillation suppression module is as follows:
the anode of the high-voltage diode Df is connected with one end of the damping resistor Rd in parallel and then is connected with the anode terminal P1, and the cathode of the high-voltage diode Df is connected with the other end of the damping resistor Rd in parallel and then is connected with the cathode terminal N1.
The circuit structure of the main breaking module is as follows: the negative terminal N1 is respectively connected with the anode of a diode Ds2 in parallel, one end of a resistor Rs2, the drain of a driven device M2 and one end of a resistor R2 in parallel, one end of an adjustable resistor Var2 is connected with one end of a capacitor C2 in parallel, the cathode of the diode Ds2 is connected with one end of the capacitor Cs2 in parallel, the other end of the capacitor Cs2 is respectively connected with the source of the driven device M2 in parallel, the anode of the diode Ds1 and one end of the resistor Rs1 in parallel and then connected with the drain of a driving device M1, the cathode of the diode Ds1 is connected with the other end of the resistor Rs1 in parallel and then connected with one end of the capacitor Cs1, and the other end of the capacitor Cs1 is respectively connected with the source of the driving device M1 in parallel, one end of the resistor R1, one end of the capacitor C1, one end of the adjustable resistor Var1 and the other end of the capacitor C2 in parallel and then connected with the negative power terminal N of the direct current breaker;
the driving terminal G2 of the driving end oscillation suppression module is connected with the driving terminal of the driven device M2;
a source terminal S2 of the drive-end oscillation suppression module is connected with a source electrode of a driven device M2;
a driving terminal G1 of the driving end oscillation suppression module is respectively connected with the other end of the resistor R1, the other end of the capacitor C1 and the other end of the adjustable resistor Var1 in parallel and then connected with the cathode of the diode D1;
the anode of the diode D1 is connected with the driving terminal of the active device M1;
and a source terminal S1 of the drive-end oscillation suppression module is connected with the other end of the resistor R2 in parallel and then connected with the other end of the adjustable resistor Var 2.
A master-slave drive device series connection type direct current breaker control method comprises the following steps:
the method comprises the following steps: when the line or the equipment is in a normal working state, the control unit sends out a high-level signal to control the two series-connected cascade devices in the main breaking module to be kept conducted, and the load current flows through the diode in the power end oscillation suppression module and the conducting channel of the two series-connected cascade devices in the main breaking module;
step two: when the system detects that a short-circuit fault occurs, the driving levels at two ends of a control terminal in the main breaking module are changed from high to low, and then the main breaking module executes short-circuit current breaking operation;
step three: when the short-circuit energy is completely absorbed, the two series cascade devices are in an off state, and the circuit breaker is in an off state;
step four: when the fault is relieved, the driving levels at two ends of a control terminal in the main breaking module are changed from low to high, the driving device M1 is controlled to be switched on, the driven device M2 is controlled to enter a conducting state through a capacitive coupling principle, the load current flows through a diode in the power end oscillation suppression module and a conducting channel of two series-connected cascade devices in the main breaking module, and at the moment, the direct-current circuit breaker is in a normal load current carrying and flowing state.
Compared with the prior art, the invention has the beneficial effects that: the invention provides a master-slave driving device series direct current breaker with oscillation suppression function, which mainly comprises two power semiconductor devices which are connected in series to serve as a main breaking element of short-circuit current to break the short-circuit current, two power semiconductor devices, a plurality of peripheral resistor and capacitor passive elements, and a diode element to form a main breaking module, wherein the two series power devices in the unit adopt master-slave driving type control circuits, and the series device driving and voltage balance control functions can be realized only by single independent external driving; the main breaking module comprises a driving oscillation suppression circuit unit, and the driving oscillation suppression unit and the power end oscillation suppression module act together, so that the influence of the circuit oscillation phenomenon on the driving and driven control in a short-circuit current breaking stage can be avoided, and the misconduction of a driven device is prevented, and further the voltage unbalance of a series device and the oscillation of end voltage are caused; in the topological structure of the direct current breaker, the power device in the main breaking module is realized by the MOSFET or the IGBT, and the control of the two cascade devices can be realized only by the control unit providing a pair of driving signals.
The circuit breaker provided by the invention has a simple topological structure, can realize the master-slave drive control of a series device by only a small amount of passive elements, greatly reduces the control scheme, simultaneously inhibits the oscillation phenomenon of the master-slave drive after the short-circuit current is divided under the combined action of the power end oscillation inhibition unit and the control end oscillation inhibition unit, improves the circuit stability of the circuit breaker in the short-circuit current dividing process under different voltages and current levels on the premise of not influencing the short-circuit current dividing capacity of the circuit breaker, and provides a simple and reliable solution for the protection of a direct current system.
Drawings
The invention is further described below with reference to the accompanying drawings:
fig. 1 is a schematic circuit diagram of a dc circuit breaker according to the present invention;
in the figure: 1 is a main breaking module, 2 is a power end oscillation suppression module, 3 is a driving end oscillation suppression module, and 4 is a cascade device;
in the component label:
p and N are power terminals of the direct current circuit breaker, wherein P is a positive power terminal, and N is a negative power single;
g and S are control terminals of the direct current circuit breaker, wherein G is a gate driving end of the control terminal, and S is the ground of the control terminal;
m1 and M2 are series power semiconductor devices in a main breaking module of the direct-current circuit breaker;
rs1, rs2 are resistors in the RCD snubber circuit of the devices M1, M2;
cs1 and Cs2 are capacitors in RCD buffer circuits of the devices M1 and M2;
ds1, ds2 are diodes in the RCD buffer circuit of the devices M1, M2;
r1 and R2 are static voltage-sharing resistors;
var1 and Var2 are piezoresistors for absorbing short-circuit energy;
the capacitors C1 and C2 are a driving capacitor and a dynamic voltage-sharing capacitor of the series power semiconductor device;
d1 is a diode providing a stable driving voltage for the device M2 in the on state;
terminals d1, s1 are the drain and source, respectively, of device M1;
terminals d2, s2 are the drain and source, respectively, of device M2;
terminals g1, g2 are the drive terminals of devices M1 and M2, respectively;
df is a forward diode in the power end oscillation suppression module;
rd is a damping resistor in the power end oscillation suppression module;
zd is a gate pole protection voltage stabilizing diode in the drive end oscillation suppression circuit unit;
cd is an oscillation suppression capacitor in the drive end oscillation suppression circuit unit;
and Rg is a gate driving resistor in the driving end oscillation suppression circuit unit.
Detailed Description
As shown in fig. 1, the present invention provides a master-slave driving device series dc circuit breaker with oscillation suppression function, in the dc circuit breaker, a power terminal P of the dc circuit breaker is connected to a P1 terminal in a power end oscillation suppression short-circuit unit, and an N1 terminal in a power end oscillation suppression module is connected to a device M2 in a main breaking module. In the main breaking module of the power end oscillation suppression module, a device M2 is connected with a device M1. The device M1 is connected to the power terminal N of the dc breaker.
In the main breaking module, the devices M1 and M2 are connected in series, i.e. the drain of M1 is connected to the source of M2. The power semiconductor devices M1 and M2 are one of a silicon carbide MOSFET and an IGBT, and the device M1 realizes replacement of both devices through terminals d1 and s1, and the device M2 realizes replacement of both devices through terminals d2 and s 2.
In the main breaking module, rs1 is connected in series with Cs1 as a snubber circuit, and then connected in parallel with the device M1. That is, the left end of Rs1 is connected to d1 of device M1, the right end of Cs1 is connected to s1 of device M1, and the right end of Rs1 is connected to the left end of Cs 1. Diode Ds1 is connected with Rs1 in parallel, namely the left end of Ds1 is connected with the left end of Rs1, and the right end of Ds1 is connected with the right end of Rs 1.
In the main breaking module, rs2 is connected in series with Cs2 as a snubber circuit, and then connected in parallel with the device M2. That is, the left end of Rs2 is connected to d1 of device M2, the right end of Cs2 is connected to s2 of device M2, and the right end of Rs2 is connected to the left end of Cs 2. Diode Ds2 is connected with Rs2 in parallel, namely the left end of Ds2 is connected with the left end of Rs2, and the right end of Ds2 is connected with the right end of Rs 2.
In the main disconnection module, R1, C1, var1 are connected in parallel, that is, the left ends of R1, C1, var1 are directly connected, and the right ends of R1, C1, var1 are directly connected. The left end of the R1 is connected with a control terminal G1 of the drive-end oscillation suppression circuit. The right end of R1 is connected with a power terminal N of the direct current breaker.
In the main breaking module, the control terminals G, S of the dc breaker are connected to the drive terminal G1, source S1 of the device M1, respectively. The driving terminal G is connected to the upper end (positive electrode) of the diode, and the lower end (negative electrode) of the diode is connected to the left end of the resistor R1.
In the main disconnection module, the resistor R2 is connected in parallel with Var2, that is, the left end of the resistor R2 is connected to the left end of Var2, and the right end of the resistor R2 is connected to the right end of Var 2. The left end of the resistor R2 is connected with the d2 terminal of the device M2 and the power terminal N1 of the power end oscillation suppression module. The right end of the resistor R2 is connected to the terminal S1 of the drive-end oscillation suppression circuit unit. The left end of the capacitor C2 is connected with the N1, and the right end of the capacitor C2 is connected with the N.
In the power end oscillation suppression module, df is connected with Rd in parallel, that is, the upper end of Df is connected with the upper end of Rd to form a terminal P1, the terminal is connected with a power terminal P of the dc circuit breaker, and the lower end of Df is connected with the lower end of Rd to form a terminal N1, which is connected with a terminal d2 of a device M2 in the main breaking module.
In the drive-end oscillation suppression circuit unit, S1 is connected to S2. And Zd is connected in parallel at two ends of G1 and S1, the upper end (negative pole) of Zd is connected with G1, and the lower end (positive pole) of Zd is connected with S1. Cd is connected with two ends of the G2 and the S2 in parallel, the upper end of the Cd is connected with the G2, and the lower end of the Cd is connected with the S2. Rd is connected in series between G1 and G2, the left end of the Rd is connected with G1, and the right end of the Rd is connected with G2.
The number of series devices in the main breaking module can be determined by actual requirements, fig. 1 shows a specific embodiment in which two power semiconductor devices are connected in series, each device can be formed by connecting a plurality of power semiconductor devices with lower current levels in parallel, and the power levels and the number of the specific series-parallel devices can be determined by actual requirements.
The invention provides a master-slave driving device series direct current breaker with an oscillation suppression function, which has a simple control method and comprises the following specific control processes:
when the line or the equipment is in a normal working state, the control unit sends out a high level to control the two series-connected devices in the main breaking module to be kept conducted, and the load current flows through the diode in the power end oscillation suppression circuit and the conducting channel of the two series-connected power semiconductor devices in the main breaking module. When the system detects that the short-circuit fault occurs, the driving level of two ends of the control terminal in the main breaking module is changed from high to low, and then the main breaking module executes the short-circuit current breaking operation. When the short-circuit energy is completely absorbed, the two series devices are both in an off state, and the circuit breaker is in an off state. When the fault is relieved, the driving levels at two ends of a control terminal in the main breaking module are changed from low to high, the driving device is controlled to be switched on, the driven device is controlled to enter a conducting state through a capacitive coupling principle, the load current flows through a diode in the power end oscillation suppression circuit and conducting channels of two series power semiconductor devices in the main breaking module, and the direct current circuit breaker is in a normal load current carrying and flowing state.
Furthermore, the direct current circuit breaker of the invention utilizes the power semiconductor devices with lower voltage to be connected in series to form the direct current circuit breaker with higher withstand voltage, and the driving of the series devices adopts a capacitive coupling type driving principle.
The circuit breaker comprises a power end oscillation suppression module and a main breaking module.
The main body of the execution unit is a series structure of two power semiconductor devices, the external controller drives and controls the series power semiconductor devices through two driving terminals, the breaking operation of direct-current short-circuit current is carried out, short-circuit energy stored on a current-limiting reactor is absorbed, and the whole process has no obvious oscillation phenomenon, so that the driving reliability of a driven device is ensured, and the safe and stable operation of the direct-current breaker is ensured.
The main breaking module comprises four terminals, two control terminals and two power terminals.
The control terminal is connected with an external control unit, and the power terminal is a connection interface of the direct current circuit breaker and the direct current system.
The main breaking module only comprises passive elements such as a resistor, a capacitor, a lightning arrester and the like, and unidirectional conductive devices such as a voltage stabilizing diode, a high-voltage diode and the like except two power semiconductor devices connected in series.
The topological structure can utilize the capacitive coupling principle to realize the reliable control of the external drive of the driving device on the driven device, and meanwhile, the dynamic voltage balance and the static voltage balance of the series semiconductor power device can also be ensured.
In the main breaking module, the short-circuit energy absorption element is a piezoresistor, and the two piezoresistors are connected in parallel at two ends of the corresponding static voltage-sharing resistor.
The power end oscillation suppression module is connected with the main breaking module, and a diode in the power end oscillation suppression module and a conductive channel of a series power device in the main breaking module are communicated with a direct current load current.
The power end oscillation suppression module and the driving end oscillation suppression circuit in the main breaking module act together to suppress the oscillation of the terminal voltage and the voltage driven by the driven device after the direct-current breaker absorbs the short-circuit energy, so that the driven device is ensured to have stable negative voltage, and the driven device is prevented from being conducted by mistake.
In the main breaking unit, the driving end of the direct current breaker is connected with the driving end of the driving end oscillation suppression circuit unit, the topology is not limited to two cascade devices, the topology can be expanded to a breaker topology based on three or more cascade devices, meanwhile, each series device can also be formed by connecting a plurality of devices with lower current levels in parallel, and the power semiconductor device is a silicon carbide MOSFET device or an IGBT device.
It should be noted that, regarding the specific structure of the present invention, the connection relationship between the modules adopted in the present invention is determined and can be realized, except for the specific description in the embodiment, the specific connection relationship can bring the corresponding technical effect, and the technical problem proposed by the present invention is solved on the premise of not depending on the execution of the corresponding software program.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (2)
1. A master-slave driving device series direct current breaker comprises a master breaking module (1) and a power end oscillation suppression module (2), and is characterized in that: the positive power terminal P of the direct current breaker is connected with the power end oscillation suppression module (2), the negative power terminal N of the direct current breaker is connected with the main breaking module (1), the driving end oscillation suppression module (3) is further arranged inside the main breaking module (1), and the output end of the power end oscillation suppression module (2) is connected with the driving terminal of the driving end oscillation suppression module (3) in parallel and then connected with the negative power terminal N of the direct current breaker;
at least two cascade devices (4) are arranged between the drive end oscillation suppression module (3) and a negative power terminal N of the direct current breaker;
the cascade device (4) is specifically two power semiconductor devices connected in series: the driving device M1 and the driven device M2 are used as short-circuit current breaking elements of the circuit breaker, wherein the driving end of the driven device M2 is connected with the driving terminal of the driving-end oscillation suppression module (3);
the control ends of the driving device M1 and the driven device M2 are connected with a controller through leads, control signals are provided by the controller, the positive and negative level amplitudes of driving voltage are adjusted according to different used devices, and the driving control of the two series devices is realized by a single control signal;
the drive end oscillation suppression module (3) is specifically a pi-type network circuit consisting of a voltage stabilizing diode Zd, a damping resistor Rg and a damping capacitor Cd;
the driving terminals of the driving end oscillation suppression module (3) are respectively G1 and G2, the source terminals of the driving end oscillation suppression module (3) are respectively S1 and S2, and the circuit structure of the driving end oscillation suppression module (3) is as follows:
the driving terminal G1 is connected with one end of a damping resistor Rg after being connected with the cathode of a voltage stabilizing diode Zd in parallel through a lead, the other end of the damping resistor Rg is connected with one end of a damping capacitor Cd in parallel and then is connected with the driving terminal G2, and the source terminal S1 is connected with the anode of the voltage stabilizing diode Zd and the other end of the damping capacitor Cd in parallel sequentially through leads and then is connected with the source terminal S2;
the power end oscillation suppression module (2) is specifically a network circuit composed of a high-voltage diode Df and a damping resistor Rd;
the positive terminal of the power end oscillation suppression module (2) is P1, the negative terminal is N1, and the circuit structure of the power end oscillation suppression module (2) is as follows:
the anode of the high-voltage diode Df is connected with one end of the damping resistor Rd in parallel and then is connected with the anode terminal P1, and the cathode of the high-voltage diode Df is connected with the other end of the damping resistor Rd in parallel and then is connected with the cathode terminal N1;
the circuit structure of the main breaking module (1) is as follows: the negative terminal N1 is respectively connected with the anode of a diode Ds2 in parallel, one end of a resistor Rs2, the drain of a driven device M2 and one end of a resistor R2 in parallel, one end of an adjustable resistor Var2 is connected with one end of a capacitor C2 in parallel, the cathode of the diode Ds2 is connected with one end of the capacitor Cs2 in parallel, the other end of the capacitor Cs2 is respectively connected with the source of the driven device M2 in parallel, the anode of the diode Ds1 and one end of the resistor Rs1 in parallel and then connected with the drain of a driving device M1, the cathode of the diode Ds1 is connected with the other end of the resistor Rs1 in parallel and then connected with one end of the capacitor Cs1, and the other end of the capacitor Cs1 is respectively connected with the source of the driving device M1 in parallel, one end of the resistor R1, one end of the capacitor C1, one end of the adjustable resistor Var1 and the other end of the capacitor C2 in parallel and then connected with the negative power terminal N of the direct current breaker;
the driving terminal G2 of the driving end oscillation suppression module (3) is connected with the driving terminal of the driven device M2;
a source terminal S2 of the driving end oscillation suppression module (3) is connected with a source electrode of a driven device M2;
a driving terminal G1 of the driving end oscillation suppression module (3) is respectively connected with the other end of the resistor R1, the other end of the capacitor C1 and the other end of the adjustable resistor Var1 in parallel and then connected with the cathode of the diode D1;
the anode of the diode D1 is connected with the driving terminal of the active device M1;
and a source terminal S1 of the driving end oscillation suppression module (3) is connected with the other end of the resistor R2 in parallel and then connected with the other end of the adjustable resistor Var 2.
2. A master-slave drive device series dc circuit breaker according to claim 1, wherein: the control method of the direct current circuit breaker with the serial connection of the master-slave driving devices comprises the following steps:
the method comprises the following steps: when a line or equipment is in a normal working state, the control unit sends out a high-level signal to control two series-connected cascade devices (4) in the main breaking module (1) to be kept conducted, and load current flows through a diode in the power end oscillation suppression module (2) and conducting channels of the two series-connected cascade devices (4) in the main breaking module (1);
step two: when the system detects that a short-circuit fault occurs, the driving level of two ends of a control terminal in the main breaking module (1) is changed from high to low, and the main breaking module (1) then executes short-circuit current breaking operation;
step three: when the short-circuit energy is completely absorbed, the two series cascade devices (4) are in an off state, and the circuit breaker is in an off state;
step four: after the fault is relieved, the driving levels at two ends of a control terminal in the main breaking module (1) are changed from low to high, the driving device M1 is controlled to be switched on, the driven device M2 is controlled to enter a conduction state through a capacitive coupling principle, the load current flows through a diode in the power end oscillation suppression module (2) and conduction channels of two series-connected cascade devices (4) in the main breaking module (1), and at the moment, the direct-current circuit breaker is in a normal load current carrying and circulating state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010803768.8A CN111952991B (en) | 2020-08-11 | 2020-08-11 | Master-slave driving device series-connection type direct current circuit breaker and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010803768.8A CN111952991B (en) | 2020-08-11 | 2020-08-11 | Master-slave driving device series-connection type direct current circuit breaker and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111952991A CN111952991A (en) | 2020-11-17 |
| CN111952991B true CN111952991B (en) | 2023-03-21 |
Family
ID=73332818
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010803768.8A Active CN111952991B (en) | 2020-08-11 | 2020-08-11 | Master-slave driving device series-connection type direct current circuit breaker and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111952991B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104617581A (en) * | 2015-03-05 | 2015-05-13 | 太原理工大学 | Soft-start control method of four-bridge arm active power filter |
| CN107171292A (en) * | 2017-07-12 | 2017-09-15 | 重庆大学 | A kind of device for suppressing shut-off overvoltage based on SiC MOSFET DC solid circuit breakers |
| CN110192343A (en) * | 2017-01-13 | 2019-08-30 | 西门子股份公司 | Power supply system and method |
| CN210807733U (en) * | 2019-11-25 | 2020-06-19 | 常州绿威电器有限公司 | AC/DC LED driver for emergency lighting |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106253243B (en) * | 2016-08-09 | 2018-09-28 | 南京南瑞继保电气有限公司 | A kind of shutting-brake control method of high voltage DC breaker |
-
2020
- 2020-08-11 CN CN202010803768.8A patent/CN111952991B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104617581A (en) * | 2015-03-05 | 2015-05-13 | 太原理工大学 | Soft-start control method of four-bridge arm active power filter |
| CN110192343A (en) * | 2017-01-13 | 2019-08-30 | 西门子股份公司 | Power supply system and method |
| CN107171292A (en) * | 2017-07-12 | 2017-09-15 | 重庆大学 | A kind of device for suppressing shut-off overvoltage based on SiC MOSFET DC solid circuit breakers |
| CN210807733U (en) * | 2019-11-25 | 2020-06-19 | 常州绿威电器有限公司 | AC/DC LED driver for emergency lighting |
Non-Patent Citations (1)
| Title |
|---|
| 耦合型机械式高压直流断路器研究;潘垣等;《中国电机工程学报》;20181220;第38卷(第24期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111952991A (en) | 2020-11-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10418803B2 (en) | Direct current switch-off device and control method thereof | |
| CN101242136B (en) | Voltage source frequency converter bridge arm direct pass protector for three level integrated gate pole conversion transistor | |
| CN103618298A (en) | High-voltage direct-current breaker | |
| CN102522882B (en) | Protection circuit of converter power component | |
| CN202749820U (en) | H-bridge cascaded SVG power unit circuit | |
| CN109274269B (en) | Direct-current chopping device and control method | |
| CN109546672B (en) | Direct current energy consumption device, system and control method | |
| KR102541790B1 (en) | High voltage battery cluster and overcurrent protection circuit and switch box of high voltage battery cluster | |
| CN104753044A (en) | Topological structure of hybrid all-solid state high-voltage DC breaker | |
| CN203326702U (en) | Dual power supply switching device | |
| CN103681039A (en) | High-voltage direct-current breaker topology | |
| CN103441489A (en) | Direct-current breaker used for multi-terminal direct current system and control method of direct-current breaker | |
| CN106024497B (en) | Auxiliary circuit for high-short-circuit turn-off direct-current circuit breaker and control method thereof | |
| CN111030158B (en) | Energy consumption branch circuit for preventing direct-current side overvoltage of direct-current power transmission system and control method | |
| CN109327016B (en) | Direct-current interelectrode breaking device and control method | |
| CN103138601B (en) | Four-quadrant power component and conversion cabinet | |
| CN111952991B (en) | Master-slave driving device series-connection type direct current circuit breaker and control method thereof | |
| CN109066609B (en) | All-solid-state direct current breaker topological structure based on cascade SiC MOSFET | |
| CN113725831B (en) | Economical mechanical high-voltage direct-current circuit breaker | |
| CN104866656A (en) | Bridge arm equivalent circuit of modular multilevel converter with full-bridge structure | |
| CN108768184B (en) | Switch power unit and high-voltage direct-current circuit breaker | |
| CN201766494U (en) | Bypass circuit of chain link in high-voltage chained static synchronization compensator | |
| CN211089475U (en) | Parallel structure of electric locomotive four-quadrant power module IGBT | |
| CN201160258Y (en) | 3-power level integrated gate commutate thyristor frequency converter bridge arm straight-through protector | |
| CN111277002A (en) | Flexible excitation power unit parallel topology structure and control method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |