CN110601160A - High-energy feedback type load energy backflow discharge circuit and energy discharge method thereof - Google Patents
High-energy feedback type load energy backflow discharge circuit and energy discharge method thereof Download PDFInfo
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- CN110601160A CN110601160A CN201910886586.9A CN201910886586A CN110601160A CN 110601160 A CN110601160 A CN 110601160A CN 201910886586 A CN201910886586 A CN 201910886586A CN 110601160 A CN110601160 A CN 110601160A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
- H02H9/025—Current limitation using field effect transistors
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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
- H02M1/32—Means for protecting converters other than automatic disconnection
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Abstract
The invention discloses a high-energy feedback type load energy backflow release circuit and an energy release method thereof, wherein the circuit comprises an H-bridge circuit, a first inductor, a second inductor, a thyristor branch circuit and a feedback type load, the H-bridge circuit is provided with a first IGBT, a second IGBT, a third IGBT and a fourth IGBT, each IGBT device is connected with a diode in parallel, the C pole of each IGBT device is connected with the negative pole of the diode, and the E pole of each IGBT device is connected with the positive pole of the diode; two ends of the first inductor are respectively connected with the E pole of the first IGBT and one end of the feedback type load, and two ends of the second inductor are respectively connected with the C pole of the fourth IGBT and the other end of the feedback type load; the first IGBT, the diode connected with the third IGBT in parallel, the first inductor, the second inductor and the feedback type load form a first energy consumption path, and the thyristor branch is connected with the feedback type load in parallel to form a second energy consumption path. The inverter H bridge and the thyristor branch circuit are matched fast and slowly to finish load energy release, and the inverter H bridge and the thyristor branch circuit are high in reliability, small in size and low in cost.
Description
Technical Field
The invention relates to the technical field of power electronics, in particular to a high-energy feedback type load energy backflow discharge circuit and an energy discharge method thereof.
Background
Generally, for energy feedback type loads, when the load is shut down, all the stored energy of the load is fed back to a power supply, and energy feedback processing modes comprise feeding back to a power grid, storing and discharging; when energy is fed back, the load energy is stored and fed back to a bus capacitor in the power supply through a diode of the H-bridge, so that the bus voltage is increased, and if the capacity of the bus capacitor and the voltage grade are not properly matched with the load energy, the bus capacitor is possibly damaged due to overvoltage; in the prior art, a three-phase PWM rectifier is arranged on the side of an alternating current power grid to complete load energy feedback, but the power device of the whole system is complicated, large in size and high in manufacturing cost, and the whole control mode is complex and is difficult to operate.
Disclosure of Invention
In order to overcome the defects and shortcomings in the prior art, the invention provides a high-energy feedback type load energy backflow release circuit and an energy release method thereof, solves the unreliable problem caused by the fact that the heat capacity of components exceeds the limit due to the fact that large current flows through components inside a power supply in the energy storage and feedback power grid scheme, and completes load energy release by matching an inverter H bridge and a thyristor branch circuit quickly and slowly.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a high-energy feedback type load energy backflow bleeder circuit, comprising: the circuit comprises an H-bridge circuit, a first inductor, a second inductor, a thyristor branch circuit and a feedback type load;
the H-bridge circuit is provided with a first IGBT, a second IGBT, a third IGBT and a fourth IGBT, the C pole of the first IGBT is connected with the C pole of the third IGBT, the E pole of the first IGBT is connected with the C pole of the second IGBT, the E pole of the third IGBT is connected with the C pole of the fourth IGBT, the E pole of the fourth IGBT is connected with the E pole of the second IGBT, each IGBT device is connected with a diode in parallel, the C pole of each IGBT device is connected with the cathode of the diode, and the E pole of each IGBT device is connected with the anode of the diode;
the first end of the first inductor is connected with the E pole of the first IGBT, the second end of the first inductor is connected with one end of the feedback type load, the first end of the second inductor is connected with the C pole of the fourth IGBT, and the second end of the second inductor is connected with the other end of the feedback type load;
the first IGBT, the diode connected with the third IGBT in parallel, the first inductor, the second inductor and the feedback type load form a first energy consumption path; the thyristor branch circuit is connected with the feedback type load in parallel to form a second energy consumption path.
As a preferred technical scheme, the thyristor branch is provided with a single thyristor, the thyristor is connected in parallel at two ends of the feedback type load, the cathode of the thyristor is connected with the second end of the first inductor, and the anode of the thyristor is connected with the second end of the second inductor.
As a preferred technical scheme, the thyristor branch is provided with a thyristor, a diode, a first voltage-sharing resistor and a second voltage-sharing resistor, the cathode of the thyristor is connected with the second end of the first inductor, the anode of the thyristor is connected with the cathode of the diode, the anode of the diode is connected with the second end of the second inductor, the first voltage-sharing resistor is connected in parallel with the thyristor, the second voltage-sharing resistor is connected in parallel with the diode, and the resistance values of the first voltage-sharing resistor and the second voltage-sharing resistor are the same.
As a preferred technical scheme, the thyristor and the diode both adopt devices with withstand voltage value of at least 6 kV.
As a preferable technical solution, a first capacitor and a second capacitor are further provided, one end of the first capacitor is connected to the second end of the first inductor, the other end of the first capacitor is connected to one end of the second capacitor and connected to a circuit ground, and the other end of the second capacitor is connected to the second end of the second inductor.
As a preferable technical scheme, the three-phase rectification circuit is further provided with a three-phase rectification circuit, a third capacitor and a fourth capacitor, the three-phase rectification circuit is constructed by adopting rectification diodes, the third capacitor is a bus capacitor, the positive electrode of the third capacitor is connected with the C electrode of the first IGBT, the negative electrode of the third capacitor is connected with the E electrode of the second IGBT, and the fourth capacitor is connected with the output of the three-phase rectification circuit in parallel.
The invention also provides an energy discharge method of the high-energy feedback type load energy backflow discharge circuit, which comprises the following steps:
s1: setting a first energy consumption path and a second energy consumption path, wherein the first energy consumption path comprises a first IGBT, a diode connected with a third IGBT in parallel, a first inductor, a second inductor and a feedback type load, a thyristor branch circuit is connected with the feedback type load in parallel to form the second energy consumption path, the first IGBT and the third IGBT in the H-bridge circuit are conducted, the second IGBT and the fourth IGBT are turned off at the same time, and load current flows and is consumed in the first energy consumption path;
s2: delaying the action of a second energy consumption path, wherein the load current is converted from the first energy consumption path to the second energy consumption path, the first energy consumption path and the second energy consumption path both consume the load energy, the sum of the currents of the two paths is equal to the load current, the current of the first energy consumption path is gradually reduced from the load current to zero, and the current of the second energy consumption path is gradually increased to the load current;
s3: starting timing when the current of the second energy consumption path is equal to the load current, and turning off the first IGBT and the third IGBT in the first energy consumption path after the timing time is finished;
s4: and when the load current is detected to be smaller than the threshold value, the thyristor branch circuit is closed to turn on the signal, and the residual load current is continuously consumed and completed in the second energy consumption path.
Compared with the prior art, the invention has the following advantages and beneficial effects:
(1) the invention solves the unreliable problem caused by the over-limit of the heat capacity of the components due to the fact that large current flows through the components inside the power supply in the energy storage and feedback power grid scheme, the inverter H bridge and the thyristor branch circuit are matched quickly and slowly to complete the release of load energy, and the invention has high reliability, small volume and low cost.
(2) The invention solves the problem of insufficient voltage resistance of a single heavy-current thyristor and avoids the problem of high-voltage isolation driving of a series thyristor of high-voltage equipment by configuring the thyristor and the diode in series in the thyristor branch and adopting voltage-sharing resistance to divide voltage.
Drawings
Fig. 1 is a schematic structural diagram of a high-energy feedback type load energy backflow bleeder circuit in this embodiment 1;
fig. 2 is a schematic flow diagram illustrating a first consumption path of the high-energy feedback type load energy backflow bleeder circuit in the embodiment 1;
fig. 3 is a schematic flow diagram illustrating a second consumption path of the high-energy feedback type load energy backflow bleeder circuit in the embodiment 1;
fig. 4 is a schematic flow chart illustrating an energy discharge method of the high-energy feedback type load energy backflow discharge circuit in the embodiment 1;
fig. 5 is a schematic structural diagram of the high-energy feedback type load energy backflow bleeder circuit in this embodiment 2;
fig. 6 is a schematic view of the overall discharging structure of the high-energy feedback type load energy backflow discharging circuit in this embodiment 2.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
As shown in fig. 1, the present embodiment provides a high-energy feedback type load energy backflow bleeder circuit, which includes: four IGBT devices (V1, V2, V3, V4), a first inductance L1, a second inductance L2, a first capacitance C1, a second capacitance C2, and a thyristor V5;
in the embodiment, each IGBT device is connected with a diode in parallel, the C pole of each IGBT device is connected with the cathode of the diode, the E pole is connected with the anode of the diode, four IGBT devices and the respective diodes connected in parallel form an H-bridge circuit, the C poles of the IGBT devices V1 and V3 are connected with the anode of the third capacitor (i.e., bus capacitor) C3, the E poles of the IGBT devices V2 and V4 are connected with the cathode of the third capacitor (i.e., bus capacitor) C3, one end of the first inductor L1 is connected with the E pole of the IGBT device V1, the other end is connected with the feedback load and is connected with the first end of the first capacitor C1, the second end of the first capacitor C1 is grounded, one end of the second inductor L2 is connected with the C pole of the IGBT device V4, the other end is connected with the feedback load and is connected with the first end of the second capacitor C2, and the second end of the second capacitor C2 is grounded;
as shown in fig. 2, according to the characteristics of the circuit, the switching on and off of the switching tube is adjusted to provide a first consumption path (i.e., a path (r)) for feedback energy, the first consumption path is mainly a similar short-circuit path formed by an inverter bridge, the first consumption path comprises a diode connected in parallel with an IGBT device V1 and an IGBT device V3, a first inductor L1, a second inductor L2 and a feedback load to form an energy consumption loop, and the direction of the loop current is shown by an arrow in the path (r) in fig. 2;
as shown in fig. 3, the present embodiment provides a second consumption path (i.e., path:), where the second consumption path is mainly a short-circuit-like path formed by a thyristor, and includes a thyristor device V5 and a feedback-type load to form a consumption loop, the direction of the return current is shown by the arrow in fig. 3, the thyristor is connected in parallel to two ends of the feedback-type load, the cathode of the thyristor device V5 is connected to the first end of the first capacitor C1, and the anode of the thyristor device V5 is connected to the first end of the second capacitor C2;
when a power supply or load network fault needs to open a release loop in time, related action control commands of the path I and the path II are simultaneously sent by an upper-layer control system, V1 and V3 of the path I act rapidly within 10 microseconds, but V1 and V3 are IGBT devices, the thermal capacity is small, and large current can be borne only in a short time. The thyristor V5 of path 2 operates within a delay of about 10ms, but has a large heat capacity and can withstand a large current for a relatively long time.
As shown in fig. 4, the present embodiment further provides an energy bleeding method of a high-energy feedback type load energy backflow bleeding circuit, and the load energy consumption and bleeding process of the present embodiment includes five stages:
stage 1: when the load is in fault or the power supply is in fault, the upper control system controls the paths (i) and (ii) to work simultaneously. However, because the response speed of the corresponding devices in the path I is high, the IGBT devices V1 and V3 are controlled to be opened at first, meanwhile, the IGBT devices V2 and V4 are turned off to form a short-circuit loop, at the moment, the load current flows and is consumed among diodes connected in parallel with the IGBT devices V1 and V3, a first inductor L1, a second inductor L2 and the inductor of the feedback type load, the load current cannot be injected into a bus capacitor C3, and all the devices in the path I consume load energy;
and (2) stage: when the path II acts after delaying for 10ms, the loop is a small impedance network directly formed by a thyristor V5 and a feedback type load, the load current naturally flows from the path I to the path II, the paths I and II consume the load energy at the stage, the sum of the two paths of current is equal to the load current, the current of the path I gradually decreases from the load current to 0, and the current of the path II gradually increases to the load current;
and (3) stage: load energy is consumed in a path II, meanwhile, devices in the path I are conducted to work but no current exists in a loop, the time is timed for 5S, switching devices V1 and V3 in the upper control system control path I bear reverse gate voltage and are turned off, and the current of a thyristor V5 in the path II is equal to the load current at the stage;
and (4) stage: load energy is consumed in a path II independently, a device cut-off loop of the path I has no current, when an upper-layer control system detects that load current is less than 10A, the control system closes a control signal of V5 in the path II, and the current of V5 in the path II at the stage is equal to the load current;
and (5) stage: because V5 in path II is a half-control device, when the control signal is removed, it and the load form a current loop to continuously work until the residual load current is continuously consumed in path II, and the current of device V5 in path II is equal to the load current.
In the embodiment, energy consumption and discharge are carried out by means of IGBT conducting short circuit in a power supply circuit topology, meanwhile, although a transistor in the power supply can act in the time of the order of mu s, the heat capacity is limited, a thyristor circuit which acts in the output port of the power supply in the order of ms but has large heat capacity forms a low-impedance loop to replace the IGBT in the power supply, and the fast and slow circuits are matched to complete load feedback energy consumption and discharge.
Example 2
The technical scheme of the embodiment 2 is the same as that of the embodiment 1 except for the following technical features:
in order to solve the problem that a single large-current thyristor is insufficient in withstand voltage, the thyristor branch is configured as a thyristor V5 and a diode V6 which are connected in series, the positive peak voltage of the circuit of the embodiment is 6kV, and the negative peak voltage of the circuit of the embodiment is not more than 3 kV;
as shown in fig. 5, the cathode of the thyristor V5 is connected to the first end of the first capacitor C1, the anode of the thyristor V5 is connected to the cathode of the diode V6, the anode of the diode V6 is connected to the first end of the second capacitor C2, the two ends of the thyristor V5 are connected in parallel to the equalizing resistor R1, the two ends of the diode V6 are connected in parallel to the equalizing resistor R2, when the power supply outputs a positive peak voltage of +6kV, the thyristor V5 and the diode V6 are both blocked, the series connection bears 6kV voltage, and the equalizing voltage is ensured by the equalizing resistor R1 and the equalizing resistor R2; when the power supply outputs negative peak voltage of-3 kV, the thyristor V5 is cut off, the diode V6 is conducted, and the thyristor V5 bears the negative voltage alone.
As shown in fig. 6, on the basis of small increase in cost and volume, the H-bridge topology of the circuit of the embodiment is combined, the thyristor V5, the diode V6, and the voltage-sharing resistors R1 and R2 of the thyristor branch are added, the three-phase rectification circuit formed by building the diodes is configured on the ac side to complete load energy feedback, the three-phase rectification current output is connected in parallel with the fourth capacitor (i.e., the filter capacitor) C4, the load energy discharge circuit of the embodiment is complemented by two fast and slow discharge paths, and has high reliability, small volume, and low cost.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (7)
1. A high-energy feedback type load energy backflow bleeder circuit is characterized by comprising: the circuit comprises an H-bridge circuit, a first inductor, a second inductor, a thyristor branch circuit and a feedback type load;
the H-bridge circuit is provided with a first IGBT, a second IGBT, a third IGBT and a fourth IGBT, the C pole of the first IGBT is connected with the C pole of the third IGBT, the E pole of the first IGBT is connected with the C pole of the second IGBT, the E pole of the third IGBT is connected with the C pole of the fourth IGBT, the E pole of the fourth IGBT is connected with the E pole of the second IGBT, each IGBT device is connected with a diode in parallel, the C pole of each IGBT device is connected with the cathode of the diode, and the E pole of each IGBT device is connected with the anode of the diode;
the first end of the first inductor is connected with the E pole of the first IGBT, the second end of the first inductor is connected with one end of the feedback type load, the first end of the second inductor is connected with the C pole of the fourth IGBT, and the second end of the second inductor is connected with the other end of the feedback type load;
the first IGBT, the diode connected with the third IGBT in parallel, the first inductor, the second inductor and the feedback type load form a first energy consumption path; the thyristor branch circuit is connected with the feedback type load in parallel to form a second energy consumption path.
2. The energy backflow releasing circuit of claim 1 wherein the thyristor branch is provided with a single thyristor, the thyristor is connected in parallel across the feedback load, the cathode of the thyristor is connected to the second terminal of the first inductor, and the anode of the thyristor is connected to the second terminal of the second inductor.
3. The energy feedback type load energy backflow releasing circuit as claimed in claim 1, wherein the thyristor branch is provided with a thyristor, a diode, a first equalizing resistor and a second equalizing resistor, the cathode of the thyristor is connected to the second end of the first inductor, the anode of the thyristor is connected to the cathode of the diode, the anode of the diode is connected to the second end of the second inductor, the first equalizing resistor is connected in parallel with the thyristor, the second equalizing resistor is connected in parallel with the diode, and the first equalizing resistor and the second equalizing resistor have the same resistance.
4. The feedback load energy reflux bleeder circuit of claim 3, wherein said thyristor and said diode are both devices having a voltage resistance of at least 6 kV.
5. The feedback load energy backflow release circuit as claimed in any one of claims 1-4, further comprising a first capacitor and a second capacitor, wherein one end of the first capacitor is connected to the second end of the first inductor, the other end of the first capacitor is connected to one end of the second capacitor and connected to circuit ground, and the other end of the second capacitor is connected to the second end of the second inductor.
6. The feedback load energy reflux bleeder circuit of any one of claims 1-4, further comprising a three-phase rectifier circuit, a third capacitor and a fourth capacitor, wherein said three-phase rectifier circuit is constructed by rectifier diodes, said third capacitor is configured as a bus capacitor, the positive pole of said third capacitor is connected to the C pole of said first IGBT, the negative pole of said third capacitor is connected to the E pole of said second IGBT, and said fourth capacitor is connected in parallel with the output of said three-phase rectifier circuit.
7. An energy discharge method of a high-energy feedback type load energy backflow discharge circuit is characterized by comprising the following steps:
s1: setting a first energy consumption path and a second energy consumption path, wherein the first energy consumption path comprises a first IGBT, a diode connected with a third IGBT in parallel, a first inductor, a second inductor and a feedback type load, a thyristor branch circuit is connected with the feedback type load in parallel to form the second energy consumption path, the first IGBT and the third IGBT in the H-bridge circuit are conducted, the second IGBT and the fourth IGBT are turned off at the same time, and load current flows and is consumed in the first energy consumption path;
s2: delaying the action of a second energy consumption path, wherein the load current is converted from the first energy consumption path to the second energy consumption path, the first energy consumption path and the second energy consumption path both consume the load energy, the sum of the currents of the two paths is equal to the load current, the current of the first energy consumption path is gradually reduced from the load current to zero, and the current of the second energy consumption path is gradually increased to the load current;
s3: starting timing when the current of the second energy consumption path is equal to the load current, and turning off the first IGBT and the third IGBT in the first energy consumption path after the timing time is finished;
s4: and when the load current is detected to be smaller than the threshold value, the thyristor branch circuit is closed to turn on the signal, and the residual load current is continuously consumed and completed in the second energy consumption path.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023168757A1 (en) * | 2022-03-09 | 2023-09-14 | 薛洛良 | Parallel connection method for balance-to-ground of output of csr high-frequency pwm rectification circuit |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050001484A1 (en) * | 2003-04-11 | 2005-01-06 | Thomas Mohr | EMC-optimized device for controlling a fan |
| CN101127490A (en) * | 2006-03-21 | 2008-02-20 | 上海恒精机电设备有限公司 | A high power transistor frequency conversion power supply |
| CN101459386A (en) * | 2007-12-10 | 2009-06-17 | 张东胜 | Electricity production feedback system using renewable energy source |
| CN103166495A (en) * | 2011-12-09 | 2013-06-19 | 上海康威特吉能源技术有限公司 | Single phase asymmetrical full-bridge non-isolated photovoltaic grid-connected inverter |
| CN203398998U (en) * | 2013-05-13 | 2014-01-15 | 大连普传科技股份有限公司 | Vector frequency converter |
| CN108155827A (en) * | 2018-03-09 | 2018-06-12 | 浙江艾罗网络能源技术有限公司 | A kind of modified single-phase inverter |
| CN108809067A (en) * | 2018-06-15 | 2018-11-13 | 湖北德普电气股份有限公司 | A kind of controllable type capacitive energy leadage circuit |
-
2019
- 2019-09-19 CN CN201910886586.9A patent/CN110601160B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050001484A1 (en) * | 2003-04-11 | 2005-01-06 | Thomas Mohr | EMC-optimized device for controlling a fan |
| CN101127490A (en) * | 2006-03-21 | 2008-02-20 | 上海恒精机电设备有限公司 | A high power transistor frequency conversion power supply |
| CN101459386A (en) * | 2007-12-10 | 2009-06-17 | 张东胜 | Electricity production feedback system using renewable energy source |
| CN103166495A (en) * | 2011-12-09 | 2013-06-19 | 上海康威特吉能源技术有限公司 | Single phase asymmetrical full-bridge non-isolated photovoltaic grid-connected inverter |
| CN203398998U (en) * | 2013-05-13 | 2014-01-15 | 大连普传科技股份有限公司 | Vector frequency converter |
| CN108155827A (en) * | 2018-03-09 | 2018-06-12 | 浙江艾罗网络能源技术有限公司 | A kind of modified single-phase inverter |
| CN108809067A (en) * | 2018-06-15 | 2018-11-13 | 湖北德普电气股份有限公司 | A kind of controllable type capacitive energy leadage circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023168757A1 (en) * | 2022-03-09 | 2023-09-14 | 薛洛良 | Parallel connection method for balance-to-ground of output of csr high-frequency pwm rectification circuit |
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