CN107732887A - A kind of damping module based on switching device series connection - Google Patents
A kind of damping module based on switching device series connection Download PDFInfo
- Publication number
- CN107732887A CN107732887A CN201710936152.6A CN201710936152A CN107732887A CN 107732887 A CN107732887 A CN 107732887A CN 201710936152 A CN201710936152 A CN 201710936152A CN 107732887 A CN107732887 A CN 107732887A
- Authority
- CN
- China
- Prior art keywords
- damping
- switching device
- series connection
- full
- controlled switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
-
- 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
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/045—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage adapted to a particular application and not provided for elsewhere
Abstract
The present invention relates to a kind of damping module based on switching device series connection, including the switching branches being connected in parallel and damping branch road, string is provided with least two full-controlled switch devices in the same direction in the switching branches, and string is provided with damping resistance in the damping branch road.The damping module of the present invention sets multiple full-controlled switch devices by being gone here and there in switching branches, increase the voltage carrying capacity at switching branches both ends, so in a switching branches both ends Large Copacity damping resistance determined according to the requirement of system recovery time in parallel, when DC bipolar short trouble occurs for system, Large Copacity damping resistance can quickly consume the energy in fault loop, the decay of fault current is accelerated, shorten system restarts the time；Also, because small number of such damping module can meet application demand, increase the flexibility of structure design.
Description
Technical field
The present invention relates to a kind of damping module based on switching device series connection, belong to technical field of HVDC transmission.
Background technology
Extensive development and popularization and application Technology of HVDC based Voltage Source Converter, so as to promote large-scale distributed new-energy grid-connected,
The development of the new technology such as urban electricity supply and island with power, meet the clean and effective profit of the energy demand and energy to maintain sustained and rapid growth
With meeting electric power industry development rule and electric power network technique developing direction.
Flexible direct current power transmission system forms transverter using full-controlled switch device, using pulse width modulation or ladder
Ripple modulation technique, solve many intrinsic bottlenecks of customary DC technology of transmission of electricity.For AC system, due to direct current system
The low damping characteristic of system, during DC bipolar short trouble, faster, control protection difficulty is bigger for its fault progression.Fault moment, change
The critical equipments such as stream device can bear the electric stress of harshness, reduce the security of equipment operation.It is real effectively to solve the problem
Existing change of current station failure quickly isolates, and the stable operation without influenceing other sound stations, can use and install damping mould additional in the valve Room
The scheme of block.
Current damping module scheme, the general topology using shown in Fig. 1, mainly by IGBT and damping resistance parallel connection group
Into can quickly isolate failure, shorten the time that flexible direct current power transmission system is recovered.Because system failure electric current is typically to determine
, and the port for the grafting damping module reserved in equipment is limited, and following drawback be present in the topology：Based on IGBT voltage class
Limitation, damping resistance value cannot select it is excessive (damping resistance both end voltage may not exceed its parallel IGBT bear energy
Power), and damping module quantity (cannot define the total damping resistance value of transverter) too much, limit declining for fault current
The recovery time of deceleration and system.
The content of the invention
It is an object of the invention to provide a kind of damping module based on switching device series connection, for solving flexible DC power transmission
When DC bipolar short trouble occurs for system, fault current decay and system restart the problem of slower.
In order to solve the above technical problems, the invention provides a kind of damping module based on switching device series connection, including simultaneously
Join the switching branches and damping branch road of connection, string in the same direction is provided with least two full-controlled switch devices, institute in the switching branches
State string in damping branch road and be provided with damping resistance.
Further, the both ends of the full-controlled switch device are also parallel with Absorption Capacitance.
Further, the both ends of each full-controlled switch device are additionally provided with anti-paralleled diode.
Further, the full-controlled switch device is IGBT.
Further, in addition to control module, the control module control connect each full-controlled switch device.
Further, the control module is Control card.
The beneficial effects of the invention are as follows：
The damping module sets multiple full-controlled switch devices by being gone here and there in switching branches, increases switching branches both ends
Voltage carrying capacity, so one in parallel of switching branches both ends, the Large Copacity determined according to the requirement of system recovery time damps
Resistance, when system jam, Large Copacity damping resistance can quickly consume the energy of fault loop, accelerate fault current
Decay, shorten system restarts the time；Also, because small number of such damping module can meet to apply need
Ask, increase the flexibility of structure design；Due to needing to absorb substantial amounts of energy, the body of damping module in the damping resistance short time
Product is mainly reflected on damping resistance, compared with using multiple damping modules of the prior art, is accelerating fault current decay
While, the volume of damping module is also effectively reduced, is easily installed；In addition, set multiple full controls by being gone here and there in switching branches
Type switching device, the voltage class of single full-controlled switch device can be reduced, constant situation is required in system recovery time
Under, reduce the production cost of damping module.
Further, by the both ends parallel connection Absorption Capacitance in full-controlled switch device, damping electricity is flowed through in fault current
During resistance, absorb in due to voltage spikes caused by full-controlled switch device both ends, effectively prevent the damage of full-controlled switch device.
Further, by setting anti-paralleled diode to each full-controlled switch device, it is ensured that the damping module
Two-way admittance ability in normal operation.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams of damping module in the prior art；
Fig. 2 is the circuit theory diagrams of damping module of the present invention based on switching device series connection.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, below in conjunction with accompanying drawing and specific implementation
The present invention will be described in further detail for example.
As shown in Fig. 2 the switch that damping module of the present invention based on switching device series connection includes control module, be connected in parallel
Branch road and damping branch road.
Wherein, string is provided with n full-controlled switch device in the same direction in switching branches, and the full-controlled switch device is anti-to be provided with
The IGBT of parallel diode, possess two-way admittance function, respectively T1, T2 ..., Tn.IGBT is full control property semiconductor devices, both
It can control its open-minded, also can control its shut-off.Certainly, IGBT can also be substituted for other full-controlled switch devices such as IGCT.
By taking full-controlled switch device T1 and T2 as an example, in series aiding connection, T1 emitter-base bandgap grading E and T2 colelctor electrode C are connected.
Control module is specifically a Control card KZ1, the above-mentioned n IGBT of Control card KZ1 connections, for reception
Level instruction, the switching device IGBT that controls and drive series connection while it is switched on or off, and uploads each switching device IGBT state
Information.Certainly, Control card KZ1 can also be substituted for the control of other control functions that can realize IGBT in the prior art
Module or control circuit.Corresponding each IGBT, its both ends is additionally provided with an Absorption Capacitance, respectively C1, C2 ..., Cn, the suction
Receive electric capacity to be used for when fault current flows through damping resistance, absorb in due to voltage spikes caused by switching device both ends, prevent split
Device is closed to cause to damage.
String is provided with Large Copacity damping resistance R1 in damping branch road, because full-controlled switch device is connected, damping resistance R1's
Resistance selection range expands, and can be determined according to the requirement of system recovery time.Damping resistance R1 is used to absorb and dissipative system
Energy caused by system fault moment, rapid decay fault current.
The operation principle of the above-mentioned damping module based on switching device series connection is as follows：
Under normal operating condition, if the sense of current is to flow to OUT1 ends from OUT2 ends, now system power flows through T1's
IGBT, T2 IGBT ..., Tn IGBT；If the sense of current is to flow to OUT2 ends from OUT1 ends, now system power flows through T1's
Anti-paralleled diode, T2 anti-paralleled diode ..., Tn anti-paralleled diode；And damping resistance R1 is bypassed, in hot standby
Use state.
After DC bipolar short trouble occurs, Control card KZ1 sends instruction, triggers T1, the IGBT passes in T2 ..., Tn
Disconnected, now fault current flows to OUT1 ends from OUT2 ends.Damping resistance R1 is put into, and fault current flows through R1, and fault current is quick
Decay.The voltage at R1 both ends is added in T1, on T2 ..., Tn, when Absorption Capacitance C1, C2 ..., Cn absorb fault current and flow through R1
Caused due to voltage spikes, prevent that, to T1, T2 ..., Tn causes to damage.
Under conditions of system short circuit capacity and system recovery time determine, the resistance of the invention based on switching device series connection
After Buddhist nun's module uses switching device series system, the damping module number in converter bridge arm can be reduced, and increased structure and set
The flexibility of meter；Simultaneously because the voltage class of switching device can reduce, the production cost of damping module is reduced；Due to resistance
The volume of Buddhist nun's module is mainly reflected on damping resistance, and series connection multiple switch device can't significantly affect the big of damping module
It is small, therefore compared with using multiple damping modules of the prior art, effectively reduce volume, be easily installed.
Specific embodiment is presented above, but the present invention is not limited to described embodiment.The base of the present invention
This thinking is above-mentioned basic scheme, for those of ordinary skill in the art, according to the teachings of the present invention, designs various changes
The model of shape, formula, parameter simultaneously need not spend creative work.It is right without departing from the principles and spirit of the present invention
The change, modification, replacement and modification that embodiment is carried out are still fallen within protection scope of the present invention.
Claims (6)
1. a kind of damping module based on switching device series connection, it is characterised in that including the switching branches being connected in parallel and damping
Branch road, string is provided with least two full-controlled switch devices in the same direction in the switching branches, and string, which is provided with, in the damping branch road damps
Resistance.
2. the damping module according to claim 1 based on switching device series connection, it is characterised in that the full-controlled switch
The both ends of device are also parallel with Absorption Capacitance.
3. the damping module according to claim 1 or 2 based on switching device series connection, it is characterised in that each described complete
The both ends of control type switching device are additionally provided with anti-paralleled diode.
4. the damping module according to claim 3 based on switching device series connection, it is characterised in that the full-controlled switch
Device is IGBT.
5. the damping module according to claim 3 based on switching device series connection, it is characterised in that also include control mould
Block, the control module control connect each full-controlled switch device.
6. the damping module according to claim 5 based on switching device series connection, it is characterised in that the control module is
Control card.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710936152.6A CN107732887A (en) | 2017-10-10 | 2017-10-10 | A kind of damping module based on switching device series connection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710936152.6A CN107732887A (en) | 2017-10-10 | 2017-10-10 | A kind of damping module based on switching device series connection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107732887A true CN107732887A (en) | 2018-02-23 |
Family
ID=61210100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710936152.6A Pending CN107732887A (en) | 2017-10-10 | 2017-10-10 | A kind of damping module based on switching device series connection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107732887A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104009446A (en) * | 2014-02-27 | 2014-08-27 | 南京南瑞继保电气有限公司 | Direct-current transmission protection device, current converter and protection method |
| CN203859676U (en) * | 2014-05-29 | 2014-10-01 | 国家电网公司 | Power unit module of power electronic converter |
| CN105471416A (en) * | 2014-08-29 | 2016-04-06 | 国家电网公司 | DC circuit breaker |
-
2017
- 2017-10-10 CN CN201710936152.6A patent/CN107732887A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104009446A (en) * | 2014-02-27 | 2014-08-27 | 南京南瑞继保电气有限公司 | Direct-current transmission protection device, current converter and protection method |
| CN203859676U (en) * | 2014-05-29 | 2014-10-01 | 国家电网公司 | Power unit module of power electronic converter |
| CN105471416A (en) * | 2014-08-29 | 2016-04-06 | 国家电网公司 | DC circuit breaker |
Non-Patent Citations (2)
| Title |
|---|
| 苗荻: "中小功率IGBT逆变器过电压保护电路的设计", 《研究与设计》 * |
| 马焕: "含桥臂阻尼的MMC-HVDC直流双极短路故障机理分析", 《电网技术》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104052026B (en) | For submodule topology and the application thereof of modularization multi-level converter | |
| CN110867884B (en) | Energy consumption module, offshore wind power flexible direct current outgoing system and fault ride-through strategy | |
| CN103986342B (en) | A kind of power electronics inverter that can remove bi-directional failure electric current and control method | |
| US20200076321A1 (en) | Charging method for sub-module based hybrid converter | |
| CN107689739A (en) | A kind of restructural MMC submodule units and its control unit | |
| US10141743B2 (en) | Bipolar VSC-HVDC and UPFC hybrid topology and an operation method thereof | |
| CN103078400A (en) | Bridge arm collecting protection system suitable for high-capacity MMC (Multi Media Controller) flexible direct-current power transmission system | |
| CN106786713A (en) | A kind of voltage source converter unit topological structure and control method | |
| CN104078994A (en) | Modularized multi-lever converter with direct-current fault ride-through capacity | |
| CN103066805A (en) | Capacitor voltage balance control method based on bundling type switching of multiple sub modules | |
| WO2019096048A1 (en) | Method and system for controlling energy consumption means of converter | |
| CN103001242A (en) | HVDC (high voltage direct current controller) and UPFC (unified power flow controller) system based on modularized multi-level converter | |
| CN104426405A (en) | Modular multi-electric-level current converter and converter valve module unit thereof | |
| CN106160545A (en) | A kind of brachium pontis hybrid bipolar modular multi-level converter | |
| CN107749615B (en) | It is a kind of based on the dc circuit breaker for sealing in capacitor and its DC Line Fault processing strategie | |
| CN210744737U (en) | Modular submodule topology of direct-current energy discharge device | |
| CN109193638A (en) | A kind of service restoration method after the power distribution network calamity based on path search algorithm | |
| CN203745937U (en) | Device for distributing currents of multipath power sources at will | |
| CN107732887A (en) | A kind of damping module based on switching device series connection | |
| CN106998151A (en) | Multilevel converter based on asymmetric Shuangzi module and half-bridge submodule | |
| CN103986137B (en) | Novel self fault recovery system of multifunctional current limiter and control method of novel self fault recovery system | |
| CN208241326U (en) | A kind of extra-high voltage flexible direct-current transmission converter device | |
| CN203166539U (en) | HVDC and UPFC system based on modularized multilevel converter | |
| CN202535087U (en) | Unified power flow controller based on modular multilevel converter structure | |
| CN109449902A (en) | A kind of multiport direct current limiter for flexible direct current electric network fault current limliting |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180223 |