CN103746575A - Modular multilevel current converter module redundant configuration circuit and control method thereof - Google Patents
Modular multilevel current converter module redundant configuration circuit and control method thereof Download PDFInfo
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- CN103746575A CN103746575A CN201410012271.9A CN201410012271A CN103746575A CN 103746575 A CN103746575 A CN 103746575A CN 201410012271 A CN201410012271 A CN 201410012271A CN 103746575 A CN103746575 A CN 103746575A
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Abstract
The invention discloses a modular multilevel current converter module redundant configuration circuit and a control method thereof. The circuit comprises working circuits and redundant circuits, which share a direct-current voltage stabilization capacitor, wherein the wire inlet ends of the working circuits are connected with the wire inlet ends of the redundant circuits through switches; the working circuits and the redundant circuits are common submodule power circuits. According to the modular multilevel current converter module redundant configuration circuit, the working circuits and the redundant circuits share the same direct-current voltage stabilization capacitor; each redundant circuit saves a capacitor, so that a plurality of capacitors can be effectively saved along with the increase of the number of the redundant circuits; the hardware cost is reduced, and resource configuration is optimized; meanwhile, the modular multilevel current converter module redundant configuration circuit can work in three working modes; when part of devices of the working circuits are faulted, the rest of the devices can still continue to work; therefore the utilization rate of the devices and the reliability of a system are effectively improved.
Description
Technical field
The invention belongs to Technology of HVDC based Voltage Source Converter field, relate to a kind of modularization multi-level converter module redundancy configuration circuit and control method thereof.
Background technology
Technology of HVDC based Voltage Source Converter is a kind of VSC-HVDC (HVDC) technology based on voltage-source type converter, along with the extensive use of HVDC (High Voltage Direct Current) transmission system, make Technology of HVDC based Voltage Source Converter obtain paying close attention to widely, obtain at present a lot of achievements, and then also promoted the fast development of HVDC (High Voltage Direct Current) transmission system.Modular multilevel (MMC) technology, as a kind of novel many level topological structure, relies on the advantage of its structure, in Technology of HVDC based Voltage Source Converter field, has good application prospect.The main topology of tradition multilevel converter has following three kinds: diode clamp type, capacitor clamper type and H bridge cascade connection type.Diode clamp type needs a large amount of clamp diodes, DC voltage equalization problem complexity; Capacitor clamper type needs a large amount of capacitors, converter control complexity.The level expansion difficulty of these two kinds of topological structures is large, is difficult to be applicable to high pressure occasion.H bridge cascade connection type topology is the main flow structure in the outer many level of Now Domestic field, and this topology expansion flexibly, does not exist capacitor voltage-sharing, has stability and the reliability of height.But in high-pressure frequency-conversion field, this topology need to adopt phase shifting transformer, and manufacture difficulty, cost, volume increase greatly, also limited to a certain extent the further application of H bridge cascade connection type topology.Modular multilevel technology, has overcome the shortcoming of traditional multilevel converter, by the advantage of its topological structure, high modularization, integrated level is high, expands easily, and Redundancy Design is simple, without auxiliary be all installed with standby, reduce control complexity, improved the reliability of system, optimized hardware cost.Therefore, modular multilevel technology is paid close attention to widely in Technology of HVDC based Voltage Source Converter field, has huge application prospect.
Technology of HVDC based Voltage Source Converter is to be mainly applied in HVDC (High Voltage Direct Current) transmission system, and long-term, stable operation is the key of this technology.The core of this technology is exactly modular multilevel technology, how to guarantee that working normally, reliably of modularization multi-level converter module will be an important problem.In fact, along with the increase of modularization multi-level converter module number, the lengthening of service time, the damage of module device can not be unavoidably, how, after module damage, can also make modularization multi-level converter continue normal work, otherwise will affect electrical power trans mission/distribution system, electrical network is caused damage, and therefore this is a very crucial problem.Under background, the thought of module redundancy is just arisen at the historic moment again, by the redundant module of configuration some, after certain module damages, drops into immediately redundant module, thus the normal operation of the system of assurance.But the selection of module redundancy quantity becomes again a difficult problem, the configuration of redundant module quantity is more, and system reliability is higher, but cost is higher, and redundant module utilance is poor, uneconomical; The configuration of redundant module quantity is fewer, and cost is lower, but the reliability of system can not get ensureing.Therefore, rationally effectively configuration module redundancy quantity just becomes very important.But, not concrete, effective module redundancy collocation method at present.
For the collocation method of module redundancy quantity, current in Technology of HVDC based Voltage Source Converter field, be mainly according to conservatism, incorporation engineering experience and actual conditions are selected module redundancy quantity.At present, the Research on configuration of module redundancy quantity is less, and pertinent literature is few, and pertinent literature has provided the probable ranges of module redundancy quantity, but still needs to select in conjunction with practical engineering experience.In existing module redundancy configuration, redundant module structure remains unchanged, each module consists of two power switchs, two anti-paralleled diodes and a capacitor, but consider that capacitor is not fragile, reliability, far away higher than power switch and diode, the invention provides a kind of modularization multi-level converter module redundancy configuration circuit based on common DC voltage regulation capacitor.This circuit, by operating circuit and redundant circuit common DC voltage regulation capacitor, is effectively saved a capacitor, can also work in three kinds of mode of operations, has improved greatly the reliability of system.
Summary of the invention
technical problem:in order to overcome the shortcoming of above-mentioned prior art, the invention provides a kind of effective saving capacitor, improved the modularization multi-level converter module redundancy configuration circuit of system reliability, a kind of faulty circuit method for handover control is provided simultaneously.
technical scheme:modularization multi-level converter module redundancy configuration circuit of the present invention, comprise operating circuit and the redundant circuit of common DC voltage regulation capacitor, the end of incoming cables of operating circuit is connected by switch with the end of incoming cables of redundant circuit, and operating circuit and redundant circuit are common submodule power circuit.
In modularization multi-level converter module redundancy configuration circuit of the present invention, operating circuit comprises the first switch, the first single tube power module, second single tube power module and the second switch of forward series connection successively, between the first single tube power module and the second single tube power module, is end of incoming cables;
Redundant circuit comprises the 3rd switch, the 3rd single tube power module, the 4th single tube power module and the 4th switch of forward series connection successively, between the 3rd single tube power module and the 4th single tube power module, is end of incoming cables; The end of incoming cables of redundant circuit is connected with the end of incoming cables of operating circuit by the 5th switch;
The first single tube power module of operating circuit is connected with the positive pole of DC voltage-stabilizing capacitor by the first switch, the second single tube power module is connected with the negative pole of DC voltage-stabilizing capacitor by second switch, the 3rd single tube power module of redundant circuit is connected with the positive pole of DC voltage-stabilizing capacitor by the 3rd switch, and the 4th single tube power module is connected with the negative pole of DC voltage-stabilizing capacitor by the 4th switch.
Method of carrying out faulty circuit switching controls based on above-mentioned modularization multi-level converter module redundancy configuration circuit of the present invention, specifically comprises:
When only having the first single tube power module failure, disconnect the first switch, conducting the 3rd switch and the 5th switch;
When only having the second single tube power module failure, disconnect second switch, conducting the 4th switch and the 5th switch;
When the first single tube power module and the second single tube power module simultaneous faults, disconnect the first switch and second switch, conducting the 3rd switch, the 4th switch and the 5th switch.
beneficial effect:compared with prior art, the present invention has the following advantages:
1. module redundancy configuration circuit provided by the present invention is connected common DC voltage regulation capacitor with redundant circuit by switch by operating circuit, but traditional module redundancy configuration circuit is all generally to adopt two identical circuit, one as operating circuit, and another one is as redundant circuit.First, public direct current voltage regulation capacitor of the present invention, can effectively save a capacitor, along with the increase of redundant circuit quantity, can effectively save multiple capacitors, greatly saves hardware cost, optimizes allocation of resources; Secondly, during tradition redundant configuration circuit working, when the part of devices fault of operating circuit, will be switched to redundant circuit, in operating circuit, remaining device cannot be worked, the present invention has overcome this point, because operating circuit and redundant circuit reasonably join by switch, even part device fault in operating circuit, remaining device still can work on together with the device in redundant circuit, so just greatly improve the utilance of device, improved reliability and the operating efficiency of system; Finally, during tradition redundant configuration fault, because operating circuit and redundant circuit are what to separate, generally the DC voltage-stabilizing capacitor in redundant circuit does not have voltage, and when redundant circuit is worked, DC voltage-stabilizing capacitor exists a capacitor charging process, extended dynamic time, due to common DC voltage regulation capacitor, naturally just there is not the charging process of DC voltage-stabilizing capacitor, thereby improved dynamic response and the stability of system in the present invention.
2. the faulty circuit method for handover control of module redundancy configuration circuit provided by the present invention, can be simple, effectively carry out faulty circuit switching, work in three kinds of mode of operations, mode of operation while being only respectively the first single tube power module failure, only mode of operation during the second single tube power module failure, mode of operation when the first single tube power module and the second single tube power module simultaneous faults, and conventional method can only work in a kind of pattern, as long as break down, just be switched to redundant module, faulty circuit method for handover control provided by the present invention is applied in module redundancy configuration circuit, when operational module part of devices fault, residue device still works on together with the device in redundant circuit, can effectively improve the utilance of device and the reliability of system.
Accompanying drawing explanation
Fig. 1 is the structure chart of the present invention's tradition individual module SM.
Fig. 2 is single tube power modular circuit structure chart of the present invention.
Fig. 3 is conventional module redundant configuration circuit structure diagram of the present invention.
Fig. 4 is module redundancy configuration circuit structure chart of the present invention.
Fig. 5 is module redundancy configuration circuit normal mode of operation of the present invention.
Fig. 6 is only mode of operation during the first single tube power module failure of module redundancy configuration circuit of the present invention.
Fig. 7 is only mode of operation during the second single tube power module failure of module redundancy configuration circuit of the present invention.
Mode of operation when Fig. 8 is module redundancy configuration circuit the first single tube power module of the present invention and the second single tube power module simultaneous faults.
In figure, have: the first single tube power module
v 1, the second single tube power module
v 2, the 3rd single tube power module
v 3, the 4th single tube power module
v 4, the first switch
s 1, second switch
s 2, the 3rd switch
s 3, the 4th switch
s 4, the 5th switch
s 5, DC voltage-stabilizing capacitor
c, insulated gate bipolar transistor
t, diode
d.
Embodiment
Below in conjunction with Figure of description and embodiment, the present invention will be further described.
Fig. 1 is the structure chart of the present invention's tradition individual module SM, and this circuit is by the first single tube power module
v 1, the second single tube power module
v 2with DC voltage-stabilizing capacitor
ccomposition.Fig. 2 is single tube power modular circuit structure chart of the present invention, and this circuit is by an insulated gate bipolar transistor
tand diode
dreverse parallel connection forms, i.e. insulated gate bipolar transistor
tcollector electrode and diode
dnegative pole connect, insulated gate bipolar transistor
temitter and diode
dpositive pole connect.
Fig. 3 is conventional module redundant configuration circuit structure diagram of the present invention, and this circuit consists of operational module and redundant module.When module is normally worked, conducting the first single tube power module
v 1with the 4th single tube power module
v 4, disconnect the second single tube power module
v 2with the 3rd single tube power module
v 3, operational module puts into operation; When module breaks down, conducting the second single tube power module
v 2with the 3rd single tube power module
v 3, disconnect the first single tube power module
v 1with the 4th single tube power module
v 4, redundant module puts into operation.
Fig. 4 is module redundancy configuration circuit structure chart of the present invention.This circuit comprises operating circuit and the redundant circuit of common DC voltage regulation capacitor, and the end of incoming cables of operating circuit is connected by switch with the end of incoming cables of redundant circuit, and operating circuit and redundant circuit are common submodule power circuit.
Operating circuit comprises the first switch of forward series connection successively
s 1, the first single tube power module
v 1, the second single tube power module
v 2and second switch
s 2, the first single tube power module
v 1with the second single tube power module
v 2between be end of incoming cables;
Redundant circuit comprises the 3rd switch of forward series connection successively
s 3, the 3rd single tube power module
v 3, the 4th single tube power module
v 4with the 4th switch
s 4, the 3rd single tube power module
v 3with the 4th single tube power module
v 4between be end of incoming cables; The end of incoming cables of redundant circuit is by the 5th switch
s 5be connected with the end of incoming cables of operating circuit;
The first single tube power module of operating circuit
v 1by the first switch
s 1with DC voltage-stabilizing capacitor
cpositive pole connect, the second single tube power module
v 2pass through second switch
s 2with DC voltage-stabilizing capacitor
cnegative pole connect, the 3rd single tube power module of redundant circuit
v 3by the 3rd switch
s 3with DC voltage-stabilizing capacitor
cpositive pole connect, the 4th single tube power module
v 4by the 4th switch
s 4with DC voltage-stabilizing capacitor
cnegative pole connect.
Fig. 5 is module redundancy configuration circuit normal mode of operation of the present invention.When module is normally worked, conducting the first single tube power module
v 1with the second single tube power module
v 2, disconnect the 3rd single tube power module
v 3, the 4th single tube power module
v 4with the 5th single tube power module
v 5.
Fig. 6 is only mode of operation during the first single tube power module failure of module redundancy configuration circuit of the present invention.When only there being the first single tube power module
v 1during fault, disconnect the first switch
s 1, conducting the 3rd switch
s 3with the 5th switch
s 5; Fig. 7 is only mode of operation during the second single tube power module failure of module redundancy configuration circuit of the present invention.When only there being the second single tube power module
v 2during fault, disconnect second switch
s 2, conducting the 4th switch
s 4with the 5th switch
s 5; Mode of operation when Fig. 8 is module redundancy configuration circuit the first single tube power module of the present invention and the second single tube power module simultaneous faults.When the first single tube power module
v 1with the second single tube power module
v 2during simultaneous faults, disconnect the first switch
s 1and second switch
s 2, conducting the 3rd switch
s 3, the 4th switch
s 4with the 5th switch
s 5.
The invention provides a kind of modularization multi-level converter module redundancy configuration circuit and control method thereof.This circuit is connected common DC voltage regulation capacitor with redundant circuit by switch by operating circuit, each redundant circuit is saved a capacitor, along with the increase of redundant circuit quantity, can effectively save multiple capacitors, reduce hardware cost and optimize allocation of resources, can also work in three kinds of mode of operations, when operating circuit part of devices fault simultaneously, residue device can also work on, and has effectively improved the utilance of device and the reliability of system.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (3)
1. a modularization multi-level converter module redundancy configuration circuit, it is characterized in that, this circuit comprises operating circuit and the redundant circuit of common DC voltage regulation capacitor, the end of incoming cables of described operating circuit is connected by switch with the end of incoming cables of redundant circuit, and described operating circuit and redundant circuit are common submodule power circuit.
2. modularization multi-level converter module redundancy configuration circuit according to claim 1, is characterized in that, described operating circuit comprise the series connection of forward successively the first switch (
s 1), the first single tube power module (
v 1), the second single tube power module (
v 2) and second switch (
s 2), described the first single tube power module (
v 1) and the second single tube power module (
v 2) between be end of incoming cables;
Described redundant circuit comprise the series connection of forward successively the 3rd switch (
s 3), the 3rd single tube power module (
v 3), the 4th single tube power module (
v 4) and the 4th switch (
s 4), the 3rd single tube power module (
v 3) and the 4th single tube power module (
v 4) between be end of incoming cables; The end of incoming cables of redundant circuit by the 5th switch (
s 5) be connected with the end of incoming cables of operating circuit;
The first single tube power module of operating circuit (
v 1) by the first switch (
s 1) and DC voltage-stabilizing capacitor (
c) positive pole connect, the second single tube power module (
v 2) by second switch (
s 2) and DC voltage-stabilizing capacitor (
c) negative pole connect, the 3rd single tube power module of redundant circuit (
v 3) by the 3rd switch (
s 3) and DC voltage-stabilizing capacitor (
c) positive pole connect, the 4th single tube power module (
v 4) by the 4th switch (
s 4) and DC voltage-stabilizing capacitor (
c) negative pole connect.
3. a method of carrying out faulty circuit switching controls based on modularization multi-level converter module redundancy configuration circuit described in claim 1 or 2, is characterized in that, the method specifically comprises:
When only have the first single tube power module (
v 1) during fault, disconnect the first switch (
s 1), conducting the 3rd switch (
s 3) and the 5th switch (
s 5);
When only have the second single tube power module (
v 2) during fault, disconnect second switch (
s 2), conducting the 4th switch (
s 4) and the 5th switch (
s 5);
When the first single tube power module (
v 1) and the second single tube power module (
v 2) during simultaneous faults, disconnect the first switch (
s 1) and second switch (
s 2), conducting the 3rd switch (
s 3), the 4th switch (
s 4) and the 5th switch (
s 5).
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| CN201410012271.9A CN103746575A (en) | 2014-01-13 | 2014-01-13 | Modular multilevel current converter module redundant configuration circuit and control method thereof |
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|---|---|---|---|
| CN201410012271.9A CN103746575A (en) | 2014-01-13 | 2014-01-13 | Modular multilevel current converter module redundant configuration circuit and control method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018024207A1 (en) * | 2016-08-05 | 2018-02-08 | 南京南瑞继保电气有限公司 | Reconfigurable mmc sub-module unit and control unit thereof |
| WO2021083501A1 (en) * | 2019-10-30 | 2021-05-06 | Abb Schweiz Ag | Condition monitoring of semiconductor devices in a converter |
| CN114137822A (en) * | 2021-11-01 | 2022-03-04 | 北京四方继保自动化股份有限公司 | 4 ~ 20mA current redundancy output conversion circuit |
| CN114553020A (en) * | 2022-04-27 | 2022-05-27 | 华北电力大学（保定） | Capacitor multiplexing type modular multilevel converter and control method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203645567U (en) * | 2014-01-08 | 2014-06-11 | 东南大学 | Modular multi-level converter module redundancy configuration circuit |
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2014
- 2014-01-13 CN CN201410012271.9A patent/CN103746575A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203645567U (en) * | 2014-01-08 | 2014-06-11 | 东南大学 | Modular multi-level converter module redundancy configuration circuit |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018024207A1 (en) * | 2016-08-05 | 2018-02-08 | 南京南瑞继保电气有限公司 | Reconfigurable mmc sub-module unit and control unit thereof |
| US10523131B2 (en) | 2016-08-05 | 2019-12-31 | Nr Electric Co., Ltd | Reconfigurable MMC sub-module unit and control unit thereof |
| WO2021083501A1 (en) * | 2019-10-30 | 2021-05-06 | Abb Schweiz Ag | Condition monitoring of semiconductor devices in a converter |
| CN114137822A (en) * | 2021-11-01 | 2022-03-04 | 北京四方继保自动化股份有限公司 | 4 ~ 20mA current redundancy output conversion circuit |
| CN114137822B (en) * | 2021-11-01 | 2024-05-10 | 北京四方继保自动化股份有限公司 | 4-20 MA current redundant output conversion circuit |
| CN114553020A (en) * | 2022-04-27 | 2022-05-27 | 华北电力大学（保定） | Capacitor multiplexing type modular multilevel converter and control method thereof |
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Application publication date: 20140423 |