CN104079153A - Method for improving dynamic response of serial chain type convertor device - Google Patents
Method for improving dynamic response of serial chain type convertor device Download PDFInfo
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- CN104079153A CN104079153A CN201310109779.6A CN201310109779A CN104079153A CN 104079153 A CN104079153 A CN 104079153A CN 201310109779 A CN201310109779 A CN 201310109779A CN 104079153 A CN104079153 A CN 104079153A
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Abstract
The invention discloses a method for improving dynamic response of a serial chain type convertor device. Convertor device topology based on serial modules adopts at least two serial modules sequentially connected in series. The serial modules in a whole topological structure serve as redundancy modules sequentially and cyclically to be subjected to bypass processing. A valve-based control device issues a bypass instruction to serial module internal control panels of one or more modules, and the serial module internal control panels directly control controllable device pulses of the serial modules and enable the modules to be in a bypass state and used for redundancy standby. After a period of time is spaced, the valve-based control device retrieves the bypass instruction sent to the modules and issues the bypass instruction to the serial module internal control panels of one or more modules to achieve sequential displacement cyclic redundancy. By adopting the method, the reliability and dynamic response performance of the serial chain type convertor device can be met, the method is simple in control, and current impact on the device of system voltage is avoided.
Description
Technical field
The invention belongs to Electric Power Automation Equipment control technology field, particularly a kind of method that adopts cyclic redundancy technology to improve series connection chain type convertor equipment dynamic response.
Background technology
In the convertor equipment topology of serial module structure, such as chain static synchronous compensator, the many level current transformers of half-bridge moduleization, full-bridge modular multi-level converter, cascade connection type two level/many level current transformers etc., in order to improve equipment operational reliability, at least one redundant module is set conventionally, these modules when normal work in bypass condition, on the not impact of equipment operational mode, when certain module of series connection breaks down, redundant module is dropped into, malfunctioning module bypass, realized the excision of fault.
Under traditional redundant mode, the control of redundant module is adopted to static mode, selected redundant module is all the time in bypass condition, although can be by the multiple normal receiving and transmitting signal that can guarantee this module of getting, but control circuit, drive circuit and power device are for a long time in same operating mode, easily cause device aging and stress fatigue, reduced equipment operational reliability.
Under traditional redundant mode, redundant module is for a long time in bypass condition, its DC capacitor voltage is zero, the control power supply of this module cannot obtain from self, must obtain from other modules, makes the dissymmetrical load of serial module structure, aggravated the imbalance of serial module structure voltage, must in control, be processed, increased the complexity of controlling, reduced robustness.
Under traditional redundant mode, redundant module DC capacitor voltage is zero, when other module failures, redundant module is dropped into, now because redundant module direct voltage is zero, thereby the output of the voltage source of equivalence has a breach, can cause the rush of current of system voltage to equipment, and then there will be the toning of direct voltage, be unfavorable for device security.
Given this, the inventor proposes a kind of method that adopts cyclic redundancy technology to improve series connection chain type convertor equipment dynamic response, and this case produces thus.
Summary of the invention
Object of the present invention, is to provide a kind of method that improves series connection chain type convertor equipment dynamic response, and it can meet reliability and the dynamic response performance of series connection chain type convertor equipment, controls simply, and has avoided the rush of current of system voltage to equipment.
In order to reach above-mentioned purpose, solution of the present invention is:
A kind of method that improves series connection chain type convertor equipment dynamic response, convertor equipment topology based on serial module structure, described topology comprises at least 2 serial module structures of serial connection successively, each serial module structure includes 4 switching tubes, a DC capacitor and a discharge resistance, the emitter of the first switching tube connects the collector electrode of the 3rd switching tube, the emitter of second switch pipe connects the collector electrode of the 4th switching tube, and first, the collector electrode of two switching tubes connects the positive pole of DC capacitor jointly, the negative pole of DC capacitor connects respectively the 3rd, the emitter of four switching tubes, described discharge resistance is attempted by the two ends of DC capacitor, the tie point of described first and third switching tube is drawn a terminal as the input of serial module structure, the second, the tie point of four switching tubes is drawn a terminal as the output of serial module structure, and described each serial module structure is linked in sequence and forms the convertor equipment topology based on serial module structure, serial module structure in whole topological structure is circulated successively as redundant module, carry out bypass processing: valve base control device issues bypass order to the serial module structure internal control plate of wherein one or more modules, serial module structure internal control plate is directly controlled the controllable devices pulse of serial module structure, makes this module standby in bypass condition, redundancy, after certain interval of time, valve base control device is regained and is issued the bypass order of this module, and issues bypass order to the serial module structure internal control plate of next or a plurality of modules, realizes shift cycle redundancy successively.
Above-mentioned interval time, span was 0.1ms～200ms.
Switching tube in above-mentioned each serial module structure adopts controlled shutoff device or bidirectional thyristor.
Adopt after such scheme, the present invention makes serial module structure in turn in redundant state, control simple, whole impact and the overshoot problem having solved when redundant module drops into, avoid the redundant module unreliability in static stand-by state for a long time, improve series connection chain type convertor equipment operational reliability and dynamic response performance, and avoided the rush of current of system voltage to equipment.The present invention goes for all topological structures that contain serial module structure, comprise chain static synchronous compensator, the many level current transformers of half-bridge moduleization, full-bridge modular multi-level converter, cascade connection type two level/many level current transformers etc., the basic structure because of module does not change; And be applicable to comprise the application of various capacity, various electric pressures, comprise and be not limited to 6kV, 10kV, 20kV, 33kV, 66kV, 110kV, 220kV, 330kV, 500kV electric pressure, can meet the Redundant Control needs of the chain type cascaded structure of different scales, different electric pressures, do not increase equipment cost, control performance optimization is obvious.
Accompanying drawing explanation
Fig. 1 is cyclic redundancy scheme pulse cycle schematic diagram provided by the invention;
Fig. 1 (a) is the structural representation of single serial module structure;
Fig. 2 is optimal PWM sequential chart provided by the invention;
Fig. 3 is that cyclic redundancy is controlled lower redundant instruction and voltage oscillogram;
Wherein, the abscissa of 3 subgraphs is consistent, is all time shaft, unit: ms; The ordinate of first subgraph (a) is serial module structure number, without unit; The ordinate of second subgraph (b) is the direct voltage of A phase 1# module, unit: V; The ordinate of the 3rd subgraph is A phase module operation total voltage, unit: V;
Fig. 4 is the dynamic response figure that cyclic redundancy is controlled lower failure bypass;
Wherein, the abscissa of 3 subgraphs is consistent, is all time shaft, unit: ms; The ordinate of first subgraph (a) is module direct voltage perunit value, without unit; The ordinate of second subgraph (b) be the alternating voltage of series connection chain type convertor equipment access point and electric current without value of symbol, without unit; The ordinate of the 3rd subgraph is meritorious/reactive power, unit: MVA.
Embodiment
Below with reference to accompanying drawing, technical scheme of the present invention is elaborated.
The invention provides a kind of method that improves series connection chain type convertor equipment dynamic response, the present invention is based on the convertor equipment topology of serial module structure, comprise at least 2 serial module structures of serial connection successively, shown in Fig. 1 (a), be the structural representation of serial module structure, described each serial module structure includes 4 switching tubes, a DC capacitor C and a discharge resistance R, described switching tube can adopt controlled shutoff device (IGBT) or bidirectional thyristor, in figure, adopt 4 IGBT T1-T4, the emitter of described T1 connects the collector electrode of T3, the emitter of T2 connects the collector electrode of T4, and the collector electrode of T1 and T2 is connected the positive pole of DC capacitor C jointly, the negative pole of DC capacitor C connects respectively the emitter of T3 and T4, described discharge resistance R is attempted by the two ends of DC capacitor C.The tie point of described T1 and T3 is drawn a terminal as the input of serial module structure, the tie point of T2 and T4 is drawn a terminal as the output of serial module structure, the output of described each serial module structure is connected with the input of rear adjacent serial module structure successively, der group becomes cascaded structure, forms the convertor equipment topology based on serial module structure.
Improvement of the present invention is: the serial module structure in whole topological structure is circulated successively as redundant module, carry out bypass processing: valve base control device issues bypass order to the serial module structure internal control plate of wherein one or more modules, serial module structure internal control plate is directly controlled the controllable devices pulse of serial module structure, makes this module standby in bypass condition, redundancy; After certain interval of time, valve base control device is regained and is issued the bypass order of this module, and issues bypass order to the serial module structure internal control plate of next or a plurality of modules, realizes shift cycle redundancy successively.
Redundant module in whole topological structure is in dynamic circulation, rather than certain fixing module.Utilize control device directly to issue the pulse of cyclic shift, directly control a plurality of controllable devices of serial module structure.
Above-mentioned interval time, span was 0.1ms～200ms.Because interval time is very short, the direct voltage of each module remains on controlling value, thereby has improved the device security reliability of convertor equipment.
Above-mentioned serial module structure is the elementary cell of chain static synchronous compensator under each electric pressure.
In Fig. 1, the basic structure of each serial module structure is comprised of 4 IGBT (T1～T4), 1 DC capacitor C, 1 discharge resistance R and internal control plate, take and be applied to 10kV system as example, the A number of modules that is in series is 12, wherein redundant module is 1, and Ga1～Ga12 is the be in series driving signal of module of A.Suppose that current redundant module is 12#, now 1#～11# module is carried out phase shift modulation according to sine wave, and 12# module drive is bypass pulse, and T1 and T2 conducting, do not discharge and recharge electric current electric capacity.Through one circulation timei interval T, span is at 0.1ms～200ms, redundant instruction is circulated to 1# module, now 2#～12# module is carried out phase shift modulation according to sine wave, the direct voltage of 1# module discharges via discharge resistance R, because discharge time constant is far longer than interval T circulation timei, so the essentially no variation of the direct voltage of redundant module.
In Fig. 2, the A that has listed 10kV system is each serial module structure optimal PWM sequential mutually, and in figure, t0 represents arbitrary initial time, and Ts represents switching frequency, and adopting phase shift carrier Control mode Ts/22 is basic phase shift interval time, and T represents interval circulation timei.#A1 module does not have time delay in t0 pulse constantly, 1 of #A2 module time delay phase shift interval time, 12*1 of #A12 module time delay phase shift interval time, when next circulation timei, interval T arrived, the phase shift time interval adds 1, be #A1 module in t0+T 1 of pulse delay phase shift constantly interval time, 2 of #A2 module time delays phase shift interval time, 0 of #A12 module time delay phase shift interval time.By that analogy, through 12 circulation timei interval T complete A each serial module structure optimal PWM mutually.
In Fig. 3, the static reacance generator of having listed 10kV absorbs the RTDS result of the test of 6Mvar under cyclic redundancy is controlled, and a) has shown the track of A phase cyclic redundancy module numbering, and 12 serial module structures enter redundancy bypass condition successively; B) shown the now DC voltage fluctuation situation of A phase 1# module, when the bypass of 1# module redundancy (in corresponding a, numerical value is zero one section), this module voltage is constant, as scheme the part of level in b, 1# module is in running order constantly for all the other, there is discharging and recharging of electric capacity, the interchange pulsation of the 100Hz that superposes on direct voltage; C) shown A mutually all the voltage of modules and, can find that voltage and value are also that the 100Hz that superposes on direct voltage exchanges pulsation, the fluctuation that appearance suddenlys change, meets the control needs under normal mode completely.
In Fig. 4, list the static reacance generator of 10kV and at cyclic redundancy, controlled the RTDS result of the test that issues 10Mvar, A phase 1# module failure during 500ms, a) has shown that 1# module direct voltage is because bypass starts to decline, the still follow current fluctuation of all the other module direct voltages; B) shown that the voltage and current of equipment output is undistorted before and after fault, do not occurred the phenomenon of rush of current; C) show the meritorious and idle of fault front and back equipment outputs, do not occurred unusual fluctuations.
Fig. 3 and Fig. 4 explanation, a kind of method that adopts cyclic redundancy technology to improve series connection chain type convertor equipment dynamic response provided by the invention, whole impact and the overshoot problem having solved when redundant module drops into, improve equipment operation state response performance, and avoided the rush of current of system voltage to equipment.
Finally should be noted that: in conjunction with above-described embodiment, only illustrate that technical scheme of the present invention is not intended to limit.Those of ordinary skill in the field are to be understood that: those skilled in the art can modify or be equal to replacement the specific embodiment of the present invention, but among the claim protection range that these modifications or change are all awaited the reply in application.
Above embodiment only, for explanation technological thought of the present invention, can not limit protection scope of the present invention with this, every technological thought proposing according to the present invention, and any change of doing on technical scheme basis, within all falling into protection range of the present invention.
Claims (3)
1. a method that improves series connection chain type convertor equipment dynamic response, convertor equipment topology based on serial module structure, described topology comprises at least 2 serial module structures of serial connection successively, each serial module structure includes 4 switching tubes, a DC capacitor and a discharge resistance, the emitter of the first switching tube connects the collector electrode of the 3rd switching tube, the emitter of second switch pipe connects the collector electrode of the 4th switching tube, and first, the collector electrode of two switching tubes connects the positive pole of DC capacitor jointly, the negative pole of DC capacitor connects respectively the 3rd, the emitter of four switching tubes, described discharge resistance is attempted by the two ends of DC capacitor, the tie point of described first and third switching tube is drawn a terminal as the input of serial module structure, the second, the tie point of four switching tubes is drawn a terminal as the output of serial module structure, and described each serial module structure is linked in sequence and forms the convertor equipment topology based on serial module structure, it is characterized in that: the serial module structure in whole topological structure is circulated successively as redundant module, carry out bypass processing: valve base control device issues bypass order to the serial module structure internal control plate of wherein one or more modules, serial module structure internal control plate is directly controlled the controllable devices pulse of serial module structure, makes this module standby in bypass condition, redundancy, after certain interval of time, valve base control device is regained and is issued the bypass order of this module, and issues bypass order to the serial module structure internal control plate of next or a plurality of modules, realizes shift cycle redundancy successively.
2. a kind of method that improves series connection chain type convertor equipment dynamic response as claimed in claim 1, is characterized in that: described interval time, span was 0.1ms～200ms.
3. a kind of method that improves series connection chain type convertor equipment dynamic response as claimed in claim 1, is characterized in that: the switching tube in described each serial module structure adopts controlled shutoff device or bidirectional thyristor.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109004814A (en) * | 2018-08-13 | 2018-12-14 | 南昌工程学院 | A kind of submodule capacitor voltage balance control system for MMC |
| CN109039124A (en) * | 2018-08-13 | 2018-12-18 | 南昌工程学院 | MMC capacitance voltage balance control method based on phase shift space vector modulation |
| US10928450B2 (en) | 2017-01-25 | 2021-02-23 | General Electric Company | Circuit protection system and method |
| CN114094834A (en) * | 2021-10-29 | 2022-02-25 | 深圳供电局有限公司 | Switched capacitor access type direct current transformer and control method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101268606A (en) * | 2005-09-21 | 2008-09-17 | 西门子公司 | Control process for redundancy use in the event of a fault of a polyphase power converter having distributed energy stores |
| CN102256410A (en) * | 2010-04-16 | 2011-11-23 | 凹凸电子（武汉）有限公司 | Controllers, systems and methods for implementing multi-phase control to light source |
| AU2011202980A1 (en) * | 2010-06-29 | 2012-01-19 | Ge Grid Solutions Llc | Solar power generation system and method |
| CN102522749A (en) * | 2011-11-10 | 2012-06-27 | 中冶华天工程技术有限公司 | H-bridge cascaded active power filter and control method thereof |
| CN102709986A (en) * | 2012-06-20 | 2012-10-03 | 成都信息工程学院 | Technology for cyclical activation of series-connected storage battery group and redundant backup of storage batteries |
| CN102801295A (en) * | 2012-08-09 | 2012-11-28 | 株洲变流技术国家工程研究中心有限公司 | Fault protection circuit and method for submodule of modular multilevel converter |
-
2013
- 2013-03-29 CN CN201310109779.6A patent/CN104079153B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101268606A (en) * | 2005-09-21 | 2008-09-17 | 西门子公司 | Control process for redundancy use in the event of a fault of a polyphase power converter having distributed energy stores |
| CN102256410A (en) * | 2010-04-16 | 2011-11-23 | 凹凸电子（武汉）有限公司 | Controllers, systems and methods for implementing multi-phase control to light source |
| AU2011202980A1 (en) * | 2010-06-29 | 2012-01-19 | Ge Grid Solutions Llc | Solar power generation system and method |
| CN102522749A (en) * | 2011-11-10 | 2012-06-27 | 中冶华天工程技术有限公司 | H-bridge cascaded active power filter and control method thereof |
| CN102709986A (en) * | 2012-06-20 | 2012-10-03 | 成都信息工程学院 | Technology for cyclical activation of series-connected storage battery group and redundant backup of storage batteries |
| CN102801295A (en) * | 2012-08-09 | 2012-11-28 | 株洲变流技术国家工程研究中心有限公司 | Fault protection circuit and method for submodule of modular multilevel converter |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10928450B2 (en) | 2017-01-25 | 2021-02-23 | General Electric Company | Circuit protection system and method |
| CN109004814A (en) * | 2018-08-13 | 2018-12-14 | 南昌工程学院 | A kind of submodule capacitor voltage balance control system for MMC |
| CN109039124A (en) * | 2018-08-13 | 2018-12-18 | 南昌工程学院 | MMC capacitance voltage balance control method based on phase shift space vector modulation |
| CN109004814B (en) * | 2018-08-13 | 2020-03-24 | 南昌工程学院 | Submodule capacitor voltage balance control system for MMC |
| CN109039124B (en) * | 2018-08-13 | 2020-06-09 | 南昌工程学院 | MMC capacitor voltage balance control method based on phase-shift space vector modulation |
| CN114094834A (en) * | 2021-10-29 | 2022-02-25 | 深圳供电局有限公司 | Switched capacitor access type direct current transformer and control method thereof |
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