CN108631351A - A kind of the reason of DC transmission system commutation failure analysis method - Google Patents
A kind of the reason of DC transmission system commutation failure analysis method Download PDFInfo
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- CN108631351A CN108631351A CN201810405046.XA CN201810405046A CN108631351A CN 108631351 A CN108631351 A CN 108631351A CN 201810405046 A CN201810405046 A CN 201810405046A CN 108631351 A CN108631351 A CN 108631351A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
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Abstract
A kind of the reason of the invention discloses DC transmission system commutation failures analysis method.Factors such as the reason of existing research is to the causing commutation failure more unilateral or simple analysis voltage amplitude decline of analysis, phase shift, or ignore the analysis of reason and lay particular emphasis on the simulation study of control strategy, or directly analyze influencing each other between more drop point transmission systems.The present invention overcomes the previous commutation failure analysis of causes not comprehensively, the more unilateral disadvantage of single-order piecewise analysis, cannot such as consider the generation of secondary commutation failure, ignore the influence etc. of harmonic wave and converter transformer DC magnetic bias.Commutation failure process in AC and DC combined hybrid system is divided into two different phases by the present invention, and in different phase, for causing commutation failure the main reason for is analyzed, and the operation stability of interacted system is realized when AC/DC interconnected system breaks down.
Description
Technical field
The invention belongs to DC transmission system operation and control field, specifically a kind of DC transmission system commutation is lost
The reason of losing analysis method.
Background technology
China's energy resources can be effectively relieved in the successful application of alternating current-direct current combined hybrid system and load center distribution is uneven
The case where, while the synchronization sex chromosome mosaicism of AC system connection is also not present, the safety of operation of power networks is improved, but direct current is defeated
Electrical engineering is also faced with some inevitable problems.
The commutation failure of transverter is a kind of very common fault type, to the exchange of DC transmission system and both sides
Transmission system all brings unpredictable damage and influence.The reason of existing research is to causing commutation failure analysis is more unilateral,
Or the factors such as simple analysis voltage amplitude decline, phase shift, or ignore the analysis of reason and lay particular emphasis on the emulation of control strategy
Research, or directly analyze influencing each other between more drop point transmission systems.
Invention content
The technical problem to be solved by the present invention is to overcoming the problems of the above-mentioned prior art, provide it is a kind of stage by stage
The analysis method of straight-flow system commutation failure reason realizes the operation of interacted system when AC/DC interconnected system breaks down
Stability.
For this purpose, the present invention adopts the following technical scheme that：A kind of the reason of DC transmission system commutation failure analysis method,
Commutation failure process in AC and DC combined hybrid system is divided into two different phases by it, in different phase, to causing commutation failure
The main reason for analyzed, include the following steps：
1) the direct current transportation CIGRE International standardization models of 500kV, 1000MW are established in PSCAD softwares；In inverter side
Different electric faults is arranged in ac bus exit, is cut off after continuing the identical time, commutation is turned to the change at blow-out angle
The basis for estimation of failure；The nothing that ac bus voltage, DC current, blow-out angle, DC line transmit before and after observation fault setting
Work(, active power, the relationship of qualitative analysis these variables and commutation failure；
2) interface between PSCAD softwares and MATLAB softwares is established, it, will by interface Calling MATLAB in PSCAD
Interface data during commutation failure imports MATLAB and does aggregation of data comparison；
3) the ac bus voltage waveform in the case of AC fault is sent into MATLAB by the interface of PSCAD and MATLAB
Middle progress Fourier's frequency analysis.
Deep circuit simulation and variable analysis is unfolded to various the reason of causing commutation failure in detail in the present invention.It will
Commutation failure process in AC and DC combined hybrid system is divided into two different phases, in different phase, for causing commutation failure
Main cause is analyzed.
Since failure generates the moment, commutation failure twice, first time commutation failure has occurred altogether in DC transmission system
It is since earth fault causes the decline of alternating voltage, the rising of DC current to cause, but due to the timely work of control system
With the timely compensation with reactive power, before failure is not cut off, the phenomenon that commutation failure in singlephase earth fault, is subtracted
Gently；After failure removal, DC current, alternating voltage start gradually to restore, and the reactive requirement of straight-flow system tails off.But
Since DC current injects converter power transformer in straight-flow system, the D.C. magnetic biasing of converter power transformer is caused, is generated in exciting current
The influence of harmonic pollution, especially low-order harmonic is particularly acute, and ac bus voltage waveform is caused to generate distortion, has occurred the
Secondary commutation failure.
As the supplement of above-mentioned technical proposal, have with the blow-out angle of transverter whether commutation failure occurs for DC transmission system
Direct relationship,
Transverter blow-out angle is expressed as：
Wherein, γ：Transverter blow-out angle, β：Transverter commutation advance angle, φ：Mistake caused by being reduced by asymmetrical voltage
Zero phase-shift angle, E：Change of current busbar voltage virtual value, Id：Converter DC-side current value, Xc：Commutating reactance, k：Converter power transformer
No-load voltage ratio.
As the supplement of above-mentioned technical proposal, in one-phase AC-system failure, when DC current is increased to 1.3pu (marks
Value) when, blow-out angle is reduced to 8 electrical angles, thinks that commutation failure takes place in DC transmission system at this time.In AC system
After AC fault occurs, approximately linear changes between the rising and the reduction at blow-out angle of DC current, i.e., DC current is higher, puts out
Arc angle is smaller.
As the supplement of above-mentioned technical proposal, longitudinal comparison three-phase alternating current system failure and one-phase AC-system failure obtain,
When three-phase alternating current system failure, when direct current increase ratio one-phase AC-system failure, is more violent, therefore when DC current is increased to
Just occur commutation failure when 1.1pu (perunit value), commutation nargin when commutation nargin when three-phase fault is than single-phase fault is small.
As the supplement of above-mentioned technical proposal, using electrical quantity abnormal operational conditions on inverter side ac bus as main
Detect variable.
The present invention overcomes the previous commutation failure analysis of causes not comprehensively, the more unilateral disadvantage of single-order piecewise analysis, if not
The generation that can consider secondary commutation failure, ignores the influence etc. of harmonic wave and converter transformer DC magnetic bias.The present invention is by AC and DC
Commutation failure process in combined hybrid system is divided into two different phases, in different phase, for causing the main original of commutation failure
Because being analyzed, the operation stability of interacted system is realized when AC/DC interconnected system breaks down.
Description of the drawings
Fig. 1 is that invertor operation converter structure figure is used as in the embodiment of the present invention；
Fig. 2 is typical two-terminal direct current transmission system CIGRE simulation model figures in the embodiment of the present invention；
Fig. 3 is that the front and back blow-out angle of AC fault generation changes over time situation map in the embodiment of the present invention；
Fig. 4 is three-phase voltage maximum value variation diagram on inverter side ac bus in the embodiment of the present invention；
Fig. 5 is that straight-flow system voltage, electric current change over time figure in the embodiment of the present invention；
Rectification side, inverter side active power variation diagram when Fig. 6 is single-phase fault in the embodiment of the present invention；
Rectification side, inverter side reactive power variation diagram when Fig. 7 is single-phase fault in the embodiment of the present invention；
Fig. 8 is the ac bus voltage waveform frequency analysis figure of inverter side in the embodiment of the present invention；
Fig. 9 is that front and back inverter side converter power transformer excitation current waveform analysis occurs for AC fault in the embodiment of the present invention
Figure；
Figure 10 is inverter side converter power transformer magnetic linkage analysis chart in the embodiment of the present invention；
Figure 11 is inverter side converter power transformer exciting current frequency analysis figure in the embodiment of the present invention；
When Figure 12 is failure in the embodiment of the present invention blow-out angle with DC current change curve.
Specific implementation mode
The invention will be further described with specific implementation mode with reference to the accompanying drawings of the specification.
One, analysis of causes method
Transverter work structuring figure as shown in Figure 1, the present invention divide the commutation failure process in AC and DC combined hybrid system
For different phase, in different phase, for causing commutation failure the main reason for is analyzed.Include the following steps：
(1) present invention illustrates direct current transportation by taking simplest single bridge transverter as an example from the principle of thyristor commutation
The reason of commutation failure, occurs for system.500kV, the direct current transportation CIGRE International standardizations of 1000MW are established in PSCAD softwares
Model.Different electric faults is set in inverter side ac bus exit, is cut off after continuing the identical time.With blow-out angle
Become the basis for estimation for being turned to commutation failure.Ac bus voltage, DC current, blow-out angle, direct current before and after observation fault setting
The variables such as the idle of line transmission, active power, the relationship of qualitative analysis these variables and commutation failure.
(2) interface between PSCAD softwares and MATLAB softwares is established, it, will by interface Calling MATLAB in PSCAD
Interface data during commutation failure imports MATLAB and does aggregation of data comparison.
(3) the ac bus voltage waveform in the case of AC fault is sent by the interface of PSCAD and MATLAB
Fourier's frequency analysis is carried out in MATLAB.
There is direct relationship with the blow-out angle of transverter whether commutation failure occurs for straight-flow system
The blow-out angle of transverter is represented by,
Wherein,
γ：Transverter blow-out angle
β：Transverter commutation advance angle
φ：Zero passage angle of phase displacement caused by being reduced by asymmetrical voltage
E：Change of current busbar voltage virtual value
Id：DC line current value
Xc：Commutating reactance
k：The no-load voltage ratio of converter power transformer
Abnormal variation occurs for the electrical quantity on the irregular operating of AC transmission system, especially inverter side ac bus
Often induce the main reason for system commutation process carries out unsuccessfully.Therefore electrical quantity abnormal operational conditions on ac bus are made
To predominantly detect variable.
By observing the variation at blow-out angle to determine whether commutation failure occurs, determines to work as on the basis of theoretical research and put out
Arc angle γ judges that commutation failure has occurred in straight-flow system when being less than 8 ° of electrical angles.Since failure generates the moment, straight-flow system
Commutation failure twice has occurred altogether, first time commutation failure is since earth fault causes the decline of alternating voltage, direct current
The rising of stream causes, but the timely compensation of the timely effect and reactive power due to control system, before failure is not cut off,
The phenomenon that commutation failure in singlephase earth fault, is able to mitigate after failure removal, DC current, alternating voltage start by
Gradually restore, the reactive requirement of straight-flow system tails off.But it is made due to the injection converter power transformer of DC current in straight-flow system
At the D.C. magnetic biasing of converter power transformer, the influence that harmonic pollution, especially low-order harmonic are produced in exciting current is particularly acute,
Cause ac bus voltage waveform to generate distortion, second of commutation failure has occurred.
Meanwhile after AC system generation, approximately linear becomes between being gradually reduced of the rising of DC current and blow-out angle
Change, i.e., DC current is higher, and blow-out angle is smaller.In single-phase fault, when DC current is increased to 1.3pu, blow-out angle reduces
To 8 electrical angles, think that commutation failure takes place in straight-flow system at this time.Simultaneously longitudinal comparison three-phase alternating current system failure and
One-phase AC-system failure can obtain, and when three-phase alternating current failure, when direct current increase ratio single-phase fault is more violent, therefore works as direct current
Commutation failure just occurs when being increased to 1.1pu for stream, and commutation nargin when commutation nargin when three-phase fault is than single-phase fault is small.
Two, example is shown
The alternating current-direct current interconnection architecture schematic diagram of example is as shown in Fig. 2, design parameter is as shown in table 1.
1 HVDC system nominal parameter lists of table
Whether the present invention is built will use the blow-out angle of thyristor defined less than theoretically when circuit carries out software analysis
The critical extinction angle (frequently with 8 ° when judgement) of commutation failure occurs in advance to determine that the artificial circuit built has in commutation process
Do not carry out failure.Single-phase fault is set on inverter side ac bus, A phase faults occur in 0.3s, failure maintains 0.05s
Time, i.e., cut off failure when 3.05s, failure generation before and after, the blow-out angle of thyristor becomes at any time in transverter
Change such as Fig. 3.Two periods for being easy to judge that commutation failure occurs by figure, a period are very short after failure generation
Commutation failure has occurred in time.But before 0.35s cuts off failure, interior blow-out angle increased for some time, but
For blow-out angle when working normally than before, the value at the blow-out angle restored before excision failure is reduced, and there is no restore
To the value worked normally before.Then after 0.35s cuts off failure, the value at the blow-out angle of the thyristor of transverter is again again
It is reduced to 0 electrical angle, commutation failure occurs again at this time.It the reason of to seek commutation failure generation twice, monitors again
Its front and back dependent variable occurs for failure.The voltage change to break down on front and back inverter side ac bus is as shown in Figure 4.Direct current system
System voltage, electric current change over time as shown in Figure 5.Front and back rectification side, the variation of inverter side active and reactive power occur for single-phase fault
As shown in Figure 6,7.
It can be analyzed by upper figure, since failure generates the moment, commutation failure twice has occurred altogether in straight-flow system, the
Commutation failure be since earth fault causes the decline of alternating voltage, the rising of DC current to cause, but due to control
The timely compensation of the timely effect and reactive power of system, before failure is not cut off, the commutation failure in singlephase earth fault
The phenomenon that be able to mitigate after failure removal, DC current, alternating voltage start gradually to restore, the reactive requirement of straight-flow system
It tails off.The basic variable of AC/DC Power System in commutation process has been monitored to obtain, the alternating voltage in single-phase fault is demonstrated
Variation with DC current is to influence the factor of commutation failure.The above analysis of causes is equally applicable to three-phase alternating current system failure.
This be also AC system occur single-phase fault when cause first time commutation failure the main reason for, but at this time still can not solve
Release straight-flow system occur secondary commutation failure the reason of, then at this time when verifying three-phase alternating current system failure commutation failure influence
When factor, it is still desirable to which the reason of second of commutation failure occurs to straight-flow system is explored and explained.
Compare the variation that front and back voltage waveform occurs for failure, it can be seen that after failure removal, voltage waveform occurs
Different degrees of distortion, especially after failure removal, the distortion of alternating voltage waveform is more obvious.Inverter side is exchanged
The voltage waveform of busbar carries out Fourier's frequency analysis, and frequency analysis waveform is illustrated in fig. 8 shown below.Inverter side converter power transformer is encouraged
Magnetoelectricity stream waveform analysis is as shown in Figure 9.The analysis of inverter side converter power transformer magnetic linkage is as shown in Figure 10.Inverter side converter power transformer is encouraged
Magnetoelectricity stream frequency analysis is as shown in figure 11.
In conclusion during the recovery that AC system breaks down, second of commutation failure will occur for straight-flow system,
The main reason is that since DC current injects converter power transformer, makes the exciting current in transformer that D.C. magnetic biasing have occurred, lead
Cause low-order harmonic occur in the excitation current waveform of converter power transformer, low-order harmonic is injected in commutation voltage waveform, led simultaneously
Ac bus commutation voltage wave distortion is caused, and then leads to the generation of second of commutation failure.
Because the lasting duration of fault in ac transmission system is different, the severity that commutation failure occurs is different, commutation failure mistake
The variation of variable is also different in journey, and the emulation experiment that same failure difference is held time is emulated using Multiple Run elements
1000 times, by the variable import MATLAB softwares in the commutation process monitored, carry out data analysis, when failure blow-out angle with
The change curve of DC current is as shown in figure 12.
After AC system generation, approximately linear changes between being gradually reduced of the rising of DC current and blow-out angle, i.e.,
DC current is higher, and blow-out angle is smaller.In single-phase fault, when DC current is increased to 1.3pu, blow-out angle is reduced to 8
Electrical angle thinks that commutation failure takes place in straight-flow system at this time.Longitudinal comparison three-phase alternating current system failure and single-phase simultaneously
Fault in ac transmission system can obtain, and when three-phase alternating current failure, when direct current increase ratio single-phase fault is more violent, therefore works as DC current liter
Just occur commutation failure when height is to 1.1pu, commutation nargin when commutation nargin when three-phase fault is than single-phase fault is small.
Embodiments of the present invention above described embodiment only expresses, can not be therefore understands that for patent of invention range
Limitation, also not to the present invention structure make any form of restriction.It should be pointed out that for the common skill of this field
For art personnel, without departing from the inventive concept of the premise, several changes and improvements can also be made, these belong to this hair
Bright protection domain.
Claims (5)
1. a kind of the reason of DC transmission system commutation failure analysis method, which is characterized in that will be in AC and DC combined hybrid system
Commutation failure process is divided into two different phases, and in different phase, to causing commutation failure the main reason for is analyzed, including
Following steps：
1) the direct current transportation CIGRE International standardization models of 500kV, 1000MW are established in PSCAD softwares；It is exchanged in inverter side
Different electric faults is arranged in busbar exit, is cut off after continuing the identical time, commutation failure is turned to the change at blow-out angle
Basis for estimation；Observation fault setting before and after ac bus voltage, DC current, blow-out angle, DC line transmission it is idle, have
Work(power, the relationship of qualitative analysis these variables and commutation failure；
2) interface between PSCAD softwares and MATLAB softwares is established, by interface Calling MATLAB in PSCAD, by commutation
Interface data in failure procedure imports MATLAB and does aggregation of data comparison；
3) by the ac bus voltage waveform in the case of AC fault by the interface of PSCAD and MATLAB be sent into MATLAB into
Row Fourier's frequency analysis.
2. the reason of DC transmission system commutation failure according to claim 1 analysis method, which is characterized in that direct current is defeated
There is direct relationship with the blow-out angle of transverter whether commutation failure occurs for electric system,
Transverter blow-out angle is expressed as：
Wherein, γ：Transverter blow-out angle, β：Transverter commutation advance angle, φ：Zero passage phase caused by being reduced by asymmetrical voltage
Move angle, E：Change of current busbar voltage virtual value, Id：Converter DC-side current value, Xc：Commutating reactance, k：The change of converter power transformer
Than.
3. the reason of DC transmission system commutation failure according to claim 2 analysis method, which is characterized in that single-phase
When fault in ac transmission system, when DC current is increased to 1.3pu, blow-out angle is reduced to 8 electrical angles, thinks direct current transportation at this time
Commutation failure takes place in system.
4. the reason of DC transmission system commutation failure according to claim 3 analysis method, which is characterized in that longitudinal right
It is obtained than three-phase alternating current system failure and one-phase AC-system failure, when three-phase alternating current system failure, direct current increase ratio single phase ac
It is more violent when the system failure, therefore commutation failure just occurs when DC current is increased to 1.1pu, commutation when three-phase fault
Commutation nargin when nargin is than single-phase fault is small.
5. the reason of DC transmission system commutation failure according to claim 1 or 2 analysis method, which is characterized in that will
Electrical quantity abnormal operational conditions are used as and predominantly detect variable on inverter side ac bus.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109635732A (en) * | 2018-12-12 | 2019-04-16 | 国网山东省电力公司电力科学研究院 | A kind of continuous commutation failure fault pre-alarming network training method of LCC-HVDC |
| CN109861264A (en) * | 2018-12-05 | 2019-06-07 | 国网河南省电力公司电力科学研究院 | Whether excitation surge current will lead to the appraisal procedure and device of HVDC commutation failure |
| CN111239471A (en) * | 2020-01-19 | 2020-06-05 | 华南理工大学 | Commutation failure protection method and device, computer equipment and storage medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103730907A (en) * | 2014-01-26 | 2014-04-16 | 华北电力大学 | Defense method for commutation failures of direct-current transmission based on current limiting method |
| CN103886146A (en) * | 2014-03-12 | 2014-06-25 | 河海大学 | Control parameter optimization method for improving phase commutating failure restraining capacity of direct current system |
| CN104237745A (en) * | 2014-10-16 | 2014-12-24 | 国家电网公司 | Method for judging abnormal commutation failure of multi-feed high-voltage DC transmission system |
| CN106849150A (en) * | 2017-04-06 | 2017-06-13 | 国家电网公司 | A kind of commutation failure Predictive Control System and method based on harmonic voltage detection |
-
2018
- 2018-04-28 CN CN201810405046.XA patent/CN108631351A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103730907A (en) * | 2014-01-26 | 2014-04-16 | 华北电力大学 | Defense method for commutation failures of direct-current transmission based on current limiting method |
| CN103886146A (en) * | 2014-03-12 | 2014-06-25 | 河海大学 | Control parameter optimization method for improving phase commutating failure restraining capacity of direct current system |
| CN104237745A (en) * | 2014-10-16 | 2014-12-24 | 国家电网公司 | Method for judging abnormal commutation failure of multi-feed high-voltage DC transmission system |
| CN106849150A (en) * | 2017-04-06 | 2017-06-13 | 国家电网公司 | A kind of commutation failure Predictive Control System and method based on harmonic voltage detection |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109861264A (en) * | 2018-12-05 | 2019-06-07 | 国网河南省电力公司电力科学研究院 | Whether excitation surge current will lead to the appraisal procedure and device of HVDC commutation failure |
| CN109861264B (en) * | 2018-12-05 | 2022-04-22 | 国网河南省电力公司电力科学研究院 | Method and device for evaluating whether excitation surge current can cause HVDC commutation failure |
| CN109635732A (en) * | 2018-12-12 | 2019-04-16 | 国网山东省电力公司电力科学研究院 | A kind of continuous commutation failure fault pre-alarming network training method of LCC-HVDC |
| CN109635732B (en) * | 2018-12-12 | 2020-10-09 | 国网山东省电力公司电力科学研究院 | LCC-HVDC continuous commutation failure fault early warning network training method |
| CN111239471A (en) * | 2020-01-19 | 2020-06-05 | 华南理工大学 | Commutation failure protection method and device, computer equipment and storage medium |
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Application publication date: 20181009 |