CN105226620B - A kind of implementation method of bipolar commutation failure protection - Google Patents
A kind of implementation method of bipolar commutation failure protection Download PDFInfo
- Publication number
- CN105226620B CN105226620B CN201510712856.6A CN201510712856A CN105226620B CN 105226620 B CN105226620 B CN 105226620B CN 201510712856 A CN201510712856 A CN 201510712856A CN 105226620 B CN105226620 B CN 105226620B
- Authority
- CN
- China
- Prior art keywords
- commutation failure
- protection
- implementation method
- bipolar
- bridge
- 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.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000005540 biological transmission Effects 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000000518 rheometry Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Landscapes
- Protection Of Static Devices (AREA)
- Inverter Devices (AREA)
Abstract
The present invention relates to a kind of implementation method of bipolar commutation failure protection, belong to extra-high voltage direct-current transmission protection technique field.The present invention gathers the three-phase current of converter transformer valve star side and angle side first, with obtained corresponding IVY and IVD, and valve group high and low side outlet electric current IDCP, IDCN is gathered, using the maximum among both as ID；Then current signal carries out protection decision logic used by; whether interpretation occurs commutation failure; and after any bridge commutation failure is detected, start any bridge commutation failure logical circuit of counter, i.e., corresponding commutation failure number whether occurs in effective time window；Such as meet condition, then output action signal to control system；If control system detects this pole action signal and to pole action signal while met, the locking pole.The above method proposed by the invention can quickly and accurately failure judgement, realize bipolar quick lock, reduce the power swing to ac grid system, improve the safe and reliable operation of ac grid system.
Description
Technical field
The present invention relates to a kind of implementation method of bipolar commutation failure protection, belongs to extra-high voltage direct-current transmission protection technique neck
Domain.
Background technology
Extra-high voltage direct-current commutation failure protection is defencive function important in extra-high voltage DC transmission system, detection exchange system
Failure of uniting or caused commutation failure situations such as valve control exception.The continuous commutation failure of single bridge generation is typically due to trigger pulse and gone out
Caused by existing problem, fault in ac transmission system can cause all commutation failures in fortune valve group.Original commutation failure protection is directed to
Commutation failure caused by trigger pulse is configured with single bridge commutation failure section；Any bridge commutation is configured with for fault in ac transmission system to lose
Quick fraction and at a slow speed section are lost, the maximum duration that relay protective scheme and the main consideration of delay are removed with fault in ac transmission system is coordinated.
As the power that DC transmission system transmits is increasing, Simulation results show：When changing for generation continuation
Mutually during failure, cause the power swing of power network excessive, the serious consequence of Out of step may be caused, therefore ac grid system is exchanged
Mutually the ability to bear of failure turns into the important external constraint of commutation failure protection actuation time definite value.
The content of the invention
It is an object of the invention to provide a kind of implementation method of bipolar commutation failure protection, so that bipolar commutation failure is occurring
When reduce AC system power network power swing.
The present invention provides a kind of implementation method of bipolar commutation failure protection, this method bag to solve above-mentioned technical problem
Include following steps：
1) three-phase current of converter transformer valve star side and angle side is gathered, with obtained corresponding IVY and IVD, and gathers valve group
High and low side outlet electric current IDCP, IDCN, the maximum using among both are used as ID；
2) protection decision logic is carried out according to the current signal collected, detects whether that commutation failure occurs；
If 3) after detecting any bridge commutation failure, start any bridge commutation failure logical circuit of counter, i.e., in effective time
Corresponding commutation failure number whether occurs in window, and commutation failure protection action signal is exported to control when meeting condition
System；
4) if control system detects that this pole sends commutation failure protection action signal, the locking pole in fortune valve group.
Protection decision logic in the step 2) is as follows：
Star side criterion is：ID-IVY ＞ Δ+K*ID, and ID*K ＞ IVY；
Angle side criterion is：ID-IVD ＞ Δ+K*ID, and ID*K ＞ IVD；
Δ is constant definite value, and K is ratio brake coefficient；Star, angle side is any meets then to think to detect any bridge during criterion
Generation commutation failure.
IVY in the step 1) is the half of converter transformer valve star side three-phase current absolute value sum, and IVD is converter transformer valve
The half of angle side three-phase current absolute value sum.
Commutation failure logical circuit of counter is in the step 3)：
Using any bridge commutation failure as 0 moment, counter counts 1 and self-sustaining the first setting time section T1；After counter counts 1
If detecting any bridge commutation failure during T1 to 2T1, counter counts 2 and self-sustaining T1；T1 to second is set after counter counts 2
Any bridge commutation failure is detected during period T2 again, then valve unit protection action outlet.
2T1 moment in the commutation failure logical circuit of counter after counter is 1, counter clear 0.
The outlet signal pulsewidth is the second setting time section T2.
After control system in the step 4) receives commutation failure protection action signal, mutually transmission protection between the two poles of the earth
Action signal.
The first setting time section T1 is 200ms, and the first setting time section T2 is 500ms.
The beneficial effects of the invention are as follows:The present invention gathers the three-phase current of converter transformer valve star side and angle side first, to obtain
Corresponding IVY and IVD, and valve group high and low side outlet electric current IDCP, IDCN are gathered, using the maximum among both as ID；So
Current signal carries out protection decision logic used by afterwards, and whether interpretation occurs commutation failure, and is detecting any bridge
After commutation failure, start any bridge commutation failure logical circuit of counter, i.e., corresponding commutation whether occurs in effective time window and loses
Lose number；Such as meet condition, then output action signal to control system；If control system detects this pole action signal and to pole
Action signal meets simultaneously, then the locking pole.The above method proposed by the invention can quickly and accurately failure judgement, it is real
Existing bipolar quick lock, reduces the power swing to ac grid system, improves the safe and reliable operation of ac grid system.
Brief description of the drawings
Fig. 1 is extra-high voltage major loop and measuring point schematic diagram；
Fig. 2 is the logical sequence schematic diagram of the bipolar commutation failure protection implementation method of the present invention；
Fig. 3 is the logic diagram of the bipolar commutation failure protection implementation method of the present invention；
Fig. 4 is the installation drawing that the bipolar commutation failure protection of the present invention is realized.
Embodiment
The embodiment of the present invention is described further below in conjunction with the accompanying drawings.
A kind of embodiment of the implementation method of bipolar commutation failure protection of the present invention
The implementation method of bipolar commutation failure protection in the present embodiment gathers the three of converter transformer valve star side and angle side first
Phase current, with obtained corresponding IVY and IVD, and valve group high and low side outlet electric current IDCP, IDCN are gathered, among both
Maximum is ID；Then current signal carries out protection decision logic used by, and whether interpretation occurs commutation failure, and
After detecting any bridge commutation failure, start any bridge commutation failure logical circuit of counter, i.e., whether occur in effective time window
Corresponding commutation failure number；Such as meet condition, then output action signal to control system；If control system detects that this is extremely dynamic
Make signal and to pole action signal while meet, then the locking pole.The specific implementation process of this method is as follows：
1. valve unit protection collection converter transformer valve star side three-phase current, take its absolute value sum divided by 2 obtain IVY；Collection is changed
Rheology valve angle side three-phase current, take its absolute value sum divided by 2 obtain IVD；The high and low side outlet electric current of valve group is gathered, asks both
Maximum be ID.Extra-high voltage major loop and measuring point schematic diagram are as shown in Figure 1 in the present embodiment.
2. valve group carries out protection decision logic according to the above-mentioned current signal collected, determine whether that any bridge changes
Mutually failure.Its protection decision logic used for：
Star side criterion is：ID-IVY ＞ Δ+K*ID, and ID*K ＞ IVY；
Angle side criterion is：ID-IVD ＞ Δ+K*ID, and ID*K ＞ IVD；
Δ is constant definite value, and K is ratio brake coefficient；Star, angle side is any meets then to think to detect any bridge during criterion
Generation commutation failure.
3. if after detecting any bridge commutation failure, as total power value meets to be more than certain value, then start any bridge commutation
Fail count logic, i.e., corresponding commutation failure number whether occurs in effective time window, such as meets condition, then output is dynamic
Make signal to control system.
As shown in Figures 2 and 3, commutation failure logical circuit of counter refers in the present embodiment：Once detect any bridge commutation
Failure (0 moment), counter counts 1 and self-sustaining 200ms, detect that any bridge changes during 200ms to 400ms after counter counts 1
Mutually failure, counter counts 2 and self-shield 200ms；Detect any bridge commutation after counter counts 2 during 200ms to 500ms again
Failure, valve unit protection action outlet, outlet signal pulsewidth is 500ms.Its Counter is the 400ms moment after 1, and counter is clear
Zero.
4. pole control detects this level and sends commutation failure protection action signal in fortune valve group, control system receives protection act
After signal, mutually transmission protection signal, control system detect this pole action signal and to pole action signals between the two poles of the earth
Meet simultaneously, the locking pole.Signal transmits and logic finally realizes relevant apparatus as shown in Figure 4.
Considered based on electric power netting safe running angle, the implementation method of bipolar commutation failure protection proposed by the invention includes
Collection, Protection criteria and the corresponding protection act strategy of analog signal.Method proposed by the invention can be quickly and accurately
Failure judgement, bipolar quick lock is realized, reduce the power swing to ac grid system, improve the peace of ac grid system
Full reliability service.
Claims (6)
1. a kind of implementation method of bipolar commutation failure protection, it is characterised in that the implementation method comprises the following steps：
1）The three-phase current of converter transformer valve star side and angle side is gathered, with obtained corresponding IVY and IVD, and it is high and low to gather valve group
Side outlet electric current IDCP, IDCN, the maximum using among both are used as ID；
2）Protection decision logic is carried out according to the current signal collected, detects whether that commutation failure occurs；
3）If after detecting any bridge commutation failure, start any bridge commutation failure logical circuit of counter, i.e., in effective time window
Inside whether occur corresponding commutation failure number, and export when meeting condition commutation failure protection action signal to controlling and be
System；
4）If control system detects that this pole sends commutation failure protection action signal, the locking pole in fortune valve group；
The step 2）In protection decision logic it is as follows：
Star side criterion is：ID-IVY>△+K*ID, and ID*K>IVY；
Angle side criterion is：ID-IVD>△+K*ID, and ID*K>IVD；
△ is constant definite value, and K is ratio brake coefficient；Star, angle side are any to be met then to think to detect that any bridge occurs during criterion
Commutation failure；
The step 1）In IVY be converter transformer valve star side three-phase current absolute value sum half, IVD is converter transformer valve angle side
The half of three-phase current absolute value sum.
2. the implementation method of bipolar commutation failure protection according to claim 1, it is characterised in that the step 3）In change
Phase fail count logic is：
Using any bridge commutation failure as 0 moment, counter counts 1 and self-sustaining the first setting time section T1；T1 is arrived after counter counts 1
If detecting any bridge commutation failure during 2T1, counter counts 2 and self-sustaining T1；T1 is to the second setting time after counter counts 2
Any bridge commutation failure is detected again during section T2, then valve unit protection action outlet.
3. the implementation method of bipolar commutation failure protection according to claim 2, it is characterised in that the commutation failure meter
2T1 moment in number logic after counter is 1, counter clear 0.
4. the implementation method of bipolar commutation failure protection according to claim 2, it is characterised in that valve unit protection acts out
The outlet signal pulsewidth of mouth is the second setting time section T2.
5. the implementation method of bipolar commutation failure protection according to claim 2, it is characterised in that the step 4）In
After control system receives commutation failure protection action signal, protection signal is mutually transmitted between the two poles of the earth.
6. the implementation method of bipolar commutation failure protection according to claim 4, it is characterised in that during first setting
Between section T1 be 200ms, the second setting time section T2 is 500ms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510712856.6A CN105226620B (en) | 2015-10-28 | 2015-10-28 | A kind of implementation method of bipolar commutation failure protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510712856.6A CN105226620B (en) | 2015-10-28 | 2015-10-28 | A kind of implementation method of bipolar commutation failure protection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105226620A CN105226620A (en) | 2016-01-06 |
| CN105226620B true CN105226620B (en) | 2018-02-13 |
Family
ID=54995412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510712856.6A Active CN105226620B (en) | 2015-10-28 | 2015-10-28 | A kind of implementation method of bipolar commutation failure protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105226620B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105932705B (en) * | 2016-05-19 | 2018-11-30 | 国电南瑞科技股份有限公司 | A kind of emergency control method for coping with the continuous commutation failure of high voltage direct current |
| CN106253321B (en) * | 2016-08-31 | 2018-08-24 | 国网河南省电力公司电力科学研究院 | A kind of optimization method of DC control and protection system commutation failure PREDICTIVE CONTROL |
| CN109659964B (en) * | 2017-10-12 | 2023-09-22 | 中国电力科学研究院 | Method and device for preventing direct current locking |
| CN108398616B (en) * | 2017-12-27 | 2020-06-09 | 广东电网有限责任公司电力调度控制中心 | Alternating current line fault direction judging method based on direct current commutation failure detection |
| CN111239471B (en) * | 2020-01-19 | 2021-02-19 | 华南理工大学 | Commutation failure protection method and device, computer equipment and storage medium |
| CN111562462B (en) * | 2020-04-15 | 2022-07-29 | 国电南瑞科技股份有限公司 | Direct-current commutation failure identification method and device based on current characteristics of converter valve |
| CN111697546B (en) * | 2020-06-10 | 2022-07-22 | 南京南瑞继保电气有限公司 | Commutation failure acceleration protection method and system |
| CN113612190B (en) * | 2021-07-29 | 2023-10-13 | 中国电力科学研究院有限公司 | Method and system for executing reclosing of alternating current line based on safety margin index |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1896757A (en) * | 2006-06-28 | 2007-01-17 | 南京南瑞继保电气有限公司 | Phase-shifting fail ture by couting discrimination |
-
2015
- 2015-10-28 CN CN201510712856.6A patent/CN105226620B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1896757A (en) * | 2006-06-28 | 2007-01-17 | 南京南瑞继保电气有限公司 | Phase-shifting fail ture by couting discrimination |
Non-Patent Citations (1)
| Title |
|---|
| 直流输电系统换相失败研究综述;袁阳;《电力自动化设备》;20131130;第140-147页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105226620A (en) | 2016-01-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105226620B (en) | A kind of implementation method of bipolar commutation failure protection | |
| CN104251959B (en) | A kind of system for detecting and positioning one-phase earthing failure in electric distribution network | |
| CN103645404A (en) | Micro-grid islanding detection method | |
| CN103490511B (en) | A kind of power distribution network communication terminal detection system and method | |
| CN101478150B (en) | Intelligent diagnosis method and apparatus for power transmission and distribution line state | |
| CN111766534B (en) | Traction converter ground fault detection method and device | |
| CN107069682B (en) | A kind of HVDC transmission line back-up protection method based on DC control system | |
| CN106159985B (en) | A kind of anti-isolated island method and apparatus of DC distribution net distributed generation resource | |
| CN105226621A (en) | A kind of distribution type fiber-optic longitudinal difference protection system and method being applicable to high-speed railway | |
| CN110854810A (en) | One-point grounding protection method for rotor of large synchronous phase modulator | |
| CN104849541B (en) | A kind of method for realizing voltage measurement abnormality detection in DC protection system | |
| CN106788021A (en) | A kind of field power supply synchronous signal acquisition processing method and processing device | |
| CN104167716B (en) | Protection control method and system of power factor correction circuit | |
| CN105866602A (en) | High-voltage direct current power transformation converter valve phase change failure resistance device | |
| CN103713234B (en) | The recognition methods of a kind of Reactor Fault and device | |
| CN108599225A (en) | A kind of commutation failure forecast Control Algorithm and its device based on direct current tolerance | |
| CN109193591A (en) | A method of the starting of three-phase current Sudden Changing Rate is differentiated by floating threshold | |
| CN104578009B (en) | A kind of method of transverter Bridge differential current protection faulty action preventing | |
| CN105790295B (en) | A kind of both-end flexible direct current power transmission system electric network fault is without communication traversing control method | |
| CN105552835B (en) | A kind of method of DC line 50Hz harmonic protection faulty action preventings | |
| CN110518622A (en) | A kind of commutation failure detects in advance and prevention method, device | |
| CN108898783A (en) | A kind of Warehouse Fire alarm control system | |
| CN105305508A (en) | Method for controlling trigger angle in phase commutation failure | |
| CN112117777B (en) | Photovoltaic grid-connected island detection method based on zero sequence current injection | |
| CN103048591A (en) | Power grid environment monitoring circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |