CN104009461B - The method weakening interpolar interference during direct current transmission line fault restarting - Google Patents
The method weakening interpolar interference during direct current transmission line fault restarting Download PDFInfo
- Publication number
- CN104009461B CN104009461B CN201410242389.0A CN201410242389A CN104009461B CN 104009461 B CN104009461 B CN 104009461B CN 201410242389 A CN201410242389 A CN 201410242389A CN 104009461 B CN104009461 B CN 104009461B
- Authority
- CN
- China
- Prior art keywords
- pole
- time window
- line fault
- restarting
- control device
- 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
Landscapes
- Control Of Electrical Variables (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The present invention weakens the method for interpolar interference when providing a kind of direct current transmission line fault restarting, the circuit restarting signal of this pole, by the communication channel between respective pole control device, is each delivered to the pole control device of another pole by two poles；When a failure occurs it, the pole control device perfecting pole receives after the circuit restarting signal of line fault pole, in very first time window, is described second set regulator parameter by proportional and integral controller parameter switching；After time window terminates, revert to use first set regulator parameter；And perfect pole in the second time window, automatically forbid perfecting pole DC low-voltage current-limiting function；After time window terminates, automatically recover to perfect pole DC low-voltage current-limiting function.The present invention, during the line fault restarting of direct current pole, can help another to perfect pole and maintains power stability or carry out normal power and turn band.
Description
Technical field
The present invention relates to the processing method of a kind of high voltage direct current transmission line fault, be applied to high pressure, extra-high straightening
Stream field of power transmission, and control protective unit.
Background technology
High pressure, extra high voltage direct current transmission line distance is remote, weather along the line, with a varied topography, thunderbolt, mountain fire, wind
Partially etc. it is easily caused circuit generation transient fault.For removing DC line transient fault, two poles of DC transmission system
Pole control device be each configured with independent line fault restarting function.After certain pole occurs line fault, first move
Extinguish electric current arc mutually, then go free line insulation of recovering, then restarting recovers the power conveying of this pole；This process
In, if another perfects pole and is in bipolar power control model, will carry out of short duration power ascension, turns tape jam pole
The conveying power of temporary loss, maintains DC bipolar always to carry power constant as far as possible；If during this another
Perfecting pole and be not at bipolar power control model, state of remaining stationary is run.
After certain pole occurs line fault, on the one hand there is electromagnetic induction effect between two-wire line, on the other hand direct current merit
The connected AC system of rate change impact, thus the running status of another pole of remote-effects.Above-mentioned two aspects affect because of
Element and the automatic regulation function of direct current pole control device, including automatic current control, automatism voltage control, power
Turn the functions such as band control so that during certain polar curve road fault, another can be caused to perfect the DC voltage of pole, electric current
Fluctuation, has influence on the steady recovery of fault pole the most again.Along with high pressure, the increase of extra-high voltage direct-current conveying power,
The impact of this interpolar interference is the most increasing, and during the restarting of fault polar curve road, perfecting pole tension may
Fall too low, cause DC low-voltage current limliting (VDCL) function action, cause perfect pole conveying power enter one
Step fluctuation.
DC low-voltage current-limiting function is to limit DC current instruction when DC voltage reduces, and it is mainly used
In after AC or DC fault, improve AC system voltage stability, it is to avoid overvoltage of direct current, help direct current
The controlled recovery of system.When there is line fault in certain pole, this function should work in fault pole；And for strong
Quan Ji, DC low-voltage current limiting action will be unfavorable for that it maintains power stability or carries out power and turn band.
Summary of the invention
It is an object of the invention to: propose to weaken during a kind of direct current transmission line fault restarting the side of interpolar interference
Method, during the line fault restarting of direct current pole, it is to avoid another perfects pole DC low-voltage current-limiting function action,
Contribute to it maintain power stability or carry out normal power and turn band.
The technical scheme is that
A kind of method weakening interpolar interference during direct current transmission line fault restarting, is characterized in that: include step:
The circuit restarting signal of this pole, by the communication channel between respective pole control device, is each sent by two poles
Device is controlled in pole to another pole；
When a failure occurs it, the pole control device perfecting pole receives the circuit restarting signal from line fault pole
After, in very first time window, it is described second set regulator parameter by proportional and integral controller parameter switching；
After time window terminates, revert to use first set regulator parameter；And perfect pole in the second time window,
Automatically forbid perfecting pole DC low-voltage current-limiting function；After time window terminates, automatically recover to perfect pole DC low-voltage
Current-limiting function；
Wherein, the proportional and integral controller in pole control device, preset at least two set parameters, at least a part of which presets institute
State first set parameter for nominal situation, preset described second set parameter during certain pole line fault restarting
Perfect the regulation of pole.
Further: described second set parameter is compared with first set parameter, and the second set parameter slows down the tune of actuator
Joint speed, reduces overshoot.
Further: described very first time window span is 100ms-2000ms.
Further: described second time window span is 100ms-1000ms.
The invention has the beneficial effects as follows: during the line fault restarting of direct current pole, can be weakened another and perfect pole
Quickly regulate the voltage pulsation caused because of actuator, it is to avoid its DC low-voltage current-limiting function action, contribute to its dimension
Hold power stability or carry out normal power and turn band.
The present invention is applicable to the high pressure of bipolar long distance powedr transmission, extra-high voltage direct-current Control protection system.
Accompanying drawing explanation
After Fig. 1 is certain pole DC line fault, another perfects the process logic chart of pole.
Detailed description of the invention
Below with reference to drawings and the specific embodiments, technical scheme is described in detail.
The present invention first passes through the communication channel between the pole control device of two poles, each by the circuit restarting of this pole
Signal delivers to the pole control device of another pole；
Proportional and integral controller in pole control device, can preset some set parameters.
In the present embodiment, as shown in Figure 1, in Fig. 1, time window is meant that: when input is become 1 by 0,
Output will remain 1 within a period of time, and after this period terminates, time window output will be 0, and time window is protected
The time of 1 of holding is defined by its time parameter.
In the DC low-voltage current limliting logical block of Fig. 1, when inputting 3=0, output=f (input 1 inputs 2),
Wherein f () represents conventional DC low-voltage current limliting function, and implication is: export by input 1 and input 2 bases
The functional relationship of DC low-voltage current limliting determines；When inputting 3=1, output=input 2, the most now direct current is low
Pressure current-limiting function is inoperative, and output is without DC low-voltage current limliting function.
For the current ratio integral controller in pole control device, preset two set parameters.First set parameter is for just
Often operating mode；During second set parameter is exclusively used in certain pole line fault restarting, perfect the regulation operating mode of pole.Second
Set parameter is compared with first set parameter, and its parameter choice direction is the governing speed of actuator of slowing down, and increases regulation
Time, reduce overshoot, the DC voltage that actuator overshoot causes can be weakened and fall and dc power fluctuation.
In the present embodiment, first set parameter is: scale factor 2.8, integration time constant 10ms；Second set parameter is:
Scale factor 2.0, integration time constant 20ms.
The pole control device perfecting pole receives after the circuit restarting signal of line fault pole, in the regular hour
In window, it is above-mentioned second set regulator parameter by current ratio integral controller parameter switching；Time window is tied
Shu Hou, reverts to use first set regulator parameter.This time window suggestion span is
100ms-2000ms, in the present embodiment, time window is 500ms.
The pole control device perfecting pole receives after the circuit restarting signal of line fault pole, in the regular hour
In window, automatically forbid perfecting pole DC low-voltage current-limiting function；After time window terminates, automatically recover to perfect pole
DC low-voltage current-limiting function.This time window suggestion span is 100ms-1000ms, time in the present embodiment
Between window be 200ms.
Claims (3)
1. the method weakening interpolar interference during direct current transmission line fault restarting, is characterized in that: include step:
The circuit restarting signal of this pole, by the communication channel between respective pole control device, is each delivered to the pole control device of another pole by two poles；
When a failure occurs it, the pole control device perfecting pole receives after the circuit restarting signal of line fault pole, in very first time window, is the second set regulator parameter by proportional and integral controller parameter switching；After time window terminates, revert to use first set regulator parameter；And perfect pole in the second time window, automatically forbid perfecting pole DC low-voltage current-limiting function；After time window terminates, automatically recover to perfect pole DC low-voltage current-limiting function；
Wherein, the proportional and integral controller in pole control device, preset at least two set parameters, at least a part of which presets described first set parameter for nominal situation, presets described second set parameter and perfects the regulation of pole during certain pole line fault restarting；
Described second set parameter is compared with first set parameter, and the second set parameter slows down the governing speed of actuator, reduces overshoot.
2. the method weakening interpolar interference during direct current transmission line fault restarting as claimed in claim 1, is characterized in that: described very first time window span is 100ms-2000ms.
3. the method weakening interpolar interference during direct current transmission line fault restarting as claimed in claim 1, is characterized in that: described second time window span is 100ms-1000ms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410242389.0A CN104009461B (en) | 2014-06-03 | 2014-06-03 | The method weakening interpolar interference during direct current transmission line fault restarting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410242389.0A CN104009461B (en) | 2014-06-03 | 2014-06-03 | The method weakening interpolar interference during direct current transmission line fault restarting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104009461A CN104009461A (en) | 2014-08-27 |
| CN104009461B true CN104009461B (en) | 2016-08-24 |
Family
ID=51370009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410242389.0A Active CN104009461B (en) | 2014-06-03 | 2014-06-03 | The method weakening interpolar interference during direct current transmission line fault restarting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104009461B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105870908B (en) * | 2015-01-21 | 2018-10-26 | 国家电网公司 | Inhibit the method and device of commutation failure during a kind of DC line fault recovery sequence |
| CN105977959B (en) * | 2015-11-27 | 2019-04-05 | 中国电力科学研究院 | A method of turning band raising direct current using power and restarts system stability |
| CN105826912B (en) * | 2016-04-28 | 2022-03-08 | 中国电力科学研究院 | Method for inhibiting non-fault pole direct current voltage drop in extra-high voltage direct current system |
| CN113315125B (en) * | 2021-07-01 | 2023-03-10 | 中国南方电网有限责任公司 | Direct current power recovery characteristic control method for improving alternating current voltage stability |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101923483B (en) * | 2010-03-04 | 2013-06-12 | 许昌开普电器检测研究院 | Simulated direct-current power transmission control protection system |
| CN102611096A (en) * | 2012-03-13 | 2012-07-25 | 浙江大学 | Bipolar direct current power transmission system with direct current failure self-elimination capacity |
| CN103219738B (en) * | 2013-03-29 | 2015-05-20 | 浙江大学 | Direct current transmission system based on three-pole type structure |
-
2014
- 2014-06-03 CN CN201410242389.0A patent/CN104009461B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104009461A (en) | 2014-08-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104009461B (en) | The method weakening interpolar interference during direct current transmission line fault restarting | |
| EP2403088B1 (en) | SSPC for parallel arc fault detection in DC power system | |
| SG10201402497PA (en) | Electrostatic precipitation apparatus for room ventilation and ventilation system incorporating same | |
| CN105471250B (en) | Improve the method and device of digital pfc circuit reliability | |
| CN107465253B (en) | Spare power automatic switching action method automatically adapting to action of stability system | |
| EP3118877A1 (en) | Latching-relay drive circuit | |
| JP2015139343A5 (en) | ||
| CN201282326Y (en) | Input power supply overvoltage protection circuit | |
| WO2011080180A3 (en) | Method for limiting the current output of an electric generator at a high rotational speed | |
| CN202558543U (en) | Control circuit of elevator brake | |
| CN106449323B (en) | Automatic release device with the air gap lightning protection device | |
| CN203260995U (en) | Single-phase safety electricity-using appliance | |
| CN105720885B (en) | A method of realizing high-voltage frequency converter low voltage crossing | |
| CN105914703B (en) | A kind of lightning protection intelligent back-up protection device and its guard method | |
| CN104034955A (en) | Overvoltage warning device | |
| NZ702197A (en) | Control method for preventing auxiliary generator circuit of diesel locomotive from overvoltage | |
| CN205304634U (en) | A output voltage regulator circuit for high tension transmission line is last and response energy taking device thereof | |
| CN210577761U (en) | Open-circuit prevention device for current transformer | |
| CN109217255B (en) | Relay power supply method of phase failure protector of switch machine and relay power supply control module thereof | |
| RU2643787C1 (en) | Method of controlling a shunting reactor at disconnection | |
| CN209016695U (en) | A kind of relay power control module for goat phase failure protector relay power supply | |
| CN203079441U (en) | Elevator control circuit | |
| CN107093924B (en) | Dual-power delay control dual-interlocking alternating-current stabilized voltage supply box with anti-interference function | |
| CN203561907U (en) | DC (direct current) regulated power supply with low power consumption | |
| AU2015365660B2 (en) | A circuit for a voltage power optimiser |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |