CN103364670A - Double-valve-bank voltage balance control method used in extra-high-voltage direct current transmission no-load applied pressure test process - Google Patents
Double-valve-bank voltage balance control method used in extra-high-voltage direct current transmission no-load applied pressure test process Download PDFInfo
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- CN103364670A CN103364670A CN2013103330545A CN201310333054A CN103364670A CN 103364670 A CN103364670 A CN 103364670A CN 2013103330545 A CN2013103330545 A CN 2013103330545A CN 201310333054 A CN201310333054 A CN 201310333054A CN 103364670 A CN103364670 A CN 103364670A
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Abstract
The invention discloses a double-valve bank-voltage balance control method used in the extra-high-voltage direct current transmission no-load applied pressure test prosses. The double-valve bank voltage balance control method is characterized by adding a coordination control logic for commutating converting currents of the high-end and low-end double valve banks into tapping switches in a pole control system and comprises the following specific steps of: adding a binary quantity between a group control system of the low-end valve bank and the control bus communication of the pole control system, wherein the binary quantity is a signal for commutating low-end converting current into the tapping switch controllable, which is sent to the pole control system by the group control system of the low-end valve bank to the pole control system; and adding two binary quantities between a group control system of the high-end valve bank and the control bus communication of the pole control system, wherein one of the binary quantities is a signal for commutating high-end converting current into the tapping switch controllable, which is sent to the pole control system by the group control system of the high-end valve bank, the other binary quantity is a signal for allowing the converting current of the high-end valve bank to be commutated into tapping switch adjustment during OLT (Optical Line Terminal) testing and is issued to the group control system of the high-end valve bank by the pole control system. The double-valve bank voltage balance control method can be used for effectively solving the problem that the voltage unbalance occurs in the high-end valve bank and the low-end valve bank in the no-load applied pressure test process.
Description
Technical field
The present invention relates to the extra-high voltage direct-current transmission field, in particular bivalve group balance of voltage control method in a kind of extra-high voltage direct-current transmission no-load applied voltage test.
Background technology
During the two 12 pulse conversion valve series operation of extra-high voltage direct-current, each utmost point is connected by two valve groups, is connected between extra-high voltage bus and the utmost point neutral bus, is respectively high end valve group and low end valve group.Utmost point control system is divided into utmost point key-course and two levels of valve group key-course, and valve group key-course realizes that the triggering control of high end valve group and low end valve group is called the group control, and utmost point key-course is responsible for the calculating such as pole tension instruction and electrode current instruction and closed-loop control is called utmost point control.
In order to ensure extra-high voltage system when operation device security, the voltage that two 12 flutter valve groups of homopolarity series connection are born should be basic identical.Because two 12 flutter valve groups of series connection are respectively by different valve set control system control; valve group voltage is easy to produce deviation or waves; cause a valve group moving less than 400kV; another valve group is then being moved greater than under the 400kV; cause the vibration of valve group power and system voltage when serious, in case valve group voltage surpasses this valve group overvoltage protection action locking-valve group of valve group overvoltage protection setting value.Therefore, the control of the valve group balance of voltage seems particularly important.
Under the normal released state, need to utilize the electric current correction to carry out balance of voltage control between converting plant of the extra-high voltage direct-current system series connection bivalve group.During no-load applied voltage test (OLT), current conversion station is defined as converting plant in utmost point control system, and the DC voltage control pattern is fully different during from normal release, and when carrying out OLT, DC current is very little, can't utilize the electric current correction to finish balance control.Because the voltage fluctuation of two valve group interbus is larger, if the Control of Voltage logic during according to normal release, namely with the high-end 12 flutter valve group Uact=UdH-UdM of control Uact=Uref(; Low side 12 flutter valve group Uact=UdM-UdN) be target, be difficult to be directly used in the high and low end valve group both end voltage of stable control, particularly along with the rising of line voltage distribution, the voltage fluctuation of valve group interbus also can aggravate, and finally causes no-load applied voltage test to be difficult to successfully.
In order to adapt to extra-high voltage direct-current system bivalve group no-load applied voltage test needs, when current extra-high voltage direct-current system carries out OLT, with Δ U=U
DH-U
RefBe control target, wherein U
DHBe this utmost point DC line voltage, U
RefThe reference voltage that arranges when testing for OLT.The group control of high end valve group is according to Δ U=U during the OLT test
DH-U
RefCalculate this valve group Trigger Angle, the group control mandatory adoption Trigger Angle identical with high end valve group of low end valve group, simultaneously, the low side change of current becomes tap changer gear to be forced to be consistent with high-end change of current change, namely when low side change of current change tap changer gear was higher than high end valve group, the low side change of current becomes sent the order that lowers category; When low side change of current change tap changer gear was lower than high end valve group, the low side change of current becomes sent the order that upgrades, until the low end valve group change of current becomes tap changer gear and high end valve group is consistent.Become the control of following of tap changer gear by Trigger Angle and the change of current, high and low end valve group voltage is fully equal when making OLT, realizes balance of voltage control.
There is very large drawback in this technical scheme, when being OLT, low end valve group group control is forced to follow high end valve component and is connect switch gear and Trigger Angle, but whether the control of high end valve group group does not detect the shunting switch of low end valve group when carrying out the control of Trigger Angle and tap changer gear controlled, process low and middle-end valve group change of current variation connects switch fault if OLT boosts, low end valve group only can follow to change its valve group voltage by Trigger Angle, valve group control reference voltage is very little, meanwhile, high end valve group then still can continue to utilize the means of adjustment tap changer gear and Trigger Angle towards the desired value Δ U=U of no-load applied voltage test
DH-U
RefAdjust its voltage, this will cause high and low end valve group Voltage unbalance, and pressure reduction constantly increases, and finally cause high end valve group overvoltage protection tripping operation, OLT test failure.
Therefore, prior art has yet to be improved and developed.
Summary of the invention
The object of the present invention is to provide bivalve group balance of voltage control method in a kind of extra-high voltage direct-current transmission no-load applied voltage test, be intended to solve prior art and follow the technical matters that high end valve component connects the high and low end valve group Voltage unbalance that switch gear and Trigger Angle cause in the group control of forcing low end valve group.
Technical scheme of the present invention is as follows:
Bivalve group balance of voltage control method in a kind of extra-high voltage direct-current transmission no-load applied voltage test wherein, increases the coordination steering logic that high and low end bivalve group change of current variation is connect switch in utmost point control system, be specially:
Low end valve group group control system with increase a scale-of-two amount between the control bus of utmost point control system is communicated by letter, this scale-of-two amount is " it is controlled that low side change of current variation connects switch " signal, by delivering to utmost point control system on the low end valve group group control system;
High end valve group group control system with increase by two scale-of-two amounts between the control bus of utmost point control system is communicated by letter, be respectively " it is controlled that high-end change of current variation connects switch " signal, by delivering to utmost point control system on the high end valve group group control system, " OLT allows high end valve group change of current variation to connect the switch adjustment during test " signal is issued to high end valve group group control system by utmost point control system.
Bivalve group balance of voltage control method in the described extra-high voltage direct-current transmission no-load applied voltage test, wherein, the specific implementation process comprises: whether all utmost point control system connects the switch controlled comprehensive criterion that carries out to high and low end valve group change of current variation, if it is all controlled that high and low end valve group change of current variation connects switch, utmost point control system then adjusts signal by control bus to the group control system transmission permission shunting switch of high end valve group; If it is unusual that the high and low end change of current becomes arbitrary shunting switch, forbid that then high end valve component connects the switch adjustment.
Bivalve group balance of voltage control method in a kind of extra-high voltage direct-current transmission no-load applied voltage test, wherein, in utmost point control system, increase the coordination steering logic that high and low end bivalve group change of current variation is connect switch, be specially: " it is controlled that low side change of current variation connects switch " signal that low end valve group group control system produces is only extremely controlled system by the control bus transmission, and by the utmost point control system paramount end valve group of the transfer group control system of communicating by letter with the control bus of high end valve group group control system.
Bivalve group balance of voltage control method in the described extra-high voltage direct-current transmission no-load applied voltage test, wherein, the specific implementation process comprises: whether all the group control system of high end valve group connects the switch controlled comprehensive criterion that carries out to high and low end valve group change of current variation, if it is all controlled that high and low end change of current variation connects switch, then allow the group control system of high end valve group to adjust the shunting switch that its change of current becomes; If it is unusual that the high and low end change of current becomes arbitrary shunting switch, forbid that then the change of current variation of high end valve group connects the switch adjustment.
Beneficial effect of the present invention: the present invention is by increasing the coordination steering logic that high and low end bivalve group change of current variation is connect switch in the group control system of utmost point control system or high end valve group, can effectively solve the problem that occurs high and low end valve group Voltage unbalance in the no-load applied voltage test process, the real Complete Synchronization of realizing high and low end valve group tap changer gear and Trigger Angle, high and low end valve group voltage remains balance when guaranteeing the OLT test.
Description of drawings
Fig. 1 is utmost point control system control logic structural representation among the present invention.
Embodiment
For making purpose of the present invention, technical scheme and advantage clearer, clear and definite, developing simultaneously referring to accompanying drawing, the present invention is described in more detail for embodiment.
Referring to Fig. 1, method provided by the invention is at first carried out following steps when carrying out the OLT test:
In utmost point control system, increase the coordination steering logic that high and low end bivalve group change of current variation is connect switch, be specially:
Low end valve group group control system with increase a scale-of-two amount between the control bus of utmost point control system is communicated by letter, this scale-of-two amount is " it is controlled that low side change of current variation connects switch " signal, by delivering to utmost point control system on the low end valve group group control system;
High end valve group group control system with increase by two scale-of-two amounts between the control bus of utmost point control system is communicated by letter, be respectively " it is controlled that high-end change of current variation connects switch " signal, by delivering to utmost point control system on the high end valve group group control system, another signal is issued to high end valve group group control system for " OLT allows high end valve group change of current variation to connect the switch adjustment during test " signal by utmost point control system.
Embodiment one
After having increased semaphore mentioned above and criterion logic, the specific implementation process of this logic comprises:
Whether all utmost point control system connects the switch controlled comprehensive criterion that carries out to high and low end valve group change of current variation, if it is all controlled that high and low end valve group change of current variation connects switch, utmost point control system then adjusts signal by control bus to the group control system transmission permission shunting switch of high end valve group; If it is unusual that the high and low end change of current becomes arbitrary shunting switch, forbid that then high end valve component connects the switch adjustment.
At this moment, the change of current variation of low end valve group connects switch owing to following high end valve group, therefore remain and to become the synchronous of tap changer gear with high and low end valve group Trigger Angle and the change of current, can guarantee that also high and low end valve group remains the balance of voltage in the no-load applied voltage test process.
Embodiment two
The present invention also provides a kind of technical scheme can realize purpose of the present invention in addition, and its control thinking is close with embodiment one, and only implementation method is different.
The embodiment of the invention two is when carrying out the OLT test, and its specific implementation is:
" it is controlled that low side change of current variation connects switch " signal that low end valve group group control system produces is only extremely controlled system by the control bus transmission, and by the utmost point control system paramount end valve group of the transfer group control system of communicating by letter with the control bus of high end valve group group control system.
Detailed process is: whether all the group control system of high end valve group connects the switch controlled comprehensive criterion that carries out to high and low end valve group change of current variation, if it is all controlled that high and low end change of current variation connects switch, then allow the group control system of high end valve group to adjust the shunting switch that its change of current becomes; If it is unusual that the high and low end change of current becomes arbitrary shunting switch, forbid that then the change of current variation of high end valve group connects the switch adjustment.
Balance of voltage steering logic is that the group control system of high and low end valve group judges voluntarily whether the shunting switch of converter power transformer is normal separately during existing OLT test, if undesired, then forbids the shunting switch adjustment of respective valve group.Whether the control of high end valve group group does not detect the shunting switch that hangs down the end valve group when carrying out the control of extinguish angle and tap changer gear controlled; process low and middle-end valve component connects switch fault if OLT boosts; low end valve group only can change its valve group voltage by the Trigger Angle adjustment; valve group control reference voltage is very little; meanwhile; high end valve group still can continue to utilize the means of adjusting tap changer gear and Trigger Angle to adjust its voltage towards the desired value of no-load applied voltage test; this will cause height; low end valve group Voltage unbalance; pressure reduction constantly increases, and finally causes high end valve group overvoltage protection tripping operation; the OLT test failure.
Balance of voltage steering logic is compared during with existing OLT test, the present invention has increased high and low end valve group converter power transformer shunting switch coordinated control function, can realize the Complete Synchronization of the conditions such as high and low end valve group converter power transformer shunting switch, Trigger Angle under the various normal and abnormal conditions, the OLT that stops to cause owing to high and low end change of current shift position is inconsistent tests high end valve group overvoltage tripping under the special operation condition.
Should be understood that, application of the present invention is not limited to above-mentioned giving an example, and for those of ordinary skills, can be improved according to the above description or conversion, and all these improvement and conversion all should belong to the protection domain of claims of the present invention.
Claims (4)
1. bivalve group balance of voltage control method in the extra-high voltage direct-current transmission no-load applied voltage test is characterized in that, increases the coordination steering logic that high and low end bivalve group change of current variation is connect switch in utmost point control system, is specially:
Low end valve group group control system with increase a scale-of-two amount between the control bus of utmost point control system is communicated by letter, this scale-of-two amount is that low side change of current variation connects the switch controllable signal, by delivering to utmost point control system on the low end valve group group control system;
High end valve group group control system with increase by two scale-of-two amounts between the control bus of utmost point control system is communicated by letter, be respectively high-end change of current variation and connect the switch controllable signal, by delivering to utmost point control system on the high end valve group group control system, " OLT allows high end valve group change of current variation to connect the switch adjustment during test " signal is issued to high end valve group group control system by utmost point control system.
2. bivalve group balance of voltage control method in the extra-high voltage direct-current transmission no-load applied voltage test according to claim 1, it is characterized in that, the specific implementation process comprises: whether all utmost point control system connects the switch controlled comprehensive criterion that carries out to high and low end valve group change of current variation, if it is all controlled that high and low end valve group change of current variation connects switch, utmost point control system then adjusts signal by control bus to the group control system transmission permission shunting switch of high end valve group; If it is unusual that the high and low end change of current becomes arbitrary shunting switch, forbid that then high end valve component connects the switch adjustment.
3. bivalve group balance of voltage control method in the extra-high voltage direct-current transmission no-load applied voltage test, it is characterized in that, in utmost point control system, increase the coordination steering logic that high and low end bivalve group change of current variation is connect switch, be specially: " it is controlled that low side change of current variation connects switch " signal that low end valve group group control system produces is only extremely controlled system by the control bus transmission, and by the utmost point control system paramount end valve group of the transfer group control system of communicating by letter with the control bus of high end valve group group control system.
4. bivalve group balance of voltage control method in the extra-high voltage direct-current transmission no-load applied voltage test according to claim 3, it is characterized in that, the specific implementation process comprises: whether all the group control system of high end valve group connects the switch controlled comprehensive criterion that carries out to high and low end valve group change of current variation, if it is all controlled that high and low end change of current variation connects switch, then allow the group control system of high end valve group to adjust the shunting switch that its change of current becomes; If it is unusual that the high and low end change of current becomes arbitrary shunting switch, forbid that then the change of current variation of high end valve group connects the switch adjustment.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103647269A (en) * | 2013-11-18 | 2014-03-19 | 中国南方电网有限责任公司超高压输电公司广州局 | Series-connection dual valve bank balanced operation control method for ultra-high voltage direct-current transmission system |
| CN112968459A (en) * | 2021-02-05 | 2021-06-15 | 国网山西省电力公司检修分公司 | Tap control method based on fixed deviation alternate control of homopolar commutation variable tap |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6411529B1 (en) * | 1999-05-19 | 2002-06-25 | Abb Ab | Control for power plant |
| JP2007155599A (en) * | 2005-12-07 | 2007-06-21 | Nf Corp | Element test device |
| CN101383509A (en) * | 2008-10-17 | 2009-03-11 | 南方电网技术研究中心 | Extra-high voltage DC power transmission control system configuring method |
| CN101814732A (en) * | 2009-12-02 | 2010-08-25 | 南京南瑞继保电气有限公司 | Double 12-pulse valve bank coordinated-control method for ultra-high voltage direct-current transmission system |
-
2013
- 2013-08-01 CN CN201310333054.5A patent/CN103364670B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6411529B1 (en) * | 1999-05-19 | 2002-06-25 | Abb Ab | Control for power plant |
| JP2007155599A (en) * | 2005-12-07 | 2007-06-21 | Nf Corp | Element test device |
| CN101383509A (en) * | 2008-10-17 | 2009-03-11 | 南方电网技术研究中心 | Extra-high voltage DC power transmission control system configuring method |
| CN101814732A (en) * | 2009-12-02 | 2010-08-25 | 南京南瑞继保电气有限公司 | Double 12-pulse valve bank coordinated-control method for ultra-high voltage direct-current transmission system |
Non-Patent Citations (3)
| Title |
|---|
| NAIDOO1, P.: "Considerations for the Planning of UHVDC Schemes in Southern Africa", 《IEEE》, 31 December 2007 (2007-12-31), pages 1 - 7 * |
| R.RENDINA ET AL.: "The realization and commissioning of the ±500 kV 1000 MW HVDC link Sardinia Island – Italian Peninsula (SAPEI)", 《CIGRE 2012》, 31 December 2012 (2012-12-31), pages 1 - 11 * |
| 刘宣宣: "云广直流输电工程空载加压试验分析", 《电力建设》, vol. 32, no. 8, 31 August 2011 (2011-08-31), pages 45 - 48 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103647269A (en) * | 2013-11-18 | 2014-03-19 | 中国南方电网有限责任公司超高压输电公司广州局 | Series-connection dual valve bank balanced operation control method for ultra-high voltage direct-current transmission system |
| CN103647269B (en) * | 2013-11-18 | 2015-09-09 | 中国南方电网有限责任公司超高压输电公司广州局 | A kind of extra-high voltage DC transmission system series connection bivalve group balance movement control method |
| CN112968459A (en) * | 2021-02-05 | 2021-06-15 | 国网山西省电力公司检修分公司 | Tap control method based on fixed deviation alternate control of homopolar commutation variable tap |
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