CN101242099A - Realization method for multi-unit power coordination control of back-to-back DC power transmission system - Google Patents
Realization method for multi-unit power coordination control of back-to-back DC power transmission system Download PDFInfo
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- CN101242099A CN101242099A CNA200710195660XA CN200710195660A CN101242099A CN 101242099 A CN101242099 A CN 101242099A CN A200710195660X A CNA200710195660X A CN A200710195660XA CN 200710195660 A CN200710195660 A CN 200710195660A CN 101242099 A CN101242099 A CN 101242099A
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Abstract
An achieving method of multi-unit power collaborating control for a back-to-back direct current power transmitting system uses the full station power collaborating control functional module in the station-control host machine to calculate the power setting value of each current-shifting unit in each operating period of the program according to ascending, descending, emergency power distribution of the full station power; the is method transmits the power setting value to each current-shifting unit via the CAM bus, TDM bus, eTDM bus and other bus forms; and according to the power measuring value of each current-shifting unit, this method adjusts the power setting value of each current-shifting unit in real-time way and achieves the closed loop control of the full station power setting value and power setting value of each current-shifting unit.
Description
Technical field
The present invention designs the new implementation method of back-to-back DC power transmission system multi-unit power coordination control, specifically adopt field bus technique, the full station gross power of all calculating the power definite value of each convertor unit in real time according to the power measurement values of each convertor unit and adjusting the power definite value of each convertor unit in each cycle of operation of station control program is coordinated the method for control.
Background technology
Sometimes have a plurality of convertor units in current conversion station of back-to-back DC power transmission system at present, the rectification side of a plurality of convertor units and inversion side are connected on the current conversion station ac bus, the control of each convertor unit is finished by convertor unit main control system separately, the gross power at full station is distributed to the main control system of each convertor unit by current conversion station station control system host, usually the back-to-back DC power transmission system multi-unit power coordination is controlled and is adopted hard-wired method to realize power coordination control usually, and value and power reference is by the process LAN of direct current station control system each convertor unit control system of sending to off the net.After receiving new value and power reference, obtain full station gross power deviation according to current power reference value and full station actual power value, this deviation is being participated in directly giving each convertor unit control system after the mean allocation between the coordination control unit, adjust the power definite value of this convertor unit according to deviate by each convertor unit control system, finish power adjustments until this unit, in the power adjustment procedure of each convertor unit, the control system of standing does not adjust the power definite value of each convertor unit according to the power delivery value of each convertor unit.Control main frame in this method station issues the power definite value for each convertor unit by the LAN net, and the speed and the reliability of transfer of data are lower than fieldbus; This method power definite value of each convertor unit that can not upgrade in time according to the power delivery situation of each unit in addition, if after certain convertor unit receives the power definite value of controlling of arriving at a station, in power adjustment procedure, can not finally reach the power definite value that the station control requires, the reallocation of power definite value between a plurality of unit can not be in time carried out in the control of standing, and therefore need realize the supervision of each cell power value and the real time coordination distribution of power definite value by new method.
Summary of the invention
The object of the present invention is to provide a kind of new method of back-to-back DC power transmission system multi-unit power coordination control.The station control main frame that utilization has a full station gross power controlled function is in each computation of Period of program running and upgrade the new power definite value of each convertor unit, upgrade the power definite value of each convertor unit in the process that is implemented in each convertor unit power rising or descends timely, guarantee to finish timely between each convertor unit mutual urgent power and support.The control main frame of standing issues the power definite value for the main control system of each convertor unit by fieldbus.
Description of drawings
Accompanying drawing 1 illustrates the overall construction drawing of back-to-back DC power transmission system multi-unit power coordination control method, represents a plurality of convertor units with two convertor units among the figure.Wherein each Reference numeral is expressed as:
1. the gross power coordinated control function of standing full module; 2. fieldbus 3 (delivery unit 1 power definite value and unit 1 power measurement values and other signal); 3. fieldbus 4 (delivery unit 2 power definite values and unit 2 power measurement values and other signal); 4. DC control and measuring-signal; 5. current conversion station ac bus; 6. dc voltage and current measuring equipment; 7. converter valve; 8. smoothing reactor; 9. converter transformer.
Embodiment
At the problem of each convertor unit power definite value that can not upgrade in time in a plurality of convertor unit power of the above back-to-back DC power transmission system lifting process, the present invention proposes the new method of back-to-back DC power transmission system multi-unit power coordination control.At first 1. the full station gross power coordinated control function module in the station of current conversion station station key-course control main frame calculates the power definite value of each convertor unit with the time interval of program computing cycle, 2. and 3. the power definite value of each convertor unit is given the main control system of convertor unit 1 and convertor unit 2 respectively by fieldbus, 4. each convertor unit main control system sends this power definite value to each convertor unit with control signal after calculating, 4. each convertor unit main control system gathers measuring-signal simultaneously, after the main control system of convertor unit 1 and convertor unit 2 calculates the performance number of current each convertor unit according to the voltage and current signal that collects, should value 2. and 3. be uploaded to current conversion station station control main frame by fieldbus, 1. the control main frame gross power coordinated control function module of standing entirely of standing calculates the new power definite value of each convertor unit according to the power actual value of each convertor unit at next program computing cycle, and will be worth the main control system that sends each convertor unit according to above-mentioned approach to.
After adopting this new full station gross power to coordinate the method for control, can realize the fast closed-loop control of the power modulation between current conversion station station key-course, convertor unit main control system, convertor unit.If convertor unit 1 causes convertor unit 1 urgent locking owing to failure and other reasons in the power lifting process, this moment is for full station, the power of convertor unit 1 loss is exactly the power of full station loss, full station gross power coordination control this moment can be after convertor unit 1 urgent locking, recomputate the power definite value of convertor unit 2 at the computing cycle (about 1ms) of next program, owing to the full station power loss that convertor unit 1 urgent locking causes, realized that the urgent power between each convertor unit is supported by convertor unit 2 compensation fast as much as possible.
Claims (4)
1, the implementation method of back-to-back DC power transmission system multi-unit power coordination control, it is characterized in that: for back-to-back DC power transmission system with a plurality of convertor units, full station gross power coordinated control function module realizes multi-unit power coordination closed-loop control function in the station by fieldbus, full station gross power coordinated control function module is monitored the actual fed performance number of each convertor unit in real time, and adjusts the power definite value of each convertor unit in real time according to system status.
2, the method for claim 1 is characterized in that: the gross power of standing full coordinated control function module form with software in station control main frame realizes.
3, method according to claim 1 is characterized in that fieldbus adopts the bus form of CAN, TDM, eTDM.
4, according to claim 1 and 2 described methods, the full station gross power coordinated control function in the control main frame of it is characterized in that standing is calculated the power definite value of each convertor unit according to each cycle of operation of the power climbing speed follow procedure of full station power definite value and setting, and this definite value is handed down to each convertor unit as the current power definite value of this convertor unit by fieldbus, the current power measured value of each convertor unit is uploaded to the full station gross power coordinated control function module of station control main frame, full station gross power coordinated control function module is adjusted the power definite value of program at next each convertor unit of execution cycle according to the power measurement values of each convertor unit that collects, thereby realize the coordination control of each convertor unit power, be formed in full station gross power and rise, descend, full station gross power coordinated control function is controlled with the real-time closed-loop between a plurality of convertor unit power definite value during urgent power division.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB200710195660XA CN100499309C (en) | 2007-12-05 | 2007-12-05 | Realization method for multi-unit power coordination control of back-to-back DC power transmission system |
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| CNB200710195660XA CN100499309C (en) | 2007-12-05 | 2007-12-05 | Realization method for multi-unit power coordination control of back-to-back DC power transmission system |
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| CN101242099A true CN101242099A (en) | 2008-08-13 |
| CN100499309C CN100499309C (en) | 2009-06-10 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101924392A (en) * | 2010-08-04 | 2010-12-22 | 南京南瑞继保电气有限公司 | Bipolar automatic power control method of high-voltage direct-current transmission |
| CN103326403A (en) * | 2013-05-23 | 2013-09-25 | 国家电网公司 | Direct current system emergency power support method based on general principle of dynamics |
| CN104268741A (en) * | 2014-09-19 | 2015-01-07 | 国家电网公司 | Method for setting alarm for convertor station power increasing and decreasing |
| CN104333012A (en) * | 2014-11-06 | 2015-02-04 | 国家电网公司 | Multi-feed flexible DC transmission reactive power control method and device |
| CN106911131A (en) * | 2015-12-22 | 2017-06-30 | 国网智能电网研究院 | A kind of em ergency power support control method of AC network subregion interconnect device |
| CN111769549A (en) * | 2020-06-17 | 2020-10-13 | 中国南方电网有限责任公司 | Emergency power distribution method suitable for extra-high voltage three-terminal hybrid direct current |
-
2007
- 2007-12-05 CN CNB200710195660XA patent/CN100499309C/en active Active
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101924392A (en) * | 2010-08-04 | 2010-12-22 | 南京南瑞继保电气有限公司 | Bipolar automatic power control method of high-voltage direct-current transmission |
| CN101924392B (en) * | 2010-08-04 | 2012-10-03 | 南京南瑞继保电气有限公司 | Bipolar automatic power control method of high-voltage direct-current transmission |
| CN103326403A (en) * | 2013-05-23 | 2013-09-25 | 国家电网公司 | Direct current system emergency power support method based on general principle of dynamics |
| CN103326403B (en) * | 2013-05-23 | 2015-11-04 | 国家电网公司 | A kind of direct current system emergency DC power support method based on broad sense principle of dynamics |
| CN104268741A (en) * | 2014-09-19 | 2015-01-07 | 国家电网公司 | Method for setting alarm for convertor station power increasing and decreasing |
| CN104268741B (en) * | 2014-09-19 | 2018-07-20 | 国家电网公司 | A kind of alarm clock setting method of current conversion station lifting power operation |
| CN104333012A (en) * | 2014-11-06 | 2015-02-04 | 国家电网公司 | Multi-feed flexible DC transmission reactive power control method and device |
| CN104333012B (en) * | 2014-11-06 | 2016-08-10 | 国家电网公司 | A kind of many feed-ins flexible DC power transmission reactive power control method and device |
| CN106911131A (en) * | 2015-12-22 | 2017-06-30 | 国网智能电网研究院 | A kind of em ergency power support control method of AC network subregion interconnect device |
| CN106911131B (en) * | 2015-12-22 | 2020-08-18 | 国网智能电网研究院 | Emergency power support control method for AC power grid partition interconnection device |
| CN111769549A (en) * | 2020-06-17 | 2020-10-13 | 中国南方电网有限责任公司 | Emergency power distribution method suitable for extra-high voltage three-terminal hybrid direct current |
| CN111769549B (en) * | 2020-06-17 | 2023-12-15 | 中国南方电网有限责任公司 | Emergency power distribution method suitable for extra-high voltage three-terminal hybrid direct current |
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| Publication number | Publication date |
|---|---|
| CN100499309C (en) | 2009-06-10 |
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Effective date of registration: 20090612 Address after: Dongcheng District, Beijing, Beijing Railway Station 19 West Tong Tong Building, zip code: 100005 Co-patentee after: Beijing Wanglian HVDC Engineering Technology Co., Ltd. Patentee after: National network DC Engineering Construction Co., Ltd. Address before: Dongcheng District, Beijing, Beijing Railway Station 19 West Tong Tong Building, zip code: 100005 Patentee before: State Grid DC Project Construction Co., Ltd. |
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