CN107994600B - Rapid control method for flexible direct current transmission technology - Google Patents
Rapid control method for flexible direct current transmission technology Download PDFInfo
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- CN107994600B CN107994600B CN201711316583.9A CN201711316583A CN107994600B CN 107994600 B CN107994600 B CN 107994600B CN 201711316583 A CN201711316583 A CN 201711316583A CN 107994600 B CN107994600 B CN 107994600B
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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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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/268—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured for dc systems
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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
- H02J3/01—Arrangements for reducing harmonics or ripples
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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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
-
- 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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
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Abstract
The invention provides a quick control method for a flexible direct current transmission technology, which divides a plurality of control board cards in a valve control unit into two types of control period board cards according to tasks: a fast control period board card and a slow control period board card. A quick control period sectional type processing method is adopted in a quick control period board card and comprises a main CPU control period, a PCP communication period, a sequencing algorithm control period and a unit communication control period, the time lengths of the three control periods are equal, the three control periods are arranged in a pipeline state, and two adjacent control periods are overlapped in time. A method for prolonging the control period time is adopted in the slow control period board card, and the control period in the slow control period board card is set to be a control period which is several times as long as the time length of the control period of the main CPU. The control period of the flexible direct current transmission valve control system can be effectively shortened, so that various adverse effects on the control effect caused by overlong control period can be avoided.
Description
Technical Field
The invention relates to the field of high-voltage direct-current transmission of a power system, in particular to a valve control method of a high-current high-voltage flexible direct-current transmission converter valve.
Background
As shown in fig. 1, the flexible dc power transmission system apparatus generally includes (from the upper layer to the lower layer): the system comprises a station control protection system, a pole control protection device, a converter valve control system (comprising a valve control cabinet and a pulse distribution cabinet) and a converter valve. The station control protection system is the brain of the flexible direct current transmission system and guarantees safe, reliable and stable operation of the direct current transmission system; the converter valve is a core component of the direct current transmission system; the pole control protection device (PCP) needs to calculate modulation commands according to system information, and the valve control system receives the modulation commands, further calculates the modulation commands and then specifically controls thousands of units on the converter valve, so that the calculation amount of the valve control system is large.
The general valve control system is composed of the following main parts: the system comprises a main control board card, a sequencing operation board, a pulse distribution box, a unit local control board card and a series of valve control and external communication board cards. The main control board card is responsible for controlling the whole current converter such as the circulation suppression; the sequencing operation board is responsible for the production of control instructions of all units and communicates with the pulse distribution box; the pulse distribution box is responsible for issuing the instruction of the operation panel to the unit and feeding back the state of the unit to the sequencing operation panel; the unit local control board is responsible for communicating with the pulse distribution box and carrying out control, state acquisition and other work on the unit.
Most of the existing flexible direct current transmission systems adopt a nearest level approximation modulation algorithm for modulation control, and the basic idea is as follows: when the number of the levels is enough based on the Modular Multilevel Converter (MMC), the modulated wave can be directly approached by instantaneous level superposition by using the step wave, and a method of pulse width control is not needed. The recent level approximation modulation method has low switching frequency and low switching loss, and the realization mode is simpler because the pulse width does not need to be controlled. When the MMC is applied to high-voltage and high-power direct-current transmission, in order to meet the system requirements, the number of submodules generally connected in series on each phase of bridge arm of the MMC is many, and is often hundreds.
The existing valve control system controls the sub-modules in a single control cycle manner, that is, the time length from the time when the main CPU receives a modulation command sent by the PCP to the time when the final unit executes the control command is one control cycle. The control period is long due to the excessive amount of calculations, communication and the number of units to be controlled by the valve control system.
A longer control period can cause several disadvantages. 1) The low frequency capacitance switching results in a higher total harmonic distortion rate on the ac side. 2) Effectively reduces the peak value of the capacitor voltage. 3) The whole delay of the valve-level control protection system is long, so that the rapid protection of serious faults such as direct-current bipolar short circuit and the like and the ride-through of alternating-current side faults are not facilitated.
Disclosure of Invention
In order to solve the problems in the background art, the invention provides a quick control method for a flexible direct current transmission technology, which can effectively shorten the control period of a control system of the flexible direct current transmission valve so as to avoid various adverse effects on the control effect caused by overlong control period.
In order to achieve the purpose, the invention adopts the following technical scheme:
a quick control method for a flexible direct current transmission technology is a task control method among a plurality of control board cards in a valve control unit in a flexible direct current transmission system MMC.
Dividing a plurality of control board cards in the valve control unit into two types of control period board cards according to tasks: a fast control period board card and a slow control period board card.
The quick control period board card is a board card comprising the following tasks: the tasks include communication between the valve control system and the PCP; calculating and issuing a control instruction of a main CPU; unit sequencing operation and communication between pulse distribution boxes; communication between the impulse distribution box and the cell.
The slow control period board card is a board card with the following tasks: the tasks comprise communication of control and valve control monitoring equipment; communication between the valve control and station control SCADA systems; communication between the valve control and wave recording software; valve control and communication between the exterior such as key lamp control points.
A quick control period sectional type processing method is adopted in a quick control period board card and comprises a main CPU control period, a PCP communication period, a sequencing algorithm control period and a unit communication control period, the time lengths of the three control periods are equal, the three control periods are arranged in a pipeline state, and two adjacent control periods are overlapped in time.
A sectional processing method is not adopted in the slow control period board card, but a method of lengthening the control period time is adopted, and the control period in the slow control period board card is set to be a control period which is several times as long as the time length of the control period of the main CPU.
The quick control period sectional type processing method adopted in the quick control period board card specifically comprises the following steps:
the method comprises the following steps: a _ x represents the control and communication period with the PCP of the main CPU, B _ x represents the sequencing operation period, and C _ x represents the communication control period of the pulse box and the unit; the following steps are steps of a single control cycle;
step one, in the process of a first period A _0 of a main CPU, the main CPU calculates a transmitted control command and transmits data before the A _0 period is finished;
step two, the control instruction of the main CPU and the unit state information uploaded by the pulse box are required to be received at the beginning part of the first cycle B _0 of the sequencing operation to serve as input data of the sequencing operation, and the part is overlapped with the issuing time period of the control cycle A _0 of the main CPU in terms of time; the sorting operation board performs sorting calculation after receiving the data, and sends a calculated sorting instruction to the pulse box before B _0 is finished;
step three, the issued data of the sequencing operation period B _0 needs to be received at the beginning part of the pulse box and the unit control period C _0, and the part is overlapped with the sequencing operation period B _0 in time; after receiving the control command issued in the B _0 period, issuing the control command to the unit, executing the switching action of the IGBT tube by the unit according to the command, and sending the state data of the unit to the pulse box; the pulse box uploads the data obtained by synthesis to the operation sorting board at the end of the control period C _0 of the pulse box unit so as to be used by the operation sorting board in the control period B _2 for sorting calculation;
step four, the sequencing operation board uses the unit data fed back by the control period of the C _0 pulse box unit and the command of the main CPU period A _2 to perform sequencing calculation in the operation sequencing period B _2, feeds the synthesized unit information back to the main CPU period A _4, and sends a control command to the pulse unit period C _ 2;
and step five, the main CPU control period A _4 continues to calculate the control command after receiving the data, and sends the operation result to the operation sorting board before the period A _4 is finished.
Compared with the prior art, the invention has the beneficial effects that:
according to the quick control period sectional type processing method in the quick control method of the flexible direct current transmission technology, input data required by calculation of each control period are all sent by the control period of the last time period of the adjacent control periods; the calculation instruction and the feedback data generated by each control period of each kind of control period are transmitted to the next control period time of the adjacent kind of control period for utilization. The time length of the control period of the whole system can be effectively reduced through various control period classifications and current status arrangement of the system, the control delay of the system is reduced, and finally the total harmonic distortion rate of the alternating current side can be effectively reduced, the peak value of the capacitor voltage is reduced, and the system is beneficial to the rapid protection of serious faults such as direct current double-pole short circuit and the like and the occurrence of faults such as the ride-through of faults of the alternating current side and the like.
Drawings
Fig. 1 is a structure diagram of a simple system of a conventional flexible direct current power transmission system;
FIG. 2 is a flow chart of a control cycle of the present invention;
FIG. 3 is a flow chart of a control cycle of the control system prior to modification;
FIG. 4 is a schematic diagram of three fast control cycle time ordering modes and data transfers according to an embodiment of the present invention;
fig. 5 is a schematic diagram of time relationships of three fast control periods in the nth control period according to an embodiment of the present invention.
Detailed Description
The following detailed description of the present invention will be made with reference to the accompanying drawings.
A quick control method for a flexible direct current transmission technology is a task control method among a plurality of control board cards in a valve control unit in a flexible direct current transmission system MMC.
Dividing a plurality of control board cards in the valve control unit into two types of control period board cards according to tasks: a fast control period board card and a slow control period board card.
The quick control period board card is a board card comprising the following tasks: the tasks include communication between the valve control system and the PCP; calculating and issuing a control instruction of a main CPU; unit sequencing operation and communication between pulse distribution boxes; communication between the impulse distribution box and the cell.
The slow control period board card is a board card with the following tasks: the tasks comprise communication of control and valve control monitoring equipment; communication between the valve control and station control SCADA systems; communication between the valve control and wave recording software; valve control and communication between the exterior such as key lamp control points.
A quick control period sectional type processing method is adopted in a quick control period board card and comprises a main CPU control period, a PCP communication period, a sequencing algorithm control period and a unit communication control period, the time lengths of the three control periods are equal, the three control periods are arranged in a pipeline state, and two adjacent control periods are overlapped in time.
A sectional processing method is not adopted in the slow control period board card, but a method of lengthening the control period time is adopted, and the control period in the slow control period board card is set to be a control period which is several times as long as the time length of the control period of the main CPU.
As shown in fig. 3, for the control period scheme before the improvement, as shown in fig. 2, for the control period scheme after the improvement, in fig. 2, the upper part is a slow control period, and the lower part is a fast control period divided into three segments, where the three segments are: the main CPU controls and communicates with PCP cycle, sequencing algorithm control cycle and unit communication control cycle.
As shown in fig. 4, the method for processing the fast control period in a segmented manner, which is adopted in the fast control period board, specifically includes the following steps:
the method comprises the following steps: a _ x represents the control and communication period with the PCP of the main CPU, B _ x represents the sequencing operation period, and C _ x represents the communication control period of the pulse box and the unit; the following steps are steps of a single control cycle;
step one, in the process of a first period A _0 of a main CPU, the main CPU calculates a transmitted control command and transmits data before the A _0 period is finished; the step identified in the figure is indicated by the arrow a0_ 1.
Step two, the control instruction of the main CPU and the unit state information uploaded by the pulse box are required to be received at the beginning part of the first cycle B _0 of the sequencing operation to serve as input data of the sequencing operation, and the part is overlapped with the issuing time period of the control cycle A _0 of the main CPU in terms of time; the sorting operation board performs sorting calculation after receiving the data, and sends a calculated sorting instruction to the pulse box before B _0 is finished; indicated by the arrow B0_1 in the figure.
Step three, the issued data of the sequencing operation period B _0 needs to be received at the beginning part of the pulse box and the unit control period C _0, and the part is overlapped with the sequencing operation period B _0 in time; after receiving the control command issued in the B _0 period, issuing the control command to the unit, executing the switching action of the IGBT tube by the unit according to the command, and sending the state data of the unit to the pulse box; the pulse box uploads the data obtained by synthesis to the operation sorting board at the end of the control period C _0 of the pulse box unit so as to be used by the operation sorting board in the control period B _2 for sorting calculation; as indicated by the arrow C0_1 in the figure.
Step four, the sequencing operation board uses the unit data fed back by the control period of the C _0 pulse box unit and the command of the main CPU period A _2 to perform sequencing calculation in the operation sequencing period B _2, feeds the synthesized unit information back to the main CPU period A _4, and sends a control command to the pulse unit period C _ 2;
and step five, the main CPU control period A _4 continues to calculate the control command after receiving the data, and sends the operation result to the operation sorting board before the period A _4 is finished.
The above steps are described for a single control cycle only, and the following is a control description for any control cycle:
as shown in FIG. 5, when the control commands for the pulse unit control period C _ n are both the main CPU period A _ n and the sequencing operation period B _ n, the data for the main CPU period A _ n are both the feedback data of the sequencing operation period B _ n-2 and the pulse unit control period C _ n-4.
In order to ensure the stability of the control period, the time length of the slow control period needs to be an integral multiple of the time length of the fast control period. The time length of the slow control period in this embodiment is 6 times the time length of the fast control period.
The method for reducing the control period of the flexible direct current transmission converter valve control system provided by the embodiment of the invention comprises the following steps: the valve control system is divided into two fast control periods and a slow control period according to functions, wherein the fast control period is divided into three parts; the two control periods exist in parallel, and the time lengths of the two control periods have a stable integral multiple relation for the stability of control; the three parts of rapid control periods are arranged in a streamline way; the input data required by the calculation of each control cycle are all sent by the control cycle of the previous time period of the adjacent control cycles; the calculation instruction and the feedback data generated by each control period of each kind of control period are transmitted to the next control period time of the adjacent kind of control period for utilization. The time length of the control period of the whole system can be effectively reduced through various control period classifications and current status arrangement of the system, the control delay of the system is reduced, and finally the total harmonic distortion rate of the alternating current side can be effectively reduced, the peak value of the capacitor voltage is reduced, and the system is beneficial to the rapid protection of serious faults such as direct current double-pole short circuit and the like and the occurrence of faults such as the ride-through of faults of the alternating current side and the like.
The above embodiments are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are given, but the scope of the present invention is not limited to the above embodiments. The methods used in the above examples are conventional methods unless otherwise specified.
Claims (1)
1. A quick control method of a flexible direct current transmission technology is a task control method among a plurality of control board cards in a valve control unit in a flexible direct current transmission system MMC;
the method is characterized in that a plurality of control board cards in the valve control unit are divided into two types of control period board cards according to tasks: a fast control period board card and a slow control period board card;
the quick control period board card is a board card comprising the following tasks: the tasks include communication between the valve control system and the PCP; calculating and issuing a control instruction of a main CPU; unit sequencing operation and communication between pulse distribution boxes; communication between the pulse distribution box and the unit;
the slow control period board card is a board card with the following tasks: the tasks comprise communication of control and valve control monitoring equipment; communication between the valve control and station control SCADA systems; communication between the valve control and wave recording software; valve control and communication between each external control point such as a key lamp;
the quick control period board card adopts a quick control period sectional type processing method which comprises a main CPU control period, a PCP communication period, a sequencing algorithm control period and a unit communication control period, wherein the time lengths of the three control periods are equal, the three control periods are arranged in a pipeline state, and two adjacent control periods are overlapped in time;
a sectional processing method is not adopted in the slow control period board card, but a method of lengthening the control period time is adopted, and the control period in the slow control period board card is set to be a control period which is several times as long as the time length of the control period of the main CPU;
the quick control period sectional type processing method adopted in the quick control period board card specifically comprises the following steps:
the method comprises the following steps: a _ x represents the control and communication period with the PCP of the main CPU, B _ x represents the sequencing operation period, and C _ x represents the communication control period of the pulse box and the unit; the following steps are steps of a single control cycle;
step one, in the process of a first period A _0 of a main CPU, the main CPU calculates a transmitted control command and transmits data before the A _0 period is finished;
step two, the control instruction of the main CPU and the unit state information uploaded by the pulse box are required to be received at the beginning part of the first cycle B _0 of the sequencing operation to serve as input data of the sequencing operation, and the part is overlapped with the issuing time period of the control cycle A _0 of the main CPU in terms of time; the sorting operation board performs sorting calculation after receiving the data, and sends a calculated sorting instruction to the pulse box before B _0 is finished;
step three, the issued data of the sequencing operation period B _0 needs to be received at the beginning part of the pulse box and the unit control period C _0, and the part is overlapped with the sequencing operation period B _0 in time; after receiving the control command issued in the B _0 period, issuing the control command to the unit, executing the switching action of the IGBT tube by the unit according to the command, and sending the state data of the unit to the pulse box; the pulse box uploads the data obtained by synthesis to the operation sorting board at the end of the control period C _0 of the pulse box unit so as to be used by the operation sorting board in the control period B _2 for sorting calculation;
step four, the sequencing operation board uses the unit data fed back by the control period of the C _0 pulse box unit and the command of the main CPU period A _2 to perform sequencing calculation in the operation sequencing period B _2, feeds the synthesized unit information back to the main CPU period A _4, and sends a control command to the pulse unit period C _ 2;
and step five, the main CPU control period A _4 continues to calculate the control command after receiving the data, and sends the operation result to the operation sorting board before the period A _4 is finished.
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| CN109120000B (en) * | 2018-07-27 | 2020-09-08 | 南方电网科学研究院有限责任公司 | Method for reducing link delay in flexible direct current system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102931652A (en) * | 2011-12-28 | 2013-02-13 | 许继集团有限公司 | Modular multi-level flexible DC power transmission valve control system and pole control system communication method |
| CN103439967A (en) * | 2013-08-23 | 2013-12-11 | 南方电网科学研究院有限责任公司 | Closed loop test system of flexible direct current transmission control protection system |
| CN104076693A (en) * | 2014-06-03 | 2014-10-01 | 南方电网科学研究院有限责任公司 | Flexible direct-current transmission real-time simulation system and simulation method thereof |
| CN104914746A (en) * | 2015-04-16 | 2015-09-16 | 北京荣信慧科科技有限公司 | MMC converter valve control device based on flexible DC power transmission and control method |
| CN105137212A (en) * | 2015-06-11 | 2015-12-09 | 中国西电电气股份有限公司 | Method for realizing short-circuit test between pole lines of converter valve by using high-speed power electronic switch |
| CN107329444A (en) * | 2017-06-26 | 2017-11-07 | 国网江苏省电力公司 | A kind of comprehensive energy Multiple Time Scales coordinated control system and method |
-
2017
- 2017-12-12 CN CN201711316583.9A patent/CN107994600B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102931652A (en) * | 2011-12-28 | 2013-02-13 | 许继集团有限公司 | Modular multi-level flexible DC power transmission valve control system and pole control system communication method |
| CN103439967A (en) * | 2013-08-23 | 2013-12-11 | 南方电网科学研究院有限责任公司 | Closed loop test system of flexible direct current transmission control protection system |
| CN104076693A (en) * | 2014-06-03 | 2014-10-01 | 南方电网科学研究院有限责任公司 | Flexible direct-current transmission real-time simulation system and simulation method thereof |
| CN104914746A (en) * | 2015-04-16 | 2015-09-16 | 北京荣信慧科科技有限公司 | MMC converter valve control device based on flexible DC power transmission and control method |
| CN105137212A (en) * | 2015-06-11 | 2015-12-09 | 中国西电电气股份有限公司 | Method for realizing short-circuit test between pole lines of converter valve by using high-speed power electronic switch |
| CN107329444A (en) * | 2017-06-26 | 2017-11-07 | 国网江苏省电力公司 | A kind of comprehensive energy Multiple Time Scales coordinated control system and method |
Non-Patent Citations (1)
| Title |
|---|
| 《Efficient modeling of hybrid MMCs for HVDC systems》;Lei Zhang等;《2017 IEEE Energy Conversion Congress and Exposition (ECCE)》;20171107;1629-1633页 * |
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Address after: 114000 212 Yue Ling Road, Anshan, Liaoning Patentee after: Rongxin Huike Electric Co.,Ltd. Patentee after: China Southern Power Grid Research Institute Co.,Ltd. Patentee after: MONTNETS RONGXIN TECHNOLOGY GROUP Co.,Ltd. Address before: 114000 212 Yue Ling Road, Anshan, Liaoning Patentee before: RONGXIN HUIKE ELECTRIC TECHNOLOGY Co.,Ltd. Patentee before: China Southern Power Grid Research Institute Co.,Ltd. Patentee before: MONTNETS RONGXIN TECHNOLOGY GROUP Co.,Ltd. |
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