CN103036404B - Timing sequence design method of dicycle information acquisition and processing execution in turns - Google Patents
Timing sequence design method of dicycle information acquisition and processing execution in turns Download PDFInfo
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- CN103036404B CN103036404B CN201210535506.3A CN201210535506A CN103036404B CN 103036404 B CN103036404 B CN 103036404B CN 201210535506 A CN201210535506 A CN 201210535506A CN 103036404 B CN103036404 B CN 103036404B
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Abstract
The invention provides a timing sequence design method of dicycle information acquisition and processing execution in turns. The method include a first step of collecting sent block valve information of a bridge arm segmentation control unit in T1 period, and a second step of processing and comprehensively ranking the collected block valve information in T 2 period. A layering and segmenting type collecting and processing structure solves the problem of the limits to collecting ability and processing ability of large-scale submodule module information from valve base control equipment. The collection and processing can be carried out in a dicycle mode in turns. The formation of a microsecond level decision of enormous collecting and processing information is guaranteed. A dicycle achievement is adopted, the adopted method is that an acquisition cycle and a processing and counting period run in turns, and therefore whole voltage balance effect collected and controlled by a bridge arm is macroscopic and reasonable.
Description
Technical field
The invention belongs to electric and electronic technical field, be specifically related to a kind of binary cycle information gathering and process the time sequence design method performed in turn.
Background technology
Current, the various Power Electronic Circuit based on all-controlling power electronics device IGBT are applied to the fields such as electric power system, locomotive traction, Aero-Space more and more.Along with the development of power electronic technology and material, manufacturing process, the through-current capability of IGBT device is also more and more stronger, makes it also obtain important performance space in direct current transportation field, directly facilitates birth and the development of Technology of HVDC based Voltage Source Converter.Different from traditional high voltage dc transmission technology, flexible direct-current transmission converter instead of Thyristors in series converter valve with the high-voltage commutation valve in series by IGBT, defines the flexible direct current converter of voltage-source type.Flexible DC power transmission can realize powering to remote middle-size and small-size isolated, weak load; Independent ,/Reactive Power Control of accurately, flexibly gaining merit can be carried out, improve economy and the stability of system load flow transmission; When trend is reversed, DC voltage polarity is constant, conveniently forms multi-terminal direct current transmission system; Not increasing the capacity of short circuit of system when being connected system short-circuit, being conducive to limiting short-circuit current, stop the fault pervasion of system; Reactive power support and FREQUENCY CONTROL can be provided, have special advantage for the regenerative resource such as wind energy turbine set and distributed power generation is grid-connected; Black starting-up power supply can be provided after the electric network fault that is connected, accelerate the fast restoration capabilities after electric network fault; Current conversion station floor space greatly reduces relative to conventional DC.
The performance advantage that Technology of HVDC based Voltage Source Converter enriches has attracted numerous scientific research technical staff to put in relevant research and practical work, its flexibly control performance also make the Control protection method of flexible direct current and control protective unit become the study hotspot of flexible direct current technology.In the control of the flexible direct current based on modular multi-level converter topological structure, be a very important link in whole Control protection system to the Control protection of converter submodule inside.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the invention provides a kind of binary cycle information gathering and process the time sequence design method performed in turn, the acquisition process structure of layer and section formula solves the problem of valve base control appliance to the acquisition and processing capabilities limits of extensive submodule information, binary cycle carries out acquisition and processing thought in turn, ensure that the Microsecond grade decision-making of huge Information Monitoring and process is formed; Take binary cycle to realize, collection period and process computing cycle operational mode in turn, make brachium pontis gather the balance of voltage effect controlling overall brachium pontis more macroscopical reasonable.
In order to realize foregoing invention object, the present invention takes following technical scheme:
A kind of binary cycle information gathering be provided and process the time sequence design method performed in turn, said method comprising the steps of:
Step 1: gather the sectioning valve information in the T1 cycle, brachium pontis segment control unit sent;
Step 2: within the T2 cycle, process and integrated ordered is carried out to gathered sectioning valve information.
Described sectioning valve information comprise all submodules of this segmentation voltage and, bypass count, operation information and error protection information.
The described T1 cycle is divided into t1 ~ t2 time period and t2 ~ t3 time period; The described T2 cycle is divided into t3 ~ t4 time period and t4 ~ t5 time period.
Described step 1 comprises the following steps:
Step 1-1:t1 ~ in the t2 time period, according to the modulation intelligence that circulation control unit issues, adopt bridge arm voltage balanced algorithm, form the modulation voltage information that each brachium pontis segment control unit needs, and send to each brachium pontis segment control unit;
Step 1-2:t2 ~ in the t3 time period, brachium pontis gathers control unit and gathers the sectioning valve information that each brachium pontis segment control unit send respectively, ensures that all collection is complete; Arrange sectioning valve information, gather and upload the sectioning valve information of whole brachium pontis and Control protection information to circulation control unit.
Brachium pontis gathers the mode that control unit is marked by poll and flag bit, gathers the sectioning valve information that each brachium pontis segment control unit send, and guarantees that receiving the information gathered does not repeat to receive, and does not accept and believe breath and does not miss.
Described step 2 comprises the following steps:
Step 2-1:t3 ~ in the t4 time period, according to the modulation intelligence that circulation control unit issues, adopt bridge arm voltage balanced algorithm, forms the modulation voltage information that each segment control unit of brachium pontis needs, sends to each brachium pontis segment control unit;
Step 2-2:t4 ~ in the t5 time period, sorted, and arrange sectioning valve information by the average voltage of bubbling method to each brachium pontis segment control unit, is gathered and uploads the sectioning valve information of whole brachium pontis and Control protection information to circulation control unit.
Described bridge arm voltage balanced algorithm carries out macro-control to the average voltage of each segmentation of whole brachium pontis, and each segmentation submodule average voltage is consistent as much as possible; Obtained the information of each brachium pontis segment control unit current period needs modulation by bridge arm voltage balanced algorithm, send to each brachium pontis segment control unit respectively.
Compared with prior art, beneficial effect of the present invention is:
1. the acquisition process structure of layer and section formula solves the problem of valve base control appliance to the acquisition and processing capabilities limits of extensive submodule information, binary cycle carries out acquisition and processing thought in turn, ensure that the Microsecond grade decision-making of huge Information Monitoring and process is formed;
2. take binary cycle to realize, collection period and process computing cycle operational mode in turn, make brachium pontis gather the balance of voltage effect controlling overall brachium pontis more macroscopical reasonable;
3. during binary cycle, ordered pair switching time, system sequence, without any impact, to balance of voltage effect and system protection etc. without any restriction, and greatly enhance reliability and the fault tolerant of system;
4. in Large Copacity MMC flexible direct-current transmission system, converter valve brachium pontis cascade number is large, the acquisition process structure of layer and section formula, ensure that the Microsecond grade decision-making of huge Information Monitoring and process is formed;
5. brachium pontis gathers control unit and is collected by the information of voltage of each brachium pontis segment control unit, and cannot form ordered sequence within the monocycle, binary cycle carries out acquisition and processing thought in turn, makes to gather the balance of voltage effect controlling overall brachium pontis more macroscopical reasonable.
Accompanying drawing explanation
Fig. 1 is modular multi-level converter topological structure figure;
Fig. 2 is that brachium pontis gathers the process collection calculating of control unit monocycle and processing procedure schematic diagram;
Fig. 3 is that brachium pontis gathers the information gathering of control unit binary cycle and process performs schematic diagram in turn.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
As Fig. 1, valve base control appliance structured flowchart as shown in Figure 1, it is processor DSP+ programmable device FPGA that brachium pontis wherein gathers control unit core, interface comprises the information communication with the protocol communication of circulation unit and multiple brachium pontis segment control unit, unify to gather to the valve information of multiple brachium pontis segmenting unit, adopt the balance of voltage strategy of overall brachium pontis, make overall brachium pontis submodule capacitor voltage balance movement.
As Fig. 2, brachium pontis gathers the process of control unit monocycle and gathers calculating and processing procedure, and step is as follows,
The t1-t2 time period:
● according to the modulation intelligence that electric current current control unit issues, adopt bridge arm voltage balanced algorithm strategy, form the modulation voltage information that each segment control unit of brachium pontis needs, send to each segment control unit;
The t2-t3 time period:
● wait for brachium pontis each Discrete control feedback valve information;
The t3-t4 time period
● gather the valve information receiving and each brachium pontis segmentation is sent respectively, ensure all to gather to receive
● each bridge arm voltage sequence process;
● arrange valve information, gather Control protection information, upwards send current control unit;
● each segment information is arranged and sends to current control unit;
● brachium pontis gathers the submodule information of voltage that control unit issues according to each segmentation of a upper cycle brachium pontis and sorts;
The above t1-t4 time period is one-period T, in one cycle above task is all completed, then the processing time at least needs to be less than 70% of the whole cycle, and 30% free time in whole like this cycle can meet the stability requirement of system high reliability and the emergency case processing requirements of high fault tolerance.Known by testing, the length of this time period depends on the processing time of brachium pontis segment control unit feeding-back valve information feed back, and segmentation is more, and the time is longer, even may occur the situation that cannot be disposed in the cycle.
As Fig. 3, the invention provides a kind of binary cycle information gathering and process the time sequence design method performed in turn, said method comprising the steps of:
Step 1: gather the sectioning valve information in the T1 cycle, brachium pontis segment control unit sent;
Step 2: within the T2 cycle, process and integrated ordered is carried out to gathered sectioning valve information.
Described sectioning valve information comprise all submodules of this segmentation voltage and, bypass count, operation information and error protection information.
The described T1 cycle is divided into t1 ~ t2 time period and t2 ~ t3 time period; The described T2 cycle is divided into t3 ~ t4 time period and t4 ~ t5 time period.
Described step 1 comprises the following steps:
Step 1-1:t1 ~ in the t2 time period, according to the modulation intelligence that circulation control unit issues, adopt bridge arm voltage balanced algorithm, form the modulation voltage information that each brachium pontis segment control unit needs, and send to each brachium pontis segment control unit;
Step 1-2:t2 ~ in the t3 time period, brachium pontis gathers control unit and gathers the sectioning valve information that each brachium pontis segment control unit send respectively, ensures that all collection is complete; Arrange sectioning valve information, gather and upload the sectioning valve information of whole brachium pontis and Control protection information to circulation control unit.
Brachium pontis gathers the mode that control unit is marked by poll and flag bit, gathers the sectioning valve information that each brachium pontis segment control unit send, and guarantees that receiving the information gathered does not repeat to receive, and does not accept and believe breath and does not miss.
Described step 2 comprises the following steps:
Step 2-1:t3 ~ in the t4 time period, according to the modulation intelligence that circulation control unit issues, adopt bridge arm voltage balanced algorithm, forms the modulation voltage information that each segment control unit of brachium pontis needs, sends to each brachium pontis segment control unit;
Step 2-2:t4 ~ in the t5 time period, sorted, and arrange sectioning valve information by the average voltage of bubbling method to each brachium pontis segment control unit, is gathered and uploads the sectioning valve information of whole brachium pontis and Control protection information to circulation control unit.
Described bridge arm voltage balanced algorithm carries out macro-control to the average voltage of each segmentation of whole brachium pontis, and each segmentation submodule average voltage is consistent as much as possible; Obtained the information of each brachium pontis segment control unit current period needs modulation by bridge arm voltage balanced algorithm, send to each brachium pontis segment control unit respectively.
Current control unit each cycle (100 microseconds or less) gathers control unit to brachium pontis and sends modulation intelligence and other relevant informations, in figure from the t1 moment, brachium pontis gathers the balance of voltage strategy realization that control unit then needs to carry out overall brachium pontis, and the work such as control information process, afterwards switching decision-making is sent to each brachium pontis segment control unit, then, the information feedback that the brachium pontis segment control unit receiving a upper cycle sends; Afterwards, in next cycle, i.e. the t3 moment in figure, brachium pontis gathers the balance of voltage strategy realization that control unit then needs to carry out overall brachium pontis, and the work such as control information process, afterwards the voltage collected being carried out sequence process, is the t3 ~ t4 time period in figure during this period of time; Like this, complete process respectively at binary cycle and gather and computing, thus coexist in one-period both avoiding, it is excessive that the processing time formed accounts for cycle proportion, maybe cannot finish the work, and reduces the correlated performance such as System Error-tolerance Property and reliability.
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit, although with reference to above-described embodiment to invention has been detailed description, those of ordinary skill in the field are to be understood that: still can modify to the specific embodiment of the present invention or equivalent replacement, and not departing from any amendment of spirit and scope of the invention or equivalent replacement, it all should be encompassed in the middle of right of the present invention.
Claims (5)
1. binary cycle information gathering with process the time sequence design method that performs in turn, it is characterized in that: said method comprising the steps of:
Step 1: gather the sectioning valve information in the T1 cycle, brachium pontis segment control unit sent;
Step 2: within the T2 cycle, process and integrated ordered is carried out to gathered sectioning valve information;
The described T1 cycle is divided into t1 ~ t2 time period and t2 ~ t3 time period; The described T2 cycle is divided into t3 ~ t4 time period and t4 ~ t5 time period;
Described step 1 comprises the following steps:
In step 1 ?1:t1 ~ t2 time period, according to the modulation intelligence that circulation control unit issues, adopt bridge arm voltage balanced algorithm, form the modulation voltage information that each brachium pontis segment control unit needs, and send to each brachium pontis segment control unit;
Step 1 ?in 2:t2 ~ t3 time period, brachium pontis gathers control unit and gathers the sectioning valve information that each brachium pontis segment control unit send respectively, ensures all to gather complete; Arrange sectioning valve information, gather and upload the sectioning valve information of whole brachium pontis and Control protection information to circulation control unit.
2. binary cycle information gathering according to claim 1 with process the time sequence design method that performs in turn, it is characterized in that: described sectioning valve information comprise all submodules of this segmentation voltage and, bypass count, operation information and error protection information.
3. binary cycle information gathering according to claim 1 with process the time sequence design method that performs in turn, it is characterized in that: brachium pontis gathers the mode that control unit is marked by poll and flag bit, gather the sectioning valve information that each brachium pontis segment control unit send, guarantee that the information gathered does not repeat to receive, do not accept and believe breath and do not miss.
4. binary cycle information gathering according to claim 1 with process the time sequence design method that performs in turn, it is characterized in that: described step 2 comprises the following steps:
Step 2 ?in 1:t3 ~ t4 time period, according to the modulation intelligence that circulation control unit issues, adopt bridge arm voltage balanced algorithm, form the modulation voltage information that each brachium pontis segment control unit needs, send to each brachium pontis segment control unit;
Step 2 ?in 2:t4 ~ t5 time period, sorted by the average voltage of bubbling method to each brachium pontis segment control unit, and arrange sectioning valve information, gather and upload the sectioning valve information of whole brachium pontis and Control protection information to circulation control unit.
5. the time sequence design method that the binary cycle information gathering according to claim 1 or 4 performs in turn with process, it is characterized in that: described bridge arm voltage balanced algorithm carries out macro-control to the average voltage of each segmentation of whole brachium pontis, each segmentation submodule average voltage is consistent as much as possible; Obtained the information of each brachium pontis segment control unit current period needs modulation by bridge arm voltage balanced algorithm, send to each brachium pontis segment control unit respectively.
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| CN101726640A (en) * | 2009-12-23 | 2010-06-09 | 中国电力科学研究院 | Control and protection system of converter valve operating test device |
| CN102170123A (en) * | 2011-03-16 | 2011-08-31 | 中国电力科学研究院 | Valve base control equipment sequential method of modularization multilevel flexible DC transmission system |
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| CN101726640A (en) * | 2009-12-23 | 2010-06-09 | 中国电力科学研究院 | Control and protection system of converter valve operating test device |
| CN102170123A (en) * | 2011-03-16 | 2011-08-31 | 中国电力科学研究院 | Valve base control equipment sequential method of modularization multilevel flexible DC transmission system |
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Address after: 102211 Beijing city Changping District Xiaotangshan town big East Village Road No. 270 (future technology city) Co-patentee after: CHINA-EPRI ELECTRIC POWER ENGINEERING Co.,Ltd. Patentee after: STATE GRID SMART GRID Research Institute Co-patentee after: DALIAN POWER SUPPLY COMPANY, STATE GRID LIAONING ELECTRIC POWER Co.,Ltd. Co-patentee after: State Grid Corporation of China Address before: 102211 Beijing city Changping District Xiaotangshan town big East Village Road No. 270 (future technology city) Co-patentee before: CHINA-EPRI ELECTRIC POWER ENGINEERING Co.,Ltd. Patentee before: STATE GRID SMART GRID Research Institute Co-patentee before: DALIAN POWER SUPPLY COMPANY OF LIAONING ELECTRIC POWER Co.,Ltd. Co-patentee before: State Grid Corporation of China |
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Effective date of registration: 20170531 Address after: 102211 Beijing city Changping District Xiaotangshan town big East Village Road No. 270 (future technology city) Co-patentee after: DALIAN POWER SUPPLY COMPANY, STATE GRID LIAONING ELECTRIC POWER Co.,Ltd. Patentee after: STATE GRID SMART GRID Research Institute Co-patentee after: State Grid Corporation of China Address before: 102211 Beijing city Changping District Xiaotangshan town big East Village Road No. 270 (future technology city) Co-patentee before: CHINA-EPRI ELECTRIC POWER ENGINEERING Co.,Ltd. Patentee before: STATE GRID SMART GRID Research Institute Co-patentee before: DALIAN POWER SUPPLY COMPANY, STATE GRID LIAONING ELECTRIC POWER Co.,Ltd. Co-patentee before: State Grid Corporation of China |
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| CI01 | Publication of corrected invention patent application |
Correction item: Patentee|Address|Patentee Correct: China-EPRI Electric Power Engineering Co., Ltd.|102200 Beijing city Changping District South Shao Zhen Nan Road No. 16|Dalian Power Supply Company, State Grid Liaoning Electric Power Co., Ltd.|State Grid Corporation of China False: State Grid Smart Grid Institute|102211 Beijing city Changping District Xiaotangshan town big East Village Road No. 270 (future technology city)|Dalian Power Supply Company, State Grid Liaoning Electric Power Co., Ltd.|State Grid Corporation of China Number: 24-02 Volume: 33 |