CN103036404A - 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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Abstract
本发明提供一种双周期信息采集与处理轮流执行的时序设计方法，包括以下步骤：采集T1周期内桥臂分段控制单元上送的分段阀信息；在T2周期内对所采集的分段阀信息进行处理和综合排序。本发明中分层分段式的采集处理结构解决了阀基控制设备对大规模子模块信息的采集和处理能力限制的问题，双周期轮流进行采集和处理思想，保证了庞大采集信息和处理的微秒级决策形成；采取双周期实现，采集周期和处理计算周期轮流运行方式，使桥臂汇总控制整体桥臂的电压平衡效果更为宏观合理。
The invention provides a timing design method for double-period information collection and processing in turn, comprising the following steps: collecting segment valve information sent by the bridge arm segment control unit in the T1 cycle; Valve information is processed and comprehensively sorted. The layered and segmented acquisition and processing structure in the present invention solves the problem that the valve base control equipment can limit the collection and processing capacity of large-scale sub-module information, and the idea of collecting and processing in two cycles in turn ensures the efficiency of huge collection of information and processing Microsecond-level decision-making; adopting double-cycle implementation, the acquisition cycle and processing calculation cycle operate in turn, making the voltage balance effect of the bridge arm summary control of the overall bridge arm more 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 of carrying out in turn.
Background technology
Current, be applied to more and more the fields such as electric power system, locomotive traction, Aero-Space based on the various Power Electronic Circuit of all-controlling power electronics device IGBT.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 the direct current transportation field, has directly promoted birth and the development of Technology of HVDC based Voltage Source Converter.Different from traditional high voltage dc transmission technology, the flexible DC power transmission converter has substituted the Thyristors in series converter valve with the high-voltage commutation valve that is made of the IGBT series connection, has formed the flexible direct current converter of voltage-source type.Flexible DC power transmission can be realized powering to remote middle-size and small-size isolated, weak load; Can carry out independent, accurately, meritorious/Reactive Power Control flexibly, improve economy and the stability of system load flow transmission; Direct voltage polarity is constant when trend is reversed, and conveniently consists of the multi-terminal HVDC transmission system; When linking system short-circuit, do not increase the capacity of short circuit of system, be conducive to limiting short-circuit current, stop the fault pervasion of system; Reactive power support and FREQUENCY CONTROL can be provided, be used for the regenerative resources such as wind energy turbine set and the distributed power generation special advantage that is incorporated into the power networks; Behind the electric network fault that links, can provide the black power supply that starts, the fast restoration capabilities behind the quickening electric network fault; The current conversion station floor space greatly reduces with respect to conventional DC.
The abundant performance advantage of Technology of HVDC based Voltage Source Converter has attracted numerous scientific research technical staff to put into relevant research and has put into practice in the work, its flexibly control performance also so that the control guard method of flexible direct current and control protective unit become the study hotspot of flexible direct current technology.In the control based on the flexible direct current of modularization multi-level converter topological structure, be very important link in the 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 of carrying out in turn, the acquisition process structure of layer and section formula has solved 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, has guaranteed that the Microsecond grade decision-making of huge Information Monitoring and processing forms; Take binary cycle to realize, collection period and process in turn operational mode of computing cycle, the balance of voltage effect that brachium pontis is gathered control whole brachium pontis is more macroscopical reasonable.
In order to realize the foregoing invention purpose, the present invention takes following technical scheme:
A kind of binary cycle information gathering is provided and processes the time sequence design method of carrying out in turn, said method comprising the steps of:
Step 1: gather the sectioning valve information of sending on the brachium pontis segmentation control unit in the T1 cycle;
Step 2: in the cycle sectioning valve information that gathers is processed with integrated ordered at T2.
Described sectioning valve information comprise these all submodules of 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 may further comprise the steps:
Step 1-1:t1～t2 is in the time period, and the modulation intelligence according to the circulation control unit issues adopts the bridge arm voltage balanced algorithm, forms the modulation voltage information that each brachium pontis segmentation control unit needs, and sends to each brachium pontis segmentation control unit;
Step 1-2:t2～t3 is in the time period, and brachium pontis gathers control unit and gathers respectively the sectioning valve information of sending on each brachium pontis segmentation control unit, guarantees all to gather complete; Arrangement sectioning valve information gathers and uploads the sectioning valve information of whole brachium pontis and control protection information to the circulation control unit.
Brachium pontis gathers control unit by the mode of poll and flag bit mark, gathers the sectioning valve information of sending on each brachium pontis segmentation control unit, guarantees to receive the information that has gathered and does not repeat to receive, and does not accept and believe breath and does not miss.
Described step 2 may further comprise the steps:
Step 2-1:t3～t4 is in the time period, and the modulation intelligence according to the circulation control unit issues adopts the bridge arm voltage balanced algorithm, forms the modulation voltage information that each segmentation control unit of brachium pontis needs, and sends to each brachium pontis segmentation control unit;
Step 2-2:t4～t5 sorted by the average voltage of bubbling method to each brachium pontis segmentation control unit in the time period, and arrangement sectioning valve information, gathered and uploaded the sectioning valve information of whole brachium pontis and control protection information to the circulation control unit.
Described bridge arm voltage balanced algorithm is that the average voltage to whole each segmentation of brachium pontis carries out macro-control, and each segmentation submodule average voltage is consistent as much as possible; Obtain the information that each brachium pontis segmentation control unit current period need to be modulated by the bridge arm voltage balanced algorithm, send to respectively each brachium pontis segmentation control unit.
Compared with prior art, beneficial effect of the present invention is:
1. the acquisition process structure of layer and section formula has solved 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, has guaranteed that the Microsecond grade decision-making of huge Information Monitoring and processing forms;
2. take binary cycle to realize, collection period and process in turn operational mode of computing cycle, the balance of voltage effect that brachium pontis is gathered control whole brachium pontis is more macroscopical reasonable;
3. ordered pair switching time, system sequence without any restriction, and have greatly strengthened reliability and the fault tolerant of system to balance of voltage effect and system protection etc. without any impact during binary cycle;
4. in large capacity MMC flexible DC power transmission system, converter valve brachium pontis cascade number is large, and the acquisition process structure of layer and section formula has guaranteed that the Microsecond grade decision-making of huge Information Monitoring and processing forms;
5. brachium pontis gathers control unit the information of voltage of each brachium pontis segmentation control unit is collected, and can't form ordered sequence within the monocycle, and binary cycle carries out acquisition and processing thought in turn, makes that to gather the balance of voltage effect of control whole brachium pontis more macroscopical reasonable.
Description of drawings
Fig. 1 is the modularization multi-level converter topology diagram;
Fig. 2 is that brachium pontis gathers the processing 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 schematic diagram is carried out in processing in turn.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
Such 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 the control unit core, interface comprises the information communication with protocol communication and a plurality of brachium pontis segmentation control units of circulation unit, the valve information of a plurality of brachium pontis segmenting units is unified to gather, adopt the balance of voltage strategy of whole brachium pontis, make whole brachium pontis submodule capacitance voltage balance movement.
Such as Fig. 2, brachium pontis gathers the control unit monocycle and processes collection 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 segmentation control unit of brachium pontis needs, send to each segmentation control unit;
The t2-t3 time period:
● wait for each segmentation control feedback valve information of brachium pontis;
The t3-t4 time period
● gather respectively the valve information of sending in each brachium pontis segmentation that receives, guarantee all to gather to receive
● each bridge arm voltage ordering is processed;
● arrangement valve information, gather the control protection information, upwards send current control unit;
● each segment information arrangement is sent to current control unit;
● brachium pontis gathers control unit and sorts according to the submodule information of voltage that upper each segmentation of cycle brachium pontis issues;
The above t1-t4 time period is one-period T, in one-period, above task is all finished, then the processing time needs to be less than 70% of the whole cycle at least, and 30% free time in whole like this cycle can be satisfied the stability requirement of system's high reliability and the emergency case processing requirements of high fault tolerance.By test as can be known, the length of this time period depends on the processing time of brachium pontis segmentation control unit feeding-back valve information feedback, and segmentation is more, and the time is longer, even the situation that can't be disposed in the cycle may occur.
Such as Fig. 3, the invention provides a kind of binary cycle information gathering and process the time sequence design method of carrying out in turn, said method comprising the steps of:
Step 1: gather the sectioning valve information of sending on the brachium pontis segmentation control unit in the T1 cycle;
Step 2: in the cycle sectioning valve information that gathers is processed with integrated ordered at T2.
Described sectioning valve information comprise these all submodules of 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 may further comprise the steps:
Step 1-1:t1～t2 is in the time period, and the modulation intelligence according to the circulation control unit issues adopts the bridge arm voltage balanced algorithm, forms the modulation voltage information that each brachium pontis segmentation control unit needs, and sends to each brachium pontis segmentation control unit;
Step 1-2:t2～t3 is in the time period, and brachium pontis gathers control unit and gathers respectively the sectioning valve information of sending on each brachium pontis segmentation control unit, guarantees all to gather complete; Arrangement sectioning valve information gathers and uploads the sectioning valve information of whole brachium pontis and control protection information to the circulation control unit.
Brachium pontis gathers control unit by the mode of poll and flag bit mark, gathers the sectioning valve information of sending on each brachium pontis segmentation control unit, guarantees to receive the information that has gathered and does not repeat to receive, and does not accept and believe breath and does not miss.
Described step 2 may further comprise the steps:
Step 2-1:t3～t4 is in the time period, and the modulation intelligence according to the circulation control unit issues adopts the bridge arm voltage balanced algorithm, forms the modulation voltage information that each segmentation control unit of brachium pontis needs, and sends to each brachium pontis segmentation control unit;
Step 2-2:t4～t5 sorted by the average voltage of bubbling method to each brachium pontis segmentation control unit in the time period, and arrangement sectioning valve information, gathered and uploaded the sectioning valve information of whole brachium pontis and control protection information to the circulation control unit.
Described bridge arm voltage balanced algorithm is that the average voltage to whole each segmentation of brachium pontis carries out macro-control, and each segmentation submodule average voltage is consistent as much as possible; Obtain the information that each brachium pontis segmentation control unit current period need to be modulated by the bridge arm voltage balanced algorithm, send to respectively each brachium pontis segmentation control unit.
Per cycle of current control unit (100 microseconds or still less) gathers control unit to brachium pontis and sends modulation intelligence and other relevant informations, among the figure from t1 constantly, the balance of voltage strategy that brachium pontis gathers control unit then to be needed to carry out whole brachium pontis is realized, reach the work such as control information processing, afterwards the switching decision-making is sent to each brachium pontis segmentation control unit, then, received the information feedback of the brachium pontis segmentation control unit transmission in a upper cycle; Afterwards, in next cycle, namely t3 is constantly among the figure, the balance of voltage strategy that brachium pontis gathers control unit then to be needed to carry out whole brachium pontis is realized, and the work such as control information processing, the processing of sorting of the voltage that will collect afterwards is the t3～t4 time period among the figure during this period of time; Like this, finished respectively process to gather and computing at binary cycle, thereby avoided both to coexist in the one-period, it is excessive that the formed processing time accounts for cycle proportion, maybe can't finish the work, and reduces the correlated performances such as System Error-tolerance Property and reliability.
Should be noted that at last: 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 the present invention is had been described in detail, those of ordinary skill in the field are to be understood that: still can make amendment or be equal to replacement the specific embodiment of the present invention, and do not break away from any modification of spirit and scope of the invention or be equal to replacement, it all should be encompassed in the middle of the claim scope of the present invention.
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| CN116526638A (en) * | 2023-07-04 | 2023-08-01 | 宁德时代新能源科技股份有限公司 | Modulation method and modulation device of cascade energy storage 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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Cited By (2)
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| CN116526638A (en) * | 2023-07-04 | 2023-08-01 | 宁德时代新能源科技股份有限公司 | Modulation method and modulation device of cascade energy storage system |
| CN116526638B (en) * | 2023-07-04 | 2023-11-21 | 宁德时代新能源科技股份有限公司 | Modulation method and modulation device of cascade energy storage 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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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 |