CN103606938A - Thyristor rectifying device control system for aluminum electrolysis industry under isolated power system operation - Google Patents
Thyristor rectifying device control system for aluminum electrolysis industry under isolated power system operation Download PDFInfo
- Publication number
- CN103606938A CN103606938A CN201310608929.8A CN201310608929A CN103606938A CN 103606938 A CN103606938 A CN 103606938A CN 201310608929 A CN201310608929 A CN 201310608929A CN 103606938 A CN103606938 A CN 103606938A
- Authority
- CN
- China
- Prior art keywords
- frequency
- load
- plc control
- power
- rectifying device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Control Of Eletrric Generators (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
Disclosed is a thyristor rectifying device control system for the aluminum electrolysis industry under isolated power system operation. The thyristor rectifying device control system comprises a rectifying device n1, a rectifying device n2, PLC control devices of all sets and a general regulation PLC control device, wherein the rectifying device n1 is used for ensuring the safety of the generator sets of a self-generation power plant, the rectifying device n2 is used for reducing loads to ensure the stability of power grid frequency, the general regulation PLC control device is connected with the PLC control devices of all the sets in a ControlNet dual-network redundancy mode, and the PLC control devices of all the sets are connected with a background monitoring room in an Ethernet communication mode. When the loads need reducing because of frequency fall caused by abnormalities of the generator sets of the self-generation power plant, the rectifying device n1 carries out detection quickly and timely and makes a relevant judgment accurately, and the function of tracking electrolysis series current automatically is immediately removed from the general regulation PLC control device to convert constant current control into constant power control. Real-time regulation of the loads can be achieved through reliable and fast network communications and a broadband constant-current system, and accordingly the purposes of stabilizing the frequency of the generator sets and guaranteeing the stable operation of the whole power supply system are achieved.
Description
Technical field
The present invention relates to aluminium electroloysis industry thyristor rectifier device control system used under a kind of lonely network operation, mainly refer to the method that under lonely network operation, the method for the quick accurate adjustment unit of UFLS output load and the dual network redundancy communication of the whole control system of lonely network operation realize.
Background technology
Aluminum electrolysis industry is high energy consumption industry, in order to reduce production costs, many aluminium electrolysis enterprises have proposed use power plant for self-supply power supply (lonely net power supply) scheme, can reduce production costs to greatest extent like this and can effectively save a large amount of electric energy, but because of the fluctuation of electric load, impact and make the generating set can not stable operation, make its security performance be difficult to be protected.To meet Production requirement and take into account again power plant for self-supply's generating set safety, seek so a kind of brand-new rectification control method under aluminium electrolysis commutator device under lonely network operation that is applied to, can not only effectively reach above effect, can also save more Coal Energy Source for China.
Summary of the invention
Its object of the present invention is just to provide aluminium electroloysis industry thyristor rectifier device used under a kind of lonely network operation
Control system, native system, by the steady flow system of network communication fast reliably and wideband, can be realized real-time regulating load size, thereby reach generating set stabilized frequency, protects the order of whole electric power system stable operation.
The technical scheme that realizes above-mentioned purpose and take, comprise the rectifying installation n1 that guarantees power plant for self-supply's generating set safety, load down is protected the stable rectifying installation n2 of mains frequency, and each machine set PLC control device and total PLC control device of adjusting, between described total tune PLC control device and each machine set PLC control device, adopt the mode of ControlNet double-network redundant, each machine set PLC control device adopts ethernet communication mode to be connected with background monitoring chamber; When power plant for self-supply's generating set causes frequency decline to need load shedding extremely, rectifying installation n1 detects and accurately makes rapidly corresponding judgement in time, total PLC control device of adjusting is removed the function from motion tracking electrolytic series electric current immediately, by current stabilization control, being converted to permanent power controls, frequency stabilization load reduction control system needs stable output load to adjust quickly and accurately the load that power plant need to reduce according to power plant for self-supply, guarantee permanent power, make mains frequency fast and stable.
Compared with prior art the present invention has the following advantages.
The present invention, by the steady flow system of network communication fast reliably and wideband, realizes real-time regulating load size, thereby reaches generating set stabilized frequency, protects whole electric power system stable operation.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described.
Fig. 1 is this device embodiment Large aluminum electrolytic plant electric hookup;
Fig. 2 is this device low frequency Control of decreasing load flow chart;
Fig. 3 is this device low frequency off-load external lock pulse mode seizure oscillogram;
Fig. 4 is this apparatus system network communication structure chart.
Embodiment
Native system comprises the rectifying installation n1 that guarantees power plant for self-supply's generating set safety, load down is protected the stable rectifying installation n2 of mains frequency, and each machine set PLC control device and total PLC control device of adjusting, as shown in Figure 1,3, between described total tune PLC control device and each machine set PLC control device, adopt the mode of ControlNet double-network redundant, each machine set PLC control device adopts ethernet communication mode to be connected with background monitoring chamber; When power plant for self-supply's generating set causes frequency decline to need load shedding extremely, rectifying installation n1 detects and accurately makes rapidly corresponding judgement in time, total PLC control device of adjusting is removed the function from motion tracking electrolytic series electric current immediately, by current stabilization control, being converted to permanent power controls, frequency stabilization load reduction control system needs stable output load to adjust quickly and accurately the load that power plant need to reduce according to power plant for self-supply, guarantee permanent power, make mains frequency fast and stable.
Load needs being reduced according to the speed of system power vacancy size and frequency decline is divided into several intervals, when actual frequency is low to moderate the first interval, according to the ratio of setting, reduce each unit electric current and carry out first round excision load, load power and frequency are proportional, if power disappearance is larger, frequency continues to decline while entering between Second Region, carries out second and takes turns excision load; By that analogy, until the stable end of mains frequency.
The present invention is mainly for the aluminium electricity industry that is applied to lonely net frequency stabilization, when power plant for self-supply is because operation electric set electric supply scarce capacity is when (the power-supply system frequency of occurrences is abnormal), the total capacity that is less than load as generator total capacity acquires a certain degree, generator can not keep rated speed, in factory, the frequency of electrical network will reduce so, when serious, even can cause generator to be tending towards stall, i.e. system cycle collapse.At this moment rectification control system needs to detect and accurately make in time rapidly corresponding judgement, when the decline of power generator class frequency being detected, total PLC that adjusts removes the function from motion tracking electrolytic series electric current immediately, by current stabilization control, being converted to permanent power controls, frequency stabilization load reduction control system needs stable output load according to power plant for self-supply, adjusts quickly and accurately the load that power plant need to reduce.By adjusting the quantity of Rectification Power Factor operation, or trigger by adjusting thyristor the operating current that reduces unit constantly, guarantee permanent power, make mains frequency fast and stable.So, guarantee power generator group safety, can meet again the stable operation of electrolysis tank.
Due to special like this powered operation structure, for UFLS this to cross range request be quite harsh, current stabilization control system is from receiving frequency anomaly, then to making off-load until whole mains frequency is stable, this crosses range request must be accurate and reliable rapidly.Whole time requirement will be controlled at 100MS and complete with interior, just because of this, and must be accurately and reliably for the communication between total tune PLC and each machine set PLC.The present invention is in total mode that adopts ControlNet double-network redundant between PLC and each machine set PLC of adjusting, each PLC and background monitoring chamber adopt ethernet communication mode, so, guaranteed that control net swap data between current stabilization control system is not subject to the interference of background monitoring data, has also guaranteed reliability and the rapidity of each network simultaneously.
Accompanying drawing 1 is this device embodiment Large aluminum electrolytic plant electric hookup, and electrolytic aluminium factory power supply forms ，Er aluminium manufacturer Ye Wei power plant for self-supply basic load source by power plant for self-supply and local power network.Normal power supply Shi You power plant for self-supply is by the female power supply of I, local power network is in the female hot standby state of II, when power plant for self-supply breaks down, by power plant, to total PLC, send load down instruction, now 4-9# Rectification Power Factor reduces on request load and meets power plant for self-supply's demand, and 1-3# Rectification Power Factor will maintain the constant operation that maintains electrolysis tank of current output and as the basic load of power plant for self-supply.As power plant for self-supply's fault continues, can by female continuation of II, to 1-3# unit, be powered by local power network, keep the basic operation of electrolysis tank.
Accompanying drawing 2 is aluminium electrolysis commutator device low frequency Control of decreasing load flow chart, comprise UFLS program major control flow process under lonely network operation, when total PLC has detected after UFLS signal, exit at once normal current stabilization control logic, lock this power plant for self-supply and the current electric current of local power network simultaneously time, as requested, the load of local power network falls to the rated value of defined.Judge that whether the frequency after off-load is normal, if normal, return to normal current stabilization control program, if also undesired, again carry out above operation.
Accompanying drawing 3 is that low frequency off-load external lock pulse mode catches oscillogram, is experimental waveform data, and total PLC receives after UFLS signal, orders each unit to start to lock pulse, until load dropped to for zero institute's time spent completely.
Accompanying drawing 4 is aluminium electrolysis commutator grid communication structure figure under lonely network operation, by two communication networks, formed, total mode that adopts ControlNet double-network redundant between PLC and each machine set PLC of adjusting, communication speed can reach 7ms, each PLC and background monitoring chamber adopt fiber optic Ethernet communication modes, so, guaranteed that control net swap data between current stabilization control system is not subject to the interference of background monitoring data, has also guaranteed reliability and the rapidity of each network simultaneously.
Claims (2)
1. aluminium electroloysis industry thyristor rectifier device control system used under a lonely network operation, comprise the rectifying installation n1 that guarantees power plant for self-supply's generating set safety, load down is protected the stable rectifying installation n2 of mains frequency, and each machine set PLC control device and total PLC control device of adjusting, it is characterized in that, between described total tune PLC control device and each machine set PLC control device, adopt the mode of ControlNet double-network redundant, each machine set PLC control device adopts ethernet communication mode to be connected with background monitoring chamber; When power plant for self-supply's generating set causes frequency decline to need load shedding extremely, rectifying installation n1 detects and accurately makes rapidly corresponding judgement in time, total PLC control device of adjusting is removed the function from motion tracking electrolytic series electric current immediately, by current stabilization control, being converted to permanent power controls, frequency stabilization load reduction control system needs stable output load to adjust quickly and accurately the load that power plant need to reduce according to power plant for self-supply, guarantee permanent power, make mains frequency fast and stable.
2. aluminium electroloysis industry thyristor rectifier device control system used under a kind of lonely network operation according to claim 1, it is characterized in that, load needs being reduced according to the speed of system power vacancy size and frequency decline is divided into several intervals, when actual frequency is low to moderate the first interval, according to the ratio of setting, reduce each unit electric current and carry out first round excision load, load power and frequency are proportional, if power disappearance is larger, frequency continues to decline while entering between Second Region, carries out second and takes turns excision load; By that analogy, until the stable end of mains frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310608929.8A CN103606938B (en) | 2013-11-26 | 2013-11-26 | Aluminium electroloysis industry thyristor rectifier device control system used under a kind of isolated power grid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310608929.8A CN103606938B (en) | 2013-11-26 | 2013-11-26 | Aluminium electroloysis industry thyristor rectifier device control system used under a kind of isolated power grid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103606938A true CN103606938A (en) | 2014-02-26 |
| CN103606938B CN103606938B (en) | 2015-11-25 |
Family
ID=50125144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310608929.8A Active CN103606938B (en) | 2013-11-26 | 2013-11-26 | Aluminium electroloysis industry thyristor rectifier device control system used under a kind of isolated power grid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103606938B (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104805470A (en) * | 2015-04-29 | 2015-07-29 | 酒泉钢铁(集团)有限责任公司 | Method for verifying corresponding relationship between direct current and alternating-current power of 500 kA electrolytic aluminum |
| CN106208087A (en) * | 2016-08-02 | 2016-12-07 | 南京南瑞继保电气有限公司 | A kind of industrial undertaking self power generation method for controlling power balance |
| CN107740142A (en) * | 2017-10-18 | 2018-02-27 | 九江赛晶科技股份有限公司 | The lower thyristor rectifier device redundancy handover control system of compensation operation in a kind of aluminium cell |
| CN108808688A (en) * | 2018-07-04 | 2018-11-13 | 云南电网有限责任公司 | A kind of steady control cutting load method based on electrolytic aluminium control characteristic |
| CN109687579A (en) * | 2018-12-13 | 2019-04-26 | 九江赛晶科技股份有限公司 | A kind of fairing isolated network recovery electrolytic aluminium load control system |
| CN109735874A (en) * | 2019-03-21 | 2019-05-10 | 钱乙卫 | A kind of optimization regulating method and control system of electrolytic aluminium load |
| CN110176783A (en) * | 2019-05-29 | 2019-08-27 | 湖南力宇新能源科技有限公司 | The power regulating method and device of generating set |
| CN110829445A (en) * | 2019-10-18 | 2020-02-21 | 酒泉钢铁(集团)有限责任公司 | Load shedding control method for power supply system of electrolytic aluminum production line |
| CN112564515A (en) * | 2020-12-22 | 2021-03-26 | 哈尔滨工业大学 | 560kA aluminum electrolysis power supply system based on switching control and control method thereof |
| CN112636365A (en) * | 2020-11-11 | 2021-04-09 | 九江赛晶科技股份有限公司 | Method for controlling power constancy of high-power rectifying device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101119022A (en) * | 2006-08-02 | 2008-02-06 | 贵阳铝镁设计研究院 | Rectifier transformer group transverse bracing differential current protection method and apparatus |
| CN103114308A (en) * | 2011-11-16 | 2013-05-22 | 沈阳铝镁设计研究院有限公司 | Aluminum electrolysis tank compensation bus power supply rectification set |
| CN103166241A (en) * | 2011-12-14 | 2013-06-19 | 深圳市康必达中创科技有限公司 | Isolated power grid stability control system |
-
2013
- 2013-11-26 CN CN201310608929.8A patent/CN103606938B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101119022A (en) * | 2006-08-02 | 2008-02-06 | 贵阳铝镁设计研究院 | Rectifier transformer group transverse bracing differential current protection method and apparatus |
| CN103114308A (en) * | 2011-11-16 | 2013-05-22 | 沈阳铝镁设计研究院有限公司 | Aluminum electrolysis tank compensation bus power supply rectification set |
| CN103166241A (en) * | 2011-12-14 | 2013-06-19 | 深圳市康必达中创科技有限公司 | Isolated power grid stability control system |
Non-Patent Citations (2)
| Title |
|---|
| 李纲: "大型铝电解整流机组方案确定", 《轻金属》, no. 8, 31 August 2000 (2000-08-31), pages 32 - 35 * |
| 郑良华 等: "孤网运行实践", 《吉林电力》, vol. 36, no. 2, 30 April 2008 (2008-04-30) * |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104805470B (en) * | 2015-04-29 | 2017-05-31 | 酒泉钢铁(集团)有限责任公司 | A kind of verification method of 500kA electrolytic aluminiums DC current and AC power corresponding relation |
| CN104805470A (en) * | 2015-04-29 | 2015-07-29 | 酒泉钢铁(集团)有限责任公司 | Method for verifying corresponding relationship between direct current and alternating-current power of 500 kA electrolytic aluminum |
| CN106208087A (en) * | 2016-08-02 | 2016-12-07 | 南京南瑞继保电气有限公司 | A kind of industrial undertaking self power generation method for controlling power balance |
| CN106208087B (en) * | 2016-08-02 | 2019-05-21 | 南京南瑞继保电气有限公司 | A kind of industrial enterprise's self power generation method for controlling power balance |
| CN107740142A (en) * | 2017-10-18 | 2018-02-27 | 九江赛晶科技股份有限公司 | The lower thyristor rectifier device redundancy handover control system of compensation operation in a kind of aluminium cell |
| CN108808688B (en) * | 2018-07-04 | 2021-07-02 | 云南电网有限责任公司 | Stable control load shedding method based on electrolytic aluminum control characteristics |
| CN108808688A (en) * | 2018-07-04 | 2018-11-13 | 云南电网有限责任公司 | A kind of steady control cutting load method based on electrolytic aluminium control characteristic |
| CN109687579A (en) * | 2018-12-13 | 2019-04-26 | 九江赛晶科技股份有限公司 | A kind of fairing isolated network recovery electrolytic aluminium load control system |
| CN109735874A (en) * | 2019-03-21 | 2019-05-10 | 钱乙卫 | A kind of optimization regulating method and control system of electrolytic aluminium load |
| CN110176783A (en) * | 2019-05-29 | 2019-08-27 | 湖南力宇新能源科技有限公司 | The power regulating method and device of generating set |
| CN110829445A (en) * | 2019-10-18 | 2020-02-21 | 酒泉钢铁(集团)有限责任公司 | Load shedding control method for power supply system of electrolytic aluminum production line |
| CN110829445B (en) * | 2019-10-18 | 2023-03-24 | 酒泉钢铁(集团)有限责任公司 | Load shedding control method for power supply system of electrolytic aluminum production line |
| CN112636365A (en) * | 2020-11-11 | 2021-04-09 | 九江赛晶科技股份有限公司 | Method for controlling power constancy of high-power rectifying device |
| CN112564515A (en) * | 2020-12-22 | 2021-03-26 | 哈尔滨工业大学 | 560kA aluminum electrolysis power supply system based on switching control and control method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103606938B (en) | 2015-11-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103606938B (en) | Aluminium electroloysis industry thyristor rectifier device control system used under a kind of isolated power grid | |
| EP2859638B1 (en) | Wind-power-plant control upon low-voltage grid faults | |
| CA2934348C (en) | Method and regulation and/or control device for operating a wind turbine and/or a wind farm, and wind turbine and wind farm | |
| EP3631930B1 (en) | Improvements relating to voltage control in renewable power plants | |
| CN103986403A (en) | Variable-frequency speed control system and method | |
| CN104300583B (en) | A kind of meter and the microgrid control method for frequency of equipment governing response characteristic | |
| CN103414200B (en) | Method for monitoring and controlling automatic reactive power compensation system of high-low voltage power distribution network | |
| EP3729589B1 (en) | Adaptive active power control in renewable energy power plants | |
| JP2015211480A (en) | Voltage rise suppression and control method of power generation system | |
| CN104329225A (en) | Wind power generator set power control method | |
| CN102868181A (en) | Anti-backflow method and device for grid-connected power generation system | |
| CN103401254A (en) | Monitoring device of automatic reactive compensation system for high-low voltage power distribution network | |
| CN103731011B (en) | A kind of highly reliable constant current for highway remote power-feeding turns constant-voltage equipment | |
| CN109004673A (en) | A kind of subway Way of Regenerating Energy Feedback device DC voltage detection and control method | |
| CN102624019B (en) | Single-phase 660V-3.3KV long-distance distributed direct power supply system | |
| CN203911596U (en) | High voltage cable external wireless power supply acquisition device | |
| CN103510124A (en) | Micro-grid control system and device automatically adjusting aluminum electrolysis direct current load | |
| CN106208087B (en) | A kind of industrial enterprise's self power generation method for controlling power balance | |
| CN107681687B (en) | Energy storage-based bus overvoltage suppression control method and system for distributed system | |
| CN104578146A (en) | Control method, device and system for island operation of wind generating set | |
| CN203800601U (en) | PGL series low-voltage reactive power automatic compensation cabinet | |
| CN204302826U (en) | A kind of stelliform connection topology configuration temperature control protection system for dynamic passive compensation and filter | |
| CN104319788B (en) | A kind of power plant powerless control system and control method | |
| CN103595073B (en) | A kind of Wind turbines and Wind turbines overcome the method for grid fluctuations affect | |
| CN108054777B (en) | Wind power hydrogen production control strategy generation method and device, storage medium and computing equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 332000, Jiujiang Development Zone, Jiangxi West Port, Hong Kong Road, the middle Patentee after: JIUJIANG SAIJING TECHNOLOGY CO., LTD. Address before: 332000, Jiujiang Development Zone, Jiangxi West Port, Hong Kong Road, the middle Patentee before: Jiujiang Jiuzheng Rectifier Co., Ltd. |