CN102097856B - Spare power automatic switching programmable logic control method for plant supply of power station - Google Patents
Spare power automatic switching programmable logic control method for plant supply of power station Download PDFInfo
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Abstract
The invention discloses a spare power automatic switching programmable logic control method for a plant supply of a power station based on a fieldbus communication technology. In the method, an electric spacing layer fieldbus network 1 for the power station is adopted; and a main control unit acquires data of a comprehensive protection device and a measurement and control device on a spacing layer bus, so the spare power automatic switching function of a station-service power supply can be realized in the main control unit. By the method, the limitation of the conventional spare power automatic switching device is broken through, and the conventional spare power automatic switching device is saved. The whole logical configuration is more intuitional by using the parallel node communication function; as the data global share and the data quality take participation in the logic, the whole logic configuration is more flexible and convenient; therefore, the flexibility and the usability of the system are enhanced. The method has obvious advantages in the aspects of flexibility of realizing the station-service power supply backup switchover logic and saving of equipment investment.
Description
Technical field
The invention belongs to technical field of power systems, be specifically related to the implementation method of Auxiliary System in Power Plant source prepared auto restart logic.
Background technology
Auxiliary System in Power Plant source prepared auto restart function occupies very important status in thermal power plant service power system.In " preventing 25 important requirements of electrical production major accident ", explicitly point out and to prevent the power cut of whole factory accident in order to avoid cause that unit is out of control, the serious consequence of device damage.Prevent that the power cut of whole factory accident from occuring, guarantee that service power prepared auto restart logic function input is even more important.Simultaneously, different according to the mode of connection of different power plant, the difference of each power operating mode, the standby logic of throwing generally needs a kind of mode based on flexible configurations to realize.
In the tradition control of Auxiliary System in Power Plant source, all be to adopt special backup auto-activating device, the I/O data of backup auto-activating device all are based on hardwire collection and finish, and its project cost is high, and engineering construction intensity is large.The used data of prepared auto restart have all collected in the supervisory control system of Auxiliary System in Power Plant source in each main control unit, therefore possess the condition that realizes service power prepared auto restart function in main control unit.
Day by day maturation along with field bus technique has been applied to the GPA control system gradually.Programmable logic controller (PLC) based on mechanicss of communication such as fieldbus, Industrial Ethernet can be saved other hardware devices such as a large amount of hardwires, transmitter, reduces whole project cost.Fieldbus has excellent performance at transmission rate, time determinability, fault self-diagnosis on the data quality simultaneously.
Summary of the invention
For solving in the prior art, there are the problems such as cost is high, engineering construction intensity is large, Logical Configuration underaction in special backup auto-activating device, the invention provides a kind of method that realizes Auxiliary System in Power Plant source prepared auto restart FPGA (Field Programmable Gate Array) based on the field bus communication technology, the method is to realize Auxiliary System in Power Plant source prepared auto restart FPGA (Field Programmable Gate Array) in main control unit, rather than adopts special backup auto-activating device.
The present invention is specifically by the following technical solutions:
A kind of Auxiliary System in Power Plant power supply prepared auto restart programmable logic control method, the method realizes the prepared auto restart logic control of Auxiliary System in Power Plant source in the power plant main control unit, it is characterized in that, said method comprising the steps of:
(1) data acquisition of layered distribution type: the Auxiliary System in Power Plant management system adopts the layered distribution type system configuration, the bay device of two sections inlet wires of power plant accesses main control unit in this section by fieldbus, deciliter state, busbar voltage, the electric current of deciliter state of this section service entrance switch that described bay device will gather by fieldbus networks and each phase current, voltage signal and bus connection switch are uploaded to main control unit, and described bay device also receives the switch breaker tripping and closing instruction that main control unit issues;
(2) data interaction and processing: adopt the high speed Dual-Ethernet to communicate between the main control unit of power plant's each section inlet wire, the real-time, interactive data, so that the main control unit of every section inlet wire can collect standby needed each other twolink switch deciliter state, each phase current of circuit and voltage, bus connection switch deciliter state for subsequent use, busbar voltage, the electric current thrown of station service power supply in real time, reliably;
(3) the standby logic of throwing is judged: the each other switch deciliter state of two sections inlet wires for subsequent use that the main control unit basis of each inlet wire is obtained, and each phase current of circuit and voltage, bus connection switch deciliter state, bus current, voltage are judged according to the standby logic of throwing of setting;
(4) the standby throwing of station service power supply drops into: described main control unit process is for after throwing the logic judgement, if meet the standby logic of throwing, then assign deciliter instruction of line switching or bus connection switch, corresponding interval layer equipment is according to deciliter instruction, disconnect or close corresponding inlet wire section switch or bus connection switch, realize that standby throwing of twolink switch for subsequent use each other and bus connection switch dropped into.
Described bay device comprises comprehensive protector, measure and control device; Bay device also further gathers block signal and the accident alarm signal of each section service entrance switch.
Has redundant synchrodata function between each section inlet wire main control unit, every section inlet wire adopts two main control units redundant each other, realization information increment is synchronous, after the bay device that accesses under one of them main control unit breaks down, another metrical information of this bay device under the redundant main control unit each other of automatic synchronization.
The employing of the method, it is high to have solved traditional spare power project cost, and engineering construction intensity is large, the problem of Logical Configuration underaction.When saving project cost, the method can better adapt to the on-the-spot different mode of connection and different standby throwing modes, has greater flexibility.The method can realize complete logout and record ripple simultaneously, has realized standby throwing logic analysis transparence.
Description of drawings
Fig. 1 realizes the standby logic step schematic diagram of throwing in Auxiliary System in Power Plant source;
Fig. 2 is main control unit and bay device communication schematic diagram;
Fig. 3 is the standby primary connection figure that throws of a typical bus connection switch;
Fig. 4 is the standby logic diagram of throwing of bus connection switch;
Fig. 5 is the standby logic function block figure that throws of bus connection switch.
Embodiment
Below in conjunction with Figure of description and by specific embodiment technical scheme of the present invention is described in further detail.The buzzword of using among the application:
Main control unit: refer to be in power plant electrical system interlayer communication control appliance, integrate monitoring substation, terminal unit management machine and the various functions such as communication processor, process controller
Parallel nodes communication: refer to be in high speed interaction data between the node of same system level
Fig. 1 is for realizing the standby logic step schematic diagram of throwing in Auxiliary System in Power Plant source.The method realizes the prepared auto restart logic control of Auxiliary System in Power Plant source in the power plant main control unit, said method comprising the steps of:
Main control unit equipment has a plurality of communication acquisition ports, supports multiple kinds, guarantees the real-time of image data.Each PORT COM of main control unit links to each other with bay device by fieldbus in physical layer, and application layer uses corresponding communications protocol to carry out the transmitting-receiving of data according to the difference of physical layer fieldbus.Concrete transceiving data comprises: receive the voltage of bay device, electric current, on off state, accident alarm status etc.; Main control unit issues switch deciliter instruction after judging through standby throwing logic.Bay device directly gathers voltage, the electric current of each circuit and bus by measurement module, switch deciliter state, the accident alarm status, circuit bus connection switch state, the measuring point information such as electric current and voltage state, receive the switch deciliter instruction that main control unit issues, module is directly closed or open-circuit line or bus connection switch by leaving.
The ability that has mutual high-speed communication between each main control unit adopts the high speed Dual-Ethernet to communicate, can the real-time, interactive data between each main control unit, thus main control unit can in real time, reliably obtain standby needed all data of throwing.In the station service management system, every circuit is with many interstations interlayer equipment under this circuit of main control unit equipment access, wherein the bar coupler of two circuits access main control unit of a circuit wherein.Such as work 1A section main control unit, generally access 1A electric power incoming line and mother, the subsidiary engine equipment such as blower fan under 1A bus PT measure and control device and this section; Work 1B section main control unit, access 1B electric power incoming line, the subsidiary engine equipment such as blower fan under 1B bus PT measure and control device and this section.Guarantee that power plant's each section equipment normally stablizes charging operation, guarantee simultaneously economic optimum, need the standby function of throwing of two circuits for subsequent use each other and mother.This just needs to carry out real-time data interaction between the main control unit, thereby main control unit can obtain standby all the required data of throwing in real time, reliably.Interconnected by Ethernet between the parallel nodes of main control unit, the mode by communication realizes exchanges data, ensures integrality and the real-time of the measuring point information synchronization between different main control units.The scope of exchanges data can dispose selection, adopts reliability and the real-time of the internal communication agreement assurance communication of high efficient and reliable.Main control unit is according to the each other switch deciliter state of two circuits for subsequent use that collects, electric current and voltage, deciliter state of bus connection switch, the information such as busbar voltage electric current, according to the concrete mode of connection in scene, carry out the standby logic of throwing and judge, realize that standby throwing of service power dropped into.One typical standby throws logic as described in the accompanying drawing 4.The main control unit support is complete logic development function flexibly, support the IEC61131-3 standard, for the standby characteristics of throwing logic in each Auxiliary System in Power Plant source, the distinctive standby logic function block storehouse of throwing has been developed in encapsulation comprehensively, according to the concrete mode of connection in scene, the flexibly standby throwing of configuration logic.
Main control unit sends instructions to corresponding bay device under the mode with communication according to the standby result who throws the logic judgement.Bay device connects or disconnects a corresponding switch according to switch deciliter instruction, realizes standby correct input of throwing, assurance system each section circuit normal power supply, stable operation.
Fig. 2 has illustrated to realize data communication by fieldbus between main control unit and the bay device.Adopt high speed Dual-Ethernet, TCP/IP communications protocol between the main control unit.Adopt the Profibus-DP field bus communication between main control unit and the wall.Bay device directly gathers each line switching state, accident alarm status, the measuring amount such as electric current and voltage.
Fig. 3 has illustrated the primary connection figure of a typical bus connection switch, 1DL, the mutual stand-by heat of 2DL circuit in this winding diagram, and when normally moving, I, mother II all have pressure, and DL1, DL2 are in co-bit, and DL3 is in a minute position.When DL1 or the tripping of DL2 fault, must close DL3., two buses of assurance I, II are all powered.
Figure 4 shows that the standby logic diagram of throwing of bus connection switch.This logic is realized by main control unit.The main standby logical action of throwing is as follows:
1), the female decompression of I, circuit I is without stream, mother II has pressure, time-delay T1 tripping DL1, T3 closes 3DL and guarantees normal power supply when detecting mother II calendering being arranged.
2), the female decompression of II, circuit II is without stream, mother I has pressure, time-delay T2 tripping DL2, T3 closes 3DL and guarantees normal power supply when detecting mother I calendering being arranged.
3), when 1DL or 2DL jump, time-delay T3 closes 3DL and guarantees normal power supply.
Fig. 5 is a concrete standby realization of throwing logic, and wherein automatically performing logical block is to be built by a lot of electric function pieces, has realized the logic that automatically performs of standby throwing.The final condition of carrying out of action logic is: satisfy the everything condition, and do not satisfy any barring condition, and finished the charging to charger, and the time that above state keeps is carried out time-delay greater than logic.The initial conditions of Fig. 5 leftmost side, as: the bus with no pressure, switch divides the position, and circuit with no pressure etc. is the bay device measuring point information that main control unit collects, and through logical AND, logic OR, time-delay after a series of logical process such as counter, is sent action command.Automatically perform logical block by the specific standby logic function block of throwing that the main control unit encapsulation forms, realize standby the automatically performing of logic of throwing.
Claims (3)
1. Auxiliary System in Power Plant power supply prepared auto restart programmable logic control method, the method realizes the prepared auto restart logic control of Auxiliary System in Power Plant source in the power plant main control unit, it is characterized in that, said method comprising the steps of:
(1) data acquisition of layered distribution type: the Auxiliary System in Power Plant management system adopts the layered distribution type system configuration, the bay device of two sections inlet wires of power plant accesses main control unit in this section by fieldbus, deciliter state, busbar voltage, the electric current of deciliter state of this section service entrance switch that described bay device will gather by fieldbus networks and each phase current, voltage signal and bus connection switch are uploaded to main control unit, and described bay device also receives the switch breaker tripping and closing instruction that main control unit issues;
(2) data interaction and processing: adopt the high speed Dual-Ethernet to communicate between the main control unit of power plant's each section inlet wire, the real-time, interactive data, so that the main control unit of every section inlet wire can collect standby needed each other twolink switch deciliter state, each phase current of circuit and voltage, bus connection switch deciliter state for subsequent use, busbar voltage, the electric current thrown of station service power supply in real time, reliably;
(3) the standby logic of throwing is judged: the each other switch deciliter state of two sections inlet wires for subsequent use that the main control unit basis of each inlet wire is obtained, and each phase current of circuit and voltage, bus connection switch deciliter state, bus current, voltage are judged according to the standby logic of throwing of setting;
(4) the standby throwing of station service power supply drops into: described main control unit process is for after throwing the logic judgement, if meet the standby logic of throwing, then assign deciliter instruction of line switching or bus connection switch, corresponding interval layer equipment is according to deciliter instruction, disconnect or close corresponding inlet wire section switch or bus connection switch, realize that standby throwing of twolink switch for subsequent use each other and bus connection switch dropped into.
2. the method for claim 1, it is characterized in that: described bay device comprises comprehensive protector, measure and control device; Bay device also further gathers block signal and the accident alarm signal of each section service entrance switch.
3. the method for claim 1, it is characterized in that: have redundant synchrodata function between each section inlet wire main control unit, every section inlet wire adopts two main control units redundant each other, realization information increment is synchronous, after the bay device that accesses under one of them main control unit breaks down, another metrical information of this bay device under the redundant main control unit each other of automatic synchronization.
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| CN102255378A (en) * | 2011-07-29 | 2011-11-23 | 河南省电力公司信阳供电公司 | Operation judging method for intelligent backup power automatic switching device |
| CN102437654B (en) * | 2011-12-31 | 2014-01-15 | 国电南京自动化股份有限公司 | Station control realizing method based on monitoring system |
| CN102645919A (en) * | 2012-04-01 | 2012-08-22 | 国电南瑞科技股份有限公司 | Switching device for refitting transformer station automatic system and switching method thereof |
| CN103427479B (en) * | 2013-08-15 | 2015-04-08 | 国家电网公司 | Method for switching safety power sources of power plant on basis of DCS (distributed control system) |
| CN103455463B (en) * | 2013-09-06 | 2015-10-28 | 北京四方继保自动化股份有限公司 | A kind of main control unit communication accesses and produces method |
| CN104578397B (en) * | 2013-10-22 | 2017-08-01 | 苏州万龙电气集团股份有限公司 | Redundancy control method and device for direct current brake in unattended direct current traction station |
| CN105305602B (en) * | 2015-11-03 | 2017-07-04 | 成都交大许继电气有限责任公司 | The standby power system of railway digital traction substation and its haul oneself willingly into method |
| FR3063189B1 (en) * | 2017-02-17 | 2019-06-07 | Schneider Electric Industries Sas | METHOD FOR CONTROLLING A SOURCE INVERTER AND SOURCE INVERTER USING SUCH A METHOD |
| CN107732877B (en) * | 2017-11-06 | 2019-07-16 | 成都交大许继电气有限责任公司 | Railway distribution substation intelligence mother protection supervisory equipment |
| CN112928733A (en) * | 2021-04-13 | 2021-06-08 | 南京工业职业技术大学 | Distributed spare power automatic switching system and control method thereof |
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| US4651020A (en) * | 1985-09-10 | 1987-03-17 | Westinghouse Electric Corp. | Redundant power supply system |
| CN201215898Y (en) * | 2008-06-27 | 2009-04-01 | 南京南瑞继保电气有限公司 | Backup auto-activating device having remote auto-activating function |
| CN101673965B (en) * | 2009-10-14 | 2012-08-08 | 华南理工大学 | Automatic switching control method for wide-area emergency power source of electric power system |
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Effective date of registration: 20190322 Address after: 100085 9, four street, Shang Di information industry base, Haidian District, Beijing. Co-patentee after: Beijing Sifang Jibao Engineering Technology Co., Ltd. Patentee after: Beijing Sifang Jibao Automation Co., Ltd. Address before: 100085 9, four street, Shang Di information industry base, Haidian District, Beijing. Patentee before: Beijing Sifang Jibao Automation Co., Ltd. |
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