CN100336278C - Antomatic quasi-simultaneous interconnecting method of leftover pressure turbine generating unit of high furnace gas - Google Patents
Antomatic quasi-simultaneous interconnecting method of leftover pressure turbine generating unit of high furnace gas Download PDFInfo
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- CN100336278C CN100336278C CNB2004100260293A CN200410026029A CN100336278C CN 100336278 C CN100336278 C CN 100336278C CN B2004100260293 A CNB2004100260293 A CN B2004100260293A CN 200410026029 A CN200410026029 A CN 200410026029A CN 100336278 C CN100336278 C CN 100336278C
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- 238000011084 recovery Methods 0.000 claims description 58
- 238000001514 detection method Methods 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- 230000001360 synchronised effect Effects 0.000 abstract 5
- 230000003247 decreasing effect Effects 0.000 abstract 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 5
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Abstract
The present invention discloses a method for automatically connecting a blast-furnace gas excessive voltage turbine generating device to a network. Firstly, a detecting device in which a synchronous detecting relay is used as a detecting element and a core is arranged between the blast-furnace gas excessive voltage turbine generating device and a power network; voltage, frequency, phase angle signals at a power network side and voltage, frequency, phase angle signals at a generator side are transmitted to the synchronous detecting relay; when the rotary speed of TRT is increased to 90% of rated speed, the PLC or DCS control system of the generating device transmits signals to automatic inputting signals of the synchronous detecting relay; parameters are set to the inner part of the synchronous detecting relay; the synchronous detecting relay detects voltage difference, frequency difference and phase angle difference, transmits voltage increasing or decreasing signals to the excitation regulating system of the generator through an intermediate relay to regulate voltage by automatic increase or decrease and transmits speed increasing or decreasing pulse signals to the PLC or DCS control system of the generating device through an intermediate relay to automatically regulate the rotary speed; when simultaneously meeting the conditions for being connected to a network, the TRT generator is automatically connected to the power network.
Description
Technical field
The invention belongs to the power mechanical engineering field, relate to the method that a kind of blast-furnace top gas recovery turbine generator (Blast Furnace Top Gas Recovery Turbine Unit is hereinafter to be referred as TRT) realizes that automatic presynchronization is incorporated into the power networks.
Background technology
TRT is a top gas energy recuperation turbine generator, is the auxilliary genus equipment of blast furnace, and the power source of TRT device is a blast furnace gas, and the flow of blast furnace gas is very big, pressure is very low; As 2500M
3Blast furnace, gas flow are usually at 40～450,000 M
3About/h, and gas pressure has only about 0.1～0.18MPa, and unstable; The pressure of blast furnace furnace roof is at any time in fluctuation, the size of gas flow is also changing at any time, this turbo generator set in the low discharge high pressure has very big difference, the thermal power generation steam pressure is usually at 2～8MPa, higher tens times than TRT gas pressure, and steam flow has only the part of TRT gas flow, so turbo generator set rotating speed before being incorporated into the power networks is just very stable, usually in ± 2r/min fluctuation, and the TRT generating set before being incorporated into the power networks rotating speed usually ± 50r/min even bigger range; Because the working condition of this complexity of TRT, TRT can only rely on manual realization to be incorporated into the power networks before the end of the year 2000.
Manual accurate simultaneous interconnecting is that operating personnel show blast-furnace top gas recovery turbine generator is connected to the grid with the empiric observation of oneself the manual accurate same period; Low, the poor reliability of this method success rate, being incorporated into the power networks simultaneously, whether successful experience with operating personnel has direct relation, hold bad the opportunity of moment if be incorporated into the power networks, electrical network to the user impacts easily, if operating personnel's experience is not abundant, non-simultaneous interconnecting easily takes place, cause higher level's grid power blackout, influence miscellaneous equipment and normally move, cause immeasurable economic loss.
Summary of the invention
Realize auto-parallel for the TRT device, the purpose of this invention is to provide a kind of blast-furnace top gas recovery turbine generator automatic presynchronization combination method.Make that unit is realized automatic raising speed, boosted automatically, auto-parallel, automatically power per liter, transfer Automatic Control such as roof pressure automatically, increase the technology content of unit, improve the competitiveness of unit in market.
For achieving the above object, the technical scheme that the present invention takes is: blast-furnace top gas recovery turbine generator automatic presynchronization combination method may further comprise the steps:
The first step, detect relay as detecting element the same period that a model at first is set is SYN3000 between blast-furnace top gas recovery turbine generator and electrical network; And be equipped with boost, step-down, raising speed, reduction of speed, closing relay constitute checkout gear; It is to detect same period of SYN3000 relay that grid side voltage, frequency, phase angle signal and blast-furnace top gas recovery turbine generator side voltage, frequency, phase angle signal are sent into model;
Second step, when the blast-furnace top gas recovery turbine generator rotating speed rose to 90% rated speed, sending signal by Programmable Logic Controller PLC in the blast-furnace top gas recovery turbine generator or Distributed Control System DCS was same period of SYN3000 to detect relay to drop into signal automatically as model;
The 3rd step, carry out parameter tuning to detecting relay inside the same period, make Vmax=105V, Vmin=95V ,+dVmax=5V ,-dVmax=5V ,+dfmax=0.2HZ ,-dfmax=0.2HZ, PHImax=10 °, TCBcomp=90ms, tRuntime=40min, tVt=10s, tVv=5s/10V, tfr=15s, tfc=20s/10Hz;
Wherein, Vmax represents the grid side maximum voltage, and Vmin represents the grid side minimum voltage, + dVmax represents that forward voltage is poor, and-dVmax represents that negative voltage is poor, and+dfmax represents that positive frequencies is poor,-dfmax represents the negative sense difference on the frequency, PHImax represents the first phase angular difference, and TCBcomp represents the breaker closing leading time, the tRuntime indication device operating time, tVt represents the voltage-regulation time, tVv represents voltage-regulation speed, and tfr represents the frequency adjustment time, and tfc represents frequency adjustment speed;
The 4th step, the pressure reduction of detecting element detection of grid side and blast-furnace top gas recovery turbine generator side, frequency difference and phase angle difference, and send and boost or the step-down signal is delivered to the blast-furnace top gas recovery turbine generator excitation control system by booster relay or turndown relay, carry out the voltage automatic lifting and regulate, send raising speed or reduction of speed pulse signal and deliver to Programmable Logic Controller or Distributed Control System in the blast-furnace top gas recovery turbine generator, carry out rotating speed and regulate automatically by raising speed relay or reduction of speed relay;
The 5th step, when blast-furnace top gas recovery turbine generator satisfies three conditions being incorporated into the power networks simultaneously, promptly the voltage difference of blast-furnace top gas recovery turbine generator voltage and grid side voltage less than the difference on the frequency of ± 5V, blast-furnace top gas recovery turbine generator frequency and grid side frequency less than the phase angle difference of ± 0.2HZ, the initial phase angle of blast-furnace top gas recovery turbine generator voltage and the initial phase angle of grid side voltage less than ± 10 °; Model is to detect relay the same period of SYN3000 to send the signal that is incorporated into the power networks, and delivers to the blast-furnace top gas recovery turbine generator closing circuit that opens circuit that is incorporated into the power networks by closing relay, and blast-furnace top gas recovery turbine generator is connected to the grid automatically.
TRT automatic presynchronization combination method parameter of the present invention is provided with accurately, the checkout gear type selecting is reasonable, thereby solved the historical problem that blast-furnace top gas recovery turbine generator (TRT) can't be realized auto-parallel, to the TRT auto-parallel is an innovation, and has filled up the blank that domestic blast-furnace top gas recovery turbine generator (TRT) can't be realized auto-parallel.
Description of drawings
Fig. 1 detects relay circuit figure the same period;
Fig. 2 detects the relay schematic diagram that automatically adjusts the same period;
Fig. 3 is a TRT device auto-parallel schematic diagram;
Fig. 4 is a control flow chart.
Parameter symbol description among the above-mentioned figure:
PT-be the generator outlet voltage transformer
TQMa-generating pusher side signal
TQMa '-grid side signal
TQMb-generating pusher side and grid side reference signal
1KA-circuit breaker anti-trip relay
2KA-automatic booster relay
3KA-automatic turndown relay
4KA-automatic raising speed relay
5KA-automatic reduction of speed relay
6KA-auto-parallel relay
Detect relay SYN3000-same period
2SA.3SA-assisted Selection switch
PLC (or DCS)-unit control system (Programmable Logic Controller or Distributed Control System)
KA1-generating unit speed signal
1THM.2THM.3THM the little bus of-asynchronous switch-on
The little bus of+KM.-KM-control
Excitation-generator excitation regulating system
1SA-switch manually is incorporated into the power networks
FU1.FU2.FU3.FU4-fuse
Vmax-grid side maximum voltage
Vmin-grid side minimum voltage
+ dVmax-forward voltage is poor
-dVmax-negative voltage is poor
+ dfmax-positive frequencies is poor
-dfmax-negative sense difference on the frequency
PHImax-first phase angular difference
TCBcomp-breaker closing leading time
TRuntime-device operating time
TVt-voltage-regulation time
TVv-voltage-regulation speed
Tfr-frequency adjustment time
Tfc-frequency adjustment speed
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing.
According to technique scheme, the present invention includes following steps:
1) at first adopts and detect relay SYN3000 the same period as detecting element; And be equipped with boost, step-down, raising speed, reduction of speed, closing relay; Grid side voltage, frequency, phase angle signal (TQMa, TQMb) and generating pusher side voltage, frequency, phase angle signal (TQMa ', TQMb) are sent into and detected relay SYN3000 the same period; Physical circuit is referring to Fig. 1.
2) when the TRT rotating speed rises to 90% rated speed, send signal by machine set PLC (or DCS) control system and drop into signal (accompanying drawing 1) automatically as detecting relay the same period.
In Fig. 1,220VAC detects relay SYN3000 working power the same period, pass through FU3, detect the FU4 fuse and the same period relay and drop into switch 3SA access (13,14), 220VDC is 2KA, 3KA, 4KA, 5KA, 6KA promptly boosts, step-down, raising speed, reduction of speed, combined floodgate auxiliary relay working power, grid side voltage, frequency, phase angle signal (TQMa, TQMb) and blast-furnace top gas recovery turbine generator side voltage, frequency, phase angle signal (TQMa ', TQMb) insert by 3SA and detect relay (31 same period, 32,34,35), when the TRT unit need be incorporated into the power networks, 2SA is beaten at automated location, 3SA beats in the service position, machine set PLC when the TRT rotating speed rises to 90% rated speed (or DCS) control signal KA1 contact auto-closing will detect relay SYN3000 the same period and devote oneself to work automatically, detect relay SYN3000 the same period and detect pressure reduction automatically, frequency difference and phase angle difference, the 2KA auxiliary relay work of boosting when needs boost, and the 2KA contact point signal is sent into the blast-furnace top gas recovery turbine generator excitation system boost automatically, 3KA step-down auxiliary relay work when the needs step-down, and the 3KA contact point signal is sent into the blast-furnace top gas recovery turbine generator excitation system carry out automatic step-down, 4KA raising speed auxiliary relay work when the needs raising speed, and the 4KA contact point signal is sent into blast-furnace top gas recovery turbine generator PLC (or DCS) control system carry out automatic raising speed, 5KA reduction of speed auxiliary relay work when the needs reduction of speed, and the 5KA contact point signal is sent into blast-furnace top gas recovery turbine generator PLC (or DCS) control system carry out automatic reduction of speed, 6KA combined floodgate auxiliary relay work when detecting relay SYN3000 and detect three conditions that are incorporated into the power networks and satisfy simultaneously the same period, and the 6KA contact point signal sent into TRT auto-parallel loop.
3) carry out parameter tuning to detecting relay SYN3000 inside the same period, Vmax=105V, Vmin=95V ,+dVmax=5V ,-dVmax=5V ,+dfmax=0.2HZ ,-dfmax=0.2HZ, PHImax=10 °, TCBcomp=90ms, tRuntime=40min, tVt=10s, tVv=5s/10V, tfr=15s, tfc=20s/10Hz.
In the formula, Vmax-grid side maximum voltage, Vmin-grid side minimum voltage, + dVmax-forward voltage is poor, and-dVmax-negative voltage is poor, and+dfmax-positive frequencies is poor,-dfmax-negative sense difference on the frequency, PHImax-first phase angular difference, TCBcomp-breaker closing leading time, tRuntime-device operating time, tVt-voltage-regulation time, tVv-voltage-regulation speed, tfr-frequency adjustment time, tfc-frequency adjustment speed;
4) detecting element detects pressure reduction, frequency difference and phase angle difference, and send and boost or the step-down signal is delivered to the blast-furnace top gas recovery turbine generator excitation control system by 2KA or 3KA auxiliary relay, carry out the voltage automatic lifting and regulate, send raising speed or the reduction of speed pulse signal is delivered to blast-furnace top gas recovery turbine generator PLC (or DCS) control system by 4KA raising speed auxiliary relay or 5KA reduction of speed auxiliary relay, carry out rotating speed and regulate (accompanying drawing 2) automatically.
5) (voltage difference of blast-furnace top gas recovery turbine generator voltage and grid side voltage is less than ± 5V when blast-furnace top gas recovery turbine generator (TRT) satisfies three conditions being incorporated into the power networks simultaneously, the difference on the frequency of blast-furnace top gas recovery turbine generator frequency and grid side frequency is less than ± 0.2HZ, the phase angle difference of initial phase angle of blast-furnace top gas recovery turbine generator voltage and the initial phase angle of grid side voltage is less than ± 10 °), detect relay SYN3000 the same period and send the signal that is incorporated into the power networks, and deliver to the blast-furnace top gas recovery turbine generator closing circuit that opens circuit that is incorporated into the power networks by 6KA combined floodgate auxiliary relay, TRT is connected to the grid automatically, realizes TRT device auto-parallel (Fig. 3).
In Fig. 3, + KM1 combined floodgate positive supply is by FU1 fuse → 2SA (1,2) → KSC contact (550,722) → 2SA (3,4) → 6KA (detects relay SYN3000 auto-parallel contact 257 same period, 723) → 2SA (11,12) → 1SA (5,8) → 1KA (115,119) → the blast-furnace top gas recovery turbine generator breaker switching-on mechanism (119 that is incorporated into the power networks, 102) → FU2 fuse → combined floodgate negative supply-KM1 formation auto-parallel loop, when auto-parallel contact 6KA combined floodgate auxiliary relay is closed, connect the blast-furnace top gas recovery turbine generator breaker switching-on mechanism that is incorporated into the power networks, (TRT) is connected to the grid automatically with blast-furnace top gas recovery turbine generator.
6) control flow chart
Control flow chart is referring to Fig. 4, in Fig. 4, PT is a blast-furnace top gas recovery turbine generator side voltage transformer, be to be used for detecting blast-furnace top gas recovery turbine generator side voltage, frequency and phase angle, and with blast-furnace top gas recovery turbine generator side voltage, frequency and phase angle signal feed back to and detect relay SYN3000 and grid side voltage the same period, frequency, phase angle signal compares, detect relay SYN3000 the same period and detect pressure reduction automatically according to signal, frequency difference and phase angle difference, and send boost signal and deliver to the blast-furnace top gas recovery turbine generator excitation control system and boost automatically by the 2KA auxiliary relay that boosts, sending the step-down signal delivers to the blast-furnace top gas recovery turbine generator excitation control system by 3KA step-down auxiliary relay and carries out automatic step-down, sending the raising speed pulse signal delivers to machine set PLC (or DCS) control system by 4KA raising speed auxiliary relay and carries out automatic raising speed, sending the reduction of speed pulse signal delivers to machine set PLC (or DCS) control system by 5KA reduction of speed auxiliary relay and carries out automatic reduction of speed, 6KA combined floodgate auxiliary relay work when detecting relay SYN3000 and detect three conditions that are incorporated into the power networks and satisfy simultaneously the same period, and the 6KA contact point signal sent into blast-furnace top gas recovery turbine generator (TRT) auto-parallel loop, (TRT) is connected to the grid automatically with blast-furnace top gas recovery turbine generator.
According to technique scheme, the applicant is at the Kunming iron and steel 2500M of group company
3Realize auto-parallel first during the experiment of blast furnace TRT device, and at Shoudu Iron and Steel Co 3#2500M
3Blast furnace TRT, Shoudu Iron and Steel Co 1#2500M
3Blast furnace TRT device, Hangzhou Steel Company 450M
3Blast furnace TRT device, Jiuquan iron and steel 1650M of group company
3Be verified on the blast furnace TRT device, realized auto-parallel; Particularly during the test run of Shoudu Iron and Steel Co first cover TRT unit, only promptly realize auto-parallel 2 seconds after will detecting the relay input same period.
Facts have proved that TRT automatic presynchronization grid-connected system parameter is provided with accurately, the checkout gear type selecting is reasonable, thereby solved the historical problem that blast-furnace top gas recovery turbine generator (TRT) can't be realized auto-parallel, used more than 20 cover at present.
Claims (1)
1, a kind of method of blast-furnace top gas recovery turbine generator auto-parallel is characterized in that, may further comprise the steps:
The first step, detect relay as detecting element the same period that a model at first is set is SYN3000 between blast-furnace top gas recovery turbine generator and electrical network; And be equipped with boost, step-down, raising speed, reduction of speed, closing relay constitute checkout gear; It is to detect same period of SYN3000 relay that grid side voltage, frequency, phase angle signal and blast-furnace top gas recovery turbine generator side voltage, frequency, phase angle signal are sent into model;
Second step, when the blast-furnace top gas recovery turbine generator rotating speed rose to 90% rated speed, sending signal by Programmable Logic Controller PLC in the blast-furnace top gas recovery turbine generator or Distributed Control System DCS was same period of SYN3000 to detect relay to drop into signal automatically as model;
The 3rd step, to model is same period of SYN3000 to detect relay inside to carry out parameter tuning, make Vmax=105V, Vmin=95V ,+dVmax=5V ,-dVmax=5V ,+dfmax=0.2HZ ,-dfmax=0.2HZ, PHImax=10 °, TCBcomp=90ms, tRuntime=40min, tVt=10s, tVv=5s/10V, tfr=15s, tfc=20s/10Hz;
Wherein, Vmax represents the grid side maximum voltage, and Vmin represents the grid side minimum voltage, + dVmax represents that forward voltage is poor, and-dVmax represents that negative voltage is poor, and+dfmax represents that positive frequencies is poor,-dfmax represents the negative sense difference on the frequency, PHImax represents the first phase angular difference, and TCBcomp represents the breaker closing leading time, the tRuntime indication device operating time, tVt represents the voltage-regulation time, tVv represents voltage-regulation speed, and tfr represents the frequency adjustment time, and tfc represents frequency adjustment speed;
The 4th step, the pressure reduction of detecting element detection of grid side and blast-furnace top gas recovery turbine generator side, frequency difference and phase angle difference, and send and boost or the step-down signal is delivered to the blast-furnace top gas recovery turbine generator excitation control system by booster relay or turndown relay, carry out the voltage automatic lifting and regulate, send raising speed or reduction of speed pulse signal and deliver to Programmable Logic Controller or Distributed Control System in the blast-furnace top gas recovery turbine generator, carry out rotating speed and regulate automatically by raising speed relay or reduction of speed relay;
The 5th step, when blast-furnace top gas recovery turbine generator satisfies three conditions being incorporated into the power networks simultaneously, promptly the voltage difference of blast-furnace top gas recovery turbine generator voltage and grid side voltage less than the difference on the frequency of ± 5V, blast-furnace top gas recovery turbine generator frequency and grid side frequency less than the phase angle difference of ± 0.2HZ, the initial phase angle of blast-furnace top gas recovery turbine generator voltage and the initial phase angle of grid side voltage less than ± 10 °; Model is to detect relay the same period of SYN3000 to send the signal that is incorporated into the power networks, and delivers to the blast-furnace top gas recovery turbine generator closing circuit that opens circuit that is incorporated into the power networks by closing relay, and blast-furnace top gas recovery turbine generator is connected to the grid automatically.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100260293A CN100336278C (en) | 2004-04-08 | 2004-04-08 | Antomatic quasi-simultaneous interconnecting method of leftover pressure turbine generating unit of high furnace gas |
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| CNB2004100260293A CN100336278C (en) | 2004-04-08 | 2004-04-08 | Antomatic quasi-simultaneous interconnecting method of leftover pressure turbine generating unit of high furnace gas |
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| CN1564418A CN1564418A (en) | 2005-01-12 |
| CN100336278C true CN100336278C (en) | 2007-09-05 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100365135C (en) * | 2005-04-13 | 2008-01-30 | 浙江大学 | Furnance top pressure control method based on resistance coefficient equivalent |
| DE102006050077A1 (en) * | 2006-10-24 | 2008-05-08 | Repower Systems Ag | Inverter with controllable phase angle |
| CN101291067B (en) * | 2007-04-17 | 2011-08-31 | 上海申瑞电力科技股份有限公司 | Graphic method for synchronous checking |
| CN101604847B (en) * | 2009-07-06 | 2011-05-25 | 西安陕鼓动力股份有限公司 | Automatic switching method of automatic synchronized grid-connection device |
| CN110233491B (en) * | 2018-09-27 | 2022-09-27 | 襄阳航力机电技术发展有限公司 | Hydrogen peroxide tail gas residual pressure power generation grid-connected method and control system thereof |
| CN114264941B (en) * | 2021-11-01 | 2024-03-26 | 南方电网数字电网研究院有限公司 | Reclosing lead time determining method and device and relay protection equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5473528A (en) * | 1991-09-18 | 1995-12-05 | Kabushiki Kaisha Toshiba | Parallel connection of different types of AC power supplies of differing capacities |
| US5642006A (en) * | 1993-03-19 | 1997-06-24 | Elin Energieversorgung Gesellschaft Mbh | Synchronizing device |
| CN2312538Y (en) * | 1997-11-07 | 1999-03-31 | 浙江大学 | Arrangement for connection of generator unit to a network |
-
2004
- 2004-04-08 CN CNB2004100260293A patent/CN100336278C/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5473528A (en) * | 1991-09-18 | 1995-12-05 | Kabushiki Kaisha Toshiba | Parallel connection of different types of AC power supplies of differing capacities |
| US5642006A (en) * | 1993-03-19 | 1997-06-24 | Elin Energieversorgung Gesellschaft Mbh | Synchronizing device |
| CN2312538Y (en) * | 1997-11-07 | 1999-03-31 | 浙江大学 | Arrangement for connection of generator unit to a network |
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Owner name: XI'AN SHANGU MOTOR CO., LTD. Free format text: FORMER OWNER: SHAANXI BLOWER (GROUP) CO., LTD. Effective date: 20071109 |
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Effective date of registration: 20071109 Address after: 710611 King Town, Lintong District, Shaanxi, Xi'an Patentee after: XI'AN SHAANGU POWER Co.,Ltd. Address before: 710611 Lintong Shaanxi blower (Group) Co., Ltd., Shaanxi Province Patentee before: Shaanxi Blower (Group) Co.,Ltd. |
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