CN101577433A - Method for inquiring heavy load of ship power station power management - Google Patents
Method for inquiring heavy load of ship power station power management Download PDFInfo
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- CN101577433A CN101577433A CNA2009100330424A CN200910033042A CN101577433A CN 101577433 A CN101577433 A CN 101577433A CN A2009100330424 A CNA2009100330424 A CN A2009100330424A CN 200910033042 A CN200910033042 A CN 200910033042A CN 101577433 A CN101577433 A CN 101577433A
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Abstract
The invention discloses a method for inquiring heavy load of ship power station power management. The method presets an abrupt change quantity of power station load power and makes a reasonable judgment so as to avoid whole ship power off accidents caused by electric network breakdown due to abrupt changes of the load power and ensure the navigational safety of a ship. The method mainly comprises the following steps: calculating the gross capacity nPe of a generating set; calculating the actually output total power sigmaPi; calculating the potential change quantity Pa (Pa=Pmax-Po) of an input high-power load, wherein the Pmax is the rated power of the high-power load, and the Po is the initial power of the high-power load in running; calculating the value of P (P=nPe-sigmaPi-Pa-Ps), wherein the Ps is the power of a high-power load to be input; and judging whether the value of the P is larger than an allowed power margin D1, if so, allowing the high-power load to be started, otherwise, inputting a standby generator, and judging whether the high-power load is allowed to be started again.
Description
Technical field
The present invention relates to a kind of power station power management method for inquiring heavy load, relate in particular to a kind of method for inquiring heavy load of ship power station power management, belong to the Ship Power Station technical field.
Background technology
The power management of Ship Power Station is according to the electrical network loading condition, and the start-stop diesel generating set makes the power station operate in optimum state automatically, reaches better economic.High power load can directly drop into when the grid power allowance is sufficient, need treat that when the grid power allowance is not rich the stand-by generator starting drops into operation of power networks after, just allow high power load to start.Management is reliable to existing power management method for constant power load (starting operation back loading power is invariable), but the heavy duty management big for variable power exists drawback, when needs start heavy duty before when inquire in automatic power station, existing power management method is not given when the rich amount of calculating grid power and has been in the enough power of high power load reservation that initial launch state (consumed power is often very little during the initial launch state) and power can suddenly change, promptly do not consider the potential power variable quantity Pa of high power load, like this, when after power management system calculates, satisfying the rich amount of grid power, then send starting and allow signal to give other high power load starting; If several the high power loads that are under the initial launch power rating add high-power simultaneously, perhaps allow in the starting process at next high power load, the high power load that perhaps is in the initial launch state adds suddenly when high-power, the power station often has little time to drop into the stand-by generator group, thereby make operating generating set cause full ship dead electricity accident, produce serious consequence owing to the unexpected change of bearing power causes mains breakdown greatly.Therefore, press for existing power station power management method is improved, especially need to design a kind of new method for inquiring heavy load avoiding, thereby guarantee navigation safety because of the Ship Power Station chugging causes full ship dead electricity accident.
Summary of the invention
The object of the present invention is to provide a kind of method for inquiring heavy load of ship power station power management, avoiding taking place several the high power loads that are under the initial launch power rating adds high-power simultaneously, perhaps because of high power load in starting process, the high power load that has been in the initial launch state adds high-power suddenly, causes mains breakdown and causes the accident of full ship dead electricity.
Purpose of the present invention is achieved by the following technical programs.
Method for inquiring heavy load of ship power station power management comprises the following step:
(1) judged whether the high power load request;
(2) if the judged result of step (1) for having then execution in step (3);
(3) Ship ' plant generator unit total capacity nPe, Pe is the rated power of separate unit generator;
(4) calculate actual output gross power ∑ Pi;
(5) calculate the potential variable quantity Pa of high power load that has dropped into, Pa=Pmax-Po, wherein Pmax is the rated power of the power termination that has high input, the initial power when Po is the high power load operation;
(6) calculate the P value, P=nPe-∑ Pi-Pa-Ps, wherein the high power load power of Ps for being about to drop into;
(7) judge that whether the P value is greater than allowing power headroom D1;
(8) if the judged result of step (7) for being, then allows high power load to start;
(9) high power load operation;
(10) if the judged result of step (7) for not, then starts stand-by generator to devote oneself to work;
(11) judge whether the stand-by generator input is successful;
(12) if, then getting back to step (3) for being, the judged result of step (11) continues to carry out downwards;
(13) if the judged result of step (11) is not, then high power load request failure;
(14) if the judged result of step (1) is nothing, then Ship ' plant generator unit total capacity nPe;
(15) calculate actual output gross power ∑ Pi;
(16) calculate P=nPe-∑ Pi;
(17) judge that whether the P value is greater than the D2 value;
(18) if the judged result of step (17) is for being then to reduce by a generator job;
(19) if the judged result of step (17) for not, judges that then whether the P value is less than the D3 value;
(20) if the judged result of step (19) is for being then to increase a generator job;
(21) if the judged result of step (19) for not, is kept the quantity of former work generator.
Purpose of the present invention can also further realize by following technical measures:
Aforementioned permission power headroom D1=0.5Ps, D2=1.5Pe, D3=0.25Pe.
Compared with prior art, the invention has the beneficial effects as follows: when high power load carries out inquiring heavy load, this method has been considered the unexpected variable quantity of power station bearing power in advance, and make rational judgement, thereby the full ship dead electricity accident of avoiding chugging to cause the generating set overcurrent tripping to cause guarantees navigation safety.
Description of drawings
Fig. 1 is the method for inquiring heavy load of ship power station power management program flow diagram;
Fig. 2 is an inquiring heavy load of ship power station power management single wire circuit schematic diagram (three-phase electricity is represented with single line).
Embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments.
As Fig. 1, shown in Figure 2, the power measurement module of the present invention by being provided with in high power load side (non-constant power load), the initial consumed power value of high power load is delivered to power management system after measuring in real time, power management system just can take into account the potential power variable quantity of the high power load that has been in the initial launch state when carrying out electrical network affluence power calculation, after just the power management system dump power that all the time those is not in the high power load of rated power operation was reserved out, row judged whether next high power load allows to start when inquiring heavy load again.
Embodiment one:
Present embodiment is that the electric power system with certain chemicals oil carrier is an example.This ship adopts the 400V AC electric power systems, and main power source is equipped with 3 670KW generating sets, and wherein high power load needs through the power management system inquiring heavy load, and can starting operation after power management system is judged permission
Inquiring heavy load equipment has: 4 250KW Cargo Oil Pumps (Cargo Oil Pump changes Oil pump electrical machinery power by adjusting valve), when 1 generator during to the power supply of full ship, need carry out the high power load inquiring heavy load this moment, carrying out computing through power management system, to make the step of reasonable judgement as follows: (annotate: the step of being given an example is the 2nd a high power load inquiring heavy load here, the 1st high power load power management system judges that the back allows starting, and the initial power during the high power load operation is 65KW.)
The inquiry step is as follows:
(1) judged whether the high power load request;
(2) if the judged result of step (1) for having then execution in step (3);
(3) Ship ' plant generator unit total capacity nPe;
nPe＝1×670KW＝670KW
(4) calculate actual output gross power ∑ Pi;
Actual online load is measured as 280KW
(5) calculate the potential variable quantity Pa of high power load that has dropped into, Pa=Pmax-Po;
Pa＝Pmax-Po＝250-65＝185KW
(6) calculate the P value, P=nPe-∑ Pi-Pa-Ps, wherein the high power load power of Ps for being about to drop into;
P＝nPe-∑Pi-Pa-Ps＝670-280-185-250＝-45KW
(7) judge that whether the P value is greater than allowing power headroom D1;
D1＝-45KW＜0.5Ps
(8) if the judged result of step (7) for being, then allows high power load to start;
Judged result does not allow high power load to start for not;
(9) high power load operation;
Conclusion: can not move;
(10) if the judged result of step (7) for not, then starts stand-by generator to devote oneself to work;
Conclusion: the judged result of step (7) starts stand-by generator and devotes oneself to work for not;
(11) judge whether the stand-by generator input is successful;
Conclusion: drop into successfully;
(12) if, then getting back to step (3) for being, the judged result of step (11) continues to carry out downwards;
Conclusion: get back to step (3) and continue to carry out downwards;
Return (3) Ship ' plant generator unit total capacity nPe:
nPe＝2×670KW＝1340KW
Return (4) and calculate actual output gross power ∑ Pi;
∑Pi＝280KW
Return (5) and calculate the potential variable quantity Pa of high power load that has dropped into, Pa=Pmax-Po,
Pa＝Pmax-Po＝250-65＝185KW
Return (6) and calculate the P value, P=nPe-∑ Pi-Pa-Ps, wherein the high power load power of Ps for being about to drop into;
P＝nPe-∑Pi-Pa-Ps＝1340-280-185-250＝625KW
Return (7) and judge that whether the P value is greater than allowing power headroom D1;
D1＝625KW＞0.5Ps
Return (8) if the judged result of step (7) for being, then allows high power load to start;
Conclusion: judged result is for being the startup of permission high power load.
Return the operation of (9) high power load;
The high power load operation.
Existing power management computational methods are as follows:
Step 6) is that power management system calculates the committed step whether decision allows the high power load starting in the present embodiment, as in traditional power management method when second high power load inquiry, calculating grid power allowance:
P＝nPe-∑Pi＝670-280＝390KW
The back as calculated margin of power of power management this moment has satisfied the heavy-load start requirement, promptly sends second high power load starting and allows signal to start to high power load.Same when the 3rd high power load inquiring heavy load, the high power load initial power that has been in initial launch owing to the front is often very little, calculates the grid power allowance:
P＝nPe-∑Pi＝670-280-65＝325KW
(annotate: 65KW is the 2nd a high power load initial launch power)
The back as calculated margin of power of power management this moment has satisfied the heavy-load start requirement, promptly sending the 3rd high power load starting allows signal to start to high power load, 3 high power loads have all allowed starting and have been in the initial launch power rating, like this, when if these 3 high power loads that are in the initial launch state add high-power simultaneously, perhaps in next high power load starting process, if before being in the high power load of initial launch state adds high-power suddenly, will cause this moment the main generator that moving since high power load the time starting (bearing power sudden change) cause the collapse of electrical network, cause full ship dead electricity serious consequence.
The present invention has introduced a kind of new power calculation: the realtime power that has promptly increased high power load on hardware is measured (the only high power load that can change power), high power load after detecting in real time, the power that has consumed on the electrical network is delivered to power management system, power management system will be in the initial launch state all the time when the rated output allowance high power load does not also reach that part of dump power of rated power and reserves out, behind the dump power deduction that the power management inquiring heavy load at first also not have the high power load of front to consume when judging next high power load inquiry and rated output allowance, go again and judge whether margin of power allows new high-power starting.
In the present embodiment, the inquiring heavy load step 6) is owing to considered the potential power variable quantity of high power load, do not allow signal so send heavy-load start for next high power load at once, but send the heavy-load start permission again after dropping into a standby main generator earlier, just owing to causing electrical network greatly, the unexpected change of bearing power impacts the serious consequence that causes mains breakdown with regard to having avoided like this at operating generating set.
In addition to the implementation, the present invention can also have other execution modes, and all employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop in the protection range of requirement of the present invention.
Claims (2)
1. a method for inquiring heavy load of ship power station power management is characterized in that, this method comprises the following step:
(1) judged whether the high power load request;
(2) if the judged result of step (1) for having then execution in step (3);
(3) Ship ' plant generator unit total capacity nPe, Pe is the rated power of separate unit generator;
(4) calculate actual output gross power ∑ Pi;
(5) calculate the potential variable quantity Pa of high power load that has dropped into, Pa=Pmax-Po, wherein Pmax is the rated power of the power termination that has high input, the initial power when Po is the high power load operation;
(6) calculate the P value, P=nPe-∑ Pi-Pa-Ps, wherein the high power load power of Ps for being about to drop into;
(7) judge that whether the P value is greater than allowing power headroom D1;
(8) if the judged result of step (7) for being, then allows high power load to start;
(9) high power load operation;
(10) if the judged result of step (7) for not, then starts stand-by generator to devote oneself to work;
(11) judge whether the stand-by generator input is successful;
(12) if, then getting back to step (3) for being, the judged result of step (11) continues to carry out downwards;
(13) if the judged result of step (11) is not, then high power load request failure;
(14) if the judged result of step (1) is nothing, then Ship ' plant generator unit total capacity nPe;
(15) calculate actual output gross power ∑ Pi;
(16) calculate P=nPe-∑ Pi;
(17) judge that whether the P value is greater than the D2 value;
(18) if the judged result of step (17) is for being then to reduce by a generator job;
(19) if the judged result of step (17) for not, judges that then whether the P value is less than the D3 value;
(20) if the judged result of step (19) is for being then to increase a generator job;
(21) if the judged result of step (19) for not, is kept the quantity of former work generator.
2, method for inquiring heavy load of ship power station power management as claimed in claim 1 is characterized in that, described permission power headroom D1=0.5Ps, D2=1.5Pe, D3=0.25Pe.
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Cited By (8)
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| CN102185340A (en) * | 2011-04-06 | 2011-09-14 | 上海恩艾思电气有限公司 | Ship power management system |
| CN103094925A (en) * | 2011-10-27 | 2013-05-08 | 中集船舶海洋工程设计研究院有限公司 | Intermediate voltage power station for ship |
| CN106208086A (en) * | 2016-07-20 | 2016-12-07 | 国网北京市电力公司 | Power grid control method and apparatus |
| CN107979868A (en) * | 2011-01-07 | 2018-05-01 | 交互数字专利控股公司 | For managing the method and WTRU of power headroom reporting (PHR) |
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| US4454509A (en) * | 1980-02-27 | 1984-06-12 | Regency Electronics, Inc. | Apparatus for addressably controlling remote units |
| JP2000069675A (en) * | 1998-08-25 | 2000-03-03 | Fuji Electric Co Ltd | Electric power storage power supply system, electric power supply method and electric power feed method |
| CN101409451A (en) * | 2007-10-09 | 2009-04-15 | 上海万德风力发电股份有限公司 | Multi-fan parallel connection type wind-light complementation power generation system |
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| CN107979868A (en) * | 2011-01-07 | 2018-05-01 | 交互数字专利控股公司 | For managing the method and WTRU of power headroom reporting (PHR) |
| CN102185340A (en) * | 2011-04-06 | 2011-09-14 | 上海恩艾思电气有限公司 | Ship power management system |
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| CN108011371A (en) * | 2017-12-15 | 2018-05-08 | 上海市建工设计研究总院有限公司 | One kind building stand-by power supply electricity generation system |
| CN108011371B (en) * | 2017-12-15 | 2019-12-06 | 上海市建工设计研究总院有限公司 | Building stand-by power supply power generation system |
| CN109830953A (en) * | 2019-04-02 | 2019-05-31 | 山西汾西重工有限责任公司 | The power distribution method of diesel generating set based on direct current networking electricity generation system |
| CN109830953B (en) * | 2019-04-02 | 2020-05-15 | 山西汾西重工有限责任公司 | Power distribution method of diesel generator set based on direct-current networking power generation system |
| CN110535047A (en) * | 2019-08-22 | 2019-12-03 | 中船绿洲镇江船舶辅机有限公司 | A kind of heavy duty inquiry electric cabinet and its control method |
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Assignee: ZHENJIANG SAIERNICO ELECTRIC & AUTOMATION Co.,Ltd. Assignor: ZHENJIANG SAIERNICO AUTOMATION Co.,Ltd. Contract record no.: 2012320000442 Denomination of invention: Method for inquiring heavy load of ship power station power management Granted publication date: 20111102 License type: Exclusive License Open date: 20091111 Record date: 20120412 |
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Address after: 212009 No. 19, Dingmao South Weier Road, Zhenjiang New District, Zhenjiang City, Jiangsu Province Patentee after: Zhenjiang saiernico Automation Co.,Ltd. Address before: 212009 Zhenjiang city in Jiangsu Province Economic Development Zone South Road two Patentee before: ZHENJIANG SAIERNICO AUTOMATION Co.,Ltd. |