CN103701112B - Operation of power networks state shot and long term weak link recognition system and method - Google Patents
Operation of power networks state shot and long term weak link recognition system and method Download PDFInfo
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- CN103701112B CN103701112B CN201310387445.5A CN201310387445A CN103701112B CN 103701112 B CN103701112 B CN 103701112B CN 201310387445 A CN201310387445 A CN 201310387445A CN 103701112 B CN103701112 B CN 103701112B
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Abstract
The present invention relates to a kind of operation of power networks state shot and long term weak link recognition system and method, this recognition system comprises operational mode generation module, start-up simulation module, reads object module, comparison module and identification module; This recognition methods comprises the following steps: (1) periodically reads the real-time running data of electrical network, generates operational mode file to be analyzed; (2) online startup stability margin evaluating system and BPA simulation calculation software; (3) simulation result of stability margin evaluating system and BPA simulation calculation software is read; (4) the relevant limit value that simulation result and the relevant regulations stored in database and field apparatus run constraints is compared, the result and record transfinites; (5) result that transfinites is identified, judge to belong to long-term weak link or short-term weak link.This system and method is conducive to the shot and long term weak link automatically identifying electrical network, and quick and precisely, reliability is high.
Description
Technical field
The present invention relates to POWER SYSTEM STATE assessment technology field, particularly a kind of operation of power networks state shot and long term weak link recognition system and method.
Background technology
The weak link of electric power system is divided into three kinds: the first is the weak link of short-term, occurs once in a while within 1 year, is relevant with the unreasonable arrangement of operational mode; The second is seasonal weak link, all can occur in the annual fixing period, relevant with the seasonal variety of Fujian Province's weather; The third is long-term weak link, regularly occurs in whole year, be develop to the load of electrical network relevant with grid structure.In actual motion, seasonal weak link is included into long-term weak link, gives common attention rate, so that propose solution as early as possible.
Identification in the past for power system weak link often relies on off-line analysis, analyzes under limited, predetermined operational mode.Generally speaking, systems analyst is according to this area operation of power networks feature, set up several typical operation modes of year, carry out tidal current analysis, security analysis, short circuit current level calculating, transient stability scanning, minor interference analysis etc., investigate the permission range of operation whether electrical network electric parameters (comprising: voltage, electric current, power, merit angle, frequency etc.) meets " guiding rules of power system safety and stability " (DL_755-2001) and field apparatus.If the short circuit current of certain node exceedes the rupturing capacity of switch, be then directly judged as long-term weak link.If other analysis results show: certain weak link does not meet " directive/guide " regulation and field apparatus runs constraints, carry out the adjustment of operational mode, comprise: generator output adjustment, load tap changer regulate, reactive-load compensation equipment is thrown and moved back operation etc., if out-of-limit problem cannot be solved by the adjustment of operational mode, security and stability control measurement must be taked, such as: cut the measures such as machine, cutting load, off-the-line, be then judged as long-term weak link.If out-of-limit problem can be solved by the adjustment of operational mode, be then judged as short-term or seasonal weak link.And for the judgement of short-term and seasonal weak link, often judge according to the relation of the power load characteristic of locality, unit output and seasonal climate.Generally speaking, when certain weak link frequently occurs in multiple typical operation modes, even if can solve out-of-limit problem by the adjustment of operational mode, but it should belong to seasonal weak link.In actual motion, if certain equipment at least occurs once out-of-limit every day, then we can be considered as long-term weak link.
The efficiency of this analysis mode is lower, the weak link that a large amount of manual analyses could grasp electrical network comprehensively must be carried out, otherwise the weak link analyzed out is not comprehensive, and entirely accurate cannot judge that this weak link belongs to short-term and still belongs to seasonal or long-term, therefore, cannot accurately judge the urgency solving this weak link, the weak link being related to grid structure for some cannot be resolved, also cannot identify all seasons weak link comprehensively, so as before same period in the coming year to arrive this weak link of reinforcement.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide a kind of operation of power networks state shot and long term weak link recognition system and method, this system and method is conducive to the shot and long term weak link automatically identifying electrical network, and quick and precisely, reliability is high.
For achieving the above object, technical scheme of the present invention is: a kind of operation of power networks state shot and long term weak link recognition system, comprising:
Operational mode generation module, for periodically reading the real-time running data of electrical network, generates operational mode file to be analyzed;
Start-up simulation module, for starting stability margin evaluating system and BPA simulation calculation software online;
Read object module, for reading the simulation result of stability margin evaluating system and BPA simulation calculation software;
Comparison module, compares for the relevant limit value that simulation result and the relevant regulations stored in database and field apparatus are run constraints, the result and record transfinites;
Identification module, for identifying the result that transfinites, judges to belong to long-term weak link or short-term weak link.
Present invention also offers the recognition methods of a kind of operation of power networks state shot and long term weak link, comprise the following steps:
(1) periodically read the real-time running data of electrical network, comprise operational outfit name, generated power is exerted oneself, generator reactive is exerted oneself, load tap changer, reactive-load compensation equipment throw and move back situation, node voltage etc., generate operational mode file to be analyzed;
(2) online startup stability margin evaluating system, carries out stability margin assessment; Online startup BPA simulation calculation software, carries out tidal current analysis, security analysis, calculation of short-circuit current, minor interference analysis etc.;
(3) simulation result of stability margin evaluating system and BPA simulation calculation software is read;
(4) the relevant limit value that simulation result and the relevant regulations stored in database and field apparatus run constraints is compared, the result and record transfinites;
(5) result that transfinites is identified: if the result of (a) calculation of short-circuit current and minor interference analysis transfinites, be directly judged as long-term weak link; If b the result of () stability margin assessment transfinites, if machine, cutting load or without measure are cut in measure, be judged as long-term weak link, if measure is adjust operation mode, go to step (c); C () statistical history data of a year, if the probability that transfinites of this weak link is greater than on average once a day, are then judged as long-term weak link.
Compared to prior art, the invention has the beneficial effects as follows the real-time running data based on electrical network, follow the tracks of the Secular Variation Tendency of operation of power networks state, carry out deep excavation to data, realize the electrical network shot and long term weak link identification based on the assessment of electrical network real-time running state, automaticity is high, quick and precisely, reliability is high, thus ensures that critical weak link is resolved as early as possible, ensures power network safety operation.
Accompanying drawing explanation
Fig. 1 is the implementation structure schematic diagram of the recognition system of the embodiment of the present invention.
Embodiment
Below in conjunction with drawings and the specific embodiments, the present invention is described in further detail.
Operation of power networks state shot and long term weak link recognition system of the present invention, as shown in Figure 1, comprising:
Operational mode generation module, for periodically reading the real-time running data of electrical network, comprise operational outfit name, generated power exerted oneself, generator reactive is exerted oneself, load tap changer, reactive-load compensation equipment throw move back situation, node voltage etc., then generate operational mode file to be analyzed;
Start-up simulation module, for starting OPEN3000 system (stability margin evaluating system) online, carries out stability margin assessment, and online startup BPA simulation calculation software, carries out tidal current analysis, security analysis, calculation of short-circuit current, minor interference analysis etc.;
Read object module, for reading the simulation result of OPEN3000 system and BPA simulation calculation software;
Comparison module, compares for the relevant limit value that simulation result and the relevant regulations stored in database and field apparatus are run constraints, the result and record transfinites;
Identification module, for identifying the result that transfinites, judges to belong to long-term weak link or short-term weak link.
Operation of power networks state shot and long term weak link of the present invention recognition methods, comprises the following steps:
(1) periodically read the real-time running data of electrical network, comprise operational outfit name, generated power is exerted oneself, generator reactive is exerted oneself, load tap changer, reactive-load compensation equipment throw and move back situation, node voltage etc., then generate operational mode file to be analyzed;
(2) online startup OPEN3000 system, carries out stability margin assessment; Online startup BPA simulation calculation software, carries out tidal current analysis, security analysis, calculation of short-circuit current, minor interference analysis etc.;
(3) simulation result of stability margin evaluating system and BPA simulation calculation software is read;
(4) the relevant limit value that simulation result and the relevant regulations stored in database and field apparatus run constraints is compared, the result and record transfinites;
(5) identify the result that transfinites, concrete steps are as follows:
If a the result of () calculation of short-circuit current and minor interference analysis transfinites, be directly judged as long-term weak link;
If b the result of () stability margin assessment transfinites, if machine, cutting load or without measure are cut in measure, be judged as long-term weak link, if measure is adjust operation mode, go to step (c);
C () statistical history data of a year, if the probability that transfinites of this weak link is greater than on average once a day, are then judged as long-term weak link.
Be more than preferred embodiment of the present invention, all changes done according to technical solution of the present invention, when the function produced does not exceed the scope of technical solution of the present invention, all belong to protection scope of the present invention.
Claims (2)
1. an operation of power networks state shot and long term weak link recognition system, is characterized in that, comprising:
Operational mode generation module, for periodically reading the real-time running data of electrical network, generates operational mode file to be analyzed;
Start-up simulation module, for starting stability margin evaluating system and BPA simulation calculation software online;
Read object module, for reading the simulation result of stability margin evaluating system and BPA simulation calculation software;
Comparison module, compares for the relevant limit value that simulation result and the relevant regulations stored in database and field apparatus are run constraints, the result and record transfinites;
Identification module, for identifying the result that transfinites, judges to belong to long-term weak link or short-term weak link.
2. the recognition methods of operation of power networks state shot and long term weak link, is characterized in that, comprise the following steps:
(1) periodically read the real-time running data of electrical network, comprise operational outfit title, generated power is exerted oneself, generator reactive is exerted oneself, load tap changer, reactive-load compensation equipment throw and move back situation and node voltage, generate operational mode file to be analyzed;
(2) online startup stability margin evaluating system, carries out stability margin assessment; Online startup BPA simulation calculation software, carries out tidal current analysis, security analysis, calculation of short-circuit current and minor interference analysis;
(3) simulation result of stability margin evaluating system and BPA simulation calculation software is read;
(4) the relevant limit value that simulation result and the relevant regulations stored in database and field apparatus run constraints is compared, the result and record transfinites;
(5) result that transfinites is identified: if the result of (a) calculation of short-circuit current and minor interference analysis transfinites, be directly judged as long-term weak link; If b the result of () stability margin assessment transfinites, if machine, cutting load or without measure are cut in measure, be judged as long-term weak link, if measure is adjust operation mode, go to step (c); C () statistical history data of a year, if the probability that transfinites of this weak link is greater than on average once a day, are then judged as long-term weak link.
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| CN101814736A (en) * | 2010-03-31 | 2010-08-25 | 清华大学深圳研究生院 | Smart grid realization method of on-line voltage-stability safety estimation system |
| CN102157938A (en) * | 2011-04-12 | 2011-08-17 | 哈尔滨工业大学 | Method for online identifying lower-voltage stability nodes of power system |
| CN102324743A (en) * | 2011-09-21 | 2012-01-18 | 国网电力科学研究院 | The online transient safe and stable assessment of electric power system forecast failure screening technique |
| CN103166219A (en) * | 2013-01-30 | 2013-06-19 | 中国电力科学研究院 | Power grid on-line decision-stabilizing control system and control method based on super real-time emulation |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101814736A (en) * | 2010-03-31 | 2010-08-25 | 清华大学深圳研究生院 | Smart grid realization method of on-line voltage-stability safety estimation system |
| CN102157938A (en) * | 2011-04-12 | 2011-08-17 | 哈尔滨工业大学 | Method for online identifying lower-voltage stability nodes of power system |
| CN102324743A (en) * | 2011-09-21 | 2012-01-18 | 国网电力科学研究院 | The online transient safe and stable assessment of electric power system forecast failure screening technique |
| CN103166219A (en) * | 2013-01-30 | 2013-06-19 | 中国电力科学研究院 | Power grid on-line decision-stabilizing control system and control method based on super real-time emulation |
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