CN102565705A - Primary frequency-modulation quantitative evaluation method for eliminating secondary frequency modulation influence based on modulating control system - Google Patents
Primary frequency-modulation quantitative evaluation method for eliminating secondary frequency modulation influence based on modulating control system Download PDFInfo
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- CN102565705A CN102565705A CN2012100115985A CN201210011598A CN102565705A CN 102565705 A CN102565705 A CN 102565705A CN 2012100115985 A CN2012100115985 A CN 2012100115985A CN 201210011598 A CN201210011598 A CN 201210011598A CN 102565705 A CN102565705 A CN 102565705A
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Abstract
The invention belongs to the technical field of measurement, and relates to a primary frequency-modulation quantitative evaluation method for eliminating a secondary frequency modulation influence based on a modulating control system. The method comprises the following steps of: 1, monitoring the rotate speed of a generator set, and judging whether a power grid generates effective disturbance; 2, monitoring the rotate speed of the generator set after effective disturbance, and judging whether the power grid finishes the effective disturbance; 3, based on a load set value of disturbance time, judging whether a secondary frequency modulation is involved in modulation, and calculating the modulating quantity; 4, and quantitatively analyzing and evaluating the rate of change of primary frequency-modulation speed and modulating electric quantity, judging whether the performance is qualified, and storing a result into a data file. According to the method, the defects of the prior art are overcome, the objective evaluation for primary frequency-modulation performance of the generator set is realized, performance evaluation results can be given, and the quality of electric energy and the operation stability of the power grid are really increased.
Description
Technical field
The present invention relates to a kind of primary frequency modulation method for quantitatively evaluating, belong to field of measuring technique based on the influence of regulation and control system elimination frequency modulation frequency modulation.
Background technology
The generating set primary frequency regulation function is to change unit load fast through the unit regulation and control system; Frequency departs from fast during with the responsive electricity grid burst accident; Be the important means of control mains frequency, assurance power network safety operation, the moving performance index of primary frequency modulation are that net factory and power monitoring department make a strategic decision, the important evidence of examination.But by the actual motion analysis, often be accompanied by the action of frequency modulation frequency modulation during the primary frequency modulation action, also often occur anti-the accent sometimes, thereby interfere with the calculating of primary frequency modulation performance.By the control theory analysis; The unit load command value is generally generated by two parts: primary frequency modulation instruction, automatic generation control instruction or the operator that the mains frequency deviation produces after changing sets the frequency modulation frequency modulation instruction of generation; If therefore primary frequency modulation action in the frequency modulation frequency modulation instruction lifting load process; Then unit load changes the common influence that will inevitably receive the two, and it is big that the direction unanimity then shows primary frequency modulation contribution load, otherwise then contribute little.
Primary frequency modulation performance evaluation method and deficiency thereof mainly show at present: 1, do not consider the influence of frequency modulation frequency modulation; Make the distortion of primary frequency modulation performance index; Cover unit primary frequency modulation actual act performance, caused the primary frequency modulation policy optimization to lose specific aim, examination loses justice; 2, adopt the primary frequency modulation action influence of the method filtering frequency modulation frequency modulation of powertrace slope before; Only be applicable to the situation of the necessary steady change of overall process frequency modulation frequency modulation of primary frequency modulation action; The actual conditions that can not adapt to the frequency modulation frequency modulation random variation have bigger limitation.
Summary of the invention
The technical matters that the present invention will solve is; Overcome the shortcoming of prior art; A kind of primary frequency modulation method for quantitatively evaluating of eliminating the frequency modulation frequency modulation influence based on regulation and control system is provided; Realize the objective evaluation of unit primary frequency modulation performance and provide the performance evaluation result, improve the electrical network quality of power supply and operation stability conscientiously.The present invention adopts the data of regulation and control system to analyze, and has proposed to judge and eliminate with the load setting value method of frequency modulation frequency modulation influence, has contained frequency modulation frequency modulation all modes to the primary frequency modulation performance influence, and is good through practical application effect.
The technical solution adopted for the present invention to solve the technical problems is following:
The present invention is a kind of to eliminate the primary frequency modulation method for quantitatively evaluating that frequency modulation frequency modulation influences based on regulation and control system, it is characterized in that: said method adopts genset regulation and control system data to analyze; , eliminates primary frequency modulation the frequency modulation frequency modulation influence when estimating; It comprises the following steps:
Step 1, monitoring genset rotating speed judge whether electrical network effective disturbance takes place;
The duration of setting the dead band surpasses the setting duration and the extreme value in the duration is crossed the rotating speed threshold value of setting when rotating speed is crossed, and judges that then effective disturbance takes place electrical network;
Genset rotating speed after effective disturbance takes place in step 2, monitoring, judges whether the effective disturbance of electrical network finishes;
Effectively the rotating speed readjustment takes place to rise constantly in the stabilization time of setting and judges then that to the dead band this disturbance constantly finishes in disturbance, otherwise be judged to the disturbance concluding time stabilization time of getting setting;
The load setting value is the command value of frequency modulation frequency modulation target load after high load capacity, underload, rate limit; If surpass to set threshold value in disturbance period setting value then judge that frequency modulation frequency modulation participates in regulating; According to the unit load variation of actual measurement and the time delay
of set point change; Get
regulated quantity
of frequency modulation frequency modulation constantly, moment load setting value that
be
in the formula;
Load setting value according to the invention is taken from DCS under coordinated control mode be scattered control system; Under other control mode, taking from DEH is steam turbine digital formula electrohydraulic control system.
Beneficial effect of the present invention is: 1, the method that proposes of the present invention has improved the accuracy that primary frequency modulation performance is estimated, and for net factory and the decision-making of power monitoring department, examination provide technical support, can improve the electrical network quality of power supply and operation stability conscientiously.2, the method for the present invention's proposition directly is used for the field data that unit is regulated control, has reduced the influence of data transmission intermediate link; 3, the present invention proposes the method for judging and eliminate the frequency modulation frequency modulation influence with the load setting value; When judging, set threshold value to reduce small size interference at random; And consider the action delay link that load setting value and load exist between actual value and counted time delay of actual measurement, improved the confidence level judged and the accuracy of regulated quantity.4, the method for the present invention's proposition; Frequency modulation frequency modulation all modes have been contained to the primary frequency modulation performance influence; Applicable to the analysis of frequency modulation performance next time of unit different running control mode, also can be with setting value teletransmission to remote performance analysis platform, application prospect is extensive.
Description of drawings
Fig. 1 is the position view of the said setting value of the embodiment of the invention in the unit Logical Configuration.
Fig. 2 is the said load setting value of the embodiment of the invention, load, primary frequency modulation, frequency modulation frequency modulation and speed curves figure.
Embodiment
1, the present invention relates to a kind of primary frequency modulation method for quantitatively evaluating of eliminating the frequency modulation frequency modulation influence based on regulation and control system; Said method adopts genset regulation and control system data; Monitoring genset rotating speed; Judge after effective disturbance takes place electrical network whether frequency modulation frequency modulation participates in regulating, and analyzes the primary frequency modulation performance of eliminating the frequency modulation frequency modulation influence, judge that performance is whether qualified and deposit the result in data file.The practical implementation step is following:
Step 1, monitoring genset rotating speed judge whether electrical network effective disturbance takes place;
The duration of setting the dead band surpasses the setting duration and the extreme value in the duration is crossed the rotating speed threshold value of setting when rotating speed is crossed, and judges that then effective disturbance takes place electrical network.
Genset rotating speed after effective disturbance takes place in step 2, monitoring, judges whether the effective disturbance of electrical network finishes;
Effectively the rotating speed readjustment takes place to rise constantly in the stabilization time of setting and judges then that to the dead band this disturbance constantly finishes in disturbance, otherwise be judged to the disturbance concluding time stabilization time of getting setting.
The load setting value is the command value of frequency modulation frequency modulation target load after high load capacity, underload, rate limit; If surpass to set threshold value in disturbance period setting value then judge that frequency modulation frequency modulation participates in regulating; According to the unit load variation of actual measurement and the time delay
of set point change; Get
regulated quantity
of frequency modulation frequency modulation constantly, moment load setting value that
be
in the formula.
Primary frequency modulation momentary speed variation, contribution electric weight are estimated in step 4, quantitative test, judge whether performance is qualified, and deposit the result in data file.
Be a representative instance of the present invention below, the technical scheme that the present invention realizes be described further below in conjunction with this accompanying drawing, but the example that the invention is not restricted to provide.
Embodiment
The process that this instance is regulated load decline, frequency modulation frequency modulation load up with rotating speed rising primary frequency modulation describes.
As shown in Figure 1: the load setting value is the command value of frequency modulation frequency modulation target load after high load capacity, underload, rate limit, and the load setting value is taken from DCS under coordinated control mode, under other control mode, takes from DEH.
As shown in Figure 2: curve 0 is a load setting value curve, and curve 1 is the frequency modulation frequency modulation curve, and curve 2 is a realized load curve, and curve 3 is actual primary frequency modulation curve, and curve 4 is a speed curves.
At t
1Rotating speed is crossed and is set the dead band constantly, the duration surpasses the setting duration and the extreme value in the duration is crossed the rotating speed threshold value of setting, judges that then effective disturbance takes place electrical network.
Effectively the rotating speed readjustment takes place to rise constantly in the stabilization time of setting and judges then that to the dead band this disturbance constantly finishes in disturbance, otherwise is judged to the disturbance concluding time stabilization time of getting setting, is designated as t
2
With the prior art analysis: find out that by unit load curve 2 the unit primary frequency modulation responds fast after effective disturbance takes place rotating speed rising electrical network, load descends rapidly but progressively gos up subsequently, at the disturbance t finish time
2Load and initial time t
1Load equate that load changes, momentary speed variation is defective, the contribution electric weight is a curve 2 and the area of load initial value straight line institute compositing area, judges the correct but performance inconsistency lattice of primary frequency modulation action thus.
Methods analyst with the present invention's proposition: after effective disturbance takes place rotating speed rising electrical network; Find out that by load setting value curve 0 set point change surpasses threshold value more greatly in the primary frequency modulation course of action in the disturbance period; Judge frequency modulation frequency modulation participation adjusting; By the inventive method is got
constantly the regulated quantity
of frequency modulation frequency modulation obtain frequency modulation frequency modulation curve 1, with curve 2 and curve 1 each constantly load value subtract each other and obtain primary frequency modulation operation curve 3.Can be found out that by curve 3 big momentary speed variation of load variations is qualified, the contribution electric weight is the area of curve 3 and load initial value straight line institute compositing area, judges that thus the primary frequency modulation action is correct and performance is qualified.
Method contrast to prior art and the present invention's proposition is found: can find out that by curve 2, curve 3 frequency modulation frequency modulation is judged primary frequency modulation and performance indexes is bigger.
The method that the present invention proposes adopts directly to be used for the field data that unit is regulated control, has reduced the influence of data transmission intermediate link.
The present invention proposes the method for judging and eliminate the frequency modulation frequency modulation influence with the load setting value; When judging, set threshold value to reduce small size interference at random; And consider the action delay link that load setting value and load exist between actual value and counted time delay of actual measurement, improved the confidence level judged and the accuracy of regulated quantity correction.
The present invention proposes a kind of primary frequency modulation method for quantitatively evaluating of eliminating the frequency modulation frequency modulation influence based on regulation and control system; Realize the objective evaluation of unit primary frequency modulation performance and provided the performance evaluation result; Can improve the accuracy that primary frequency modulation performance is estimated; For the decision-making of net factory and power monitoring department, examination provide technical support, improve the electrical network quality of power supply and operation stability conscientiously.The present invention adopts the regulation and control system data, has proposed to judge and eliminate with the load setting value method of frequency modulation frequency modulation influence, has contained frequency modulation frequency modulation all modes to the primary frequency modulation performance influence, and is good through practical application effect.
Claims (2)
1. eliminate the primary frequency modulation method for quantitatively evaluating of frequency modulation frequency modulation influence based on regulation and control system, it is characterized in that, said method adopts genset regulation and control system data to analyze; , eliminates primary frequency modulation the frequency modulation frequency modulation influence when estimating; It comprises the following steps:
Step 1, monitoring genset rotating speed judge whether electrical network effective disturbance takes place;
The duration of setting the dead band surpasses the setting duration and the extreme value in the duration is crossed the rotating speed threshold value of setting when rotating speed is crossed, and judges that then effective disturbance takes place electrical network;
Genset rotating speed after effective disturbance takes place in step 2, monitoring, judges whether the effective disturbance of electrical network finishes;
Effectively the rotating speed readjustment takes place to rise constantly in the stabilization time of setting and judges then that to the dead band this disturbance constantly finishes in disturbance, otherwise be judged to the disturbance concluding time stabilization time of getting setting;
Step 3, judge that based on disturbance period load setting value whether frequency modulation frequency modulation participates in regulating, and calculates regulated quantity;
The load setting value is the command value of frequency modulation frequency modulation target load after high load capacity, underload, rate limit; If surpass to set threshold value in disturbance period setting value then judge that frequency modulation frequency modulation participates in regulating; According to the unit load variation of actual measurement and the time delay
of set point change; Get
regulated quantity
of frequency modulation frequency modulation constantly, moment load setting value that
be
in the formula;
Step 4, quantitative test are estimated the primary frequency modulation momentary speed variation, are regulated electric weight, judge whether performance is qualified, and deposit the result in data file.
2. the primary frequency modulation method for quantitatively evaluating based on the influence of regulation and control system elimination frequency modulation frequency modulation according to claim 1, it is characterized in that: the load setting value is taken from DCS under coordinated control mode, under other control mode, takes from DEH.
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103346619A (en) * | 2013-07-19 | 2013-10-09 | 国家电网公司 | Online monitoring and performance assessing method for primary frequency modulation of thermal generator set |
| CN103777556A (en) * | 2014-02-12 | 2014-05-07 | 国家电网公司 | Priority adjusting method and system for primary frequency modulation of unit plant |
| CN103900821A (en) * | 2014-04-22 | 2014-07-02 | 国家电网公司 | Primary frequency modulation function optimization experiment method of generator set |
| CN103954853A (en) * | 2014-01-26 | 2014-07-30 | 云南电力调度控制中心 | Area grid connection cluster primary-frequency-modulation assessment method and system |
| CN106326529A (en) * | 2016-08-09 | 2017-01-11 | 广东电网有限责任公司电力科学研究院 | System and method for assessing contribution electric quantity of primary frequency modulation of hydroelectric generating set |
| CN106327057A (en) * | 2016-08-09 | 2017-01-11 | 广东电网有限责任公司电力科学研究院 | Hydroelectricity generator group primary frequency modulation theoretical motion electricity quantity calculating system and method |
| CN106410857A (en) * | 2016-04-08 | 2017-02-15 | 国网天津市电力公司 | Unit generating set primary frequency modulation function realization method |
| CN106786665A (en) * | 2016-12-14 | 2017-05-31 | 国家电网公司华中分部 | A kind of generating set primary frequency regulation property abnormality Online statistics analysis method |
| CN107202957A (en) * | 2017-06-05 | 2017-09-26 | 广东美的暖通设备有限公司 | Interference identification method, disturbance ecology system and motor |
| CN107725123A (en) * | 2017-08-18 | 2018-02-23 | 中国神华能源股份有限公司 | The control method and device of steam turbine |
| CN108039712A (en) * | 2017-12-05 | 2018-05-15 | 中国神华能源股份有限公司 | Steam turbine primary frequency modulation method and device and storage medium and processor |
| CN109490676A (en) * | 2018-12-27 | 2019-03-19 | 国电南瑞科技股份有限公司 | New energy unit fm capacity on-line monitoring method and system |
| CN110048436A (en) * | 2019-04-30 | 2019-07-23 | 国家能源投资集团有限责任公司 | Power grid frequency modulation control method and device |
| CN112531769A (en) * | 2020-11-20 | 2021-03-19 | 华能国际电力股份有限公司汕头电厂 | Primary frequency modulation control method for thermal power plant |
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Cited By (19)
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|---|---|---|---|---|
| CN103346619A (en) * | 2013-07-19 | 2013-10-09 | 国家电网公司 | Online monitoring and performance assessing method for primary frequency modulation of thermal generator set |
| CN103954853A (en) * | 2014-01-26 | 2014-07-30 | 云南电力调度控制中心 | Area grid connection cluster primary-frequency-modulation assessment method and system |
| CN103777556A (en) * | 2014-02-12 | 2014-05-07 | 国家电网公司 | Priority adjusting method and system for primary frequency modulation of unit plant |
| CN103900821A (en) * | 2014-04-22 | 2014-07-02 | 国家电网公司 | Primary frequency modulation function optimization experiment method of generator set |
| CN106410857A (en) * | 2016-04-08 | 2017-02-15 | 国网天津市电力公司 | Unit generating set primary frequency modulation function realization method |
| CN106326529B (en) * | 2016-08-09 | 2019-10-08 | 广东电网有限责任公司电力科学研究院 | A kind of checking system and method for hydroelectric units primary frequency modulation contributing electricity |
| CN106326529A (en) * | 2016-08-09 | 2017-01-11 | 广东电网有限责任公司电力科学研究院 | System and method for assessing contribution electric quantity of primary frequency modulation of hydroelectric generating set |
| CN106327057A (en) * | 2016-08-09 | 2017-01-11 | 广东电网有限责任公司电力科学研究院 | Hydroelectricity generator group primary frequency modulation theoretical motion electricity quantity calculating system and method |
| CN106786665A (en) * | 2016-12-14 | 2017-05-31 | 国家电网公司华中分部 | A kind of generating set primary frequency regulation property abnormality Online statistics analysis method |
| CN106786665B (en) * | 2016-12-14 | 2019-11-12 | 国家电网公司华中分部 | A kind of generating set primary frequency regulation abnormal performance Online statistics analysis method |
| CN107202957A (en) * | 2017-06-05 | 2017-09-26 | 广东美的暖通设备有限公司 | Interference identification method, disturbance ecology system and motor |
| CN107725123A (en) * | 2017-08-18 | 2018-02-23 | 中国神华能源股份有限公司 | The control method and device of steam turbine |
| CN107725123B (en) * | 2017-08-18 | 2020-07-14 | 中国神华能源股份有限公司 | Method and device for controlling a steam turbine |
| CN108039712A (en) * | 2017-12-05 | 2018-05-15 | 中国神华能源股份有限公司 | Steam turbine primary frequency modulation method and device and storage medium and processor |
| CN108039712B (en) * | 2017-12-05 | 2021-06-22 | 中国神华能源股份有限公司 | Primary frequency modulation method and device for steam turbine, storage medium and processor |
| CN109490676A (en) * | 2018-12-27 | 2019-03-19 | 国电南瑞科技股份有限公司 | New energy unit fm capacity on-line monitoring method and system |
| CN110048436A (en) * | 2019-04-30 | 2019-07-23 | 国家能源投资集团有限责任公司 | Power grid frequency modulation control method and device |
| CN112531769A (en) * | 2020-11-20 | 2021-03-19 | 华能国际电力股份有限公司汕头电厂 | Primary frequency modulation control method for thermal power plant |
| CN112531769B (en) * | 2020-11-20 | 2024-08-27 | 华能国际电力股份有限公司汕头电厂 | Primary frequency modulation control method for thermal power plant |
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