CN110768288A - Real-time evaluation method for primary frequency modulation speed regulation unequal rate of thermal generator set - Google Patents
Real-time evaluation method for primary frequency modulation speed regulation unequal rate of thermal generator set Download PDFInfo
- Publication number
- CN110768288A CN110768288A CN201910923098.0A CN201910923098A CN110768288A CN 110768288 A CN110768288 A CN 110768288A CN 201910923098 A CN201910923098 A CN 201910923098A CN 110768288 A CN110768288 A CN 110768288A
- Authority
- CN
- China
- Prior art keywords
- rate
- speed
- speed regulation
- primary frequency
- frequency modulation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Measuring Frequencies, Analyzing Spectra (AREA)
Abstract
The invention relates to a method for evaluating primary frequency modulation speed regulation unequal rate of a thermal generator set in real time, which comprises the steps of firstly measuring the generated power and the rotating speed at one moment; then measuring the power generation power and the rotating speed at the next moment; then calculating the rotating speed change rate and the load change rate at two moments; and finally, calculating the unequal rate of speed regulation. The unequal rate of speed regulation obtained by calculation of the invention can directly reflect the primary frequency regulation capability of the unit, and the response time of the unit frequency regulation after primary frequency regulation can be analyzed by calculating the unequal rate of speed regulation in real time. By calculating the unequal rate every second, the participation condition of the unequal rate during the primary frequency modulation action can be calculated, and the load contribution amount can also be calculated.
Description
Technical Field
The invention belongs to the technical field of monitoring of waste heat boilers of gas turbine units, and particularly relates to a real-time evaluation method for primary frequency modulation speed regulation unequal rate of a thermal generator set.
Background
The frequency of the power grid is determined by the generated power and the user load, when the generated power is larger than the user load, the frequency is increased, otherwise, the frequency is reduced. The primary frequency modulation means that once the frequency of the power grid deviates from a standard frequency limit value, a generator set in the power grid automatically controls the increase and decrease of load, so that the frequency of the power grid is maintained stable.
With the gradual expansion of the power grid capacity, it becomes more and more important to improve the frequency response capability when the load of the power grid changes and ensure high-quality power supply. At present, the primary frequency modulation and speed regulation unequal rate evaluation of a thermal power generating set is mainly carried out to obtain the frequency modulation capability of the generating set by developing a primary frequency modulation test, the primary frequency modulation test has a long period, and causes time lag for the subsequent peak-adjusting and frequency-modulating capability evaluation, the frequency modulation of the thermal power generating set participates in power grid examination at present, and the thermal power generating set needs to continuously optimize frequency modulation related parameters in order to reduce the frequency modulation examination of the generating set, so that the peak-adjusting and frequency-. From the two aspects, the original speed regulation unequal rate evaluation method cannot meet the related requirements of the network source coordination technology.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a real-time evaluation method for the primary frequency modulation speed regulation unequal rate of a thermal generator set, which can calculate the obtained speed regulation unequal rate and directly reflect the primary frequency modulation capacity of the set.
The invention adopts the following specific technical scheme:
a real-time evaluation method for primary frequency modulation speed regulation unequal rate of a thermal generator set is characterized by comprising the following steps: the method comprises the following steps:
⑴ measuring the power generation power and the rotating speed at a moment;
⑵ measuring the power generation power and the rotating speed at the next moment;
⑶ calculating the speed change rate and the load change rate at two moments;
⑷ calculating the unequal rate of speed regulation;
⑸ repeat steps ⑴ - ⑷.
In step ⑶, the rotation rate change rate is a ratio of a difference between the rotation rate at the next time and the rotation rate at the previous time to a difference between the next time and the previous time.
The load change rate in step ⑶ is a ratio of a difference between the generated power at the next time and the generated power at the previous time to a difference between the next time and the previous time.
In step ⑷, the speed variation rate is the ratio of the rate of change of the rotational speed to the rate of change of the load multiplied by the rated load divided by the rated rotational speed.
The invention has the advantages and beneficial effects that:
firstly, measuring the generated power and the rotating speed at one moment; then measuring the power generation power and the rotating speed at the next moment; then calculating the rotating speed change rate and the load change rate at two moments; and finally, calculating the unequal rate of speed regulation. The unequal rate of speed regulation obtained by calculation of the invention can directly reflect the primary frequency regulation capability of the unit, and the response time of the unit frequency regulation after primary frequency regulation can be analyzed by calculating the unequal rate of speed regulation in real time. By calculating the unequal rate every second, the participation condition of the unequal rate during the primary frequency modulation action can be calculated, and the load contribution amount can also be calculated.
Drawings
Fig. 1 is a schematic diagram of the present invention.
Detailed Description
The present invention is further described in the following examples, but the technical content described in the examples is illustrative and not restrictive, and the scope of the present invention should not be limited thereby.
A real-time evaluation method for primary frequency modulation speed regulation unequal rate of a thermal generator set is disclosed, as shown in figure 1, the innovation of the invention is as follows: the method comprises the following steps:
⑴ measuring the power generation power and the rotating speed at a moment;
⑵ measuring the power generation power and the rotating speed at the next moment;
⑶ calculating the speed change rate and the load change rate at two moments;
⑷ calculating the unequal rate of speed regulation;
⑸ repeat steps ⑴ - ⑷.
The rotation speed change rate in step ⑶ is the ratio of the difference between the rotation speed at the next moment and the rotation speed at the next moment to the difference between the next moment and the next moment, the load change rate in step ⑶ is the ratio of the difference between the generated power at the next moment and the generated power at the next moment to the difference between the next moment and the next moment, and the speed regulation inequality rate in step ⑷ is the result of dividing the ratio of the rotation speed change rate to the load change rate by the rated load.
The sampling period is second, that is, a numerical value of the unequal rate of speed regulation is obtained by operation every second, the unequal rate of speed regulation is a dimensionless number, and the generation period is second. When the load change rate is zero, the value is 0.001, since it is concerned that the divisor cannot be zero.
Examples
A300 MW power generating set generates 200MW at the timing time t0, rotates at 2998rpm, rotates at 3000rpm and loads at 300MW, generates 210MW at the next time t1 and rotates at 3000rpm, and then calculation can be carried out, wherein the rotating speed change rate is (2998 + 3000) ÷ (t1-t0) — 2rpm/s, the load change rate is (210 + 200) ÷ (t1-t0) ═ 10MW/s, the speed regulation inequality rate is-2 ÷ 10 × 300 ÷ 3000 ÷ 2, the percentage is 2%, and the unit speed inequality rate is-2%.
The original speed regulation unequal rate evaluation method is only an off-line method, and the invention is an on-line method which can calculate the speed regulation unequal rate every second in real time. The off-line method is carried out in a field test and written summary report form, the period is 5 to 7 working days, and the on-line evaluation method can monitor data in real time. The grid source coordination technical specification of the power system requires that a unit must regularly carry out a frequency modulation rechecking test, whether the speed regulation unequal rate accords with the result of the previous test or not is mainly verified, otherwise, a related field test is carried out, and in order to improve the grid source coordination management level, the speed regulation unequal rate is adopted for real-time monitoring, so that the situation that the frequency modulation capability of the unit does not reach the standard can be timely found, and the risk of insufficient frequency modulation capability is reduced to the minimum.
After the unit is monitored in real time by adopting the unequal rate of speed regulation, an alarm value can be set, for example, the alarm value is greater than 3.5% or less than 2% to give an alarm, and an operation and maintenance worker can patrol whether the frequency modulation device is normal or not through a detection means, wherein the alarm value indicates that the current frequency modulation capability of the unit does not reach the standard, so that the risk of insufficient frequency modulation capability is realized, and the related specified requirements are met through technical means or maintenance equipment.
Firstly, measuring the generated power and the rotating speed at one moment; then measuring the power generation power and the rotating speed at the next moment; then calculating the rotating speed change rate and the load change rate at two moments; and finally, calculating the unequal rate of speed regulation. The unequal rate of speed regulation obtained by calculation of the invention can directly reflect the primary frequency regulation capability of the unit, and the response time of the unit frequency regulation after primary frequency regulation can be analyzed by calculating the unequal rate of speed regulation in real time. By calculating the unequal rate every second, the participation condition of the unequal rate during the primary frequency modulation action can be calculated, and the load contribution amount can also be calculated.
Claims (4)
1. A real-time evaluation method for primary frequency modulation speed regulation unequal rate of a thermal generator set is characterized by comprising the following steps: the method comprises the following steps:
⑴ measuring the power generation power and the rotating speed at a moment;
⑵ measuring the power generation power and the rotating speed at the next moment;
⑶ calculating the speed change rate and the load change rate at two moments;
⑷ calculating the unequal rate of speed regulation;
⑸ repeat steps ⑴ - ⑷.
2. The method as claimed in claim 1, wherein the rotation speed variation rate in step ⑶ is a ratio of a difference between a rotation speed at a next time and a rotation speed at a time to a difference between the next time and the time.
3. The method for evaluating the primary frequency modulation speed regulation inequality of a thermal generator set according to claim 1 or 2, wherein the load change rate in step ⑶ is a ratio of a difference between the generated power at the next time and the generated power at one time to a difference between the next time and the one time.
4. The method for real-time evaluation of primary frequency modulation speed regulation inequality of a thermal generator set according to claim 3, wherein the speed regulation inequality rate in step ⑷ is a result of dividing a rated speed by a rated load multiplied by a ratio of a speed change rate to a load change rate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910923098.0A CN110768288A (en) | 2019-09-27 | 2019-09-27 | Real-time evaluation method for primary frequency modulation speed regulation unequal rate of thermal generator set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910923098.0A CN110768288A (en) | 2019-09-27 | 2019-09-27 | Real-time evaluation method for primary frequency modulation speed regulation unequal rate of thermal generator set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110768288A true CN110768288A (en) | 2020-02-07 |
Family
ID=69330480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910923098.0A Pending CN110768288A (en) | 2019-09-27 | 2019-09-27 | Real-time evaluation method for primary frequency modulation speed regulation unequal rate of thermal generator set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110768288A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111650513A (en) * | 2020-05-22 | 2020-09-11 | 国网天津市电力公司电力科学研究院 | Primary frequency modulation static test method for thermal generator set |
Citations (8)
| 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 |
| CN105305468A (en) * | 2015-10-19 | 2016-02-03 | 国家电网公司 | Particle swarm optimization algorithm based thermal generator set primary frequency modulation parameter optimization 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 |
| CN107437812A (en) * | 2017-06-30 | 2017-12-05 | 国网山东省电力公司电力科学研究院 | Primary frequency modulation performance assessment criteria computational methods based on time point integrated treatment |
| CN108512232A (en) * | 2018-04-12 | 2018-09-07 | 国网天津市电力公司电力科学研究院 | A kind of computational methods of Thermal generation unit speed diversity factor |
| CN108879731A (en) * | 2018-07-27 | 2018-11-23 | 国网重庆市电力公司电力科学研究院 | A kind of primary frequency modulation performance index Evaluation Method |
| CN110021942A (en) * | 2019-04-17 | 2019-07-16 | 华能国际电力股份有限公司德州电厂 | A kind of frequency modulation control method based on DCS |
| CN110120675A (en) * | 2019-05-28 | 2019-08-13 | 西安交通大学 | A kind of photo-thermal power generation participates in the device and control system and method for primary frequency regulation of power network |
-
2019
- 2019-09-27 CN CN201910923098.0A patent/CN110768288A/en active Pending
Patent Citations (8)
| 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 |
| CN105305468A (en) * | 2015-10-19 | 2016-02-03 | 国家电网公司 | Particle swarm optimization algorithm based thermal generator set primary frequency modulation parameter optimization 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 |
| CN107437812A (en) * | 2017-06-30 | 2017-12-05 | 国网山东省电力公司电力科学研究院 | Primary frequency modulation performance assessment criteria computational methods based on time point integrated treatment |
| CN108512232A (en) * | 2018-04-12 | 2018-09-07 | 国网天津市电力公司电力科学研究院 | A kind of computational methods of Thermal generation unit speed diversity factor |
| CN108879731A (en) * | 2018-07-27 | 2018-11-23 | 国网重庆市电力公司电力科学研究院 | A kind of primary frequency modulation performance index Evaluation Method |
| CN110021942A (en) * | 2019-04-17 | 2019-07-16 | 华能国际电力股份有限公司德州电厂 | A kind of frequency modulation control method based on DCS |
| CN110120675A (en) * | 2019-05-28 | 2019-08-13 | 西安交通大学 | A kind of photo-thermal power generation participates in the device and control system and method for primary frequency regulation of power network |
Non-Patent Citations (1)
| Title |
|---|
| 张宝: "汽轮机转速不等率对机组一次调频能力的影响" * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111650513A (en) * | 2020-05-22 | 2020-09-11 | 国网天津市电力公司电力科学研究院 | Primary frequency modulation static test method for thermal generator set |
| CN111650513B (en) * | 2020-05-22 | 2024-01-26 | 国网天津市电力公司电力科学研究院 | Primary frequency modulation static test method for thermal generator set |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Shu et al. | Analysis of low frequency oscillation and source location in power systems | |
| CN103543403B (en) | Electric system unit Primary frequency control ability detection method | |
| CN103514281B (en) | A kind of wind energy turbine set Reactive-power control ability automatic analysis system based on WAMS dynamic data | |
| CN103248051B (en) | Method for evaluating grid operation safety risk caused by wind farm power fluctuation | |
| CN105445582A (en) | Interconnection power grid primary frequency modulation responding performance assessment method | |
| CN102915471A (en) | Wind power disturbance online safety precaution method | |
| CN104951900A (en) | Performance evaluation device for excitation regulator and PSS (power system stabilizer) of excitation regulator | |
| CN201274013Y (en) | Economic index real-time monitoring analyzing system for power generation plant | |
| CN101819243B (en) | Area information based quiescent voltage unstability prediction method | |
| CN104158206B (en) | One kind meter and the probabilistic electricity net safety stable control method of wind-powered electricity generation | |
| CN110768288A (en) | Real-time evaluation method for primary frequency modulation speed regulation unequal rate of thermal generator set | |
| CN103580043B (en) | Energy storage charge/discharge control method in wind storage integral system | |
| CN114092027A (en) | Carbon flow master station management system, management method and demand side carbon management system | |
| Miryousefi Aval et al. | A novel method for reliability and risk evaluation of wind energy conversion systems considering wind speed correlation | |
| CN113567739A (en) | Real-time detection method and system for power generation limited state of photovoltaic power station | |
| CN206818334U (en) | It is a kind of that stove coal burning caloricity real-time monitoring system is entered based on DSC | |
| CN108683195A (en) | A kind of method that temperature control load participates in electric system frequency modulation | |
| Morison et al. | 2004 IEEE PES power systems conference & critical requirements for successful on-line security assessment | |
| CN107437812B (en) | Primary frequency modulation assessment index calculation method based on time point comprehensive processing | |
| Oshnoei et al. | Intelligent Coordination of Traditional Power Plants and Inverters Air Conditioners Controlled With Feedback-Corrected MPC in LFC | |
| Zhou et al. | Power system transient stability preventive control based on deep cross network | |
| CN103730892B (en) | It is a kind of to count and the fair electricity net safety stable control method of wind power plant benefit | |
| CN110299729A (en) | A kind of stability assessment method and system of double-fed fan motor unit | |
| Liu et al. | Research and Demonstration Application of On-line monitoring and evaluation technology for primary frequency regulation in Renewable Energy Power Station | |
| CN104574216A (en) | Wind power output characteristic analysis method based on WAMS data |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |