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Online monitoring and performance assessing method for primary frequency modulation of thermal generator set

A thermal power generation unit and unit technology, applied in the direction of measuring electricity, measuring devices, electrical components, etc., can solve the problems of incompleteness, inaccurate dynamic adjustment performance of primary frequency modulation, etc.

Inactive Publication Date: 2013-10-09
STATE GRID CORP OF CHINA +1
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AI Technical Summary

Problems solved by technology

[0004] The present invention aims to overcome the inaccurate and incomplete problem of evaluating the dynamic adjustment performance of primary frequency modulation of single and multiple units in the prior art, and proposes a method for on-line monitoring and performance assessment of primary frequency modulation of thermal power generating units

Method used

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  • Online monitoring and performance assessing method for primary frequency modulation of thermal generator set
  • Online monitoring and performance assessing method for primary frequency modulation of thermal generator set
  • Online monitoring and performance assessing method for primary frequency modulation of thermal generator set

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Embodiment Construction

[0064] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0065] figure 1 In , scan and compare point by point from 0 o’clock, when the time window moves to the AB interval, the frequency change satisfies the large disturbance criterion. From point B the frequency continues to drop to point C where the maximum frequency deviation is reached, and then the frequency deviation drops slightly to the frequency stable point D and tends to be stable. The area between AD is the frequency modulation response interval for large disturbances.

[0066] figure 2 Among them, an on-line monitoring and performance assessment method for primary frequency modulation of a thermal power generating set, including the following steps:

[0067] (1) Collect on-site data of the PMU sub-station of the power plant through the PMU master station, including: unit bus frequency and active power;

[0068] (2) Determine the adjustment up...

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Abstract

The invention discloses an online monitoring and performance assessing method for primary frequency modulation of a thermal generator set. The method divides grid frequency changes into invalid disturbance, valid disturbance, large frequency disturbance and small frequency disturbance, wherein the large frequency disturbance and the small frequency disturbance are contained in the valid disturbance. Specific performance indexes of response time, stabilization time, diversity factors of set rotating speed and the like of the primary frequency modulation of the set are quantitatively assessed, the contributed electric quantity and the correct operation rate of the primary frequency modulation under the small disturbance of the set and the diversity factors of the set rotating speed under the large disturbance of the set can be effectively calculated, and an assessing method for the performance of the primary frequency modulation of the set is further provided. The online monitoring and performance assessing method for the primary frequency modulation of the thermal generator set has the advantages that calculation and monitoring can be carried out on the operation performance of the primary frequency modulation of the set in a long period of time, the comprehensive index of the primary frequency modulation of the set is further calculated, an assessing method is quantified, and the performance of the primary frequency modulation of sets in a network can be comprehensively learned by province professionals.

Description

technical field [0001] The invention relates to an on-line monitoring and performance assessment method for primary frequency modulation of a thermal power generating set. Background technique [0002] With the advancement of power technology, the installed capacity of unit units is increasing, and higher requirements are placed on the automatic control and fault handling capabilities of units. At the same time, the impact and impact of unit unit failures on the power grid are also increasing. With the increase of load and the increase of grid scale, especially in the new situation of interconnection between UHV grid and regional grid, the requirements for power supply quality of grid are getting higher and higher. At present, electric energy has become an indispensable energy source in our daily life. Frequency is an important index to evaluate the quality of electric energy. It reflects the balance between the active power of power generation and the electric load. Theref...

Claims

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Application Information

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IPC IPC(8): H02J13/00G01R31/00G06Q50/06
Inventor 李克雷
Owner STATE GRID CORP OF CHINA
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