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Thermal power generating unit primary frequency modulation optimization control method based on time compensation and device

A thermal power unit, time compensation technology, applied in the direction of electrical program control, program control, comprehensive factory control, etc., can solve the problem that the response amplitude cannot meet the requirements of the assessment standard, and achieve the problem of poor frequency modulation assessment indicators, ensuring safety, The effect of maintaining safe operation

Active Publication Date: 2015-11-11
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +1
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Problems solved by technology

[0005] Due to the rapidity and transient characteristics of primary frequency regulation, its adjustment curve is mainly reflected in the form of sharp pulses on the power plant unit side. At the same time, due to the high sampling accuracy of WAMS data (40ms), the actual frequency, power and other parameter curves contain many Glitch, the scheduling side has carried out filtering processing, so the actual frequency modulation response is affected by the conversion calculation of various systems and the influence of network transmission and other factors, there will inevitably be a certain attenuation, resulting in the response amplitude in the actual assessment not reaching the assessment standard Require

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  • Thermal power generating unit primary frequency modulation optimization control method based on time compensation and device
  • Thermal power generating unit primary frequency modulation optimization control method based on time compensation and device

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Embodiment Construction

[0031] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0032] Such as figure 1 As shown, an optimal control method for primary frequency modulation of thermal power units based on time compensation, including:

[0033] When the absolute value of the unit speed deviation signal Δn is within ±2rpm, the primary frequency regulation dead zone specified by the power grid is not exceeded. At this time, the output of the primary frequency regulation compensation function f(x) required in the power grid-connected operation management regulations is 0 , the load compensation ΔP is 0;

[0034] When the absolute value of the unit speed deviation signal Δn is outside ±2rpm, it exceeds the primary frequency regulation dead zone stipulated by the power grid, and the additional load compensation amount of the system is determined according to the time when Δn exceeds the dead zone limit, and the load compensation amount ΔP is ...

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Abstract

The present invention discloses a thermal power generating unit primary frequency modulation optimization control method based on time compensation and a device. The method comprises the steps that if the absolute value of a unit rotation speed deviation signal delta n does not exceed a primary frequency modulation dead zone range specified by a power grid, a unit normal primary frequency modulation compensation amount delta P1 is 0, and a unit load compensation amount delta P is 0; if the absolute value of a unit rotation speed deviation signal delta n exceeds the primary frequency modulation dead zone range specified by the power grid, the unit normal primary frequency modulation compensation amount delta P1 is determined according to a primary frequency modulation compensation amount function, a unit additional load compensation amount is determined according to the time of the delta n exceeding a dead zone limit value, and the unit load compensation amount delta P is the sum of the unit normal primary frequency modulation compensation amount delta P1 and the unit additional load compensation amount delta P3. The beneficial effects of the present invention are that: the primary frequency modulation requirement of the power grid for a unit can be satisfied effectively, and the frequency modulation and peak modulation demands are satisfied while the situation that the unit does not act mistakenly, does not refuse to act and does not act frequently is guaranteed.

Description

technical field [0001] The invention relates to the field of frequency modulation of thermal power units, in particular to a method and device for optimal control of primary frequency modulation of thermal power units based on time compensation. Background technique [0002] With new energy connected to the grid, load growth and the scale of the grid continue to increase, under the new situation of the interconnection of the UHV grid and the regional grid, the connection between the grids at all levels is becoming increasingly close, and the requirements for coordination and cooperation between the grid and the unit are also increasing. The higher the value, the primary frequency regulation in the network plant coordination function becomes one of the effective means to stabilize the power grid. The primary frequency regulation function of the generator set is an inherent function of the turbogenerator set. It is mainly through adjusting the steam inlet control door of the D...

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Application Information

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IPC IPC(8): G05B19/418
CPCY02P90/02G05B19/4184
Inventor 李军周长来高嵩林波
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY
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