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Primary frequency modulation controller, control method and system of thermal power unit

A thermal power unit and controller technology, applied in the direction of single-network parallel feed arrangement, reducing/preventing power oscillation, etc., can solve problems such as wear and rapid response of DEH control system

Active Publication Date: 2019-07-16
STATE GRID SHAANXI ELECTRIC POWER RES INST +1
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Problems solved by technology

[0004] The purpose of the present invention is to provide a thermal power unit primary frequency modulation controller, control method and system, to solve the problem of thermal power unit’s daily participation in system frequency small disturbance adjustment and rapid response after large frequency disturbance, and at the same time solve the problems caused by frequent adjustment of thermal power unit DEH control system wear problem

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  • Primary frequency modulation controller, control method and system of thermal power unit
  • Primary frequency modulation controller, control method and system of thermal power unit
  • Primary frequency modulation controller, control method and system of thermal power unit

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Embodiment Construction

[0043] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0044] see figure 1 , a thermal power unit primary frequency modulation controller according to an embodiment of the present invention, which is a thermal power unit primary frequency modulation control system superimposed with digital electro-hydraulic fuzzy control, a fuzzy controller is set on the DEH side, and frequency droop control is set on the CCS side; specifically Including: data acquisition, filtering, drooping frequency response controller, fuzzy controller and limiter, etc., and finally output the action value of the DEH side adjustment door of the thermal power unit and the power adjustment command of the CCS unit to realize the frequency modulation control function.

[0045]The unit's primary frequency modulation response time should not be greater than 0.2s, and the active power regulation control error should not exce...

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Abstract

The invention discloses a primary frequency modulation controller, control method and system of a thermal power unit. The primary frequency modulation controller comprises a drooping type frequency response controller and a fuzzy controller; the drooping type frequency response controller is arranged on the coordination control side of the thermal power unit, an input of the drooping type frequency response controller is a system frequency difference value of the thermal power unit, and an output of the drooping type frequency response controller is an active adjusting instruction of the coordination control side of the thermal power unit; the fuzzy controller is arranged on the digital electro-hydraulic side of the thermal power unit, an input of the fuzzy controller is the system frequency difference value of the thermal power unit, and an output of the fuzzy controller is an action quantity of an adjusting valve; and the drooping type frequency response controller and the fuzzy controller are combined to carry out frequency difference response control on the thermal power unit. The problem in that the thermal power unit daily participates in small system frequency disturbance adjustment and quick response after large frequency disturbance can be solved; and the problem of wear caused by frequent adjustment of a DEH control system of the thermal power unit can be solved.

Description

technical field [0001] The invention belongs to the technical field of primary frequency modulation control of thermal power units, and in particular relates to a primary frequency modulation controller, control method and system of thermal power units. Background technique [0002] Disturbance faults in the large power grid will cause large fluctuations in system frequency and small disturbances in system frequency at all times. Existing conventional thermal power units generally realize the primary frequency modulation function of the unit by installing frequency droop control on the coordinated control (CCS) side and digital electro-hydraulic (DEH) side; the DEH side directly operates to adjust the steam turbine valve after receiving the frequency difference signal. The power of the unit responds quickly. After receiving the frequency difference signal, the CCS side sends a power adjustment command to the unit coordination control system to realize the stable adjustment o...

Claims

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Application Information

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IPC IPC(8): H02J3/48H02J3/24
CPCH02J3/24H02J3/48
Inventor 程林任冲彭书涛柯贤波李小腾金吉良张青蕾
Owner STATE GRID SHAANXI ELECTRIC POWER RES INST
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