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Load command dynamic compensation method and system

A technology of load command and dynamic compensation, applied in the direction of control system, control generator, electrical components, etc., can solve the problem of large command deviation, and achieve the effect of improving accuracy, improving AGC performance, and enhancing economic and social benefits.

Active Publication Date: 2015-06-24
NORTH CHINA ELECTRICAL POWER RES INST +1
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  • Claims
  • Application Information

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Problems solved by technology

[0011] For another example, a generator set is under the 600MW load condition, and a 200MW load disturbance test is carried out. After comparing the dispatching side signal LDC1 and the generating side signal LDC2, the steady-state deviation of the unit load command is 4MW. up to 3 seconds

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  • Load command dynamic compensation method and system
  • Load command dynamic compensation method and system
  • Load command dynamic compensation method and system

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Embodiment Construction

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0034] In order to improve the AGC capability of the thermal power generation unit, the present invention provides a load command dynamic compensation method and system, and designs a new control loop to improve the control accuracy and response time of the AGC of the unit. The new AGC control loop responds to the scheduling When the command is activated, it can quickly predict the load change trend in time, shorten the time for the unit to respond to dispatching instructions for actual power generation, and greatly improve the correct rate of unit participation in AGC...

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Abstract

The invention relates to a load command dynamic compensation method and system. The method includes the steps of receiving a target load command LDC2 output by a load command LDC1 after passing through a communication network and remote terminal equipment, and performing differential operation on the LDC2 to generate a command variation; if the absolute value ABS of the command variation changes, receiving the value of the difference between an actual load command LDC3 and the LDC2, wherein the difference value is generated after the LDC2 undergoes rate limitation; performing amplitude limiting on the difference value to generate an amplitude limiting value delta; obtaining the amplitude limiting result of the command variation, and multiplying the amplitude limiting result by the delta to generate a dynamic accuracy compensation value; inputting the dynamic accuracy compensation value into an input end of a power regulator of a CCS control unit to perform dynamic accuracy compensation, and after limiting the amplitude of the dynamic accuracy compensation value, inputting the dynamic accuracy compensation value into an output end of the power regulator to perform fast dynamic compensation.

Description

technical field [0001] The present invention relates to thermal power generation technology, in particular to automatic generation control (Automatic Generation Control AGC) technology of thermal power generating units, and specifically to a load command dynamic compensation method and system. Background technique [0002] AGC technology is one of the important measures to ensure the safe and economical operation of the power grid and improve the operation level of the power grid. The AGC characteristics of the generator set significantly affect the safety and stability of the system, and it is an important content of the grid plant coordination. Under the situation of national networking, in order to improve the quality of power grid AGC operation, ensure the quality of power grid frequency and the control level of inter-grid connection lines, since 2008, various regional electric power supervision bureaus have successively issued the "Implementation Rules for the Management...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P9/04
Inventor 李卫华骆意高爱国杨振勇谢明陈振山
Owner NORTH CHINA ELECTRICAL POWER RES INST