Power-grid frequency modulation control system and method with participation of electric boiler

An electric heating boiler and control system technology, applied in the direction of circuit devices, AC network circuits, reducing/preventing power oscillation, etc., can solve the problems of lack of electric heating boilers, etc., to speed up frequency recovery, reduce capacity requirements, and improve system frequency characteristics Effect

Active Publication Date: 2017-09-05
SOUTHEAST UNIV +5
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Problems solved by technology

[0004] However, there is still a lack of research on the control method of electric boilers participating in power grid frequency regulation.

Method used

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  • Power-grid frequency modulation control system and method with participation of electric boiler
  • Power-grid frequency modulation control system and method with participation of electric boiler
  • Power-grid frequency modulation control system and method with participation of electric boiler

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Embodiment Construction

[0046] In order to describe the present invention more specifically, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0047] In order to effectively participate the electric heating boiler in the frequency stability and control of the power system, the generator-load frequency response model is established by comprehensively considering the three frequency modulation methods of generator primary frequency modulation, conventional load frequency modulation and electric heating boiler frequency modulation.

[0048]The dynamic characteristics of the prime mover and its speed control system need to be considered when the generator side participates in the system frequency, and a corresponding mathematical model needs to be established for this purpose. A typical prime mover system includes a steam turbine speed control module such as figure 1 shown and the turbine module as figure 2 shown. ...

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Abstract

The invention discloses a power-grid frequency modulation control system and method with participation of an electric boiler. The control system comprises an electric boiler dynamic module, a generating system equivalence module and an electric boiler frequency response module; according to a backwater temperature and a heating power sampling value of present time, the electric boiler dynamic module calculates the average water body temperature of the electric boiler of next time, and transmits the average water body temperature to the electric boiler frequency response module; the generating system equivalence module obtains the system frequency fluctuating condition according to the load state as well as a rotor motion equation; and according to the system frequency fluctuating condition, the electric boiler frequency response module determines whether to participate in frequency modulation of the system, calculates the frequency modulation potential of the electric boiler according to the received average water body temperature of the electric boiler of next time, and adjusts the heating power of the boiler according to the frequency modulation potential of the boiler and enables the electric boiler to participate in system frequency modulation control. Thus, the control system changes the load of the electric boiler, adjusts the power rapidly, and keeps a balance between the generating power and the load demand.

Description

technical field [0001] The invention relates to a control method for electric heating boilers to participate in power grid frequency regulation, and belongs to the related field of system frequency control technology on the demand side. Background technique [0002] With the continuous growth of my country's economy, the shortage of power supply is becoming more and more serious. In the operation of the power system, there is often a large gap between the load forecast and the actual operation or the system suffers from an accident, which seriously affects the active power balance of the system. If it is not controlled in time, the frequency will collapse. In the traditional power system, we mainly start from the power supply side and implement "power supply dispatching", that is, the dispatching center can only complete the frequency modulation task by controlling the frequency modulation units such as thermal power, hydropower, and pumped storage. Conventional generation-...

Claims

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Application Information

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IPC IPC(8): H02J3/24
CPCH02J3/24H02J2203/20
Inventor 高山王文党东升朱凌志董振斌王诚良施涛周珏董晓晶周宗川
Owner SOUTHEAST UNIV
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