Control system and method for electrolytic aluminum load participating in power grid frequency modulation
A control method and electrolytic aluminum technology, applied in electrical components, circuit devices, AC network circuits, etc., to achieve excellent dynamic performance and improve dynamic characteristics.
Pending Publication Date: 2021-03-26
YUNNAN POWER GRID
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Problems solved by technology
Although the traditional PID control still has an unshakable purpose in the field of control, when dealing with some nonlinear problems, the traditional PID controller has exposed a relatively large disadvantage, so it is proposed to use the fractional order PID control strategy in the two-region model Instead of traditional PID control
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Embodiment 1
[0076] The control method for the electrolytic aluminum load participating in power grid frequency regulation in this embodiment includes the following steps:
[0077] Step (1) Establishing a load frequency control model of a two-zone reheating steam turbine unit;
[0078] Construct the transfer function model of the reheating steam turbine, as shown in formula (3):
[0079]
[0080] In the formula: K τ is the ratio of the power generated by the steam in the high-pressure cylinder section to the total power of the steam turbine; T τ is the reheater time constant; τ T is the steam chamber time constant and the main inlet steam volume; s is the Laplace transform operator;
[0081] Construct the governor model of the steam turbine, as shown in formula (4):
[0082]
[0083] Where: Tg is the governor time constant.
[0084] Construct the generator-power system model, as shown in formula (5):
[0085]
[0086] In the formula: M is the unit inertia constant; D is the ...
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The invention relates to a control system and method for electrolytic aluminum load participating in power grid frequency modulation. The control method comprises the following steps: establishing a load frequency control model of a two-region reheat turboset; building a fractional order PID controller; realizing the load frequency control of the two-region reheating type turboset based on the fractional order PID controller; based on the two-region model, realizing that electrolytic aluminum load participates in power grid frequency control. According to the method, the advantages of the droop control strategy and the virtual inertia control strategy are considered, the comprehensive control strategy including the droop control strategy and the virtual inertia control strategy is provided, and the defects under the single control strategy are overcome. While the adjustable load of electrolytic aluminum is fully utilized, the frequency deviation of the power grid can be effectively reduced, and the steady-state performance of the power grid is improved. Through effective combination of a fractional order PID controller and electrolytic aluminum load frequency control, the reliability of power grid frequency control and the stability of power system operation are further improved.
Description
technical field [0001] The invention belongs to the field of frequency modulation control of high energy consumption loads, in particular to a control system and method for electrolytic aluminum loads participating in power grid frequency modulation. Background technique [0002] With the continuous development of new energy power generation in the power system, the proportion of traditional thermal power plants has declined, and the frequency regulation capability of coal-fired units is limited. Therefore, when the grid frequency fluctuates sharply, the frequency regulation capabilities of traditional thermal power units are difficult to absorb new energy. Frequency fluctuations caused by grid connection. Therefore, in consideration of the original primary frequency regulation and secondary frequency regulation of the power grid, some high energy-consuming loads with frequency regulation capabilities, such as electrolytic aluminum loads, are incorporated into the power grid...
Claims
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IPC IPC(8): H02J3/24H02J3/48C25C3/16C25C3/20
CPCH02J3/241H02J3/48C25C3/16C25C3/20H02J2203/20
Inventor 沈鑫熊峻谭太洋李玲芳余恒洁骆钊张建伟巴挺杰杨晓华赵毅涛漆辉霞
Owner YUNNAN POWER GRID