A demand response strategy formulation method considering the ramp rate limit of thermal power units

A demand response, thermal power generation technology, applied in the direction of single-grid parallel feeding arrangement, etc., can solve problems such as large-scale power imbalance, and achieve the effect of maintaining safety and stability, ensuring active power balance, and ensuring comfort.

Active Publication Date: 2021-02-26
JIANGSU FRONTIER ELECTRIC TECH
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Problems solved by technology

[0005] Aiming at the deficiencies in the prior art, the present invention provides a demand response strategy formulation method considering the limit of thermal power unit climbing rate, and solves the large-scale power imbalance problem that may be caused by the sudden drop of photovoltaic power generation in a power system with high photovoltaic penetration rate

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  • A demand response strategy formulation method considering the ramp rate limit of thermal power units
  • A demand response strategy formulation method considering the ramp rate limit of thermal power units
  • A demand response strategy formulation method considering the ramp rate limit of thermal power units

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Embodiment

[0062]In this embodiment, the actual power grid in a certain area is selected as the research object. There are 10,000 households participating in demand response. Each household has three types of smart loads: air conditioners, water heaters, and electric vehicles. Monte Carlo is used for working set points and related physical parameters. Lofa simulation is generated. Assume that the highest point of the load curve is 240MW and the thermal power unit's ramp rate is limited to 0.6MW / min.

[0063]Using the equivalent slope method, the equivalent slope of the load curve before the demand response is calculated to be 0.738MW / min. The initial demand response strategy is that the smart load responds once, the air conditioner comfort is below 26℃, the water heater comfort is above 50℃, the electric vehicle power is above 90%, the load ratio is 2:2:1, and the equivalent slope S is calculated.load =0.921MW / min. The adjustment of dynamic factors expands the comfort zone to the air conditioner ...

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Abstract

A demand response strategy formulation method considering the thermal power unit ramp rate limit, used in high photovoltaic penetration power system, the method first calculates the equivalent slope of the load curve in a high photovoltaic penetration area grid, and then load curve etc. The efficiency slope is compared with the limit value of the thermal power unit’s ramp rate, and corresponding demand response strategies are proposed according to different comparison results. The strategies include dynamic factor adjustment method and advanced adjustment method. Finally, it is verified that the use of the above demand response strategy can significantly reduce the peak value of the load curve. , and the equivalent slope of the load curve falls below the limit value of the climbing rate of thermal power units, effectively coping with the large-scale power imbalance problem that may be caused by the rapid decline of photovoltaic power generation, which is meaningful for the safe and stable operation of the power system.

Description

Technical field[0001]The invention belongs to the field of new energy consumption, and specifically relates to a demand response strategy formulation method in a high photovoltaic penetration power system that takes into account the limitation of the ramp rate of thermal power units.Background technique[0002]With the popularity of photovoltaic power generation, problems such as its strong volatility and the great influence of weather factors such as day and night, overcast and sunny have gradually become prominent. California, the United States, has abundant solar resources, and photovoltaic power generation has repeatedly set a record of power generation, but it is facing the problem that thermal power units cannot meet the power balance due to the limitation of the ramp rate after the reduction of photovoltaic power. In the high-penetration photovoltaic network, the photovoltaic power generation capacity is high at noon, which is sufficient to meet most of the load demand and redu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/46
CPCH02J3/46
Inventor 唐一铭刘亚南袁超梅睿赵双芝郭昭艺莫菲季洁袁泉王琦
Owner JIANGSU FRONTIER ELECTRIC TECH
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