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Probability model establishing and value solving method of dispersed modulation strategy of air conditioner load group

A technology of air-conditioning load and probability model, applied in the direction of AC network voltage adjustment, AC network circuit, power network operating system integration, etc.

Inactive Publication Date: 2017-07-21
YANTAI POWER SUPPLY COMPANY OF STATE GRID SHANDONG ELECTRIC POWER +1
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0022] Aiming at the problem of how to adjust the air-conditioning load group when a large power shortage accident occurs in the power system, the present invention provides a probability model establishment and numerical solution method for the decentralized modulation strategy of the air-conditioning load group

Method used

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  • Probability model establishing and value solving method of dispersed modulation strategy of air conditioner load group
  • Probability model establishing and value solving method of dispersed modulation strategy of air conditioner load group
  • Probability model establishing and value solving method of dispersed modulation strategy of air conditioner load group

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Embodiment 1

[0082] The air conditioner load distributed control is based on the physical model of a single air conditioner, and the temperature in the air conditioner room changes periodically between the upper and lower limit temperatures: when the air conditioner is in cooling (heating) mode, it is turned on when the indoor temperature reaches the upper (lower) temperature limit Cooling (heating), stop cooling (heating) when the temperature reaches the lower (upper) limit. The above electrical characteristics of the air conditioner can be described by a first-order differential equation:

[0083]

[0084] In the formula, x is the indoor temperature; x o is the outdoor temperature; K is the thermal conductivity of the room; C is the thermal capacity of the room; P N is the rated power of the air conditioner; s is the operating mode of the air conditioner, and the value is "1" or "-1", indicating that the air conditioner is operating in heating or cooling mode; α is the energy efficie...

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Abstract

The invention belongs to the field of electric power control and particularly relates to a probability model establishing and value solving method of a dispersed modulation strategy of an air conditioner load group. When power vacancy occurs in an electric power system, and the frequency is continuously decreased, a load dispersed control strategy for linearly changing the set temperature of the air conditioners is applied to the air conditioners according to the size of frequency deviation. When the frequency is decreased to the lowest value, the set temperature of the air conditioner will not return back along with the reducing of the frequency deviation, and is kept unchanged at the delta T. When the control time reaches delta tc, the control is finished, and each air conditioner adjust own operation states according to a self-discipline controlled basic mechanism. According to the invention, the dispersed self-discipline control of the air conditioner load cluster response frequency is controlled in a control initial stage; power requirements on the air conditioner cluster response frequency are reduced, power vacancy of the system is filled and amplitude of the frequency reduction is reduced; through the self-discipline control after the control is finished and the air conditioner power returning based on period dividing method, power oscillation and secondary impact can be eliminated, so additional damage to operation of the system can be avoided.

Description

technical field [0001] The invention belongs to the field of electric power control, and in particular relates to a probability model establishment and numerical solution method of a distributed modulation strategy of an air-conditioning load group. Background technique [0002] Increasing the system reserve capacity is an effective method to deal with large power shortage accidents in the power system and prevent the frequency from falling sharply. Affected by factors such as changes in power generation composition, environmental protection pressure, and energy shortages, it is uneconomical to rely solely on the backup system on the power generation side to deal with low-probability and high-risk events, and it is becoming more and more difficult to realize technically. It is extremely difficult to tap the potential of the load side to provide emergency backup. Follow [1-4]. With the development of society, power users have higher requirements on the quality of power suppl...

Claims

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Application Information

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IPC IPC(8): H02J3/14
CPCH02J3/14H02J2203/20H02J2310/14Y02B70/30Y02B70/3225Y04S20/222Y04S20/242Y04S20/244
Inventor 刘杰康凯刘树华刘俊旭宋峰张婷婷曹检德吕卫民季笑庆高义新郭晶邵华强田书然
Owner YANTAI POWER SUPPLY COMPANY OF STATE GRID SHANDONG ELECTRIC POWER
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