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A control method for central air-conditioning load response hvdc blocking accident

A central air-conditioning and load response technology, applied in heating and ventilation control systems, applications, heating methods, etc., can solve the problem that central air-conditioning does not consider user comfort, central air-conditioning load modeling is immature, and frequency response models cannot be established, etc. problem, to achieve the effect of convenient frequency response, avoiding secondary power impact, and improving system safety

Active Publication Date: 2020-08-04
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +1
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AI Technical Summary

Problems solved by technology

[0005] 1) The central air-conditioning load modeling in response to HVDC lockout accidents is immature
[0006] 2) At present, the direct removal of the central air conditioner does not consider the user comfort, and the power shock after the power supply is restored may bring new hazards to the system
[0007] 3) Failure to establish a frequency response model after controlling the central air-conditioning load, so that the power grid dispatching center can accurately understand the effect of load response

Method used

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  • A control method for central air-conditioning load response hvdc blocking accident
  • A control method for central air-conditioning load response hvdc blocking accident
  • A control method for central air-conditioning load response hvdc blocking accident

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Embodiment Construction

[0059] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0060] combine Figure 1 to Figure 1 0, figure 1 The basic structure diagram of the central air conditioner is shown. The main engine of the central air conditioner can convert the electric energy into several times the cooling capacity through the refrigerant. The cooling water is in the condenser, and the refrigerant is cooled by the cooling water pump. Pass the cooling capacity of the host to the end user.

[0061] A control method for a central air-conditioning load response HVDC blocking accident, comprising the following steps:

[0062] 1) Real-time collection of measurement information of the central air conditioner, including setting cooling water inlet and outlet temperature, chilled water inlet and outlet temperature, host power, etc.;

[0063] 2) After the HVDC locking accident occurs, the Anwen load shedding master station issues a load s...

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Abstract

The invention discloses a control method of a central air conditioning load response to HVDC locking accident. The control method comprises the following steps that measuring information of an air conditioner is collected in real time, the information comprises setting cooling water entering and exiting temperature, cooling water entering and exiting temperature and central air conditioner main unit power and the like; when the HVDC locking accident occurs, a safe and stable load shedding main station issues load shedding instructions through a communication protocol; a load substation executes the load shedding instructions, the load substation excises the controlled central air conditioning load by the communication protocol; feeder power supply is restored, and the current percentage ofthe air conditioner is controlled to be the same as that before the accident; limitation on the percentage of air conditioning current is lifted; a full time domain simulation model is established; and a dispatching center grasps changes of the system frequency after the load is added to the control through the full time domain simulation model. The control method can quickly respond to the HVDClocking accident. Impact on the central air conditioner is little. Secondary power shocks to the system are avoided. The power grid dispatching center mastering the frequency response after the accident is facilitated.

Description

technical field [0001] The invention relates to a control method for a central air-conditioning load response to a blocking accident of an HVDC transmission line. Background technique [0002] In order to solve the current urgent environmental and energy problems, renewable energy sources such as wind and light are being developed and utilized on a large scale around the world. China has also formulated an energy strategy of "Global Energy Internet" for this purpose. In China, a large number of renewable energy resources are concentrated in the northwest region, while large load centers are distributed in the southeast region. In order to accept more renewable energy, more and more ultra-high voltage direct current (HVDC) transmission projects at home and abroad have been completed or are under construction. China currently has Ningdong-Zhejiang, Northwest Yunnan-Guangdong, Shanxi-Jiangsu, etc. For HVDC lines abroad, there are Northeast India-Agra three-terminal HVDC lines,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24F11/38F24F11/62
CPCF24F11/38F24F11/62
Inventor 刘萌张国辉井雨刚王昕李宽孙运涛李玉敦赵斌超史方芳吕晓平丁月明孙健
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY
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