A method for temperature-controlled loads to participate in power system frequency regulation

Abstract

The invention discloses a method for enabling a temperature control load to participate in the frequency regulation of a power system. The method comprises installing a controller in the temperature control load, detecting a system frequency fnow through the controller, and when the controller detects that a system frequency deviation exceeds a limit, according to a steady frequency predicted value fpred, taking different control measures and changing the power demand of the load to cooperate with the active power regulation of a power grid. The method can realize power balance quickly by directly removing the load in the case of a large power shortage, and can adjust the load setting temperature in the case of a small power shortage to gradually restore the rated frequency of the system,does not generate under-regulation and over-regulation, and has high control reliability and a good effect.

Description

technical field [0001] The invention belongs to the technical field of power system safety and stability control, and in particular relates to a method for temperature-controlled loads to participate in power system frequency regulation. Background technique [0002] With the development of the economy, the contradiction between energy shortage and environmental pollution has become increasingly prominent. In order to adapt to the trend of world economic development, our country has also actively made changes. In my country's future planning, the proportion of the installed capacity of coal-fired units with high coal consumption and low energy utilization rate in the total installed capacity will drop significantly; the installed capacity of nuclear power units and non-polluting renewable energy generating units such as wind energy and solar energy The proportion of the total installed capacity will increase significantly. The deterioration of the control performance of the...

AI Technical Summary

Problems solved by technology

The deterioration of the controlled performance of the power supply and the increase in the backup cost of the power generation side have challenged the traditional active power balance control method that relies on the power generation side resources to follow the load

[0003] In the prior art, there are a large number of loads with energy (thermal energy, electric energy, chemical energy, etc.) storage characteristics in the power system, such as air conditioners, refrigerators, water heaters, electric vehicles, etc., short-term cut-off or change of control parameters will not affect the user terminal The use characteristics cause obvious negative effects, and have the potential to actively change the operating state and participate in the active power balance control of the system

[0004] In the prior art, the method of temperature-controlled load to realize frequency modulation is to carry out load distributed control according to the frequency deviation. Although this method can enhance the adjustment effect of system frequency while ensuring the comfort of users, it is easy to cause under-tuning. Over-regulation, and emergency control measures cannot be quickly taken according to the severity of the frequency drop, so the frequency regulation effect of the user-side load cannot be fully utilized

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