A controllable load coordinated frequency control system and method for electric vehicles and water heaters

Abstract

The present disclosure provides a controllable load coordinated frequency control system and method for electric vehicles and water heaters. The control signal is sent to the water heater, and the frequency control signal components that cannot be covered by the water heater are respectively used as the first water heater frequency control signal component and the second water heater frequency. The control signal components are input into the frequency control signal generator; the components that cannot be covered by the frequency control signal generator due to the response speed and frequency control signal capacity are respectively used as the first electric vehicle frequency control signal component and the second electric vehicle frequency The control signal component is input into the electric vehicle, and the frequency control signal component that the electric vehicle cannot cover is input into the energy storage system; this disclosure realizes a new coordinated load frequency control based on the electric vehicle and the water heater, which can effectively suppress large-scale The frequency fluctuation in the grid integrating renewable energy overcomes the problems of frequency fluctuation and distribution voltage mutation in the grid.

Description

technical field [0001] The disclosure relates to the technical field of flexible load coordinated frequency control, in particular to a controllable load coordinated frequency control system and method for electric vehicles and water heaters. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art. [0003] There are problems such as frequency fluctuations and distribution voltage mutations in the power grid, and the use of energy storage systems is one of the effective ways to solve these problems. Due to the high cost of energy storage batteries, the application of replacing part of the energy storage device with the user's electrical equipment through grid demand response control has attracted widespread attention. [0004] A typical example of this application is Vehicle-to-grid (V2G), which includes the concept of charge and discharge control betwee...

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Problems solved by technology

[0005] The inventors of the present disclosure found that although the frequency regulation of electric vehicles or other controllable loads has been studied in the prior art, the problem of how to dispatch LFC signals to the entire power grid has not been solved

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