A double-layer control system for fast frequency adjustment based on temperature control load

Abstract

The invention relates to a thermostatically controlled load-based quick frequency adjustment dual-layer control system connected with a power grid dispatch server. The quick frequency adjustment dual-layer control system comprises a virtual AGC unit, load polymerization servers and thermostatically controlled load modules, wherein the virtual AGC unit is used for reporting the overall adjustment capacity for the power grid dispatch server and generating cluster control instructions by responding to dispatch instructions issued by the power grid dispatch server at the first period; the load polymerization servers are used for responding to the cluster control instructions in sequence by taking the first period as the interval to generate thermostatically controlled load control signals; thethermostatically controlled load modules are responding to the thermostatically controlled load control signals to realize quick adjustment; the virtual AGC unit coordinates the multiple load polymerization servers to realize upper layer control; and the load polymerization servers perform lower layer control on the thermostatically controlled load modules based on the second period. Compared with the prior art, the AGC response performance of the ACL clusters can be improved, and response speed and precision can be improved.

Description

technical field [0001] The invention relates to power grid control technology, in particular to a double-layer control system for rapid frequency adjustment based on temperature-controlled loads. Background technique [0002] As the proportion of random renewable energy such as wind power and photovoltaics in the power grid continues to increase, the climbing rate and high-frequency fluctuation components of the net load of the power system will continue to increase. In this context, only relying on conventional AGC units to ensure the frequency quality of the system will have the following problems. First of all, sufficient AGC reserve capacity needs to be reserved in the system, which reduces the operating efficiency of the system, and frequent adjustments also aggravate the loss of the AGC unit; secondly, the response time of the conventional AGC unit is tens of seconds, and it is difficult to quickly track high-frequency fluctuations. The scarcity of rapid response res...

AI Technical Summary

Problems solved by technology

Although existing studies have verified the ability of TCL clusters to track AGC signals, showing their great potential in participating in AGC, however, considering the characteristics of small monomer capacity, large number and scattered locations of TCL, the existing research still exists as follows Questions: (1) Considering the feasibility, the current control period for the TCL cluster is generally 1min

This makes it impossible for the TCL cluster to track the fast AGC signal (the period is generally 4s), and its response speed is not even as good as that of the conventional AGC unit

Although some research results use fast TCL cluster control with a period of 4s in the simulation, this will generate high communication and control costs in practice

(2) In the existing published literature, some control methods require the user to provide the TCL and building models and parameters to the control center

In addition to bringing about user privacy issues, considering the scale of TCL, it will also generate high implementation costs

(3) Although there are methods that do not require TCL model information, this method generally adopts a centralized control structure and direct load control means, which has information security risks and has high requirements for real-time communication

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