Abstract
The construction of a cyber physical system in a power grid provides more potential control strategies for the power grid. With the rapid employment of intelligent terminal equipment (e.g., smart meters and intelligent appliances) in the environment of a smart grid, abundant dynamic response information could be introduced to support a secure and stable power system. Combining demand response technology with the traditional under-frequency load shedding (UFLS) scheme, a new UFLS strategy-determining method involving intelligent appliances is put forward to achieve the coordinated control of quick response resources and the traditional control resources. Based on this method, intelligent appliances can be used to meet the regulatory requirements of system operation in advance and prevent significant frequency drop, thereby improving the flexibility and stability of the system. Time-domain simulation verifies the effectiveness of the scheme, which is able to mitigate frequency drop and reduce the amount of load shedding.
Highlights
With the accelerating application and deployment of smart grid technologies, the modern power system is becoming a typical cyber physical system (CPS) [1,2], which is a hybrid autonomous heterogeneous system with deep integration of information with the physical world
In the environment of a smart grid, the increasing employment of smart meters, intelligent appliances, and other intelligent terminal equipment provides abundant dynamic information to secure and stabilize the power grid, thereby enabling the power loads to actively participate in more advanced applications in response to a price signal or an event trigger
For each section, when the frequency drops to the preset intelligent home appliance response threshold fSM, the smart meter compares the absolute value of the real‐time frequency changing rate threshold f SM, the smart meter compares the absolute value of the real-time frequency changing rate
Summary
With the accelerating application and deployment of smart grid technologies, the modern power system is becoming a typical cyber physical system (CPS) [1,2], which is a hybrid autonomous heterogeneous system with deep integration of information with the physical world. Provided a one-step optimal load shedding scheme, with accurate calculation of power imbalance after disturbance and selection of the load combination with the minimum absolute error In this paper, this scheme is selected for comparison purposes because the simulation results in [16] demonstrate that it offers improved performance over other adaptive load shedding strategies. To enable the load side control to participate in stability control, two major issues need to be discussed: the strategy coordinated with the existing load shedding method and the requirements of the supporting communication network. The original contributions of this paper include: (1) the framework of using an intelligent interruptible load to participate in emergency frequency control is studied; (2) the requirements of the supporting communication network are discussed and the control terminal of an intelligent appliance is described; (3) the coordinated scheme of intelligent appliances with UFLS is proposed
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