Abstract
With the development of distribution network, high elastic distribution system with multiple integration needs more response resources from the user-side to participate in the more flexible distribution network interaction. In the face of emergency or accident, the traditional power grid operating control system often takes part in the response in the form of cutting off the whole line load, which will greatly affect the power consumption of users. In this context, this paper proposes a temperature-controlled load shedding method for high elastic distribution network with real-time response. Taking the temperature-controlled load aggregate as the response resource, the temperature-controlled load control method suitable for system frequency and voltage recovery is analyzed, and the temperature-controlled load dispatching strategy participating in the emergency control of high elastic distribution network is formed. Specifically, according to the energy storage characteristics and service time flexibility of temperature-controlled load, the aggregate response model of temperature-controlled load is established to determine the control mode of temperature-controlled load. Then, a temperature-controlled load disaster reduction method based on the real-time response of high elastic load is proposed to realize the participation of temperature-controlled load in system disaster reduction. Finally, the voltage and frequency recovery characteristics of the system are analyzed in a 10 machine 39 bus system.
Highlights
Relying on the energy Internet, the high elastic power grid will realize the mobilization of massive resources, the full interaction of source network load storage, and the overall improvement of security and efficiency
Most of the response mechanisms are applied to long-term grid operation tasks, while direct load control, which has a greater impact on user comfort, has the scale task of real-time response [4]
With the improvement of automation and response speed, the real-time response of high elastic distribution network enables the user side response resources to participate in more flexible distribution network interaction [5]
Summary
Relying on the energy Internet, the high elastic power grid will realize the mobilization of massive resources, the full interaction of source network load storage, and the overall improvement of security and efficiency. RESPONSE MECHANISM OF TEMPERATURE-CONTROLLED LOAD IN HIGH ELASTIC DISTRIBUTION NETWORK In conventional demand response strategies, the operation of air conditioners, refrigerators, and other equipment containing motors by direct load control methods will exhibit synchronous oscillation characteristics [17]. The user’s frequency regulation capacity is proportional to the real-time voltage phase difference and frequency response parameters of the load, which can be calculated to determine the demand response resources that are more suitable for the system frequency adjustment and achieve the frequency recovery with a smaller load cut. By analyzing the temperature-controlled load control method, it can be found that effective load reduction can be achieved in a short period of time by adjusting the temperature setting of the temperature-controlled load
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