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A multistage active distribution network (ADN) planning model that is integrated with the application of energy storage system (ESS) is presented in this paper. Both the long-term investment cost and short-term operation conditions of ADN are considered in the proposed model. The power supply reliability improvement brought by ESS is also analyzed. At each planning stage, the operation conditions...
This paper proposes an online clustering modeling method for photovoltaic (PV) power plant considering low voltage ride-through (LVRT) control. The proposed method takes the distance of the unit impulse response curves of the inverter controllers as the clustering index to build the clustering models of the inverter controllers. After all LVRT controllers are simplified and described by an equivalent...
In this paper we propose a linear programing model to determine the optimal size of Phase-Change Energy Storage (PCES) for the planning of Active Distribution System (ADS). The objective function of proposed model consists of the investment and operation cost of ADS, and the constraints consider the operating conditions of ADS and PCES. A case study based on the real peak-valley electricity price...
This paper presents an online clustering modeling method for large-scale photovoltaic (PV) power plants. The proposed method utilizes the defined feature distance of inverter control parameters as the clustering index to derive the equivalent PV plant model. Based on the offline parameter database and the online matching method, the feature distance weighted by online parameter sensitivity is obtained...
A multi-stage Active Distribution Network (ADN) planning model that integrated with the application of Energy Storage System (ESS) is presented in this paper. Both the longterm investment cost and short-term operation conditions of ADN are considered in the proposed model. The benefits of power supply reliability improvement brought by ESS in the ADN are also included. In each planning stage, the...
This paper proposes a security constrained economic dispatch (SCED) method for micro-grid containing wind power. By using wind power forecast data to divide the range of wind power fluctuation into multiple scenes, this method optimizes power output of traditional generation units and their spinning reserve. Besides, the proposed SCED method avoids loadshedding in micro-grid while the wind power is...
This paper presents a simplified photovoltaic array model to describe the photovoltaic system features under partially shaded conditions. Based on the proposed model, the peak power sliding phenomenon of photovoltaic generation is studied during the above mentioned system dynamic process. The paper analyzes the mechanism of the peak power sliding and the critical sliding conditions. Simulation cases...
This paper presents a parameter identification strategy based on the d-q axis decoupling for a typical PV inverter, which contains double loop control model. This strategy can reduce the order of the model and improve the accuracy of the identification. Firstly, a typical PV grid-connected system model is built up, in which the inverter controller is based on the d-q axis decoupling current control...
Establishment of accurate model of photovoltaic power station is the foundation for analyzing the security and stability of the electricity grid and photovoltaic power station. There are still difficulties to identify all the parameters of photovoltaic power stations accuracy. First establish simulation model of grid-connected photovoltaic system. Then analyze the parameters of inverter and filter,...
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