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dispatchable region for Active Distribution Networks Using Approximate Second-order Cone Relaxation

CSEE Journal of Power and Energy Systems 2023年第6期9卷 1999-2007页

作者： Zhigang Li Wenjing Huang J.H.Zheng Q.H.Wu School of Electric Power Engineering South China University of TechnologyGuangzhou 510640China

Uncertainty in distributed renewable generation threatens the security of power distribution *** concept of dispatchable region is developed to assess the ability of power systems to accommodate renewable generation at a given operating *** DC and linearized AC power flow equations are typically used to model dispatchable regions for transmission systems,these equations are rarely suitable for distribution *** achieve a suitable trade-off between accuracy and efficiency,this paper proposes a dispatchable region formulation for distribution networks using tight convex *** cone relaxation is adopted to reformulate AC power flow equations,which are then approximated by a polyhedron to improve ***,an efficient adaptive constraint generation algorithm is employed to construct the proposed dispatchable *** studies on distribution systems of various scales validate the computational efficiency and accuracy of the proposed method.

关键词： dispatchable region distribution system renewable power generation second-order cone relaxation uncertainty

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Real-time dispatchable region of Renewable Generation Constrained by Reactive Power and Voltage Profiles in AC Power Networks

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CSEE Journal of Power and Energy Systems 2020年第3期6卷 528-536页

作者： Yanqi Liu Zhigang Li Q.H.Wu Haibo Zhang School of Electric Power Engineering South China University of TechnologyGuangzhou 510641China State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power UniversityBeijing 102206China

A large amount of renewable energy generation(REG)has been integrated into power systems,challenging the operational security of power *** a real-time dispatch,system operators need to estimate the ability of the power network to accommodate REG with a limited reserve *** real-time dispatchable region(RTDR)is defined as the largest range of a power injection that the power network can accommodate in a certain dispatch interval for a given dispatch base ***-of-the-art research on the RTDR adopts a DC power flow model regardless of the voltage profiles and reactive power,which can overlook potentially insecure operational states of the *** address this issue,this paper proposes an AC power flow based RTDR model simultaneously considering the reactive power and voltage profiles *** nonlinear constraints in our model are approximated using a linear power flow model together with a polytope approximation technique for quadratic *** adaptive constraint generation algorithm is used to calculate the *** results using the IEEE 5-bus and 30-bus systems illustrate the advantages of the proposed model.

关键词： dispatchable region linearization renewable energy generation reactive power

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Solvability region of AC Power Flow with Volatile Renewable Generation and Operating Constraints

Solvability Region of AC Power Flow with Volatile Renewable ...

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第40届中国控制会议

作者： Qianli Ma Wei Wei Wei Chai Shengwei Mei State Key Laboratory of Power Systems Department of Electrical EngineeringTsinghua University Electric Power Research Institute Shanghai Municipal Electric Power Company

Integration of large-scale renewable energy in the power system helps reduce carbon dioxide emission. However, their volatile nature also challenges the security operation of power systems, which boils down to the feasibility of network constrained power flow under a given nodal injection pattern. This paper studies the solvability of alternating-current（AC） power flow with volatile renewable generation and operating constraints. The set of all admissible injection patterns of renewable power is defined as the dispatchable region, which contains essential and visualizable information on system security. This paper characterizes the dispatchable region through several multi-objective optimization problems;the Pareto frontiers constitute the boundary of the dispatchable region. A ε-constrained method is developed to compute and visualize the dispatchable region. Case studies on the IEEE 9 bus system validate the proposed method.

关键词： dispatchable region renewable generation uncertainty multi-objective optimization Pareto frontier

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