Distributed Volt-Var Curve Optimization Using a Cellular Computational Network Representation of an Electric Power Distribution System
TL;DR: In this paper , the authors presented a simple, scalable, and robust distributed optimization framework (DOF) for optimizing voltage control in modern electric power distribution systems, which allows data-driven distributed voltage optimization in a power distribution system.
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Abstract: Voltage control in modern electric power distribution systems has become challenging due to the increasing penetration of distributed energy resources (DER). The current state-of-the-art voltage control is based on static/pre-determined DER volt-var curves. Static volt-var curves do not provide sufficient flexibility to address the temporal and spatial aspects of the voltage control problem in a power system with a large number of DER. This paper presents a simple, scalable, and robust distributed optimization framework (DOF) for optimizing voltage control. The proposed framework allows for data-driven distributed voltage optimization in a power distribution system. This method enhances voltage control by optimizing volt-var curve parameters of inverters in a distributed manner based on a cellular computational network (CCN) representation of the power distribution system. The cellular optimization approach enables the system-wide optimization. The cells to be optimized may be prioritized and two methods namely, graph and impact-based methods, are studied. The impact-based method requires extra initial computational efforts but thereafter provides better computational throughput than the graph-based method. The DOF is illustrated on a modified standard distribution test case with several DERs. The results from the test case demonstrate that the DOF based volt-var optimization results in consistently better performance than the state-of-the-art volt-var control.
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Citations
Optimization Problems
Renchang Dai,Guangyi Liu +1 more
- 29 Sep 2023
TL;DR: Optimization theory is essential for decision science and power system operation analysis. Linear and nonlinear programming methods are used to find optimal solutions for various power system optimization problems.
2
Control of reactive power flows by means of distributed generators
L. M. Chetoshnikova,N. I. Smolentsev,A.V. Polyanskaya +2 more
Abstract: Methods. The algorithm used for modeling consists of several stages: first, random variables rk and xk are set, which remain constant at all subsequent stages of modeling. For each case, a random value of loads and generation is set and a system of equations is solved to determine the voltage levels along the line and total losses. Results . The article describes the relevance of the topic, considers the features of the influence of active and reactive power regulation on the steady-state modes of the electrical network. For modes 3 and 4, the entire part of the curve from the extreme left point (corresponding to the best power quality) to the point of reaching the global minimum (when losses are minimal) represents a possible area where a compromise can be found between loss reduction and voltage drop by adjusting K. Comparison of different modes shows that maximum flexibility is achieved in mode 4, when high penetration of renewable energy sources leads to overproduction of electricity. Conclusion . Summarizing the simulation results, it can be said that the reactive power flow control scheme on distributed PV grid inverters is quite simple and effective. Reactive power flows are controlled according to local values of active and reactive power consumption. The scheme contains one generalized adjustable parameter for balancing between local demands in order to minimize the power flow and maintain a good level of power quality.
Situational awareness indices of solar PV power generation under temporal weather conditions for near real-time planning and operation
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Options for Control of Reactive Power by Distributed Photovoltaic Generators
Konstantin Turitsyn,Petr Šulc,Scott Backhaus,Michael Chertkov +3 more
- 16 May 2011
TL;DR: In this article, the authors discuss and compare via simulation various design options for control systems to manage the reactive power generated by these inverters, and find that local control schemes are able to maintain voltage within acceptable bounds.
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Distributed control of reactive power flow in a radial distribution circuit with high photovoltaic penetration
Konstantin Turitsyn,Petr Šulc,Scott Backhaus,Michael Chertkov +3 more
- 25 Jul 2010
TL;DR: It is shown how distributed control of reactive power can serve to regulate voltage and minimize resistive losses in a distribution circuit that includes a significant level of photovoltaic (PV) generation.
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