基于图形神经网络的电网子网分区的研究
Hongjun Wang1,2, Yanli Zou1,2, Tingli Qin1
1Guangxi Key Laboratory of Brain-inspired Computing and Intelligent Chips, School of Electronic and Information Engineering, Guangxi Normal University, Guilin, Guangxi 541004, China.
Chaos (Woodbury, N.Y.)
|April 10, 2025
概括
本研究介绍了一种新的图形神经网络方法,用于电网社区细分,平衡网络拓和电力流. 这种方法确保每个部门都有可靠的发电,改善了电网管理.
科学领域:
- 电气工程 电气工程
- 网络科学 网络科学
- 计算科学 计算科学
背景情况:
- 由于规模,电力系统可靠性分析越来越复杂.
- 社区结构对于电网研究至关重要,但目前的方法忽视了权力平衡.
- 现有的细分方法需要对独立子网络进行重大运营调整.
研究的目的:
- 为电力网络提出一个改进的社区细分方法.
- 将网络拓与电力平衡考虑结合起来.
- 提高分段电网的运营可行性.
主要方法:
- 使用图形神经网络 (GNN) 来进行社区细分.
- 结合节点的特征,如度,中间和功率值.
- 用生成器节点作为集群中心优化K-means算法.
主要成果:
- 拟议的基于GNN的方法有效地对电力网络进行细分.
- 这种方法确保了每个社区的电力平衡和发电机的存在.
- 在IEEE测试系统上的实验验证证明了卓越的性能.
结论:
- 综合方法提供了更强大的电网细分.
- 这种方法促进了独立子网的更高效,更可靠的运行.
- 基于GNN的战略促进了电力系统社区分析和管理.
相关概念视频
01:26The Power Flow Problem and Solution
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Power flow problem analysis is fundamental for determining real and reactive power flows in network components, such as transmission lines, transformers, and loads. The power system's single-line diagram provides data on the bus, transmission line, and transformer. Each bus k in the system is characterized by four key variables: voltage magnitude Vk, phase angle δk, real power Pk, and reactive power Qk. Two of these four variables are inputs, while the...
143
01:21Power System Three-Phase Short Circuits
67
Determining the subtransient fault current in a power system involves representing transformers by their leakage reactances, transmission lines by their equivalent series reactances, and synchronous machines as constant voltage sources behind their subtransient reactances. In this analysis, certain elements are excluded, such as winding resistances, series resistances, shunt admittances, delta-Y phase shifts, armature resistance, saturation, saliency, non-rotating impedance loads, and small...
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01:28Primary Distribution
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Primary distribution systems deliver electrical power from substations to consumers through various voltage classes, with 15-kV class voltages being predominant among U.S. utilities. Older 2.5- and 5-kV classes are being replaced by 15-kV primaries, while higher 25- to 34.5-kV classes are used in high-density urban areas and rural regions with long feeders. Three-phase, four-wire multigrounded systems are widely employed for balanced power delivery, using the neutral wire as a grounding point.
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01:24Fast Decoupled and DC Powerflow
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The fast decoupled power flow method addresses contingencies in power system operations, such as generator outages or transmission line failures. This method provides quick power flow solutions, essential for real-time system adjustments. Fast decoupled power flow algorithms simplify the Jacobian matrix by neglecting certain elements, leading to two sets of decoupled equations:
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01:24Bus Impedance Matrix
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Calculating subtransient fault currents for three-phase faults in an N-bus power system involves using the positive-sequence network. When a three-phase short circuit occurs at a specific bus, the analysis uses the superposition method to evaluate two separate circuits.
In the first circuit, all machine voltage sources are short-circuited, leaving only the prefault voltage source at the fault location. The positive-sequence bus impedance matrix can be determined by solving the nodal equations,...
In the first circuit, all machine voltage sources are short-circuited, leaving only the prefault voltage source at the fault location. The positive-sequence bus impedance matrix can be determined by solving the nodal equations,...
90
01:23Maximum Power Flow and Line Loadability
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The maximum power flow for lossy transmission lines is derived using ABCD parameters in phasor form. These parameters create a matrix relationship between the sending-end and receiving-end voltages and currents, allowing the determination of the receiving-end current. This relationship facilitates calculating the complex power delivered to the receiving end, from which real and reactive power components are derived.
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