Research on Design Scheme Optimization of Transmission Line Based on Internet Technology

As an important part of the power grid, the rationality and scientificity of the design scheme of transmission line not only relates to the stability and reliability of the whole power grid system, but also plays an important function in the energy loss and efficiency amelioration of the power grid system. Based on this, this paper first analyses the function and characteristics of the transmission line, then studies the meteorological conditions of the transmission line design under the Internet tech, and finally gives the design optimization principles and strategies of the transmission line.

The Decision of an Eco-Friendly Reservoir Operation Scheme Based on a Variable Set

The river ecosystem has the characteristics of the coexistence of clarity and ambiguity. The starting point of eco-friendly reservoir operation is to fully consider the ecological water requirements of the lower reaches of the reservoir, so it also has the characteristics of clarity and vagueness. The fuzzy theory is an excellent tool to realize the quantification of fuzzy concepts. In this paper, the variable set theory (VS) is introduced into the decision-making field of eco-friendly reservoir scheduling scheme optimization. Taking Ertan Hydropower Station as an example, the scheduling scheme optimization is carried out. To verify the effectiveness of the evaluation method, this paper compares and analyzes the evaluation results of the fuzzy set evaluation method and the composite fuzzy matter-element method. The results show that the variable fuzzy set method has the advantages of rigorous theory, a concise model, and simple calculation, and the decision result is reasonable and reliable. This research can provide new ideas for the decision-making research of engineering.

A Novel Optimization Method for a Multi-Year Planning Scheme of an Active Distribution Network in a Large Planning Zone

Electric power distribution networks plays a significant role in providing continuous electrical energy to different categories of customers. In the context of the present advancements, future load expansion in the active distribution networks (ADNs) poses the key challenge of planning to be derived as a multi-stage optimization task, including the optimal expansion planning scheme optimization (EPSO). The planning scheme optimization is a multi-attribute decision-making issue with high complexity and solving difficulty, especially when it involves a large-scale planning zone. This paper proposes a novel approach of a multi-year planning scheme for the effective solution of the EPSO problem in large planning zones. The proposed approach comprises three key parts, where the first part covers two essential aspects, i.e., (i) suggesting a project condition set that considers the elements directly related to a group of specific conditions and requirements (collectively referred to as conditions) to ADN planning projects; and (ii) Developing a condition scoring system to evaluate planning projects. The second part of our proposed scheme is a quantization method of correlativity among projects based on two new concepts: contribution index (CI) and dependence index (DI). Finally, considering the multi-year rolling optimization, a detailed mathematical model of condition evaluation and spatiotemporal optimization sequencing of ADN planning projects is developed, where the evaluation and optimization are updated annually. The proposed model has been successfully validated on a practical distribution network located in Xiantao, China. The investigated case study and comparisons verify the various advantages, suitability, and effectiveness of the proposed planning scheme, consequently saving more than 10% of the investment compared with the existing implemented scheme.

The Technical Scheme Optimization of Nuclear Vessel Hydrostatic Test

Nuclear vessel hydrostatic test is an important means of sealing and pressure resistance, because the nuclear vessel hydrostatic test involves important system and key equipment, how to optimize the nuclear vessel hydraulic test is a worthy topic. This paper discusses how to optimize nuclear vessel hydrostatic test technology, mainly from three aspects to optimize, such as the optimization of working ticket logic, the optimization of vessel hydrostatic test implementation, and the optimization of hydrostatic test equipment. Optimization of hydrostatic test scheme provides significance reference for plant maintenance.