Is there a grid-connected effect of grid infrastructure on renewable energy generation? Evidence from China's upgrading transmission lines

Abstract

China has built the world's largest power infrastructure. Those upgrading power grid facilities not only contribute to providing enough end-used energy for the world's factories, but also offering a basic guarantee for the clean strategy of Building a Beautiful China proposed by the Chinese government. The national grid system supported by extra-high voltage and ultra-high voltage grids as the backbone makes it possible for a non-dispatchable renewable energy source to be connected to the national grid and transmitted to terminal consumers in load centers. The aim of this paper is to test whether China's advanced power grids have played a positive role in promoting power generation of intermittent renewable energy source. A novel nonlinear estimation named panel smoothing transition regression is introduced to capture heterogeneous effects of grid-connecting renewable energy source across regions. The empirical results show that whereas power grid infrastructure generally enhances power generation of renewable energy source and consumption in energy bases and load centers, the effects change across different voltage levels of power grids. The extra-high voltage power grids show strong support for grid-connecting renewable energy source, while the effect of ultra-high voltage power grids is unexpectedly insignificant. The extra-high voltage power grids have not yet become the backbone of the national grid, which is the main reason for the inadequate grid-connected renewable energy source to the ultra-high voltage power grids, indicating the importance of upgrading the power grid infrastructure.

A systematic review of grid-connected photovoltaic and photovoltaic/thermal systems: Benefits, challenges and mitigation

“…This introduces novel approaches, such as artificial intelligence (AI), efficient use of the internet of things (IoT), integration of electric vehicles (EV), etc. The objective of these innovative strategies is to create better coordination between distributed energy resources (DERs) with distributed system operators (DSOs) 37 , which can effectively cooperate with transmission system operators (TSOs) 38 . In addition, voltage regulation (VR) can also be ensured 39 .…”

6σ Robust Lightweight Design of the GIL/GIS Bus Based on Co‐Simulation of Insulation, Current Flow, and Mechanical Stress

“…With the increasing capacity of transmission and distribution systems, the contradiction between the lightweight and reliability of electrical equipment has become an urgent problem to be solved [1,2]. As an important part of gas-insulated transmission lines (GIL) and gas-insulated switchgear (GIS), the bus is one of the core equipment of the UHV/EHV transmission project, and its lightweight design method remains to be explored [3][4][5].…”

Grid-connected New Energy Generation and its Influence on Power Supply Quality based on Smart Grid

“…However, the above methods are not accurate enough in simulating the correlation between WP output time series and have not taken into account the coupling relationship between WP output and load changes. Reference [4] considers four extreme scenarios that have a significant impact on the peak shaving operation of the PS. After obtaining WP access, the peak shaving limit of the system during low daily load periods is obtained.…”