Personal use is permitted but requires IEEE

Personal use is permitted but requires ieee

This preview shows page 1 - 3 out of 14 pages.

0885-8950 © 2018 IEEE. Personal use is permitted, but republication/redistribution requires IEEE permission. See standards/publications/rights/index.html for more information.
Image of page 1
CHEN et al. : POWER SYSTEM CAPACITY EXPANSION UNDER HIGHER PENETRATION OF RENEWABLES CONSIDERING FLEXIBILITY 6241 operation is also lacking in previous “pathway” or “roadmap” studies for long term development of renewables in China [6], resulting over optimistic scenarios for wind and solar invest- ments. An important advance for the long-term, low-carbon power system planning of China, named as SWITCH-China, is presented in [7]. With increasing penetration of variable renewables, short- term variability should no longer be ignored in long-term capacity expansion models [8]. The need to balance this variability may strongly affect the composition and operation of future power systems, which will consequently influence oper- ational costs, the optimal generation portfolio and compliance with environmental regulations [9]. The full set of flexibility constraints was introduced first in a planning model by iteration between conventional capacity expansion model and the detailed Unit Commitment (UC) model [5], indicating that ignoring flexibility constraints could result in a 24% deviation for installed capacities for different type of units in Irish power systems [10]. Reference [11] employed unit-grouping technique to simplify the mixed integer formulation of the UC model, pointing out importantly that lacking of consideration for flexibility constraints could result in failure in meeting the environmental regulations in ERCOT. But this study only considered the deployment of wind power in a single area. The combination of wind and solar, the geographical distribution of renewable investments in multiple areas have not been addressed with full set of flexibility constraints for China, which happens to be dominant by inflexible coal fired units. Here we investigate the large-scale, long-term transition to- wards higher penetration of variable renewables for the north- western regional power systems of China. The northwestern regional grid covers 5 provinces, with a geographical area sim- ilar to India. It is the most important base for wind and solar investment in China: 43 GW of wind power had been installed by 2016, with an additional 30 GW of solar power, accounting for approximately half of the national total solar installation. We focus on the optimal generation mix and geographical alloca- tion of generation resources for the year of 2035, under different penetration of renewables and low carbon policies. Incorporat- ing NASA meteorological data base, we evaluate the quality and costs of wind and solar resource in this region. Considering the resource availability, variability and costs, the optimal in- vestments decisions are evaluated with detailed considerations of hourly system operation for the full year.
Image of page 2
Image of page 3

You've reached the end of your free preview.

Want to read all 14 pages?

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern

A+ icon
Ask Expert Tutors You can ask You can ask You can ask (will expire )
Answers in as fast as 15 minutes