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Resilient expansion planning of virtual energy plant with an integrated energy system -- reliability criteria of lines and towers

Sambeet Mishra, Henri Manninen, Qiuwei Wu, Chiara Bordin

Abstract

Virtual power plants, while being virtual, rely on a physical network for operations. The portfolio of the virtual power plants is flexible in facilitating a wide range of resources including the local heat pumps. The power transmission network has the responsibility to ensure the security of supply, reliability of operation, planning, and expansion. The power transmission network and apparatus including lines and towers are also aging with time. Furthermore, the transmission network covers a large geographical area which is expensive to maintain. The objective of this paper is to investigate the effect of power network conditions on power network expansion planning. The condition of the power network is determined by the maintenance cost of lines and a health index and a risk factor associated with the tower. The investigation begins with answering how the inclusion of heat pump impacts the decisions on network interventions. Thereafter, the condition network is factored into the decision-making by better understanding the impact of the network condition on the overall expansion planning. Furthermore, many sensitivity analyses are conducted to evaluate the trade-offs between decision variables such as cost of heat pump, coefficient of performance of heat pump, risk factors, and line and tower costs.

Resilient expansion planning of virtual energy plant with an integrated energy system -- reliability criteria of lines and towers

Abstract

Virtual power plants, while being virtual, rely on a physical network for operations. The portfolio of the virtual power plants is flexible in facilitating a wide range of resources including the local heat pumps. The power transmission network has the responsibility to ensure the security of supply, reliability of operation, planning, and expansion. The power transmission network and apparatus including lines and towers are also aging with time. Furthermore, the transmission network covers a large geographical area which is expensive to maintain. The objective of this paper is to investigate the effect of power network conditions on power network expansion planning. The condition of the power network is determined by the maintenance cost of lines and a health index and a risk factor associated with the tower. The investigation begins with answering how the inclusion of heat pump impacts the decisions on network interventions. Thereafter, the condition network is factored into the decision-making by better understanding the impact of the network condition on the overall expansion planning. Furthermore, many sensitivity analyses are conducted to evaluate the trade-offs between decision variables such as cost of heat pump, coefficient of performance of heat pump, risk factors, and line and tower costs.

Paper Structure

This paper contains 18 sections, 19 equations, 14 figures, 1 table.

Table of Contents

  1. Introduction
  2. Reasoning and challenges
  3. The challenge of heat pump capacity allocation
  4. The challenges of network condition
  5. Objectives and contributions
  6. Methodology
  7. Health of towers and nodes replacement decisions
  8. Handling heat demand
  9. Introducing a risk factor
  10. Experiments and Findings
  11. Structure of the experiments
  12. Map of components and challenges
  13. Network interventions with impact of heat pump
  14. COP test
  15. HP cost vs New line cost
  16. ...and 3 more sections

Figures (14)

  • Figure 1: Power network configuration used for computational experiments
  • Figure 2: Restructuring decisions when heat pump is available
  • Figure 3: Restructuring decisions with various coefficient of performance of heat pump
  • Figure 4: Trend of investment (ic) and operational (oc) costs with descending order of COP of heat pump. With non-dispatchable generation units (ic1, oc1), without non-dispatchable generation unts(ic2, oc2).
  • Figure 5: Analysing the ratio between the cost of heat pump and COP. Network interventions without non-dispatchable generation unit with heat pump COP 1.5
  • ...and 9 more figures