Source-Network-Storage Joint Planning Considering Energy Storage Systems and Wind Power Integration

Xiaosheng Wu,Yuewen Jiang

doi:10.1109/access.2019.2942134

Abstract

With the large-scale grid integration of wind power, the inherent space-time characteristics of wind power and the transmission congestion seriously restrict the consumption of wind power and the development of demand. In order to improve the wind power accommodation and load acceptance level, the joint planning including the wind power installed capacity and location, the transmission network expansion, and energy storage system locating and sizing is considered. The generation-side operation process and the charging-discharging strategy of energy storage systems are also involved. The source-network-storage joint planning model is established with the goal of minimizing the cost of the transmission network expansion, the construction and operation of energy storage systems, the conventional units’ operation, the wind curtailment, and the heavy-load penalty. Furthermore, the energy storage system planning & operation constraints, the heavy-load operation constraints and the quadratic generation cost function are linearized in the MILP model. Through the Wood&Wollenberg 6-bus system, the IEEE RTS-24 test system, and the modified IEEE 118-bus system as the test systems, the joint planning schemes under multiple scenarios are compared and analyzed. The results show that the proposed planning model can effectively improve the load acceptance capability and wind power integration level.

Highlights

With the increasing of demand and the proportion of renewable energy sources (RES) in power grid, especially the wind power [1], [2], the original power source planning and power grid construction are no longer suitable for future development
The construction cost of energy storage systems (ESSs) is represented by the equivalent annual value, and the operation and maintenance (O&M) cost of ESSs is represented according to the O&M ratio
A source-network-storage joint planning model which comprehensively considers TLEC, ECOC, UOC, WCC, and HLPC is established for transmission congestion and wind curtailment in this paper

Summary

INTRODUCTION

With the increasing of demand and the proportion of renewable energy sources (RES) in power grid, especially the wind power [1], [2], the original power source planning and power grid construction are no longer suitable for future development. Based on the above analysis, in this paper, the WPIP including the installed capacity and location of the wind farms, the TNEP, ESSP about ESSs locating and sizing and the power generation-side operation are coordinated considered in the planning stage. According to the comprehensive consideration of economy, safety and wind curtailment at the planning and operation level, a source-network-storage joint planning model with the minimizing goal including transmission line expansion cost(TLEC), ESSs construction and operation cost(ECOC), units operation cost(UOC), wind curtailment cost(WCC), heavy-load penalty cost(HLPC) is proposed. The main contributions of this paper include three aspects: (1) A novel optimization model which coordinated determines WPIP, TNEP, and ESSP is proposed under comprehensive consideration of economy, safety, and wind curtailment to manage transmission congestion and wind curtailment issue.

OBJECTIVE FUNCTION

CONSTRAINTS 1) Power balance constraint of nodes

LINEARIZED CONSTRAINTS

SOLUTION ALGORITHM

Findings

CONCLUSION