Integration of renewable energy in the European power grid: Market mechanism for congestion management

Abstract

With the increased use of wind energy several Transmission System Operators (TSO) have increasing difficulties for congestion forecasting due to the unpredictable nature of the energy source. To maintain the state of the system within acceptable and secure operating conditions, the TSOs require the curtailment of the production of generators to avoid local congestion on the power grid. These actions reduce the revenue of renewable producers and limit the development of green energy. This is because renewable producers with support schemes bear the inherent cost of congestion when they are redispatched. This paper proposes two types of market mechanism that solve the above mentioned problems in case of local congestion. The first mechanism consists in a compensation between renewable producers to limit the amount of redispatched generation in situations when the local congested power grid incorporates only renewable production. If both renewable and conventional productions are connected close to each other, a second mechanism will be used to incentivize competition among power adjustment offers.Index Terms--Congestion management, Market mechanism, Renewable intermittent energy, Wind power generation.

Structural and behavioural evaluation of renewable energy power plants' impacts on transmission network congestion using an analytical approach

“…From the perspective of long-term planning, the congestion management problem is affected by variations in the power flow pattern [1][2][3][4][5][6]. On the other hand, regarding the shortterm operation, increasing uncertainty related to REPPs affects the congestion management problem [7][8][9][10][11]. In [4,5], a method for managing network congestion based on the market mechanism is introduced to increase the share of REPPs in the electrical power generation.…”

“…Another way to increase the share of REPPs is re‐dispatching power plants during congestion while improving network reliability. It must be performed by a supervisor who considers REPPs and GenCos simultaneously [8, 9, 12]. Similarly, [13] presents a new method for rescheduling to improve the impact of wind farms integration on congestion management.…”

Could Europe have more mini hydro sites? A suitability analysis based on continentally harmonized geographical and hydrological data

“…The variability of wind and solar resources creates new challenges in energy regulation: curtailment and the setting up of additional storage capacity are traditional answers to the need of making the increasing RES share available, even if with many shortcomings and economic losses [5,6].…”

Comparative analysis of dynamic line rating models and feasibility to minimise energy losses in wind rich power networks

“…At 80%, the number of overloading cases has been increased with a total of 192 for test 1 and 32 for test 2. It is in light of this point that line [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] was the first to be chosen to implement the DLR. This line has a base case ampacity of 0.5 kA with a resistance of 0.11 Ω/km.…”

“…In number of studies transmission congestion has been identified as the major curtailing factor for wind power generation [6][7] and requires considerable time and investment to develop a new transmission network. The convection cooling of the conductors will be at its highest during times of high wind generation assuming high wind speeds experienced at transmission lines, hence wind cooling effect can be effectively utilised without implementing expensive transmission network upgrade.…”