Closed loop price signal based market operation within Microgrids

Abstract

SUMMARYWithin a general Microgrid framework, this paper presents a model to simulate closed loop energy and ancillary services markets operated by a Microgrid Central Controller (MGCC) and to investigate the performance of such a market mechanism in managing disturbances both within and outside the Microgrid cell. The proposed approach can be seen as an alternative to a more traditional control approach in which the central operator optimises the dispatch of all generators taking into account their bids and then instructing them to produce their outputs at the specified prices according to merit order and network constraints. In the alternative approach discussed here, this dispatch decision is decentralised to each controllable unit. The central operator only influences the decision taken by each unit via price signals. The main advantage of the approach is to preserve the independency of the local controllers and to decentralise the operation decision, making the system more able to cope with a large number of generating units. The performance of the proposed market mechanism is examined via different case studies that simulate the control actions of MGCC, micro-sources and controllable loads in managing small and large disturbances within and outside the Microgrid cell.

Nonlinear and randomized pricing for distributed management of flexible loads

“…Such centralized approaches however yield co mmunication and computational scalability limitations, as they involve transmission of a large number of comp lex operational parameters to the M GCC and they require the latter to solve an optimization problem with a vast number of decision variables and constraints . Furthermore, they raise privacy concerns by the DER owners who are not generally willing to disclose private informat ion and be directly controlled by external entities [3].…”

“…A day-ahead horizon with hourly resolution is considered for the microgrid management problem. The microgrid contains six micro-generators with quadratic cost functions, the parameters of which are given in [3]. It is assumed that the main grid cannot absorb but can supply power to the microgrid, with the relevant quadratic cost function parameters also given in [3].…”

“…The microgrid contains six micro-generators with quadratic cost functions, the parameters of which are given in [3]. It is assumed that the main grid cannot absorb but can supply power to the microgrid, with the relevant quadratic cost function parameters also given in [3]. Furthermore, the cost function associated with demand curtailment is assumed 10 times higher than the cost function of the most expensive micro -generator.…”

Decentralized Coordination of Microgrids With Flexible Demand and Energy Storage

“…Such centralized approaches, however, yield communication and computational scalability limitations, as well as privacy concerns by the DER owners who are not generally willing to disclose private information [3].…”

The research on coordinated operation and cluster management for multi-microgrids

“…In this opinion, it is urging to study the management methods and cooperation modes of mult i-microgrid system. The operation management and control issues and economic, environmental, and operational effects are researched by [6][7][8][9] and [10][11][12][13][14][15][16] respectively.…”