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With the implementation of distributed generations, microgrid has become an important entity in the modern power systems. A grid-connected microgrid can participate in multiple electricity markets with different time scale to procure energy and self-schedule its internal generation resources to serve its demand. In a medium-term operation horizon (weekly, monthly or longer time span), the decision...
Demand Side Management (DSM) will play a large role in creating a pathway to a low carbon future. Microgrids are an ideal test bed for DSM within the Smart Grid (SG) framework, allowing for increased integration of distributed generation (DG), here focused on distributed Renewable Energy Sources (RESs). Existing work uses conservative estimates to model the stochastic nature of RESs, resulting in...
This paper is based on an ongoing project that is evaluating the potential for a microgrid in a city in northwest region of the US. Power for the microgrid will be supplied largely from existing hydroelectric generators and proposed photovoltaic installations. This study focuses on the voltage profiles of all of the buses in the microgrid during different seasons of the year and identifies the ways...
In this paper, a model reference control based inertia emulation strategy is proposed. Desired inertia can be precisely emulated through this control strategy so that guaranteed performance is ensured. A typical frequency response model with parametrical inertia is set to be the reference model. A measurement at a specific location delivers the information of disturbance acting on the diesel-wind...
This paper presents a centralized microgrid control system for effective operation of wind turbines and diesel engines coupled to a flywheel electrical storage component on Saint Paul Island. The wind turbines have sufficient capacity to support the entire island without using the diesel engines, allowing the formation of an islanded power system completely powered by renewables. The proposed strategy...
This paper presents the implementation of a hardware-in-the-loop simulation (HIL) workbench for hybrid AC/DC micro grid. The hybrid AC/DC micro grid integrates both distributed sources and loads in AC/DC systems to respective links directly. For DC system, photovoltaic arrays with boost converter (PVBC), battery with bi-directional DC/DC converter and DC loads are covered. Diesel generator (DGs) and...
This paper aims at developing an economic dispatch optimizer using a Particle Swarm Optimization (PSO) for a microgrid system, that can operate in grid-connected or islanded mode. In grid-connected mode, the optimizer provides set-points for dispatch of real power from Distributed Energy Resources (DERs) in the microgrid and purchase of real power from the bulk grid every 15 minutes. The optimization...
The current distribution systems and power transmission are designed with a power flow characteristic flowing from the source to the load at all times. From the dissemination and use in larger-scale distributed generators, questions arise as to the operation of current protection systems. This article aims to analyze the contribution to the short circuit of a solar generator connected to an urban...
This paper discusses the introduction to Smart Energy Source's (SES) Progressive Resource Energy Park (PREP) and PREP design processes. The PREP application to Central Rural Electric Cooperative's Innovation Pointe campus microgrid. The microgrid consists of solar distributed energy resource (DER), battery energy storage and emergency diesel generation. This microgrid is controlled by a medium voltage...
This work proposes a solution to enable the operation of diesel generators that supply line-frequency phase-controlled rectifiers to charge battery banks in isolated microgrids. The solution consists of the use of resonant filters, tuned to the harmonic frequencies that must be suppressed from the AC source line currents. In addition to the resonant filters, a circuit topology is proposed to attenuate...
This paper proposed a non-cooperative game-theoretic method to study power trading modes and strategies in multi-microgrids system (MS) including controllable distributed generation (DG). Considering the influence of DG on MS trading strategy decisions, a strategic game-theoretic model was put forward under the system trading rules. The effects of the distribution system (DS) on microgrids trading...
This paper investigates the impact of demand response (DR) management on improving the social welfare of remote communities by integrating renewable energy (RE) resources into their diesel generator-based isolated microgrids. A multiple-year planning optimization problem is developed to determine the optimal combination of RE resources and energy storage system (ESS) while considering demand response...
This paper investigates the impact of incorporation of renewable energy (RE) resources on diesel generation carbon footprint reduction in Canada's remote communities. A multiple-year planning optimization problem is adopted to study the feasibility of integration of RE and energy storage system (ESS) in isolated microgrids of remote communities and to verify the economic and environmental benefits...
This paper offers a microgrid (MG) system equipped with a classical proportional-integral (PI) control operating in two conditions, i.e., grid-connected and islanding modes. The proposed microgrid mainly consists of hybrid photovoltaic/wind sources, a synchronous generator, a battery storage and a load. The microgrid is able to provide a power factor correction close to unity in the grid-connected...
In this paper, a smart integrated adaptive centralized controller is proposed for monitoring and controlling integrated renewable energy sources (RESs), both for intentional and unintentional islanding modes of operation for microgrids, as well as, for a variable range of transient load shedding and fault scenarios corresponding to electrical power system outages. It is demonstrated that the proposed...
In this paper, current control for ensuring a stability of battery energy storage system (BESS) is analyzed in a stand-alone microgrid which includes 50kW BESS and 50kW diesel generator. BESS with LCL filter is charged from the diesel generator when state of charge of battery bank is insufficient, and the current control of BESS may become unstable since a large synchronous inductance of diesel generator...
The energy structure is undergoing a very serious change with the connection of renewables from the distribution level. One of these important changes that will ensure the sustainability of energy is the successful implementation of the microgrids. It is very important how the microgrid structure can recover itself from a severe system faults and also how the microgrid structure can maintain the balance...
Power output of wind generators is always associated with some uncertainties due to wind speed and other weather parameters alteration, and precise short-term forecasts are essential for their efficient operation. This can efficiently support transmission and distribution system operators and schedulers to improve the power network control and management. In this paper, we propose a double stage hierarchical...
One of the targets for operational control of DC microgrid is to guarantee the DC bus voltage constant. Considering DC microgrid on both grid-connected and islanding operating conditions, DC bus voltage control strategy was proposed based on ac power grid and energy storage systems. Through the reasonable design of external voltage loop and internal current loop control parameters for the both AC-DC...
Microgrids have become a preferred source of energy for remote locations due to their relative reliability and minimal operational cost. In this work, the optimal operational dispatch of an islanded microgrid consisting of a Combined Heat and Power (CHP) generator and PV generator is considered. The power sources must satisfy the load and heat demand whilst simultaneously minimizing the daily operational...
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