A Spatial–Temporal model (STM) was developed to evaluate the impact of large scale deployment plug-in electric vehicles (EVs) on urban distribution networks. The STM runs based integration power system analysis and transportation analysis. Origin–Destination (OD) from intelligent research used EV mobility. Based technical market information provided by EU MERGE project output OD analysis, a Monte Carlo simulation method within obtain charging load each busbar over time. aims facilitate...

In this paper, a day-ahead market-clearing model for smart distribution systems is proposed. Various types of distributed energy resources (DERs), such as storage, generators, microgrids, and load aggregators, can bid into the distribution-level electricity market. Considering system Volt/VAR control, network reconfiguration, interactions with wholesale market, an optimization built to clear through which locational marginal pricing (DLMPs) both active power reactive are determined. Through...

The increasing penetration of distributed generators (DGs) exacerbates the risk voltage violations in active distribution networks (ADNs). conventional regulation devices limited by physical constraints are difficult to meet requirement real-time and VAR control (VVC) with high precision when DGs fluctuate frequently. However, soft open point (SOP), a flexible power electronic device, can be used as continuous reactive source realize fast regulation. Considering cooperation SOP multiple...

Based on the decentralized sliding mode control, a load frequency controller is designed in this paper for multi-area interconnected power systems with matching and unmatched uncertainties. The proportional integral switching surface constructed each area to improve system dynamic performance reaching intervals. robust proposed by law method assure that fluctuation converges zero after operation point variation. A three-area studied illustrate effectiveness of control scheme.

Soft Open Points (SOPs) are power electronic devices installed in place of normally-open points electrical distribution networks. They able to provide active flow control, reactive compensation and voltage regulation under normal network operating conditions, as well fast fault isolation supply restoration abnormal conditions. A steady state analysis framework was developed quantify the operational benefits a with SOPs generic injection model used determine optimal SOP operation using an...

Soft Open Points (SOPs) are power electronic devices installed in place of normally-open points electrical distribution networks. They able to provide active flow control, reactive compensation and voltage regulation under normal network operating conditions, as well fast fault isolation supply restoration abnormal conditions. Two control modes were developed for the operation an SOP, using back-to-back voltage-source converters (VSCs). A mode with current provides independent real power. a...

Distributed generators including photovoltaic (PV) panels have been integrated dramatically in active distribution networks (ADNs). Due to the strong volatility and uncertainty, high penetration of PV generation immensely exacerbates conditions voltage violation ADNs. However, emerging flexible interconnection technology based on soft open points (SOPs) provides increased controllability flexibility system operation. For fully exploiting regulation ability SOPs address problems caused by PV,...

DC-bus voltage control is an important task in the operation of a dc or hybrid ac/dc microgrid system. To improve dc-bus dynamics, traditional approaches attempt to measure and feedforward load source power scheme. However, system with distributed sources loads, feedforward-based methods need remote measurement communications. In this paper, nonlinear disturbance observer (NDO) based proposed, which does not enables "plug-and-play" feature. Based on observer, novel scheme developed suppress...

This paper proposes a method for coordinated sizing of energy storage (ES) and diesel generators in an isolated microgrid based on discrete Fourier transform (DFT). ES have different response characteristics can complementarily compensate the generation-demand imbalance at time scales. The DFT-based dispatch strategy allocates balance power between two components through frequency-time domain transform. proposed ensures that work their respective most efficient, fit way. Diesel consecutively...

In order to solve the voltage violation problem caused by high penetration of photovoltaic (PV) units in distribution power networks, this paper proposes a double-layer control strategy based on network partition. By optimizing active and reactive outputs PV units, minimization objective curtailment loss can be achieved. basis community detection algorithm, novel cluster performance index electrical distance regional regulation capability is presented partition into several clusters. The...

This paper presents a demand response (DR) and battery storage coordination algorithm for providing microgrid tie-line smoothing services. A modified coordinating control strategy is implemented through two-way communication networks to manage distributed heat pumps in the (connect main grid) power fluctuations. total of 1000 residential electric system are modeled demonstrate effectiveness robustness proposed algorithm. The impact outdoor temperature changes customer room preferences...

The asymmetric integration of distributed generators (DGs) exacerbates the three-phase unbalanced condition in distribution systems. serious operation causes inefficient utilization network assets and security risks system. Soft open point (SOP) is a flexible power electronic device which can achieve accurate active reactive flow control to balance among phases. This paper proposes an SOPs-based strategy for networks. By regulating SOPs, reduce losses simultaneously mitigate unbalance...

This paper presents a novel interleaved high-conversion-ratio bidirectional DC-DC converter based on switched capacitors and coupled inductors. Series-connected capacitor inductor cells were used to increase the voltage conversion ratio, reduce stresses power switches, realize soft-charging/discharging of capacitors, achieve autocurrent-sharing in parallel The structure combined with was adopted current ripple at side having lower voltage, thus enabling applications that require high levels....

This paper focuses on the stability analysis and damping performance improvement of dc microgrids. The small-signal model a microgrid has been derived. Eigenvalue results reveal relationship between system different factors microgrids, including types load, droop coefficient, line parameters, etc. It shows that poorly damped LC circuits in microgrids reduce bring high frequency oscillations. To improve performance, frequency-dependent virtual impedance approach is proposed, which can...

To achieve economic and environmental benefit for the stand‐alone microgrid consisting of diesel generators, wind turbine photovoltaic generation system lead‐acid batteries, a multi‐objective stochastic optimal planning method chance‐constrained programming model are presented. In model, objective is to simultaneously minimise total net present cost carbon dioxide emission in life cycle; type capacity distributed units have been selected as variables; loss adopted probability index...

A novel frequency control method based on double sliding mode (SM) controllers is proposed for isolated micro-grids with renewable sources. In the presented technique, SM pitch angle controller designed wind turbine generator (WTG) system to smooth power output. The load (LFC) constructed diesel restore normal through secondary regulation. Then adaptive LFC redesigned by taking advantage of disturbance observer and law improve dynamic performance system. strategy tested in a typical hybrid...

An observer-based dc voltage droop and current feed-forward control for a microgrid has been proposed in this paper. With the scheme, dynamic response of can be improved effectively through using an observer. Moreover, feedback are both obtained from observer without additional measurement. Furthermore, system stability analysis shows that, propose method enhanced robustness when compared to traditional under variations parameters, such as loads, cable impedances, gains. In controlled...