In this paper, the conventional I- and T-type three-level neutral-point-clamped (3L-NPC) inverter for low-voltage renewable energy systems is first investigated. Literature research shows that improves I-type's insulated-gate bipolar transistor (IGBT) + IGBT current paths. However, diode paths are same. The calculation in paper further reveals dominate conduction losses even whole semiconductor losses. Based on aforementioned recognitions, a novel presented as an alternative to be applied...

To achieve the mutual benefits between railway systems and renewable energy systems, a multiport power conditioner (MP-RPC) with access is proposed to realize on-site consumption negative-sequence compensation. Its power-flow management strategy five classic operation modes analyzed for MP-RPC. The key part of MP-RPC three-port isolated dc/dc converters, which can be used isolation transmission. Through small-signal modeling analysis converter, port control feed-forward decoupling applied....

Abstract This paper addresses a two-stage stochastic-robust model for the day-ahead self-scheduling problem of an aggregator considering uncertainties. The aggregator, which integrates power and capacity small-scale prosumers flexible community-owned devices, trades electric energy in (DAM) real-time markets (RTM), reserve deployment (RCM) (RDM). ability providing service is constrained by regulations market rules, including minimum offer/bid size delivery duration. A combination approach...

During the deregulation of retail power market, multiple stakeholders are gradually involved in distribution network to invest distributed resources and participate transactions, bringing great uncertainty grid operations. This paper proposes a novel robust coordination expansion planning method that considers non-network solutions deregulated including closed-loop demand response other controllable strategies. A double-nested game model is constructed simulate bi-directional interaction...

In this study, a novel dynamic paradigm aimed at solving the power flow equations in both solvable and unsolvable region is proposed. The challenging idea to reformulate into set of ordinary differential equations, whose equilibrium points represent problem solutions. Starting from Lyapunov theory, authors demonstrate that system characterised by an exponential asymptotic convergence points. This feature allows us overcome inherent limitations traditional iterative minimisation algorithms...

The burgeoning integration of distributed energy resources (DER) poses new challenges for the economic and safe operation electricity system. current distribution-side policy is largely based on mandatory regulations incentives, rather than design a competitive market mechanism to arouse DERs freely compete in retail market. To address this issue, we proposed transactive attract active participation profit-driven DER retailers deregulated way. Considering limited property market, bi-level...

Harmonics generated from large‐scale grid‐connected photovoltaic plant (GCPV) has the characteristics of high frequency and wide range. So adverse impact distributed parameter high‐voltage cables becomes more significant. Based on an actual GCPV, harmonic output particularities were discussed according to its operating mechanism. Step‐up transformer, reactive power compensation device, capacitance transmission line loads considered, passive multiport network model was established, mechanism...

This paper proposes a novel computing paradigm aimed at solving constrained optimization problems in electric power systems (a.k.a. optimal flow analysis). The insight is to formulate the OPF problem by proper set of ordinary differential equations, whose equilibrium points correspond solutions. Starting from Lyapunov theory, it will be shown that this artificial dynamic system could designed stable with an exponential asymptotic convergence points. important feature allows analyst overcome...

A digital sun sensor is superior to an analog in aspects of resolution, albedo immunity, and integration. The proposed micro-digital (μDSS) autonomous that implemented through a CMOS image sensor, which named active pixel (APS+). μDSS designed specifically for micro-satellite application addresses low power high accuracy. APS+ significantly reduces the consumption by profiling method obtains noise quadruple sampling method. Measurement results show achieves accuracy 0.01° with 21 mW at 10...

Abstract We propose a restoration strategy using microgrids for restoring power supply to critical loads after an extreme event and thereby enhancing the resilience of distribution grid. The limited capacities distributed generators (DGs) within those intermittent energy sources such as wind photovoltaic are considered. An enhanced model network is established maximizing loads. Firstly, importance load quantified by analytic hierarchy process (AHP) microgrid output further improved. In...

Urged by a close future perspective of traffic flow made mix human-driven vehicles and automated (AVs), research has recently focused on studying the characteristics Adaptive Cruise Controls (ACCs), most typical AV.However, in works, ACC system is studied under simplifying unrealistic assumption, or modeled inaccurate.This paper proposes general hierarchical control to model systems with several assumptions based deficiencies above.Moreover, field experiment was conducted, corresponding...

Abstract This paper presents a distributed adaptive signal control and advisory speed coordination method based on shockwave theory, which accommodates diverse traffic conditions. In order to assess efficiency under various scenarios, an innovative evaluation index termed synthetic delay is introduced the analysis of dynamics at intersections. Considering formation dissipation queue, flow fluctuation incoming traffic, it automatically evaluates throughput with distinctive significances. The...

The DC circuit breaker is the core equipment that realizes fault breaking in distribution network, which of great significance for safe and stable operation power grid. This paper designs develops a 375V/5kA solid-state application needs Dongguan AC/DC hybrid network demonstration project. First, topology working principle this solid state are introduced based on engineering requirements. Then, taking into account requirements large current, fast speed low conducting voltage drop, IGCT used...

Drawbacks of traditional "rate return" (ROR) regulation for distribution system operators (DSOs) have given birth to performance based regulations (PBRs), among which are price cap (PC), yardstick competition (YC), and quality (QR). The PC method may be affected by information asymmetries between the regulator DSOs integration YC, a regulatory policy that makes regulated DSO competing with virtual competitor, partly solves this problem. QR also needs considered ensure improvement economics...