This paper maps the expected and possible adverse consequences for power quality of introducing several smart distribution-grid technologies applications. The material presented in this is result discussions an international CIGRE-CIRED joint working group. following applications are discussed: 1) microgrids; 2) advanced voltage control; 3) feeder reconfiguration; 4) demand-side management. Recommendations given based on mapping.

In this paper, a novel configuration of three-level neutral-point-clamped (NPC) inverter that can integrate solar photovoltaic (PV) with battery storage in grid-connected system is proposed. The strength the proposed topology lies novel, extended unbalance vector modulation technique generate correct ac voltage under unbalanced dc conditions. This paper presents design philosophy and theoretical framework technique. A new control algorithm for also presented order to power delivery between...

As distribution networks become increasingly variable and generation becomes decentralised, voltage standards are becoming more liable to violation. Accordingly, intelligent management strategies required enable compliance without unduly increasing network maintenance or infrastructure costs. The relationship between power voltages, however, is complex, non-linear interdependent, thus difficult conceptualise use for decision-making control purposes.

Microgrid systems located within commercial premises are becoming increasingly popular and their dynamic behavior is still uncharted territory in modern power networks. Improved understanding design operation required for the electricity utility building services sectors. This paper evaluates requirements a microgrid system to facilitate seamless mode transition considering an actual system. A simulation model of proposed established (utilizing DIgSILENT Power Factory) aid development...

Conventional generators in wind-diesel hybrid remote-area power supply (RAPS) systems are likely to be heavily stressed during frequency disturbances due poor response of electronic interfaced wind energy conversion (WECSs). Hence, it is imperative for the WECS provide support excursions. However, existing control strategies slow and will also impose severe mechanical/electromagnetic stress on WECSs. In this paper, PMSG-based explored, an enhanced strategy investigated regulate RAPS system...

This paper proposes a novel modulation technique and new balancing control strategy for single-phase five-level flying-capacitor (FC)-based active-neutral-point-clamped (ANPC) converter. The proposed modulator can the FC voltage to follow requested reference value simultaneously generate required ac output regardless of values dc capacitor voltages By implementing this method, smaller dc-link be used even in applications that could experience ripple or transient voltage. In ANPC converter...

Frequency support from renewable power generators is critical requirement to ensure the frequency stability of remote area supply (RAPS) systems with high penetration generation. However, traditional control strategies and stochastic nature wind resource constrain energy conversion system (WECS) such as permanent magnet synchronous generator (PMSG) participating in regulation. This work proposes integrate hybrid storage including ultracapacitors (UCs) lead-acid batteries (LABs) into a PMSG...

In Australia and many other countries, distribution network service providers (DNSPs) have an obligation to their customers provide electrical power that is reliable of high quality. Failure do so may significant implications ranging from financial penalties theoretically through the loss a license distribute electricity. order ensure reliability quality supply are met, DNSPs engage in monitoring reporting practice. This paper provides overview large long-running power-quality project has...

Voltage unbalance (VU) emission assessment is an integral part in the VU-management process where loads are allocated a portion of absorption capacity power system. The International Electrotechnical Commission Report IEC/TR 61000-3-13:2008 prescribes VU allocation methodology establishing fact that can arise at point common connection (PCC) due to upstream network and load unbalance. Although this case for allocation, approaches post do not exist except cases only contributor PCC. Such...

The rollout of advanced metering infrastructure, distribution automation schemes, and integration generation into networks, along with a raising awareness power quality (PQ), means that there is an increase in the availability system monitoring data. In particular, data for harmonics, whether it voltage or current now available from large number sites diverse range PQ instruments. traditional analysis reporting examines harmonic orders to 50th. This are significantly larger than, example,...

In future low voltage grids, with multiple inverter interfaced sources connected, regulation may become a necessary task. The potential exists for to be deployed regulate the at point of common coupling (PCC) each sources. PCC is attainable by dynamically controlling amount reactive power injected distribution grid individual systems. current research, closed-loop controller proposed solar photovoltaic (PV) system that connected single-phase feeder (with R X ratio greater than 1). plant...

The International Electrotechnical Commission (IEC) Technical Report IEC/TR 61000-3-13:2008 considers voltage-unbalance (VU) emission assessment as a key aspect of the VU management power systems. Compliance unbalanced installations at postconnection stage is essential to ensure that limits set by IEC allocation methodology in preconnection are met. Although known be caused load asymmetries and inherent network asymmetries, locating all sources not straightforward process, especially with...

The increased levels of distributed generator (DG) penetration and the customer demand for high reliability have attributed to formation Microgrid concept. concept contains a variety technical challenges, including load management anti-islanding protection discrimination strategies. This paper provides novel scheme in which loads DG are able detect conditions where island cannot be sufficiently supplied. In these instances, shedding algorithm systematically removes from system until an can...

The quality of the electrical supply has a direct impact on correct function and operation equipment connected to public electricity network. There is an expectation that devices will operate as designed lifetime should, statistically, be close value. reliability network generally assumed high enough so not cause unacceptable issues with regard loss production or functionality. Quantifying cost consumer when power are expected important metric can used business case justify expenditure in...

Due to the increasing number and capacity of grid connected power electronic interfaces associated with distributed generating systems, there is concern on quality problems. Amongst these, high frequency (HF) emissions (referred as Supraharmonics) in range 2-150 kHz has become a topic growing interest within research communities. An increasingly prominent devices which can contribute these HF are photovoltaic (PV) systems. In this paper, from seven small (output ≤ 10kW), grid-tied, inverters...

This paper evaluates the changes in ripple current for an electrolytic capacitor used dc-side of a single-phase rectifier circuit when subjected to input voltage fluctuations. The study has been undertaken order analyse potential impact on lifetime. key effect is that current, as consequence fluctuations, increases dramatically and this phenomenon keeps deteriorating frequency fluctuations increases. Simulations experimental work confirm phenomenon. Since power loss temperature rise are...

Lamp flicker levels that arise as a result of voltage fluctuations can exceed limits set by appropriate standards. New lamp types such compact fluorescent lights are less sensitive to their characteristics considerably different compared those the traditional incandescent lamp. These differences could support moderation present fluctuation and standards hence associated limits. The potential detrimental effects on electrical equipment which may be caused relaxation these should investigated...

In this paper, a complete simulation model of grid-connected single-phase two-stage photovoltaic (PV) system with associated controllers is presented. The developed in PSCAD/EMTDC program. component models the PV include array, dc-dc boost converter, voltage source converter (VSC) and an LCL filter. Components filter, dc-link capacitor VSC inductor are established theoretically that used modelling system. control architecture presented incorporates synchronous reference frame...

Voltage unbalance propagation is an important aspect in relation to the voltage management process which aims maintain acceptable levels power system. The IEC Technical Report IEC/TR 61000‐3‐13:2008 incorporates effects of emission allocation methodology by introducing transfer coefficient, order evaluate influence made background at point evaluation. However, no comprehensive approaches exist literature these coefficients and work follows some approximations, are deduced based on...

This paper gives a status report on activities of CIGRE/CIRED JWG C4.24. The following issues are addressed in the paper: Introduction, scope and terminology; New developments power electronics (PE); Changes probability interference; Microgrids PQ; Volt-VAR control Feeder reconfiguration Demand side management measurement techniques; mitigation.

Renewable energy (RE) resources are non-dispatchable due to their intermittent nature, and battery storage devices (BSDs) play an important role overcome inherent variability. Therefore, for optimal operability, BSDs must be appropriately sized. Historical RE generation data can used sizing, with the objective minimize annualized planning cost. Application of high low pass filters about a given cut-off frequency on spectrum historical data, calculated using discrete Fourier transform...

Voltage dips are considered to be one of the costliest all power quality disturbances due their disruption industrial and commercial operations. The ability characterise voltage dip performance distribution networks has many benefits for industry. There is considerable potential industry make large economic gains if behaviour can better understood planned for. To put strategies in place deal with dips, there a need extensive data collection analysis so that correct planning decisions made....