Navid Haghdadi

• PhD
• Research Assistant at UNSW Sydney

Wind and solar are increasingly cost-competitive as well as environmentally less harmful alternatives to the fossil-fuel generation that dominates most electricity industries. However, their highly variable and somewhat unpredictable output still requires high levels of dispatchable plants to ensure demand can be met at times of low renewables avai...

This study analyses distributed photovoltaic (D-PV) system curtailment and impacts on consumers in response to high network voltages. Novel analytical techniques are applied to a unique real-world operational dataset of over 1,300 D-PV systems in South Australia to identify ‘tripping’. Data-driven methods are valuable due to the diverse range of D-...

Electricity industries in emerging economies face particular challenges in delivering affordable, environmentally sustainable, and secure power given growing demand and limited financial resources. While supply reliability is often poor and emission reductions given lower priority, solar and wind are now amongst our cheapest supply options but high...

It's a sunny spring day in South Australia. A light breeze is cooling the coastal state capital of Adelaide as approximately 260,000 distributed solar photovoltaic systems (D-PVs) on residential and business rooftops generate electricity, setting a new State record for lowest minimum electrical demand for the third time this spring. All looks peace...

The electricity sector has a key role to play in the sustainable energy transition. The falling costs of wind and solar PV have added to both the opportunities yet also challenges of balancing sometimes competing industry objectives of costs, security, and environmental impacts. This paper presents novel techniques for assessing possible future ind...

As distributed photovoltaics (PV) levels increase around the world, it is becoming apparent that the aggregate behavior of many small-scale PV systems during major power system disturbances may pose a significant system security threat if unmanaged. Alternatively, appropriate coordination of these systems might greatly assist in managing such distu...

Australia's National Electricity Market (NEM) is experiencing a rapid transformation toward renewable electricity generation. To ensure energy adequacy, reliability, and security, the possible future electricity generation portfolios should be comprehensively investigated. Over the past few years, the significant decline in the cost of renewable en...

Power Purchase Agreements (PPA) between end-users of electricity and renewable energy generators are of increasing significance in the Australian electricity sector. PPAs, depending on how they are structured, can allow end-users to achieve several objectives, including supporting renewable energy development, meeting corporate emissions reduction...

Some two million distributed PV systems have been installed on rooftops across Australia over the past decade but there is surprisingly little data available about inverter market trends and therefore their potential behaviour and impact on the grid. This paper seeks to remedy this gap with regard to inverter specifications including rated AC power...

Understanding of residential electricity demand has application in efficient building design, network planning and broader policy and regulation, as well as in planning the deployment of energy efficiency technologies and distributed energy resources with potential emissions reduction benefits and societal and household cost savings. Very few studi...

Residential air-conditioner loads are known to be a key driver of summer demand peaks for some electricity industries. Such demand peaks occur infrequently but have potentially severe implications for network and peaking generation plant investment, and hence electricity prices for end users. Detailed assessments of air-conditioner peak demand have...

Understanding of residential electricity demand has application in efficient building design, network planning and broader policy and regulation, as well as in planning the deployment of energy efficiency technologies and distributed energy resources with potential emissions reduction benefits as well societal and household cost savings. Very few s...

CONTEXT This paper reviews some of the on-line teaching innovations undertaken to enhance the student experience in a postgraduate engineering course as student enrolment numbers have soared. The course focuses on emerging challenges in electricity industry planning and economics-challenges that raise numerous open questions and don't yet have agre...

The Australian National Electricity Market (NEM) is undergoing rapid change as utility-scale wind, solar and now battery storage technologies enter the market. The impact of these changes on the operation of the NEM is of interest to a potentially wide range of stakeholders including researchers, market participants, consultants and energy NGOs. De...

Deep Dive Workshop 1: Integrating Large Scale Distributed Solar PV Systems to the Grid 10 th April 2018, International Sustainable Energy Summit, Kuching Sarawak

The largest and most established electricity grid in Indonesia, the Java-Madura-Bali (JAMALI) interconnected system, accounts for around 60% of the country's total electricity demand. Given continuing high demand growth and the slow addition of major generators in recent years, energy users served by the JAMALI grid are experiencing inadequate and...

This document introduces the Tariff Design and Analysis (TDA) tool, developed by Centre for Energy and Environmental Markets (CEEM), at the University of New South Wales with support from the Australian PV Institute (APVI). The TDA project was supported by Energy Consumers Australia. The open source TDA tool aims to assist stakeholders, including c...

There is growing policy and regulatory interest in better aligning electricity tariffs with the cost of providing network services to customers: to provide a better price signal for economically efficient use of the network, and reduce cross subsidies between different customers. Given that network costs are significantly driven by peak capacity re...

Australia has likely the world's highest residential PV system penetration. In this paper, the impact of distributed PV on peak demand at different distribution network zone substations (ZSs) is assessed by upscaling 15 minute PV generation data from 270 distributed PV systems across Sydney, Australia and comparing it with load data from around 138...

Historical generation data from thousands of distributed PV systems in Australia have been used to estimate the average performance of distributed PV in DNSPs’ zone substations (ZS) and the availability of PV during peak demand periods.

This paper presents a study evaluating the impact of distributed PV systems on peak demand in the Australian National Electricity Market (NEM). Thirty minute distributed PV generation is modelled by upscaling the logged outputs of some three thousand PV systems distributed across the NEM to reflect total installed NEM PV capacity year by year. This...

Cities import energy, which in combination with their typically high solar absorption and low moisture availability generates the urban heat island effect (UHI). The UHI, combined with human-induced warming, makes our densely populated cities particularly vulnerable to climate change. We examine the utility of solar photovoltaic (PV) system deploym...

We use the Weather Research and Forecast model and estimate anthropogenic heat (AH) fluxes based on fine-scale energy consumption data for Sydney, Australia, to investigate the effects of urbanization on temperature. We examine both the impact of urban canopy effects (UCE) and AH which in combination causes the urban heat island effect. Sydney's ur...

Distributed PV systems, mostly on household, commercial and industrial rooftops, represent around half of global PV capacity. Their orientation (tilt and azimuth) often depends on the particular rooftop on which they are installed, rather than being designed for optimal performance. Furthermore, data collection, and particularly validation, of thei...

Accurate estimations of distributed PV generation performance have potentially significant planning and operational value. With 5.3 GW of small scale PV installed across Australia, there has been no comprehensive assessment of how well these PV systems are performing compared to expectations. In this paper, the daily energy yield from more than 200...

With growing penetrations of distributed photovoltaic (PV) systems in Australian electricity networks, it is increasingly important for network planners and operators to better understand, predict and hence manage the impact of these systems throughout their networks. Time series estimates of distributed PV generation mapped to different Australian...

The incorporation of distributed PV generation data into power system planning and operation is becoming increasingly important as penetrations of PV systems on Australian distribution networks continue to grow. However, the availability of such data is currently very limited. The APVI Live PV Map (Live Map) provides near real-time distributed PV g...

Due to a combination of significant solar potential, falling global PV prices, and rapidly increasing electricity prices, residential PV systems became cost-effective in Australia by late 2011. As a result, and driven by State and Federal government incentives, more than 25% of household in Queensland and South Australia had a rooftop PV system by...

Performance analyses of Photovoltaic (PV) systems are essential for understanding the yield of PV systems, and the cost, quality and reliability of PV electricity. Such analyses can be used to identify loss mechanisms in PV systems and to improve performance predictions. There are more than 1 million rooftop PV systems already installed in Australi...

The number of small scale grid-connected photovoltaic (PV) systems installed in the low voltage distribution network is increasing in many jurisdictions, and predicting the varying output power of these systems is crucial for better understanding their operational impacts on power systems. Since on-line monitoring of these PV systems is currently s...

In this paper a short term evaluation on the performance of different Photovoltaic (PV) plants in the city of Tehran is presented. The comparisons are made considering various levels of irradiance and air temperature. Three PV technologies are compared in terms of their energy yield. Moreover, a comparison of the same technology but from different...

In this paper a short term evaluation on the performance of different Photovoltaic (PV) plants in the city of Tehran is presented. The comparisons are made considering various levels of irradiance and air temperature. Three PV technologies are compared in terms of their energy yield. Moreover, a comparison of the same technology but from different...

This article focuses on sitting and sizing of PV units aiming at minimizing the total power loss in distribution network. Due to fluctuation in output power of photovoltaic and variable nature of the loads in electricity network, for evaluating power loss and the bus voltages, the grid should be simulated for all days of the year and all hours of t...

This paper deals with decision making for new photovoltaic power plant establishment in Iran's electrical network. Iran Electricity network consists of 16 Regional Electricity Companies. In order to find an appropriate place for Photovoltaic power plant, different aspects of the problem have been evaluated and different relative weights are assigne...

In this paper a new maximum power point tracker (MPPT) for a moving solar module is proposed. In these cases, multiple peaks are introduced in the PV array curves (due to the shadow effect) and it is difficult to find and track the new MPP, in order to extract maximum PV power. Hence, a simple analytical MPPT approach is introduced which is easy to...

The rate of using plugin hybrid electric vehicles (PHEV) will be increased in near future in Iran. In the present article, a comparison between existing electricity pricing method (BR) and time of use (TOU) demand response program was made in order to study whether consumers would be motivated purchasing PHEVs or not. The total monthly electricity...

In order to make comprehensive investigation on feasibility of replacing conventional vehicle with plugin electric vehicle, the electricity grid limitation should be considered. P demand is one of the essential limitations. Moreover, historical data of demand profile could be used in simulation. Instead of considering whole data, some representativ...

The equivalent power of feeder, as one of the inputs of chronological simulation of a power network in presence of a large scale photovoltaic power plant, needs some preprocessing in order to reduce simulation time. The Fuzzy C-means, Gustafson Kessel, K-means and K-medoid methods are applied to find a few numbers of representatives for the equival...

In this paper, an effective approach for estimating the operating temperature of a photovoltaic (PV) module is presented. The developed method is simple and does not need any additional hardware. The proposed approach uses an analytical formula to derive the temperature from the maximum power point (MPP) voltage and current. The effectiveness of th...