The role of intelligent systems in delivering the smart grid

The development of "smart" or "intelligent" energy networks has been proposed by both EPRI's IntelliGrid initiative and the European SmartGrids Technology Platform as a key step in meeting our future energy needs. A central challenge in delivering the energy networks of the future is the judicious selection and development of an appropriate set of technologies and techniques which will form "a toolbox of proven technical solutions". This paper considers functionality required to deliver key parts of the Smart Grid vision of future energy networks. The role of intelligent systems in providing these networks with the requisite decision-making functionality is discussed. In addition to that functionality, the paper considers the role of intelligent systems, in particular multi-agent systems, in providing flexible and extensible architectures for deploying intelligence within the Smart Grid. Beyond exploiting intelligent systems as architectural elements of the Smart Grid, with the purpose of meeting a set of engineering requirements, the role of intelligent systems as a tool for understanding what those requirements are in the first instance, is also briefly discussed

Embedded intelligence for electrical network operation and control

Integrating multiple types of intelligent, mulitagent data analysis within a smart grid can pave the way for flexible, extensible, and robust solutions to power network management

Unemployment Insurance and Unemployment: Implications of the Reemployment Bonus Experiments

We translate the results of the three reemployment bonus experiments that were conducted during the 1980s into (a) impacts of a 10-percentage point increase in the Unemployment Insurance (UI) replacement rate on the expected duration of unemployment; and (b) impacts of adding 1 week to the potential duration of UI benefits on the expected duration of unemployment. Our approach is to use an equilibrium search and matching model, calibrated using data from the bonus experiments and secondary sources. The results suggest that a 10-percentage point increase in the UI replacement rate increases the expected duration of unemployment by .3 to 1.1 week (a range consistent with, but only somewhat narrower than, the existing range of estimates), and that adding 1 week to the potential duration of UI benefits increases the expected duration of unemployment by .05 to .2 week (which is toward the low end of existing estimates).unemployment, insurance, bonus, experiments, Davidson, Woodbury

Wage-Rate Subsidies for Dislocated Workers

An array of innovative policies has been suggested to address more effectively the needs of dislocated workers. In this paper, we model and simulate the impacts of a wage-rate subsidy (or salary supplement) program in which a dislocated worker who becomes reemployed would receive a payment equal to one-half the difference between the wage previously earned and the wage currently earned. The simulations are based on a search model that is institutionally rich and that provides estimates of the impacts of a wage subsidy by incorporating empirical results from the reemployment bonus experiments that were conducted in the mid- to late-1980s. The model includes several groups of workers other than dislocated workers and therefore provides estimates of the degree to which these other workers might be crowded out of jobs by the wage subsidy program. The results suggest that a wage-rate subsidy paid for two years after reemployment would shorten the unemployment spells of dislocated workers by nearly 2 weeks, and would increase employment of dislocated workers by about 900 to 1000 per 100,000 in the labor force. But the simulations also raise the possibility that the gains for dislocated workers could come at the expense of other groups of workers; that is, other groups of workers could experience small increases in unemployment duration, and decreases in employment levels that almost fully offset the gains for dislocated workers. Three factors may mitigate these crowding-out results crowding out is widely dispersed over various groups of non-dislocated workers, the structural changes that result in dislocation of some workers (and drive the need for a policy like a wage subsidy) benefit non-dislocated workers, and the crowding-out results are quite sensitive to one of our assumptions. We also compare the wage-rate subsidy program with a reemployment bonus, and show that the two can be structured so as to give identical results.dislocated, displaced, workers, wage, subsidies, Davidson, Woodbury

The Optimal Dole with Risk Aversion, Job Destruction, and Worker Heterogeneity

This paper extends earlier research on optimal unemployment insurance (UI) by developing an equilibrium search model that encompasses simultaneously several theoretical and institutional features that have been treated one-by-one (or not at all) in previous discussions of optimal UI. In particular, the model we develop allows us to determine the optimal potential duration of UI benefits as well as the optimal UI benefit amount; assumes (realistically) that not all workers are eligible for UI benefits; allows examination of various degrees of risk aversion by workers; models labor demand so that the job destruction effects of UI are taken into account; and treats workers as heterogeneous. The model suggests that the current statutory replacement rate of 50 percent provided by most states in the United States is close to optimal, but that the current potential duration of benefits (which is usually 26 weeks) is probably too short. This basic result--that the optimal UI system is characterized by a fairly low replacement rate and a long potential duration-- conflicts with most of the existing literature on optimal UI. We argue, however, that the result is consistent with a large literature on optimal insurance contracts in the presence of moral hazard.unemployment insurance, job destruction, Davidson, Woodbury

Exploiting multi-agent system technology within an autonomous regional active network management system

This paper describes the proposed application of multi-agent system (MAS) technology within AuRA-NMS, an autonomous regional network management system currently being developed in the UK through a partnership between several UK universities, distribution network operators (DNO) and a major equipment manufacturer. The paper begins by describing the challenges facing utilities and why those challenges have led the utilities, a major manufacturer and the UK government to invest in the development of a flexible and extensible active network management system. The requirements the utilities have for a network automation system they wish to deploy on their distribution networks are discussed in detail. With those requirements in mind the rationale behind the use of multi-agent systems (MAS) within AuRA-NMS is presented and the inherent research and design challenges highlighted including: the issues associated with robustness of distributed MAS platforms; the arbitration of different control functions; and the relationship between the ontological requirements of Foundation for Intelligent Physical Agent (FIPA) compliant multi-agent systems, legacy protocols and standards such as IEC 61850 and the common information model (CIM)

Intelligent monitoring of the health and performance of distribution automation

With a move to 'smarter' distribution networks through an increase in distribution automation and active network management, the volume of monitoring data available to engineers also increases. It can be onerous to interpret such data to produce meaningful information about the health and performance of automation and control equipment. Moreover, indicators of incipient failure may have to be tracked over several hours or days. This paper discusses some of the data analysis challenges inherent in assessing the health and performance of distribution automation based on available monitoring data. A rule-based expert system approach is proposed to provide decision support for engineers regarding the condition of these components. Implementation of such a system using a complex event processing system shell, to remove the manual task of tracking alarms over a number of days, is discussed

Indian Ocean Traffic: Introduction

Like the Mediterranean, the Indian Ocean has been a privileged site of cross-cultural contact since ancient times. In this special issue, our contributors track disparate movements of people and ideas around the Indian Ocean region and explore the cultural implications of these contacts and their role in processes that we would come to call transnationalization and globalisation. The nation is a relatively recent phenomenon anywhere on the globe, and in many countries around the Indian Ocean it was a product of colonisation and independence. So the processes of exchange, migration and cultural influence going on there for many centuries were mostly based on the economics of goods and trade routes, rather than on national identity and state policy