ABSTRACT

Local distribution companies (LDC) frequently supply both gas and power. Grid control is becoming increasingly centralized with dispatching tasks performed in a single control room. Consequently, control room staff are now responsible for the supervision and control of the gas, as well as the power networks. This paper addresses a practiceoriented gas control training course for senior power dispatchers. A new training simulation environment provides multiple parallel training sessions. Trainees can be divided into smaller groups. Each group solves the training tasks simultaneously and independently. Simulation models of the LDC's actual gas networks with up to 10,000 pipe segments and more than 100 pressure regulating stations have been set up. A number of tasks had to be solved in order to import, convert and complement the raw data provided by the customers. The training simulator's man-machine interface had to be designed for each customer to provide a look and feel similar to the actual control system. Training scenarios for routine operational situations as well as for emergencies were developed. The paper discusses the experience obtained in more than one year of training courses, including the training simulator environment, network modeling issues, the scenarios trained, and process and operational differences between the control of gas networks and power grids.

INTRODUCTION
Networks of Stadtwerke Düsseldorf

Stadtwerke Düsseldorf AG is the municipal utility of the city of Düsseldorf. Düsseldorf is the capital of North Rhine-Westphalia, Germany's most populous state, and has about 570,000 inhabitants and an area of approx 84 sq mi. As a municipal company, Stadtwerke Düsseldorf operates the gas, drinking water, district heat and power systems in the city as well as power and gas systems for street lighting, two gasfired power plants, a waste incineration plant and three waterworks. Especially in cities and regional supply systems, integrated utilities are the rule rather than the exception in Germany. Companies only supplying a single source of energy (such as gas companies) are normally only found at the transmission system level. Some of the key figures of the Stadtwerke Düsseldorf networks are: Gas: High-pressure: 290 psig, 58 psig, medium-pressure 13 psig, low-pressure 0.6 psig 900 mi total length, approx. 54,100 buildings connected, 7,000 GWh/year sendout (domestic and commercial), 39.4 GWh/d max. day 4,000 - 5,000 GWh/year power plant gas 13 delivery stations, about 270 gas metering and pressure regulating stations Gas family: Enriched low-BTU gas Water: 7 pressure zones 1,080 mi total length, 73,700 buildings connected 1,955 mcf/y sales, 7.513 mcf/d max. District heat: 3 network sections 114 mi total length, 4,950 delivery stations 1.6 GWh/y sales Electric power: High, medium and low voltage 5,800 mi system length, approx. 83,500 buildings connected 4.400 GWh/year sendout; 750 MW peak load Street lighting: About 62,000 electric and 17,000 gas lights

This content is only available via PDF.
You can access this article if you purchase or spend a download.