Centralised control of diesel gen-sets for peak shaving and system support

2007 IEEE Power Engineering Society General Meeting

2007

In this paper a digital load relief scheme is presented which, when combined with a variable-gain fuzzy logic control strategy, gives significant improvement in diesel generating set load acceptance performance. Test results are presented demonstrating that a commercially available analogue load adjustment implementation can yield improvement in minimization of engine speed deviation for large real power load applications, however the aggressive nature of this scheme results in poor transient voltage regulatory performance. Further test results show that a digital AVR in conjunction with a digital load relief scheme is capable of providing better transient voltage control resulting in overall superior diesel gen-set load acceptance performance.

Section: Digital Load Reliefmentioning

confidence: 99%

“…Deregulation of electrical utilities has resulted in many customers utilizing their standby diesel gen-sets in a peak lopping mode during peak tariff times in the winter months [1], [2].…”

Section: Introductionmentioning

confidence: 99%

A Digital Load Relief Scheme for a Diesel Generating Set

Chambers

McGowan

2007 IEEE Power Engineering Society General Meeting

2007

“…T RADITIONALLY, the engine speed of a diesel-generating set has been regulated by using a fixed droop mechanical governor or by the use of an analog PID-type control circuit [1]. However, with the deregulation of utility supplies, the owners of diesel generators and renewable energy sources have seen an opportunity to exploit their investments to their full potential [2], [3]. This may be achieved by parallel operation with the electricity supply grid, which generally demands more advanced governor and automatic voltage regulation (AVR) systems to synchronize and operate the generator isochronously with the utility.…”

Section: Index Terms-diesel Engine Digital Governors Distributed Gementioning

confidence: 99%

Integrated Governor Control for a Diesel-Generating Set

McGowan

IEEE Trans. On Energy Conversion

Fox

2006

Self Cite

This paper is concerned with the detailed implementation of real-time fuzzy logic speed control for a standby dieselgenerating set. The implementation platform is that of the Mathworks xPC Target. This rapid prototyping scheme permits the automatic cross-compiling of the nonreal-time Simulink control system model into real-time C code, which is executable on the xPC target PC. The digital governor xPC target hardware consists of a desktop PC with a National Instrument Input/Ouput card and a Softing Controller Area Network Card. The paper details the fuzzy control model and the methods with which to communicate with the engine control module. Tests were conducted on a 50-kVA diesel-generating set. The results show that the fuzzy controller is superior to the variable gain PID-type governor used by the conventional engine control module.

“…However, recent economic and environmental incentives have seen a substantial increase in the use of embedded diesel generators, wind energy and combined heat and power. In Northern Ireland alone, there are over 140 MW of diesel generators for peak-lopping duty (7.5% of peak demand) [1].…”

Section: Introductionmentioning

confidence: 99%

Wireless telecoms for distribution networks based on WiMax

Laverty

IET Conference Publications

O'Raw

et al. 2009

Self Cite

Electrical distribution networks are becoming increasingly complex systems. The addition of embedded generation, sustainable energy projects, demand side participation schemes and smart metering require the system operator to gather an unprecedented level of information in real-time from their network. Current SCADA technologies, such as power-line carrier or slow scan UHF telemetry, have a low throughput (or bandwidth) and would be overwhelmed given the task of providing data service to the volume of devices needing telecoms that are predicted to be installed on the power system in the short to medium term. This paper examines alternative and emerging solutions to providing telecoms access to remote devices, with a focus on IEEE 802.16 "WiMax". WiMax has been gaining momentum over the last few years as a solution in fixed "last mile" environment, providing broadband internet access to rural homes and businesses, as it provides excellent geographic coverage for a reasonable capital investment. CANDIDATE TECHNOLOGIESThere exist numerous means of signalling data over long distances. This section considers the most common used by utilities. Fixed line voice telephone communicationsData communication over fixed voice telephone links rely on modem signalling. This requires that the device initiating communication dial the number of a host and established connection. Depending on the quality of the line, a connection speed of at most 56 kbps can be expected. Latency is of the order of 100s of milliseconds.