Showing papers on "Diesel generator published in 1983"

Review of wind/diesel strategies

Abstract: A large potential demand exists for electricity in areas isolated from grid supply. Diesel generation in these usually remote areas is expensive and wind/diesel systems, with the wind turbine viewed primarily as a fuel saver, can be seen as attractive. Integration of wind energy is not straightforward, and in particular can cause operational problems for the diesel generator set. These difficulties are discussed and various approaches, including a twin diesel system, are presented. The role of energy storage is examined, both to deal with operational problems and to improve wind-energy utilisation. An example of battery storage is developed in some detail. A summary of acturla installations and their performace is included to highlight some of the problems and indicate the approaches being taken to deal with them.

Reliability of emergency ac power systems at nuclear power plants

Abstract: Reliability of emergency onsite ac power systems at nuclear power plants has been questioned within the Nuclear Regulatory Commission (NRC) because of the number of diesel generator failures reported by nuclear plant licensees and the reactor core damage that could result from diesel failure during an emergency. This report contains the results of a reliability analysis of the onsite ac power system, and it uses the results of a separate analysis of offsite power systems to calculate the expected frequency of station blackout. Included is a design and operating experience review. Eighteen plants representative of typical onsite ac power systems and ten generic designs were selected to be modeled by fault trees. Operating experience data were collected from the NRC files and from nuclear plant licensee responses to a questionnaire sent out for this project.

Hybrid Power Systems for Remote Sites - Solar, Wind and Mini Diesel

Abstract: This paper describes a hybrid power supply system for remote sites, ERICSSON SUNWIND, consisting of solar, wind and mini diesel generators. As the system uses both solar and wind generators the particular advantages of this combination are discussed. A highly reliable wind generator of vertical axis type will be described. It is virtually maintenancefree and equipped with unique lightning and overspeed protections. Also it is equipped with a microprocessor-based control system for output power optimization, which will be described in another paper presented at this INTELEC Conference. The system includes two reserve energy sources, i.e. the station battery and the mini diesel generator set. The minidiesel which uses DC-generation will be described together with its control equipment. Its most important characteristics are the simple auxiliary system and the start up safety.

Controller for generator engine or the like

Abstract: PURPOSE:To reduce the variation in the rotating speed when a load is applied by predicting the load amount from the start command signal of the load and applying the load amount as a preceding signal to a fuel amount control system. CONSTITUTION:An addition and subtraction unit 07 outputs a deviation signal between the rotating signal 06 of a Diesel generator and a rotating speed set signal 01, a rotating speed control arithmetic unit 08 calculates in PID the deviation signal by a proportional arithmetic unit 010, an integrating arithmetic unit 011 and a differentiating arithmetic unit 012, and then outputs the first control signal 11 for controlling the fuel amount of the generator. On the other hand, an arithmetic logic circuit 2 predicts the load amount in response to the start command signal from the start command signal group 1, and outputs the second control signal 12 on the basis of the predicted load amount. The first and second control signals 11, 12 are added by an addition and subtraction unit 3 and supplied to an actuator 09 for controlling the fuel amount injected form a fuel injection pump 05.

Triple Hybrid Primary Power Supply System

Abstract: Recently, various hybrid systems are proposed as primary power supplies for communications. First, hybrid conceptions are put in order. Then experiment results of the triple hybrid primary power supply system combining a wind turbine, a solar battery and a diesel generator are stated. Next, a design method for required battery capacity in various systems is given. Applying this method, the complementary grade of wind and sunshine is quantitatively observed, and it is shown that the triple hybrid system is most economical.