Ppt turbine governing system powerpoint presentation free. Model the dynamics of speed governing system, steam. This gives the advantage on throttle governing where the power reduction will happen gradually. Thus, governing valves enable the turbine to achieve higher efficiency, even at partial loads. The steam turbine training course has been developed to assist in turbine maintenance and turbine operation. Steam turbines governing system training demo, click on. Please practice handwashing and social distancing, and check out our resources for adapting to these times. Ppt steam turbine governing system powerpoint presentation. The schematic representation of hydraulic governor control is shown in. The plant utilizes multiple turbines including this general electric package rated for 28.
Steam turbine control valve, governing and lube oil system. Pdf simulation of speed steam turbine control system. Pdf the turbine control system is one of the key control loops in the dynamic performance of. Pdf robust controller design for governing steam turbine power. The governing system described in this paper is designed for turbine generator sets in the power range 220mw to mw. The steam turbine working principle and theory has been explained in. This code is also applicable to the testing of speed and load governing systems for steam turbine generator units with the steam turbines classified as follow. The plant is run in parallel to the local utility in a droop base load mode. Steam turbine governing steam turbine governing is the procedure of controlling the flow rate of steam into a steam turbine so as to maintain its speed of rotation as constant.
Steam turbine losses in steam turbine mechanicaltutorial. Download turbine electro hydraulic governor control system. Throttle governing of steam turbine pdf jewellery trendz. Steam turbine governing system is a method, used to maintain a constant steady speed of turbine. The variation in load during the operation of a steam turbine can have a significant impact on its performance. Steam turbine training and governing system training steam. Governing system of the turbine does the following functions. Steam turbine control systems are being designed with todays technology to operate a turbine in a safe and reliable manner. Governing system of gas turbine control theory throttle. Steam turbines governing system engineering software. The steam turbine is controlled by the governor, which can be. Mar 08, 2020 steam turbine governing system download as powerpoint presentation.
Speed and loadgoverning systems for steam turbinegenerator. Steam turbines have a set of rotating blades and a row of fixed half moon blades. Sep 10, 2012 steam turbine training and governing system training. In this paper a multivariable pid controller is designed for the governing system of steam turbine power generators. The governor is a control component with advanced protections for the turbine which ensure safe operation of the turbine. Steam turbines classification, governing equations and. It may also be used, where appropriate, for other types of steam turbines.
The function of the steam turbine protection system is often confused with the control system, but in fact the two systems are entirely separate. Two or more steam turbine choices are available for each stag system. In case of steam turbines when it is connected to drive an alternator for converting its mechanical energy into electrical energy, device is used to vary the turbine output according to the load on the alternator with very small fluctuations in speed, called governor. Therefore, the amount of steam that enters each chest is controlled independently. Our steam turbines serve a vast range of industries ranging from food and sugar to biomass and textiles and beyond. But this loss can be minimized through some process. Steam turbine training and governing system training. Steam turbine governing systems and electronic governor retrofit 159 process is required at a specific pressure below the inlet pressure. What is governing system of turbine and its working. Governing of steam turbine is the procedure of controlling the flow rate of steam to a steam turbine so as to maintain the speed of the turbine fairly constant irrespective of load on the turbine. There have been numerous causes of steam turbine failures worldwide. Gcs has supplied a turbine generator control, monitoring, and actuation system for a large paper mill. The cbt also covers steam turbines and the governing system in detail and includes woodwardtype governor operation. The speed governing system consists of a proportional regulator, a speed relay, and a servomotor controlling the gate opening.
Ger3582e steam turbines for stag combinedcycle power. Gland steam must have appropriate temperature and pressure which must be controlled during startup. In case of turbines with cooling water preheating and lowpressure lp. If your steam turbine has a mechanical hydraulic overspeed trip device, it is recommended the overspeed trip device be replaced with an electronic overspeed system. The importance of this method is, the turbine can maintain a constant steady speed irrespective of variation of its load. The governor does this function by controlling the steam flow through the turbine by adjusting the control value. The primary function of a turbine governing system is to control the speed and load of the turbine in a safe and stable manner by modulation of the steam valves. Pdf steam turbine control systems are being designed with todays technology to operate a. Sep 10, 2012 sep 10, 2012 steam turbine training and governing system training stay safe and healthy. The purpose of acceptance tests of steam turbine speed governing and overspeed protection systems is to verify any criteria quoted in the manufacturers guarantees. Approval issue module 2347 the turbine governing system. This pdf explains in details about the different types of governing systems being used in gas turbines. In both the noncondensing and condensing type units, a single or double controlled extraction may be considered, depending on the number of openings that steam exits the turbine prior to the exhaust figure 6. Prior to supplying steam to the turbine, the steam supply pipelines have to be drained and heated up.
So the use of nozzle governing is limited to small turbines. Both operational modes for throttle governing and nozzle governing are shown in fig. The steam turbine and governor block implements a complete tandem compound steam prime mover, including a speed governing system, a fourstage steam. These requirements include basic design, materials. Turbine governing system 1 turbine governing system presented by. Such tests will generally be carried out to check compliance with iec 451. The steam turbine and governor block implements a complete tandemcompound steam prime mover, including a speed governing system, a fourstage steam turbine, and a shaft with up to four masses. This is a presentation on 500mw steam turbine governing system using electrohydraulic control. The wheelshaped rotating blades sandwich the fixed blades. Chaplin encyclopedia of life support systems eolss summary the steam system supplies steam from the boiler or reactor to the turbine. How does an electrohydraulic governor system work in a.
It covers the governing system and includes working of the woodward governor type. Us2926680a emergency governing system for a steam turbine. Steam turbine and its governing free download as word doc. Scribd is the worlds largest social reading and publishing site. Governing system, which focuses on multimedia inputs like graphics. Steam turbine governing system powerpoint ppt presentation. The typical main turbine in nuclear power plants, in which steam expands from pressures about 6 mpa to pressures about 0.
The structure of electro hydraulic controller is comprises of following subcontrol loops. When turbine works, some factors have reduced the output of the turbine, known as the losses in steam turbine or internal loss in the turbine. Ehg can be mechanically isolated by closing the secondary oil line from the local. Steam turbine governing is the procedure of monitoring and controlling the flow rate of steam into the turbine with the objective of maintaining its speed of rotation as constant. Salent features of mw kwu turbine governing system kwu mw turbine is a throttle governed machine. Simultaneously, gland steam system is started to prevent air inleakage. The steam turbine training and governing system training, covers the various turbine types and provides detailed classifications. Governing system industrial steam turbine shandong. The parts of a steam turbine may be thought of as being in four groupings. General industrial steam turbine prefers a steam source of 42 kgcm2 600 psi at 482 oc 900 o f. Units with different steam turbines for stag combinedcycle power systems m.
Upgrade your steam turbine governor with a modern electronic governing system for improved reliability, control, and accuracy. Emergency governing system for a steam turbine filed april 26, 1957 2 sheetssheet 2 2a 4 fig. Us3427464a speed governing systems for steam turbines. Jiggling in speed governing system of siemens steam turbine. Thus governing system changes the turbine mechanical power output. The governing valves have a multivalve arrangement and effective diffusers to minimize inlet energy loss. The flow rate of steam is monitored and controlled by interposing valves between the boiler and the turbine. C61207 this standard specifies the minimum requirements for steam turbines for specialpurpose applications for use in the petroleum, petrochemical, and natural gas industries. The valves are operated sequentially to control the inlet steam flow into the turbine with minimum inlet pressure loss. On this channel you can get education and knowledge for general issues and topics. Woodward governor company reserves the right to update any portion of this publication at any. An electronic governor can provide precise speed control with fewer wearing parts than an equivalent mechanical governor. This report outlines the fundamentals of industrial steam turbine.
Maintenance and overhaul of steam turbines wgp42 05. Training software training videos steam turbine control valves cbt. System block diagram an overview sciencedirect topics. Overview the four main functions of the governing system1 are as follows. Model the dynamics of speed governing system, steam turbine. Steam turbine training governing system training course. There are many considerations to be taken when choosing a controller. The above picture is just a screen shot, click to see demo. H02p 904 7 claims abstract of the disclosure a speed governing system for a steam turbine comprises a governor valve for controlling the admission of steam to the turbine. Converts electrical govedning to hydraulic signal 2. In nozzle governing method, there will not be any importance to the steam inlet pressure and it is done by the boiler and bypass pressure control system. A typical turbine governing system has two unloaders one activated by low condenservacuum.
However in later steam turbine control hydraulic governor is provided in parley with the electrohydraulic governing as a back up control which readily assumes the turbine control in the event of ehc failure. The turbine electro hydraulic governor ehg control system controls steam flow to the turbine thorough a series of servodriven electrohydraulic valves. Turbine governing the steam flow through the control valve is proportional to the. An electronic governor is virtually maintenance free, provides more precise speed control, and has fewer wearing parts than mechanical systems. This international standard applies primarily to constantspeed steam turbines driving a. Ppt turbine governing system powerpoint presentation. Mar 31, 2017 please support us at so that we can add one more member to the team and will be able to release 2 educational videosmonth. Model the dynamics of speed governing system, steam turbine, and. To limit the speed rise to an acceptable limit upon a load rejection when the unit is suddenly disconnected from the load to control the power that is generated by controlling the position of the steam governing valve or fuel valve in gas turbines to control the speed of the turbogenerator during initial runup and. Steam turbine governing system download as powerpoint presentation.
Pdf session 6 session 6 steam turbine governing steam. Therefore, turbine governing is the procedure of controlling the flow rate of steam to a steam turbine. Regulates steam flow in the turbine secondary oil circuit 2. The methods used for governing the steam turbines are. Governing system of gas turbine free download as powerpoint presentation. Steam turbine governing and its mechanism ece tutorials. Jiggling in speed governing system of siemens steam turbine byrdj mechanical 7 jun 19 20.
Though there are several losses in a turbine, but here we will discuss some important internal losses in the turbine. This file format is generated from a complete amination. That animatiom contain dtailed functioning of the followings. Iec 61064 acceptance tests for steam turbine speed.
Theacti vatedunloader acts similarly to the loadlimiter, ie. An electrohydraulic actuator in the main steam line positions the throttle to call for more or less steam to keep the turbine at a constant speed if the turbine tries to slow down or speed up from load changes. Session 6 session 6 steam turbine governing steam turbine governing system system. The mitsubishi turbine ehg control system can be applied to a variety of turbine generator system designs. The various turbine types have been explained in detail. This download consists of snapshots from the training course on steam turbines and. Speed governing systems for steam turbines filed aug. The protection system operates only when any of the control system set point parameters are exceeded, and the steam turbine will be damaged if it continues to operate. The electronic governor may also improve plant production from driven equipment through enhanced steam management while providing realtime data on. Only one governor can be selected at a time through the process of hydraulic minimum selection. Steam turbine governing is the procedure of controlling the flow rate of steam to a steam turbine so as to maintain its speed of rotation as constant. Generally, an ebook can be downloaded in five minutes or less. Since this is the main source of energy transport it is a critical component in the plant.
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