YWT series medium step-motor programmable microcomputer turbine governor The YWT series medium step-motor programmable microcomputer
governor is a new generation governor, designed and manufactured
for the medium and small power plant, and it includes pressure oil
device. This series governor include four kind of governor model
about operation capacity, whose capacity of the servomotor is
18000N. M、30000N.M、380000N.M、50000N.M. The working pressure is 2.5MPa or
4.0MPa. There dynamic and static quality are outstanding, all
performance specification achieve or surpass the requirement of the
national standards 《GB/T9652.11997Specifications of governors and
pressure oil supply units for hydraulic turbines》 It can make the
hydro generator unit run stably under all kinds of operation mode. Main components and characteristic of the electricity control
section: The microcomputer governor use the SIEMENS PLC .Use the technology
of directly measurement the unit and net frequency by PLC, to raise
the reliability of governor greatly. Use the Easyview touch screen as the human-machine interface.You
can observe all kinds of operation state about unit and set the
parameters and operate the governor conveniently through the touch
screen. The Electricity/displacement converter use the step motor and its
driver. The structure is simple, operation is reliable, the
requirement to oil is low, completely conquered the disadvantage of
the servo valve being easy to be blocked. The YWT series step-motor programmable microcomputer governor has
the main functions as follows: Realize the starting-up、stopping、synchronization of unit in
auto/manual mode, the regulation of unit load and emergency shut
down .etc. The unit trace the frequency of network automatically before
synchronization, and it can make the unit frequency achieve the
synchronous requirement rapidly. If the network frequency has
fault, it will switch to the frequency setting for starting-up
automatically. When in the manual operation mode, the output of the governor will
trace the guide vane opening automatically, and it can switch to
the auto state without disturbance. The auto operation state can
also switch to the manual state without disturbance. There is communication interface of host computer (Modbus RTU
agreement), to realize the computer monitoring management for the
whole factory, and satisfy the power plant that nobody or few
person is on duty. Fault automatic diagnose online, intelligent fault-tolerant
function to the fault about measurement of frequency and opening. Use AC and DC for power supply, keep the operation state of the
unit and send out alarm signal at the time of the lost of AC power
supply. Main technical specification of the YWT series medium step-motor
programmable microcomputer governor: a. Speed dead band of governor (ix)0.08% b. Nonlinear class of static characteristic ()<5% c. Lost more than 25% of rated load, dead time of servomotor
(T)0.2s d. When 100% load distribute between units, be higher than 3% rated
speed in the regulate process the number of wave ridge
N<2regulation time T<40S. The range of main regulation parameters about YWT series step-motor
programmable microcomputer governor: a. Proportion factor (KP)0~20 b. Integral factor (KI)0~10（1/S） c. Differential factor (KD)0~5（S） d. Range of adjustment of the permanent speed droop (b)0~10% e. Artificial dead zone of frequency(E)0~±1% f. Range of adjustment of speed at no load (fG)50±5HZ g. Range of adjustment of power (PG)0~100% h. (Power supply): DC220V、110V、48V500W AC220V±10% Single-phase500W Structure and Arrangement This governor is composed to the integral type governor cabinet by
the electricity cabinet、the mechanical hydraulic component and oil
pressure device. PLC、touch screen、step-motor drive、switch power
supply, etc, such electrical component is set in the electricity
cabinet, which is isolated with the mechanical component. The
adjustment maintains and checking measurement are both extremely
convenient. The servomotor and leakage oil tank is connected
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