CN201202584Y

CN201202584Y - Splashing-proof and signal apparatus of small-sized hydroelectric generating set

Info

Publication number: CN201202584Y
Application number: CNU200820048263XU
Authority: CN
Inventors: 刘志平
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-05-26
Filing date: 2008-05-26
Publication date: 2009-03-04
Anticipated expiration: 2018-05-26

Abstract

The utility model discloses a small hydraulic generating unit anti-runaway and signal device, which adopts a thyristor excitation device and an automatic shutdown switch K; the automatic shutdown switch K is in series connection with an auxiliary normally closed contact QF of a generator circuit breaker so as to connect and disconnect the breaker; an opening-reducing travel switch 2XK of a speed governor is set at the no-load opening position; and the device is also provided with a sound and light alarm signal JL. The anti-runaway and signal device has simple structure, small maintenance workload and low production cost; the application of the device can reduce the labor intensity of staff on duty and can also reduce 50% of the staff to greatly improve the economic benefit of small hydropower enterprises.

Description

Small hydro turbine group anti-runaway and telltale

Technical field

The utility model relates to a kind of device of small hydro turbine group, especially a kind of small hydro turbine group anti-runaway and telltale.

Background technique

The hydraulic generator unit is in operation, if electrical network generation interruption of service (as excess load, short circuit or the like), the protection equipment for generator action makes its circuit breaker trip; unit is removal of load just; this moment, water can all transfer unit hypervelocity energy to as if not quick closedown hydraulic turbine generator stator, thereby the anecdote event occurred flying.The unit operation that flies to escape can cause great machinery accident, jeopardizes operator on duty's safety.Therefore, small hydropower station safe operation HANDLING PROCEDURE regulation, hydraulic turbine generator must have the anti-runaway device, just can reach the requirement of national Ministry of Water Resources " water power plant safety control classification and annual test way ".At present, the selection of the hydraulic generator unit speed regulator of small hydropower station is then selected automatic speed governor to the unit that capacity is bigger, and the unit multiselect less to capacity moves speed regulator with hand ().Select the unit of automatic speed governor,, prevent that unit from flying the anecdote event in case after its biggest advantage was the removal of load of unit emergency stop valve trip, the stable unit frequency effect of automatic speed governor can close the carrying row that makes the return trip empty automatically with stator.But the automatic speed governor complex structure, maintenance workload is big, the cost height.

And select for use hand () to move the small power generation unit of speed regulator, because of its governor structure simple, easy to operate, the reliability height, the unit investment cost is low, so promoted the use of widely, but after in case its maximum shortcoming is the removal of load of unit emergency stop valve trip, need by the operator on duty with the manual pass carrying row that makes the return trip empty, labor intensity is big, the more important thing is that closing makes the return trip empty and carry that the aperture time is longer, can cause unit to fly anecdote so.

The model utility content

The technical problems to be solved in the utility model provides a kind of small hydro turbine group anti-runaway and telltale; it can prevent effectively that unit from flying the anecdote event; too high and the emergency stop valve trip removal of load of unit bearing and generator operation temperature can be sent the acoustooptic alarm signal automatically; remind the operator on duty to fix a breakdown as early as possible, guarantee unit safety.

For achieving the above object, the utility model is by the following technical solutions:

A kind of small hydro turbine group anti-runaway and telltale, adopt thyristor excitation device, an automatic shut down switch K has been installed, assist normally closed interlock QF to connect with generator breaker and carry out closure, disconnection control, and the aperture of the moving speed regulator of handle () reduces position limit switch 2XK and adjusts in the no-load opening position, and this device is provided with acoustooptic alarm advertiser JL in addition.

The utlity model has following beneficial effect:

(1) adopts thyristor excitation device, its degree of regulation height can guarantee the quality (constant generator voltage) of electric energy, the unit removal of load close make the return trip empty carry after, generator voltage still remains near the rating value, and this provides reliable operating power (station service) for shutting down automatically.

(2) by installing automatic shut down switch additional, reduced unnecessary shutdown and start operation, treat that power system restoration is normal after, unit can generate electricity by way of merging two or more grid systems quickly again at unloaded state.

(3) setting is equipped with flag alarm, can remind the operator on duty to note the abnormal conditions that take place in the unit operation, fixes a breakdown as early as possible, guarantees unit safety operation.

(4) the utility model is simple in structure, and maintenance workload is little, and cost is lower, the utility model has been installed after, not only alleviated operator on duty's labor intensity, and can reduce by 50% operator on duty, improved small power station's economic benefit of enterprises greatly.

Description of drawings

Fig. 1 small hydro turbine group anti-runaway and telltale figure.

Wherein:

U N-alternating current 220V power supply, K-automatic shut down switch, QF-generator breaker is assisted normally closed interlock, and 1KM-aperture increases A.C. contactor, 2KM-aperture reduces A.C. contactor, 1SB-aperture increasing button, 2SB-aperture reduces button, and 1XK-aperture increases position limit switch, 2XK-aperture reduces position limit switch, 2K-alarm switch, JL-acoustooptic alarm advertiser, 1～3WSJ-electric contact thermometer.

Embodiment

Embodiment 1:

As shown in Figure 1, after the unit start is generated electricity by way of merging two or more grid systems, should be with automatic shut down switch K closure, when generator breaker tripping operation removal of load, auxiliary normally closed interlock QF closure (shutdown command automatically), automatically shutdown control circuit is devoted oneself to work, be U → K → QF → 1KM → 2KM → 2XK → N, aperture reduces contactor 2KM and gets electronic work, when the motor of the moving speed regulator of hand () closes stator to the no-load opening position to the minimizing direction automatically fast, aperture reduces position limit switch 2XK action with automatic shutdown control circuit excision, and aperture reduces contactor 2KM dead electricity to be returned, and motor stops operating, unit just moves in no-load opening, the flow that enters water turbine this moment remains on unit rated speed (frequency) operation, has prevented that effectively the anecdote that flies of unit from dying, and has guaranteed the safe operation of unit.

Embodiment 2:

As shown in Figure 1, unit because of the accident circuit breaker trip after, can send the acoustooptic alarm signal automatically, be U → K → QF → 2SB → 2K → JL → N, acoustooptic alarm advertiser JL gets the electric alarm signal of sending, and reminds the operator on duty to note the abnormal conditions that take place in the unit operation, the aperture of having connected in this signal circuit reduces the normally closed interlock of button 2SB, when as long as the operation aperture reduces button 2SB minimizing guide vane opening, this signal circuit excision can be withdrawed from alarm signal.In order further to improve the safety reliability of unit; electric contact thermometer 1～the 3WSJ of the fore bearing of unit, rear bearing and generator is inserted in the alarm signal; unit is in running; in case its temperature too high (reaching setting value); when jeopardizing the safe operation of unit; just can send the acoustooptic alarm signal automatically; remind the operator on duty in time to get rid of potential safety hazard; guarantee unit safety operation; and can join with the test joint by alarm switch 2K, whether detect acoustooptic alarm advertiser JL intact.

The utility model has prevented to cause after the removal of load of small hydro turbine group effectively fly anecdote so, guaranteed the safe operation of unit.

Claims

1. small hydro turbine group anti-runaway and telltale, adopt thyristor excitation device, it is characterized in that: an automatic shut down switch K has been installed, assist normally closed interlock QF to connect with generator breaker and carry out closure, disconnection control, and the aperture of speed regulator is reduced position limit switch 2XK adjust in the no-load opening position, this device is provided with acoustooptic alarm advertiser JL in addition.

2. small hydro turbine group anti-runaway according to claim 1 and telltale is characterized in that: join with the input joint by alarm switch 2K, acoustooptic alarm advertiser JL connects with the normally closed interlock that aperture reduces button 2SB.