CN205117613U

CN205117613U - A safety loop for wind turbine generator system overspeed protection

Info

Publication number: CN205117613U
Application number: CN201520908503.9U
Authority: CN
Inventors: 苏倩; 刘朋; 赵双喜; 江军谊
Original assignee: TIANJIN RUIYUAN ELECTRICAL CO Ltd
Current assignee: TIANJIN RUIYUAN ELECTRICAL CO Ltd
Priority date: 2015-11-13
Filing date: 2015-11-13
Publication date: 2016-03-30
Anticipated expiration: 2025-11-13

Abstract

The utility model provides a safety loop for wind turbine generator system overspeed protection, install gyroscope, controller and alarm relay on wheel hub including three evenly distributed, gyroscope signal connection controller, controller control connection alarm relay, the safety loop of wind turbine generator system's change oar system self puts in series for alarm relay's contact. The utility model discloses has following advantage: direct detect current fan whether be in the hypervelocity state in wheel hub, and no longer need detect to exceed the speed limit through major control system and redispatch the order and want changes persuing oar system feathering, avoid correctly to carry out the feathering because of fan sliding ring or other positions connect because of the circuit is virtual or other interference result in change oar when the hypervelocity and take place the driving accident.

Description

A kind of safety circuit for Wind turbines overspeed protection

Technical field

The utility model is created and is belonged to aerogenerator unit safe technical field, especially relates to a kind of safety circuit for Wind turbines overspeed protection.

Background technique

Overspeed protection is the important ring in aerogenerator unit safe chain, its objective is to prevent blower fan generation driving, causing blade broken, and blower fan such as to topple at the severe safety problem.

In the prior art, it is generally by being installed on main shaft that Wind turbines detects hypervelocity, the encoder of high speed shaft or generator afterbody detects Transmitted chains rotating speed, and when this rotating speed exceedes a certain safe threshold, Wind turbines can be communicated by master control system or hardwire theft-resistant link chain circuit requirements pitch-controlled system carries out feathering.

But in actual motion, owing to no matter being communication between master control system and change oar or adopting hardwire theft-resistant link chain loop all can pass through slip ring, when there is slip ring carbon brush and slip ring bad connection is good or the fault such as the circuit virtual connection at other positions time, the feathering order likely causing pitch-controlled system not receive master control system sending, still normally drive oar to run, finally cause the too fast generation driving of rotation speed of fan.

Model utility content

In view of this, the utility model is created and is intended to propose a kind of safety circuit for Wind turbines overspeed protection, correctly can not perform feathering to avoid the change oar caused because of circuit virtual connection or other interference because of blower fan slip ring or other positions when exceeding the speed limit.

For achieving the above object, the technological scheme that the utility model is created is achieved in that

For a safety circuit for Wind turbines overspeed protection, comprise three and be uniformly distributed the gyroscope be installed on wheel hub, controller and alarming relay; Described gyroscope signal connection control device, described controller control connection alarming relay, the safety circuit of the pitch-controlled system self of the contact series access Wind turbines of described alarming relay.

Further, described controller is arranged in pitch-controlled system.

Further, described three gyroscopes are uniformly distributed on the main shaft end face that is installed in wheel hub.

Relative to prior art, the utility model is created has following advantage:

(1) whether directly in wheel hub, detect current blower fan is in overspeed condition, and no longer need to detect to exceed the speed limit by master control system to send order request pitch-controlled system feathering again, whether pitch-controlled system oneself can detect blower fan and exceed the speed limit, avoid because of blower fan slip ring or other positions because of circuit virtual connection or other disturb the change oar caused correctly can not perform feathering when exceeding the speed limit and runaway accident occur; Thus improve the safety and reliability of fan operation;

(2) and adopt the hardware cost paid of the program significantly lower than the scheme of existing employing encoder, have more economical.

Accompanying drawing explanation

The accompanying drawing forming the part that the utility model is created is used to provide the further understanding created the utility model, the schematic description and description that the utility model is created, for explaining that the utility model is created, does not form the improper restriction created the utility model.In the accompanying drawings:

Fig. 1 is the circuit theory diagrams of safety circuit described in the utility model creation embodiment;

Fig. 2 is the mounting point schematic diagram of gyroscope in wheel hub described in the utility model creation embodiment.

Embodiment

It should be noted that, when not conflicting, the embodiment in the utility model creation and the feature in embodiment can combine mutually.

Below with reference to the accompanying drawings and describe in detail in conjunction with the embodiments the utility model create.

For a safety circuit for Wind turbines overspeed protection, as shown in Figure 1, comprise three and be uniformly distributed gyroscope s1, s2, s3 of being installed on wheel hub, controller C and alarming relay K; Described gyroscope s1, s2, s3 signal connection control device C, the safety circuit of the contact series access pitch-controlled system self of described controller C control connection alarming relay K, described alarming relay K.

During installation, gyroscope s1, s2, s3 being uniformly distributed according to position is as shown in Figure 2 installed in wheel hub, because gyroscope s1, s2, s3 are mutually 120 ° of distributions in wheel hub, adding and offsetting of the rotating speed acceleration therefore measured by them is subject to the impact of gravity accleration; The distance of gyroscope s1, s2, s3 distance hub centre point as parameter r by being set in the controller C of measure loop, for the current rotating speed that converts; Described controller C can be arranged in pitch-controlled system.

Described for Wind turbines overspeed protection the working procedure of safety circuit as follows:

First, be uniformly distributed by three gyroscope s1, s2, the s3 be installed on wheel hub and detect hub rotation speed acceleration under current rotating speed in real time, and send checkout value to controller c;

Afterwards, checkout value is converted to corresponding tachometer value ω by controller c, and tachometer value ω and over speed of rotation are protected setting value ω ₀compare; When this tachometer value ω exceedes the over speed of rotation protection setting value ω of setting ₀time, i.e. ω > ω ₀time, controller C drives alarming relay k break contact, because this contact is by the safety circuit of access pitch-controlled system self of connecting, when contact disconnects, pitch-controlled system is feathering immediately, avoids blower fan hypervelocity driving; As ω≤ω ₀time, controller C drives alarming relay K adhesive contact, becomes oar and normally runs.

The foregoing is only the preferred embodiment that the utility model is created; do not create in order to limit the utility model; within all spirit of creating at the utility model and principle, any amendment done, equivalent replacements, improvement etc., within the protection domain that all should be included in the utility model creation.

Claims

1. for a safety circuit for Wind turbines overspeed protection, it is characterized in that: comprise three and be uniformly distributed the gyroscope be installed on wheel hub, controller and alarming relay; Described gyroscope signal connection control device, described controller control connection alarming relay, the safety circuit of the pitch-controlled system self of the contact series access Wind turbines of described alarming relay.

2. the safety circuit for Wind turbines overspeed protection according to claim 1, is characterized in that: described controller is arranged in pitch-controlled system.

3. the safety circuit for Wind turbines overspeed protection according to claim 1, is characterized in that: described three gyroscopes are uniformly distributed on the main shaft end face that is installed in wheel hub.