CN116696685A - Fan slip ring communication fault detection circuit and detection method - Google Patents

Abstract

A fan slip ring communication fault detection circuit comprises a cabin control cabinet and a variable pitch system; the main station of the cabin control cabinet is positioned in the cabin of the wind driven generator, and the slave station of the pitch control system is positioned in the hub; the master station and the slave station are connected by a communication line through a communication slip ring; a fault detector is connected in series on a communication line between the communication slip ring and the slave station, and the fault detector can output various fault types indicating the existence of the communication line between the communication slip ring and the slave station; by changing the connection mode of the slip ring communication wires, the number of modules through which the communication wires pass is reduced, the wiring times of the communication wires are reduced, the complexity of the system is reduced, and the communication failure rate is reduced.

Description

Fan slip ring communication fault detection circuit and detection method

Technical Field

The invention relates to the field of wind power generation, in particular to a fan slip ring communication fault detection circuit and a detection method.

Background

The marine H82 type 2.0MW fan is one of the main power types of the wind power plant, all units of the original plant adopt a Beifu PLC main control system, and a pitch control system adopts a pitch control assembly of Mu Ge. After the H82 unit is automatically thrown into the machine, the variable pitch system of the machine is always poor in performance, and although the machine is technically improved back and forth for many times, the effect is not obvious. Mu Ge pitch communication faults are usually resettable, and have hidden fault causes, so that the detection difficulty of the Mu Ge pitch communication faults is highest in wind power overhaul, and the longest detection time is required.

At present, a communication protocol is a CAN bus protocol, a Profibus protocol is used for communication with a cabin, the hub is connected with the cabin through a slip ring, and a conversion module which is double the number of the buses is used for carrying out communication protocol conversion in the hub, so that the purpose of real-time communication between the cabin and the hub is achieved. Because of using two protocols, the hub needs a large number of conversion modules for communication connection and conversion, so that the complexity of the system is high, and the difficulty and the efficiency of fault detection by adopting a circuit breaking method are high when communication faults occur.

Disclosure of Invention

In order to solve the technical problems, the invention adopts the following technical scheme:

a fan slip ring communication fault detection circuit comprises a cabin control cabinet and a variable pitch system; the method is characterized in that: the main station of the cabin control cabinet is positioned in the cabin of the wind driven generator, and the slave station of the pitch control system is positioned in the hub; the master station and the slave station are connected by a communication line through a communication slip ring; a fault detector is connected in series with a communication line between the communication slip ring and the slave station, and the fault detector can output a plurality of fault types indicating the existence of the communication line between the communication slip ring and the slave station.

The method also comprises the following steps:

a detection method of a fan slip ring communication fault detection circuit is characterized by comprising the following steps of:

when communication faults occur, maintenance personnel perform the following processing procedures;

s1, checking the output of a fault detector, and when the LED indicator lamps L1, L2, L3 and L4 are all in a lamp-off state;

looking at the incoming line, looking at the wiring from 20 site to 40 site DP head, DP head is from hub to 20 site of nacelle: checking a line barrier from the slip ring to the engine room;

s2, checking a fault detector, and judging and processing the corresponding fault type when the LED indicator lamps L1, L2, L3 and L4 have different on-off states.

The invention has the beneficial effects that: by changing the connection mode of the slip ring communication wires, the number of modules through which the communication wires pass is reduced, the wiring times of the communication wires are reduced, the complexity of the system is reduced, and the communication failure rate is reduced.

Drawings

FIG. 1 is a schematic diagram of a single fan communication system;

FIG. 2 is a diagram of a prior art nacelle hub communication line.

FIG. 3 is a communication line diagram of the nacelle entering the hub after modification.

Fig. 4 is a fault detector circuit diagram.

In the figure; 10. fault detector, L1, L2, L3, L4, fault indicator, 1, 2, 1', 2', communication line terminal, 3', communication line shielding terminal.

Detailed Description

The invention will be further described with reference to the accompanying drawings, it being understood that the description is only for the purpose of illustrating and explaining the invention, and not for the purpose of limiting the same.

Referring to fig. 1, a single fan communication system is schematically illustrated. The 20 sites of the cabin control cabinet are positioned in the cabin of the wind driven generator, and the 40 sites of the pitch system are positioned in the hub. The hub is provided with fan blades, and the variable pitch system drives the fan blades to perform variable pitch actions. During normal power generation operation, the hub is in a rotating operation state relative to the nacelle. And the 20 sites and the 40 sites adopt Profibus protocol communication, and a communication slip ring is used for communication line connection.

Referring to FIG. 2, a prior art nacelle hub communication scheme is shown. DP communication lines from the nacelle 20 station access one side of slip ring M20. The other side of the slip ring M20 is output and connected with a lightning protector. The output of the lightning protection device is connected to an EL6751 module, the EL6751 module and the EL6751 module are communicated through a backboard bus, and the EL6751 module is used as a Profibus slave station to be communicated with a Profibus master station of the cabin.

Because the marine Mu Ge pitch-variable communication system in the hub uses a CAN communication protocol, but the marine cabin PLC is a Profibus protocol, after entering the hub through the Profibus protocol, the marine cabin PLC is in bus communication with the EL6751 module, and the marine cabin PLC is converted by using the EL6751 module of the hub, so that a data instruction conforming to the CAN communication protocol is generated.

The lightning protection device is connected in the communication line, in practical application, various faults are easy to occur in the work of the lightning protection device, such as faults of device failure, line disconnection, line shielding damage, line grounding and the like, and the lightning protection device body has no fault indication function. The space in the hub is narrow, the line installation position of the lightning protection device is easy to be blocked, and a plurality of line contact columns need to be detected when the line is broken down to check faults, so that the operation of personnel is inconvenient.

Referring to FIG. 3, an improved nacelle-hub communication scheme is shown. DP communication lines from the nacelle 20 station are connected to the slip ring M20 side. The other side of the slip ring M20 is output and connected to a fault detector 10, and the fault detector 10 is provided with DP communication line bidirectional connection terminals 1, 2, 1', 2', and DP communication line shielding connection terminals 3, 3'. The fault detector 10 is connected to the slip ring M20 via a first DP communication line and also to the Profibus slave EL6731 module via a second DP communication line.

The first DP communication line and the second DP communication line are shielding communication lines, and shielding layers of the shielding lines are respectively connected with the wiring terminals 3 and 3'.

Referring to fig. 4, a fault detector circuit schematic is shown. Wherein the fault detector has connection terminals 1, 2, 1', 2', 3'. An LED indicator lamp L1 is bridged between the wiring terminals 1 and 2, and an LED indicator lamp L2 is bridged between the wiring terminals 2 and 3; an LED indicator lamp L3 is bridged between the wiring terminals 1 and 2', and an LED indicator lamp L4 is bridged between the wiring terminals 2 and 3'; the LED indicator lamps L1, L2, L3 and L4 form a fault indication circuit.

The wiring terminals 1 and 1 are directly connected through circuits; the wiring terminals 2 and 2' are directly connected through circuits; the wiring terminals 3 and 3' are directly connected with the circuit and are connected with the PE grounding point.

The lightning protector in the original communication line is replaced by the fault detector 10, so that the probability of faults is reduced, and a rapid fault clearing indication function is provided.

In specific use, when a communication failure occurs, a serviceman performs the following processing procedure.

S1, checking the output of the fault detector, and when the LED indicator lamps L1, L2, L3 and L4 are all in a lamp-off state.

Looking at the incoming line, looking at the wiring from 20 site to 40 site DP head, DP head is from hub to 20 site of nacelle: and checking the line obstacle from the slip ring to the engine room.

S2, checking a fault detector, and judging and processing the fault types corresponding to the engine room end and the wheel hub end when the LED indicator lamps L1, L2, L3 and L4 have different on-off states. The method comprises the following steps:

1) The L1 is bright, the communication of the cabin end is normal, and the L1 is off, the communication of the cabin end is cut off;

2) The L2 is the communication of the cabin end which is not grounded, the L2 is the communication fault of the cabin end, and the communication line is grounded;

3) L3 is bright and the communication of the hub end is normal, and L3 is dead and the communication of the hub end is cut off;

4) L4 goes out to be hub end communication and is not grounded, and L4 is bright to be hub end communication trouble, and the communication line is grounded.

Finally, it should be noted that: the foregoing is merely illustrative of the present invention and is not to be construed as limiting thereof, and although the present invention has been described in detail, it will be apparent to those skilled in the art that modifications may be made to the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A fan slip ring communication fault detection circuit comprises a cabin control cabinet and a variable pitch system; the method is characterized in that: the main station of the cabin control cabinet is positioned in the cabin of the wind driven generator, and the slave station of the pitch control system is positioned in the hub; the master station and the slave station are connected by a communication line through a communication slip ring; a fault detector is connected in series with a communication line between the communication slip ring and the slave station, and the fault detector can output a plurality of fault types indicating the existence of the communication line between the communication slip ring and the slave station.

2. The fan slip ring communication fault detection circuit of claim 1, wherein: the fault detector adopts LED indicator lights to output, and the corresponding fault type is judged by utilizing different on-off states of a plurality of LED indicator lights.

3. The fan slip ring communication fault detection circuit of claim 1, wherein: a communication line from a cabin main station is connected to one side of the slip ring, and the other side of the slip ring is output and connected to a fault detector; the fault detector outputs access to the slave stations.

4. A fan slip ring communication failure detection circuit according to claim 3, wherein: the fault detector is provided with communication line bidirectional connection terminals 1, 2, 1', 2', and communication line shielding connection terminals 3, 3'; the fault detector is connected with the slip ring through the connecting terminals 1 and 2, and is also connected with the secondary station module through the connecting terminals 1', 2', the communication line adopts a shielding communication line, and the shielding layers of the communication line are respectively connected with the connecting terminals 3 and 3'.

5. The fan slip ring communication fault detection circuit of claim 4, wherein: an LED indicator lamp L1 is bridged between the wiring terminals 1 and 2 of the fault detector, and an LED indicator lamp L2 is bridged between the wiring terminals 2 and 3; an LED indicator lamp L3 is bridged between the wiring terminals 1 and 2', and an LED indicator lamp L4 is bridged between the wiring terminals 2 and 3'; the LED indicator lamps L1, L2, L3 and L4 form a fault indication circuit.

6. The fan slip ring communication fault detection circuit of claim 4, wherein: the wiring terminals 1 and 1 are directly connected through circuits; the wiring terminals 2 and 2' are directly connected through circuits; the wiring terminals 3 and 3' are directly connected with the circuit and are connected with the PE grounding point.

7. The fan slip ring communication fault detection circuit of claim 1, wherein: the master site and the slave site communicate by adopting Profibus protocol, and a DP communication line is adopted.

8. The fan slip ring communication fault detection circuit of claim 7, wherein: the in-hub pitch control system adopts a CAN communication protocol, and after entering the hub through a Profibus protocol, a cabin PLC master station performs bus communication with a slave station module and uses a protocol conversion module in the hub to perform conversion, so that a data instruction conforming to the CAN communication protocol is generated.

9. The detection method of the fan slip ring communication fault detection circuit based on the claims 1-8 is characterized by comprising the following steps:

when communication faults occur, the following processing procedure is carried out;

s1, checking the output of a fault detector, and when the LED indicator lamps L1, L2, L3 and L4 are all in a lamp-off state;

looking at the incoming line, looking at the wiring from the master site to the slave site DP head, which is directly from the hub to the slave site of the nacelle: checking a line barrier from the slip ring to the engine room;

s2, checking a fault detector, and judging and processing the fault types corresponding to the engine room end and the wheel hub end when the LED indicator lamps L1, L2, L3 and L4 have different on-off states.

10. The method of claim 9, wherein:

s2 includes the following fault conditions:

1) The L1 is bright, the communication of the cabin end is normal, and the L1 is off, the communication of the cabin end is cut off;

2) The L2 is the communication of the cabin end which is not grounded, the L2 is the communication fault of the cabin end, and the communication line is grounded;

3) L3 is bright and the communication of the hub end is normal, and L3 is dead and the communication of the hub end is cut off;

4) L4 goes out to be hub end communication and is not grounded, and L4 is bright to be hub end communication trouble, and the communication line is grounded.