A verification device for relay protection device and verification method thereof

Abstract

The present invention belongs to the technical field of module design of electric relay protection device, and specifically relates to a verification device for relay protection device and a verification method thereof, comprising: a direct current power supply, three variable alternating current sources, one variable alternating voltage source, a wiring port group of a protection device to be verified, a switch component, a variable alternating current source knob, a protection node action indicator light group and a variable alternating voltage knob, a grounding port, a grounding wire, and a plurality of lead wires; the direct current power supply, the three variable alternating current sources, and one variable alternating voltage source are respectively connected to the configuration ports of the wiring port group of the protection device to be verified; the variable alternating current source knob is connected to the three variable alternating current sources; the variable alternating voltage knob is connected to the one variable alternating voltage source; the protection node action indicator light group is respectively connected to the configuration ports of the wiring port group of the protection device to be verified.

Description

Technical Field

[0001] The invention belongs to the technical field of electric relay protection device module design, and in particular relates to a verification device for a relay protection device and a verification method thereof. Background Art

[0002] In the power system of Units 3 and 4 of a nuclear power plant, the relay protection device can respond to the power bus fault of the power plant, and quickly, accurately and selectively operate on the circuit breaker to cut off the faulty equipment and ensure the reliable operation of the system. The power relay protection device for the power plant is divided into transformer comprehensive protection device, motor protection comprehensive protection device, differential protection comprehensive protection device and other protection devices, with a total of about 400 units. The calibration of the protection device is an important task of relay protection in the overhaul of the power plant. In the actual calibration process, due to the complex calibration wiring, large number, the calibration device and the device being calibrated often have inconsistent sensitivity matching and other factors, resulting in large deviations in the experimental results. The experiment is repeated, and the protection device is repeatedly and incorrectly calibrated, which not only damages the experimental instruments and delays the construction period, but also may cause safety accidents.

[0003] Therefore, it is necessary to design a verification device and a verification method for a relay protection device in response to the above technical problems, so as to improve the verification efficiency of the protection device, reduce the overhaul working time of the nuclear power plant, improve economic benefits, and reduce the safety risks of personnel and equipment. Summary of the invention

[0004] The purpose of the present invention is to design a verification device and a verification method for a relay protection device to solve the technical problem that operators are prone to electrical mis-touch, mis-contact and mis-connection when verifying relay protection devices during on-site work.

[0005] The technical solution of the present invention:

[0006] A verification device for a relay protection device, comprising: a DC power supply, three variable AC current sources, one variable AC voltage source, a connection port group of a protection device to be verified, a switch component, a variable AC current source knob, a protection node action indicator light group and a variable AC voltage knob, a grounding port, a grounding wire, and a plurality of lead wires;

[0007] The DC power supply, three variable AC current sources, and one variable AC voltage source are respectively connected to the configuration ports of the wiring port group of the protection device to be checked;

[0008] The variable AC current source knob is connected to three variable AC current sources;

[0009] The variable AC voltage knob is connected to a variable AC voltage source;

[0010] The protection node action indicator light groups are respectively connected to the configuration ports of the wiring port group of the protection device to be verified;

[0011] The grounding port is connected to the configuration port of the wiring port group of the protection device to be checked through a grounding wire;

[0012] The switch button assembly includes: a three-way variable AC current source selection switch A, a three-way variable AC current source selection switch B, a three-way variable AC current source selection switch C, a DC power supply end air switch and a one-way variable AC voltage source air switch;

[0013] The variable AC voltage source air switch is connected to a variable AC voltage source through a wire;

[0014] The three-way variable AC current source selection switch A, the three-way variable AC current source selection switch B, and the three-way variable AC current source selection switch C are respectively connected in parallel with the three-way variable AC current source through wires;

[0015] The air switch at the DC power supply end is connected to the DC power supply through a wire.

[0016] The port group of the connection of the protection device to be checked includes: a variable voltage input port of the protection device to be checked, a variable current input port of the protection device to be checked, an auxiliary power supply port of the protection device to be checked, a protection device action node action indicator group port and a protection device to be checked grounding port;

[0017] The variable AC voltage source is connected to the variable voltage input port of the protection device to be tested;

[0018] The three variable AC voltage sources are connected to the variable current input ports of the protection device to be verified;

[0019] The DC power supply is connected to the auxiliary power port of the protection device to be tested;

[0020] The protection node action indicator light group is connected to the protection device action node action indicator light group port; the protection device action node action indicator light group port also includes: a first group of protection device action node wiring terminals, a second group of protection device action node wiring terminals, a third group of protection device action node wiring terminals, a fourth group of protection device action node wiring terminals, and a fifth group of protection device action node wiring terminals;

[0021] The grounding port is connected to the grounding port of the protection device to be checked.

[0022] The protection node action indicator light group includes: a first node indicator light, a second node indicator light, a third node indicator light, a fourth node indicator light and a fifth node indicator light; the first node indicator light is connected to the first group of protection device action node wiring terminals, the second node indicator light is connected to the second group of protection device action node wiring terminals, the third node indicator light is connected to the third group of protection device action node wiring terminals, the fourth node indicator light is connected to the fourth group of protection device action node wiring terminals, and the fifth node indicator light is connected to the fifth group of protection device action node wiring terminals.

[0023] The current ranges of the three variable AC current sources are 0-1A and 0-5A.

[0024] The protection device to be verified of the DC power supply provides a 220V external auxiliary power supply.

[0025] The voltage range of the variable AC voltage source is 0-400V.

[0026] A verification method for a verification device for a relay protection device as described above comprises the following steps:

[0027] Step 1: Connect the verification device to the corresponding interface of the relay protection device, and connect the grounding wire of the verification device to the grounding point of the relay protection device;

[0028] Step 2: Connect the protection node action indicator light group on the verification device to the action node of the protection device to be verified through the protection node action indicator light group port;

[0029] Connect one variable AC voltage source in the verification device to the voltage input of the protection device; connect three variable AC current sources in the verification device to the current input of the protection device, and connect the DC power supply end of the verification device to the auxiliary power supply of the protection device;

[0030] Step 3: Close the air switch at the DC power supply end to energize the protection device to be tested; close the three-way variable AC current source selection switch A, the three-way variable AC current source selection switch B, and the three-way variable AC current source selection switch C, and energize the input current module of the protection device to be tested; rotate the variable AC current source knob to adjust the input current;

[0031] If the input current reaches the rated value of the protection device, the corresponding lights among the five node indicator lights of the verification device light up, the relevant current values ​​are recorded, and the current verification is completed.

[0032] Step 4: Close the air switch of a variable AC voltage source to energize the input voltage module of the protection device to be verified; rotate the knob of the variable AC voltage source to adjust the input voltage. If the input voltage reaches the rated value of the protection device, the five node indicators of the verification device light up, record the relevant voltage values, and the voltage verification is completed;

[0033] Step 5: After the verification test is completed, disconnect the air switch at the DC power supply end, the three variable AC current source switches and the one variable AC voltage source air switch in the verification device, and disconnect the connection line between the verification device and the protection device.

[0034] Beneficial effects of the present invention:

[0035] The present invention can perform verification of different protection types on different relay protection devices through centralized modular wiring. The device of the present invention also has the following technical advantages:

[0036] [1] The device of the present invention can classify the protection type of the protection device, and perform different types of protection verification through different modules of the device, thereby shortening the protection verification time and improving the verification accuracy.

[0037] [2] The relay protection verification device designed in the present invention centralizes the verification wiring in the device, reducing the number of wiring times during verification by operators and avoiding the problem of confusion of test lines during traditional verification.

[0038] [3] The relay protection verification device designed by the present invention has simple display, easy operation, simple overall structure, small size, easy to carry and use, and high sensitivity;

[0039] [4] The internal relay module of this device is highly reliable and easy to maintain and repair. The device is waterproof, dustproof and anti-leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is a schematic structural diagram of a verification device for a relay protection device according to the present invention;

[0041] Figure 2 An electrical wiring diagram of a verification device for a relay protection device according to the present invention; DETAILED DESCRIPTION

[0042] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0043] A verification device for a relay protection device, comprising: a DC power supply 1, three variable AC current sources 2, a variable AC voltage source 3, a connection port group 36 of a protection device to be verified, a switch assembly 37, a variable AC current source knob 38, a protection node action indicator light group 39 and a variable AC voltage knob 40, a grounding port 9, a grounding wire 10, and a plurality of conductors;

[0044] The DC power supply 1, three variable AC current sources 2, and one variable AC voltage source 3 are respectively connected to the configuration ports of the wiring port group 36 of the protection device to be checked;

[0045] The variable AC current source knob 38 is connected to the three-way variable AC current source 2; the variable AC current source knob 38 can adjust the current to obtain the action value of the protection device.

[0046] The variable AC voltage knob 40 is connected to a variable AC voltage source 3; the variable AC current source knob 40 can adjust the voltage to obtain the action value of the protection device.

[0047] The protection node action indicator light group 39 is respectively connected to the configuration ports of the protection device wiring port group 36 to be verified;

[0048] The grounding port 9 is connected to the configuration port of the connection port group 36 of the protection device to be checked through the grounding wire 10;

[0049] The switch button assembly 7 includes: a three-way variable AC current source selection switch A32, a three-way variable AC current source selection switch B33, a three-way variable AC current source selection switch C34, a DC power supply end air switch 31 and a one-way variable AC voltage source air switch 35;

[0050] The variable AC voltage source air switch 35 is connected to the variable AC voltage source 3 through a wire;

[0051] The three-way variable AC current source selection switch A32, the three-way variable AC current source selection switch B33, and the three-way variable AC current source selection switch C34 are respectively connected in parallel with the three-way variable AC current source 2 through wires;

[0052] The DC power supply end air switch 31 is connected to the DC power supply 1 through a wire.

[0053] The port group 36 for connecting the protection device to be checked includes: a variable voltage input port for the protection device to be checked, a variable current input port for the protection device to be checked, an auxiliary power supply port for the protection device to be checked, a protection device action node action indicator group port and a protection device to be checked grounding port;

[0054] The variable AC voltage source 3 is connected to the variable voltage input port of the protection device to be checked;

[0055] The three-way variable AC voltage source 2 is connected to the variable current input port of the protection device to be checked;

[0056] The DC power supply 1 is connected to the auxiliary power port of the protection device to be tested;

[0057] The protection node action indicator light group 39 is connected to the protection device action node action indicator light group port; the protection device action node action indicator light group port also includes: a first group of protection device action node wiring terminals, a second group of protection device action node wiring terminals, a third group of protection device action node wiring terminals, a fourth group of protection device action node wiring terminals, and a fifth group of protection device action node wiring terminals;

[0058] The grounding port 9 is connected to the grounding port of the protection device to be checked; the grounding port 9 is connected to the present verification device, and when internal components are damaged and leakage occurs, the leakage current is grounded to prevent personal injury; the grounding wire 10 connects the protection device to be checked and the grounding port 9 of the verification device, and when the protection device is abnormally damaged, the leakage current is grounded to prevent personal injury.

[0059] The protection node action indicator light group 39 includes: a first node indicator light 8, a second node indicator light 7, a third node indicator light 6, a fourth node indicator light 5 and a fifth node indicator light 4; the first node indicator light is connected to the first group of protection device action node terminals, the second node indicator light is connected to the second group of protection device action node terminals, the third node indicator light is connected to the third group of protection device action node terminals, the fourth node indicator light is connected to the fourth group of protection device action node terminals, and the fifth node indicator light is connected to the fifth group of protection device action node terminals.

[0060] The protection node action indicator light group 39, when the verified device is actuated, the dry node of the verified protection device is energized, so that the corresponding action node indicator light of the verification device lights up, displaying the relay action signal, and the action node of the protection device can be displayed according to this indicator light.

[0061] The current range of the three-way variable AC current source is 0-1A and 0-5A; wherein the three-way variable AC current source described in the embodiment is connected in parallel by three-way variable AC current source selection switch A32, three-way variable AC current source selection switch B33, and three-way variable AC current source selection switch C34 to provide 0-1A and 0-5A current sources for the protection device to be checked.

[0062] When the current of the protection device is verified, the device to be verified is connected to the three-way variable AC current source, and the current value is gradually increased to make the protection of the device to be verified actuated. The current value of the AC current power supply is read at this time, and the current value at this time is the action value of the protection device to be verified. When the device to be verified needs to use 0-1A, this range can be selected by the three-way variable AC current source selection switch position. When the device to be verified needs to use 0-5A, this range can be selected by the three-way variable AC current source selection switch position; that is, the current position switches on the three-way variable AC current source selection switch A32, the three-way variable AC current source selection switch B33, and the three-way variable AC current source selection switch C34 are all provided with two adjustment positions of 0-1A and 0-5A.

[0063] The protection device to be checked of the DC power supply 1 provides a 220V external auxiliary power supply.

[0064] In the embodiment, the voltage range of the variable AC voltage source is 0-400V. When a voltage of 0-400V is provided to the device to be verified to verify the voltage of the protection device, the device to be verified can be connected to this voltage source, and the voltage value is gradually increased to make the protection of the device to be verified take action. The voltage value at this time is read, and the voltage value at this time is the action value of the protected device;

[0065] An embodiment of a verification method for a verification device for a relay protection device as described above, wherein the specific verification steps in this embodiment are as follows:

[0066] Step 1: Connect the verification device to the corresponding interface of the relay protection device, and connect the grounding wire of the verification device to the grounding point of the relay protection device;

[0067] Step 2: Connect the protection node action indicator light group 39 on the verification device to the action node of the protection device to be verified through the protection device action node action indicator light group port;

[0068] The specific display of the protection node action indicator group is as follows:

[0069] The verification device is the first group of terminals of the protection device action node action indicator light group port through the protection device action node terminal 11 and the protection device action node terminal 12. The 11-12 terminal is connected to the action node of the protected device. When the protected device is actuated, the node signal is transmitted to the first node indicator light 8 to display the node action.

[0070] The verification device is a second group of terminals of the protection device action node action indicator group port through the protection device action node terminal 13 and the protection device action node terminal 14. The 13-14 terminal is connected to the action node of the protected device. When the protected device is actuated, the node signal is transmitted to the second node indicator 7 to display the node action.

[0071] The verification device is a third group of terminals of the protection device action node action indicator group port through the protection device action node terminal 15 and the protection device action node terminal 16. The 15-16 terminal is connected to the action node of the protected device. When the protected device is actuated, the node signal is transmitted to the third node indicator 6 to display the node action.

[0072] The verification device is a fourth group of terminals of the protection device action node action indicator group port through the protection device action node terminal 17 and the protection device action node terminal 18. The 17-18 terminal is connected to the action node of the protected device. When the protected device is actuated, the node signal is transmitted to the fourth node indicator 5 to display the node action.

[0073] The verification device is the fifth group of terminals of the protection device action node action indicator group port through the protection device action node terminal 19 and the protection device action node terminal 20. The 19-20 terminal is connected to the action node of the protected device. When the protected device is actuated, the node signal is transmitted to the fifth node indicator 8 to display the node action.

[0074] Connect a variable AC voltage source 3 in the verification device to the variable voltage input terminal of the protection device to be verified through the first group of connection terminals at the protection device input terminal; the first group of connection terminals at the protection device input terminal includes: a first group of connection terminals 21 at the protection device input terminal and a first group of connection terminals 22 at the protection device input terminal;

[0075] Connect the three variable AC current sources 2 in the verification device to the variable current input terminal of the protection device to be verified, through the second group of connection terminals at the protection device input terminal, the third group of connection terminals at the protection device input terminal, and the fourth group of connection terminals at the protection device input terminal;

[0076] The second group of connection terminals at the input end of the protection device includes: a second group of connection terminals 23 at the input end of the protection device and a second group of connection terminals 24 at the input end of the protection device;

[0077] The third group of connection terminals at the input end of the protection device includes: a third group of connection terminals 25 at the input end of the protection device and a third group of connection terminals 26 at the input end of the protection device;

[0078] The fourth group of connection terminals at the input end of the protection device includes: a fourth group of connection terminals 27 at the input end of the protection device and a fourth group of connection terminals 28 at the input end of the protection device;

[0079] The second group of connection terminals at the input end of the protection device can withstand an AC voltage of 0-400V of the protection device;

[0080] Connect the DC power supply terminal 1 of the verification device to the auxiliary power supply of the protection device to be verified through the DC power supply port of the verification device, and the DC power supply port of the verification device includes: a DC power supply terminal 29 of the verification device and a DC power supply terminal 30 of the verification device;

[0081] Step 3: Close the air switch 31 at the DC power supply end to energize the protection device to be tested; close the three-way variable AC current source selection switch A32, the three-way variable AC current source selection switch B33, and the three-way variable AC current source selection switch C34 to energize the input current module of the protection device to be tested; rotate the variable AC current source knob 38 to adjust the input current;

[0082] The three-way variable AC current source selection switch A32 can select the range of the branch AC current source to be 1A or 5A;

[0083] The three-way variable AC current source selection switch B33 can select the range of the branch AC current source to be 1A or 5A;

[0084] The three-way variable AC current source selection switch C34 can select the range of the branch AC current source to be 1A or 5A;

[0085] If the input current reaches the rated value of the protection device, the corresponding lights among the five node indicator lights of the verification device light up, the relevant current values ​​are recorded, and the current verification is completed.

[0086] Step 4: Close the variable AC voltage source air switch 35 to energize the input voltage module of the protection device to be checked; the variable AC voltage source air switch 35 controls the input and output of the auxiliary power supply of the protection device.

[0087] Rotate the variable AC voltage source knob 40 to adjust the input voltage. If the input voltage reaches the rated value of the protection device, the five node indicator lights of the verification device light up, and the relevant voltage values ​​are recorded, and the voltage verification is completed.

[0088] Step 4: After the verification test is completed, disconnect the air switch at the DC power supply end, the three-way variable AC current source switch and the one-way variable AC voltage source air switch in the verification device, and disconnect the connection line between the verification device and the protection device.

[0089] The present invention is described in detail above with reference to the accompanying drawings and embodiments, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of ordinary technicians in the field without departing from the purpose of the present invention. Any content not described in detail in the present invention can adopt the existing technology.

Claims

1. A verification device for a relay protection device, characterized in that: include: DC power supply, three variable AC current sources, one variable AC voltage source, a wiring port group of the protection device to be checked, a switch assembly, a variable AC current source knob, a protection node action indicator light group and a variable AC voltage knob, a grounding port, a grounding wire, and several lead wires; The DC power supply, three variable AC current sources, and one variable AC voltage source are respectively connected to the configuration ports of the wiring port group of the protection device to be checked; The variable AC current source knob is connected to three variable AC current sources; The variable AC voltage knob is connected to a variable AC voltage source; The protection node action indicator light groups are respectively connected to the configuration ports of the wiring port group of the protection device to be verified; The grounding port is connected to the configuration port of the wiring port group of the protection device to be checked through a grounding wire; The switch assembly includes: a three-way variable AC current source selection switch A, a three-way variable AC current source selection switch B, a three-way variable AC current source selection switch C, an AC power supply end air switch and a one-way variable AC voltage source air switch; The variable AC voltage source air switch is connected to a variable AC voltage source through a wire; The three-way variable AC current source selection switch A, the three-way variable AC current source selection switch B, and the three-way variable AC current source selection switch C are respectively connected in parallel with the three-way variable AC current source through wires; The air switch at the DC power supply end is connected to the DC power supply through a wire; The port group of the connection of the protection device to be checked includes: a variable voltage input port of the protection device to be checked, a variable current input port of the protection device to be checked, an auxiliary power supply port of the protection device to be checked, a protection device action node action indicator group port and a protection device to be checked grounding port; The variable AC voltage source is connected to the variable voltage input port of the protection device to be tested; The three variable AC voltage sources are connected to the variable current input ports of the protection device to be verified; The DC power supply is connected to the auxiliary power port of the protection device to be tested; The protection node action indicator light group is connected to the protection device action node action indicator light group port; the protection device action node action indicator light group port also includes: a first group of protection device action node wiring terminals, a second group of protection device action node wiring terminals, a third group of protection device action node wiring terminals, a fourth group of protection device action node wiring terminals, and a fifth group of protection device action node wiring terminals; The grounding port is connected to the grounding port of the protection device to be checked.

2. A verification device for a relay protection device according to claim 1, characterized in that: The protection node action indicator light group includes: a first node indicator light, a second node indicator light, a third node indicator light, a fourth node indicator light and a fifth node indicator light; the first node indicator light is connected to the first group of protection device action node wiring terminals, the second node indicator light is connected to the second group of protection device action node wiring terminals, the third node indicator light is connected to the third group of protection device action node wiring terminals, the fourth node indicator light is connected to the fourth group of protection device action node wiring terminals, and the fifth node indicator light is connected to the fifth group of protection device action node wiring terminals.

3. A verification device for a relay protection device as claimed in claim 2, characterized in that: The current ranges of the three variable AC current sources are 0-1A and 0-5A.

4. A verification device for a relay protection device as claimed in claim 3, characterized in that: The protection device to be verified of the DC power supply provides a 220V external auxiliary power supply.

5. A verification device for a relay protection device according to claim 4, characterized in that: The voltage range of the variable AC voltage source is 0-400V.

6. A verification method for a verification device for a relay protection device as claimed in any one of claims 1 to 5, characterized in that The steps include: Step 1: Connect the verification device to the corresponding interface of the relay protection device, and connect the grounding wire of the verification device to the grounding point of the relay protection device; Step 2: Connect the protection node action indicator light group on the verification device to the action node of the protection device to be verified through the protection node action indicator light group port; Connect one variable AC voltage source in the verification device to the variable voltage input terminal of the protection device to be verified; connect three variable AC current sources in the verification device to the variable current input terminal of the protection device to be verified, and connect the AC power supply terminal of the verification device to the auxiliary power supply of the protection device to be verified; Step 3: Close the air switch at the AC power supply end to energize the protection device to be tested; Close the three-way variable AC current source selection switch A, three-way variable AC current source selection switch B, and three-way variable AC current source selection switch C, and energize the input current module of the protection device to be verified; rotate the variable AC current source knob to adjust the input current; If the input current reaches the rated value of the protection device, the corresponding lights among the five node indicator lights of the verification device light up, the relevant current value is recorded, and the current verification is completed; Step 4: Close the air switch of a variable AC voltage source to energize the input voltage module of the protection device to be verified; rotate the knob of the variable AC voltage source to adjust the input voltage. If the input voltage reaches the rated value of the protection device, the five node indicators of the verification device light up, record the relevant voltage values, and the voltage verification is completed; Step 5: After the verification test is completed, disconnect the air switch at the DC power supply end, the three variable AC current source switches and the one variable AC voltage source air switch in the verification device, and disconnect the connection line between the verification device and the protection device.

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