An experimental simulation device and method for detecting the operating load capacity of a synchronous condenser

Abstract

The invention discloses an experimental simulation device and method for detecting the operating carrying capacity of a synchronous condenser, belonging to the technical field of condenser experimental devices; comprising a power grid as a total input end, a three-phase voltage regulator, a circuit breaker S1 and a stator winding of an electrically excited synchronous condenser are sequentially connected to the power grid, a short-circuit simulation device is arranged on the rotor winding of the electrically excited synchronous condenser, a detection device group is arranged on the electrically excited synchronous condenser, a branch 1 and a branch 2 are respectively connected to the rotor winding of the electrically excited synchronous condenser, a circuit breaker S2 and a DC excitation power supply are arranged on the branch 1, and a circuit breaker S3 and a high-power resistor are arranged on the branch 2. The invention adopts the above-mentioned device and method, and is provided with a plurality of detection devices for real-time monitoring of the state of the synchronous condenser, and the operating state of the synchronous condenser is adjusted by the input of the DC excitation power supply, so as to quickly simulate the operating state of the synchronous condenser under different working conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of phase condenser experimental devices, and in particular to an experimental simulation device and method for detecting the operating load-bearing capacity of a synchronous phase condenser. Background Art

[0002] my country's energy resources and power load are inversely distributed, and high-voltage transmission has the outstanding characteristics of long distance, large capacity and wide area. Among them, DC ultra-high voltage transmission has outstanding advantages such as large transmission capacity and has been widely used. In recent years, with the rapid development of DC ultra-high voltage transmission, there are problems such as DC commutation failure, dynamic reactive power reserve and insufficient voltage support in the power grid. As an excellent dynamic reactive power compensation device, large synchronous condenser can effectively deal with the reactive power regulation problems caused by the access of high-voltage DC and new energy to the power grid. It has unique advantages in improving the DC transmission limit power, improving the short-circuit ratio of the AC power grid at the receiving end of the DC ultra-high voltage transmission line, and enhancing the flexibility and stability of the power grid.

[0003] When large synchronous condensers are put into operation in the power grid, since the synchronous condensers need to adjust their operating status according to the power grid status, a large impact current will be generated when a power grid fails. In the long run, it will have a great impact on the synchronous condenser body. In severe cases, it will cause overtemperature, insulation damage, mechanical vibration, and cause a short circuit fault between the turns of the synchronous condenser rotor, causing it to fail to work normally, thereby further expanding the power grid fault and threatening the safe and stable operation of the power grid.

[0004] Since large synchronous condensers have been in operation for a short time, there is a lack of actual fault data on site, and synchronous condensers play a vital role in the DC UHV transmission system, it is impossible to use synchronous condensers running on site to simulate faults. In addition, as the capacity of synchronous condensers gradually develops towards large-scale, the operating load capacity requirements of key components inside the condensers are also increasing, so the detection of the operating load capacity of condensers is becoming more and more important. The continuous increase or abnormal increase in the temperature inside the condenser will deteriorate the working condition of the condenser, which will cause hazards such as increased insulation wear and insulation damage of the windings. Summary of the invention

[0005] The purpose of the present invention is to provide an experimental simulation device and method for detecting the operating carrying capacity of a synchronous condenser. The operating state of the synchronous condenser is monitored in real time by a detection device, and a short-circuit simulation device is provided. The short-circuit simulation device only needs to be short-circuited to simulate the impact of short-circuit faults of different degrees on the operation of the synchronous condenser. A DC excitation power supply is also provided, which can adjust the size of the DC power connected to the rotor winding. By adjusting the current, the operating state of the synchronous condenser can be adjusted to a no-load operating state, an over-excited operating state or an under-excited operating state. Through the above-mentioned device, the internal state of the synchronous condenser when short-circuit faults of different degrees occur in different operating states of the synchronous condenser can be simulated.

[0006] To achieve the above-mentioned purpose, the present invention provides an experimental simulation device for detecting the operating carrying capacity of a synchronous condenser, comprising a power grid as a total input end, a three-phase voltage regulator, a circuit breaker S1 and a stator winding of an electrically excited synchronous condenser connected in sequence behind the power grid, a short-circuit simulation device is provided on the rotor winding of the electrically excited synchronous condenser, a detection device group is provided on the electrically excited synchronous condenser, a branch 1 and a branch 2 are connected in series at the beginning and the end of the rotor winding of the electrically excited synchronous condenser, the branch 1 and the branch 2 are in parallel relationship, the branch 1 is provided with a circuit breaker S2 and a DC excitation power supply, the branch 2 is provided with a circuit breaker S3 and a high-power resistor, and the DC excitation power supply and the high-power resistor are in parallel relationship.

[0007] Preferably, the short-circuit simulation device comprises a plurality of slip rings installed on the rotating shaft of the electrically excited synchronous phase condenser, and short-circuit joints are led out from the rotor winding according to different percentages of the short-circuit turns of the rotor winding to the total number of turns of the rotor winding coil, and a plurality of the short-circuit joints correspond to different connections of the slip rings, and contact plates are provided on the slip rings, and different contact plates are connected to different interfaces in the short-circuit interface plate.

[0008] Preferably, the detection device group includes a three-phase electrical parameter analyzer, a speed sensor, a temperature detection device and an infrared detection device;

[0009] The three-phase electrical parameter analyzer is connected to the stator winding in the electrically excited synchronous condenser;

[0010] The speed sensor is installed on the rotating shaft of the rotor in the electrically excited synchronous condenser;

[0011] The temperature detection device includes a temperature patrol meter, which is connected to a plurality of thermocouples, and the plurality of thermocouples are embedded in the stator winding;

[0012] The infrared detection device comprises an infrared probe digital display, the infrared probe digital display is connected to an infrared detection probe, and the infrared detection probe is pointed to the rotor in the electrically excited synchronous condenser through a bracket;

[0013] The temperature inspection instrument displays and records the temperature of the thermocouples at various positions, and the infrared probe digital display records the rotor temperature.

[0014] An experimental simulation method for detecting the operating load capacity of a synchronous condenser comprises the following steps:

[0015] Step 1: Adjust the initial state of the equipment. For the three-phase voltage regulator, first adjust the three-phase voltage regulator to zero and keep the circuit breaker S1 in the disconnected state, then adjust the three-phase voltage regulator knob to make the AC output voltage of the three-phase voltage regulator reach the rated voltage of the electro-excitation synchronous phase condenser;

[0016] For the DC excitation power supply, close the circuit breaker S2, open the circuit breaker S3, start the DC excitation power supply, adjust the excitation current source output to the no-load rated excitation current, and then open the circuit breaker S2;

[0017] For the high-power resistor, close the circuit breaker S3 and connect a high-power resistor in series to the rotor winding of the electrically excited synchronous condenser. The resistance value of the high-power resistor is 10 times the resistance of the rotor winding coil.

[0018] Step 2: Close the circuit breaker S1, pass three-phase AC power into the stator winding, generate starting torque in the rotor winding, and the electrically excited synchronous condenser starts to run. Observe the value of the speed sensor, and the speed of the electrically excited synchronous condenser gradually accelerates to the rated speed;

[0019] Step 3: After reaching the rated speed, immediately close the circuit breaker S2, open the circuit breaker S3, and pass the rated DC excitation current into the rotor winding, so that the electrically excited synchronous condenser is pulled into synchronous speed operation;

[0020] Step 4: Adjust the DC excitation current to make the reactive power output of the electrically excited synchronous phase condenser zero, and observe and record the data of the temperature inspection meter and the infrared probe digital display meter;

[0021] Step 5: In the overexcitation operation state, gradually increase the DC excitation current, and the three-phase current of the stator winding of the electrically excited synchronous condenser will increase accordingly until the stator winding current reaches the rated value. The phase difference between the stator current and voltage of the electrically excited synchronous condenser on the three-phase electrical parameter analyzer should be +90°, and the reactive power generated reaches the maximum value. At this time, it is the maximum overexcitation state, and the temperature data is recorded and saved;

[0022] Step 6: In the no-load operation state, the DC excitation current is continuously reduced, and the three-phase current of the stator winding will decrease accordingly until the stator winding current reaches the minimum value and is close to zero. At this time, the phase difference between the stator winding current and the voltage of the electrically excited synchronous condenser should be 0°, the reactive power is zero, the current and voltage of the stator winding are in phase, and the electrically excited synchronous condenser is in the no-load state. Keep running in the no-load state for a period of time, and record and save the temperature data;

[0023] Step 7: In the under-excitation operation state, the DC excitation current continues to be reduced. At this time, the three-phase current of the stator winding of the electrically excited synchronous condenser increases instead, until the stator winding current reaches the rated value; this is the maximum under-excitation operation state, and the phase difference between the stator winding current and the voltage of the electrically excited synchronous condenser should be -90°. Keep the synchronous condenser running in the under-excitation state for a period of time, and record and save the temperature data;

[0024] Step 8: Use a short-circuit simulation device to simulate a short-circuit fault, and connect different interfaces on the short-circuit wiring board through short-circuit wires to achieve short-circuit faults of different degrees;

[0025] Step 9: The simulation process of different working conditions is as follows:

[0026] Execute steps 5 and 8 to complete the simulation of the working conditions of different short-circuit degrees and short-circuit positions of the rotor interturn short-circuit under the overexcitation state, and record and save the temperature data;

[0027] Execute steps 6 and 8 to complete the simulation of the working conditions of different short-circuit degrees and short-circuit positions of the rotor turn-to-turn short-circuit under the no-load running state, and record and save the temperature data;

[0028] Execute steps 7 and 8 to complete the simulation of the working conditions of different short-circuit degrees and short-circuit positions of the rotor turn-to-turn short-circuit under the under-excitation operation state, and record and save the temperature data;

[0029] After the simulation is completed, the DC excitation current is continuously reduced to the minimum, and then the circuit breaker S1 is disconnected, the synchronous phase regulator stops rotating, and the main power supply is disconnected.

[0030] Therefore, the present invention adopts the above-mentioned experimental simulation device and method for detecting the operating load capacity of a synchronous phase condenser, which has the following advantages:

[0031] In the present invention, a plurality of detection devices are provided for real-time monitoring of the state of the synchronous condenser, so as to facilitate the detection of the internal state of the synchronous condenser under different states. A short-circuit interface board is provided, and the simulation of different short-circuit faults can be quickly completed through the short-circuit wire. The operating state of the synchronous condenser can be adjusted by connecting a DC excitation power supply in series, and the operating state of the synchronous condenser under different working states can be quickly simulated, thereby detecting the carrying capacity of the synchronous condenser.

[0032] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is an overall schematic diagram of an experimental simulation device for detecting the operating load-bearing capacity of a synchronous phase condenser according to the present invention;

[0034] Figure 2 A schematic diagram of the connection of the rotor winding in an experimental simulation device for detecting the operating load capacity of a synchronous condenser according to the present invention;

[0035] Figure 3 A schematic diagram of stator winding connection in an experimental simulation device for detecting the operating load capacity of a synchronous condenser according to the present invention;

[0036] Figure 4 A schematic diagram of the installation position of a thermocouple in an experimental simulation device for detecting the operating load-bearing capacity of a synchronous condenser according to the present invention;

[0037] Figure 5 It is the installation position of the infrared detection probe in the experimental simulation device for detecting the operating load-bearing capacity of a synchronous phase condenser according to the present invention;

[0038] Figure 6 It is a schematic diagram of setting short-circuit joints according to percentages on rotor windings in an experimental simulation device for detecting the operating load capacity of a synchronous condenser according to the present invention;

[0039] Figure 7 A schematic diagram of the slope of the rotor winding and its short-circuit joint in an experimental simulation device for detecting the operating load-bearing capacity of a synchronous condenser according to the present invention;

[0040] Figure 8 A schematic diagram of a short-circuit wiring board in an experimental simulation device for detecting the operating load capacity of a synchronous phase condenser according to the present invention;

[0041] Figure numerals: 1. Power grid; 2. Three-phase voltage regulator; 3. Circuit breaker S1; 4. Electrically excited synchronous phase condenser; 5. Speed ​​sensor; 6. High-power resistor; 7. DC excitation power supply; 8. Circuit breaker S2; 9. Circuit breaker S3; 10. Three-phase electrical parameter analyzer; 11. Temperature inspection instrument; 12. Infrared probe digital display; 13. Infrared detection probe; 14. Thermocouple. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations. The specific model specifications need to be selected and determined according to the actual specifications of the device, and the specific selection calculation method adopts the existing technology in the field, so it will not be described in detail.

[0043] Example

[0044] like Figure 1-Figure 3 The present invention provides an experimental simulation device for detecting the operation carrying capacity of a synchronous condenser, comprising a power grid as an input end, a three-phase voltage regulator, a circuit breaker S1 and a stator winding of an electrically excited synchronous condenser connected in sequence behind the power grid, and a circuit breaker S1 is provided between the three-phase voltage regulator and the electrically excited synchronous condenser for safety and more convenient control of the on-off between the three-phase stator winding and the three-phase voltage regulator;

[0045] A short-circuit simulation device is provided on the rotor winding of the electrically excited synchronous phase condenser, and a detection device group is provided on the electrically excited synchronous phase condenser. Branch 1 and branch 2 are connected in series at the beginning and end of the rotor winding of the electrically excited synchronous phase condenser, and branch 1 and branch 2 are in a parallel relationship. Circuit breaker S2 and a DC excitation power supply are provided on branch 1, and circuit breaker S3 and a high-power resistor are provided on branch 2. The DC excitation power supply and the high-power resistor are in a parallel relationship. Because the electrically excited synchronous phase condenser selects an asynchronous starting mode, the rotor winding needs to be connected in series with a high-power resistor with a resistance of about 10 times its own resistance. The rotor winding is connected in series with the high-power resistor, and the on and off of the rotor winding and the high-power resistor are controlled by the circuit breaker.

[0046] The short-circuit simulation device includes a plurality of slip rings installed on the rotating shaft of the electrically excited synchronous condenser. Short-circuit joints are led out from the rotor winding according to different percentages of the short-circuit turns of the rotor winding to the total number of turns of the rotor winding coil. The plurality of short-circuit joints correspond to different slip ring connections. The slip ring is provided with a contact plate. The contact plate is connected to the slip ring so that the rotation process of the rotating shaft does not affect the electrical connection relationship. Different contact plates are connected to different interfaces in the short-circuit interface board. The short-circuit structure is led out to facilitate the simulation of short-circuit faults directly through the short-circuit line.

[0047] The detection device group includes a three-phase electrical parameter analyzer, a speed sensor, a temperature detection device and an infrared detection device;

[0048] The three-phase electrical parameter analyzer is connected to the stator winding in the electrically excited synchronous condenser to observe and record the voltage, current, active power, reactive power, apparent power, power factor angle, power factor and other data of the electrically excited synchronous condenser.

[0049] The speed sensor is installed on the rotor shaft of the electrically excited synchronous condenser to observe whether the speed of the electrically excited synchronous condenser is close to the synchronous speed.

[0050] The temperature detection device includes a temperature patrol meter, which is connected to a plurality of thermocouples, which are embedded in the stator winding and installed at a position such as Figure 4 As shown;

[0051] The infrared detection device includes an infrared probe digital display meter, and the infrared probe digital display meter is connected to an infrared detection probe, such as Figure 5 As shown, the infrared detection probe is pointed to the rotor in the electrically excited synchronous condenser through the bracket to measure the rotor temperature;

[0052] The temperature inspection instrument displays and records the temperature of the thermocouples at each position, and the infrared probe digital display records the temperature of the rotor.

[0053] An experimental simulation method for detecting the operating tolerance of a synchronous phase condenser, using the above experimental simulation device, comprises the following steps:

[0054] Step 1: Adjust the initial state of the equipment. For the three-phase voltage regulator, first adjust the three-phase voltage regulator to zero, keep the circuit breaker S1 in the disconnected state, and then adjust the three-phase voltage regulator knob to make the AC output voltage of the three-phase voltage regulator reach the rated voltage of the electro-magnetic synchronous condenser;

[0055] For the DC excitation power supply, close the circuit breaker S2, open the circuit breaker S3, start the DC excitation power supply, adjust the excitation current source output to the no-load rated excitation current, and then open the circuit breaker S2;

[0056] For the high-power resistor, close the circuit breaker S3, and select the asynchronous starting mode for the electrically excited synchronous condenser. A high-power resistor needs to be connected in series to the rotor winding of the electrically excited synchronous condenser. The resistance value of the high-power resistor is 10 times the resistance of the rotor winding coil.

[0057] Step 2: Close the circuit breaker S1, pass three-phase AC power into the stator winding, generate starting torque in the rotor winding, and the electrically excited synchronous condenser starts to run. Observe the value of the speed sensor, and the speed of the electrically excited synchronous condenser gradually accelerates to the rated speed;

[0058] Step 3: After reaching the rated speed, immediately close the circuit breaker S2, open the circuit breaker S3, and pass the rated DC excitation current into the rotor winding, so that the electrically excited synchronous condenser is pulled into synchronous speed operation;

[0059] Step 4: Adjust the DC excitation current to make the reactive power output of the electrically excited synchronous phase condenser zero; observe and record the data of the temperature inspection meter and the infrared probe digital display meter;

[0060] Step 5: In the overexcitation operation state, gradually increase the DC excitation current, and the three-phase current of the stator winding of the electrically excited synchronous condenser will increase accordingly until the stator winding current reaches the rated value. The phase difference between the stator current and voltage of the electrically excited synchronous condenser on the three-phase electrical parameter analyzer should be +90°, and the reactive power generated reaches the maximum value. At this time, it is the maximum overexcitation state, and the temperature data is recorded and saved;

[0061] Step 6: In the no-load operation state, the DC excitation current is continuously reduced, and the stator three-phase current will decrease accordingly until the stator winding current reaches the minimum value and is close to zero. At this time, the phase difference between the stator winding current and the voltage of the electrically excited synchronous condenser should be 0°, the reactive power is zero, the current and voltage of the stator winding are in phase, and the electrically excited synchronous condenser is in the no-load state. Keep running in the no-load state for a period of time, and record and save the temperature data;

[0062] Step 7: In the under-excitation operation state, continue to reduce the DC excitation current. At this time, the three-phase current of the stator winding of the electrically excited synchronous condenser increases until the stator winding current reaches the rated value. This is the maximum under-excitation operation state. The phase difference between the stator winding current and the voltage of the electrically excited synchronous condenser should be -90°. Keep the condenser running in the under-excitation state for a period of time, and record and save the temperature data.

[0063] Step 8: Use a short circuit simulation device to simulate a short circuit fault, such as Figure 6-Figure 7 , is a schematic diagram of the wiring layout. Different degrees of short-circuit faults are achieved by connecting different interfaces on the short-circuit wiring board through short-circuit wires, such as Figure 8 : is a schematic diagram of the short-circuit interface board. In this embodiment, a total of five short-circuit interfaces are set, which are respectively set in the rotor winding, namely interface L1: 0%, interface L2: 1%, interface L3: 2%, interface L4: 4% and interface L5: 100%. In the specific short-circuit fault simulation, the rotor turn-to-turn short-circuit 1% is completed by connecting the short-circuit interfaces L1 and L2, the rotor turn-to-turn short-circuit 2% is completed by connecting the short-circuit interfaces L1 and L3, the rotor turn-to-turn short-circuit 4% is completed by connecting the short-circuit interfaces L1 and L3, and the rotor turn-to-turn short-circuit 100% is completed by connecting the short-circuit interfaces L1 and L5; the rotor turn-to-turn short-circuit 2% is simulated at different short-circuit positions, which is completed by connecting the short-circuit interfaces L1 and L3 and the short-circuit interfaces L4 and L3 respectively.

[0064] Step 9: The simulation process of different working conditions is as follows:

[0065] Execute steps 5 and 8 to complete the simulation of the working conditions of different short-circuit degrees and short-circuit positions of the rotor interturn short-circuit under the overexcitation state, and record and save the temperature data;

[0066] Execute steps 6 and 8 to complete the simulation of the working conditions of different short-circuit degrees and short-circuit positions of the rotor turn-to-turn short-circuit under the no-load running state, and record and save the temperature data;

[0067] Execute steps 7 and 8 to complete the simulation of the working conditions of different short-circuit degrees and short-circuit positions of the rotor turn-to-turn short-circuit under the under-excitation operation state, and record and save the temperature data;

[0068] After the simulation is completed, the DC excitation current is continuously reduced to the minimum, and then the circuit breaker S1 is disconnected to stop the phase regulator and disconnect the main power supply.

[0069] Therefore, the present invention adopts an experimental simulation device and method for detecting the operating carrying capacity of a synchronous condenser. The operating state of the synchronous condenser is monitored in real time by a detection device, and a short-circuit simulation device is set. Through this device, the influence of short-circuit faults of different degrees on the operation of the synchronous condenser can be simulated by only short-circuiting. A DC excitation power supply is also provided, which can adjust the DC in the rotor winding. By adjusting the current, the operating state of the synchronous condenser can be adjusted to a no-load operating state, an over-excited operating state or an under-excited operating state. Through the above-mentioned device, the internal state of the synchronous condenser when short-circuit faults of different degrees occur in the synchronous condenser under different operating states can be simulated.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A simulation method for an experimental simulation device for detecting the operating load capacity of a synchronous condenser, characterized in that: The device used for experimental simulation includes a power grid as a total input end, a three-phase voltage regulator, a circuit breaker S1 and a stator winding of an electrically excited synchronous condenser are sequentially connected to the power grid, a short-circuit simulation device is provided on the rotor winding of the electrically excited synchronous condenser, a detection device group is provided on the electrically excited synchronous condenser, a branch 1 and a branch 2 are connected in series at the beginning and the end of the rotor winding of the electrically excited synchronous condenser, the branch 1 and the branch 2 are in parallel relationship, the branch 1 is provided with a circuit breaker S2 and a DC excitation power supply, the branch 2 is provided with a circuit breaker S3 and a high-power resistor, and the DC excitation power supply and the high-power resistor are in parallel relationship; The detection device group includes a three-phase electrical parameter analyzer, a speed sensor, a temperature detection device and an infrared detection device; The three-phase electrical parameter analyzer is connected to the stator winding in the electrically excited synchronous condenser; The speed sensor is installed on the rotating shaft of the rotor in the electrically excited synchronous condenser; The temperature detection device includes a temperature patrol meter, which is connected to a plurality of thermocouples, and the plurality of thermocouples are embedded in the stator winding; The infrared detection device comprises an infrared probe digital display, the infrared probe digital display is connected to an infrared detection probe, and the infrared detection probe is pointed to the rotor in the electrically excited synchronous condenser through a bracket; The temperature inspection instrument displays and records the temperature of the thermocouples at each position, and the infrared probe digital display records the rotor temperature; A simulation method of an experimental simulation device for detecting the operation carrying capacity of a synchronous phase condenser, comprising the following steps: Step 1: Adjust the initial state of the equipment. For the three-phase voltage regulator, first adjust the three-phase voltage regulator to zero and keep the circuit breaker S1 in the disconnected state, then adjust the three-phase voltage regulator knob to make the AC output voltage of the three-phase voltage regulator reach the rated voltage of the electro-excitation synchronous phase condenser; For the DC excitation power supply, close the circuit breaker S2, open the circuit breaker S3, start the DC excitation power supply, adjust the excitation current source output to the no-load rated excitation current, and then open the circuit breaker S2; For the high-power resistor, close the circuit breaker S3 and connect a high-power resistor in series to the rotor winding of the electrically excited synchronous condenser. The resistance value of the high-power resistor is 10 times the resistance of the rotor winding coil. Step 2: Close the circuit breaker S1, pass three-phase AC power into the stator winding, generate starting torque in the rotor winding, and the electrically excited synchronous condenser starts to run. Observe the value of the speed sensor, and the speed of the electrically excited synchronous condenser gradually accelerates to the rated speed; Step 3: After reaching the rated speed, immediately close the circuit breaker S2, open the circuit breaker S3, and pass the rated DC excitation current into the rotor winding, so that the electrically excited synchronous condenser is pulled into synchronous speed operation; Step 4: Adjust the DC excitation current to make the reactive power output of the electrically excited synchronous phase condenser zero, and observe and record the data of the temperature inspection meter and the infrared probe digital display meter; Step 5: In the overexcitation operation state, the DC excitation current is gradually increased, and the three-phase current of the stator winding of the electrically excited synchronous condenser will increase accordingly until the stator winding current reaches the rated value. The phase difference between the stator current and the voltage of the electrically excited synchronous condenser on the three-phase electrical parameter analyzer is +90°, and the reactive power generated reaches the maximum value. At this time, it is the maximum overexcitation state, and the temperature data is recorded and saved; Step 6: In the no-load operation state, the DC excitation current is continuously reduced, and the three-phase current of the stator winding will decrease accordingly until the stator winding current reaches the minimum value and is close to zero. At this time, the phase difference between the stator winding current and the voltage of the electrically excited synchronous condenser is 0°, the reactive power is zero, the current and voltage of the stator winding are in phase, and the electrically excited synchronous condenser is in the no-load state. Keep running in the no-load state for a period of time, and record and save the temperature data; Step 7: In the under-excitation operation state, the DC excitation current continues to be reduced. At this time, the three-phase current of the stator winding of the electrically excited synchronous condenser increases instead, until the stator winding current reaches the rated value. At this time, it is the maximum under-excitation operation state. The phase difference between the stator winding current and the voltage of the electrically excited synchronous condenser is -90°. Keep the synchronous condenser running in the under-excitation state for a period of time, and record and save the temperature data; Step 8: Use a short-circuit simulation device to simulate a short-circuit fault, and connect different interfaces on the short-circuit wiring board through short-circuit wires to achieve short-circuit faults of different degrees; Step 9: The simulation process of different working conditions is as follows: Execute steps 5 and 8 to complete the simulation of the working conditions of different short-circuit degrees and short-circuit positions of the rotor turn-to-turn short-circuit under the overexcitation state, and record and save the temperature data; Execute steps 6 and 8 to complete the simulation of the rotor turn-to-turn short circuit with different short circuit degrees and short circuit position conditions in the no-load operation state, and record and save the temperature data; Execute steps 7 and 8 to complete the simulation of the working conditions of different short-circuit degrees and short-circuit positions of the rotor inter-turn short-circuit under the under-excitation operation state, and record and save the temperature data; After the simulation is completed, the DC excitation current is continuously reduced to the minimum, and then the circuit breaker S1 is disconnected, the synchronous phase regulator stops rotating, and the main power supply is disconnected.

2. The simulation method of the experimental simulation device for detecting the operation carrying capacity of a synchronous condenser according to claim 1 is characterized in that: The short-circuit simulation device includes a plurality of slip rings installed on the rotating shaft of the electrically excited synchronous condenser. Short-circuit joints are led out from the rotor winding according to different percentages of the short-circuit turns of the rotor winding to the total number of turns of the rotor winding coil. The plurality of short-circuit joints correspond to different connections of the slip rings. The slip rings are provided with contact plates, and different contact plates are connected to different interfaces in the short-circuit interface plate.

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