CN111060771A - Relay protection and automatic calibration system with analog load - Google Patents
Relay protection and automatic calibration system with analog load Download PDFInfo
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- CN111060771A CN111060771A CN201911412822.XA CN201911412822A CN111060771A CN 111060771 A CN111060771 A CN 111060771A CN 201911412822 A CN201911412822 A CN 201911412822A CN 111060771 A CN111060771 A CN 111060771A
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
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Abstract
The invention discloses a relay protection and automation belt simulation load verification system. The method belongs to the technical field of relay protection and automatic on-load verification, three-phase primary through-flow and primary voltage tests are carried out before engineering starting and production, and simulated primary current and primary voltage are applied for inspection and judgment. The three-phase primary current and voltage testing device comprises an electric primary circuit, a three-phase primary current and voltage testing device E01, a relay protection automation device R02 and a current differential protection R01; the electric primary circuit comprises a bus, a current transformer 101, a current transformer 102, a current transformer 201, a current transformer 202, a voltage transformer 300, a switch K1, a switch K2, a switch K3, a test interval point L1 and a test interval point L2; the first end of the current transformer 101, the first end of the current transformer 201 and one end of the switch K3 are all connected to the bus.
Description
Technical Field
The invention belongs to the technical field of relay protection and automatic on-load verification, and particularly relates to a relay protection and automatic on-load simulation verification system.
Background
The relay protection and power grid safety automatic device has the problems of phase difference, phase, transformation ratio and polarity of a current-voltage loop of the relay protection and automatic system accessed in the construction debugging stage. Therefore, a safe and efficient relay protection and automation system with simulation load calibration is designed, and the problem that a current-voltage loop of the relay protection and automation system is accessed before engineering starting and production is very necessary.
Disclosure of Invention
The invention aims to solve the problems of phase difference, phase, transformation ratio and polarity of a current-voltage loop of a relay protection and automation system accessed in a construction debugging stage, and provides a relay protection and automation belt simulation load verification system, which is used for developing a three-phase primary through-flow and primary voltage test before starting and putting into production of an engineering, and applying a simulated primary current and a simulated primary voltage for inspection and judgment; checking a relay protection and an automatic system with an analog load through primary current and primary voltage, checking and judging whether the phase, the phase relation and the protected direction of current and voltage accessed to the current protection, the distance protection and the like with the direction are correct, checking and judging whether the relative polarity relation and the transformation ratio of each group of current loops connected to a protection loop by the current differential protection are correct, checking and judging whether the phase, the transformation ratio and the polarity of the current and voltage accessed by a measurement and metering system are correct, checking and judging whether the wiring of each group of mutual inductors is correct and whether the circuit wiring is firm; by processing the problems of access relay protection and a current-voltage loop of an automatic system exposed by three-phase primary through-flow and primary voltage-passing tests, the engineering construction debugging quality is ensured, the relay protection and the automatic system on-load check work are smoothly carried out in the engineering starting stage, and the engineering starting operation is guaranteed to be excellent at one time.
The technical problem is solved by the following technical scheme:
the relay protection and automation belt simulation load verification system comprises an electric primary circuit, a three-phase primary through-current and primary through-voltage test device E01, a relay protection automation device R02 and a current differential protection R01;
the electric primary circuit comprises a bus, a current transformer 101, a current transformer 102, a current transformer 201, a current transformer 202, a voltage transformer 300, a switch K1, a switch K2, a switch K3, a test interval point L1 and a test interval point L2; the first end of the current transformer 101, the first end of the current transformer 201 and one end of the switch K3 are all connected to a bus; the second end of the current transformer 101 is connected to one end of a switch K1, the other end of the switch K1 is connected to the first end of the current transformer 102, and the second end of the current transformer 102 is connected to a test interval point L1; the second end of the current transformer 201 is connected to one end of a switch K2, the other end of the switch K2 is connected to the first end of the current transformer 202, and the second end of the current transformer 202 is connected to a test interval point L2; the other end of the switch K3 is connected to the first end of the voltage transformer 300, and the second end and the third end of the voltage transformer 300 are both connected to the ground terminal E;
the three-phase primary through-current and primary through-voltage testing device E01 comprises three-phase large-current output terminals and three-phase high-voltage output terminals, wherein the second ends of a first group of terminals on the three-phase large-current output terminals are connected to a test interval point L1, the second ends of a second group of terminals on the three-phase large-current output terminals are connected to a test interval point L2, and the second ends of the three-phase high-voltage output terminals are connected to the first end of a voltage transformer 300; the ground wire of the three-phase primary through-current and primary through-voltage testing device E01 is connected to the grounding end E;
the relay protection automation device R02 comprises a three-phase current input terminal and a three-phase voltage input terminal, the third end of the current transformer 101 is connected to the second end of the three-phase current input terminals of the relay protection automation device R02, and the third end and the fourth end of the voltage transformer 300 are respectively connected to the first end and the third end of the three-phase voltage input terminals of the relay protection automation device R02; the ground wire of the relay protection automation device R02 is connected to the grounding end E;
the current differential protection R01 comprises a three-phase current input terminal and a three-phase voltage input terminal;
the current differential protection R01 comprises a three-phase current input terminal and a three-phase voltage input terminal, the third end of the current transformer 102 is connected to the second end of the first group of the three-phase current input terminals of the current differential protection R01, the third end of the current transformer 202 is connected to the second end of the second group of the three-phase current input terminals of the current differential protection R01, and the third end and the fourth end of the voltage transformer 300 are respectively connected to the first end and the third end of the three-phase voltage input terminals of the current differential protection R01; the ground line of the current differential protection R01 is connected to the ground terminal E.
The three-phase primary through-current and primary through-voltage testing device E01 is a device for synchronously outputting three-phase primary voltage and primary current; the current transformer 101, the current transformer 102, the current transformer 201 and the current transformer 202 are devices for converting the current of the power system to provide the measuring current for the measuring instrument and the relay protection device; the voltage transformer 300 is a device for converting the voltage of the power system to provide the measurement voltage for the measurement instrument and the relay protection device; the relay protection automation device R02 is a complete equipment capable of sending warning signals to operators on duty in time or directly sending tripping commands to controlled circuit breakers to terminate an automation measure for the development of events when the power elements (such as generators, circuits, etc.) in the power system or the power system itself have faults and endanger the safe operation of the power system, and is an equipment integrating multiple functions of metering, measuring, controlling, monitoring, communicating, event recording, fault recording and misoperation preventing of the power system elements;
the current differential protection R01 is a relay protection device which works by utilizing kirchhoff current theorem and is manufactured according to the principle that the sum of currents flowing into nodes in a circuit is equal to zero.
The relay protection and automation belt simulation load calibration system is characterized in that three-phase primary through-flow and primary through-pressure tests are carried out before engineering starting operation, and three-phase primary current and primary voltage are applied to enable a system relay protection and automation device to carry out simulation load so as to truly reflect the configuration and connection conditions of a system transformer.
Checking whether the wiring of each group of mutual inductors is correct and whether the circuit wiring is firm, checking and judging whether the phase, the phase relation, the transformation ratio and the protected direction of the accessed current-voltage circuit are correct, finding and solving the problems of the accessed relay protection and the current-voltage circuit of the automatic system in the debugging stage, drawing a hexagonal diagram of test data, and comparing the test data with the monitoring data of the comprehensive automatic system;
the method has the advantages of comprehensively and objectively evaluating the operation condition of the engineering relay protection and integrated automation system, having high test efficiency and good accuracy, ensuring the debugging quality of engineering construction, ensuring the smooth development of the relay protection and the on-load check work of the automation system in the engineering starting stage, and creating a good foundation for realizing one-time excellent project starting and production.
The relay protection and automatic belt simulation load calibration system is used for carrying out three-phase primary through-flow and primary voltage tests before engineering starting operation, and testing and judging by applying simulated primary current and voltage. The method comprises the steps of checking and judging whether the phase, the phase relation and the protected direction of current and voltage accessed to a relay protection and automation system with analog load are correct or not through primary current and primary voltage, checking and judging whether the relative polarity relation and the transformation ratio of each group of current loops connected to a protection loop by current differential protection are correct or not, checking and judging whether the phase, the transformation ratio and the polarity of the current and voltage accessed by a measurement and metering system are correct or not, checking and judging whether the wiring of each group of mutual inductors is correct or not and whether the circuit wiring is firm or not. By processing the problems of access relay protection and a current-voltage loop of an automatic system exposed by three-phase primary through-flow and primary voltage-passing tests, the engineering construction debugging quality is ensured, the relay protection and the automatic system on-load check work are smoothly carried out in the engineering starting stage, and the engineering starting operation is guaranteed to be excellent at one time.
Preferably, the operation state of the system equipment is adjusted, the voltage transformer 300 is isolated from the system bus, the interval to be tested of the system is selected (taking any intervals L1 and L2 in the system as examples), the three-phase primary through-current and primary through-voltage testing device E01 is connected to the interval to be tested of the system, wherein, the three-phase primary current output end of the three-phase primary current and voltage test device E01 is respectively connected with a test interval L1 and a test interval L2 in the system, a closed primary loop is formed through a system bus, a three-phase primary voltage output end of a three-phase primary current and primary voltage test device E01 is connected with a primary side of a voltage transformer 300, a synchronous output current voltage value of the three-phase primary current and primary voltage test device E01 is adjusted, and a secondary current is generated in a current loop connected with the relay protection automation device by the current transformers (101, 102, 201 and 202) sensing the current of the system primary loop; the primary winding of the voltage transformer 300 generates a secondary voltage in a voltage loop connected to the relay protection automation device due to the high voltage, and the relay protection automation device carries an analog load.
Preferably, the mutual phase and amplitude of the current and the voltage accessed by the relay protection automation device R02 are checked to judge the wiring and the polarity of a current-voltage loop accessed by the relay protection automation device R02 and the correctness of the transformation ratio of the mutual inductor.
Preferably, the mutual phase and amplitude of the current-voltage circuit connected to the current differential protection R01 are verified, and the connection, polarity and transformer transformation ratio of the current-voltage circuit connected to the current differential protection R01 are determined for the phase of each current transformer of the current differential protection R01 and the differential current in the differential circuit.
Preferably, the R02 belt simulation load verification system and the current differential protection R01 belt simulation load verification system deal with the problem of access relay protection and a current-voltage loop of an automation system exposed by a simulation load test, so as to ensure that the current-voltage wiring of the device meets the requirements of the working principle, design and operation of the device, and the final test result is obtained and then the test is finished.
Preferably, the solution strategy of relay protection and automatic belt simulation load verification is as follows:
1) the engineering debugging enters a stage before completion and acceptance check, three-phase primary through-flow and primary through-pressure tests are carried out on the engineering, and a system relay protection and automation device carries out simulation load;
2) adjusting the running state of system equipment to isolate a voltage transformer from a system bus, selecting a to-be-tested interval of the system (taking any intervals L1 and L2 in the system as examples), and connecting a three-phase primary through-current and primary through-voltage testing device to the to-be-tested interval of the system;
3) and adjusting the synchronous output current and voltage values of the three-phase primary through-flow and primary through-voltage testing device E01 to enable the relay protection and automation device to carry a simulation load, finding and solving the problems of the current and voltage circuit of the relay protection and automation system connected in the debugging stage, and verifying the mutual phase and amplitude of the current and voltage circuit connected with the relay protection and automation device.
The invention can achieve the following effects:
the relay protection and automatic belt simulation load calibration system of the invention develops a three-phase primary through-flow and primary voltage test before starting engineering production, and uses simulated primary current and primary voltage for inspection and judgment. The method comprises the steps of checking and judging whether the phase, the phase relation and the protected direction of current and voltage accessed to a relay protection and automation system with analog load are correct or not through primary current and primary voltage, checking and judging whether the relative polarity relation and the transformation ratio of each group of current loops connected to a protection loop by current differential protection are correct or not, checking and judging whether the phase, the transformation ratio and the polarity of the current and voltage accessed by a measurement and metering system are correct or not, checking and judging whether the wiring of each group of mutual inductors is correct or not and whether the circuit wiring is firm or not. By processing the problems of access relay protection and a current-voltage loop of an automatic system exposed by three-phase primary through-flow and primary voltage-passing tests, the engineering construction debugging quality is ensured, the relay protection and the automatic system on-load check work are smoothly carried out in the engineering starting stage, the engineering starting operation is guaranteed to be excellent at one time, and the reliability is high.
Drawings
FIG. 1 is a schematic diagram of an electrical primary system of the present invention.
FIG. 2 is a test wiring diagram of the present invention.
Fig. 3 is a schematic diagram of the relay protection automation belt simulation load verification of the invention.
FIG. 4 is a schematic diagram of the current differential guardband simulated load verification of the present invention.
Detailed Description
The invention is further described with reference to the following figures and examples.
The relay protection and automation belt simulation load verification system comprises an electric primary circuit, a three-phase primary through-current and primary voltage testing device E01, a relay protection automation device R02 and a current differential protection R01, wherein the electric primary circuit is connected with the relay protection and automation belt simulation load verification system and is shown in FIGS. 1-4;
the electric primary circuit comprises a bus, a current transformer 101, a current transformer 102, a current transformer 201, a current transformer 202, a voltage transformer 300, a switch K1, a switch K2, a switch K3, a test interval point L1 and a test interval point L2; the first end of the current transformer 101, the first end of the current transformer 201 and one end of the switch K3 are all connected to a bus; the second end of the current transformer 101 is connected to one end of a switch K1, the other end of the switch K1 is connected to the first end of the current transformer 102, and the second end of the current transformer 102 is connected to a test interval point L1; the second end of the current transformer 201 is connected to one end of a switch K2, the other end of the switch K2 is connected to the first end of the current transformer 202, and the second end of the current transformer 202 is connected to a test interval point L2; the other end of the switch K3 is connected to the first end of the voltage transformer 300, and the second end and the third end of the voltage transformer 300 are both connected to the ground terminal E;
the three-phase primary through-current and primary through-voltage testing device E01 comprises three-phase large-current output terminals and three-phase high-voltage output terminals, wherein the second ends of a first group of terminals on the three-phase large-current output terminals are connected to a test interval point L1, the second ends of a second group of terminals on the three-phase large-current output terminals are connected to a test interval point L2, and the second ends of the three-phase high-voltage output terminals are connected to the first end of a voltage transformer 300; the ground wire of the three-phase primary through-current and primary through-voltage testing device E01 is connected to the grounding end E;
the relay protection automation device R02 comprises a three-phase current input terminal and a three-phase voltage input terminal, the third end of the current transformer 101 is connected to the second end of the three-phase current input terminals of the relay protection automation device R02, and the third end and the fourth end of the voltage transformer 300 are respectively connected to the first end and the third end of the three-phase voltage input terminals of the relay protection automation device R02; the ground wire of the relay protection automation device R02 is connected to the grounding end E;
the current differential protection R01 comprises a three-phase current input terminal and a three-phase voltage input terminal;
the current differential protection R01 comprises a three-phase current input terminal and a three-phase voltage input terminal, the third end of the current transformer 102 is connected to the second end of the first group of the three-phase current input terminals of the current differential protection R01, the third end of the current transformer 202 is connected to the second end of the second group of the three-phase current input terminals of the current differential protection R01, and the third end and the fourth end of the voltage transformer 300 are respectively connected to the first end and the third end of the three-phase voltage input terminals of the current differential protection R01; the ground line of the current differential protection R01 is connected to the ground terminal E.
The three-phase primary through-current and primary through-voltage testing device E01 is a device for synchronously outputting three-phase primary voltage and primary current; the current transformer 101, the current transformer 102, the current transformer 201 and the current transformer 202 are devices for converting the current of the power system to provide the measuring current for the measuring instrument and the relay protection device; the voltage transformer 300 is a device for converting the voltage of the power system to provide the measurement voltage for the measurement instrument and the relay protection device; the relay protection automation device R02 is a complete equipment capable of sending warning signals to operators on duty in time or directly sending tripping commands to controlled circuit breakers to terminate an automation measure for the development of events when the power elements (such as generators, circuits, etc.) in the power system or the power system itself have faults and endanger the safe operation of the power system, and is an equipment integrating multiple functions of metering, measuring, controlling, monitoring, communicating, event recording, fault recording and misoperation preventing of the power system elements;
the current differential protection R01 is a relay protection device which works by utilizing kirchhoff current theorem and is manufactured according to the principle that the sum of currents flowing into nodes in a circuit is equal to zero.
The relay protection and automation belt simulation load calibration system is characterized in that three-phase primary through-flow and primary through-pressure tests are carried out before engineering starting operation, and three-phase primary current and primary voltage are applied to enable a system relay protection and automation device to carry out simulation load so as to truly reflect the configuration and connection conditions of a system transformer.
Checking whether the wiring of each group of mutual inductors is correct and whether the circuit wiring is firm, checking and judging whether the phase, the phase relation, the transformation ratio and the protected direction of the accessed current-voltage circuit are correct, finding and solving the problems of the accessed relay protection and the current-voltage circuit of the automatic system in the debugging stage, drawing a hexagonal diagram of test data, and comparing the test data with the monitoring data of the comprehensive automatic system;
the method has the advantages of comprehensively and objectively evaluating the operation condition of the engineering relay protection and integrated automation system, having high test efficiency and good accuracy, ensuring the debugging quality of engineering construction, ensuring the smooth development of the relay protection and the on-load check work of the automation system in the engineering starting stage, and creating a good foundation for realizing one-time excellent project starting and production.
Adjusting the running state of system equipment to isolate the voltage transformer 300 from a system bus, selecting a to-be-tested interval of the system (taking any intervals L1 and L2 in the system as examples), connecting a three-phase primary through-current and primary through-voltage testing device E01 to the to-be-tested interval of the system, wherein, the three-phase primary current output end of the three-phase primary current and voltage test device E01 is respectively connected with a test interval L1 and a test interval L2 in the system, a closed primary loop is formed through a system bus, a three-phase primary voltage output end of a three-phase primary current and primary voltage test device E01 is connected with a primary side of a voltage transformer 300, a synchronous output current voltage value of the three-phase primary current and primary voltage test device E01 is adjusted, and a secondary current is generated in a current loop connected with the relay protection automation device by the current transformers (101, 102, 201 and 202) sensing the current of the system primary loop; the primary winding of the voltage transformer 300 generates a secondary voltage in a voltage loop connected to the relay protection automation device due to the high voltage, and the relay protection automation device carries an analog load.
The mutual phase and amplitude of the current and the voltage accessed by the relay protection automation device R02 are checked to judge the wiring, the polarity and the transformer transformation ratio correctness of the current and voltage loop accessed by the relay protection automation device R02.
The mutual phase and amplitude of the current-voltage loop connected with the current differential protection R01 are verified, and the wiring, polarity and transformer transformation ratio correctness of the current-voltage loop connected with the current differential protection R01 are judged according to the phase of each current transformer of the current differential protection R01 and the differential current in the differential loop.
The R02 belt simulation load checking system and the current differential protection R01 belt simulation load checking system are used for processing the problem of a current-voltage loop which is exposed by a simulation load test and is connected with a relay protection and an automation system, so that the current-voltage wiring of the device is ensured to meet the requirements of the working principle, design and operation of the device, and the final test result is obtained and then the test is finished.
The solving strategy of relay protection and automatic belt simulation load verification is as follows:
1) the engineering debugging enters a stage before completion and acceptance check, three-phase primary through-flow and primary through-pressure tests are carried out on the engineering, and a system relay protection and automation device carries out simulation load;
2) adjusting the running state of system equipment to isolate a voltage transformer from a system bus, selecting a to-be-tested interval of the system (taking any intervals L1 and L2 in the system as examples), and connecting a three-phase primary through-current and primary through-voltage testing device to the to-be-tested interval of the system;
3) and adjusting the synchronous output current and voltage values of the three-phase primary through-flow and primary through-voltage testing device E01 to enable the relay protection and automation device to carry a simulation load, finding and solving the problems of the current and voltage circuit of the relay protection and automation system connected in the debugging stage, and verifying the mutual phase and amplitude of the current and voltage circuit connected with the relay protection and automation device.
The relay protection and automatic belt simulation load calibration system is used for carrying out three-phase primary through-flow and primary voltage tests before engineering starting operation, and testing and judging by applying simulated primary current and voltage. The method comprises the steps of checking and judging whether the phase, the phase relation and the protected direction of current and voltage accessed to a relay protection and automation system with analog load are correct or not through primary current and primary voltage, checking and judging whether the relative polarity relation and the transformation ratio of each group of current loops connected to a protection loop by current differential protection are correct or not, checking and judging whether the phase, the transformation ratio and the polarity of the current and voltage accessed by a measurement and metering system are correct or not, checking and judging whether the wiring of each group of mutual inductors is correct or not and whether the circuit wiring is firm or not. The problem of the current and voltage loop connected into the relay protection and automation system and exposed by three-phase primary through-current and primary voltage test is solved.
The invention starts a pre-production stage at the later stage of engineering construction debugging, develops and implements a relay protection and automation belt simulation load calibration system, and enables the system relay protection and automation belt simulation load to truly reflect the configuration and the connection condition of a system transformer through three-phase primary through-flow and primary through-pressure tests. Whether the wiring of each group of transformers (including standby windings) is correct and the circuit wiring is firm or not is checked, whether the phase, the phase relation, the transformation ratio and the protected direction of the accessed current-voltage circuit are correct or not is checked and judged, the problems of the current-voltage circuit of the relay protection and the automatic system accessed in the debugging stage are found and solved, the test data can be drawn in a hexagonal diagram and compared with the monitoring data of the comprehensive automatic system, the running conditions of the relay protection and the comprehensive automatic system of the engineering are comprehensively and objectively evaluated, the test efficiency is high, the accuracy is good, the engineering construction debugging quality is guaranteed, the relay protection and the automatic system with load checking work in the engineering starting stage are smoothly carried out, and a good foundation is created for realizing the once excellent engineering starting and production.
The embodiments of the present invention have been described above with reference to the accompanying drawings, but the implementation is not limited to the above-described embodiments, and those skilled in the art can make various changes or modifications within the scope of the appended claims.
Claims (5)
1. The relay protection and automation belt simulation load verification system is characterized by comprising an electric primary circuit, a three-phase primary through-current and primary through-voltage test device E01, a relay protection automation device R02 and a current differential protection R01;
the electric primary circuit comprises a bus, a current transformer 101, a current transformer 102, a current transformer 201, a current transformer 202, a voltage transformer 300, a switch K1, a switch K2, a switch K3, a test interval point L1 and a test interval point L2; the first end of the current transformer 101, the first end of the current transformer 201 and one end of the switch K3 are all connected to a bus; the second end of the current transformer 101 is connected to one end of a switch K1, the other end of the switch K1 is connected to the first end of the current transformer 102, and the second end of the current transformer 102 is connected to a test interval point L1; the second end of the current transformer 201 is connected to one end of a switch K2, the other end of the switch K2 is connected to the first end of the current transformer 202, and the second end of the current transformer 202 is connected to a test interval point L2; the other end of the switch K3 is connected to the first end of the voltage transformer 300, and the second end and the third end of the voltage transformer 300 are both connected to the ground terminal E;
the three-phase primary through-current and primary through-voltage testing device E01 comprises three-phase large-current output terminals and three-phase high-voltage output terminals, wherein the second ends of a first group of terminals on the three-phase large-current output terminals are connected to a test interval point L1, the second ends of a second group of terminals on the three-phase large-current output terminals are connected to a test interval point L2, and the second ends of the three-phase high-voltage output terminals are connected to the first end of a voltage transformer 300; the ground wire of the three-phase primary through-current and primary through-voltage testing device E01 is connected to the grounding end E;
the relay protection automation device R02 comprises a three-phase current input terminal and a three-phase voltage input terminal, the third end of the current transformer 101 is connected to the second end of the three-phase current input terminals of the relay protection automation device R02, and the third end and the fourth end of the voltage transformer 300 are respectively connected to the first end and the third end of the three-phase voltage input terminals of the relay protection automation device R02; the ground wire of the relay protection automation device R02 is connected to the grounding end E;
the current differential protection R01 comprises a three-phase current input terminal and a three-phase voltage input terminal;
the current differential protection R01 comprises a three-phase current input terminal and a three-phase voltage input terminal, the third end of the current transformer 102 is connected to the second end of the first group of the three-phase current input terminals of the current differential protection R01, the third end of the current transformer 202 is connected to the second end of the second group of the three-phase current input terminals of the current differential protection R01, and the third end and the fourth end of the voltage transformer 300 are respectively connected to the first end and the third end of the three-phase voltage input terminals of the current differential protection R01; the ground line of the current differential protection R01 is connected to the ground terminal E.
2. The relay protection and automation load verification system with simulation as claimed in claim 1, adjusting the operation status of the system equipment to isolate the voltage transformer 300 from the system bus, selecting the interval to be tested of the system, connecting the three-phase primary through-current and primary through-voltage testing device E01 to the interval to be tested of the system, wherein, the three-phase primary current output end of the three-phase primary current and voltage test device E01 is respectively connected with a test interval L1 and a test interval L2 in the system, a closed primary loop is formed through a system bus, a three-phase primary voltage output end of a three-phase primary current and primary voltage test device E01 is connected with a primary side of a voltage transformer 300, a synchronous output current voltage value of the three-phase primary current and primary voltage test device E01 is adjusted, and a secondary current is generated in a current loop connected with the relay protection automation device by the current transformers (101, 102, 201 and 202) sensing the current of the system primary loop; the primary winding of the voltage transformer 300 generates a secondary voltage in a voltage loop connected to the relay protection automation device due to the high voltage, and the relay protection automation device carries an analog load.
3. The relay protection and automation belt analog load verification system of claim 1, wherein the mutual phase and amplitude of the current and voltage accessed by the relay protection automation device R02 are checked to determine the correctness of the wiring, polarity and transformer transformation ratio of the current and voltage loop accessed by the relay protection automation device R02.
4. The relay protection and automation belt analog load verification system of claim 1, wherein mutual phase and amplitude of the current-voltage loop connected with the current differential protection R01 are verified, and the correctness of connection, polarity and transformer transformation ratio of the current-voltage loop connected with the current differential protection R01 is determined according to the phase of each current transformer in each group of the current differential protection R01 and the differential current in the differential loop.
5. The relay protection and automation belt analog load verification system of claim 1, wherein the solution strategy of relay protection and automation belt analog load verification is:
1) the engineering debugging enters a stage before completion and acceptance check, three-phase primary through-flow and primary through-pressure tests are carried out on the engineering, and a system relay protection and automation device carries out simulation load;
2) adjusting the running state of system equipment to isolate a voltage transformer from a system bus, selecting a to-be-tested interval of the system, and connecting a three-phase primary through-flow and primary through-pressure test device to the to-be-tested interval of the system;
3) and adjusting the synchronous output current and voltage values of the three-phase primary through-flow and primary through-voltage testing device E01 to enable the relay protection and automation device to carry a simulation load, finding and solving the problems of the current and voltage circuit of the relay protection and automation system connected in the debugging stage, and verifying the mutual phase and amplitude of the current and voltage circuit connected with the relay protection and automation device.
Priority Applications (1)
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