CN111060771B - Relay protection and automatic on-load simulation verification system - Google Patents
Relay protection and automatic on-load simulation verification system Download PDFInfo
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- CN111060771B CN111060771B CN201911412822.XA CN201911412822A CN111060771B CN 111060771 B CN111060771 B CN 111060771B CN 201911412822 A CN201911412822 A CN 201911412822A CN 111060771 B CN111060771 B CN 111060771B
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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 automatic on-load simulation verification system. The method belongs to the technical field of relay protection and automatic on-load verification, and aims to develop three-phase primary through-flow and primary through-voltage tests before starting and putting into production in engineering, and apply simulated primary current and primary voltage for verification and judgment. The device 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 bar.
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 problems of the relay protection and the current-voltage loop of the automatic system, the phase, the transformation ratio and the polarity of the relay protection and the automatic system are solved when the relay protection and the automatic power grid safety device is connected in the construction debugging stage. Therefore, the design of the safe and efficient relay protection and automatic on-load simulation verification system is very necessary to deal with the problem of the current-voltage loop of the relay protection and automation system connected to before the project start-up and production-operation.
Disclosure of Invention
The invention aims to solve the problems of the phase, the transformation ratio and the polarity of a current-voltage loop connected into a relay protection and automation system in a construction debugging stage, and provides a relay protection and automation load simulation verification system, which is used for carrying out three-phase primary through-flow and primary through-voltage tests before starting and putting into production of engineering, and applying simulated primary current and primary voltage for verification and judgment; checking the relay protection and the automatic system with analog load through primary current and primary voltage, checking and judging whether the phase relation and the phase relation of the current and voltage connected to the current protection, the distance protection and the like in the tape direction and the protected direction are correct, checking and judging whether the relative polarity relation and the transformation ratio of each group of current loops connected to the protection loops of the current differential protection are correct, checking and judging whether the phase relation, the transformation ratio and the polarity of the current and voltage connected to the measuring and metering system are correct, and checking and judging whether the wiring of each group of mutual inductors is correct and whether the loop connection is firm; by processing the problems of three-phase primary through-flow and the current-voltage loop of the relay protection and automation system exposed by the primary through-pressure test, the engineering construction debugging quality is ensured, the relay protection and the on-load verification work of the automation system in the engineering starting stage are ensured to be smoothly carried out, and the engineering starting production is ensured to be optimal once.
The technical problems are solved by the following technical proposal:
The relay protection and automation on-load simulation 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; a 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 a first end of the current transformer 202, and a 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 grounding end E;
The three-phase primary through-current and primary through-voltage test device E01 comprises a three-phase high-current output terminal and a three-phase high-voltage output terminal, wherein a second end of a first group of terminals on the three-phase high-current output terminal is connected to a test interval point L1, a second end of a second group of terminals on the three-phase high-current output terminal is connected to a test interval point L2, and a second end on the three-phase high-voltage output terminal is connected to a first end of the voltage transformer 300; the ground wire of the three-phase primary through-flow and primary through-voltage test device E01 is connected to the ground terminal E;
The relay protection automation device R02 comprises a three-phase current input terminal and a three-phase voltage input terminal, a third end of the current transformer 101 is connected to a second end of the three-phase current input terminals of the relay protection automation device R02, and a third end and a fourth end of the voltage transformer 300 are respectively connected to a first end and a 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 three-phase current input terminals and three-phase voltage input terminals, a third end of the current transformer 102 is connected to a second end in the first group of the three-phase current input terminals of the current differential protection R01, a third end of the current transformer 202 is connected to a second end in the second group of the three-phase current input terminals of the current differential protection R01, and a third end and a fourth end of the voltage transformer 300 are respectively connected to the first end and the third end in the three-phase voltage input terminals of the current differential protection R01; the ground of the current differential protection R01 is connected to the ground terminal E.
The three-phase primary through-current and primary through-voltage test device E01 refers to 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 refer to devices for transforming the current of the power system to provide measured currents for the measuring instrument and the relay protection device; the voltage transformer 300 is a device for transforming the voltage of the power system to provide a measured voltage to the measuring instrument and the relay protection device; the relay protection automation device R02 refers to a complete set of equipment of an automation measure for timely sending a warning signal to an operator on duty or directly sending a tripping command to a controlled breaker to terminate the development of the events when a power element (such as a generator, a circuit and the like) in the power system or the power system itself breaks down to endanger the safe operation of the power system, and equipment integrating multiple functions of metering, measuring, controlling, monitoring, communication, event recording, fault recording and misoperation prevention on the power system element;
the current differential protection R01 works by using kirchhoff current theorem and is manufactured according to the principle that the sum of current flowing into nodes in a circuit is equal to zero.
The relay protection and automatic on-load simulation verification system is characterized in that three-phase primary through-flow and primary through-voltage tests are carried out before the project is started and put into operation, and three-phase primary current and primary voltage are applied to enable the system relay protection and automatic on-load simulation to truly reflect the configuration and connection conditions of the system transformer.
Checking whether the wiring of each group of mutual inductors is correct and whether the loop wiring is firm, checking and judging whether the phase relation, the transformation ratio and the protected direction of the accessed current-voltage loop are correct, finding and solving the problems of the accessed relay protection and the current-voltage loop of the automatic system in the debugging stage, drawing a hexagonal chart on test data, and comparing the test data with monitoring data of the comprehensive automatic system;
The method comprehensively and objectively evaluates the operation conditions of the engineering relay protection and the comprehensive automatic system, has high test efficiency and good accuracy, ensures the engineering construction debugging quality, ensures the smooth development of the relay protection and the on-load verification work of the automatic system in the engineering starting stage, and creates a good foundation for realizing the primary optimization of the engineering starting production.
And carrying out three-phase primary through-flow and primary through-voltage tests before starting and putting into production in engineering by using the simulated primary current and primary voltage to test and judge. The relay protection and automation system is verified with analog load through primary current and primary voltage, the phase relation and the protection direction of the current and voltage connected with the current protection in the tape direction, the distance protection and the like are checked and judged to be correct, the relative polarity relation and the transformation ratio of each group of current loops connected with the protection loops through the current differential protection are checked and judged to be correct, the phase relation, the transformation ratio and the polarity of the current and voltage connected with the measuring and metering system are checked and judged to be correct, and the wiring of each group of mutual inductors is checked and judged to be correct and the loop connection is firm. By processing the problems of three-phase primary through-flow and the current-voltage loop of the relay protection and automation system exposed by the primary through-pressure test, the engineering construction debugging quality is ensured, the relay protection and the on-load verification work of the automation system in the engineering starting stage are ensured to be smoothly carried out, and the engineering starting production is ensured to be optimal once.
Preferably, the running state of the system equipment is adjusted, the voltage transformer 300 is isolated from a system bus, a to-be-tested interval of the system (taking any interval L1 and L2 in the system as an example) is selected, a three-phase primary through-flow and primary through-voltage test device E01 is connected to the to-be-tested interval of the system, wherein three-phase primary current output ends of the three-phase primary through-flow and primary through-voltage test device E01 are respectively connected to the test interval L1 and the test interval L2 in the system, a closed primary loop is formed through the system bus, three-phase primary voltage output ends of the three-phase primary through-flow and primary through-voltage test device E01 are connected to the primary side of the voltage transformer 300, synchronous output current voltage values of the three-phase primary through-flow and primary through-voltage test device E01 are regulated, and the current transformers (101, 102, 201 and 202) generate secondary currents in a current loop connected by the relay protection automation device due to the fact that currents of the primary loop are sensed; 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 fact that the primary winding senses a high voltage, and at this time, the relay protection automation device is subjected to load simulation.
Preferably, the mutual phase and amplitude of the current and voltage connected to the relay protection automation device R02 are checked to determine the correctness of the connection, polarity and transformer transformation ratio of the current and voltage loop connected to the relay protection automation device R02.
Preferably, the mutual phase and amplitude of the current-voltage loop connected to the current differential protection R01 are checked, and the correctness of the wiring, polarity and transformer transformation ratio of the current-voltage loop connected to the current differential protection R01 is determined for the phase of each group of current transformers of the current differential protection R01 and the differential current in the differential loop.
Preferably, the R02 belt simulation load checking system and the current differential protection R01 belt simulation load checking system are used for solving the problem of accessing a relay protection and current voltage loop of an automatic system, which is exposed by a belt 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.
Preferably, the solving strategy of relay protection and automatic on-load simulation verification is as follows:
1) The engineering debugging enters a stage before completion acceptance, and three-phase primary through-flow and primary through-pressure tests are carried out on the engineering, so that the system relay protection and automatic device carry simulated load;
2) The operation state of system equipment is adjusted, a voltage transformer is isolated from a system bus, an interval to be tested of the system (taking any interval L1 and L2 in the system as an example) is selected, and a three-phase primary through-flow and primary through-voltage test device is connected to the interval to be tested of the system;
3) And adjusting synchronous output current and voltage values of the three-phase primary through-flow and primary through-voltage test device E01 to enable the relay protection and automation device to carry out load simulation, finding and solving the problems of the current and voltage loop of the relay protection and automation system connected in the debugging stage, and checking the mutual phase and amplitude of the current and voltage loop connected with the relay protection and automation device.
The invention can achieve the following effects:
The invention discloses a relay protection and automation on-load simulation verification system, which is used for carrying out three-phase primary through-flow and primary through-voltage tests before starting and putting into production in engineering and applying simulated primary current and primary voltage for verification and judgment. The relay protection and automation system is verified with analog load through primary current and primary voltage, the phase relation and the protection direction of the current and voltage connected with the current protection in the tape direction, the distance protection and the like are checked and judged to be correct, the relative polarity relation and the transformation ratio of each group of current loops connected with the protection loops through the current differential protection are checked and judged to be correct, the phase relation, the transformation ratio and the polarity of the current and voltage connected with the measuring and metering system are checked and judged to be correct, and the wiring of each group of mutual inductors is checked and judged to be correct and the loop connection is firm. By processing the problems of three-phase primary through-flow and the current-voltage loop of the relay protection and automation system exposed by the primary through-pressure test, the engineering construction debugging quality is guaranteed, the relay protection and the on-load verification work of the automation system in the engineering starting stage are ensured to be smoothly carried out, the engineering starting operation is ensured to be optimal once, 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 diagram of a test wiring of the present invention.
Fig. 3 is a schematic diagram of the automatic on-load simulation verification of relay protection according to the present invention.
FIG. 4 is a schematic diagram of a current differential protection band simulated load verification of the present invention.
Detailed Description
The invention is further described below with reference to the drawings and examples.
The embodiment, a relay protection and automation on-load simulation verification system is shown in fig. 1-4, and comprises an electric primary circuit, a three-phase primary through-flow and primary through-pressure 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; a 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 a first end of the current transformer 202, and a 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 grounding end E;
The three-phase primary through-current and primary through-voltage test device E01 comprises a three-phase high-current output terminal and a three-phase high-voltage output terminal, wherein a second end of a first group of terminals on the three-phase high-current output terminal is connected to a test interval point L1, a second end of a second group of terminals on the three-phase high-current output terminal is connected to a test interval point L2, and a second end on the three-phase high-voltage output terminal is connected to a first end of the voltage transformer 300; the ground wire of the three-phase primary through-flow and primary through-voltage test device E01 is connected to the ground terminal E;
The relay protection automation device R02 comprises a three-phase current input terminal and a three-phase voltage input terminal, a third end of the current transformer 101 is connected to a second end of the three-phase current input terminals of the relay protection automation device R02, and a third end and a fourth end of the voltage transformer 300 are respectively connected to a first end and a 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 three-phase current input terminals and three-phase voltage input terminals, a third end of the current transformer 102 is connected to a second end in the first group of the three-phase current input terminals of the current differential protection R01, a third end of the current transformer 202 is connected to a second end in the second group of the three-phase current input terminals of the current differential protection R01, and a third end and a fourth end of the voltage transformer 300 are respectively connected to the first end and the third end in the three-phase voltage input terminals of the current differential protection R01; the ground of the current differential protection R01 is connected to the ground terminal E.
The three-phase primary through-current and primary through-voltage test device E01 refers to 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 refer to devices for transforming the current of the power system to provide measured currents for the measuring instrument and the relay protection device; the voltage transformer 300 is a device for transforming the voltage of the power system to provide a measured voltage to the measuring instrument and the relay protection device; the relay protection automation device R02 refers to a complete set of equipment of an automation measure for timely sending a warning signal to an operator on duty or directly sending a tripping command to a controlled breaker to terminate the development of the events when a power element (such as a generator, a circuit and the like) in the power system or the power system itself breaks down to endanger the safe operation of the power system, and equipment integrating multiple functions of metering, measuring, controlling, monitoring, communication, event recording, fault recording and misoperation prevention on the power system element;
the current differential protection R01 works by using kirchhoff current theorem and is manufactured according to the principle that the sum of current flowing into nodes in a circuit is equal to zero.
The relay protection and automatic on-load simulation verification system is characterized in that three-phase primary through-flow and primary through-voltage tests are carried out before the project is started and put into operation, and three-phase primary current and primary voltage are applied to enable the system relay protection and automatic on-load simulation to truly reflect the configuration and connection conditions of the system transformer.
Checking whether the wiring of each group of mutual inductors is correct and whether the loop wiring is firm, checking and judging whether the phase relation, the transformation ratio and the protected direction of the accessed current-voltage loop are correct, finding and solving the problems of the accessed relay protection and the current-voltage loop of the automatic system in the debugging stage, drawing a hexagonal chart on test data, and comparing the test data with monitoring data of the comprehensive automatic system;
The method comprehensively and objectively evaluates the operation conditions of the engineering relay protection and the comprehensive automatic system, has high test efficiency and good accuracy, ensures the engineering construction debugging quality, ensures the smooth development of the relay protection and the on-load verification work of the automatic system in the engineering starting stage, and creates a good foundation for realizing the primary optimization of the engineering starting production.
The operation state of system equipment is adjusted to enable a voltage transformer 300 to be isolated from a system bus, a to-be-tested interval of the system (taking any interval L1 and L2 in the system as an example) is selected, a three-phase primary through-flow and primary through-voltage test device E01 is connected to the to-be-tested interval of the system, wherein three-phase primary current output ends of the three-phase primary through-flow and primary through-voltage test device E01 are respectively connected with the test interval L1 and the test interval L2 in the system, a closed primary loop is formed through the system bus, three-phase primary voltage output ends of the three-phase primary through-flow and primary through-voltage test device E01 are connected with the primary side of the voltage transformer 300, synchronous output current and voltage values of the three-phase primary through-flow and primary through-voltage test device E01 are adjusted, and the current transformers (101, 102, 201 and 202) generate secondary current in a current loop connected with a relay protection automation device due to the fact that the current of the primary loop of the system is sensed; 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 fact that the primary winding senses a high voltage, and at this time, the relay protection automation device is subjected to load simulation.
And checking the mutual phase and amplitude of the current and the voltage accessed by the relay protection automation device R02 to judge the correctness of the wiring, the polarity and the transformer transformation ratio of the current and the 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 correctness of the wiring, the polarity and the transformer transformation ratio of the current-voltage loop connected with the current differential protection R01 is judged according to the phase of each group of current transformers of the current differential protection R01 and the differential current in the differential loop.
And R02 with a simulated load checking system and the current differential protection R01 with the simulated load checking system are used for solving the problem of accessing a relay protection and current-voltage loop of an automatic system, which is exposed by a simulated 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 ending after a final test result is obtained.
The solving strategy of relay protection and automatic on-load simulation verification is as follows:
1) The engineering debugging enters a stage before completion acceptance, and three-phase primary through-flow and primary through-pressure tests are carried out on the engineering, so that the system relay protection and automatic device carry simulated load;
2) The operation state of system equipment is adjusted, a voltage transformer is isolated from a system bus, an interval to be tested of the system (taking any interval L1 and L2 in the system as an example) is selected, and a three-phase primary through-flow and primary through-voltage test device is connected to the interval to be tested of the system;
3) And adjusting synchronous output current and voltage values of the three-phase primary through-flow and primary through-voltage test device E01 to enable the relay protection and automation device to carry out load simulation, finding and solving the problems of the current and voltage loop of the relay protection and automation system connected in the debugging stage, and checking the mutual phase and amplitude of the current and voltage loop connected with the relay protection and automation device.
And carrying out three-phase primary through-flow and primary through-voltage tests before starting and putting into production in engineering by using the simulated primary current and primary voltage to test and judge. The relay protection and automation system is verified with analog load through primary current and primary voltage, the phase relation and the protection direction of the current and voltage connected with the current protection in the tape direction, the distance protection and the like are checked and judged to be correct, the relative polarity relation and the transformation ratio of each group of current loops connected with the protection loops through the current differential protection are checked and judged to be correct, the phase relation, the transformation ratio and the polarity of the current and voltage connected with the measuring and metering system are checked and judged to be correct, and the wiring of each group of mutual inductors is checked and judged to be correct and the loop connection is firm. The problems of the relay protection and the current-voltage loop of the automatic system are solved by processing the three-phase primary through current and the current-voltage loop which are exposed by the primary through voltage test.
The invention is to develop and implement a relay protection and automatic on-load simulation verification system in the early stage of starting production in the later stage of engineering construction and debugging, and the on-load simulation load of the relay protection and automation device of the system is realized through three-phase one-time through-flow and one-time through-pressure test, so that the configuration and connection conditions of a system transformer are truly reflected. Checking whether the wiring of each group of mutual inductors (including the standby winding) is correct and whether the loop connection is firm, checking and judging whether the phase relation, the transformation ratio and the protected direction of the accessed current-voltage loop are correct, finding and solving the problems of the accessed relay protection and the current-voltage loop of the automatic system in the debugging stage, drawing a hexagonal chart on test data, comparing the test data with the monitoring data of the comprehensive automatic system, comprehensively and objectively evaluating the operation condition of the engineering relay protection and the comprehensive automatic system, and ensuring the engineering construction debugging quality, ensuring the smooth development of the on-load verification work of the relay protection and the automatic system in the engineering starting stage, and creating a good foundation for realizing one-time optimization of the engineering starting operation.
The embodiments of the present invention have been described above with reference to the accompanying drawings, but the embodiments are not limited to the above examples, and various changes or modifications may be made by one of ordinary skill in the art within the scope of the appended claims.
Claims (5)
1. The relay protection and automation on-load simulation 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; a 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 a first end of the current transformer 202, and a 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 grounding end E;
The three-phase primary through-current and primary through-voltage test device E01 comprises a three-phase high-current output terminal and a three-phase high-voltage output terminal, wherein a second end of a first group of terminals on the three-phase high-current output terminal is connected to a test interval point L1, a second end of a second group of terminals on the three-phase high-current output terminal is connected to a test interval point L2, and a second end on the three-phase high-voltage output terminal is connected to a first end of the voltage transformer 300; the ground wire of the three-phase primary through-flow and primary through-voltage test device E01 is connected to the ground terminal E;
The relay protection automation device R02 comprises a three-phase current input terminal and a three-phase voltage input terminal, a third end of the current transformer 101 is connected to a second end of the three-phase current input terminals of the relay protection automation device R02, and a third end and a fourth end of the voltage transformer 300 are respectively connected to a first end and a 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 three-phase current input terminals and three-phase voltage input terminals, a third end of the current transformer 102 is connected to a second end in the first group of the three-phase current input terminals of the current differential protection R01, a third end of the current transformer 202 is connected to a second end in the second group of the three-phase current input terminals of the current differential protection R01, and a third end and a fourth end of the voltage transformer 300 are respectively connected to the first end and the third end in the three-phase voltage input terminals of the current differential protection R01; the ground of the current differential protection R01 is connected to the ground terminal E.
2. The relay protection and automation on-load verification system according to claim 1, wherein the operation state of system equipment is adjusted, a voltage transformer 300 is isolated from a system bus, a to-be-tested interval of the system is selected, a three-phase primary through current and primary through voltage test device E01 is connected to the to-be-tested interval of the system, three-phase primary current output ends of the three-phase primary through current and primary through voltage test device E01 are respectively connected with a test interval L1 and a test interval L2 in the system, a closed primary loop is formed through the system bus, three-phase primary voltage output ends of the three-phase primary through current and primary through voltage test device E01 are connected with the primary side of the voltage transformer 300, synchronous output current voltage values of the three-phase primary through current and primary through voltage test device E01 are adjusted, and secondary currents are generated in a current loop connected with the relay protection automation device due to the fact that currents of the primary loop of the system are sensed by the current transformers (101, 102, 201, 202); 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 fact that the primary winding senses a high voltage, and at this time, the relay protection automation device is subjected to load simulation.
3. The relay protection and automation on-load simulation verification system according to claim 1, wherein mutual phases and amplitudes of current and voltage accessed by the relay protection automation device R02 are checked to determine correctness of wiring, polarity and transformer transformation ratio of a current and voltage loop accessed by the relay protection automation device R02.
4. The system of claim 1, wherein the mutual phases and amplitudes of the current-voltage loops connected to the current differential protection R01 are verified, and the correctness of the wiring, the polarity and the transformer transformation ratio of the current-voltage loops connected to the current differential protection R01 is determined for the phase of each group of current transformers of the current differential protection R01 and the differential current in the differential loops.
5. The relay protection and automation on-load simulation verification system according to claim 1, wherein the solution strategy of relay protection and automation on-load simulation verification is:
1) The engineering debugging enters a stage before completion acceptance, and three-phase primary through-flow and primary through-pressure tests are carried out on the engineering, so that the system relay protection and automatic device carry simulated load;
2) The operation state of system equipment is adjusted, a voltage transformer is isolated from a system bus, a to-be-tested interval of the system is selected, and a three-phase primary through-flow and primary through-voltage test device is connected to the to-be-tested interval of the system;
3) And adjusting synchronous output current and voltage values of the three-phase primary through-flow and primary through-voltage test device E01 to enable the relay protection and automation device to carry out load simulation, finding and solving the problems of the current and voltage loop of the relay protection and automation system connected in the debugging stage, and checking the mutual phase and amplitude of the current and voltage loop connected with the relay protection and automation device.
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| CN101587157B (en) * | 2009-06-26 | 2011-05-11 | 河南省电力公司商丘供电公司 | Bus differential protection polarity test method |
| CN201466695U (en) * | 2009-08-21 | 2010-05-12 | 上海锐安自动化***有限公司 | Multifunctional relay protection device |
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| CN103487617B (en) * | 2013-10-12 | 2016-08-17 | 国家电网公司 | Three-phase once logical pressure and the most through-flow device |
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