Generator set current harmonic adaptability test device

Abstract

The utility model relates to a generator set current harmonic adaptability test device comprising a resistive load R1, switch cabinets S3-CB2, a current transformer TA1, a lightning arrester F1, a grounding knife switch PE2, isolation knife switches S3-CK2, a grounding knife switch PE1, switch cabinets S3-CB3, a current transformer TA2, a lightning arrester F2, a grounding knife switch PE3, and a high-voltage reactive harmonic source S3-SVG1 which are connected with a tested generator set in sequence to form a test loop. And an integrated control system. The generator set current harmonic adaptability test device solves the problem that the current harmonic adaptability test of a high-voltage large-capacity generator set cannot be met in a laboratory at present, and has the beneficial effects that adjustable harmonic current is output to a test loop through a high-voltage reactive harmonic source; the adaptive state of the high-voltage generator set to current harmonic waves during normal on-load work is detected, and meanwhile, effective overvoltage protection can be carried out on electric devices and test objects in a test loop.

Description

Technical Field

[0001] This utility model relates to the field of generator technology and high-voltage reactive harmonic source technology, specifically to a generator set current harmonic adaptability test device. Background Technology

[0002] In existing high-voltage, high-capacity generator set tests, current harmonics occur during normal load operation of the high-voltage generator. However, the generator's adaptability to current harmonics cannot be verified before it is put into use. This adaptability manifests as an inability to predict the generator set's long-term operating conditions under current harmonics, and an inability to predict the performance interference of current harmonics in the circuit after production. Currently, laboratory testing facilities cannot meet the requirements for testing the current harmonic adaptability of high-voltage, high-capacity generator sets. Therefore, to meet current market needs, it is urgent to construct a generator set current harmonic adaptability testing device. Utility Model Content

[0003] The technical problem to be solved by this utility model is to address the current inability to meet the requirements of high-voltage, large-capacity generator set current harmonic adaptability testing in the laboratory. This invention provides a generator set current harmonic adaptability testing device that outputs adjustable harmonic current to the test circuit through a high-voltage reactive harmonic source, thereby detecting the adaptability of the high-voltage generator set to current harmonics during normal load operation and providing effective overvoltage protection for electrical components and test samples in the test circuit.

[0004] This generator set current harmonic adaptability test device includes a resistive load R1, switchgear S3-CB2, current transformer TA1, surge arrester F1, grounding switch PE2, isolating switch S3-CK2, grounding switch PE1, switchgear S3-CB3, current transformer TA2, surge arrester F2, grounding switch PE3, high-voltage reactive harmonic source S3-SVG1, and an integrated control system, all connected sequentially to the generator set under test to form a test circuit. The resistive load R1 is used to consume active power in the circuit and adjust the power factor. The high-voltage reactive harmonic source S3-SVG1 is used to generate and emit inductive and capacitive reactive and harmonic currents into the circuit. The current transformers TA1 / TA2 are used to collect current parameters in the circuit. The switchgear S3-CB2 / S3-CB3 is used to control the connection and provide circuit protection for electrical components in the circuit through opening and closing. The isolating switch S3-CK2 / S3-CK2 is used for maintenance. The system creates breakpoints at different locations in the circuit by opening and closing, isolating the power supply to electrical components in the circuit. The grounding switches PE1 / PE2 / PE3 are used to create grounding protection at different locations in the circuit during maintenance. The surge arresters F1 / F2 are used to protect electrical components in the circuit from overvoltage impacts caused by lightning, operation, and power frequency transients. The integrated control system is used to control and adjust the switching and power setting of the resistive load R1, control and adjust the reactive power and harmonic current output of the high-voltage reactive harmonic source S3-SVG1, control the on / off of circuit breakers, isolating switches S3-CK2 / S3-CK2, and grounding switches PE1 / PE2 / PE3 in the switch cabinets S3-CB2 / S3-CB3 in the circuit, and receive and process the current parameters collected by the current transformers TA1 / TA2, collect the circuit voltage and generator set temperature parameters to determine whether the operating status of the tested generator set under different harmonic currents is normal.

[0005] Furthermore, the control output terminals of the integrated control system are respectively connected to resistive load R1, high-voltage reactive harmonic source S3-SVG1, switch cabinet S3-CB2 / S3-CB3, isolating switch S3-CK2 / S3-CK2, and grounding switch PE1 / PE2 / PE3.

[0006] Furthermore, a voltage transformer is connected in parallel to the resistive load R1, and a temperature sensor is installed on the generator set under test. The output terminals of the current transformer, voltage transformer, and temperature sensor are connected to the signal input terminal of the integrated control system.

[0007] Furthermore, the integrated control system also includes an operation terminal, which is wirelessly connected to the integrated control system via data transmission. This utility model provides a generator set current harmonic adaptability testing device, solving the problem that current harmonic adaptability testing of high-voltage, large-capacity generator sets cannot be performed in the laboratory. Its beneficial effects are: by outputting an adjustable harmonic current to the test circuit through a high-voltage reactive harmonic source, it enables the detection of the adaptability of the high-voltage generator set to current harmonics during normal load operation, and simultaneously provides effective overvoltage protection for electrical components and test samples in the test circuit. Attached Figure Description

[0008] The following description, in conjunction with the accompanying drawings, further illustrates the generator set current harmonic adaptability testing device of this utility model:

[0009] Figure 1 This is a circuit diagram of implementation methods 1 and 2 of the current harmonic adaptability test device for this generator set; Figure 2 This is a schematic diagram of the control connection of the centralized control system described in embodiments 3 and 4 of the generator set current harmonic adaptability test device. Detailed Implementation

[0010] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0011] In the description of this utility model, it should be understood that the terms "left", "right", "front", "rear", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0012] The present invention will be further described below with specific embodiments, but the scope of protection of the present invention is not limited to the following embodiments.

[0013] Implementation method 1: such as Figure 1As shown, the current harmonic adaptability test device for this generator set includes a resistive load R1, switchgear S3-CB2, current transformer TA1, surge arrester F1, grounding switch PE2, isolating switch S3-CK2, grounding switch PE1, switchgear S3-CB3, current transformer TA2, surge arrester F2, grounding switch PE3, high-voltage reactive harmonic source S3-SVG1, and an integrated control system, which are connected in sequence with the generator set under test to form a test circuit. The resistive load R1 is used to consume active power in the circuit and adjust the power factor. The high-voltage reactive harmonic source S3-SVG1 is used to generate and emit inductive and capacitive reactive and harmonic currents into the circuit. The current transformers TA1 / TA2 are used to collect current parameters in the circuit. The switchgear S3-CB2 / S3-CB3 is used to control the connection and provide circuit protection for electrical components in the circuit through opening and closing. The isolating switch S3-CK2 / S3-CK2 is used to... During maintenance, the circuit is opened and closed to create breakpoints at different locations in the circuit, isolating the electrical components in the circuit. The grounding switches PE1 / PE2 / PE3 are used to create grounding protection at different locations in the circuit during maintenance. The surge arresters F1 / F2 are used to protect the electrical components in the circuit from overvoltage impacts caused by lightning, operation, and power frequency transients. The integrated control system is used to control and adjust the switching and power setting of the resistive load R1, control and adjust the reactive power and harmonic current output of the high-voltage reactive harmonic source S3-SVG1, control the on / off of the circuit breakers, isolating switches S3-CK2 / S3-CK2, and grounding switches PE1 / PE2 / PE3 in the switch cabinets S3-CB2 / S3-CB3 in the circuit, and receive and process the current parameters collected by the current transformers TA1 / TA2, collect the circuit voltage and generator set temperature parameters to determine whether the operating status of the tested generator set under different harmonic currents is normal.

[0014] Implementation Method 2: The control output terminals of the integrated control system of this generator set current harmonic adaptability test device are respectively connected to the resistive load R1, the high-voltage reactive harmonic source S3-SVG1, the switch cabinet S3-CB2 / S3-CB3, the isolating switch S3-CK2 / S3-CK2, and the grounding switch PE1 / PE2 / PE3. The remaining structures and components are as described in Implementation Method 1 and will not be repeated.

[0015] Implementation method 3: such as Figure 2 As shown, a voltage transformer is connected in parallel to the resistive load R1 of this generator set current harmonic adaptability test device. A temperature sensor is installed on the generator set under test. The output terminals of the current transformer, voltage transformer, and temperature sensor are connected to the signal input terminal of the integrated control system. The remaining structures and components are as described in Embodiment 1 and will not be described again.

[0016] Implementation Method 4: The integrated control system of this generator set current harmonic adaptability test device also includes an operation terminal, which is wirelessly connected to the integrated control system via data transmission. The remaining structures and components are as described in Implementation Method 1 and will not be repeated.

[0017] During operation: The operating terminal remotely controls the generator set via the integrated control system to start the generator set and disconnect the grounding switch in the circuit. Simultaneously, the control system closes the isolating switch in the circuit and gradually closes the circuit breakers in the switchgear. Then, it controls the switching of resistive loads in the circuit. Next, it adjusts the high-voltage reactive harmonic source to emit variable inductive and capacitive reactive power, as well as harmonic currents, to control the parameters in the system circuit. The device adjusts the circuit power factor, resistive load resistance, and the power of the high-voltage reactive harmonic source according to the requirements of the generator set under test. After reaching the rated load requirement, it adjusts the harmonic current of the high-voltage reactive harmonic source and simultaneously collects data such as circuit current, voltage, and generator set temperature for analysis and judgment, thereby achieving a judgment on the generator set's current harmonic adaptability.

[0018] This generator set current harmonic adaptability test device solves the problem that the laboratory cannot meet the current harmonic adaptability test requirements of high-voltage, large-capacity generator sets. The beneficial effects are: by outputting an adjustable harmonic current to the test circuit through a high-voltage reactive harmonic source, the adaptability of the high-voltage generator set to current harmonics during normal load operation can be detected, and at the same time, effective overvoltage protection can be provided for the electrical components and test samples in the test circuit.

[0019] The above description illustrates the main features, basic principles, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments or examples described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the above embodiments or examples should be considered exemplary and not restrictive. The scope of this utility model is defined by the appended claims rather than the foregoing description, and therefore all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims. Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity, and those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A generator set current harmonic adaptability test device, characterized in that: The test circuit includes a resistive load R1 connected in sequence to the generator set under test, switchgear S3-CB2, current transformer TA1, surge arrester F1, grounding switch PE2, isolating switch S3-CK2, grounding switch PE1, switchgear S3-CB3, current transformer TA2, surge arrester F2, grounding switch PE3, high-voltage reactive harmonic source S3-SVG1, and an integrated control system. The resistive load R1 is used to consume the active power in the circuit and regulate the power factor in the circuit. The high-voltage reactive harmonic source S3-SVG1 is used to generate and send inductive and capacitive reactive and harmonic currents into the circuit. The current transformers TA1 / TA2 are used to collect current parameters in the circuit; The switch cabinet S3-CB2 / S3-CB3 is used to control the connection and protect the circuit components by opening and closing. The isolating switch S3-CK2 / S3-CK2 is used to create breakpoints at different positions in the circuit during maintenance, thereby isolating the power supply to electrical components in the circuit. The grounding switches PE1 / PE2 / PE3 are used to form grounding protection at different positions in the circuit by opening and closing during maintenance. The surge arresters F1 / F2 are used to protect the electrical components in the circuit from overvoltage surges caused by lightning, operation, and power frequency transients, thus protecting the electrical components in the circuit. The integrated control system is used to control and adjust the switching and power setting of resistive load R1, control and adjust the reactive power and harmonic current output of high-voltage reactive harmonic source S3-SVG1, control the on / off of circuit breakers, isolating switches S3-CK2 / S3-CK2, and grounding switches PE1 / PE2 / PE3 in switch cabinets S3-CB2 / S3-CB3 in the control circuit, and receive and process the current parameters collected by current transformers TA1 / TA2, collect the circuit voltage and generator set temperature parameters to determine whether the operating status of the tested generator set under different harmonic currents is normal.

2. The generator set current harmonic adaptability test device according to claim 1, characterized in that: The control output terminals of the integrated control system are respectively connected to resistive load R1, high-voltage reactive harmonic source S3-SVG1, switch cabinet S3-CB2 / S3-CB3, isolating switch S3-CK2 / S3-CK2, and grounding switch PE1 / PE2 / PE3.

3. The generator set current harmonic adaptability test device according to claim 2, characterized in that: A voltage transformer is connected in parallel to the resistive load R1, and a temperature sensor is installed on the generator set under test. The output terminals of the current transformer, voltage transformer, and temperature sensor are connected to the signal input terminal of the integrated control system.

4. The generator set current harmonic adaptability test device according to claim 3, characterized in that: The integrated control system also includes an operation terminal, which is wirelessly connected to the integrated control system for data transmission communication.

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