Alternating-current extra-high-voltage station equipment boosting and analog load type vector checking device and method

Abstract

The invention relates to the technical field of power grid debugging, and discloses an alternating-current extra-high voltage station equipment boosting and analog load type vector checking device and method.The device comprises a variable-frequency power source, an extra-high voltage electric reactor and a voltage measuring unit, the variable-frequency power source is connected with the extra-high voltage electric reactor, and GIS equipment and a transformer in an extra-high voltage station are connected in parallel to form a parallel loop; one end of a parallel loop formed by mutually connecting the GIS equipment in parallel is connected with the extra-high voltage reactor, the other end of the parallel loop is connected with the transformer, a series loop is formed among the variable-frequency power supply, the extra-high voltage reactor and the parallel loop, series and parallel compensation loops are formed by the parallel loop and the series loop, and the voltage measuring unit is connected with the series loop in the series and parallel compensation loops; according to the invention, the problem that the step-up and current-up test of the primary and secondary equipment of the existing AC extra-high voltage station is not carried out due to lack of a test method or a power supply and is unfavorable for handover acceptance and safe commissioning of the extra-high voltage station is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of power grid debugging, and in particular to an AC ultra-high voltage station equipment voltage boosting and simulated load type vector inspection device and method. Background Art

[0002] In the past, live commissioning of new high-voltage substations usually required the use of power from the grid system. However, this method of commissioning can threaten the normal operation of the grid due to the safety uncertainty of the new equipment. However, if an independent power plant is used to provide power, there are many difficulties and it is difficult to implement. If the voltage and current increase tests of the primary and secondary equipment of the AC UHV station cannot be carried out due to the lack of test methods or power supply, it will be extremely unfavorable to the handover acceptance and safe commissioning of the UHV station. Therefore, it is necessary to conduct voltage and current increase commissioning tests on the UHV station without affecting the normal operation of the grid. Summary of the invention

[0003] The present invention provides an AC UHV station equipment voltage boosting and simulated load type vector inspection device and method to solve the problem that the voltage boosting and current raising tests of the primary and secondary equipment of the existing AC UHV station are not carried out due to lack of test methods or power supply, which is very unfavorable to the handover acceptance and safe commissioning of the UHV station.

[0004] In order to achieve the above object, the present invention is implemented by the following technical solutions: In the first aspect, the present invention provides an AC UHV station equipment boosting and simulated load vector inspection device, the device comprising: a variable frequency power supply, a UHV reactor and a pressure measuring unit, the variable frequency power supply is connected to the UHV reactor, the GIS equipment and the transformer in the UHV station are connected in parallel to form a parallel circuit, one end of the parallel circuit formed by the GIS equipment in parallel is connected to the UHV reactor, and the other end is connected to the transformer, a series circuit is formed between the variable frequency power supply, the UHV reactor and the parallel circuit, a series and parallel compensation circuit is formed by the parallel circuit and the series circuit, and the pressure measuring unit is connected to the series circuit in the series and parallel compensation circuit.

[0005] Optionally, the device further includes: a voltage transformer, a current transformer, a voltage and current boosting device, and a voltage and current acquisition device; The voltage transformer and the current transformer are both connected to the series and parallel compensation circuits, the voltage and current acquisition device is connected to the voltage transformer and the current transformer, and the voltage and current boosting device is connected to the variable frequency power supply.

[0006] In a second aspect, an embodiment of the present application provides a method for boosting and simulating load vector inspection of AC UHV station equipment, which is applied to an AC UHV station equipment boosting and simulating load vector inspection device described in the first aspect, and the method includes: The GIS equipment and transformer in the UHV station are connected in parallel to form a parallel circuit, and the variable frequency power supply, UHV reactor and parallel circuit are connected in series to form a series circuit; Parallel circuits and series circuits are used to form series and parallel compensation circuits, and series and parallel compensation circuits are used to carry out voltage and current boosting commissioning tests on primary and secondary equipment in UHV stations.

[0007] Optionally, the method further includes: The voltage data in the voltage transformer and the current data in the current transformer are collected by a voltage and current collection device, and the voltage data and the current data are compared with the voltage and current output by the boost and current increasing device in terms of magnitude and phase. When the magnitude and phase of the voltage data and the current data are equal to or consistent with the magnitude and phase of the voltage and current output by the boost and current increasing device, the relay protection and secondary circuit wiring in the series and parallel circuits meet the requirements; otherwise, the relay protection and secondary circuit wiring in the series and parallel circuits do not meet the requirements.

[0008] Beneficial effects: The AC UHV station equipment voltage boosting and simulated load vector inspection method provided by the present invention makes the voltage boosting and current increasing tests of the primary and secondary equipment of the UHV station feasible and easy to operate. The high voltage test of the primary equipment of the UHV station and the related debugging of the secondary equipment and the circuit can be completed by one set of equipment through one voltage boost. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 A wiring diagram of a voltage and current boost test for a single-phase AC UHV device according to a preferred embodiment of the present invention; Figure 2 A wiring diagram of a voltage and current boost test of a three-phase AC UHV device according to a preferred embodiment of the present invention; Figure 3 It is a schematic diagram of the principle of analog polarity verification for voltage and current boosting of three-phase AC UHV equipment according to a preferred embodiment of the present invention; Figure 4 The present invention is a flowchart of a method for voltage boosting and simulated load vector inspection of AC UHV station equipment according to a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0010] The technical solution of the present invention is described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0011] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not indicate quantity restrictions, but indicate the existence of at least one. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship also changes accordingly.

[0012] Embodiment 1: See also Figure 1 The embodiment of the present application provides an AC UHV station equipment boosting and simulated load vector inspection device, the device includes: a variable frequency power supply, a UHV reactor and a pressure measuring unit, the variable frequency power supply is connected to the UHV reactor, the GIS equipment and the transformer in the UHV station are connected in parallel to form a parallel circuit, one end of the parallel circuit formed by the GIS equipment is connected to the UHV reactor, and the other end is connected to the transformer, a series circuit is formed between the variable frequency power supply, the UHV reactor and the parallel circuit, a series and parallel compensation circuit is formed by the parallel circuit and the series circuit, and the pressure measuring unit is connected to the series circuit in the series and parallel compensation circuit.

[0013] Optionally, the device further includes: a voltage transformer, a current transformer, a voltage and current boosting device, and a voltage and current acquisition device; The voltage transformer and the current transformer are both connected to the series and parallel compensation circuits, the voltage and current acquisition device is connected to the voltage transformer and the current transformer, and the voltage and current boosting device is connected to the variable frequency power supply.

[0014] In the above embodiment, if Figure 1 As shown, this embodiment provides a single-phase AC UHV station equipment boost and simulated load vector inspection device, using a single-phase variable frequency power supply test device as a power supply device, through the test excitation transformer series UHV reactor, UHV GIS, UHV transformer and other equipment, forming a series and parallel compensation loop for boost debugging, which can realize the boost and current test of the primary and secondary equipment of the UHV station, and the single-phase high voltage test of the primary equipment of the UHV station and the related debugging of the secondary equipment and loop can be completed by a set of devices with one boost. In this embodiment, the rated power of the test variable frequency power supply cabinet is 900KW, the frequency is 50~300Hz, the rated capacity of the test excitation transformer is 900kVA, and the rated current of the high voltage output of the test excitation transformer is 300A.

[0015] Embodiment 2: like Figure 2 As shown, this embodiment provides a three-phase AC UHV station equipment boost and simulated load vector inspection device, using a three-phase variable frequency power supply test device as a power supply device, through the test excitation transformer series UHV reactor, UHV GIS, UHV transformer and other equipment, forming a series and parallel compensation loop for boost debugging, which can realize the boost and current test of the primary and secondary equipment of the UHV station, and the high voltage test of the three phases of the primary equipment of the UHV station and the related debugging of the secondary equipment and loop can be completed by a set of devices. In this embodiment, the rated power of the test variable frequency power supply cabinet is 1350KW, the frequency is 50~300Hz, the rated capacity of the test excitation transformer is 1200kVA, and the rated current of the high voltage output of the test excitation transformer is 450A.

[0016] Embodiment 3: like Figure 3 As shown, this embodiment provides a three-phase AC UHV station equipment boost and current secondary equipment analog polarity verification device, using a three-phase variable frequency power supply test device as a power supply device, through the test excitation transformer series UHV reactor, UHV GIS, UHV transformer and other equipment, forming a series and parallel compensation loop for boost debugging, which can realize the boost and current test of the primary and secondary equipment of the UHV station. During the boost and voltage test, the voltage and current of the relay protection equipment corresponding to the secondary side of the voltage transformer and the current transformer are collected, and compared with the voltage, current and phase polarity output by the boost and current device to verify the correctness of the secondary circuit wiring of the relay protection. In this embodiment, the rated power of the test variable frequency power supply cabinet is 1350KW, the frequency is 50~300Hz, the rated capacity of the test excitation transformer is 1200kVA, and the rated current of the test excitation transformer high voltage output is 450A. The secondary voltage and current acquisition device used is a portable voltage and current acquisition device with an acquisition frequency range of 50~300Hz, a voltage range of 0~220V, and a current range of 0~10A. The acquisition device has the function of collecting and forwarding analog information of different frequency values. The main control device has the function of receiving the voltage and current information sent by the acquisition device and comparing it with the output primary voltage and current information to realize the analog polarity check function of the relay protection equipment.

[0017] like Figure 4 As shown, the embodiment of the present application also provides an AC UHV station equipment boosting and simulated load type vector inspection method, which is applied to an AC UHV station equipment boosting and simulated load type vector inspection device, and the method includes: The GIS equipment and transformer in the UHV station are connected in parallel to form a parallel circuit, and the variable frequency power supply, UHV reactor and parallel circuit are connected in series to form a series circuit; Parallel circuits and series circuits are used to form series and parallel compensation circuits, and series and parallel compensation circuits are used to carry out voltage and current boosting commissioning tests on primary and secondary equipment in UHV stations.

[0018] Optionally, the method further includes: The voltage data in the voltage transformer and the current data in the current transformer are collected by a voltage and current collection device, and the voltage data and the current data are compared with the voltage and current output by the boost and current increasing device in terms of magnitude and phase. When the magnitude and phase of the voltage data and the current data are equal to or consistent with the magnitude and phase of the voltage and current output by the boost and current increasing device, the relay protection and secondary circuit wiring in the series and parallel circuits meet the requirements; otherwise, the relay protection and secondary circuit wiring in the series and parallel circuits do not meet the requirements.

[0019] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. An AC UHV station equipment boost and simulated load type vector inspection device, characterized in that: The device comprises: a variable frequency power supply, an ultra-high voltage reactor and a pressure measuring unit, wherein the variable frequency power supply is connected to the ultra-high voltage reactor, the GIS equipment and the transformer in the ultra-high voltage station are connected in parallel to form a parallel circuit, one end of the parallel circuit formed by the GIS equipment being connected in parallel is connected to the ultra-high voltage reactor, and the other end is connected to the transformer, a series circuit is formed between the variable frequency power supply, the ultra-high voltage reactor and the parallel circuit, a series and parallel compensation circuit is formed by the parallel circuit and the series circuit, and the pressure measuring unit is connected to the series circuit in the series and parallel compensation circuit.

2. The AC UHV station equipment boosting and simulated load vector inspection device according to claim 1 is characterized in that: The device also includes: a voltage transformer, a current transformer, a voltage and current boosting device, and a voltage and current acquisition device; The voltage transformer and the current transformer are both connected to the series and parallel compensation circuits, the voltage and current acquisition device is connected to the voltage transformer and the current transformer, and the voltage and current boosting device is connected to the variable frequency power supply.

3. A method for boosting and simulating load vector inspection of AC UHV station equipment, applied to an AC UHV station equipment boosting and simulating load vector inspection device as described in claim 1-2, characterized in that: The method comprises: The GIS equipment and transformer in the UHV station are connected in parallel to form a parallel circuit, and the variable frequency power supply, UHV reactor and parallel circuit are connected in series to form a series circuit; Parallel circuits and series circuits are used to form series and parallel compensation circuits, and series and parallel compensation circuits are used to carry out voltage and current boosting commissioning tests on primary and secondary equipment in UHV stations.

4. The AC UHV station equipment boosting and simulated load vector inspection method according to claim 3 is characterized in that: The method further comprises: The voltage data in the voltage transformer and the current data in the current transformer are collected by a voltage and current collection device, and the voltage data and the current data are compared with the voltage and current output by the boost and current increasing device in terms of magnitude and phase. When the magnitude and phase of the voltage data and the current data are equal to or consistent with the magnitude and phase of the voltage and current output by the boost and current increasing device, the relay protection and secondary circuit wiring in the series and parallel circuits meet the requirements; otherwise, the relay protection and secondary circuit wiring in the series and parallel circuits do not meet the requirements.

Images