CN110888001A

CN110888001A - Direct-current network voltage mutation test device and implementation method of direct-current network voltage mutation test

Info

Publication number: CN110888001A
Application number: CN201811056378.8A
Authority: CN
Inventors: 王长亮; 邢猛; 荣展晖; 高连升; 赵建伟; 程浩; 徐丽宾; 徐祥斌; 张英杰; 杜星锐
Original assignee: Zhuzhou CRRC Times Electric Co Ltd
Current assignee: Zhuzhou CRRC Times Electric Co Ltd
Priority date: 2018-09-11
Filing date: 2018-09-11
Publication date: 2020-03-17
Anticipated expiration: 2038-09-11
Also published as: CN110888001B

Abstract

The invention discloses a direct current network voltage mutation test device, which comprises an upper limit/lower limit voltage transmission module, wherein the input end of the upper limit/lower limit voltage transmission module is connected with a three-phase industrial power supply, and the output end of the upper limit/lower limit voltage transmission module is connected with a tested object, and the upper limit/lower limit voltage transmission module comprises: the upper limit/lower limit voltage setting submodule receives the upper limit/lower limit voltage setting instruction and the upper limit/lower limit voltage parameter and adjusts the output voltage value of the corresponding submodule into the upper limit/lower limit voltage required by the test; the upper limit/lower limit voltage control submodule controls the on-off of the submodule by utilizing the received upper limit/lower limit mutation mode instruction so as to obtain corresponding upper limit/lower limit voltage when a test is implemented; and the upper limit/lower limit voltage output sub-module is used for transmitting the upper limit/lower limit voltage to the tested object after acquiring the upper limit/lower limit voltage. The output voltage of the invention is little influenced by current, and can realize the network voltage mutation test under the no-load working condition of the tested object, and the voltage mutation range can achieve stepless regulation.

Description

Direct-current network voltage mutation test device and implementation method of direct-current network voltage mutation test

Technical Field

The invention relates to the technical field of rail transit control, in particular to a direct current network voltage jump test device and a method for realizing the direct current network voltage jump test.

Background

According to the requirements of the power converter for the rail transit rolling stock, the power converter for the rail transit rolling stock needs to carry out a network voltage sudden change test. The urban rail transit auxiliary converter is required to be capable of bearing sudden change of input voltage, and the input voltage jumps within the range of DC1500V +/-300V.

In the prior art, a voltage dividing resistor and a short-circuit switch are generally required to be connected in series at a direct-current voltage input end aiming at a network voltage sudden change test device, and a network voltage sudden change function is realized through resistance dividing and compacting. This approach has the following problems: 1. when the tested object has no load and no current, the network voltage mutation test cannot be carried out; 2. the range of the sudden change voltage is narrow, and if the sudden change voltage is connected with a large divider resistor in series, the sudden change voltage is unstable and is greatly influenced by current fluctuation; 3. the voltage dividing resistors need to be of various types, so that the test preparation time period is long; 4. a large amount of manpower and material resources are required to be consumed, the automation degree is low, and the test efficiency is low.

Disclosure of Invention

In order to solve the above technical problem, the present invention provides a dc network voltage jump test apparatus, including an upper limit/lower limit voltage transmission module for providing an upper limit/lower limit voltage required by a network voltage jump test, wherein an input end of the upper limit/lower limit voltage transmission module is connected to a three-phase industrial power supply, and an output end thereof is connected to a test object, and the apparatus includes: the upper limit/lower limit voltage setting submodule is used for receiving an upper limit/lower limit voltage setting instruction and an upper limit/lower limit voltage parameter, and regulating the output voltage value of the corresponding submodule into the upper limit/lower limit voltage according to the upper limit/lower limit voltage parameter and by using the upper limit/lower limit voltage setting instruction; the upper limit/lower limit voltage control submodule is connected with the upper limit/lower limit voltage setting submodule and is used for controlling the on-off of the upper limit/lower limit voltage control submodule by utilizing a received upper limit/lower limit mutation mode instruction so as to convey the upper limit/lower limit voltage obtained from the upper limit/lower limit voltage setting submodule during test implementation; and the upper limit/lower limit voltage output submodule is connected with the upper limit/lower limit voltage control submodule and is used for transmitting the upper limit/lower limit voltage to the tested object after the upper limit/lower limit voltage is obtained.

Preferably, the upper/lower limit voltage setting submodule includes: the upper limit/lower limit voltage regulating unit is used for receiving an upper limit/lower limit input power supply instruction, acquiring a three-phase alternating current power supply signal under the condition that the current instruction is effective, regulating the three-phase alternating current power supply signal and outputting an upper limit/lower limit alternating current voltage regulating signal matched with the acquired upper limit/lower limit voltage parameter, wherein the upper limit/lower limit voltage setting instruction comprises the upper limit/lower limit input power supply instruction; the upper limit/lower limit voltage transformation unit is connected with the upper limit/lower limit voltage regulation unit and is used for receiving an upper limit/lower limit voltage transformation control instruction, and under the condition that the current instruction is effective, the upper limit/lower limit alternating voltage regulation signal is subjected to voltage transformation processing through an electromagnetic induction principle to generate a corresponding upper limit/lower limit alternating voltage transformation signal, wherein the upper limit/lower limit voltage setting instruction further comprises the upper limit/lower limit voltage transformation control instruction; and the upper limit/lower limit rectifying unit is connected with the upper limit/lower limit voltage transformation unit and is used for rectifying the upper limit/lower limit alternating current voltage transformation signal to obtain the upper limit/lower limit voltage required by the network voltage mutation test.

Preferably, the upper/lower limit voltage setting submodule is further configured to receive an upper/lower limit voltage range instruction of a corresponding module, and set an output voltage range of the submodule to a range matching the upper/lower limit voltage according to the upper/lower limit voltage range instruction.

Preferably, the upper/lower limit transforming unit includes: an upper limit/lower limit transformer for transforming the upper limit/lower limit ac voltage adjustment signal for the current module; an upper/lower limit voltage range regulator connected to the output end of the upper/lower limit transformer, the upper/lower limit voltage range regulator including a first upper/lower limit breaker, a second upper/lower limit breaker and a third upper/lower limit breaker, wherein the first upper/lower limit breaker is configured to connect two sets of windings of the output end of the upper/lower limit transformer in series according to the received upper/lower limit voltage range command to provide the upper/lower limit voltage transmission module with an upper/lower limit voltage first range satisfying the upper/lower limit voltage, the second upper/lower limit breaker is combined with the third upper/lower limit breaker to provide the upper/lower limit voltage range command according to the received upper/lower limit voltage range command, connecting two groups of windings at the output end of the upper limit/lower limit transformer in parallel to provide a second upper limit/lower limit voltage range meeting the upper limit/lower limit voltage for the upper limit/lower limit voltage transmission module; and the upper limit/lower limit transformation circuit breaker is used for receiving the upper limit/lower limit transformation control instruction and closing the upper limit/lower limit transformation control instruction after the instruction is detected to be effective so as to provide corresponding upper limit/lower limit alternating voltage regulating signals for the upper limit/lower limit transformer.

Preferably, the upper/lower limit voltage adjusting unit includes: the upper limit/lower limit voltage regulating circuit breaker is connected with the three-phase industrial power supply and is used for receiving the upper limit/lower limit input power supply instruction, and closing the upper limit/lower limit voltage regulating circuit breaker after the instruction is detected to be effective so as to provide corresponding three-phase alternating current power supply signals for the upper limit/lower limit voltage regulator; and the upper limit/lower limit voltage regulator is connected with the upper limit/lower limit voltage regulating circuit breaker and is used for regulating the three-phase alternating current power supply signal according to the acquired upper limit/lower limit voltage parameter.

Preferably, the upper limit voltage output submodule is integrated in the first high-voltage-resistant diode; and the lower limit voltage output submodule is integrated in the second high-voltage-resistant diode.

On the other hand, the invention provides a system for realizing a direct current network voltage mutation test, which comprises the following components: the test device as described above; and the control device is connected with the upper limit/lower limit voltage transmission modules in the test device and used for generating an upper limit/lower limit voltage setting instruction and an upper limit/lower limit voltage parameter corresponding to the upper limit/lower limit voltage transmission modules and sending the upper limit/lower limit voltage setting instruction and the upper limit/lower limit voltage parameter to the test device, and generating an upper limit/lower limit sudden change mode instruction corresponding to the modules and transmitting the upper limit/lower limit sudden change mode instruction to the test device when a test is implemented so as to control the test device to execute a sudden change mode required by a direct current network voltage sudden change test.

Preferably, the mutation patterns include: and the control device is used for generating effective upper limit/lower limit sudden change mode instructions and respectively sending the effective upper limit/lower limit sudden change mode instructions to the upper limit/lower limit voltage conveying module when the upper limit sudden change lower limit voltage test is carried out, and further generating invalid upper limit sudden change mode instructions and effective lower limit sudden change mode instructions after a preset switching time threshold value and respectively sending the invalid upper limit sudden change mode instructions and effective lower limit sudden change mode instructions to the upper limit/lower limit voltage conveying module.

Preferably, the mutation patterns include: the control device is used for generating an invalid upper limit sudden change mode command and an effective lower limit sudden change mode command and respectively sending the invalid upper limit sudden change mode command and the effective lower limit sudden change mode command to the upper limit/lower limit voltage conveying module when a lower limit sudden change upper limit voltage test is carried out, and further generating the effective upper limit/lower limit sudden change mode command and respectively sending the effective upper limit/lower limit sudden change mode command to the upper limit/lower limit voltage conveying module after a preset switching time threshold.

In addition, the invention also provides a method for implementing the direct current network voltage mutation test, wherein the implementation method utilizes the implementation system to perform the corresponding direct current network voltage mutation test on the tested product, and the implementation method comprises the following steps: the method comprises the following steps that firstly, a control device generates an upper limit/lower limit voltage setting instruction and an upper limit/lower limit voltage parameter corresponding to an upper limit/lower limit voltage conveying module in a test device and sends the upper limit/lower limit voltage setting instruction and the upper limit/lower limit voltage parameter to the test device; secondly, an upper limit/lower limit voltage setting submodule in the test device receives the upper limit/lower limit voltage setting instruction and the upper limit/lower limit voltage parameter, and adjusts the output voltage value of the corresponding submodule into upper limit/lower limit voltage according to the upper limit/lower limit voltage parameter and by using the upper limit/lower limit voltage setting instruction; step three, when the test is implemented, the control device generates an upper limit/lower limit mutation mode instruction of a corresponding module and transmits the upper limit/lower limit mutation mode instruction to the test device so as to control the test device to execute a mutation mode required by the direct current network voltage mutation test; and fourthly, when the test is implemented, the upper limit/lower limit voltage control submodule in the test device controls the on-off of the upper limit/lower limit voltage control submodule by using the received upper limit/lower limit mutation mode instruction of the corresponding module so as to convey the upper limit/lower limit voltage obtained from the upper limit/lower limit voltage setting submodule, and further transmits the upper limit/lower limit voltage to the tested object after the upper limit/lower limit voltage output submodule in the test device obtains the upper limit/lower limit voltage.

Preferably, in step three, the mutation pattern comprises: the control device generates effective upper limit/lower limit sudden change mode instructions and respectively sends the effective upper limit/lower limit sudden change mode instructions to the upper limit/lower limit voltage conveying module when the upper limit sudden change lower limit voltage test is carried out; further, after a preset switching time threshold, the control device generates an invalid upper limit abrupt change mode command and an invalid lower limit abrupt change mode command, and respectively sends the commands to the upper limit/lower limit voltage transmission module.

Preferably, in step three, the mutation pattern comprises: when the lower limit voltage mutation upper limit voltage test is carried out, the control device generates an invalid upper limit mutation mode instruction and an effective lower limit mutation mode instruction and respectively sends the invalid upper limit mutation mode instruction and the effective lower limit mutation mode instruction to the upper limit/lower limit voltage conveying module; further, after a preset switching time threshold, the control device generates an effective upper limit/lower limit abrupt change mode command and sends the effective upper limit/lower limit abrupt change mode command to the upper limit/lower limit voltage transmission module respectively.

Compared with the prior art, one or more embodiments in the above scheme can have the following advantages or beneficial effects:

the invention provides a direct current network voltage mutation test device and a method for realizing the direct current network voltage mutation test. The test device adopts a voltage transformation and rectification processing method, directly adjusts the three-phase industrial power supply to the upper limit/lower limit voltage required by the sudden change network voltage test, and controls the on-off state of a corresponding upper limit/lower limit voltage control submodule in the upper limit/lower limit voltage transmission module to realize the jump function of sudden change voltage in the direct current network voltage sudden change test. The sudden change voltage output by the testing device is slightly influenced by current, the network voltage sudden change characteristic is hardened, and the network voltage sudden change test under the no-load working condition of a tested product can be realized. In addition, the test device related by the invention is characterized in that a corresponding upper limit/lower limit voltage range regulator is added in the upper limit/lower limit voltage conveying module, so that the upper limit/lower limit voltage conveying module can output voltage in a larger range, the voltage mutation range can further reach stepless regulation in a national standard range, the upper limit/lower limit voltage conveying module can output any range change of 0-2000V voltage, and the function that a tested product in a national standard of a network voltage mutation test needs to jump in DC1500V (plus or minus 300V) is met. Furthermore, the test device has high automation degree, only needs to be automatically set in the control device, and has short test time and high test efficiency.

While the invention will be described in connection with certain exemplary implementations and methods of use, it will be understood by those skilled in the art that it is not intended to limit the invention to these embodiments. On the contrary, the intent is to cover all alternatives, modifications and equivalents as included within the spirit and scope of the invention as defined by the appended claims.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural diagram of an implementation system of a direct-current network voltage mutation test in an embodiment of the present application.

Fig. 2 is a schematic structural diagram of a dc network voltage jump test apparatus 200 in an implementation system of a dc network voltage jump test in an embodiment of the present application.

Fig. 3 is a schematic diagram of a dc network voltage jump test apparatus 200 in an implementation system of a dc network voltage jump test in an embodiment of the present application.

Fig. 4 is a schematic circuit structure diagram of a dc network voltage jump test apparatus 200 in an implementation system of a dc network voltage jump test in the embodiment of the present application.

Fig. 5 is a step diagram of an implementation method of a dc network voltage jump test in the embodiment of the present application.

Fig. 6 is a specific flowchart of a method for implementing a dc network voltage jump test in the embodiment of the present application.

Detailed Description

The following detailed description of the embodiments of the present invention will be provided with reference to the drawings and examples, so that how to apply the technical means to solve the technical problems and achieve the technical effects can be fully understood and implemented. It should be noted that, as long as there is no conflict, the embodiments and the features of the embodiments of the present invention may be combined with each other, and the technical solutions formed are within the scope of the present invention.

Therefore, in order to overcome the defects of the prior art, the invention provides a device for a direct current network voltage mutation test and a method for realizing the direct current network voltage mutation test. The network voltage sudden change test device utilizes two paths of voltage transmission modules, directly converts an industrial universal three-phase power supply into upper limit/lower limit voltage required by a test through upper limit/lower limit voltage parameters respectively obtained by a control device, and further can realize flexible switching of the upper limit voltage and the lower limit voltage by obtaining a sudden change mode instruction, so that a corresponding network voltage sudden change test is completed. Each voltage transmission module is also provided with a voltage range regulator to realize the regulation of the voltage mutation range and can finish the arbitrary regulation of the range of the upper limit/lower limit voltage. In the test implementation process, the test device is set and controlled by instructions only through the control device, and the test process is simple and efficient.

Fig. 1 is a schematic structural diagram of an implementation system of a direct-current network voltage mutation test in an embodiment of the present application. As shown in fig. 1, the system includes a control device 100 and a test device 200. Wherein, the control device 100 is respectively connected with an upper limit voltage transmission module 210 and a lower limit voltage transmission module 220 in the test device 200, for generating an upper limit voltage setting command and an upper limit voltage parameter for the upper limit voltage delivery module 210 in a test preparation stage, and sets the command and lower limit voltage parameters for the lower limit voltage of the lower limit voltage delivery module 220, and respectively sent to the upper limit voltage delivery module 210 and the lower limit voltage delivery module 220 in the test apparatus 200, and generating an upper limit abrupt change mode command for the upper limit voltage transmission module 210 and a lower limit abrupt change mode command for the lower limit voltage transmission module 220 when the test is implemented, and respectively transmits the voltage to an upper limit voltage transmission module 210 and a lower limit voltage transmission module 220 in the test device 200, so as to control the test device 200 to execute the sudden change mode required by the direct-current network voltage sudden change test. The testing device 200 includes an upper limit voltage transmission module 210 and a lower limit voltage transmission module 220, which are respectively used for providing an upper limit voltage and a lower limit voltage required by a network voltage sudden change test for a tested object (the tested object: a locomotive converter). Specifically, the upper limit voltage transmission module 210 is configured to provide the upper limit voltage required by the network voltage jump test for the test object, and referring to fig. 4, an input end of the upper limit voltage transmission module is connected to a three-phase industrial power supply (380V), and an output end of the upper limit voltage transmission module is connected to two ends of the input end of the test object. Similarly, the lower limit voltage transmission module 220 is configured to provide the lower limit voltage required by the network voltage jump test for the test object, and referring to fig. 4, the input terminal of the lower limit voltage transmission module is connected to a three-phase industrial power supply (380V), and the output terminal of the lower limit voltage transmission module is connected to two ends of the input terminal of the test object.

The test apparatus 200 will be explained first. The upper limit voltage delivery module 210 in the test apparatus 200 includes at least an upper limit voltage setting submodule 211, an upper limit voltage control submodule 212, and an upper limit voltage output submodule 213. The upper limit voltage setting submodule 211 (see fig. 4) is configured to receive an upper limit voltage setting instruction and an upper limit voltage parameter for the upper limit voltage transmission module 210 in a test preparation stage, and adjust an output voltage value corresponding to the upper limit voltage setting submodule 211 to an upper limit voltage according to the upper limit voltage parameter and by using the upper limit voltage setting instruction, so as to output the output voltage. The upper limit voltage control submodule 212 is connected to the upper limit voltage setting submodule 211, and is configured to control on/off of the upper limit voltage control submodule 211 by using a received upper limit abrupt change mode instruction for the upper limit voltage transmission submodule 210 during test implementation, so as to transmit the upper limit voltage obtained from the upper limit voltage setting submodule 211. In one embodiment, in the case of receiving a valid upper limit abrupt change mode command, the upper limit voltage control submodule 211 is turned on, and transmits the upper limit voltage that the upper limit voltage setting submodule 211 needs to output to the upper limit voltage output submodule 213 described below. In another embodiment, in the case of receiving an invalid upper limit abrupt change mode command, the upper limit voltage control submodule 211 is controlled to maintain the off state, and the upper limit voltage which the upper limit voltage setting submodule 211 needs to output cannot be transmitted to the upper limit voltage output submodule 213 described below. The upper limit voltage output sub-module 213 is connected to the upper limit voltage control sub-module 212, and is configured to transmit the upper limit voltage to the test object after obtaining the upper limit voltage, so that the test object obtains the upper limit voltage matched with the upper limit voltage parameter required by the network voltage jump test.

Further, the lower limit voltage delivery module 220 at least includes a lower limit voltage setting sub-module 221, a lower limit voltage control sub-module 222 and a lower limit voltage output sub-module 223. The lower limit voltage setting submodule 221 (see fig. 4) is configured to receive a lower limit voltage setting instruction and a lower limit voltage parameter for the lower limit voltage transmission module 220 in a test preparation stage, and adjust an output voltage value corresponding to the lower limit voltage setting submodule 221 to a lower limit voltage according to the lower limit voltage parameter and by using the lower limit voltage setting instruction, so as to output the lower limit voltage. The lower limit voltage control submodule 222 is connected to the lower limit voltage setting submodule 221, and is configured to control, when a test is performed, on/off of the lower limit voltage control submodule 221 by using a received lower limit abrupt change mode instruction for the lower limit voltage transmission module 220, so as to transmit the lower limit voltage obtained from the lower limit voltage setting submodule 221. In one embodiment, in the case of receiving a valid lower limit abrupt change mode command, the lower limit voltage control sub-module 221 is turned on, and the lower limit voltage that the lower limit voltage setting sub-module 221 needs to output is transmitted to the lower limit voltage output sub-module 223 described below. In another embodiment, in the case of receiving an invalid upper limit abrupt change mode command, the lower limit voltage control sub-module 221 remains in the off state, and the lower limit voltage that the lower limit voltage setting sub-module 221 needs to output cannot be transmitted to the lower limit voltage output sub-module 223 described below. The lower limit voltage output sub-module 223 is connected to the lower limit voltage control sub-module 222, and is configured to transmit the lower limit voltage to the test object after obtaining the lower limit voltage, so that the test object obtains the lower limit voltage matched with the lower limit voltage parameter, which is required by the network voltage jump test.

In this way, the upper limit voltage control submodule 211 controls the on-off state of its own submodule by detecting the validity of the upper limit sudden change mode instruction and the validity of the lower limit sudden change mode instruction detected by the lower limit voltage control submodule 221, the upper limit voltage control submodule 211 receives the valid upper limit sudden change mode instruction, and the lower limit voltage control submodule 221 transmits the upper limit voltage which is set by the upper limit voltage setting submodule 211 and needs to be output to the upper limit voltage output submodule 213 under the condition of receiving the invalid lower limit sudden change mode instruction, so that the tested product obtains the upper limit voltage which is matched with the upper limit voltage parameter and is required by the network voltage sudden change test. In addition, when the lower limit voltage control submodule 221 receives an effective lower limit sudden change mode instruction and the upper limit voltage control submodule 211 receives an ineffective upper limit sudden change mode instruction, the lower limit voltage which is set by the lower limit voltage setting submodule 221 and needs to be output is transmitted to the lower limit voltage output submodule 223, so that the tested product obtains the lower limit voltage which is matched with the lower limit voltage parameter and is needed by the network voltage sudden change test. Furthermore, the instantaneous switching of the direct current network voltage can be realized by controlling the conversion of the effectiveness of the upper limit/lower limit mutation mode instruction, so that the function of direct current network voltage jump is realized.

Further, preferably, in one embodiment, as shown in fig. 4, in the upper limit voltage delivery module 210, the upper limit voltage control submodule 211 adopts an upper limit voltage output breaker 3QF 31. The upper limit voltage output submodule 213 is integrated in the first high voltage withstanding diode VD1, and specifically, the module 213 employs a first high voltage withstanding diode VD 1. In the lower limit voltage delivery module 220, the lower limit voltage control submodule 221 employs a lower limit voltage output breaker 4QF 31. The lower limit voltage output submodule 223 is integrated in the second high voltage tolerant diode VD2, and further, the module 223 employs a second high voltage tolerant diode VD 2.

Fig. 3 is a schematic diagram of a dc network voltage jump test apparatus 200 in an implementation system of a dc network voltage jump test in an embodiment of the present application. As shown in fig. 3, the present invention regards the upper limit voltage setting submodule 211 and the lower limit voltage setting submodule 221 as the DC source input DC1 and DC2, respectively, to output the upper limit voltage and the lower limit voltage required by the network voltage jump test, and outputs the upper limit/lower limit voltage of two different potentials to the tested object by controlling the on-off states of the upper limit voltage control submodule 211, which can be regarded as the switch K1, and the lower limit voltage control submodule 221, which can be regarded as the switch K2, according to the principle that the upper limit voltage output submodule 213 integrated in the first high voltage withstanding diode VD1 and the lower limit voltage output submodule 223 integrated in the second high voltage withstanding diode VD2 are turned on and off at low potentials. Further, the instantaneous switching of the direct current network voltage is realized by controlling the switching control of the switch K1 and the switch K2, so that the function of jumping of the direct current network voltage is realized.

When the upper limit voltage control submodule 211 which can be regarded as the switch K1 and the lower limit voltage control submodule 221 which can be regarded as the switch K2 are both in a conducting state, or the upper limit voltage control submodule 211 which can be regarded as the switch K1 is in a conducting state and the lower limit voltage control submodule 221 which can be regarded as the switch K2 is in a disconnecting state, the testing device 200 outputs the upper limit voltage corresponding to the upper limit voltage parameter to the tested product. When the upper limit voltage control submodule 211, which can be regarded as the switch K1, is controlled to be in the off state and the lower limit voltage control submodule 221, which can be regarded as the switch K2, is controlled to be in the on state, the testing device 200 outputs the lower limit voltage corresponding to the lower limit voltage parameter to the tested object. In order to prevent the voltage interruption phenomenon during the experiment in which the test apparatus 200 performs the short-time sudden change of the upper limit voltage to the lower limit voltage or the short-time sudden change of the lower limit voltage to the upper limit voltage, it is preferable that the test apparatus 200 outputs the corresponding upper limit voltage to the test object by using the principle that the high potential of the first high voltage withstanding diode VD1 in the upper limit voltage output submodule 213 and the low potential of the second high voltage withstanding diode VD2 in the lower limit voltage output submodule 223 are turned on and off so that the upper limit voltage control submodule 211 which can be regarded as the switch K1 and the lower limit voltage control submodule 221 which can be regarded as the switch K2 are both controlled to be in the on state. Therefore, in the process of switching the upper limit voltage and the lower limit voltage, the sudden voltage jump process can be completed only by controlling the on-off state of the upper limit voltage control submodule 211 which can be regarded as the switch K1, so that the voltage interruption phenomenon is limited.

Because the sudden-change voltage device of the network voltage sudden-change test in the prior art mostly utilizes a direct current source input mode of a series/parallel voltage-dividing resistor, and the adjustable range of the sudden-change voltage is narrow, the upper limit/lower limit voltage setting sub-modules 211 and 221 which can be regarded as the direct current source input end in the upper limit/lower limit voltage conveying modules 210 and 220 related by the invention can realize the setting of the upper limit/lower limit voltage range of a voltage transformation part through the voltage regulation, voltage transformation and rectification parts, so that the upper limit/lower limit voltage conveying modules 210 and 220 can realize the voltage range meeting the national standard requirements of the network voltage sudden-change test. Preferably, the upper/lower voltage delivery modules 210, 220 each have an upper/lower first range and an upper/lower second range adapted to match the infinitely adjustable output voltage. The first upper/lower limit range is a range corresponding to the output voltage of the upper/lower limit voltage transfer modules 210 and 220 being 1000V or higher, and the second upper/lower limit range is a range corresponding to the output voltage of the upper/lower limit voltage transfer modules 210 and 220 being 1000V or lower and 500V or higher. In the testing apparatus 200 of the embodiment of the present invention, the upper/lower limit voltage transmitting modules 210 and 220 can output an arbitrarily set upper/lower limit voltage within a range of 0 to 2000V.

Further, the upper limit voltage setting submodule 211 in the upper limit voltage transmission module 210 can be further configured to receive an upper limit voltage range instruction for the upper limit voltage transmission module 210, and set an output voltage range of the submodule 211 to a range that matches the acquired upper limit voltage according to the upper limit voltage range instruction. The upper limit voltage range instruction comprises an upper limit voltage first range instruction or an upper limit voltage second range instruction.

Further, the lower limit voltage setting submodule 221 in the lower limit voltage transmission module 220 can be further configured to receive a lower limit voltage range instruction for the lower limit voltage transmission module 220, and set an output voltage range of the submodule 221 to a range matching the acquired lower limit voltage according to the lower limit voltage range instruction. The lower limit voltage range instruction comprises a lower limit voltage first range instruction or a lower limit voltage second range instruction.

In the test preparation phase, the control device 100 may be further configured to generate an upper limit voltage range command for the upper limit voltage transmission module 210 and a lower limit voltage range command for the lower limit voltage transmission module 220, and (simultaneously) transmit the upper limit voltage range command and the lower limit voltage range command to the test device 200.

Fig. 2 is a schematic structural diagram of a dc network voltage jump test apparatus 200 in an implementation system of a dc network voltage jump test in an embodiment of the present application. Fig. 4 is a schematic circuit structure diagram of a dc network voltage jump test apparatus 200 in an implementation system of a dc network voltage jump test in the embodiment of the present application. The function and internal structure of the upper limit voltage setting submodule 211 in the upper limit voltage delivery module 210 and the lower limit voltage setting submodule 221 in the lower limit voltage delivery module 220 will be described with reference to fig. 2 and 4.

Referring to fig. 2 and 4, the upper limit voltage setting submodule 211 includes an upper limit voltage regulating unit 2111, an upper limit transforming unit 2112, and an upper limit rectifying unit 2113. The upper limit voltage regulating unit 2111 is configured to receive an upper limit input power instruction for the upper limit voltage transmission module 210, acquire a three-phase alternating-current power signal (380V) when the upper limit input power instruction is valid, regulate the three-phase alternating-current power signal, and output an upper limit alternating-current voltage regulating signal matched with the acquired upper limit voltage parameter. Further, the upper limit voltage setting command includes an upper limit input power command. The upper limit transforming unit 2112 is connected to the upper limit voltage regulating unit 2111, and is configured to receive an upper limit transforming control instruction for the upper limit voltage transmission module 210, and perform transforming processing on the upper limit ac voltage regulating signal acquired from the upper limit voltage regulating unit 2111 through an electromagnetic induction principle under the condition that the upper limit transforming control instruction is valid, so as to generate a corresponding upper limit ac transforming signal. Further, the upper limit voltage setting instruction further comprises an upper limit voltage transformation control instruction. The upper limit rectification unit 2113 is connected to the upper limit transforming unit 2112, and is configured to rectify the corresponding upper limit ac transforming signal acquired from the upper limit transforming unit 2112 to obtain an upper limit voltage required by the dc network voltage mutation test, and to transmit the upper limit voltage to the test object. In this way, the upper limit voltage transmission module 210 directly adjusts the three-phase industrial power supply to the upper limit voltage required by the grid voltage sudden change test in a voltage transformation and rectification manner through the internal upper limit voltage setting submodule 211, and compared with the manner of realizing direct current power supply input through a voltage dividing resistor, the mode is less influenced by current, and the grid voltage sudden change characteristic is hard, so that the grid voltage sudden change test under the no-load working condition of the tested product can be realized.

Specifically, the upper limit voltage regulating unit 2111 includes: the three-phase industrial power supply system comprises an upper limit voltage regulating circuit breaker 3QF11 connected with a three-phase industrial power supply and an upper limit voltage regulator 3TM1 connected with an upper limit voltage regulating circuit breaker 3QF 11. The upper limit voltage regulating circuit breaker 3QF11 is used for receiving an upper limit input power supply instruction, and is closed after the upper limit input power supply instruction is detected to be effective, so that a three-phase alternating current power supply signal (380V) is provided for the upper limit voltage regulator 3TM 1. The upper limit voltage regulator 3TM1 is configured to adjust a three-phase ac power supply signal according to the acquired upper limit voltage parameter, and adjust an output signal of the upper limit voltage regulator 3TM1 to an ac voltage adjustment signal matching the upper limit voltage parameter. It should be noted that the upper limit voltage parameter is not a parameter that is required by the test and whose upper limit voltage value is consistent, but is an upper limit voltage setting information (that is, an upper limit voltage value required by the test) required by the test, which is obtained by the control device 100, and according to the upper limit voltage regulating unit 2111 and the relevant transformer turn proportion in the upper limit transforming unit 2112, the upper limit voltage parameter is obtained, so that the upper limit voltage regulator 3TM1 in the upper limit voltage regulating unit 2111 adjusts its output voltage to an output voltage matched with the upper limit voltage parameter after obtaining the corresponding upper limit voltage parameter, and the upper limit voltage transmission module 210 can output the upper limit voltage value required by the test.

Further, as shown in fig. 4, the upper limit transforming unit 2112 includes: an upper limit transformer 3TM2 connected to the upper limit regulator 3TM1, and an upper limit transformer breaker 3QF21 connected to the upper limit transformer 3TM 2. The upper limit transformer 3TM2 is configured to transform an ac voltage adjustment signal obtained from the upper limit voltage regulator 3TM1 in accordance with the turn ratio of the primary coil and the secondary coil inherent to the device, and generate a corresponding upper limit ac transformation signal. Preferably, the upper limit transformer 3TM2 in one embodiment employs a three-winding transformer, in which one winding is the primary input coil of the upper limit transformer 3TM2 and the other two windings are the secondary output coils of the upper limit transformer 3TM 2.

The upper limit voltage transformation breaker 3QF21 has one end connected to the upper limit voltage regulating unit 2111 and the other end connected to the primary coil at the input end of the upper limit transformer 3TM2, and is configured to receive an upper limit voltage transformation control command for the upper limit voltage transmission module 210, and close after detecting that the upper limit voltage transformation control command is valid, so that the upper limit ac voltage regulating signal subjected to voltage regulation processing acquired from the upper limit voltage regulating unit 2111 is transmitted to the upper limit transformer 3TM2, and a corresponding upper limit ac voltage regulating signal for voltage transformation processing is provided for the upper limit transformer 3TM 2.

In addition, in one embodiment, it is preferable that the upper limit transforming unit 2112 further includes an upper limit voltage range regulator 3KM3 connected to the upper limit transformer 3TM 2. The upper limit voltage range regulator 3KM3 is connected to the secondary winding of the output terminal of the upper limit transformer 3TM2, and includes: a first upper limit breaker 3KM31, a second upper limit breaker 3KM32, and a third upper limit breaker 3KM 33. The first upper limit circuit breaker 3KM31 is configured to connect two sets of windings at the output end of the upper limit transformer 3TM2 in series (upper limit voltage range series mode) to provide a first range (upper limit voltage first range) satisfying the upper limit voltage for the corresponding upper limit voltage transmission module 210; the second upper limit breaker 3KM32 is associated with the third upper limit breaker 3KM33 for connecting the two sets of windings at the output of the upper limit transformer 3TM2 in parallel (upper limit voltage range parallel mode) to provide the corresponding upper limit voltage delivery module 210 with the first range (upper limit voltage second range) satisfying the upper limit voltage.

Further, the upper limit voltage range regulator 3KM3 is configured to receive an upper limit voltage range command for the upper limit voltage delivery module 210, and set the output voltage range of the upper limit transformer 3TM2 to a range matching the upper limit voltage required for the test, according to the upper limit voltage range command. That is, the upper limit voltage range regulator 3KM3 is configured to receive and recognize an upper limit voltage range command for the upper limit voltage delivery module 210, and adjust the transformation ratio of the upper limit transformer 3TM2 according to the upper limit voltage range command, so that the upper limit transformer 3TM2 outputs an upper limit alternating current transformation signal matching a preset upper limit voltage range pattern. Specifically, when receiving an upper limit voltage range command as an upper limit voltage first range command, where the upper limit voltage first range command includes a valid first upper limit breaker command, an invalid second upper limit breaker command, and an invalid third upper limit breaker command, the upper limit voltage range regulator 3KM3 drives the first upper limit breaker 3KM31 to close, the second upper limit breaker 3KM32 to open, and the third upper limit breaker 3KM33 to open, respectively, so that two sets of windings at the output end of the upper limit transformer 3TM2 are connected in series (upper limit voltage range series mode). In this way, the turn ratio of the primary and secondary coils of the transformation process of the upper limit transformer 3TM2 is increased, so that a transformation result with a larger voltage value can be output under the condition that the input voltage is the same, and the purpose of expanding the abrupt voltage range of the upper limit voltage transmission module 210 is achieved, so that the function of outputting the upper limit voltage of more than 1000V can be realized according to the selected turn ratio of the primary and secondary coils of the upper limit transformer 3TM 2. In addition, when receiving an upper limit voltage range command as an upper limit voltage second range command, wherein the upper limit voltage second range command includes an invalid first upper limit breaker command, a valid second upper limit breaker command and a valid third upper limit breaker command, the upper limit voltage second range command drives the first upper limit breaker 3KM31 to open, the second upper limit breaker 3KM32 to close and the third upper limit breaker 3KM33 to close respectively, so that two groups of windings at the output end of the upper limit transformer 3TM2 are connected in parallel (upper limit voltage range parallel mode), so that the turn ratio of the primary and secondary coils of the transformation process of the upper limit transformer 3TM2 is adjusted to be in parallel connection mode compared with the upper limit voltage range series mode, thereby realizing that the output can be compared with the upper limit voltage first range by the selected turn ratio of the primary and secondary coils of the upper limit transformer 3TM2, a smaller upper limit voltage of 1000V or less. Therefore, the ratio of the input voltage and the output voltage of the transformer is reduced aiming at the upper limit voltage below 1000V, and the accurate adjustment aiming at the upper limit voltage below 1000V is realized.

As shown in fig. 2 and 4, the upper limit rectification unit 2113 includes an upper limit rectifier 21131 connected to the output terminal of the upper limit voltage range regulator 3KM3 in the upper limit transforming unit 2112, and an upper limit detector 21132 connected to the upper limit rectifier 21131. The upper limit rectifier 21131 is configured to rectify the transformed upper limit ac transformation signal obtained from the upper limit transformation unit 2112, and output a rectification result corresponding to the upper limit voltage, that is, output the upper limit voltage required for the corresponding test. The upper limit rectifier 21131 is integrated in the existing rectifier cabinet, and a corresponding direct current output signal (upper limit voltage) is obtained after the rectification processing process is completed. Specifically, as shown in fig. 4, the upper limit rectifier 21131 includes: fuse FU121-123, voltage-sharing resistor RS121-123, rectifier diode VT101-106, current-limiting resistor RS111, filter capacitor C111, discharge resistor R1, etc. Since the upper limit rectifier 21131 is a common device in the prior art, it is not described in detail here.

The upper limit detector 21132 is provided at the output of the upper limit rectifier 21131, as shown in fig. 4, and includes: the upper limit voltage sensor BV11 and the upper limit current sensor BA11 are respectively used for measuring the voltage (value) and the current (value) output by the upper limit voltage setting sub-module 211 in the upper limit voltage transmission module 210, so that experiment implementers can monitor the upper limit voltage condition (input to a tested article) in the process of test preparation and/or implementation.

In addition, referring again to fig. 2 and 4, the upper limit voltage setting submodule 211 also includes an upper limit line protection submodule 214 located between the upper limit voltage setting submodule 211 and the upper limit voltage control submodule 212. The upper limit line protection submodule 214 adopts an upper limit line protection circuit breaker 3FU51, which is used for detecting the current of the line where the upper limit voltage transmission module 210 is located, and when the current flowing through the upper limit voltage transmission module 210 is higher than a preset upper limit protection current threshold, the upper limit line protection submodule 211 (the upper limit line protection circuit breaker 3FU51 therein) is turned off to protect the path where the upper limit voltage transmission module 210 is located.

Referring to fig. 2 and 4, the lower limit voltage setting sub-module 221 includes a lower limit voltage adjusting unit 2211, a lower limit transforming unit 2212, and a lower limit rectifying unit 2213. The lower limit voltage regulating unit 2211 is configured to receive a lower limit input power instruction for the lower limit voltage transmission module 220, acquire a three-phase ac power signal (380V) when the lower limit input power instruction is valid, regulate the three-phase ac power signal, and output a lower limit ac voltage regulating signal matched with the acquired lower limit voltage parameter. Further, the lower limit voltage setting command includes a lower limit input power command. The lower limit voltage transformation unit 2212 is connected to the lower limit voltage adjustment unit 2211, and is configured to receive a lower limit voltage transformation control instruction for the lower limit voltage transmission module 220, and perform voltage transformation processing on the lower limit ac voltage adjustment signal acquired from the lower limit voltage adjustment unit 2211 by using an electromagnetic induction principle under the condition that the lower limit voltage transformation control instruction is valid, so as to generate a corresponding lower limit ac voltage transformation signal. Further, the lower limit voltage setting instruction further includes a lower limit voltage transformation control instruction. The lower limit rectifying unit 2213 is connected to the lower limit transforming unit 2212, and is configured to rectify the corresponding lower limit ac transforming signal obtained from the lower limit transforming unit 2212 to obtain a lower limit voltage required by the dc network voltage mutation test, and to transmit the lower limit voltage to the test object. In this way, the lower limit voltage transmission module 220 directly adjusts the three-phase industrial power supply to the lower limit voltage required by the network voltage sudden change test in a voltage transformation and rectification manner through the internal lower limit voltage setting submodule 221, and compared with the manner of realizing direct current power supply input through a voltage dividing resistor, the mode is less influenced by current, the network voltage sudden change characteristic is hard, and the network voltage sudden change test under the no-load working condition of the tested object can be realized.

Specifically, the lower limit voltage adjusting unit 2211 includes: a lower limit voltage regulating breaker 4QF11 connected with the three-phase industrial power supply and a lower limit voltage regulator 4TM1 connected with the lower limit voltage regulating breaker 4QF 11. The lower limit voltage regulating circuit breaker 4QF11 is used for receiving a lower limit input power supply instruction, and is closed after detecting that the lower limit input power supply instruction is effective, so as to provide a three-phase alternating current power supply signal (380V) for the lower limit voltage regulator 4TM 1. The lower limit voltage regulator 4TM1 is configured to adjust a three-phase ac power supply signal according to the acquired lower limit voltage parameter, and adjust an output signal of the lower limit voltage regulator 4TM1 to an ac voltage adjustment signal matching the lower limit voltage parameter. It should be noted that the lower limit voltage parameter is not a parameter that is required by the test and is identical to the lower limit voltage value required by the test, and is the lower limit voltage setting information (that is, the lower limit voltage value required by the test) required by the test this time is acquired by the control device 100, and the output voltage of the lower limit voltage regulator 4TM1 in the lower limit voltage regulating unit 2211 is adjusted to the output voltage matched with the lower limit voltage parameter after the corresponding lower limit voltage parameter is acquired according to the relevant transformer turn ratio in the lower limit voltage regulating unit 2211 and the lower limit voltage transforming unit 2212 in the present invention, so that the lower limit voltage transmission module 220 can output the lower limit voltage value required by the test this time.

Further, as shown in fig. 4, the lower limit transforming unit 2212 includes: a lower limit transformer 4TM2 connected to the lower limit regulator 4TM1, and a lower limit transformer breaker 4QF21 connected to the lower limit transformer 4TM 2. The lower limit transformer 4TM2 is configured to transform the ac voltage adjustment signal obtained from the lower limit voltage regulator 4TM1 in accordance with the turn ratio of the primary coil and the secondary coil inherent to the device, and generate a corresponding lower limit ac transformation signal. Preferably, in one embodiment, the lower limit transformer 4TM2 is a three-winding transformer, wherein one winding is the primary input coil of the lower limit transformer 4TM2, and the other two windings are the secondary output coils of the lower limit transformer 4TM 2.

One end of the lower limit transformer breaker 4QF21 is connected to the lower limit voltage regulating unit 2211, and the other end is connected to the primary coil of the input end of the lower limit transformer 4TM2, and is configured to receive a lower limit transformer control command for the lower limit voltage transmission module 220, and close after detecting that the lower limit transformer control command is valid, so that the lower limit ac voltage regulating signal subjected to voltage regulating processing acquired from the lower limit voltage regulating unit 2211 is transmitted to the lower limit transformer 4TM2, and the lower limit transformer 4TM2 is provided with a corresponding lower limit ac voltage regulating signal for voltage transformation processing.

In addition, in one embodiment, it is preferable that the lower limit transforming unit 2212 further includes a lower limit voltage range regulator 4KM3 connected to the lower limit transformer 4TM 2. The lower limit voltage range regulator 4KM3 is connected to the secondary winding of the output terminal of the lower limit transformer 4TM2, and includes: a first lower limit breaker 4KM31, a second lower limit breaker 4KM32, and a third lower limit breaker 4KM 33. The first lower limit circuit breaker 4KM31 is configured to connect two sets of windings at the output end of the lower limit transformer 4TM2 in series (lower limit voltage range series mode) to provide a first range (lower limit voltage first range) satisfying the lower limit voltage for the corresponding lower limit voltage transmission module 220; the second lower limit breaker 4KM32 is associated with the third lower limit breaker 4KM33 for connecting two sets of windings in parallel at the output of the lower limit transformer 4TM2 (lower limit voltage range parallel mode) to provide the corresponding lower limit voltage delivery module 220 with the first range (lower limit voltage second range) satisfying the lower limit voltage.

Further, the lower limit voltage range regulator 4KM3 is configured to receive a lower limit voltage range command for the lower limit voltage delivery module 220, and set the output voltage range of the lower limit transformer 4TM2 to a range matching the lower limit voltage required for the test according to the lower limit voltage range command. That is, the lower limit voltage range regulator 4KM3 is configured to receive and recognize a lower limit voltage range command for the lower limit voltage delivery module 220, and adjust the transformation ratio of the lower limit transformer 4TM2 according to the lower limit voltage range command, so that the lower limit transformer 4TM2 outputs a lower limit alternating current transformation signal matching the preset lower limit voltage range pattern. Specifically, when receiving a lower limit voltage range command as a lower limit voltage first range command, the lower limit voltage first range command includes a valid first lower limit breaker command, an invalid second lower limit breaker command, and an invalid third lower limit breaker command, the lower limit voltage range regulator 4KM3 drives the first lower limit breaker 4KM31 to close, the second lower limit breaker 4KM32 to open, and the third lower limit breaker 4KM33 to open, respectively, so that two sets of windings at the output end of the lower limit transformer 4TM2 are connected in series (lower limit voltage range series mode). In this way, the turn ratio of the primary and secondary coils of the transformation process of the lower limit transformer 4TM2 is increased, so that a transformation result with a larger voltage value can be output under the condition that the input voltage is the same, and the purpose of expanding the abrupt voltage range of the lower limit voltage transmission module 220 is achieved, so that the function of outputting the lower limit voltage of more than 1000V can be realized according to the selected turn ratio of the primary and secondary coils of the lower limit transformer 4TM 2. In addition, when receiving a lower limit voltage range command as a lower limit voltage second range command, wherein the lower limit voltage second range command includes an invalid first lower limit breaker command, a valid second lower limit breaker command and a valid third lower limit breaker command, the lower limit voltage second range regulator 4KM3 drives the first lower limit breaker 4KM31 to be opened, the second lower limit breaker 4KM32 to be closed and the third lower limit breaker 4KM33 to be closed, respectively, so that two groups of windings at the output end of the lower limit transformer 4TM2 are connected in parallel (lower limit voltage range parallel mode), and the turn ratio of the primary and secondary coils of the transformation processing of the lower limit transformer 4TM2 is adjusted to be parallel connection mode compared with the upper limit voltage range series mode, so that the output can be realized compared with the lower limit voltage first range by the selected turn ratio of the primary and secondary coils of the lower limit transformer 4TM2, a lower limit voltage of 1000V or less, which is a smaller range. Therefore, the lower limit voltage below 1000V is accurately adjusted by reducing the ratio of the input voltage to the output voltage of the transformer.

As shown in fig. 2 and 4, the lower limit rectifying unit 2213 includes a lower limit rectifier 22131 connected to the output terminal of the lower limit voltage range regulator 4KM3 in the lower limit transforming unit 2212, and a lower limit detector 22132 connected to the lower limit rectifier 22131. The lower limit rectifier 22131 is configured to rectify the transformed lower limit ac transformation signal obtained from the lower limit transforming unit 2212, and output a rectification result corresponding to the lower limit voltage, that is, output the lower limit voltage required for the test. The lower limit rectifier 22131 is integrated in the existing rectifier cabinet, and a corresponding direct current output signal (lower limit voltage) is obtained after the rectification process is completed. Specifically, as shown in fig. 4, the lower limit rectifier 22131 includes: fuse FU221-223, voltage-sharing and voltage-sharing resistor RS221-223, rectifier diode VT201-206, current-limiting resistor RS211, filter capacitor C211, discharge resistor R2 and the like. Since the upper limit rectifier 21131 is a common device in the prior art, it is not described in detail here.

The lower limit detector 22132 is located at the output of the lower limit rectifier 22131, and as shown in fig. 4, includes: the lower limit voltage sensor BV21 and the lower limit current sensor BA21 are respectively used for measuring the voltage (value) and the current (value) output by the lower limit voltage setting sub-module 221 in the lower limit voltage transmission module 220, so that an experiment implementer can monitor the condition of the lower limit voltage (input to a tested article) in the process of test preparation and/or implementation.

In addition, referring again to fig. 2 and 4, the lower limit voltage setting sub-module 221 further includes a lower limit line protection sub-module 224 located between the lower limit voltage setting sub-module 221 and the lower limit voltage control sub-module 222. The lower limit line protection sub-module 224 employs a lower limit line protection breaker 4FU51, and is configured to detect a current of a line where the lower limit voltage transmission module 220 is located, and when the current flowing through the lower limit voltage transmission module 220 is higher than a preset lower limit protection current threshold, the lower limit line protection sub-module 221 (the lower limit line protection breaker 4FU51 therein) is turned off to protect a path where the lower limit voltage transmission module 220 is located.

As shown in fig. 4, an abrupt change state detector 230 is connected between the output terminals of the upper limit voltage delivery module 210 and the lower limit voltage delivery module 220 and the input terminal of the test object. As shown in fig. 4, the abrupt change state detector 230 includes an abrupt change current sensor BA31 and an abrupt change voltage sensor BV31, which are respectively used for measuring an abrupt change current (value) and an abrupt change voltage (value) input to the test object by the testing apparatus 200 during the implementation of the direct current network voltage abrupt change test, so that an experiment implementer can monitor the upper limit/lower limit voltage input to the test object during the implementation of the test.

Next, the control device 100 will be described in detail. In the test preparation phase, the control device 100 obtains test input information required by a test (where the test input information includes upper limit voltage setting information, lower limit voltage setting information, an upper limit voltage setting instruction, a lower limit voltage setting instruction, upper limit voltage range mode information, and lower limit voltage range mode information required by the test), generates corresponding upper limit voltage setting instruction, lower limit voltage setting instruction, upper limit voltage parameter, and lower limit voltage parameter according to the obtained test input information, further sends the upper limit voltage setting instruction and the upper limit voltage parameter for the upper limit voltage transmission module 210 to the upper limit voltage transmission module 210, and sends the lower limit voltage setting instruction and the lower limit voltage parameter for the lower limit voltage transmission module 220 to the lower limit voltage transmission module 220. Further, in a test preparation stage, an effective upper limit input power instruction and an effective upper limit transformation control instruction need to be sent to the upper limit voltage regulation circuit breaker 3QF11 and the upper limit transformation circuit breaker 3QF21 in the upper limit voltage transmission module 210, so that the upper limit voltage regulation circuit breaker 3QF11 and the upper limit transformation circuit breaker 3QF21 in the upper limit voltage transmission module 210 are closed, and an upper limit voltage parameter needs to be sent to the upper limit voltage regulator 3TM1 in the upper limit voltage transmission module 210; and an effective lower limit input power instruction and an effective lower limit transformation control instruction need to be sent to the lower limit voltage regulating circuit breaker 4QF11 and the lower limit transformation circuit breaker 4QF21 in the lower limit voltage transmission module 220, so that the lower limit voltage regulating circuit breaker 4QF11 and the lower limit transformation circuit breaker 4QF21 in the lower limit voltage transmission module 220 are closed, and a lower limit voltage parameter needs to be sent to the lower limit voltage regulator 4TM1 in the lower limit voltage transmission module 220. In this way, it is achieved that the upper limit voltage setting submodule 211 in the upper limit voltage delivery module 210 and the lower limit voltage setting submodule 221 in the lower limit voltage delivery module 220 are controlled by the control device 100 to output the upper limit voltage (upper limit voltage setting information) and the lower limit voltage (lower limit voltage setting information) required for the test acquired by the control device 100, respectively.

Further, in the test preparation phase, the control device 100 may generate an upper limit voltage setting instruction, a lower limit voltage setting instruction, an upper limit voltage parameter, and a lower limit voltage parameter for the test, and may also generate an upper limit voltage range instruction for the upper limit voltage delivery module 210 and send the upper limit voltage range instruction to the upper limit voltage range regulator 3KM3 in the upper limit voltage delivery module 210 and generate a lower limit voltage range instruction for the lower limit voltage delivery module 220 and send the lower limit voltage range instruction to the lower limit voltage range regulator 4KM3 in the lower limit voltage delivery module 200 according to upper limit voltage range mode information (including an upper limit voltage range series mode and an upper limit voltage range parallel mode) and lower limit voltage range mode information (including a lower limit voltage range series mode and a lower limit voltage range parallel mode) in the obtained test input information.

Further, if the upper limit voltage (upper limit voltage setting information) required for the test satisfies the upper limit voltage first range, the upper limit voltage range regulator 3KM3 in the upper limit voltage delivery module 210 transmits a first upper limit breaker command including a valid upper limit breaker command for the first upper limit breaker 3KM31, an invalid second upper limit breaker command for the second upper limit breaker 3KM32, and an invalid third upper limit breaker command for the third upper limit breaker 3KM33, so as to drive the upper limit voltage range regulator 3KM3 to operate in the upper limit voltage range series mode.

Further, if the upper limit voltage (upper limit voltage setting information) required for the test satisfies the upper limit voltage second range, the upper limit voltage range regulator 3KM3 in the upper limit voltage delivery module 210 sends a first upper limit breaker command including invalid for the first upper limit breaker 3KM31, valid for the second upper limit breaker 3KM32, and valid for the third upper limit breaker 3KM33, so as to drive the upper limit voltage range regulator 3KM3 to operate in the upper limit voltage range parallel mode.

Further, if the lower limit voltage (lower limit voltage setting information) required for the test satisfies the lower limit voltage first range, the lower limit voltage range regulator 4KM3 in the lower limit voltage delivery module 220 sends a first lower limit breaker command including valid for the first lower limit breaker 4KM31, invalid for the second lower limit breaker 4KM32, and invalid for the third lower limit breaker 4KM33 to drive the lower limit voltage range regulator 4KM3 to operate as the lower limit voltage range series mode.

Further, if the lower limit voltage (lower limit voltage setting information) required for the test satisfies the lower limit voltage second range, the lower limit voltage range regulator 4KM3 in the lower limit voltage delivery module 220 sends a first lower limit breaker command including invalid for the first lower limit breaker 4KM31, valid for the second lower limit breaker 4KM32, and valid for the third lower limit breaker 4KM33 to drive the lower limit voltage range regulator 4KM3 to operate in the lower limit voltage range parallel mode.

In the test execution stage, the control device 100 acquires the mutation test of this pair including: the network pressure mutation test method comprises the steps of obtaining mutation mode information, test implementation requirement information of a test switching instruction and a test ending instruction, and generating an upper limit mutation mode instruction and a lower limit mutation mode instruction corresponding to a (current) mutation mode required by a network pressure mutation test according to the obtained test implementation requirement information. Wherein the (current) mutation pattern comprises: upper voltage abrupt lower limit voltage (mode), lower voltage abrupt upper limit voltage (mode) and test end (mode).

Specifically, in one embodiment, when performing the upper limit voltage abrupt change lower limit voltage (mode), the control device 100 generates an effective upper limit abrupt change mode command for the upper limit voltage transmission module 210 and an effective lower limit abrupt change mode command for the lower limit voltage transmission module 220, and sends the effective upper limit abrupt change mode command and the effective lower limit abrupt change mode command to the upper limit voltage control submodule 212 in the upper limit voltage transmission module 210 and the lower limit voltage control submodule 222 in the lower limit voltage transmission module 220 respectively, so that the upper limit voltage control submodule 212 and the lower limit voltage control submodule 222 are both turned on (both are in a conducting state), and the tested object first obtains the upper limit voltage output by the testing device 200. Further, after the preset switching time threshold, the control device 100 generates an invalid upper limit abrupt change mode command for the upper limit voltage transmission module 210 and an valid lower limit abrupt change mode command for the lower limit voltage transmission module 220, and sends the invalid upper limit abrupt change mode command and the valid lower limit abrupt change mode command to the upper limit voltage control submodule 212 in the upper limit voltage transmission module 210 and the lower limit voltage control submodule 222 in the lower limit voltage transmission module 220, respectively, so that the upper limit voltage control submodule 212 is turned off (in an off state) and the lower limit voltage transmission module 220 is turned on (in an on state), and the test object obtains the lower limit voltage output by the test device 200. In this way, the test apparatus 200 completes the test sudden change mode in which the upper limit voltage suddenly changes the lower limit voltage under the control of the control apparatus 100. It should be noted that the switching time threshold represents a time corresponding to a period from an output upper limit voltage to an output lower limit voltage of the testing apparatus 200 in the dc network voltage sudden change test, that is, a switching time of the sudden change voltage, and the length of the time is set according to a test requirement.

In one embodiment, when performing the lower limit voltage abrupt change of the upper limit voltage (mode), the control device 100 generates an invalid upper limit abrupt change mode command for the upper limit voltage transmission module 210 and an valid lower limit abrupt change mode command for the lower limit voltage transmission module 220, and sends the invalid upper limit abrupt change mode command and the valid lower limit abrupt change mode command to the upper limit voltage control submodule 212 in the upper limit voltage transmission module 210 and the lower limit voltage control submodule 222 in the lower limit voltage transmission module 220 respectively, so that the upper limit voltage control submodule 212 is turned off (in an off state) and the lower limit voltage transmission module 220 is turned on (in an on state), and the test object obtains the lower limit voltage output by the test device 200. Further, after the preset switching time threshold, the control device 100 generates an effective upper limit sudden change mode instruction for the upper limit voltage transmission module 210 and an effective lower limit sudden change mode instruction for the lower limit voltage transmission module 220, and sends the effective upper limit sudden change mode instruction and the effective lower limit sudden change mode instruction to the upper limit voltage control submodule 212 in the upper limit voltage transmission module 210 and the lower limit voltage control submodule 222 in the lower limit voltage transmission module 220, respectively, so that the upper limit voltage control submodule 212 and the lower limit voltage control submodule 222 are both turned on (both in a turned-on state), and the tested object first obtains the upper limit voltage output by the test device 200. In this way, the test apparatus 200 completes the test sudden change mode in which the lower limit voltage suddenly changes the upper limit voltage under the control of the control apparatus 100.

In order to prevent the voltage interruption phenomenon during the experiment in which the test apparatus 200 performs the short-time sudden change of the upper limit voltage to the lower limit voltage or the short-time sudden change of the lower limit voltage to the upper limit voltage, it is preferable that the test apparatus 200 outputs the corresponding upper limit voltage to the test object by using the principle that the first high voltage withstanding diode VD1 in the upper limit voltage output submodule 213 and the second high voltage withstanding diode VD2 in the lower limit voltage output submodule 223 are turned on and off at high and low potentials in a manner of controlling both the upper limit voltage control submodule 211 and the lower limit voltage control submodule 221 to be in an on state. Therefore, in the process of switching the upper limit voltage and the lower limit voltage, the process of sudden voltage jump can be completed only by controlling the on-off state of the upper limit voltage control submodule 211.

In one embodiment, when the test is completed (mode), the control device 100 generates an invalid upper limit abrupt change mode command for the upper limit voltage transmission module 210 and an invalid lower limit abrupt change mode command for the lower limit voltage transmission module 220, and sends the upper limit abrupt change mode command and the invalid lower limit abrupt change mode command to the upper limit voltage control submodule 212 in the upper limit voltage transmission module 210 and the lower limit voltage control submodule 222 in the lower limit voltage transmission module 220 respectively, so that the upper limit voltage control submodule 212 and the lower limit voltage transmission module 220 are both turned off (both in a turned-off state), and the test object cannot obtain the corresponding upper limit voltage or lower limit voltage from the test device 200. Further, after a preset end time threshold, the control device 100 transmits an upper limit input power command for invalidation of the upper limit regulator breaker 3QF11 in the upper limit voltage setting submodule 211, an upper limit transformation control command for invalidation of the upper limit transformer breaker 3QF21 in the upper limit voltage setting submodule 211, an upper limit voltage range command for invalidation of the upper limit voltage range regulator 3KM3 in the upper limit voltage setting submodule 211 (wherein the invalid upper limit voltage range commands include a first upper limit breaker command for invalidation of the first upper limit breaker 3KM31, a second upper limit breaker command for invalidation of the second upper limit breaker 3KM32, and a third upper limit breaker command for invalidation of the third upper limit breaker 3KM 33), and a lower limit input power command for invalidation of the lower limit regulator breaker 4QF11 in the lower limit voltage setting submodule 221 to the test device 200, Invalid lower limit transforming control instructions for the lower limit transforming circuit breaker 4QF21 in the lower limit voltage setting sub-module 221 and invalid lower limit voltage range instructions for the lower limit voltage range regulator 4KM3 in the lower limit voltage setting sub-module 221 (wherein the invalid lower limit voltage range instructions include invalid first lower limit circuit breaker instructions for the first lower limit circuit breaker 4KM31, invalid second lower limit circuit breaker instructions for the second lower limit circuit breaker 4KM32 and invalid third lower limit circuit breaker instructions for the third lower limit circuit breaker 4KM 33) to end the dc network voltage sudden change test of the current test piece.

On the other hand, the invention also provides an implementation method of the direct current network voltage mutation test, which utilizes the implementation system of the direct current network voltage mutation test to realize the direct current network voltage mutation test implemented on the tested product, wherein each device, module, sub-module, unit and the like related to the method have the functions of corresponding equipment in the implementation system of the direct current network voltage mutation test. Fig. 5 is a step diagram of an implementation method of a dc network voltage jump test in the embodiment of the present application. Fig. 6 is a specific flowchart of a method for implementing a dc network voltage jump test in the embodiment of the present application. This embodiment will be described with reference to fig. 5 and 6.

In step S510, in the test preparation phase, the control device 100 generates an upper limit voltage setting command and an upper limit voltage parameter corresponding to the upper limit voltage transfer module 210 in the test device 200, and generates a lower limit voltage setting command and a lower limit voltage parameter corresponding to the lower limit voltage transfer module 220 in the test device 200, and transmits them to the test device 200. Specifically, in the test preparation phase, first, in step S601, the control device 100 acquires test input information required for the test, where the test input information includes: the test method comprises the following steps of upper limit voltage setting information, lower limit voltage setting information, an upper limit voltage setting instruction, a lower limit voltage setting instruction, upper limit voltage range mode information and lower limit voltage range mode information required by the test. Then, the control device 100 generates an upper limit voltage setting command and an upper limit voltage parameter for the upper limit voltage transfer module 210 and a lower limit voltage setting command and a lower limit voltage parameter for the lower limit voltage transfer module 220 based on the test input information, transmits the upper limit voltage setting command and the upper limit voltage parameter for the upper limit voltage transfer module 210 to the upper limit voltage transfer module 210, and transmits the lower limit voltage setting command and the lower limit voltage parameter for the lower limit voltage transfer module 220 to the lower limit voltage transfer module 220.

Further, in the test preparation phase, in step S604, it is required to send an effective upper limit input power command and an effective upper limit transformation control command to the upper limit voltage regulation breaker 3QF11 and the upper limit transformation breaker 3QF21 in the upper limit voltage delivery module 210, respectively, so that the upper limit voltage regulation breaker 3QF11 and the upper limit transformation breaker 3QF21 in the upper limit voltage delivery module 210 are closed, and an upper limit voltage parameter is sent to the upper limit voltage regulator 3TM1 in the upper limit voltage delivery module 210; in step S605, it is necessary to send an effective lower limit input power command and an effective lower limit transformation control command to the lower limit regulation breaker 4QF11 and the lower limit transformation breaker 4QF21 in the lower limit voltage transportation module 220, respectively, so that the lower limit regulation breaker 4QF11 and the lower limit transformation breaker 4QF21 in the lower limit voltage transportation module 220 are closed, and a lower limit voltage parameter is sent to the lower limit regulator 4TM1 in the lower limit voltage transportation module 220. In this way, it is achieved that the upper limit voltage setting submodule 211 in the upper limit voltage delivery module 210 and the lower limit voltage setting submodule 221 in the lower limit voltage delivery module 220 are controlled by the control device 100 to output the upper limit voltage (upper limit voltage setting information) and the lower limit voltage (lower limit voltage setting information) required for the test acquired by the control device 100, respectively.

Further, in the test preparation phase, the control device 100 may generate an upper limit voltage setting instruction, a lower limit voltage setting instruction, an upper limit voltage parameter, and a lower limit voltage parameter for the test, and may also generate an upper limit voltage range instruction for the upper limit voltage delivery module 210 according to the upper limit voltage range mode information and the lower limit voltage range mode information in the obtained test input information, and execute step S602 before sending the corresponding upper limit voltage setting instruction and upper limit voltage parameter to the upper limit voltage delivery module 210, send an upper limit voltage range instruction matching the upper limit voltage range mode information to the upper limit voltage range regulator 3KM3 in the upper limit voltage delivery module 210, and similarly, also need to generate a lower limit voltage range instruction for the lower limit voltage delivery module 220, and before sending the corresponding lower limit voltage setting instruction and lower limit voltage parameter to the upper limit voltage delivery module 220, step S603 is performed to send a lower limit voltage range command matched with the lower limit voltage range pattern information to the lower limit voltage range regulator 4KM3 in the lower limit voltage delivery module 220.

Then, in step S520, the upper limit voltage setting submodule 210 in the test apparatus 200 receives the upper limit voltage setting command and the upper limit voltage parameter, adjusts the output voltage value of the upper limit voltage setting submodule 210 to the upper limit voltage for output based on the upper limit voltage parameter and by using the upper limit voltage setting command, and the lower limit voltage setting submodule 220 receives the lower limit voltage setting command and the lower limit voltage parameter, adjusts the output voltage value of the lower limit voltage setting submodule 220 to the lower limit voltage for output based on the lower limit voltage parameter and by using the lower limit voltage setting command.

Specifically, the upper limit voltage delivery module 210 proceeds to step S608, and further the upper limit voltage regulating circuit breaker 3QF11 and the upper limit voltage transformation circuit breaker 3QF21 in the upper limit voltage delivery module 210 receive the valid upper limit input power command and the valid upper limit voltage transformation control command, respectively, so that the upper limit voltage regulating circuit breaker 3QF11 and the upper limit voltage transformation circuit breaker 3QF21 are closed, and step S609 is performed, and the upper limit voltage regulator 3TM1 receives the upper limit voltage parameter, and adjusts the output voltage of the upper limit voltage regulator 3TM1 according to the upper limit voltage parameter, so that the upper limit voltage setting submodule 210 outputs the corresponding upper limit voltage (matches the upper limit voltage setting information).

Similarly, the lower limit voltage delivery module 220 proceeds to step S610, and further the lower limit voltage regulating circuit breaker 4QF11 and the lower limit voltage transforming circuit breaker 4QF21 in the lower limit voltage delivery module 220 receive the valid lower limit input power command and the valid lower limit voltage transforming control command, respectively, so that the lower limit voltage regulating circuit breaker 4QF11 and the lower limit voltage transforming circuit breaker 4QF21 are closed, and step S611 is performed, where the lower limit voltage regulator 4TM1 receives the lower limit voltage parameter, and adjusts the output voltage of the lower limit voltage regulator 4TM1 according to the lower limit voltage parameter, so that the lower limit voltage setting sub-module 220 outputs the corresponding lower limit voltage (matches with the lower limit voltage setting information).

In addition, before the upper limit voltage delivery module 210 and the lower limit voltage delivery module 220 set the corresponding upper limit/lower limit voltages, step S606 needs to be performed, and the upper limit voltage range regulator 3KM3 in the upper limit voltage delivery module 210 receives an upper limit voltage range instruction including a first upper limit breaker instruction for the first upper limit breaker 3KM31, a second upper limit breaker instruction for the second upper limit breaker 3KM32, and a third upper limit breaker instruction for the third upper limit breaker 3KM33, and identifies validity of each instruction to drive the upper limit voltage range regulator 3KM3 to operate in the upper limit voltage range series or parallel mode. Meanwhile, step S607 needs to be executed, in which the lower limit voltage range regulator 4KM3 in the lower limit voltage transmission module 220 receives the lower limit voltage range command including the first lower limit breaker command for the first lower limit breaker 4KM31, the second lower limit breaker command for the second lower limit breaker 4KM32 and the third lower limit breaker command for the third lower limit breaker 4KM33, and identifies validity of each command to drive the lower limit voltage range regulator 4KM3 to operate in the lower limit voltage range series or parallel mode.

Next, in step S530, when the test is performed, the control device 100 generates an upper limit abrupt change mode command for the upper limit voltage transmission module 210 and a lower limit abrupt change mode command for the lower limit voltage transmission module 220, and transmits the upper limit abrupt change mode command and the lower limit abrupt change mode command to the test device 200, so as to control the test device 200 to execute an abrupt change mode required for the dc network voltage abrupt change test. Wherein the (current) mutation pattern comprises: upper voltage abrupt lower limit voltage (mode), lower voltage abrupt upper limit voltage (mode) and test end (mode).

Specifically, when the test is performed, first, step S612 is executed, and the control device 100 acquires test execution requirement information including mutation mode information, a test switching command, and a test ending command for the current mutation test. Then, the control device 100 determines the abrupt change mode required for the current test based on the acquired test implementation demand information, generates an upper limit abrupt change mode command for the upper limit voltage delivery module 210 and a lower limit abrupt change mode command for the lower limit voltage delivery module 220, further transmits the upper limit abrupt change mode command to the upper limit voltage control submodule 212 in the upper limit voltage delivery module 210 (step S613), and transmits the lower limit abrupt change mode command to the lower limit voltage control submodule 222 in the lower limit voltage delivery module 220 (step S614).

In one embodiment, when the control device 100 determines that the abrupt change mode required by the current test is the upper limit voltage abrupt change lower limit voltage (mode), the control device 100 generates an effective upper limit abrupt change mode command for the upper limit voltage transmission module 210 and an effective lower limit abrupt change mode command for the lower limit voltage transmission module 220, and sends the effective upper limit abrupt change mode command and the effective lower limit abrupt change mode command to the upper limit voltage control sub-module 212 and the lower limit voltage control sub-module 222 respectively. Further, after the preset switching time threshold, the control device 100 generates an invalid upper limit abrupt change mode command for the upper limit voltage delivery module 210 and a valid lower limit abrupt change mode command for the lower limit voltage delivery module 220, and transmits the invalid upper limit abrupt change mode command and the valid lower limit abrupt change mode command to the upper limit voltage control submodule 212 and the lower limit voltage control submodule 222, respectively.

In one embodiment, when the control device 100 determines that the abrupt change mode required for the current test is the lower limit voltage abrupt change upper limit voltage (mode), the control device 100 generates an invalid upper limit abrupt change mode command for the upper limit voltage delivery module 210 and a valid lower limit abrupt change mode command for the lower limit voltage delivery module 220, and transmits the invalid upper limit abrupt change mode command and the valid lower limit abrupt change mode command to the upper limit voltage control sub-module 212 and the lower limit voltage control sub-module 222, respectively. Further, after the preset switching time threshold, the control device 100 generates an effective upper limit abrupt change mode command for the upper limit voltage delivery module 210 and an effective lower limit abrupt change mode command for the lower limit voltage delivery module 220, and transmits the upper limit abrupt change mode command and the lower limit abrupt change mode command to the upper limit voltage control submodule 212 and the lower limit voltage control submodule 222, respectively.

In one embodiment, when the control device 100 determines that the abrupt change pattern required for the current test is the test end (pattern), the control device 100 generates an invalid upper limit abrupt change pattern command for the upper limit voltage supply module 210 and an invalid lower limit abrupt change pattern command for the lower limit voltage supply module 220, and transmits the upper limit voltage control sub-module 212 and the lower limit voltage control sub-module 222, respectively. Further, after a preset end time threshold, the control device 100 transmits an upper limit input power command for invalidation of the upper limit regulator breaker 3QF11 in the upper limit voltage setting submodule 211, an upper limit transformation control command for invalidation of the upper limit transformer breaker 3QF21 in the upper limit voltage setting submodule 211, an upper limit voltage range command for invalidation of the upper limit voltage range regulator 3KM3 in the upper limit voltage setting submodule 211 (wherein the invalid upper limit voltage range commands include a first upper limit breaker command for invalidation of the first upper limit breaker 3KM31, a second upper limit breaker command for invalidation of the second upper limit breaker 3KM32, and a third upper limit breaker command for invalidation of the third upper limit breaker 3KM 33), and a lower limit input power command for invalidation of the lower limit regulator breaker 4QF11 in the lower limit voltage setting submodule 221 to the test device 200, Invalid lower limit transforming control instructions for the lower limit transforming circuit breaker 4QF21 in the lower limit voltage setting sub-module 221 and invalid lower limit voltage range instructions for the lower limit voltage range regulator 4KM3 in the lower limit voltage setting sub-module 221 (wherein the invalid lower limit voltage range instructions include invalid first lower limit circuit breaker instructions for the first lower limit circuit breaker 4KM31, invalid second lower limit circuit breaker instructions for the second lower limit circuit breaker 4KM32 and invalid third lower limit circuit breaker instructions for the third lower limit circuit breaker 4KM 33) to end the dc network voltage sudden change test of the current test piece.

Finally, in step S540, when the test is performed, the upper limit voltage control submodule 212 in the test apparatus 200 receives the upper limit abrupt change mode instruction, controls the on/off of the upper limit voltage control submodule 212 in the test apparatus 200 by using the upper limit abrupt change mode instruction (step S615), and further transmits the upper limit voltage to the test article after the (anode of the) upper limit voltage output submodule 213 obtains the upper limit voltage of the high potential; at the same time, the lower limit voltage control submodule 222 in the test apparatus 200 receives the lower limit abrupt change mode command, controls the on/off of the lower limit voltage control submodule 222 in the test apparatus 200 using the lower limit abrupt change mode command (step S616), and further transmits the lower limit voltage of the high potential to the test article after the (anode of the) lower limit voltage output submodule 223 acquires the lower limit voltage of the high potential. In this way, the test apparatus 200 receives the upper limit sudden change mode command for the upper limit voltage control submodule 212 and the lower limit sudden change mode command for the lower limit voltage control submodule 222, and detects the validity thereof, so as to control the on-off states of the upper limit voltage control submodule 212 and the lower limit voltage control submodule 222, so that the tested object obtains the corresponding upper limit voltage or lower limit voltage, or ends the test.

The invention provides a direct current network voltage mutation test device and a method for realizing the direct current network voltage mutation test. The test device utilizes two upper limit/lower limit voltage transmission modules to respectively adopt a voltage transformation and rectification processing method, directly adjusts a three-phase industrial power supply to be the upper limit/lower limit voltage required by the sudden change network voltage test, and realizes the jump function of the sudden change voltage in the direct current network voltage sudden change test by controlling the on-off state of a corresponding upper limit/lower limit voltage control submodule in the upper limit/lower limit voltage transmission module. The sudden change voltage output by the testing device is slightly influenced by current, the network voltage sudden change characteristic is hardened, and the network voltage sudden change test under the no-load working condition of a tested product can be realized. In addition, the test device provided by the invention is characterized in that a corresponding upper limit/lower limit voltage range regulator is added in the upper limit/lower limit voltage transmission module, so that the upper limit/lower limit voltage transmission module can output a voltage in a larger range, the voltage mutation range can be subjected to stepless regulation, the upper limit/lower limit voltage transmission module can output any range change of 0-2000V voltage, and the function that a tested product in the national standard of a network voltage mutation test needs to jump in DC1500V (plus or minus 300V) is met. Furthermore, the test device designed by the invention has high automation degree, only needs to be automatically set in the control device, and has short test time and high test efficiency.

The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Although the embodiments of the present invention have been described above, the above descriptions are only for the convenience of understanding the present invention, and are not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a direct current network voltage sudden change test device, includes the upper limit/lower limit voltage who is used for providing the required upper limit/lower limit voltage of network voltage sudden change experiment respectively and carries the module, wherein, the input of upper limit/lower limit voltage transport module inserts three-phase industrial power supply, and the output inserts the article to be tested to possess:

the upper limit/lower limit voltage setting submodule is used for receiving an upper limit/lower limit voltage setting instruction and an upper limit/lower limit voltage parameter, and regulating the output voltage value of the corresponding submodule into the upper limit/lower limit voltage according to the upper limit/lower limit voltage parameter and by using the upper limit/lower limit voltage setting instruction;

the upper limit/lower limit voltage control submodule is connected with the upper limit/lower limit voltage setting submodule and is used for controlling the on-off of the upper limit/lower limit voltage control submodule by utilizing a received upper limit/lower limit mutation mode instruction so as to convey the upper limit/lower limit voltage obtained from the upper limit/lower limit voltage setting submodule during test implementation;

and the upper limit/lower limit voltage output submodule is connected with the upper limit/lower limit voltage control submodule and is used for transmitting the upper limit/lower limit voltage to the tested object after the upper limit/lower limit voltage is obtained.

2. The test device of claim 1, wherein the upper/lower voltage setting submodule comprises:

the upper limit/lower limit voltage regulating unit is used for receiving an upper limit/lower limit input power supply instruction, acquiring a three-phase alternating current power supply signal under the condition that the current instruction is effective, regulating the three-phase alternating current power supply signal and outputting an upper limit/lower limit alternating current voltage regulating signal matched with the acquired upper limit/lower limit voltage parameter, wherein the upper limit/lower limit voltage setting instruction comprises the upper limit/lower limit input power supply instruction;

the upper limit/lower limit voltage transformation unit is connected with the upper limit/lower limit voltage regulation unit and is used for receiving an upper limit/lower limit voltage transformation control instruction, and under the condition that the current instruction is effective, the upper limit/lower limit alternating voltage regulation signal is subjected to voltage transformation processing through an electromagnetic induction principle to generate a corresponding upper limit/lower limit alternating voltage transformation signal, wherein the upper limit/lower limit voltage setting instruction further comprises the upper limit/lower limit voltage transformation control instruction;

and the upper limit/lower limit rectifying unit is connected with the upper limit/lower limit voltage transformation unit and is used for rectifying the upper limit/lower limit alternating current voltage transformation signal to obtain the upper limit/lower limit voltage required by the network voltage mutation test.

3. Testing device according to claim 2,

and the upper limit/lower limit voltage setting submodule is further used for receiving an upper limit/lower limit voltage range instruction of a corresponding module, and setting the output voltage range of the submodule into a range matched with the upper limit/lower limit voltage according to the upper limit/lower limit voltage range instruction.

4. The testing device of claim 3, wherein the upper/lower limit transforming unit comprises:

an upper limit/lower limit transformer for transforming the upper limit/lower limit ac voltage adjustment signal for the current module;

an upper/lower limit voltage range regulator connected to the output end of the upper/lower limit transformer, the upper/lower limit voltage range regulator including a first upper/lower limit breaker, a second upper/lower limit breaker and a third upper/lower limit breaker, wherein the first upper/lower limit breaker is configured to connect two sets of windings of the output end of the upper/lower limit transformer in series according to the received upper/lower limit voltage range command to provide the upper/lower limit voltage transmission module with an upper/lower limit voltage first range satisfying the upper/lower limit voltage, the second upper/lower limit breaker is combined with the third upper/lower limit breaker to provide the upper/lower limit voltage range command according to the received upper/lower limit voltage range command, connecting two groups of windings at the output end of the upper limit/lower limit transformer in parallel to provide a second upper limit/lower limit voltage range meeting the upper limit/lower limit voltage for the upper limit/lower limit voltage transmission module;

and the upper limit/lower limit transformation circuit breaker is used for receiving the upper limit/lower limit transformation control instruction and closing the upper limit/lower limit transformation control instruction after the instruction is detected to be effective so as to provide corresponding upper limit/lower limit alternating voltage regulating signals for the upper limit/lower limit transformer.

5. The test device according to any one of claims 2 to 4, wherein the upper/lower limit voltage adjusting unit includes:

the upper limit/lower limit voltage regulating circuit breaker is connected with the three-phase industrial power supply and is used for receiving the upper limit/lower limit input power supply instruction, and closing the upper limit/lower limit voltage regulating circuit breaker after the instruction is detected to be effective so as to provide corresponding three-phase alternating current power supply signals for the upper limit/lower limit voltage regulator;

and the upper limit/lower limit voltage regulator is connected with the upper limit/lower limit voltage regulating circuit breaker and is used for regulating the three-phase alternating current power supply signal according to the acquired upper limit/lower limit voltage parameter.

6. The testing device according to any one of claims 1 to 5, wherein the upper limit voltage output submodule is integrated with the first high voltage tolerant diode; and the lower limit voltage output submodule is integrated in the second high-voltage-resistant diode.

7. A system for realizing a direct current network voltage mutation test comprises:

a test device according to any one of claims 1 to 6;

and the control device is connected with the upper limit/lower limit voltage transmission modules in the test device and used for generating an upper limit/lower limit voltage setting instruction and an upper limit/lower limit voltage parameter corresponding to the upper limit/lower limit voltage transmission modules and sending the upper limit/lower limit voltage setting instruction and the upper limit/lower limit voltage parameter to the test device, and generating an upper limit/lower limit sudden change mode instruction corresponding to the modules and transmitting the upper limit/lower limit sudden change mode instruction to the test device when a test is implemented so as to control the test device to execute a sudden change mode required by a direct current network voltage sudden change test.

8. The implementation system of claim 7, wherein the abrupt change pattern comprises: an upper limit voltage sudden change lower limit voltage and a lower limit voltage sudden change upper limit voltage, wherein, when the test of the upper limit voltage sudden change lower limit voltage is carried out,

and the control device is used for generating effective upper limit/lower limit sudden change mode instructions and respectively sending the effective upper limit/lower limit sudden change mode instructions to the upper limit/lower limit voltage conveying module, and further generating ineffective upper limit sudden change mode instructions and effective lower limit sudden change mode instructions after a preset switching time threshold value and respectively sending the ineffective upper limit sudden change mode instructions and the effective lower limit sudden change mode instructions to the upper limit/lower limit voltage conveying module.

9. The implementation system of claim 7 or 8, wherein the mutation pattern comprises: an upper limit voltage sudden change lower limit voltage and a lower limit voltage sudden change upper limit voltage, wherein, when the test of the lower limit voltage sudden change upper limit voltage is carried out,

the control device is used for generating an invalid upper limit sudden change mode instruction and an effective lower limit sudden change mode instruction and respectively sending the invalid upper limit sudden change mode instruction and the effective lower limit sudden change mode instruction to the upper limit/lower limit voltage conveying module, and further generating the effective upper limit/lower limit sudden change mode instruction after a preset switching time threshold value and respectively sending the effective upper limit/lower limit sudden change mode instruction to the upper limit/lower limit voltage conveying module.

10. An implementation method of a dc network voltage jump test, the implementation method using the implementation system of any one of claims 7 to 9 to perform the dc network voltage jump test on a test object, wherein the implementation method includes:

the method comprises the following steps that firstly, a control device generates an upper limit/lower limit voltage setting instruction and an upper limit/lower limit voltage parameter corresponding to an upper limit/lower limit voltage conveying module in a test device and sends the upper limit/lower limit voltage setting instruction and the upper limit/lower limit voltage parameter to the test device;

secondly, an upper limit/lower limit voltage setting submodule in the test device receives the upper limit/lower limit voltage setting instruction and the upper limit/lower limit voltage parameter, and adjusts the output voltage value of the corresponding submodule into upper limit/lower limit voltage according to the upper limit/lower limit voltage parameter and by using the upper limit/lower limit voltage setting instruction;

step three, when the test is implemented, the control device generates an upper limit/lower limit mutation mode instruction of a corresponding module and transmits the upper limit/lower limit mutation mode instruction to the test device so as to control the test device to execute a mutation mode required by the direct current network voltage mutation test;

and fourthly, when the test is implemented, the upper limit/lower limit voltage control submodule in the test device controls the on-off of the upper limit/lower limit voltage control submodule by using the received upper limit/lower limit mutation mode instruction of the corresponding module so as to convey the upper limit/lower limit voltage obtained from the upper limit/lower limit voltage setting submodule, and further transmits the upper limit/lower limit voltage to the tested object after the upper limit/lower limit voltage output submodule in the test device obtains the upper limit/lower limit voltage.

11. The method according to claim 10, wherein in step three, the mutation pattern comprises: an upper limit voltage sudden change lower limit voltage and a lower limit voltage sudden change upper limit voltage, wherein, when the test of the upper limit voltage sudden change lower limit voltage is carried out,

the control device generates an effective upper limit/lower limit mutation mode instruction and respectively sends the effective upper limit/lower limit mutation mode instruction to the upper limit/lower limit voltage transmission module;

further, after a preset switching time threshold, the control device generates an invalid upper limit abrupt change mode command and an invalid lower limit abrupt change mode command, and respectively sends the commands to the upper limit/lower limit voltage transmission module.

12. The method according to claim 10 or 11, wherein in step three, the mutation pattern comprises: an upper limit voltage sudden change lower limit voltage and a lower limit voltage sudden change upper limit voltage, wherein, when the test of the lower limit voltage sudden change upper limit voltage is carried out,

the control device generates an invalid upper limit mutation mode instruction and an effective lower limit mutation mode instruction, and respectively sends the invalid upper limit mutation mode instruction and the effective lower limit mutation mode instruction to the upper limit/lower limit voltage transmission module;

further, after a preset switching time threshold, the control device generates an effective upper limit/lower limit abrupt change mode command and sends the effective upper limit/lower limit abrupt change mode command to the upper limit/lower limit voltage transmission module respectively.