Device for measuring protection action time of non-electric quantity protection device of generator-transformer group

Abstract

The utility model relates to the technical field of electric power, in particular to a generator-transformer group non-electric quantity protection device protection action time measuring device which comprises a protection device, a control switch and an electric second meter. The control switch comprises two normally open contact pairs, one normally open contact pair is connected with a protection starting interface of the protection device, and the other normally open contact pair is connected with a starting contact of the electric second meter; and a protection outlet of the protection device is connected with a stop contact of the electric second meter. According to the utility model, the accurate measurement of the actuation time of the generator-transformer group non-electric quantity protection device is effectively realized, and important data support is provided for evaluating and optimizing the performance of a protection system.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power, in particular to a protection action time measuring device for a non-electrical quantity protection device of a generator-transformer group. Background Art

[0002] In the power system, the generator-transformer group (generator-transformer group) is the core equipment, and its safe and stable operation is directly related to the reliability of the entire power grid. As an important part of the generator-transformer group protection system, the non-electrical quantity protection device is used to monitor and respond to abnormal changes in non-electrical quantities (such as temperature, pressure, oil level, vibration, etc.), and is a key line of defense to prevent equipment damage and avoid the expansion of accidents. Understanding the action time characteristics of non-electrical quantity protection is helpful to reasonably configure protection devices, optimize the protection scheme of the power system, and improve the overall reliability and economy of the power system. After a power accident occurs, accurate action time measurement data can help analyze the cause of the accident, determine whether the protection device is operating normally, clarify the responsibility, and provide a basis for subsequent improvement measures. Therefore, the action time measurement of non-electrical quantity protection devices is of great significance for evaluating their performance and ensuring fast and effective fault isolation.

[0003] At present, the acquisition of the non-electrical protection action time of the generator-transformer group mainly relies on the action message generated inside the protection device. However, this method has obvious shortcomings: first, the action time recorded in the message may not be accurate enough due to factors such as internal processing delays and time synchronization errors in the device; second, if the protection device itself has a fault or is improperly configured, the action time recorded may not truly reflect the actual action situation, thereby misleading the subsequent fault analysis and processing. In addition, the lack of dedicated, high-precision measurement devices to directly and accurately measure the action time of non-electrical protection means that power companies lack reliable data support when evaluating the performance of protection devices and formulating protection strategies. This not only affects the optimal configuration of protection devices and the overall reliability of the power system, but also increases the risk of power accidents to a certain extent. Utility Model Content

[0004] The purpose of the utility model is to provide a protection action time measuring device for a non-electrical quantity protection device of a generator-transformer group in order to solve at least one of the above technical problems.

[0005] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0006] A device for measuring the protection action time of a non-electrical quantity protection device of a generator-transformer group, comprising a protection device, a control switch and an electric stopwatch;

[0007] The control switch comprises two pairs of normally open contacts, one pair of which is connected to the protection start interface of the protection device, and the other pair of which is connected to the start contact of the electric stopwatch;

[0008] The protection outlet of the protection device is connected to the stop contact of the electric stopwatch.

[0009] Furthermore, the control switch adopts a 2P DC circuit breaker.

[0010] Furthermore, the electric stopwatch adopts a 415 type digital electric stopwatch.

[0011] Furthermore, a pair of normally open contacts of the control switch is connected to contacts I and II of the electric stopwatch, and the electric stopwatch is started when the control switch is closed;

[0012] The protection outlet of the protection device is connected to the I and III contacts of the electric stopwatch, and when the protection device is actuated, the electric stopwatch is triggered to stop timing.

[0013] Furthermore, the time displayed by the electric stopwatch is the protection action time.

[0014] The beneficial effects of the utility model are:

[0015] The utility model measures the non-electrical protection action time of each generator-transformer group multiple times and takes the average value, which can accurately check the protection action time of the protection device and the accuracy of the protection action message of the protection device, and can timely discover abnormal conditions such as possible action delay or early action of the protection device, so as to ensure that the fault can be quickly and reliably cut off when a fault occurs, avoid the expansion of the fault to affect the normal operation of the entire power system, reduce the scope and time of power outage, and reduce the impact on users. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention is a schematic structural diagram of a protection action time measuring device for a non-electrical quantity protection device of a generator-transformer group according to an embodiment of the present invention.

[0017] In the figure: 1. protective device, 2. control switch, 3. electric stopwatch. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] Embodiment 1

[0020] Figure 1 This is a schematic diagram of the structure of a device for measuring the protection action time of a non-electrical protection device of a generator-transformer group according to one embodiment of the utility model. Figure 1 As shown, according to an embodiment of the utility model, a device for measuring the protection action time of a non-electrical protection device of a generator-transformer group includes a protection device 1, a control switch 2 and an electric stopwatch 3;

[0021] The control switch 2 includes two pairs of normally open contacts, one of which is connected to the protection start interface of the protection device 1, and the other is connected to the start contact of the electric stopwatch 3;

[0022] The protection outlet of the protection device 1 is connected to the stop contact of the electric stopwatch 3 .

[0023] In this embodiment, the protection action time measuring device of the non-electrical quantity protection device of the generator-transformer group includes a protection device 1, a control switch 2 and an electric stopwatch 3. The control switch 2 is provided with two pairs of normally open contacts, which are respectively connected to the start interface of the protection device 1 and the start contact of the electric stopwatch 3 to trigger both synchronously. The outlet of the protection device 1 is directly connected to the stop contact of the electric stopwatch 3 to ensure accurate recording of the time during the protection action. The utility model accurately measures the time from the protection device receiving the non-electrical quantity signal to the completion of the protection action, ensuring the rapid response and accuracy of the protection system.

[0024] The utility model effectively realizes the accurate measurement of the action time of the non-electrical quantity protection device of the generator-transformer group, and provides important data support for evaluating and optimizing the performance of the protection system.

[0025] Embodiment 2

[0026] According to an implementation mode of the present utility model, on the basis of the first embodiment, the control switch 2 adopts a 2P DC circuit breaker.

[0027] Preferably, the electric stopwatch 3 adopts a 415 type digital electric stopwatch;

[0028] A pair of normally open contacts of the control switch 2 is connected to contacts I and II of the electric stopwatch 3, and the electric stopwatch 3 is started when the control switch 2 is closed;

[0029] The protection outlet of the protection device 1 is connected to the I and III contacts of the electric stopwatch 3. When the protection device 1 is actuated, the electric stopwatch 3 is triggered to stop timing.

[0030] The time displayed by the electric stopwatch 3 is the protection action time.

[0031] In this embodiment, the circuit breaker uses a 2P DC circuit breaker, one pair of normally open contacts is connected to the I-II contacts of the electric stopwatch 3, and the electric stopwatch 3 is started when closed. The other pair of normally open contacts of the circuit breaker is connected to the protection device 1, and closing triggers the protection action. The 2P circuit breaker triggers the timing of the electric stopwatch 3 and the protection action of the protection device from opening to closing. The protection outlet of the protection device 1 is connected to the electric stopwatch I-III. Once the protection device 1 is actuated, the electric stopwatch 3 stops timing. The time displayed by the electric stopwatch 3 is the protection action time.

[0032] The working power supply of 415 digital electric stopwatch is AC220V, 50 / 60Hz, and the power consumption is 5VA. The specific measurement method of 415 digital electric stopwatch is shown in Table 1:

[0033] Table 1

[0034] The utility model can accurately measure the protection action time by measuring the action time of each non-electrical quantity protection of the generator-transformer group for multiple times and taking the average value, and can timely discover abnormal situations such as possible action delay or advance of the protection device, so as to ensure that the fault can be quickly and reliably removed when a fault occurs, avoid the expansion of the fault and affect the normal operation of the entire power system, reduce the scope and time of power outages, and reduce the impact on users. The utility model helps to improve the reliability and accuracy of the protection device. By measuring the action time, the performance of the protection device can be evaluated and verified, potential problems can be discovered and timely maintained and improved, ensuring that the protection device can operate correctly at critical moments and effectively protect the generator-transformer group equipment from damage. Understanding the action time characteristics of non-electrical quantity protection helps to reasonably configure the protection device, optimize the protection plan of the power system, and improve the overall reliability and economy of the power system. After a power accident occurs, accurate action time measurement data can help analyze the cause of the accident and determine whether the protection device is operating normally.

[0035] Embodiment 3

[0036] Working process of this utility model:

[0037] The utility model uses a circuit breaker, an electric stopwatch 3, a test line and other equipment to make a device that can measure the protection action time of a non-electrical quantity protection device of a generator and transformer group; the protection start interface of the protection device 1 is connected to a pair of normally open contacts of the circuit breaker, the other pair of normally open contacts of the circuit breaker is connected to contacts I and II of the electric stopwatch 3, and contacts I and III of the electric stopwatch 3 are connected to the protection outlet of the protection device 1.

[0038] When an abnormal situation occurs in the generator-transformer system that requires a response from the protection device 1, the protection device 1 receives a non-electrical quantity signal and triggers its internal logic judgment. At this time, a pair of contacts of the control switch 2 is closed, and the protection device 1 and the electric stopwatch 3 are started at the same time. The protection device 1 executes the protection logic. Once the action condition is met, another pair of contacts are closed through its outlet to send a stop signal to the electric stopwatch 3. The time from the start of the electric stopwatch 3 to the receipt of the stop signal is the action time of the protection device, which is accurately recorded and displayed. The action time of each non-electrical quantity protection of the generator-transformer group is measured multiple times and the average value is taken to accurately measure the protection action time.

[0039] The utility model measures the action time of all non-electrical protections of the non-electrical protection device of the generator-transformer group, checks the measured time with the set value, and promptly checks the inside and wiring of the protection device when problems are found, to ensure that the protection device can operate correctly at the critical moment and effectively protect the generator-transformer group equipment from damage.

[0040] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0041] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A device for measuring the protection action time of a non-electrical protection device of a generator-transformer group, comprising a protection device (1), characterized in that: Also includes: Control switch (2) and electric stopwatch (3); The control switch (2) comprises two pairs of normally open contacts, one pair of which is connected to the protection start interface of the protection device (1), and the other pair of which is connected to the start contact of the electric stopwatch (3); The protection outlet of the protection device (1) is connected to the stop contact of the electric stopwatch (3).

2. The device for measuring the protection action time of the non-electrical protection device of the generator-transformer group according to claim 1 is characterized in that: The control switch (2) is a 2P DC circuit breaker.

3. The device for measuring the protection action time of the non-electrical protection device of the generator-transformer group according to claim 2 is characterized in that: The electric stopwatch (3) is a 415-type digital electric stopwatch.

4. The device for measuring the protection action time of the non-electrical protection device of the generator-transformer group according to claim 3 is characterized in that: A pair of normally open contacts of the control switch (2) is connected to contacts I and II of the electric stopwatch (3), and the electric stopwatch (3) is started when the control switch (2) is closed; The protection outlet of the protection device (1) is connected to the contacts I and III of the electric stopwatch (3), and when the protection device (1) is activated, the electric stopwatch (3) is triggered to stop timing.

5. The device for measuring the protection action time of the non-electrical protection device of the generator-transformer group according to claim 1 is characterized in that: The time displayed by the electric stopwatch (3) is the protection action time.

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