KR102639218B1 - Integrated analysis system for operation characteristic of switch, data acquisition apparatus for switch and method for analyzing operation characteristic of switch - Google Patents

Abstract

The integrated analysis system for switchgear operating characteristics according to an embodiment of the present invention is electrically connected to some of the plurality of switchgear, respectively, and measures the load current, trip coil (T/C) current, and close coil of some of the plurality of switchgear. (C/C) A plurality of field collection units that measure current information including the magnitude and change rate of at least one of the currents and measure contact state information, and each of the contact state information and current information measured from the plurality of field collection units By receiving the corresponding contact signal and current signal and analyzing the time of change of the contact state included in the contact state information, mechanical operation characteristic information of each of the plurality of switchgear is generated and the current information is analyzed to determine the electrical characteristics of each of the plurality of switchgear. A signal processing unit that generates operating characteristic information; may include.

Description

Integrated analysis system for switchgear operation characteristics, field collection device for switchgear data, and integrated analysis method for switchgear operation characteristics {Integrated analysis system for operation characteristic of switch, data acquisition apparatus for switch and method for analyzing operation characteristic of switch}

The present invention relates to an integrated analysis system for switchgear operating characteristics, a switchgear data on-site collection device, and a method for integrated analysis of switchgear operating characteristics.

A switchgear electrically connected to a line can control the passage and blocking of electrical energy through closing and opening operations, and may include at least one of a circuit breaker and a disconnector.

Since the condition of these switchgear can become vulnerable due to long-term use of power equipment, it is important to quickly and accurately detect early defective symptoms of switchgear and quickly isolate defective switchgear from the power system to ensure stable supply of power and management of power facilities. This is important in terms of cost reduction.

Recently, the power system has become more complex due to the rapid increase in power demand and the expansion of distributed power sources, and the number of switchgear, which is equipment that controls the power system, is increasing.

Public Patent Publication No. 10-2014-0139268

An embodiment of the present invention is an integrated analysis system for operation characteristics of switchgear that can quickly and accurately detect early defect symptoms of switchgear and flexibly cope with expanded construction of switchgear, a switchgear data on-site collection device, and switchgear. Provides an integrated analysis method for operating characteristics.

The integrated analysis system for operation characteristics of switchgear according to an embodiment of the invention is electrically connected to some of the plurality of switchgear, respectively, and measures the load current, trip coil (T/C) current, and close coil of some of the plurality of switchgear. (C/C) a plurality of field collection units that measure current information including the magnitude and change rate of at least one of the currents and measure contact state information; And receiving contact signals and current signals corresponding to the contact state information and current information measured from the plurality of field collection units, respectively, and analyzing the time of change in the contact state included in the contact state information to determine the plurality of switchgear devices. a signal processing unit that generates mechanical operating characteristic information for each and analyzes the current information to generate electrical operating characteristic information for each of the plurality of switchgear; may include.

The switchgear data on-site collection device according to an embodiment of the present invention is electrically connected to at least one of a plurality of switchgear electrically connected to the line and collects the load current and trip coil (T/ C) an input unit that measures the magnitude and change rate of at least one of current and closed coil (C/C) current and measures the contact state; a communication unit generating a contact signal corresponding to contact state information of at least one of the plurality of switch devices and generating a current signal corresponding to current information of at least one of the plurality of switch devices; and a cable terminal that transmits the current signal and contact signal generated by the communication unit through a cable and receives power from the cable. may include.

The method of integrated analysis of switchgear operating characteristics according to an embodiment of the present invention includes load current, trip coil (T/C) current, and close coil (C/C) current of at least one of a plurality of switchgear electrically connected to the line. receiving a current signal corresponding to the magnitude and change rate of at least one of the following and receiving a contact signal corresponding to the contact state; Analyzing the time of change of the contact state to generate mechanical operation characteristic information of at least one of the plurality of switch devices; Analyzing the current to generate electrical operating characteristic information of at least one of the plurality of switchgear; and applying a value corresponding to the mechanical operation characteristic information and a value corresponding to the electrical operation characteristic information to an alarm condition expression and generating alarm information corresponding to the alarm value of the alarm condition expression. may include.

The integrated analysis system for operation characteristics of switchgear according to an embodiment of the present invention can quickly and accurately detect early defect symptoms of switchgear and can flexibly cope with expanded construction of switchgear.

In addition, the integrated analysis system for switchgear operation characteristics according to an embodiment of the present invention can be utilized when the switchgear is in a live state, a diagonal state, or an inspection state, and eliminates confusion that occurs during user maintenance or expansion. Human errors can be prevented.

Figure 1 is a diagram showing an integrated analysis system for operating characteristics of a switchgear according to an embodiment of the present invention.
Figure 2 is a block diagram showing an integrated analysis system for operating characteristics of a switchgear according to an embodiment of the present invention.
Figure 3 is a graph illustrating current signals and contact signals.
Figure 4 is a flow chart specifically illustrating a method for integrated analysis of operating characteristics of a switchgear according to an embodiment of the present invention.

The detailed description of the invention described below refers to the accompanying drawings, which show by way of example specific embodiments in which the invention may be practiced. It should be understood that the various embodiments of the invention are different from one another but are not necessarily mutually exclusive. For example, specific shapes, structures and characteristics described herein with respect to one embodiment may be implemented in other embodiments without departing from the spirit and scope of the invention. Additionally, it should be understood that the location or arrangement of individual components within each disclosed embodiment may be changed without departing from the spirit and scope of the invention. Accordingly, the detailed description that follows is not intended to be taken in a limiting sense, and the scope of the invention is limited only by the appended claims, together with all equivalents to what those claims assert, if properly described. Similar reference numbers in the drawings refer to identical or similar functions across various aspects.

Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings in order to enable those skilled in the art to easily practice the present invention.

Figure 1 is a diagram showing an integrated analysis system for operating characteristics of a switchgear according to an embodiment of the present invention.

Referring to Figure 1, the integrated analysis system for switchgear operating characteristics according to an embodiment of the present invention includes a plurality of field collection units (110a, 110b, 110c, 110d) and a signal processing unit 120, and a plurality of cables (130a, 130b, 130c, 130d) may be further included, and the operating characteristics of a plurality of switchgear (10a, 10b, 10c, 10d) electrically connected to the line 20 can be comprehensively analyzed.

A plurality of field collection units (110a, 110b, 110c, 110d) are electrically connected to some of the plurality of switchgear (10a, 10b, 10c, 10d), respectively, to Changes in the contact state and current of some of the contact points can be measured. Here, the current refers to the magnitude and change rate of at least one of load current, trip coil (T/C) current, and closed coil (C/C) current.

For example, the plurality of field collection units (110a, 110b, 110c, 110d) can be simply connected in a live wire state by directly connecting a line to measure the contact state and by using an open type current transformer core method to measure current. It can be electrically connected to a plurality of switchgear (10a, 10b, 10c, 10d) by method.

For example, each of the plurality of field collection units (110a, 110b, 110c, 110d) may sample the current of some of the plurality of switchgear (10a, 10b, 10c, 10d) at a predetermined period, and the sampled It is possible to generate a contact signal and a current signal corresponding to the current value, and the plurality of generated contact signals and current signals can be transmitted to the signal processing unit 120 through a plurality of cables (130a, 130b, 130c, and 130d). .

The signal processing unit 120 may receive contact signals and current signals respectively corresponding to changes in contact state and current measured from the plurality of field collection units 110a, 110b, 110c, and 110d.

Thereafter, the signal processing unit 120 analyzes the time of change in the contact state to generate mechanical operation characteristic information of each of the plurality of switch devices, and analyzes the waveform of the current to determine the electrical operation of each of the plurality of switch devices. Characteristic information can be generated.

Here, the mechanical operation characteristics may include operation characteristics according to pneumatic, hydraulic, or electromagnetic force of the switch device, and the electrical operation characteristics may include operation characteristics depending on the excitation of the coil of the switch device.

For example, the signal processing unit 120 compares the time of change in the measured contact state with the reference time and selects the mechanical operation characteristic information as either normal mechanical operation or defective mechanical operation according to the comparison result. The magnitude of the current and the reference magnitude are compared, and according to the comparison result, the electrical operation characteristic information can be selected as either normal electrical operation or poor electrical operation. Thereafter, the signal processing unit 120 may determine that the switchgear that selects at least one of the mechanical operation defect and the electrical operation defect is a defective switchgear.

Since the signal processing unit 120 can generate a plurality of operating characteristic information based on different principles in an integrated manner, it can support accurate diagnosis of early failure of the plurality of switchgear 10a, 10b, 10c, and 10d. .

Additionally, the signal processing unit 120 can sequentially analyze the operating states of the plurality of opening and closing devices 10a, 10b, 10c, and 10d. If a plurality of switchgear (10a, 10b, 10c, 10d) operates simultaneously, the signal processing unit 120 may store some information in a temporary storage configuration such as a buffer, and sequentially read the information stored in the buffer. You can. In this way, the signal processing unit 120 can perform a comprehensive analysis of the plurality of switchgear (10a, 10b, 10c, 10d) in real time, thereby preventing early failure of the plurality of switchgear (10a, 10b, 10c, 10d). It can support rapid diagnosis and can flexibly respond to the expansion of switchgear and field collection units.

The plurality of cables 130a, 130b, 130c, and 130d may electrically connect one of the plurality of field collection units 110a, 110b, 110c, and 110d to the signal processing unit 120, respectively. For example, the plurality of cables (130a, 130b, 130c, 130d) are A-phase current, B-phase current, C-phase current, T/C current, C/C current, state of contact a and state of contact b, respectively. The information corresponding to can be integrated into one and include a single conductor passing through.

In addition, each of the plurality of cables 130a, 130b, 130c, and 130d can transmit a current signal and a contact signal from one of the plurality of field collection units 110a, 110b, 110c, and 110d to the signal processing unit 120, Power may be transmitted from the signal processing unit 120 to one of the plurality of field collection units 110a, 110b, 110c, and 110d.

For example, each of the plurality of cables 130a, 130b, 130c, and 130d may be configured to allow various signals and power to pass through according to a transmission method that carries power and communication signals together. As an example, PoE (Power There is a transmission method (over Ethernet). That is, the number of each of the plurality of cables 130a, 130b, 130c, and 130d may be one.

Accordingly, the plurality of cables 130a, 130b, 130c, and 130d may have a simple structure despite the connection of the plurality of field collection units 110a, 110b, 110c, and 110d to the signal processing unit 120. , human errors such as confusion that occur during user maintenance or expansion can be prevented.

Figure 2 is a block diagram showing an integrated analysis system for operating characteristics of a switchgear according to an embodiment of the present invention.

Referring to FIG. 2, the field collection unit 110 may include an input unit 111, a communication unit 112, a buffer 113, a transmission port 114, and a power unit 115.

The input unit 111 is electrically connected to a plurality of switchgear 10 electrically connected to a line and can measure changes in the contact state and current of the plurality of switchgear 10. For example, the input unit 111 can receive or detect the status information of contact A and the status information of contact B, and may include A-phase current, B-phase current, C-phase current, trip coil (T/C) current, and Closed coil (C/C) current can be input or detected.

Here, the A-phase current, B-phase current, and C-phase current correspond to the load current in this specification, and the trip coil (T/C) current refers to the current when the coil is excited to open the switch and close. Coil (C/C) current refers to the current when the coil is excited to turn on the switch.

Additionally, the input unit 111 can receive information on whether a plurality of switchgear 10 is live. Thereafter, the input unit 111 may stop measuring at least one of a change in contact state and current depending on whether the wire is live. Accordingly, the input unit 111 can safely perform measurement operations on a plurality of switchgear 10.

For example, the input unit 111 measures the current of each of the plurality of switch devices 10 when the plurality of switch devices 10 are in a live state, and when the plurality of switch devices 10 are not in a live state, the input unit 111 measures the current of each of the plurality of switch devices 10. Changes in the contact state and current of each switch 10 can be measured.

The communication unit 112 may generate a contact signal corresponding to a change in the contact state of the plurality of switchgear 10 and generate a current signal corresponding to the current of the plurality of switchgear 10. For example, the communication unit 112 may generate a carrier wave and modulate the carrier wave according to changes in the contact state and the current to generate the contact signal and the current signal.

The buffer 113 can temporarily store information on changes in contact status and current information. For example, when the input unit 111 simultaneously measures contact state change information and current information, the buffer 113 is used while the communication unit 112 generates and transmits the contact state change information to the signal processing unit 120. The current information can be temporarily stored.

The transmission port 114 can transmit the current signal and contact signal generated by the communication unit 112. For example, the transmission port 114 may be implemented as a cable terminal that can be connected to a cable, may be implemented as an antenna that supports long-distance communication, or may be implemented as a coil that supports short-distance communication. there is.

Additionally, the transmission port 114 can receive power from the signal processing unit 120. Accordingly, the power of the field collection unit 110 can be managed integratedly.

The power supply unit 115 may store or convert power supplied from the signal processing unit 120. For example, the power unit 115 may include at least one of a battery, a converter, and a switch.

Meanwhile, the switchgear operating characteristic integrated analysis system according to an embodiment of the present invention includes a value corresponding to the mechanical operating characteristic information generated by the signal processing unit 120 and a value corresponding to the electrical operating characteristic information in an alarm condition equation. It may further include an alarm output unit 145 that applies and generates alarm information corresponding to the alarm value of the alarm condition expression and outputs an alarm corresponding to the alarm information.

For example, the alarm condition expression can be set as Equation 1 below. Here, t2 is the change point of the b contact point, t1 is the change point of the a contact point, I represents the average current of the A-phase current, B-phase current, and C-phase current, and x and y are constants. Additionally, t1 and t2 may be values corresponding to the mechanical operating characteristic information, and I may be a value corresponding to the electrical operating characteristic information.

Meanwhile, the alert output unit 145 may include a display device that outputs a visual alert or a speaker that outputs an audible alert. For example, the alarm output unit 145 may determine which alarm information the calculated alarm value corresponds to among a plurality of alarm information corresponding to different alarm value ranges, and determine which alarm information the calculated alarm value belongs to. Depending on the alarm, the alarm can be output initially or audibly.

Accordingly, users can quickly disconnect switchgear that is judged to be defective from the power system, and can greatly contribute to stable supply of power and reduction of power facility management costs.

Figure 3 is a graph illustrating current signals and contact signals.

Referring to FIG. 3, the integrated analysis system for switchgear operating characteristics according to an embodiment of the present invention can calculate at least two of the maximum value, integrated value, change rate, and form of the current by analyzing the waveform of the measured current. , the point of change in voltage or current at the contact point can be analyzed together.

For example, the switchgear operating characteristic integrated analysis system compares each calculated maximum value, integrated value, change rate, and form with a predetermined maximum value, integrated value, change rate, and form, and determines the predetermined value of the calculated value. Electrical operating characteristic information corresponding to relative size can be generated.

Figure 4 is a flow chart specifically illustrating a method for integrated analysis of operating characteristics of a switchgear according to an embodiment of the present invention.

Referring to Figure 4, the field collection unit includes an initialization and standby step (S110), a switchgear operation check step (S120), a coil current measurement step (S131), a load current measurement step (S132), and a change measurement step in the contact state ( It may include a step S133), a temporary storage step of measured values (S145), a data transmission step (S150), and a transmission success confirmation step (S160).

Referring to FIG. 4, the signal processing unit includes an initialization step (S210), a normal reception confirmation step (S220), a retransmission request step (S225), a current analysis step (S231), an operation time analysis step (S232), and a characteristic defect confirmation step. It may include (S240), a user alert step (S245), and a diagnosis result output step (S250).

That is, the method for integrated analysis of switchgear operating characteristics according to an embodiment of the present invention includes a contact signal corresponding to a change in the contact state and current of at least one of a plurality of switchgear electrically connected to the line, which is the step corresponding to S220, and It may include the step of receiving a current signal, and may include the step of analyzing the time of change in the contact state, which is the step corresponding to S231, and generating mechanical operating characteristic information of at least one of the plurality of switchgear, , It may include the step of analyzing the waveform of the current, which is a step corresponding to S232, and generating electrical operation characteristic information of at least one of the plurality of switchgear, and the mechanical operation, which is a step corresponding to S240, S245, and S250. It may include applying characteristic information and the electrical operation characteristic information to an alarm condition expression and generating alarm information corresponding to an alarm value of the alarm condition expression.

Accordingly, early defects in the switchgear can be detected quickly and accurately, and expansion of the switchgear can be flexibly handled.

In the above, the present invention has been described by way of examples, but the present invention is not limited to the above-described embodiments, and those skilled in the art in the field to which the invention pertains can do so without departing from the gist of the invention as claimed in the patent claims. Anyone can make various variations.

10a, 10b, 10c, 10d: switchgear
20: track
110a, 110b, 110c, 110d: Field collection department
111: input unit
112: Department of Communications
113: buffer
114: Transmission port
120: signal processing unit
130a, 130b, 130c, 130d: cable
145: Alarm output unit

Claims (9)

Each is electrically connected to some of the plurality of switchgear and includes the size and change rate of at least one of the load current, trip coil (T/C) current, and close coil (C/C) current of some of the plurality of switchgear. A plurality of field collection units that measure current information and contact state information;
Each of the plurality of switchgear devices receives contact signals and current signals corresponding to the contact state information and current information measured from the plurality of field collection units, and analyzes the time of change in the contact state included in the contact state information. A signal processing unit that generates mechanical operating characteristic information and analyzes the current information to generate electrical operating characteristic information of each of the plurality of switchgear; and
The value corresponding to the mechanical operating characteristic information and the value corresponding to the electrical operating characteristic information are entered into an alarm condition equation, -t2 is the change point of contact point B, t1 is the change point of contact point A, I represents the average current of A-phase current, B-phase current, and C-phase current, and x and y are constants. In addition, t1 and t2 are values corresponding to the mechanical operation characteristic information, and I is a value corresponding to the electrical operation characteristic information, and generate alarm information corresponding to the alarm value of the alarm condition expression, and generate the alarm. Alarm output unit that outputs an alarm corresponding to the information
An integrated analysis system for switchgear operating characteristics including.
According to paragraph 1,
The plurality of field collection units receive information on whether the plurality of switch devices are live lines, measure current information of each of the plurality of switch devices when the plurality of switch devices are in a live line state, and measure the current information of each of the plurality of switch devices. An integrated analysis system for switchgear operating characteristics that measures contact status information and current information of each of the plurality of switchgear devices when the device is not in a live state.
The method of claim 1, wherein each of the plurality of field collection units,
a communication unit that generates a contact signal corresponding to contact state information of some of the plurality of switchgear devices and generates a current signal corresponding to current information of some of the plurality of switchgear devices; and
a transmission port that transmits the current signal and contact signal generated by the communication unit wired or wirelessly; Integrated analysis system for switchgear operating characteristics including.
According to paragraph 1,
Further comprising a plurality of cables each electrically connected between one of the plurality of field collection units and the signal processing unit and including a single conductor through which the current signal, contact signal, and power pass together,
The signal processing unit supplies the power to each of the plurality of field collection units through the plurality of cables. An integrated analysis system for operating characteristics of a switchgear.
The method of claim 4, wherein each of the plurality of field collection units,
Includes a buffer to temporarily store measured contact state information and current information,
An integrated analysis system for switchgear operating characteristics that sequentially generates signals one by one for a plurality of pieces of information stored in the buffer and transmits the generated signals to the plurality of cables.
According to paragraph 1,
The signal processing unit analyzes at least two of the maximum value, integrated value, rate of change, and form of the current included in the current signal, and generates electrical operation characteristic information corresponding to the relative size of the analyzed value to a predetermined value. Device operating characteristics integrated analysis system.
delete delete Receive a current signal corresponding to the size and change rate of at least one of the load current, trip coil (T/C) current, and close coil (C/C) current of at least one of the plurality of switchgear electrically connected to the line and contact state. Receiving a contact signal corresponding to;
Analyzing the time of change of the contact state to generate mechanical operation characteristic information of at least one of the plurality of switch devices;
Analyzing the current to generate electrical operating characteristic information of at least one of the plurality of switchgear; and
The value corresponding to the mechanical operating characteristic information and the value corresponding to the electrical operating characteristic information are entered into an alarm condition equation, -t2 is the change point of contact point B, t1 is the change point of contact point A, I represents the average current of A-phase current, B-phase current, and C-phase current, and x and y are constants. In addition, t1 and t2 are values corresponding to the mechanical operation characteristic information, and I is a value corresponding to the electrical operation characteristic information, and generating alarm information corresponding to the alarm value of the alarm condition expression; Integrated analysis method of switchgear operating characteristics including.

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