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Monitoring method for abnormal operation of power distribution interconnection switch

A contact switch and power distribution contact technology, applied in the direction of electrical components, circuit devices, etc., can solve the problems of power failure risk of distribution network, failure to give prompts in time, misoperation of switch mechanism, etc., and achieve the effect of ensuring safe operation

Active Publication Date: 2021-12-14
GUANGDONG POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Under normal circumstances, the contact switch in the distribution network is in a hot standby state, which can effectively control the operation mode of the distribution network to a certain extent. The reason is that there is a situation where the tie switch automatically closes in the case of non-fault and non-operation, and it is impossible to effectively identify whether the tie switch is caused by a misjudgment. Give a reminder, resulting in the risk of power outage in the distribution network, seriously affecting the safe and stable operation of the distribution network

Method used

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  • Monitoring method for abnormal operation of power distribution interconnection switch
  • Monitoring method for abnormal operation of power distribution interconnection switch
  • Monitoring method for abnormal operation of power distribution interconnection switch

Examples

Experimental program
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Embodiment 1

[0019] figure 1 Embodiment 1 of the present invention provides a flow chart of a method for monitoring abnormality of a distribution tie switch. This embodiment is applicable to timely and accurately monitoring the abnormality state of a tie switch in a distribution network. The distribution network generally includes multiple main power stations for power supply. The main power station supplies power to the power-demanding equipment through the power supply feeder, thus forming a distribution network. The distribution network also includes various power grid equipment such as control cabinets. The feeder in the distribution network is also provided with a contact switch, which can realize the operation of opening and closing to control the connection and disconnection of the circuit in the distribution network as required. When the contact switch is closed, it may cause line loop closure. Line loop closing may be a correct operation, or it may be a wrong operation. The embo...

Embodiment 2

[0037] figure 2 Embodiment 2 of the present invention provides a flow chart for judging the telemetry and telesignaling state of a tie switch in a method for monitoring abnormality of a power distribution tie switch. Based on the foregoing embodiments, this embodiment specifically provides a solution for judging the telemetry and telesignaling status of a tie switch. On the basis of the foregoing embodiments, the technical solution of this embodiment further includes:

[0038] S201. Obtain the current value and superimposed current value of the feeder connected to each main power station, and obtain the current value, telemetry state, remote signal displacement state and manual setting state of the connection switch connected to the power master station;

[0039] Wherein, the feeder line is arranged on the line of the main power station, and the number of feeder lines connected to the main power station may be two or more. The current value and superimposed current value of...

Embodiment 3

[0049] image 3 Embodiment 3 of the present invention provides a flow chart of obtaining the connection state of the tie switch in the method for monitoring the abnormality of the power distribution tie switch. Based on the foregoing embodiments, this embodiment specifically provides a specific solution for obtaining the connection state of a tie switch. On the basis of the foregoing embodiments, the technical solution of this embodiment further includes:

[0050] S301. Obtain the graphical topology of the main station in the distribution network; wherein, the distribution network includes at least a main power station, a feeder for power supply, and the tie switch connected between the main power station and the feeder;

[0051] Among them, the graphic topology of the master station in the distribution network can be drawn by the graphic topology editing and modeling tool according to the actual situation of the distribution network. The graphic topology can be drawn in adv...

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Abstract

The embodiment of the invention discloses a monitoring method for abnormal operation of a power distribution interconnection switch. The method comprises the following steps: if the telemetering and telesignaling state of the interconnection switch connected with a power supply main station is abnormal, or the interconnection switch is a non-automatic switch, taking the interconnection switch as a target interconnection switch; obtaining respective current change difference values of two sides of the target interconnection switch and a change ratio of current superposition values of the two sides; and identifying the connection state of the target connection switch according to the current change difference value and the superposition value change ratio. According to the embodiment of the invention, the method solves a problem that whether the interconnection switch is abnormal or not cannot be judged when the power distribution interconnection switch is abnormal, and achieves the real-time monitoring of the abnormal operation of the power distribution interconnection switch.

Description

technical field [0001] The embodiment of the present invention relates to a power system detection and monitoring technology, and in particular to a monitoring method for abnormal movement of a power distribution tie switch. Background technique [0002] With the continuous increase of people's demand for electricity, distribution networks are widely distributed in various places to ensure the electricity demand of users. [0003] Under normal circumstances, the contact switch in the distribution network is in a hot standby state, which can effectively control the operation mode of the distribution network to a certain extent. The reason is that there is a situation where the tie switch automatically closes in the case of non-fault and non-operation, and it is impossible to effectively identify whether the tie switch is caused by a misjudgment. A prompt is given, resulting in the risk of power outage in the distribution network, which seriously affects the safe and stable o...

Claims

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Application Information

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IPC IPC(8): H02J13/00
CPCH02J13/0004
Inventor 蔡建逸吴泽鑫杨晓仪林裕新朱俊樾沈伟林晓慧彭细近杨旭涛肖烁陈楠罗滨
Owner GUANGDONG POWER GRID CO LTD