Method for adaptively setting set value of protection device

A protection device and self-adaptive technology, applied in the direction of automatic disconnection emergency protection device, emergency protection circuit device, circuit device, etc., can solve the problems of overload node voltage offset, fluctuation and other problems, achieve differentiation and reduce errors. moving effect

Active Publication Date: 2018-05-25
广东电网有限责任公司韶关供电局
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  • Application Information

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Problems solved by technology

In this mode, the voltage (current) at the back end of the distribution network fluctuates greatly with the change of operation mode, causing the voltage (current) deviation of some load nodes to exceed the standard

Method used

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  • Method for adaptively setting set value of protection device
  • Method for adaptively setting set value of protection device
  • Method for adaptively setting set value of protection device

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings. It should be noted that the accompanying drawings are only for illustrative purposes and should not be construed as limitations on this patent.

[0022] Such as figure 1 As shown, a method for adaptively setting the value of the protection device, based on the operation of the protection device, includes the following steps:

[0023] S1: Always perform self-inspection on the hardware circuit and operating status of the device. If a hardware fault or abnormal operation is detected, the device will be blocked, and all protection functions and self-adaptive setting functions of the device will be blocked. If the self-testing device is normal, the patrol inspection will be carried out Procedure S2;

[0024] S2: Collect the electrical quantity A(t) of the power station and judge whether A(t) is within the setting range A1~A2, if it is within the setting range, then execute s...

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Abstract

The invention relates to the technical field of power system automation, in particular to a method for adaptively setting the set value of a protection device. When a power grid operates normally, theprotection device operates in an inspection process, whether a power system has a fault or not is judged according to an electrical quantity collected in real time, and the electrical quantity set value of a splitting device is calculated and updated in real time; if the electrical quantity is stable and does not exceed a set range, the protection device continues operating in the inspection process; if the electrical quantity exceeds the set range, a fault handling process is started, the electrical quantity sampled in real time is only used for fault judgment, and the electrical quantity set value of the splitting device is not updated any more. Thus, the protection set value of the small-hydropower-station splitting protection device can be updated in real time, the protection settingvalue is calculated in real time, and the method can adapt to set values under changing of different power grid operation modes and seasons, relieve the workload of relay protection and maintenance and debugging personnel and improve the accurate action rate of the small-hydropower-station splitting device, thereby ensuring safe and stable operation and reliable power supply of the power grid.

Description

technical field [0001] The invention relates to the technical field of power system automation, and more specifically, to a method for self-adaptively setting the value of a protection device. Background technique [0002] When the relay protection staff debugs the equipment, the equipment setting needs to be set in conjunction with the grid operation mode. The equipment setting value cannot be adjusted in time to follow the protection of the grid operation mode, resulting in malfunction and refusal of the device. [0003] At present, there are rich hydropower resources in mountainous areas, and a large number of substations have hydropower connected to the Internet. At present, small hydropower stations are mainly connected to the Internet through 10kV lines, and most of the Ts are connected to 10kV feeders. send development model. In this mode, the voltage (current) at the back end of the distribution network fluctuates greatly with the change of the operation mode, causi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H3/00
CPCH02H3/006
Inventor 陈志峰徐兴发
Owner 广东电网有限责任公司韶关供电局
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