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Method and system for checking power supply network-related protection

A network-related protection and verification technology, applied in the field of power system, can solve the problem that the accuracy, reliability and timeliness of data cannot be guaranteed, the correctness, rationality and adaptability of re-checking calculation, and it does not have wide applicability and real-time performance. and other problems, to achieve the effect of wide practicability and real-time performance, improving anti-risk ability, and reducing the required time.

Pending Publication Date: 2022-01-14
CHINA EPRI ELECTRIC POWER ENG CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The original data of the power supply required by the automatic calibration software for network-related protection depends on the rating sheets or simulated offline data reported by each power plant. The accuracy, reliability and timeliness of the data cannot be guaranteed, and the power grid structure and When the operation mode changes, timely re-calculate the correctness, rationality and adaptability of the network-related protection setting and coordination relationship
At the same time, the automatic verification software of network-related protection is verified offline by means of the typical protection model that has been set, which does not have wide applicability and real-time performance, and cannot fully cover the verification needs of network-related protection of existing power plants.

Method used

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  • Method and system for checking power supply network-related protection
  • Method and system for checking power supply network-related protection
  • Method and system for checking power supply network-related protection

Examples

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Embodiment 1

[0100] Embodiment 1 of the present invention provides a verification method for power supply network-related protection, the specific flow chart is as follows figure 1 As shown, the specific process is as follows:

[0101] S101: Obtain real-time data of the smart grid dispatching technical support system from the smart grid dispatching technical support system based on the pre-built network-related protection verification data model;

[0102] S102: Scan the action state of the power supply to obtain the action power supply for network-related protection;

[0103] S103: Obtain the network-related protection action value of the network-related protection action power supply from the real-time data according to the verification type, and perform verification based on the network-related protection action value.

[0104] The above-mentioned smart grid dispatching technical support system includes a wide area measurement system (Wide Area Measurement System, WAMS) and a data acqui...

Embodiment 2

[0143] Embodiment 2 of the present application takes the frequency abnormality protection of a conventional unit as an example to illustrate an online checking method for multi-type power supply network-related protection fixed values. The implementation steps of the online calibration method are as follows:

[0144] S201: Build an offline data model for frequency anomaly protection:

[0145] Based on DL / T1309-2013 "Technical Specifications for Network-related Protection of Large Generating Sets" and DL / T1870-2018 "Technical Specifications for Power System Network Source Coordination", set the power supply configuration form and network-related protection parameter configuration form. And according to the needs of frequency anomaly protection verification, the power supply configuration form and the network-related protection parameter configuration form are integrated to obtain the frequency anomaly protection verification data model. Frequency abnormal protection check data...

Embodiment 3

[0159] Embodiment 3 of the present application takes the rotor overload protection as an example to illustrate the multi-type power supply network-related protection and the method for checking the limited cooperation relationship. The implementation steps of the online calibration method are as follows:

[0160] S301: Build an offline data model for rotor overload protection and over-excitation limitation:

[0161] Based on DL / T1309-2013 "Technical Specifications for Network-related Protection of Large Generating Sets" and DL / T1870-2018 "Technical Specifications for Power System Network Source Coordination", set the power supply configuration form and network-related protection parameter configuration form. And according to the needs of rotor overload protection and over-excitation limit check, the power supply configuration form and network-related protection parameter configuration form are integrated to obtain the sub-overload protection and over-excitation limit check dat...

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Abstract

The invention provides a method and a system for checking power supply network-related protection. The method comprises the following steps: acquiring real-time data of an intelligent power grid dispatching technical support system; acquiring a network-related protection action power supply; and acquiring a network-related protection action value of the network-related protection action power supply from the real-time data according to the checking type, and checking based on the network-related protection action value. According to the invention, online checking of power supply network-related protection can be realized, and the method has wide practicability and real-time performance. According to the method, the network-related protection action fixed value, the network-related protection time fixed value and the network-related protection cooperation relationship of each network-related action power supply are checked, and the setting loophole of the cooperation relationship can be found in time through checking so that the accuracy, reliability and timeliness of data can be ensured; and under the condition that the power grid structure and the operation mode are changed, the correctness, rationality and adaptability of the network-related protection action fixed value, the network-related protection time fixed value and the network-related protection cooperation relationship can be checked again in time, and the risk resistance of a unit under the extreme condition of the power grid is improved.

Description

technical field [0001] The invention relates to the technical field of power systems, in particular to a checking method and system for power supply network-related protection. Background technique [0002] With the rapid development of large-scale AC-DC hybrid power grids and the continuous expansion of intermittent renewable energy sources such as photovoltaics and wind power, the distribution of various types of power sources is becoming wider and wider, and the installed capacity and power generation ratio of conventional units and new energy stations are changing. The network-related security issues between the source and the network have become increasingly prominent. [0003] With the in-depth research on network-related security and stability issues between source networks, the important role of network-related protection in network-source coordination has been continuously recognized and deepened. Network-related protection refers to the part of the protection and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/02H02J13/00H02H7/26G06Q50/06G06Q10/06
CPCH02J3/02H02J13/00001H02J13/00002H02J13/00006H02J13/00007H02H7/26G06Q10/0631G06Q50/06Y02E60/00Y04S10/20Y04S10/50Y04S40/12Y04S40/121
Inventor 曹楠柯贤波施秀萍魏平黄远超李天琦郭志全李波
Owner CHINA EPRI ELECTRIC POWER ENG CO LTD