无标题

220kV 古井站 10kV 电流互感器(针对站用变、接地变高压侧CT)核算 220kV gujing station 10kV current transformer (for station transformer, grounding transformer high voltage sideCT) accounting

1) 使用 CT 参数 1:300/1A  10P40 25VA进行校核

1) Use CT parameters 1:300/1A  10P40 25VA Check

根据上述计算结果,220kV 古井站站用变及接地变的 10kV CT 保护绕组采用以上 2 种参数均可满足要求

According to the above calculation results, the 10kV CT protection winding of…

NARI-RELAYS CZX-12G 型操作继电器装置 NARI-RELAYS CZX-12G type operation relay device 1. 装置的应用范围及特点 1. Application scope and characteristics of the device

1.1. CZX-12G 型操作继电器装置按超高压输电线路继电保护统一设计原则和国网公司要求

1.1. CZX-12G operating relay device shall comply with the unified design principle of relay protection for EHV transmission lines and the requirements of State Grid Corporation

设计，本装置含有两组分…

220kV及以上电压等级主变220kV间隔失灵回路典型接线形式及整定风险分析 Typical wiring form and setting risk analysis of 220kV interval failure circuit of main transformer with voltage level of 220kV and above

按照《南方电网500kV变电站二次接线标准》及《南方电网220kV变电站二次接线标准》的要求，220kV双母线接线的断路器失灵保护，应采用母线保护装置内部的失灵电流判别功能，220kV主变间隔应采用电气量保护动作接点和操作箱三跳（TJR）动作接点作为三相跳闸启动失灵开入给220kV母线及失灵保护。云南电网部分早期投运的220～500kV主变220kV间隔使用单独的断路器辅助保护实现失灵保护的电流判别及出口，若失灵保护定值与回路…

目录

table of Contents

1 专题概述 3

1 thematic overview 3

1.1 设备布置概况 3

1.1 equipment layout overview 3

1.2 设备概况 4

1.2 equipment overview 4

1.3 一次设备介绍 5

1.3 Primary Equipment Introduction 5

1.4 元件结构及工作原理 6

1.4 Component Structure and Working Principle 6

1.5 GIS元件-断路器 6

1.5 GIS Components-Circuit Breaker 6

1.6 GIS元件-隔离开关 7

1.6 GIS Components-Disconnector 7

目  录

Contents

1概述 1

1 overview 1

1.1溪洛渡电厂电气一次系统 1

1.1 Xiluodu Power Plant Electrical Primary System 1

1.2溪洛渡电厂厂用电系统 1

1.2 Auxiliary Power System of Xiluodu Power Plant 1

2溪洛渡电厂电气一次、厂用电接线方式 1

2 Electrical Primary and Auxiliary Connection Mode 1 of Xiluodu Power Plant

2.1溪洛渡电厂电气一次接线方式 1

2.1 Primary Electrical Connection Mode 1 of Xiluodu Power Plant

2.2溪洛渡电厂厂用电接线…

±800kV 直流架空输电线路设计规范 Code for Design of ±800kV DC Overhead Transmission Lines

GB 50790-2013

局部修订条文

Partial amendments

2.1.17

2.1.17

对地距离

Distance to ground

2

2

术语和符号

Terms and symbols

2.1 术 语

2.1 technical language

ground clearance distance to ground

ground clearance distance to ground

在规定条件下，任何带电部分导线（分裂导线指分裂中心）与地面之间的最

Under specified…

Electrical safety working procedures Electrical parts of power plants and substations GB 26860-2011 1 Scope

This standard specifies the basic electrical safety requirements of electric power production units and workers in electric power workplaces.

This standard applies to all electrical equipment and related places in use by power generation companies with facilities with a voltage…

I. Daily inspections of power transformers:

1. Is the transformer running sound normal?

2. Whether the transformer oil level is normal and whether there is oil leakage in each part.

3. Transformer oil temperature and thermometer indications are normal, and remote measurement and control devices are correct.

4. Whether there are hanging objects on the busbars on each side of the…

溪洛渡电站电力送出系统概况和调度权限，电压、频率及倒闸操作的管理规定 General situation and dispatching authority of power transmission system of Xiluodu power station, management regulations on voltage, frequency and switching operation 本课件目的 Purpose of this courseware

本课件是为了配合公司培训系统建设，帮助溪洛渡电厂运行员工熟悉500KV送出系统及运行、调度相关规定编写。

This courseware is designed to cooperate with the construction of the company’s training system…

二五

纵差保护（完全差动）

纵差保护仅反应相间短路故障，取发电机机端CT和发电机中性点CT。

固定斜率的比率制动式纵差保护

按上述原则整定的比率制动特性，当发电机机端两相金属性短路时，差动保护的灵敏系数一定满足Ksen≥2.0的要求，不必进行灵敏度校验。

变斜率的比率制动式纵差保护

S2的整定值应参照保护装置的推荐值，并保证大于或等于计算值。

按上述原则整定的比率制动特性，当发电机机端两相金属性短路时，差动保护的灵敏系数一定满足Ksen≥2.0的要求，不必进行灵敏度校验。

4 General provisions 4.1 General requirements for protective devices

4.1. 1 The single-point digital input of the protection device is defined by positive logic, that is, the contact is closed as “1” and the contact is opened as “0”. The definitions of digital inputs “1” and “0” are uniformly defined as follows: a) “1” affirmatively expresses the function; b) “0” negates the expressive…

6 groups of screen (cabinet) design specifications 6.1 Conventional station group screen (cabinet) scheme 6.1.1 3/2 circuit breaker wiring

6.1. 1.1 Line, over-voltage and remote trip protection group screen (cabinet) scheme is as follows: a) Line protection 1 screen (cabinet): main protection, backup protection 1 + (over-voltage and remote trip protection 1); b) Line protection 2 screen…

Differential protection (fully differential)

The longitudinal differential protection only reflects the short-to-phase fault, and the generator CT and the generator neutral CT are taken.

Ratio-controlled braking differential protection with fixed slope

Fig. 1 Operation characteristic curve of ratio braking type differential protection with fixed slope

1) Ratio differential starting…

0 Overview

The ancient town of Yaobu, Liuzhou’s top ten key projects, is the finishing touch of the Baili Liujiang River. It is located on Dongdi South Road, under the Longlong Mountain and enjoys the core area of ​​the CBD. The total area of ​​the land is 86406.55㎡. It is located in the Hedong New District, a key development area of ​​the Liuzhou Municipal Government. The land not only has…

This is an article I wanted to write with my heart long ago.

cause

Recently, due to the rise of electric power reform and the energy Internet, friends, classmates, and friends around us are talking about this topic: What is the future of the power system automation profession?

The major of power system and automation should be a major with Chinese characteristics. Most of the students in…