﻿ 海洋石油平台微电网的建模分析 Modeling Analysis of Micro Grid of Offshore Oil Platform

Journal of Electrical Engineering
Vol.04 No.04(2016), Article ID:19164,8 pages
10.12677/JEE.2016.44024

Modeling Analysis of Micro Grid of Offshore Oil Platform

Hualin Gong1, Jinquan Zhang2, Zhiqiang Yang2, Huan Zhang2

1State Grid Chengdu Electric Power Supply Company, Chengdu Sichuan

2School of Electrical and Information, Southwest Petroleum University, Chengdu Sichuan

Received: Nov. 18th, 2016; accepted: Dec. 2nd, 2016; published: Dec. 8th, 2016

ABSTRACT

Offshore oil platform micro grid is a very important part of offshore oil platform, and its stability plays an important role in the safety of offshore oil platform. Therefore, establishing mathematical model of offshore oil platform of the micro grid and studying its stability helps monitor and access the safety state of offshore oil platform of the micro grid, and this provides early warning strategy and suggestions for the electrical engineers and management personnel operating platform and does good for improving the safe operation level of the offshore platform. These actions are of much theoretical value and realistic meaning. This paper first introduces the characteristics of offshore oil platform of the micro grid, then analyzes the main components of gas turbine, sets up the model by PSCAD, and establishes the model according to the circuit structure of the micro grid diagram. It carries out a series of simulation in different operating conditions and different motor load proportion by assuming the motor as the main load first and gets relevant conclusions.

Keywords:Offshore Oil Platform, Micro Grid, PSCAD, Modeling Analysis

1成都供电公司，四川 成都

2西南石油大学电气信息学院，四川 成都

1. 引言

2. 燃气轮机建模分析 [6]

(1) 该模型适用于暂态、稳态运行分析时，需忽略微燃机快速的动态变化，比如启动、停机或内部故障等过程。

(2) 由于能量回收器对模型动态响应时间的影响细微，故忽略其影响，不对其进行建模。

(3) 除温度控制采用有名值外，微燃机的模型及其他控制模块均采用标幺值。

3. 微电网建模的频率分析

Figure 1. Gas turbine model

Figure 2. Schematic diagram of micro grid simulation circuit

(1) 当负荷小于各台燃气轮机总的发电量时，K1开关点流过的负荷方向为：海洋石油平台微电网流向大电网。具有调节能力的机组对负荷的波动进行调节，维持供需平衡。

(2) 当负荷大于各台燃气轮机总的发电量时，K1开关点流过的负荷方向为：大电网流向海洋石油平台微电网。大电网给海洋石油平台微电网供电，满足海洋石油平台供电需求。

(3) 当某一台燃气轮机进行检修的时候，停止运行相应的机组，并调整另一台机组的转速和燃料基准值，从而调整出力。

3.1. 孤岛模式

3.2. 联网模式

Figure 3. Circuit model of micro grid

Figure 4. Simulation results in island mode

Figure 5. Simulation results of fault at B point in networking mode

3.3. 不同故障点

Figure 6. Simulation results of fault at A point in networking mode

4. 仿真结果分析

(1) 在孤岛模式运行方式下，当B点发生三相短路的瞬间，1号燃机轮机会退出微电网的运行，此时海洋平台上的所有负荷将全部转移到2号燃气轮机之上。2号燃气轮机通过下垂控制及其内部的调节系统，会迅速的增加输出功率，以满足系统负荷对功率的要求。同时，由于电动机负荷对电网的冲击最大，则当电动机负荷占比越大，则系统的频率稳定性越低。

(2) 在联网模式下，对微电网的A、B两处分别发生故障时，由于大电网能随时满足海洋平台微电网的有功功率需求，所以其对微电网的稳定性影响较小。

Modeling Analysis of Micro Grid of Offshore Oil Platform[J]. 电气工程, 2016, 04(04): 187-194. http://dx.doi.org/10.12677/JEE.2016.44024

1. 1. 周念成, 邓浩, 王强钢, 李春艳. 光伏微型燃气轮机混合微电网的建模与仿真[J]. 华东电力, 2011, 1(39): 86-91.

2. 2. 周二雄, 李凤婷, 朱贺. 微电网的建模仿真研究[J]. 计算机仿真, 2013(6): 133-137.

3. 3. 刘志勇. 微电网建模仿真研究及平台开发[D]: [硕士学位论文]. 长沙: 湖南大学, 2010.

4. 4. 李明慧, 李国庆, 王鹤, 白杨森, 张洋. 微电网建模及并网控制仿真[J]. 低压电器, 2012(8): 27-31.

5. 5. 韩国志. 微电网建模及其运行和控制的仿真[D]: [硕士学位论文]. 济南: 山东大学, 2014.

6. 6. 黄伟, 凡广宽, 牛铭. 微型燃气轮机发电系统仿真模型研究[J]. 电网与清洁能源, 2011, 4(27): 4-7.

7. 7. Rowen, W.I. (1983) Simpli-fied Mathematical Representations of Heavy-Duty Gas Turbines. Journal of Engineering for Power, 105, 865-869.

8. 8. 李政, 王德慧, 薛亚丽, 等. 微型燃气轮机的建模研究(上)——动态特性分析[J]. 中国动力工程学报, 2005, 25(1): 13-17.