【摘要】：間歇性分布式能源(如風(fēng)電和光伏)出力容易受到外界環(huán)境影響,波動(dòng)較大,且不具備可控性,當(dāng)電力系統(tǒng)中分布式能源比例較多時(shí),系統(tǒng)的穩(wěn)定性會(huì)受到?jīng)_擊。自備電廠企業(yè)可以依托現(xiàn)有的煤、電、大負(fù)荷產(chǎn)業(yè)及當(dāng)?shù)刎S富的風(fēng)能、太陽能資源,為企業(yè)及工業(yè)園區(qū)供電。因此,建立一個(gè)高水平的控制系統(tǒng),協(xié)調(diào)分布式電源的各種運(yùn)行方式,確定聯(lián)網(wǎng)和孤網(wǎng)后的功率調(diào)節(jié)策略,維持局域網(wǎng)孤網(wǎng)狀態(tài)時(shí)的頻率穩(wěn)定,已經(jīng)越來越重要,也具有很強(qiáng)的實(shí)際意義。本文在充分調(diào)研分布式電源功率調(diào)節(jié)特點(diǎn)以及孤網(wǎng)自動(dòng)發(fā)電功率控制策略的國(guó)內(nèi)外現(xiàn)狀后,針對(duì)現(xiàn)有孤網(wǎng)頻率控制都是從機(jī)組側(cè)進(jìn)行的改進(jìn)和防護(hù)措施,缺乏從整個(gè)系統(tǒng)層面上的頻率控制策略的現(xiàn)狀,提出含分布式電源的企業(yè)孤網(wǎng)自動(dòng)發(fā)電控制策略。首先分析了孤網(wǎng)運(yùn)行的可行性及技術(shù)要求,并詳細(xì)說明孤網(wǎng)穩(wěn)定控制系統(tǒng)和電網(wǎng)調(diào)控系統(tǒng)功能配置,以及自動(dòng)發(fā)電控制的實(shí)現(xiàn)策略;其次分析研究了分布式電源的特點(diǎn)及其并網(wǎng)時(shí)對(duì)電網(wǎng)帶來的影響,并針對(duì)某鋼廠設(shè)計(jì)了自動(dòng)發(fā)電控制整體方案,主要包括以下幾塊:鋼廠電網(wǎng)的仿真計(jì)算,并據(jù)此設(shè)置功率電壓自動(dòng)控制系統(tǒng)各功能模塊的參數(shù),并設(shè)計(jì)穩(wěn)控系統(tǒng)結(jié)構(gòu);基于輪流調(diào)節(jié)策略以快速響應(yīng)負(fù)荷變化,協(xié)調(diào)各機(jī)組的調(diào)頻出力分配,使頻率更快回歸到額定值的策略,此方法優(yōu)化了系統(tǒng)綜合一次調(diào)頻能力,提高了電網(wǎng)的一次調(diào)頻響應(yīng)速度,并通過輪流調(diào)節(jié)各機(jī)組,盡可能減少設(shè)備調(diào)節(jié)的次數(shù),提高了設(shè)備的穩(wěn)定性。
[Abstract]:Intermittent distributed energy (such as wind power and photovoltaic) is easy to be affected by the external environment, fluctuates greatly, and has no controllability. When the power system has more distributed energy, the stability of the system will be impacted. Self-owned power plant enterprises can rely on existing coal, electricity, heavy load industries and abundant local wind and solar energy resources to supply electricity to enterprises and industrial parks. Therefore, it has become more and more important to establish a high level control system, coordinate all kinds of operation modes of distributed power supply, determine the power regulation strategy after networking and isolated network, and maintain the frequency stability of LAN in the state of isolated network. Also has very strong practical significance. After investigating the characteristics of power regulation of distributed power generation and the current situation of power control strategy at home and abroad, this paper aims at the improvement and protection measures of frequency control of isolated grid from the side of unit. Lacking the present situation of frequency control strategy on the whole system level, a strategy of automatic generation control for enterprise isolated network with distributed power supply is proposed. Firstly, the feasibility and technical requirements of the isolated network operation are analyzed, and the function configuration of the isolated network stability control system and the power network control system, as well as the realization strategy of the automatic generation control system are described in detail. Secondly, this paper analyzes the characteristics of distributed generation and its influence on the power network when connected to the grid, and designs an overall scheme of automatic generation control for a steel plant, which mainly includes the following parts: the simulation calculation of the steel plant power grid, The parameters of each function module of the power and voltage automatic control system are set, and the structure of the stability control system is designed. The strategy of returning frequency to rated value more quickly, this method optimizes the system integrated primary frequency modulation ability, improves the response speed of primary frequency modulation of power network, and reduces the frequency of equipment regulation as much as possible by adjusting each unit in turn. The stability of the equipment is improved.
【學(xué)位授予單位】：華北電力大學(xué)(北京)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM73;TM61

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