發(fā)布時間：2018-01-14 05:24

  本文關(guān)鍵詞：采用柔性交流輸電設(shè)備（FACTS）最優(yōu)配置優(yōu)化電力系統(tǒng)性能的研究　出處：《湖南大學(xué)》2014年博士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 柔性交流輸電(FACTS) 可控串聯(lián)補償器(TCSC) 最小切割算法(Min-cut algorithm) 最優(yōu)化 電力系統(tǒng) 電力市場

【摘要】：本文研究基于這樣一個事實,就是由于輸電系統(tǒng)的擴展無法與日益增長的輸電服務(wù)相協(xié)調(diào)而造成了目前電力系統(tǒng)的過載嚴重問題日益凸顯。之所以造成這樣的問題是由于環(huán)境和經(jīng)濟的因素導(dǎo)致建造新的傳輸線路是困難的。因此,通過研究提高當前電力系統(tǒng)的輸電能力來滿足日益增長的電力需求以確保電力系統(tǒng)的安全運行是一個亟待解決的問題。 潮流控制設(shè)備比如柔性交流輸電設(shè)備(FACTS)對時下電網(wǎng)新的運行方式挑戰(zhàn)提供了解決方案。特別的,晶閘管控制的串聯(lián)補償設(shè)備(TCSC)是一種被選來研究的很有效的FACTS。TCSC通過改變輸電線路參數(shù)來控制網(wǎng)絡(luò)潮流。TCSC對網(wǎng)絡(luò)的影響可以看成是在相關(guān)的輸電線中嵌入一個可控的電抗。串聯(lián)電容補償通過抵消感抗部分減少傳輸線的等效串聯(lián)阻抗。因而提高了功率傳輸能力。這樣在不用重新安排發(fā)電計劃和改變網(wǎng)絡(luò)拓撲結(jié)構(gòu)的情況下,通過控制潮流可極大提高系統(tǒng)的性能。而且這樣也不會超越導(dǎo)線的熱容量的限制同時提高了電力系統(tǒng)的穩(wěn)定邊界。為了通過采用這些設(shè)備而獲得最大的效益,需要一個有效的控制方式。在研究調(diào)查柔性交流輸電設(shè)備(FACTS)的大量應(yīng)用情況后,可知針對不同目的的有效控制依賴于控制裝置的安裝位置。因此,運行人員面臨這樣一個問題就是在什么位置安裝FACTS設(shè)備能達到期望的目標。目前已有大量研究在于通過FACTS設(shè)備的最優(yōu)配置來改善現(xiàn)有電力系統(tǒng)性能,但對如何縮減最優(yōu)安裝位置的搜索范圍顯得無能為力�；诖�,本文重點研究了如何使用和選擇柔性交流輸電(TCSC)設(shè)備的最優(yōu)安裝位置來優(yōu)化電力系統(tǒng)性能。提出了一種用于確定晶閘管控制的串聯(lián)補償設(shè)備(TCSC)最優(yōu)位置的最小切割算法(Min-cut algorithm)。一日TCSC設(shè)備的安裝位置確定了,為其尋求最佳參數(shù)的最優(yōu)化問題就可以得到相應(yīng)的解決。該方法可以尋找出系統(tǒng)中最需要安裝設(shè)備的配置點,從而幫助調(diào)度人員以一種更加安全和高效的方式進行調(diào)度。采用本文方法大大減少了待選位置,從而大大減少了為提高電力系統(tǒng)性能而需要運行人員實際調(diào)查才能確定TCSC配置點的工作量。 本文的研究重點是通過TCSC設(shè)備的最優(yōu)配置點的選擇及其最優(yōu)參數(shù)的確定來優(yōu)化電力系統(tǒng)性能。本文尤其能夠通過解決電力系統(tǒng)阻塞來提高電力系統(tǒng)的傳輸能力和考慮了電力系統(tǒng)靜態(tài)穩(wěn)定與暫態(tài)穩(wěn)定約束下的電力系統(tǒng)性能。本文所提到的電力系統(tǒng)性能通過對解決安全約束最優(yōu)潮流問題,全面提高電力系統(tǒng)傳輸能力,阻塞管理和最大負荷承載能力等四個問題來進行衡量評價。研究內(nèi)容在論文第二章到第七章進行了詳細介紹,論文的要旨概括如下： 1.詳細介紹了最小切割算法來確定電力系統(tǒng)最小切割的過程。介紹了電力系統(tǒng)瓶頸的概念和TCSC的合理配置。另外介紹了開放電力市場環(huán)境下輸電領(lǐng)域重要議題,輸電阻塞影響以及目前解決輸電阻塞的方法特點。 2.提出應(yīng)用最小切割算法來確定TCSC的合理位置。研究了在正常和電網(wǎng)故障條件下采用TCSC設(shè)備優(yōu)化配置的安全約束最優(yōu)潮流問題。最優(yōu)潮流問題用以確定TCSC設(shè)備的最優(yōu)參數(shù)值,它以電力系統(tǒng)獲得經(jīng)濟效益和靜態(tài)安全為目標。 3.介紹了提高輸電系統(tǒng)最大輸電能力(TTC)的問題。提出了在安裝TCSC設(shè)備和未安裝TCSC設(shè)備條件下的電力傳輸能力的評價流程。 4.提出了一個叫做效益指標的概念,該指標用來確定輸電阻塞管理中TCSC的合理位置。該指標是指在有和沒有安裝TCSC的情況下最小發(fā)電成本的變化量。該指標可用來計算每個TCSC的位置和評價其在支路中的合理性。當取得最大的效益指標的支路就是TCSC所要確定的最優(yōu)位置。 5.提出了基爾霍夫電流定律和TCSC的最佳位置判定準則來確定TCSC設(shè)備最佳安裝容量的算法,通過獲得最大負荷承載能力和設(shè)備安裝最優(yōu)費用來確定其最佳安裝容量。仿真結(jié)果表明所提方法可以有效地找到TCSC的安裝位置,數(shù)量和容量,且該方法提高了系統(tǒng)的負荷承載能力和最小化了TCSC設(shè)備的安裝費用。 全文仿真結(jié)果表明了在TCSC設(shè)備優(yōu)化配置下大大提高了電力系統(tǒng)性能。本文主要創(chuàng)新： 1.提出了一種以最小切割來確定TCSC設(shè)備安裝位置的方法。 2.提出了利用最優(yōu)潮流問題來確定TCSC設(shè)備的最優(yōu)參數(shù)值,它以電力系統(tǒng)獲得經(jīng)濟效益和靜態(tài)安全為目標。 3.提出了一種基于TCSC設(shè)備的效益指標,該指標用來確定輸電阻塞管理中TCSC的合理位置。 4.考慮電網(wǎng)最大承載能力以及設(shè)備安裝最優(yōu)費用兩種因素,提出了一種TCSC設(shè)備的優(yōu)化配置方法,仿真結(jié)果表明了該配置方法較好地兼顧了以上兩種因素。 5.針對故障干擾條件下的電網(wǎng)暫態(tài)穩(wěn)定運行情況,提出了一種TCSC設(shè)備的優(yōu)化配置方法,同樣由仿真驗證了該配置方法對系統(tǒng)暫態(tài)具有積極穩(wěn)定作用。
[Abstract]:This paper is based on the fact that, due to the expansion of the transmission system and transmission service not increasing coordination and caused serious problems of overload current power system has become increasingly prominent. The reason of this problem is due to the environmental and economic factors to build new transmission lines is difficult. Therefore, the research on improving the transmission capacity of the power system to meet the growing demand for electricity in order to ensure the safe operation of power system is an urgent problem to be solved.
Flow control devices such as flexible AC transmission system (FACTS) provides a solution for the current operation mode of the new grid challenges. In particular, the series compensation equipment controlled by thyristor (TCSC) is a kind of selected to study FACTS.TCSC very effective by changing the transmission line parameters to control the trend of the network effects of.TCSC on network can be regarded as in transmission lines embedded in a controllable reactance of series capacitor compensation. By offsetting the inductive component reduce equivalent transmission line impedance. So improve the power transmission capacity. This arrangement plan of power generation and the change of network topology in the case of re not, by controlling the power flow can greatly improve the performance of the system. But this heat capacity cannot go beyond the limits of the wire and improve the stability boundary of power system. Through the use of these devices in order to obtain the biggest effect Yi, the need for an effective control method. In the research of flexible AC transmission equipment (FACTS) of a large number of applications, the installation position of effective control for different purposes that depend on the control device. Therefore, the operating personnel facing such a problem is in what position to install FACTS equipment to achieve the desired goal at present. There has been a lot of research is to improve the performance of the existing power system through the optimal configuration of FACTS equipment, but on how to reduce the search range of optimal location is incapable of action. Based on this, this paper focuses on how to select and use flexible AC transmission equipment (TCSC) the optimal location to optimize the performance of power system. A method for determining the series compensation thyristor control equipment is proposed (TCSC) minimum cut algorithm of the optimal location (Min-cut algorithm). The installation position of TCSC equipment to determine a day The optimization problem of seeking optimal parameters for its can be solved. This method can find out the system in the most need to install the equipment configuration, so as to help the dispatcher scheduling in a safe and efficient manner. This method greatly reduces the candidate position, thereby greatly reducing the increase the power system performance and operation personnel need actual investigation to determine the TCSC configuration point of work.
The focus of this study is to determine the optimal configuration of TCSC equipment selection and optimal parameters to optimize the performance of power system. This paper especially can solve power system congestion to improve transmission capacity of power system and taking into account the performance of the power system static stability and transient stability of power system under contract beam performance of the power system mentioned in this article. Through to solve the security constrained optimal power flow problem, improve the transmission capacity of the power system, congestion management and maximum load bearing capacity of four questions to evaluate. The research content in the second chapter to the seventh chapter in detail, the essence of the following:
1. details of the minimum cut algorithm to determine the minimum cutting process of power system. This paper introduces the concept of rational allocation and TCSC power system bottleneck. It also presents the important issues of transmission in open environment of electricity market, transmission congestion and solve method of transmission congestion.
2. put forward the reasonable application of minimum cut algorithm to determine the location of TCSC. On the security constrained optimal power flow problem by optimizing the configuration of the TCSC equipment in normal and fault conditions. In order to determine the optimal parameters of TCSC equipment with optimal power flow in power system, it is to obtain economic benefits and static security as the goal.
3., the problem of improving the maximum transmission capability (TTC) of transmission system is introduced. The evaluation process of power transmission capability under the condition of installing TCSC equipment and not installing TCSC device is put forward.
4. proposed a concept called benefit index, used to determine the reasonable position of the transmission congestion management TCSC in the index. The index refers to the situation with and without TCSC installed under the change of minimum cost of power generation quantity. The index can be used to calculate each TCSC position and evaluate its rationality. When the road branch the optimal location of the branch is the largest benefit index TCSC to determine.
5. presents the best position for Kirchhoff's current law and TCSC criterion to determine the best equipment installed capacity of TCSC algorithm, through the maximum load carrying capacity and optimal equipment installation fees to determine the best installed capacity. The simulation results show that the proposed method can find the position of the TCSC effectively, the number and capacity, and the method to improve the system load carrying capacity and minimizing the cost of installation of TCSC equipment.
The full text simulation results show that the performance of the power system is greatly improved under the optimized configuration of TCSC devices.
1. a method of determining the installation position of the TCSC device by minimum cutting is presented.
2. the optimal parameter of TCSC equipment is determined by using the optimal power flow problem, which aims at the economic and static security of the power system.
3. a benefit index based on TCSC equipment is proposed, which is used to determine the reasonable position of TCSC in the management of transmission congestion.
4., considering the two factors of the maximum carrying capacity of the grid and the optimal cost of equipment installation, a method of optimal allocation of TCSC devices is proposed. The simulation results show that the configuration method takes account of the above two factors.
5., aiming at the transient stability operation of power grid under the condition of fault jamming, a TCSC configuration optimization method is proposed, which is also verified by simulation that the configuration method has a positive and stable effect on system transient.

【學(xué)位授予單位】：湖南大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2014
【分類號】：TM721.2

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本文編號：1422216