應用于改善風電并網(wǎng)特性的儲能集群控制系統(tǒng)研究與設計
發(fā)布時間：2018-08-27 13:17
【摘要】：隨著化石能源資源供應的日益緊張,大規(guī)模開發(fā)利用新能源和可再生能源,對保障能源穩(wěn)定供應、調整能源結構、保護生態(tài)環(huán)境、減少溫室氣體排放、帶動經濟轉型和產業(yè)升級具有重要意義。儲能系統(tǒng)因其具有靈活的控制功率輸出的能力,因此可以解決可再生能源發(fā)電的間歇性和隨機波動性問題,緩解高峰負荷供電的需求,提高現(xiàn)有電網(wǎng)設備的利用率和電網(wǎng)運行效率,還可以用來應對電網(wǎng)的突發(fā)性故障,提高電能質量,滿足經濟社會發(fā)展對優(yōu)質、安全、可靠供電的要求。因此,研究應用于改善風電并網(wǎng)特性的儲能集群控制系統(tǒng)對風力發(fā)電的并網(wǎng)具有十分重要的意義。 本文針對改善風電并網(wǎng)的問題,主要進行了如下研究工作： (1)本文針對目前風電并網(wǎng)存在的問題,提出了改善風電功率波動性的措施和抑制次同步諧振的措施,以使風電能夠更好的并入電力系統(tǒng),緩解能源危機。儲能技術因其具備快速的功率控制的優(yōu)點,被廣泛應用于各個領域,主要包括應用于解決可再生能源和分布式發(fā)電、智能電網(wǎng)、微電網(wǎng)、電動汽車以及國防等領域。因此本文應用儲能平抑風電功率波動,采用變時間常數(shù)一階濾波平抑波動算法,考慮了兩時間尺度風電平抑波動指標,算例仿真分析驗證了該算法的合理性,達到了用較少的儲能平抑風電功率波動的目的。同時本文研究了風電經串聯(lián)補償線路并網(wǎng)的次同步諧振問題,并提出了在雙饋異步風機(doubly fed induction generators,DFIG)轉子側附加次同步諧振阻尼控制器來抑制次同步諧振,接著通過算例仿真驗證了該控制器能夠有效地抑制SSR振蕩。 (2)針對本文對改善風電并網(wǎng)措施的理論研究,開發(fā)了儲能集群控制系統(tǒng)。該系統(tǒng)主要由中央控制中心、監(jiān)控保護一體化智能終端設備、后臺監(jiān)視軟件構成。該系統(tǒng)的核心設備是監(jiān)控保護一體化智能終端設備。該智能終端設備具有雙核處理器(ARM+DSP),性能良好,并且具有良好的可擴展性。智能終端設備具有Linux操作系統(tǒng),因此可以基于該智能終端設備靈活開發(fā)應用功能。 (3)主要進行了儲能集群控制系統(tǒng)的實驗室驗證。首先搭建了實驗室系統(tǒng),包括鋰電池儲能系統(tǒng)、功率變換器(PCS)、風電模擬輸入設備、儲能集群控制系統(tǒng)構成,接著進行儲能集群控制系統(tǒng)的平抑功率波動功能的驗證。驗證結果表明：1)由于PCS損耗、測量誤差的影響,導致測試值與指令值有一定的誤差,同時影響平抑效果：2)無論是1秒,3秒,還是10秒一次風功率值,指標都不能夠完全滿足每分鐘2%,但是隨著時間的推移該指標也能夠完全滿足；3)隨著風功率時間間隔的增大,平抑效果有明顯的改善,這是因為儲能電池的響應時間會影響指令的執(zhí)行,但是,隨著采樣時間間隔的增大,所需要的儲能容量增加,會相應的增加投資成本。
[Abstract]:With the increasingly tight supply of fossil energy resources, the large-scale development and utilization of new and renewable energy sources will ensure a stable supply of energy, adjust the energy structure, protect the ecological environment, and reduce greenhouse gas emissions. Drive economy transition and industry upgrade have important meaning. Because of its flexible ability to control power output, energy storage systems can solve the intermittent and random volatility problems of renewable energy generation and alleviate the demand of peak load power supply. It can also be used to deal with the sudden fault of the power network, improve the power quality and meet the requirements of economic and social development for high quality, safe and reliable power supply. Therefore, it is very important for wind power generation to study the energy storage cluster control system which is applied to improve the characteristics of wind power grid connection. Aiming at the problem of improving wind power grid connection, the main research work is as follows: (1) aiming at the problems existing in wind power grid connection at present, the paper puts forward some measures to improve the fluctuation of wind power and to restrain sub-synchronous resonance. So that wind power can be better integrated into the power system, to alleviate the energy crisis. Energy storage technology has been widely used in many fields due to its advantages of fast power control, including renewable energy and distributed generation, smart grid, microgrid, electric vehicle and national defense. Therefore, in this paper, the energy storage is used to stabilize the wind power fluctuation, and the variable time constant first order filter is used to suppress the fluctuation. The two-time scale wind power fluctuation control index is considered. The simulation results show that the algorithm is reasonable. The purpose of reducing the fluctuation of wind power with less energy storage is achieved. At the same time, this paper studies the sub-synchronous resonance problem of wind power connected to the grid through a series compensation line, and proposes an additional sub-synchronous resonance damping controller on the rotor side of a doubly-fed asynchronous fan (doubly fed induction generators,DFIG) to suppress the sub-synchronous resonance. Then the simulation results show that the controller can suppress the SSR oscillation effectively. (2) aiming at the theoretical research of improving wind power grid connection, the energy storage cluster control system is developed. The system is mainly composed of central control center, intelligent terminal equipment of integrated monitoring and protection, and background monitoring software. The core equipment of this system is the intelligent terminal equipment of the integration of monitoring and protection. The intelligent terminal device has good performance of dual core processor (ARM DSP),) and good expansibility. The intelligent terminal equipment has Linux operating system, so it can flexibly develop the application function based on the intelligent terminal device. (3) the laboratory verification of the energy storage cluster control system is mainly carried out. Firstly, the laboratory system is built, including the lithium battery energy storage system, the power converter (PCS), wind power analog input equipment, the energy storage cluster control system, and then the power fluctuation function of the energy storage cluster control system is verified. The results show that: 1) because of the influence of PCS loss and measurement error, there is a certain error between the test value and the instruction value, and at the same time, it affects the stabilizing effect: 1 second, 3 second, or 10 second wind power value. None of the indicators can completely meet the requirement of 2 / min, but as time goes on the index can also be fully satisfied.) with the increase of the time interval of wind power, there is a significant improvement in the calming effect. This is because the response time of the energy storage battery will affect the execution of the instruction, but with the increase of the sampling time interval, the required energy storage capacity will increase, which will increase the investment cost.
【學位授予單位】：浙江大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM614
[Abstract]:With the increasingly tight supply of fossil energy resources, the large-scale development and utilization of new and renewable energy sources will ensure a stable supply of energy, adjust the energy structure, protect the ecological environment, and reduce greenhouse gas emissions. Drive economy transition and industry upgrade have important meaning. Because of its flexible ability to control power output, energy storage systems can solve the intermittent and random volatility problems of renewable energy generation and alleviate the demand of peak load power supply. It can also be used to deal with the sudden fault of the power network, improve the power quality and meet the requirements of economic and social development for high quality, safe and reliable power supply. Therefore, it is very important for wind power generation to study the energy storage cluster control system which is applied to improve the characteristics of wind power grid connection. Aiming at the problem of improving wind power grid connection, the main research work is as follows: (1) aiming at the problems existing in wind power grid connection at present, the paper puts forward some measures to improve the fluctuation of wind power and to restrain sub-synchronous resonance. So that wind power can be better integrated into the power system, to alleviate the energy crisis. Energy storage technology has been widely used in many fields due to its advantages of fast power control, including renewable energy and distributed generation, smart grid, microgrid, electric vehicle and national defense. Therefore, in this paper, the energy storage is used to stabilize the wind power fluctuation, and the variable time constant first order filter is used to suppress the fluctuation. The two-time scale wind power fluctuation control index is considered. The simulation results show that the algorithm is reasonable. The purpose of reducing the fluctuation of wind power with less energy storage is achieved. At the same time, this paper studies the sub-synchronous resonance problem of wind power connected to the grid through a series compensation line, and proposes an additional sub-synchronous resonance damping controller on the rotor side of a doubly-fed asynchronous fan (doubly fed induction generators,DFIG) to suppress the sub-synchronous resonance. Then the simulation results show that the controller can suppress the SSR oscillation effectively. (2) aiming at the theoretical research of improving wind power grid connection, the energy storage cluster control system is developed. The system is mainly composed of central control center, intelligent terminal equipment of integrated monitoring and protection, and background monitoring software. The core equipment of this system is the intelligent terminal equipment of the integration of monitoring and protection. The intelligent terminal device has good performance of dual core processor (ARM DSP),) and good expansibility. The intelligent terminal equipment has Linux operating system, so it can flexibly develop the application function based on the intelligent terminal device. (3) the laboratory verification of the energy storage cluster control system is mainly carried out. Firstly, the laboratory system is built, including the lithium battery energy storage system, the power converter (PCS), wind power analog input equipment, the energy storage cluster control system, and then the power fluctuation function of the energy storage cluster control system is verified. The results show that: 1) because of the influence of PCS loss and measurement error, there is a certain error between the test value and the instruction value, and at the same time, it affects the stabilizing effect: 1 second, 3 second, or 10 second wind power value. None of the indicators can completely meet the requirement of 2 / min, but as time goes on the index can also be fully satisfied.) with the increase of the time interval of wind power, there is a significant improvement in the calming effect. This is because the response time of the energy storage battery will affect the execution of the instruction, but with the increase of the sampling time interval, the required energy storage capacity will increase, which will increase the investment cost.
【學位授予單位】：浙江大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM614
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