間歇式次同步振蕩及次同步控制互作用問題研究
發(fā)布時間：2018-07-26 16:07
【摘要】：次同步振蕩是電力系統(tǒng)穩(wěn)定問題之一。隨著世界各國電力系統(tǒng)的發(fā)展,特別是我國高電壓、大容量、長距離交直流輸電的不斷建設(shè)和規(guī)�；稍偕茉吹牟⒕W(wǎng)發(fā)電,由傳統(tǒng)次同步振蕩帶來的新問題以及新的次同步振蕩現(xiàn)象相繼出現(xiàn),這給電力系統(tǒng)穩(wěn)定性研究又帶來了新的挑戰(zhàn),本文圍繞電力系統(tǒng)中出現(xiàn)的兩種新的次同步振蕩問題—間歇式次同步振蕩(Intermittent Subsynchronous Oscillation, ISSO)和次同步控制互作用(Subsynchronous Control Interaction, SSCI)開展了如下研究： 大型火電機組集群經(jīng)高壓直流輸電線路與交流混合串聯(lián)補償線路送出時可能引起頻繁超越發(fā)電機軸系累積閾值的收斂型次同步振蕩問題,本文稱為間歇式次同步振蕩SSCI。通過對比其與傳統(tǒng)HVDC引起的次同步扭振相互作用的不同特性,本文詳細(xì)分析了間歇式次同步振蕩產(chǎn)生的根本原因和作用路徑；基于經(jīng)直流送出的單機無窮大系統(tǒng),提出了一種確定電氣阻尼對間歇式次同步振蕩作用路徑中各電參量敏感度的方法,由此可確定最敏感的擾動因素；緊密結(jié)合我國蒙東呼盟系統(tǒng)多年來存在和困擾的間歇式次同步振蕩問題,搭建了該系統(tǒng)的5廠10機等效電磁暫態(tài)仿真模型,采用測試信號法分析了系統(tǒng)的電氣阻尼特性,并基于上述分析確定的最敏感因素,提出了一種與實際振蕩特性一致的間歇式次同步振蕩的仿真模擬方法,這為所研發(fā)的抑制裝置的阻尼特性仿真和實驗驗證提供了可行的仿真手段。 近年來的研究表明,含有雙饋感應(yīng)發(fā)電機的風(fēng)力發(fā)電廠經(jīng)固定串補線路遠(yuǎn)距離送出時會出現(xiàn)次同步控制互作用SSCI,可能引起風(fēng)電機組的嚴(yán)重?fù)p壞。本文基于雙饋感應(yīng)風(fēng)力發(fā)電機經(jīng)固定串聯(lián)補償送出的單機無窮大系統(tǒng),通過數(shù)學(xué)建模詳細(xì)分析了次同步控制互作用產(chǎn)生的根本原因和作用路徑,給出了發(fā)生次同步控制互作用的近似條件,提出了一種區(qū)分風(fēng)機中可能出現(xiàn)的感應(yīng)發(fā)電機效應(yīng)和次同步控制互作用的方法；采用時域仿真法分析了風(fēng)機風(fēng)速、線路串補度以及雙饋風(fēng)機轉(zhuǎn)子側(cè)變流器控制器參數(shù)對次同步控制互作用的影響；基于其作用路徑和相關(guān)控制器參數(shù)對振蕩的影響分析,提出了抑制次同步控制互作用的阻斷方法和附加阻尼方法,并對其有效性進(jìn)行了時域仿真驗證。 基于并聯(lián)電壓源型換流器的拓?fù)浣Y(jié)構(gòu),本文提出一種采用次同步振蕩動態(tài)穩(wěn)定器(Subsynchronous Oscillation-Dynamic Stabilizer, SSO-DS)抑制次同步振蕩的方法,并基于此提出一種無功電流次同步調(diào)制策略。詳細(xì)介紹了這種控制策略的具體控制流程,并采用復(fù)轉(zhuǎn)矩系數(shù)法詳細(xì)推導(dǎo)了其能夠提供的近似電氣阻尼,分析了影響該阻尼正負(fù)和大小的相關(guān)因素。針對SSO-DS這種新的抑制裝置,基于IEEE第一標(biāo)準(zhǔn)模型中由固定串補引發(fā)的次同步諧振問題,通過測試信號法和時域仿真法驗證了所提出控制策略的有效性。 針對實際呼盟系統(tǒng)交直流并列輸電方式和呼貝電廠存在的間歇式次同步振蕩問題,分別提出了寬帶通和窄帶通SSDC的阻尼控制方法,詳細(xì)分析了二者抑制間歇式次同步振蕩的可行性。通過數(shù)學(xué)推導(dǎo)和仿真,對比分析了附加勵磁阻尼控制器-SEDC與SSO-DS裝置的響應(yīng)時間以及阻尼轉(zhuǎn)矩提供能力上的不同,對比分析了基于SVC拓?fù)浣Y(jié)構(gòu)的次同步諧振動態(tài)穩(wěn)定器(Subsynchronous Resonance-Dynamic Stabilizer, SSR-DS)與SSO-DS抑制次同步振蕩的阻尼能力,最后通過時域仿真法對比了SEDC、SSR-DS與SSO-DS阻尼間歇式次同步振蕩的效果。 在以上理論與方法研究的基礎(chǔ)上,綜合考慮了響應(yīng)速度、抑制效果以及占地面積等多方面因素后,本文建議呼貝電廠采用SSO-DS的方法,并為裝置的測試搭建了實時數(shù)字—物理閉環(huán)仿真實驗平臺。介紹了仿真平臺的結(jié)構(gòu)和各部分的功能,提出了一種模擬轉(zhuǎn)速傳感器的方法用于轉(zhuǎn)速測量卡與轉(zhuǎn)速處理卡的閉環(huán)接入。利用該實時仿真環(huán)境,通過SSO-DS的輸入輸出特性測試驗證了控制器設(shè)計的準(zhǔn)確性；針對呼貝電廠間歇式次同步振蕩問題,提出了一種測量SSO-DS有效阻尼區(qū)域的方法,并通過多個工況下的測試對控制器參數(shù)進(jìn)行優(yōu)化,最后通過時域仿真法驗證了SSO-DS解決呼貝電廠次同步振蕩問題的有效性。目前,合作研制的SSO-DS裝置已用于呼貝電廠解決多年來困擾的次同步振蕩問題,并已具有較好的抑制效果。
[Abstract]:Sub synchronous oscillation is one of the problems of power system stability. With the development of power systems in all countries in the world, especially the continuous construction of high voltage, large capacity, long distance AC and DC transmission and the grid connected generation of large-scale renewable energy, the new questions and new sub synchronous oscillations brought about by the traditional sub synchronous oscillation have appeared one after another. The research on the stability of power system has brought new challenges. In this paper, two new subsynchronous oscillations (Intermittent Subsynchronous Oscillation, ISSO) and sub synchronous control interaction (Subsynchronous Control Interaction, SSCI), which appear in the power system, are studied as follows:
The problem of convergent subsynchronous oscillation in a large thermal power plant cluster which is sent out of HVDC transmission lines and AC hybrid series compensation lines may cause frequent surpassing the cumulative threshold of the generator shafting. This paper is called intermittent sub synchronous oscillating SSCI. by comparing the different characteristics of the sub synchronous torsional vibration caused by the traditional HVDC. In this paper, the fundamental reason and the action path of the intermittent subsynchronous oscillation are analyzed in detail. Based on the single machine infinite system sent by direct current, a method is proposed to determine the sensitivity of the electrical damping to the electrical parameters of the intermittent subsynchronous oscillations, which can determine the most sensitive disturbance factors and closely combine with our Mongolia. The problem of intermittent subsynchronous oscillations in the East Hulun system has been existed for many years. The equivalent electromagnetic transient simulation model of the 5 plant and 10 machine is set up. The electrical damping characteristic of the system is analyzed by the test signal method. And based on the most sensitive factor determined by the above analysis, a kind of intermittent same same as the actual oscillation characteristic is put forward. The simulation method of step oscillation provides a feasible simulation method for the damping characteristic simulation and experimental verification of the developed device.
In recent years, the research shows that the wind power plant containing double fed induction generator will appear subsynchronous control interaction SSCI when the fixed series compensation line is sent out in long distance, which may cause serious damage to the wind turbine. This paper is based on the mathematical modeling of a single feed system which is sent out by the fixed series compensation for the doubly fed induction generator. The basic reason and the action path of the subsynchronous control interaction are analyzed. The approximate condition of the interaction of the sub synchronous control is given. A method to distinguish the induction generator effect and the subsynchronous control interaction in the fan is proposed, and the wind speed, the line series compensation and the wind speed are analyzed by the time domain simulation method. The influence of the controller parameters of the doubly fed fan rotor side converter on the subsynchronous control interaction; based on the influence analysis of the action path and the relative controller parameters on the oscillation, a blocking method and an additional damping method for the suppression of subsynchronous control interaction are proposed, and the validity of this method is verified by the time domain simulation.
Based on the topology of parallel voltage source converter, a method of subsynchronous oscillation using Subsynchronous Oscillation-Dynamic Stabilizer (SSO-DS) is proposed in this paper. Based on this, a subsynchronous modulation strategy for reactive current is proposed. The specific control flow of this control strategy is introduced in detail. The approximate electrical damping is derived by the complex torque coefficient method, and the related factors affecting the positive and negative damping of the damping are analyzed. Based on the new SSO-DS suppressor, the subsynchronous resonance problem caused by the fixed series compensation in the IEEE first standard model is verified by the test signal method and the time domain simulation method. The effectiveness of the proposed control strategy is proposed.
The damping control method of broadband pass and narrow band pass SSDC is put forward respectively, and the feasibility of the two suppression of intermittent subsynchronous oscillation is analyzed in detail. The additional excitation damping control is compared and analyzed by mathematical deduction and simulation. The response time of the device -SEDC and the SSO-DS device is different from the damping torque, and the damping energy of the sub synchronous oscillation (Subsynchronous Resonance-Dynamic Stabilizer, SSR-DS) and SSO-DS suppression Subsynchronous Oscillation Based on the SVC topology structure is compared and analyzed. Finally, the time domain simulation method is used to compare SEDC, SSR-DS, and SSR-DS. The effect of SSO-DS damping intermittent subsynchronous oscillation.
On the basis of the study of the above theory and method, after considering many factors such as response speed, inhibition effect and area, this paper proposes the method of SSO-DS in Hu Bei power plant, and builds a real time digital physical closed loop simulation experiment platform for the test of the device. A method of simulating rotational speed sensor is proposed for closed loop access of speed measurement card and speed processing card. Using this real-time simulation environment, the accuracy of the controller design is verified through the SSO-DS input and output characteristics test. A kind of effective damping zone for measuring SSO-DS is proposed for the intermittent sub synchronous oscillation of the Rebeck power plant. The method of domain is used to optimize the controller parameters through several tests. Finally, the validity of SSO-DS to solve the problem of subsynchronous oscillation is verified by time domain simulation. At present, the cooperative SSO-DS device has been used to solve the problem of subsynchronous oscillation in haobi power plant for many years, and has better suppression. Effect.
【學(xué)位授予單位】：華北電力大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2014
【分類號】：TM712
本文編號：2146542
[Abstract]:Sub synchronous oscillation is one of the problems of power system stability. With the development of power systems in all countries in the world, especially the continuous construction of high voltage, large capacity, long distance AC and DC transmission and the grid connected generation of large-scale renewable energy, the new questions and new sub synchronous oscillations brought about by the traditional sub synchronous oscillation have appeared one after another. The research on the stability of power system has brought new challenges. In this paper, two new subsynchronous oscillations (Intermittent Subsynchronous Oscillation, ISSO) and sub synchronous control interaction (Subsynchronous Control Interaction, SSCI), which appear in the power system, are studied as follows:
The problem of convergent subsynchronous oscillation in a large thermal power plant cluster which is sent out of HVDC transmission lines and AC hybrid series compensation lines may cause frequent surpassing the cumulative threshold of the generator shafting. This paper is called intermittent sub synchronous oscillating SSCI. by comparing the different characteristics of the sub synchronous torsional vibration caused by the traditional HVDC. In this paper, the fundamental reason and the action path of the intermittent subsynchronous oscillation are analyzed in detail. Based on the single machine infinite system sent by direct current, a method is proposed to determine the sensitivity of the electrical damping to the electrical parameters of the intermittent subsynchronous oscillations, which can determine the most sensitive disturbance factors and closely combine with our Mongolia. The problem of intermittent subsynchronous oscillations in the East Hulun system has been existed for many years. The equivalent electromagnetic transient simulation model of the 5 plant and 10 machine is set up. The electrical damping characteristic of the system is analyzed by the test signal method. And based on the most sensitive factor determined by the above analysis, a kind of intermittent same same as the actual oscillation characteristic is put forward. The simulation method of step oscillation provides a feasible simulation method for the damping characteristic simulation and experimental verification of the developed device.
In recent years, the research shows that the wind power plant containing double fed induction generator will appear subsynchronous control interaction SSCI when the fixed series compensation line is sent out in long distance, which may cause serious damage to the wind turbine. This paper is based on the mathematical modeling of a single feed system which is sent out by the fixed series compensation for the doubly fed induction generator. The basic reason and the action path of the subsynchronous control interaction are analyzed. The approximate condition of the interaction of the sub synchronous control is given. A method to distinguish the induction generator effect and the subsynchronous control interaction in the fan is proposed, and the wind speed, the line series compensation and the wind speed are analyzed by the time domain simulation method. The influence of the controller parameters of the doubly fed fan rotor side converter on the subsynchronous control interaction; based on the influence analysis of the action path and the relative controller parameters on the oscillation, a blocking method and an additional damping method for the suppression of subsynchronous control interaction are proposed, and the validity of this method is verified by the time domain simulation.
Based on the topology of parallel voltage source converter, a method of subsynchronous oscillation using Subsynchronous Oscillation-Dynamic Stabilizer (SSO-DS) is proposed in this paper. Based on this, a subsynchronous modulation strategy for reactive current is proposed. The specific control flow of this control strategy is introduced in detail. The approximate electrical damping is derived by the complex torque coefficient method, and the related factors affecting the positive and negative damping of the damping are analyzed. Based on the new SSO-DS suppressor, the subsynchronous resonance problem caused by the fixed series compensation in the IEEE first standard model is verified by the test signal method and the time domain simulation method. The effectiveness of the proposed control strategy is proposed.
The damping control method of broadband pass and narrow band pass SSDC is put forward respectively, and the feasibility of the two suppression of intermittent subsynchronous oscillation is analyzed in detail. The additional excitation damping control is compared and analyzed by mathematical deduction and simulation. The response time of the device -SEDC and the SSO-DS device is different from the damping torque, and the damping energy of the sub synchronous oscillation (Subsynchronous Resonance-Dynamic Stabilizer, SSR-DS) and SSO-DS suppression Subsynchronous Oscillation Based on the SVC topology structure is compared and analyzed. Finally, the time domain simulation method is used to compare SEDC, SSR-DS, and SSR-DS. The effect of SSO-DS damping intermittent subsynchronous oscillation.
On the basis of the study of the above theory and method, after considering many factors such as response speed, inhibition effect and area, this paper proposes the method of SSO-DS in Hu Bei power plant, and builds a real time digital physical closed loop simulation experiment platform for the test of the device. A method of simulating rotational speed sensor is proposed for closed loop access of speed measurement card and speed processing card. Using this real-time simulation environment, the accuracy of the controller design is verified through the SSO-DS input and output characteristics test. A kind of effective damping zone for measuring SSO-DS is proposed for the intermittent sub synchronous oscillation of the Rebeck power plant. The method of domain is used to optimize the controller parameters through several tests. Finally, the validity of SSO-DS to solve the problem of subsynchronous oscillation is verified by time domain simulation. At present, the cooperative SSO-DS device has been used to solve the problem of subsynchronous oscillation in haobi power plant for many years, and has better suppression. Effect.
【學(xué)位授予單位】：華北電力大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2014
【分類號】：TM712
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，本文編號：2146542
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