- 學位論文
考慮多負載及諧波準位之高壓大容量被動式諧波濾波器之最佳規劃
Optimal Planning for Large Passive-Harmonic-Filters Set at High Voltage Level Considering the Multiple Loads and Harmonic Levels
摘要
為提昇電力品質，減少諧波障礙及合乎諧波管制標準，會產生諧波電流的用戶大多裝設諧波濾波器以減少諧波電流流入系統並同時改善功因，濾波器的類型大致上分主動式及被動式兩類，其電壓等級亦有高壓及低壓之分，當需要大容量的濾波器時，大都採用高壓被動式濾波器，以節省建設成本、維修費用及安裝空間，不過被動式濾波器之參數不能隨負載及系統阻抗的變化自動調整且因裝設在高壓側系統阻抗較小、變化複雜增加了被動式諧波濾波器規劃的困難度，為解決此問題，本論文考慮負載準位及諧波準位的變化規劃以多型式及多組數的被動式濾波器為基礎，首先根據負載曲線圖等背景資料進行最佳之負載準位劃分，然後將由最大負載所規劃出來的濾波器，再根據負載準位及諧波準位進行組數的分配及參數的調整，以滿足各種負載準位時的功因改善及諧波濾波的需求且濾波器的總成本最低、組數最少。文中選擇四種型式的濾波器：單調型、二階、三階及C型阻尼濾波器作為規劃的對象，首先分析每一型濾波器的特性並建立其成本函數及各種參數限制條件，然後應用模擬退火演算法進行最佳規劃，最後將舉出三個實例進行規劃以驗證本文所提之規劃方式具有優越性及實用性。
並列摘要
For improving the power quality, mitigating the damage due to harmonic and to agree with the regulations of harmonic restriction, most of the power consumers with harmonic load install the harmonic filters to reduce the harmonic current to the system and improve the power factor simultaneously. In the broad terms, two categories of harmonic filter namely passive filter and active filter can be used, and these filters can be set at low voltage or high voltage levels. When a harmonic filter with large capacity is required, however, the passive filter set at high voltage level is the better choice due to low cost of construction and maintenance and less space occupation. On other hand, because of low system impedance with complex variation at high voltage system, unsuitable set of the parameters of passive harmonic filter will add the difficult to the plan of harmonic filter. So, it is necessary to select suitable sets of filter which take the variation on system characteristic into consideration. This thesis proposes the optimal installation plan of passive harmonic filter considering the multiple loads and harmonic levels based on muti-type and muti-set of filter. The first stage is optimal planning based on load curve information and the change the parameters of the passive filters based on load levels and harmonic levels to agree with power factor correction and harmonic filtered demand of each load levels, and make the cost of the filter and bank less. Four types of filter namely single-tuned, second order, third order and C-type damped filters are selected for installation. Firstly, the characteristic of each type of filter is analyzed. The cost function and the constraints of each type of filter and system are constructed for formulating the optimization problem of installation plan of filter. Secondly, the simulated- annealing(SA) algorithm for searching optimal installation plan of filter is developed.. Finally, three cases of filter planning are presented to show that the superiority and availability of the SA algorithm and proposed installation plans of filter.