ÁP DỤNG MÔ HÌNH MIQP ĐỂ VẬN HÀNH TỐI ƯU TỤ BÙ CÓ ĐÓNG CẮT TRONG LƯỚI ĐIỆN PHÂN PHỐI CÓ SỰ THÂM NHẬP CỦA NGUỒN ĐIỆN PHÂN TÁN=A MIQP FORMULATION FOR OPTIMAL OPERATION OF SWITCHABLE CAPACITORS IN POWER DISTRIBUTION GRIDS WITH DISTRIBUTED GENERATION

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Tác giả: Thùy Nhung Ngô, Hữu Cầm Nguyễn, Năng Văn Phạm

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Khoa học và Công nghệ - Đại học Thái Nguyên, 2024

Mô tả vật lý: tr.308 - 317

Bộ sưu tập: Metadata

ID: 480423

Thêm vào giỏ

Sự thâm nhập ngày càng nhiều của nguồn điện phân tán và sự tăng trưởng công suất tiêu thụ của phụ tải có thể làm tăng tổn thất công suất tác dụng của mạng điện. Bài báo này trình bày mô hình tối ưu toàn phương nguyên thực hỗn hợp (MIQP) để xác định trạng thái vận hành tối ưu của tụ bù ngang có đóng cắt nhằm tối thiểu hóa tổn thất công suất hữu công trên lưới điện. Các ràng buộc của mô hình tối ưu MIQP gồm các phương trình đảm bảo sự cân bằng công suất nút, giới hạn dòng điện trên các nhánh và giới hạn điện áp các nút. Mô hình tối ưu MIQP này được biến đổi từ mô hình tối ưu phi tuyến số nguyên (MINLP) trên cơ sở áp dụng phương pháp tuyến tính hóa từng đoạn. Sự đánh giá của mô hình tối ưu MIQP được thực hiện trên lưới phân phối mẫu IEEE có 33 nút với bộ giải tối ưu CPLEX và được lập trình với ngôn ngữ GAMS. Các kịch bản khác nhau của công suất phụ tải được so sánh. Lời giải của mô hình tối ưu cho thấy, tối ưu hóa trạng thái vận hành của tụ bù ngang có đóng cắt giúp giảm đáng kể tổn thất công suất hữu công và cải thiện chất lượng điện áp của lưới phân phối. Đồng thời, thời gian tính toán của mô hình tối ưu đề xuất nhỏ hơn nhiều so với mô hình MINLP.The growing penetration of on-site generating units and the rapid growth of electricity demand could result in increased power loss. This research describes a mixed-integer quadratic programming (MIQP) based formulation to determine the optimal operation of switchable capacitors with the aim of minimizing the total power losses in power distribution systems. The proposed formulation encompasses constraints such as power flow equations, thermal limits of branches, and nodal voltage magnitude bounds. The developed MIQP formulation is converted from a mixed-integer nonlinear programming (MINLP) model by a piecewise linearization approach. The globally optimal outcome of the proposed MIQP model is calculated by utilizing the CPLEX commercial solver within the GAMS programming language. The evaluation of this MIQP formulation is implemented using an IEEE 33-node distribution network with different scenarios of load consumption power. The calculation results reveal that optimal control of switchable capacitors makes a significant contribution to the reduction of the overall power losses and enhancement of voltage profile in distribution systems. Moreover, the calculation time of the proposed MIQP model is significantly lower than that of the MINLP formulation.

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