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24 results on '"Ni Shiyuan"'

1. Optimal Dispatch of Regional Integrated Heating and Power System Based on Differential Thermal Inertia Model

Author

Ni Shiyuan, Lin Yi, Yao Defei, Wu Guilian, Wang Zehao, and Huang Yan

Subjects
Environmental sciences, GE1-350
Abstract

As the physical carrier of Energy Internet, regional integrated energy system (RIES) has become an important role for improving comprehensive energy utilization efficiency. First, a subtle thermodynamic model of buildings and water-heating network was constructed based on differential thermal inertia model. Different from the traditional single-layer wall thermal inertial model, this paper constructed multi-layer wall thermal model. Then, an optimization scheme combining electricity and heat was established. The optimization results show that, compared with the traditional single-layer wall thermal inertia model, the proposed multi-layer wall thermal inertia model has better performance. The proposed comprehensive energy optimization scheme can reduce the cost of electricity while maintaining indoor comfort, and can provide a reference for the system operation status for distribution network dispatching.

Published
2021
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2. Distributionally Robust Stochastic Optimal Power Flow Considering N-1 Security Constraints with renewable

Author

Ni Shiyuan, Wu Guilian, Wang Zehao, Lin Yi, Yao Defei, and Zhang Ruosi

Subjects
Environmental sciences, GE1-350
Abstract

This paper proposes a data-driven stochastic optimal power flow model considering the uncertainties of renewable energy sources. The proposed model also focuses on the constraints of reactive voltage, aiming at improving the safety of voltage amplitude and reactive power output at each bus. Using data-driven linearization techniques, we simplified the calculation of system. In addition, Wasserstein ambiguity set was used to describe the uncertainties of renewable energy prediction error distribution, and a robust stochastic optimal power flow model considering N-1 security constraints is established. The simulation results on IEEE-39 system showed the accuracy and effectiveness of the distributionally robust optimization model and the reactive voltage constraint model provided a more stable operation schedule.

Published
2021
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11. Multi-Objective Bi-Level Optimal Dispatch Method of Active Distribution Network Considering Dynamic Reconfigurations

Author

Zheng Jieyun, Shi Pengjia, Zhang Linyao, Ni Shiyuan, and Wu Guilian

Subjects
Capacitor, Control theory, Computer science, law, Encoding (memory), Static VAR compensator, Control reconfiguration, AC power, Grid, Decimal, Power (physics), law.invention
Abstract

A bi-level optimal dispatching model for active distribution network considering dynamic reconfiguration is put forward. The coordination optimized is realized by defining same optimal function of upper and lower level which are lowest operation cost and best fast voltage stability. The decision variables of upper level are grid structure at every reconfiguration period. decimal encoding method based on fundamental loops is employed to improve the calculation efficiency. The decision variables of lower level are power of distribution generation, reactive power of capacitor banks and static var compensator, tap position of OLTC. IEEE 33 bus system is employed to verify the proposed method.

Published
2020

23. Distribution Network Economic Dispatch Based on Network Reconfiguration and Electric-heat Combined Demand Response

Author

Kong Xiangyu, Guo Yue, Ni Shiyuan, and Zhao Juan

Subjects
Demand response, Distribution networks, Electrical load, Computer science, 020209 energy, 0202 electrical engineering, electronic engineering, information engineering, Economic dispatch, Electric heating, 02 engineering and technology, Power grid, Network reconfiguration, Automotive engineering
Abstract

With the continuous growth of multi-type loads such as electric heating in the power grid, traditional single-scheduled means such as electric load demand response or network reconstruction can not meet the demand of safe economic operation of the distribution network. The validity and practicability of the proposed model and method are verified by an example.

Published
2019

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