Current Issue

  • Distributed photovoltaic generation in the electricity market: status, mode and strategy

    Abstract

      2018-10-26

    With the increasingly serious climate change and energy crisis, photovoltaic (PV) generation, as one of the most important renewable energy resources, has experienced dramatic growth worldwide due to its environmental friendliness. However, the uncertainty and intermittency of PV bring inevitable challenges to power systems. With the rapid development of distributed PV and the continuous evolution of the electricity market, increasingly high penetration levels of distributed PV generation have led to a series of problems in power system operations, such as voltage fluctuation, frequency deviation, etc. The market participation of distributed PV needs to be solved. Reasonable market participation form, market mechanism and bidding strategies are vital to the development of distributed PV in the electricity market. This paper comprehensively reviews the development and impacts of distributed PV in the electricity market and discusses the relevant market modes and bidding strategies in detail.

  • Clean energy consumption of power systems towards smart agriculture: roadmap, bottlenecks and technologies

    Abstract

      2018-10-26

    Over the past decades, both agriculture and power systems have faced serious problems, such as the power supply shortage in agriculture, and difficulties of clean energy consumption in the power system. To address and overcome these issues, this paper proposes an idea to combine smart agriculture and clean energy consumption, use surplus clean energy to supply agriculture production, and utilize smart agriculture to support power system with clean energy penetration. A comprehensive review has been conducted to first depict the roadmap of coupling a agriculture-clean energy system, analyze their feasibilities and advantages. The recent technologies and bottlenecks are summarized and evaluated for the development of a combined system consisting of smart agriculture production and clean energy consumption. Several case studies are introduced to explore the mutual benefits of agriculture-clean energy systems in both the energy and food industries.

  • Day-ahead scheduling of multi-carrier energy systems with multi-type energy storages and wind power

    Abstract

      2018-10-26

    The integration of large-scale wind power brings challenges to the operation of integrated energy systems (IES). In this paper, a day-ahead scheduling model for IES with wind power and multi-type energy storage is proposed in a scenario-based stochastic programming framework. The structure of the IES consists of electricity, natural gas, and heating networks which are all included in the model. Operational constraints for IES incorporating multi-type energy storage devices are also considered. The constraints of the electricity network, natural gas network and heating network are formulated, and nonlinear constraints are linearized. The calculation method for the correlation of wind speed between wind farms based on historical data is proposed. Uncertainties of correlated wind power were represented by creating multiple representative scenarios with different probabilities, and this was done using the Latin hypercube sampling (LHS) method. The stochastic scheduling model is formulated as a mixed integer linear programming (MILP) problem with the objective function of minimizing the total expected operation cost. Numerical results on a modified PJM 5-bus electricity system with a seven-node natural gas system and a six-node heating system validate the proposed model. The results demonstrate that multi-type energy storage devices can help reduce wind power curtailments and improve the operational flexibility of IES.

  • A mechanism of intraday market design for promoting wind power integration

    Abstract

      2018-10-26

    Wind power generation has been developing rapidly in recent years. Therefore, the mechanism for promoting wind power integration becomes increasingly important. In this paper, a novel mechanism of intraday market is proposed, which can utilize updating information of wind power and effectively exploit the shiftable load. The mechanism is compatible with the existing market framework, and promotes wind power producers (WPPs) to be more competitive in the market. Thus, the WPPs could make decisions for multiple market transactions in various trading timescales according to the market price. Moreover, the WPPs can optimize their decisions continuously in the intraday market at different time points in the model. The case study on IEEE-RTS verifies the proposed method is valid and feasible. It can support wind power integration and increase the benefit of the whole system as well.

  • Comparing competition equilibrium with nash equilibrium in electric power market

    Abstract

      2018-10-26

    The Nash equilibrium and competition equilibrium have been widely studied in the electric power market up to now. In this paper, it is explained that the Nash equilibrium can be achieved by using marginal cost pricing and the competition equilibrium can be performed by using accounting cost pricing based on the model of the power market system. The comparison between the Nash equilibrium and competition equilibrium indicates that surplus and unfair allocation of market benefits may be obtained by the Nash equilibrium, and the competition equilibrium realizes the optimization in economics with maximum market efficiency and fairness for market benefit allocations while the optimization in mathematics is achieved by the Nash equilibrium. There is sameness between the Nash equilibrium and competition equilibrium at the point when the power network characteristics are disregarded. The case study is made on a IEEE 30-bus system, and the calculation results indicate that it is the key issue to perform the competition equilibrium by using accounting cost pricing.

Introduction

CSEEJPESThe articles published in this journal will focus on advanced concepts, technologies, methodologies and practices associated with all aspects concerning power and energy systems...
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