共查询到20条相似文献,搜索用时 15 毫秒
1.
不确定性引起备用的探讨 总被引:33,自引:9,他引:24
为应付电力系统中各种不确定性因素造成的供需不平衡,系统运行必须设置备用,备用会增加电力商品的成本,因此明确备用的本质和责任尤为重要.文章分析了备用的物理本质,讨论了由于电力供给的不确定性、电力需求的不确定性和输电元件故障的不确定性引起的备用,定量分析、探讨了备用的隶属关系及在市场成员中的分摊原则,各市场参与者应根据自身对系统风险度的影响确定应分摊的备用. 相似文献
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初级电力市场中分时段生产模拟算法研究 总被引:1,自引:0,他引:1
针对我国电力初级阶段市场中分峰、谷、(平)时段分别竞价的实际情况,对等效电量函数法进行改进。该文将传统随机模拟中分为水、火电机组的分类扩展到将机组分为电量、容量两类,并讨论了电量机组合并后也可以安排出合理运行方式;提出随机生产模拟需要分时段进行,并推导出将多个时段的可靠性合并为整个周期可靠性指标的公式;进一步按照风险分散的思路,得到日调度计划。算例表明,该文所提方法较好处理了市场环境下的新情况,所得结果合理可行。 相似文献
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《The Electricity Journal》2019,32(5):30-34
Microgrids are a collection of distributed energy resources (DER) within a specific boundary, with a control system for their management and operations at the point of interconnection with the distribution utility. As microgrid concepts evolve, they are being applied to aggregations of DER outside boundaries with appropriate controls for operation with transmission and distribution utilities and participation in markets. This article marks this evolution and points towards the common functionalities of microgrid controllers and distributed energy management systems for integration of DER into transmission and distribution operations and markets. 相似文献
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发电侧电力市场中安全校核算法的研究与实现 总被引:10,自引:5,他引:10
为适应当前我国电力市场下新的运营规则提出了安全校核算法,并充分利用原有发电计划程序。在安全校核中,系统如果可以仅仅通过调整机组出力来消除过载,则给出机组出力调整措施;如果系统必须要通过调整机组开停计划才能消除过载,则给出建议的机组开停指标;从而与通用的发电计划算法一起,可以生成带安全校核的闭环交易计算。该算法 以系统购电费用最小为目标,基于线性规划中的对偶单纯纯形方法,同时利用松纯技术和降阶基方程技巧,并且考虑了机组报价曲线的非线性特点。依据该算法所开发的应用软件已经在辽宁省发电侧电力市场中投入实时运行,实际计算结果表明,该算法收敛速度快,计算结果合理、符合系统实际,与发电计划一起实现了带安全校核的闭环实时交易计划。 相似文献
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国外电力市场的研究与浅析 总被引:7,自引:2,他引:5
列举了国外电力市场的三种典型模式,总结了它们的经验和教训,并对国外电力市场进行了初步分析,试图从中吸取有益经验,为我国开展电力市场所用。 相似文献
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In a competitive electricity market, Generation companies (Gencos) face price risk and delivery risk that affect their profitability. Risk management is an important and essential part in the Genco's decision making. In this paper, risk management through diversification is considered. The problem of energy allocation between spot markets and bilateral contracts is formulated as a general portfolio optimization problem with a risk-free asset and n risky assets. Historical data of the PJM electricity market are used to demonstrate the approach. 相似文献
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湖南模拟电力市场发电经济调度系统 总被引:2,自引:0,他引:2
介绍了湖南模拟电力市场发电经济调度系统课题的研究开发成果、系统结构与特点等。该系统创新了改进型优序法,实现了电力市场条件下的水火电联合经济调度,在投入实际运行后,取得了巨大的经济效益和社会效益。 相似文献
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发电市场预调度计划模型及算法的研究 总被引:3,自引:0,他引:3
结合中国发电市场的实际情况,根据最优潮流原理,以整个预调度周期内的市场购电费用(MPC)最小为目标,建立了预调度计划模型,并根据预调度计划的特点,将模型目标简化为各时段的市场清算电价(MCP0最小,同时设计了三段式预调度算法:用静态规划法求解整个顶调度计划周期内的优化问题,用优先级求解机组组合问题,用改进的Powell法求解最优潮流问题。算例结果表明,预调度模型和算法下的市场清算电价能跟踪系统负荷变化,且该模型算法具有复杂度低、结果最佳性较好的特点。 相似文献
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《The Electricity Journal》2022,35(9):107204
The ongoing energy transition, including the rapid electrification of energy services, reinforces the importance of secure and reliable electricity infrastructure. Electricity as a critical energy carrier cuts across sectoral boundaries, including but not limited to public health, national security, education, and transportation. Electricity markets treat electricity as a commodity bought and sold in the different restructured markets of the United States and are a critical feature of power systems shaping the energy transition. However, current electricity market developments primarily rely on techno-economic indicators and fall short of incorporating ethical considerations to spur energy transition towards 100% renewable electricity as end-use energy. Even though electricity markets are designed based on the assumption that they are socially valuable, they essentially go unmeasured based on social and ethical parameters and are largely measured using technical and economic tools and criteria. These inadequacies in the development of electricity markets fail to provide energy and other allied services, particularly during and in the aftermath of a disaster, to the people who need them the most. This paper aims to provide an analytical framework using the foundational approach of energy justice for looking at the electricity market development. The paper utilizes the case of the Texas electricity market and its role in dealing with the electricity crisis in Texas during the winter storm of 2021 from the critical lens of energy justice. The paper shows that using the foundational approach of energy justice, the electricity market can be designed more ethically by considering electricity as means rather than only a market commodity. 相似文献
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《The Electricity Journal》2022,35(4):107105
Motivated by PJM’s recently proposed incentive scheme for capacity delivery during system emergencies, this paper develops two wholesale market products that a generator may use to manage the scheme’s risk. The first product is an insurance that removes the scheme’s downside risk due to the penalty for under-delivery. The second product is a forward contract that insulates a generator from the scheme’s risk due to the penalty for under-delivery and reward for over-delivery. The paper’s main contribution is how to price these newly developed products using readily available data. 相似文献
11.
《The Electricity Journal》2020,33(7):106814
Trade liberalization in the electricity market has become widespread over the past three decades. Emergent electricity markets are still exposed to challenges such as the seasonal effect on demand and respective trade volume; lack of optimum financial instruments; less effective practices to manage operations and risks in the extremely price volatile market. In this backdrop, the paper aims to examine the condition of the dominant nation for electricity consumption, India, where for the establishment of advance seasonal hedging practices hybrid seasonal options can be introduced and the corresponding cost of hedging has been estimated. The entire study is evaluated in the electricity trading market in the mid of 2013−2018. The analysis not only helps in estimating the cost of hedging for electricity spot exposures but also suggests optimum time frame to traders, policymakers and trading institutions where through this application risks can be well managed and costs can be controlled. The outcome of the paper depicts the seasonal variation impact on hedging cost and also portrays optimum days for trading to hedge against price risks. This study also provides a background for policymakers to amend policies where gaps are persistent. 相似文献
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电力市场中弹性运行备用研究 总被引:12,自引:3,他引:12
备用市场组织方式关系到备用市场稳定运行.传统顺序出清方式中,备用出清的先后顺序对出清结果影响重大,市场的公平性不容易保障.该文在弹性备用框架下,提出各类备用联合出清的新型交易形式.引入可靠性指标LOLP(电力不足概率),将备用容量报价和电量报价结合起来作为综合报价指标,并分析了按报价付费模式和统一出清价模式在备用市场中的应用.在此基础上,结合可靠性评估理论,建立了同时出清10分钟备用和30分钟备用的弹性备用综合模型.文章采用启发式算法求解,简便实用.标准测试系统RTS96的仿真计算结果表明该模型的有效性 相似文献
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电力市场日前交易计划的分布式协同算法 总被引:1,自引:0,他引:1
将电力市场中各交易中心的计算机系统看做一个分布式计算平台,提出了一种基于分布式协同计算的电力市场日前交易计划算法。介绍了电力市场日前交易计划计算的数学模型及求解该模型的分布式协同算法:先由基层交易中心完成区域内交易预计划;然后上级交易中心协调各基层交易中心通过迭代计算完成区域间交易计划,在交易计算的同时完成全系统的电网安全校核;最后由基层交易中心在区域间交易计划的基础上形成最终的区域内交易计划。该算法兼顾了交易优化计算与安全校核计算,仿真算例结果表明这种分布式协同算法是有效的。 相似文献
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电力市场环境下发电机组的最优检修策略初探 总被引:13,自引:1,他引:13
在电力市场环境下,由于市场电价具有高度的波动性,在不同的时段安排发电机组的检修对相关发电公司的收益自然有不同的影响,发电公司就需要优化检修策略以使检修期间的收益损失最小化.由于发电机组的检修计划是预先做出的,这使得发电公司在进行检修决策时所依据的信息,特别是电价信息,是不完整的或不确定的,在此基础上作出的决策就不可避免地带有一定的风险.在计及风险的条件下,作者对制定发电公司的最优检修策略问题进行了初步的探索性研究,针对所研究的发电公司作为价格接受者(price taker)和非价格接受者这两种情况,以预测的市场电价为基础,给出了求解该问题的方法框架,构造了数学模型,提出了求解方法,最后用算例说明了该方法的基本特征. 相似文献
16.
风险管理机制在电能质量市场中的应用初探 总被引:5,自引:4,他引:1
电能质量市场的提出充实和完善了电力市场,同时也对现有管理方法提出了更高的要求.尤其是电能质量扰动的经济性评价、不同质量等级电能的定价等一系列经济性问题,需要用户和供电部门之间的信息共享才能实现,但是作为经济利益对立的经济实体来说这又是很难实现的.作者将风险管理机制引入电能质量市场,采用基本电价叠加电能质量保险费的价格形成机制,将电能质量市场中最困难的经济评估问题转化为参与者的赔偿选择,解决了不同质量等级的电能的定价问题,可以实现电能质量事故的合理赔偿和电磁污染超标排放的合理处罚,为供电商的电能质量投资决策提供了参考,同时提供了提高电能质量治理效率的激励机制,从而促进全社会综合效益的提高.算例证实了该方法的合理性.文中还讨论了电能质量市场投资的风险管理问题,最后提出了风险管理机制在实际应用和今后研究中需要注意的问题和相关建议. 相似文献
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In this paper, it is suggested that the preference of an individual consumer for its power supply reliability should be considered when scheduling the system reserve. The mechanism of ‘provider insurance’ is introduced and the reserve market is to be managed as an insurance system. In our modeling, the generator who provides the insurance of reliable power supply via its reserve, should always collect the payment (the premium), and be rewarded with the spot market price for its called reserve. The consumer who buys the insurance, pays premium and thus obtains a reliable power supply (the claim). It is argued that such a market mechanism will result in the maximum social welfare. Moreover, it is shown that there is a kind of ‘moral hazard in reverse’ fact that will further improve the market efficiency. Later on, discussions on implementing the proposed method are given, and an illustrative example is provided to show basic features of the proposed method. 相似文献
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在主动配电网中分布式资源(distributed energy resources,DERs)渗透率不断上升及电力市场改革不断推进的背景下,高比例DERs引起的线路过载和节点电压越限等网络阻塞现象不容忽视。针对主动配电网的阻塞问题,该文提出基于配电网节点电价(distribution location marginal price,DLMP)的日前-实时阻塞管理模型。在日前阶段,各负荷聚合商(aggregator,Agg)首先预测日前市场电价并收集相关DERs信息,然后配电网管理员在保证用户用电需求的同时使其用电支出最小,并兼顾网络约束制定DLMP发布给Agg,Agg得到日前交易计划;在实时阶段,各Agg更新DERs信息,并根据配电网管理员更新的DLMP重新调整日前交易产生的偏差。最后,通过IEEE33节点算例进行仿真验证,结果表明提出的阻塞管理模型可以有效解决主动配电网在日前和实时两阶段的阻塞问题,保证线路容量及节点电压在允许的安全范围内。 相似文献