隨著分布式光伏的快速發(fā)展，部分地區(qū)分布式光伏裝機(jī)比例高的地區(qū)，出現(xiàn)電網(wǎng)接入和消納受限的問題。分布式光伏的裝機(jī)規(guī)模可能會達(dá)到電網(wǎng)承受極限，在電網(wǎng)承載力未得到有效改善前，當(dāng)?shù)仉娋W(wǎng)是否可以暫停新增分布式電源項目接入？
在電網(wǎng)承載力未得到有效改善前，當(dāng)?shù)仉娋W(wǎng)公司可以采取以下四項措施，實現(xiàn)分布式光伏“應(yīng)接盡接”！
1）電網(wǎng)企業(yè)應(yīng)加強(qiáng)配電網(wǎng)升級改造，努力做到應(yīng)接盡接；
2）電網(wǎng)企業(yè)可增容或新建配電變壓器；
3）電網(wǎng)企業(yè)可采取適當(dāng)反送電措施，
4）對超過電網(wǎng)企業(yè)保障性并網(wǎng)規(guī)模以外的新增裝機(jī)，也可配建或購買調(diào)峰和儲能能力。
因受前期光伏補(bǔ)貼政策的影響，供電轄區(qū)內(nèi)群眾投資建設(shè)分布式光伏項目積極性高漲，光伏電站扎堆新上，造成35kV變電站接入光伏容量嚴(yán)重超標(biāo)，已造成上級電源220kV變電站出現(xiàn)反向供電。 為保障轄區(qū)內(nèi)廣大居民的可靠安全有序用電，是否可以依據(jù)國家能源局發(fā)布的《分布式電源接入電網(wǎng)承載力評估導(dǎo)則》（DL/T2041-2019）第9條.電網(wǎng)承載力等級劃分中9.4評估區(qū)域內(nèi)因分布式電源導(dǎo)致向220kV及以上電網(wǎng)反送電，該區(qū)域評估等級應(yīng)為紅色及表1評估等級劃分中紅色建議：
在電網(wǎng)承載力未得到有效改善前，暫停新增分布式電源項目接入的相關(guān)要求， 暫停35kV變電站供電范圍內(nèi)新建分布式光伏電站（包括村集體分布式光伏電站、工商業(yè)分布式電站及戶用分布式光伏電站）項目備案的辦理和接入工作？
隨著光伏安裝容量的增大，變電站變壓器出現(xiàn)故障的可能性升高，出現(xiàn)大面積停電的概率增大，因此光伏的并網(wǎng)接入應(yīng)在滿足廣大居民安全有序用電的基礎(chǔ)上進(jìn)行，目前國家政策是光伏安裝按照“應(yīng)接盡接”的原則，但是部分地區(qū)電網(wǎng)已達(dá)到承受極限，如何規(guī)范地方光伏安裝目前沒有任何針對性的政策，同時電網(wǎng)建設(shè)需要相關(guān)部門審批周期較長，在保證居民正常用電和光伏并網(wǎng)應(yīng)接盡接中存在矛盾，如何選擇現(xiàn)在相關(guān)部門存在爭議。在地區(qū)電網(wǎng)無法承載光伏并網(wǎng)的情況下，是否可以按照《分布式電源接入電網(wǎng)承載力評估導(dǎo)則》中的規(guī)定： 在電網(wǎng)承載力未得到有效改善前，暫停新增分布式電源項目接入。
分布式光伏有利于消減電力尖峰負(fù)荷，有利于節(jié)約優(yōu)化配電網(wǎng)投資，有利于引導(dǎo)居民綠色消費(fèi)，國家積極支持開展相關(guān)工作。
電網(wǎng)企業(yè)應(yīng)充分考慮分布式光伏大規(guī)模接入的需求，加強(qiáng)配電網(wǎng)升級改造，努力做到應(yīng)接盡接。
分布式光伏接入電網(wǎng)可參考《分布式電源接入電網(wǎng)承載力評估導(dǎo)則》（DL/T 2041-2019）（以下簡稱《導(dǎo)則》）。根據(jù)《導(dǎo)則》規(guī)定，“…因分布式電源導(dǎo)致220kV及以上電網(wǎng)反送電”的，評估等級為紅色。應(yīng)“在電網(wǎng)承載力未得到有效改善前，暫停新增分布式電源項目接入”。
對于在附近臺區(qū)有消納條件的，
電網(wǎng)企業(yè)可增容或新建配電變壓器； 對于裝機(jī)超過局部電網(wǎng)承載能力的，
電網(wǎng)企業(yè)可采取適當(dāng)反送電措施， 為分布式電源提供并網(wǎng)服務(wù)。同時，根據(jù)《國家發(fā)展改革委
國家能源局關(guān)于鼓勵可再生能源發(fā)電企業(yè)自建或購買調(diào)峰能力增加并網(wǎng)規(guī)模的通知》（發(fā)改運(yùn)行〔2021〕1138號），對超過電網(wǎng)企業(yè)保障性并網(wǎng)規(guī)模以外的新增裝機(jī)，
也可配建或購買調(diào)峰和儲能能力， 以提升新能源并網(wǎng)規(guī)模。
《分布式電源接入電網(wǎng)承載力評估導(dǎo)則》（DL/T 2041-2019）
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With the rapid development of distributed photovoltaics, some regions with high installed proportion of distributed photovoltaics have encountered problems of limited grid access and consumption. The installed scale of distributed photovoltaics
may reach the maximum capacity of the power grid. Can the local power grid suspend the connection of new distributed power projects until the capacity of the power grid is effectively improved?
In response, the National Energy Administration
clearly replied:
Before the load-bearing capacity of the power grid is effectively improved, the local power grid company can take the following four measures to achieve distributed photovoltaic "should be connected as soon as possible"!
1) Power grid enterprises should strengthen the upgrading and transformation of distribution networks, and strive to achieve full integration as needed;
2) Power grid enterprises can increase capacity or build new distribution transformers;
3) Power grid enterprises can take appropriate anti transmission measures,
4) For new installations beyond the guaranteed grid connection scale of power grid enterprises, peak shaving and energy storage capacity can also be built or purchased.
Question:
Due to the impact of the early photovoltaic subsidy policy, the enthusiasm of the people in the power supply area to invest in the construction of distributed photovoltaic projects has increased. Photovoltaic power stations have piled up
and new ones have been added, causing the photovoltaic capacity of 35kV substations to seriously exceed the standard, and causing reverse power supply to the higher-level 220kV substations. In order to ensure the reliable, safe, and orderly use
of electricity by the residents within the jurisdiction, can it be based on Article 9 of the "Guidelines for Evaluating the Carrying Capacity of Distributed Power Sources Connected to Power Grids" (DL/T2041-2019) issued by the National Energy
Administration? According to 9.4 of the classification of power grid carrying capacity levels, in the assessment area, distributed power sources can cause reverse power transmission to 220kV and above power grids, The evaluation level of this
area should be in red, and the red suggestion in Table 1 is to suspend the relevant requirements for the connection of new distributed power generation projects and the filing and connection of new distributed photovoltaic power stations (including
village distributed photovoltaic power stations, industrial and commercial distributed photovoltaic power stations, and household distributed photovoltaic power stations) within the power supply range of 35kV substations until the carrying capacity
of the power grid is effectively improved?
With the increase of photovoltaic installation capacity, the possibility of transformer failures in substations increases, and the probability of large-scale power outages increases. Therefore,
photovoltaic grid connection should be carried out on the basis of meeting the safe and orderly electricity consumption of the majority of residents. Currently, the national policy is that photovoltaic installation should follow the principle
of "should be connected as soon as possible". However, some regional power grids have reached their limit, and there is currently no targeted policy on how to regulate local photovoltaic installation, At the same time, the construction of the
power grid requires a long approval period from relevant departments, and there is a contradiction between ensuring the normal use of electricity by residents and the complete connection of photovoltaic power grid. There is controversy over how
to choose the relevant departments at present. In the event that the regional power grid is unable to support photovoltaic grid connection, can the provision in the "Guidelines for Evaluating the Carrying Capacity of Distributed Power Grid Connection"
be followed: suspend the connection of new distributed power projects until the carrying capacity of the power grid is effectively improved.
Message time: July 29, 2022
Reply from the National Energy Administration:
Distributed photovoltaics are beneficial for reducing peak power loads, saving and optimizing investment in distribution networks, and guiding green
consumption among residents. The state actively supports related work. Power grid enterprises should fully consider the demand for large-scale access to distributed photovoltaics and strengthen the upgrading of distribution networks
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