required to organize local grid enterprises and distributed photovoltaic grid-connected entities to sign grid-connected peak shaving agreements to clarify the responsibilities, obligations, start-up conditions, technical means and related exemption clauses of distributed photovoltaic participation in peak shaving. Non-household distributed photovoltaics are all required to sign grid-connected peak shaving agreements, and those that have not been signed within the time limit shall be given priority to participate in peak shaving; household distributed photovoltaics are encouraged to sign grid-connected peak shaving agreements and undertake peak shaving obligations fairly.
With the approaching of the Spring Festival, the Hebei Development and Reform Commission recently issued the Notice on the Safe and Stable Operation of the Southern Hebei Power Grid during the Spring Festival and other special periods (hereinafter referred to as the Notice), requiring the municipal power operation and management departments to organize local power grid enterprises and distributed photovoltaic grid-connected entities to sign grid-connected peak-shaving agreements. Responsibilities and obligations, starting conditions, technical means and relevant exemption clauses for distributed photovoltaic to participate in peak shaving are clarified. Non-household distributed photovoltaics are all required to sign grid-connected peak shaving agreements, and those that have not been signed within the time limit shall be given priority to participate in peak shaving; household distributed photovoltaics are encouraged to sign grid-connected peak shaving agreements and undertake peak shaving obligations fairly.
According to the reporter's understanding, this is the first time in Hebei Province over the years that distributed photovoltaic is required to participate in peak shaving. Under the background of the continuous growth of distributed photovoltaic installed capacity, what kind of peak shaving pressure is the grid facing? What impact will participating in peak shaving bring to the investment income of distributed photovoltaic?
Distributed photovoltaic has become the main power source in the local area, and the regulation capacity of the power system is insufficient
. The Notice points out that the installed capacity of new energy in the southern Hebei power grid has increased rapidly, among which the installed capacity of distributed photovoltaic has exceeded 15 million kilowatts, accounting for nearly 1/4, and has become one of the main power sources. Affected
by the fact that a large number of distributed photovoltaics do not participate in the operation adjustment, the problem of insufficient regulation capacity of the power system has gradually become prominent. Especially in the special period of low electricity load such as the Spring Festival, it is impossible to meet the peak shaving demand of the power system only through conventional thermal power and centralized new energy regulation, which affects the stable operation of the system and reliable power supply, and brings serious adverse effects on people's livelihood heating.
As for the specific arrangement of peak shaving measures, the Notice clearly States that power grid enterprises should ensure the safety of power grid and the stability of heating as the premise, when the conventional regulation means can not meet the requirements of system peak shaving, and new energy is needed to participate in the operation adjustment. New energy should be organized to participate in peak shaving in accordance with the order of "first centralized, then distributed", "first non-household, then household" and the principle of "openness, fairness and impartiality". If distributed photovoltaic is arranged to participate in peak shaving, it should be reported to the Hebei Development and Reform Commission in advance.
According to the requirements of the Notice, the deadline for signing the peak shaving agreement is December 31, 2022. Wang Mou, a responsible person of an enterprise engaged in distributed photovoltaic development in Hebei Province, said that the company's industrial and commercial distributed photovoltaic projects had completed the signing of peak shaving agreements before New Year's Day. "It basically belongs to compulsory peak shaving, which power station does not sign an agreement to adjust first, when the time comes, if all shut down, the loss will be even greater, so we must sign an agreement."
Unlike industrial and commercial distribution, household photovoltaic is not included in the mandatory peak shaving, but the Notice has clearly stated that household photovoltaic should be encouraged to sign grid-connected peak shaving agreements. Insiders revealed that recently, some villages and towns have begun to mobilize villagers to sign peak shaving agreements. "Although the document says" encouragement ", but specifically to the county and village implementation level, farmers have been given" preventive injections ", telling everyone that the province encourages the suspension of power stations for a few days during the Spring Festival. Less power generation and less money, the villagers are certainly unwilling to sign the agreement is not much.
Peak-shaving devices or owners need to invest on their own, the specific peak-shaving arrangements are not yet clear
, Wang told reporters that after signing the agreement, distributed photovoltaic power plants also need to install special peak-shaving devices. "As far as the current situation is concerned, the cost is likely to be borne by the owners of the power station themselves."
"Household photovoltaic monomer capacity is small, if it participates in peak shaving, it is basically completely turned off, peak shaving device is equivalent to a switch, the cost is not high.". But industrial and commercial power stations are not simply cut off, to adjust according to power, the cost of peak shaving devices will be much higher. Wang Mou said that according to the different capacity of power stations, the overall cost of installing peak shaving devices in 380 V low-voltage grid-connected power stations is more than 100000 yuan. "If it is a high-voltage grid-connected project, it may need more than 300 thousand."
In addition to worrying about additional investment, owners are also concerned about the time and frequency of photovoltaic participation in peak shaving. "Notice" said the Spring Festival and other special periods, this'period 'is a few days? What else does "wait" include? How to define'special period '? To what extent does load reduction require distributed photovoltaic to participate in peak shaving? Will there be other special circumstances after participation? These specific issues are not clear. According to the insiders, from the perspective of safe and orderly operation of the power grid, distributed photovoltaic development enterprises also understand the necessity of participating in peak shaving, and short-term peak shaving will not "hurt the overall revenue". "But if it becomes normal, or if it is adjusted at will without effective planning and prior notice, it will inevitably reduce the expected revenue of the power plant, and may also affect the overall life of the project." Statistics from the
State Energy Administration show that in the first three quarters of 2022, the total installed capacity of photovoltaic power in Hebei Province was 36.73 million kilowatts, of which 17.56 million kilowatts were distributed photovoltaic power, and the total installed capacity of distributed photovoltaic power was second only to that of Shandong Province. It ranks second in the country. As early as the Spring Festival of 2022, Shandong Province has required all distributed photovoltaic projects, including household photovoltaic, to participate in grid peak shaving.
"The proportion of distributed installed capacity is getting higher and higher, so it is inevitable to participate in peak shaving, and the competent authorities are now considering regulation from the source." Wang Mou said that after October 2022, it has been difficult to apply for new installation indicators for both industrial and commercial and household photovoltaic projects in the Southern Hebei Power Grid region. "New energy is installed too much, consumption can not keep up with, abandoned electricity has a trend of aggravation, we can only control the installation."
Moreover, since December 1, 2022, industrial, commercial and other users in the Southern Hebei Power Grid region have begun to implement the new time-of-use electricity price policy. Except from June to August, the 12-15 hours with higher PV output in other months are adjusted to the valley period, and the electricity price in the valley period is reduced by 70% on the basis of the flat electricity price.
Reporters learned that for clear peak shaving arrangements, reasonable sharing of peak shaving device costs and other issues, at present, some distributed photovoltaic investors in Hebei Southern Power Grid region are reflecting their demands to the competent authorities through various channels. Our reporter will also continue to pay attention to the specific situation of distributed photovoltaic power stations participating in peak shaving in Hebei Southern Power Grid during the Spring Festival.
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