Photovoltaic to the grid "duck" load curve, battery energy storage is the most promising "roast duck" method

2022/04/08

  Author :Iflowpower – Portable Power Station Supplier

The Forbes website publishes the article DavidCarlin article, the topic is: THSOLARREVOLUTIONISCOMING: Duck! The previous sentence means "the solar revolution is coming", here Duck is twice: one side refers to the load "duck" curve brought by solar photovoltaic, another Aspect, refers to how to focus on this duck curve. When the California Independent System Operator (CAISO) was evaluated when the electricity production and demand in California, the "duck" was found for the first time. Over the past few decades, various national grid operators have mastered the prediction model of demand, and can scheder power generation accordingly to meet the demand at any time.

However, the appearance of solar photovoltaic appearance has added a new dimension to the calculation of demand. Unlike coal electricity, nuclear energy and natural gas power generation, solar energy is "unmodable", which means it can't add or decrease at will. Instead, solar power depends on the weather, season and time.

Solar intermittent means that grid managers must reconsider how to use conventional power plants. The more the solar power is, the lower the demand for conventional power plants (called "net load"). In a typical day, the net load map looks like a duck.

In the morning, with more solar photovoltaic Internet (Ducks), the net load declines. When the sun is the strongest (the abdomen of the duck), the net load is at noon. Then, in the evening, with the decline in solar power and the new increase in the overall energy demand, the net load increases rapidly.

Finally, when people sleep (duck head), the net load declines. With the new increase of solar power, the stomach of the duck will get deeper, the neck is getting longer. This only looks like a friendly duck to make the grid scheduling headache.

Basic load power plants (such as coal and) construction is to continue to operate. If the existence of the duck, close these basic load power plants at noon, then running in the evening is difficult and expensive. The grid administrator usually relies on natural gas as a peak pad power plant to deal with the change in demand, but many natural gas plants are only in the peak, and they are economically effective to economy and consumers.

In addition, a large fluctuations in the net load will damage the infrastructure of the grid. A secondary solution is to "cut" solar energy, limit the solar power generation of the grid to the grid, but this will result in a lot of renewable energy energy waste. Can we "cook this duck"? Although the use of solar photovoltaic use does have a challenge, there are many effective solutions.

First, by creating a larger grid system, you can perform solar power in more places, you can smoothing a peak load in a certain extent. Second, establishing a real-time market incentive mechanism will also help. At present, consumers and companies buy electricity at average price.

However, due to changes in supply and demand, the spot price of electricity changes very large. When the demand is the largest, a real-time pricing smart grid will charge more evening electricity bills. This price signal may prompt people to reduce consumption during high electricity prices, alleviating demand surgery.

Similarly, real-time pricing will allow users to sell electric power to grid in a reasonable price, reduce excess production during excess power supply. Real-time pricing can also be combined with energy efficiency measures. Specifically, consumers have higher energy efficiency products, and do more things with less energy.

Since 1980, the US domestic product has risen by nearly 200%, and the energy use has increased by less than 50%. It is improving the efficiency and reduces the pressure on the grid. It saves users a year for users.

US $ 100. In power supply, grid operators can use big data and machine learning to better predict supply and demand changes. In addition, different solar technology can also play uses.

Spotting Solar Power Generation (CSP) uses mirrors to focus, heat the water and drive turbine power generation, produce more adjustable energy, can supplement photovoltaic power generation by running in different regions and different time periods. From other renewable energy technologies such as biofuels, tidal energy, will continue to rise, which helps to achieve diversification of clean energy structures. Finally, battery energy is the most promising "roast duck" method.

Now, new battery technology achieves greater energy storage in an capable price. In the past decade, the battery price fell by nearly 90%. Many experts think this is just a beginning.

A report of Woodmackenzie is expected that power storage will rise more than 1300% between 2018-12024. UBS analysts estimate that by 2030 power energy storage industry may value nearly 5 trillion US dollars. If it is "10 years of solar energy" in the 1960s, then the 1920s is likely to be "10 years of battery energy storage", such development will enable solar manufacturers to store energy, and release it when they want it.

In the grid, I will solve the duck problem in one for all.

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