Latvia has a well-developed hydropower industry, and most of the total electricity generated in the country comes directly from hydropower plants (HPPs). The Daugava HPP cascade power plants are the largest HPPs in Latvia and also in the Baltics, which ensure a high share of renewable energy (NPP) not only in the energy balance of Latvenergo AS, but also in Latvia as a whole. In 2020, 2.5 terawatt hours (TWh) of electricity was generated at the Daugava HPP, which makes up 59% of the total amount of electricity generated by Latvenergo AS. Last year, 23 percent more electricity was produced than a year earlier, and the development of the HPP inflow was determined by the normalization of the Daugava inflow compared to the atypically low inflow in 2019. Plavinas HPP with an installed capacity of 908 megawatts (MW) and ten hydro units is the largest HPP in the Baltic States and one of the largest in the European Union (EU). It plays an important role in ensuring the stability of the Baltic power system in the event of unplanned shutdowns or accidents at base stations. Pļaviņas HPP also serves as a synchronous compensator for voltage regulation in high-voltage electrical networks. However, not only large HPPs are operating in Latvia, low-capacity HPPs are also widespread here, the number of which in our country at the beginning of 2021 exceeded one hundred and fifty, but the total installed capacity was 27 MW. They produce about two to three percent of the total amount of energy produced by HPPs in Latvia.