A ANEEL (National Electric Energy Agency) established on Tuesday (12) the procedures and criteria for determining and paying operating restrictions for constrained-off of centralized photovoltaic plants.
The topic was the subject of Public Consultation No. 48/22, which received contributions between October 13th and November 28th of last year.
O constrained-off These are operating restriction events that lead to a reduction or temporary interruption of the electrical energy generation of a plant or a group of plants.
As generation cuts occur for reasons external to the plants, it is up to consumers to compensate the agents whose generation was frustrated. This cost is paid through the ESS (System Service Charge).
The new resolution is valid for centrally dispatched solar plants (Type I) or the sets are considered in the programming by the ONS (National Electric System Operator).
According to ANEEL, the events of constrained-off of solar plants will be recognized for any of the following reasons:
a) Reason for external unavailability up to a limit considered ordinary: consumers assumed the constrained-off costs due to external unavailability from the limit of 30 hours and 30 minutes per year in the respective plants, whether in:
- (i) transmission facilities classified as Basic Network; or
- (ii) Other Transmission Facilities (DITs) within the scope of distribution. This limit will be updated annually with the publication of the average unavailability of Transmission Functions (FTs).
This classification excludes facilities for exclusive or shared use by the generator, under its management or by third parties. This classification would include the unavailability of transmission lines, transformers, circuit breakers and substation installations in general.
b) Reason for meeting electrical reliability requirements: motivated by reasons of electrical reliability that do not originate from unavailability of equipment in the transmission system. This classification would include situations of generation reduction due to reaching limits on transmission lines, equipment loading, dynamic stability requirements, etc.
c) Energy ratio: motivated by the impossibility of allocating generation to the load. This classification would include generation restrictions for load and generation balance purposes, as long as they are not motivated by the previous reasons.
The ONS will be responsible for calculating the energy generation frustration resulting from a power event constrained-off. The calculation will consider the plant's productivity curve based on measured generation data and meteorological variables, with annual review.
To carry out the calculation, the generators must provide access to the records of solarimetric measurements to the ONS, as well as present the availability of nominal power of the inverters since the date of the plant's commercial operation.
Type I plants are those that meet at least one of these requirements:
- Plants connected to the Basic Grid (RB) and that affect electroenergetic operation;
- Plants connected outside the RB whose maximum injected power contributes to minimizing operational problems and providing greater security for the network; It is
- Plants with installed capacity greater than 30 MW. Dispatch from these plants is controlled by the ONS.
As Type II plants are not necessarily connected to RB and do not impact the electrical safety of the operating network, but affect planning and operational processes in real time.
As Type III plants are connected outside RB and do not cause impacts on the electroenergetic operation of the SIN (National Interconnected System). Self-production enterprises whose demand is greater than generation also fall into this category.
An answer
and what about the connections below 75k that companies are obliging customers to install substances. How is it?